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1.1 ! root 1: /* Asynchronous subprocess control for GNU Emacs. ! 2: Copyright (C) 1985, 1986, 1987, 1988, 1990 Free Software Foundation, Inc. ! 3: ! 4: This file is part of GNU Emacs. ! 5: ! 6: GNU Emacs is free software; you can redistribute it and/or modify ! 7: it under the terms of the GNU General Public License as published by ! 8: the Free Software Foundation; either version 1, or (at your option) ! 9: any later version. ! 10: ! 11: GNU Emacs is distributed in the hope that it will be useful, ! 12: but WITHOUT ANY WARRANTY; without even the implied warranty of ! 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ! 14: GNU General Public License for more details. ! 15: ! 16: You should have received a copy of the GNU General Public License ! 17: along with GNU Emacs; see the file COPYING. If not, write to ! 18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ ! 19: ! 20: ! 21: /* This must precede sys/signal.h on certain machines. */ ! 22: #include <sys/types.h> ! 23: #include <signal.h> ! 24: ! 25: #include "config.h" ! 26: ! 27: #ifdef VMS ! 28: /* Prevent the file from being totally empty. */ ! 29: static dummy () {} ! 30: #endif ! 31: ! 32: #ifdef subprocesses ! 33: /* The entire file is within this conditional */ ! 34: ! 35: #include <stdio.h> ! 36: #include <errno.h> ! 37: #include <setjmp.h> ! 38: #include <sys/file.h> ! 39: #include <sys/stat.h> ! 40: ! 41: #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ ! 42: #include <sys/socket.h> ! 43: #include <netdb.h> ! 44: #include <netinet/in.h> ! 45: #endif /* HAVE_SOCKETS */ ! 46: ! 47: #if defined(BSD) || defined(STRIDE) ! 48: #include <sys/ioctl.h> ! 49: #if !defined (O_NDELAY) && defined (HAVE_PTYS) ! 50: #include <fcntl.h> ! 51: #endif /* HAVE_PTYS and no O_NDELAY */ ! 52: #endif /* BSD or STRIDE */ ! 53: #ifdef USG ! 54: #ifndef NO_TERMIO ! 55: #include <termio.h> ! 56: #endif ! 57: #include <fcntl.h> ! 58: #endif /* USG */ ! 59: ! 60: #ifdef NEED_BSDTTY ! 61: #include <sys/bsdtty.h> ! 62: #endif ! 63: ! 64: #ifdef NEED_TERMIOS ! 65: #include <sys/termios.h> ! 66: #endif ! 67: ! 68: #ifdef TRITON88 /* To make emacs send C-c correctly in shell */ ! 69: #define TIOCGPGRP FIOGETOWN ! 70: #endif ! 71: ! 72: #ifdef HPUX ! 73: #undef TIOCGPGRP ! 74: #endif ! 75: ! 76: /* Include time.h or sys/time.h or both. */ ! 77: #include "gettime.h" ! 78: ! 79: #if defined (HPUX) && defined (HAVE_PTYS) ! 80: #include <sys/ptyio.h> ! 81: #endif ! 82: ! 83: #ifdef AIX ! 84: #include <sys/pty.h> ! 85: #include <unistd.h> ! 86: #endif /* AIX */ ! 87: ! 88: #ifdef SYSV_PTYS ! 89: #include <sys/tty.h> ! 90: #include <sys/pty.h> ! 91: #endif ! 92: ! 93: #ifdef XENIX ! 94: #undef TIOCGETC /* Avoid confusing some conditionals that test this. */ ! 95: #endif ! 96: ! 97: #ifdef BROKEN_TIOCGETC ! 98: #undef TIOCGETC ! 99: #endif ! 100: ! 101: #ifdef BROKEN_O_NONBLOCK ! 102: #undef O_NONBLOCK ! 103: #endif ! 104: ! 105: #undef NULL ! 106: #include "lisp.h" ! 107: #include "window.h" ! 108: #include "buffer.h" ! 109: #include "process.h" ! 110: #include "termhooks.h" ! 111: #include "termopts.h" ! 112: #include "commands.h" ! 113: #include "dispextern.h" ! 114: ! 115: Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; ! 116: extern Lisp_Object Qexit; ! 117: ! 118: /* a process object is a network connection when its childp field is neither ! 119: Qt nor Qnil but is instead a string (name of foreign host we ! 120: are connected to + name of port we are connected to) */ ! 121: ! 122: #ifdef HAVE_SOCKETS ! 123: #define NETCONN_P(p) (XGCTYPE (XPROCESS (p)->childp) == Lisp_String) ! 124: #else ! 125: #define NETCONN_P(p) 0 ! 126: #endif /* HAVE_SOCKETS */ ! 127: ! 128: /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals ! 129: testing SIGCHLD. */ ! 130: ! 131: #if !defined (SIGCHLD) && defined (SIGCLD) ! 132: #define SIGCHLD SIGCLD ! 133: #endif /* SIGCLD */ ! 134: ! 135: #include "emacssignal.h" ! 136: ! 137: /* Define the structure that the wait system call stores. ! 138: On many systems, there is a structure defined for this. ! 139: But on vanilla-ish USG systems there is not. */ ! 140: ! 141: #ifndef WAITTYPE ! 142: #if !defined (BSD) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER) ! 143: #define WAITTYPE int ! 144: #define WIFSTOPPED(w) ((w&0377) == 0177) ! 145: #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0) ! 146: #define WIFEXITED(w) ((w&0377) == 0) ! 147: #define WRETCODE(w) (w >> 8) ! 148: #define WSTOPSIG(w) (w >> 8) ! 149: #define WTERMSIG(w) (w & 0377) ! 150: #ifndef WCOREDUMP ! 151: #define WCOREDUMP(w) ((w&0200) != 0) ! 152: #endif ! 153: #else ! 154: #ifdef BSD4_1 ! 155: #include <wait.h> ! 156: #else ! 157: #include <sys/wait.h> ! 158: #endif /* not BSD 4.1 */ ! 159: ! 160: #define WAITTYPE union wait ! 161: #define WRETCODE(w) w.w_retcode ! 162: #define WCOREDUMP(w) w.w_coredump ! 163: ! 164: #ifdef HPUX ! 165: /* HPUX version 7 has broken definitions of these. */ ! 166: #undef WTERMSIG ! 167: #undef WSTOPSIG ! 168: #undef WIFSTOPPED ! 169: #undef WIFSIGNALED ! 170: #undef WIFEXITED ! 171: #endif ! 172: ! 173: #ifndef WTERMSIG ! 174: #define WTERMSIG(w) w.w_termsig ! 175: #endif ! 176: #ifndef WSTOPSIG ! 177: #define WSTOPSIG(w) w.w_stopsig ! 178: #endif ! 179: #ifndef WIFSTOPPED ! 180: #define WIFSTOPPED(w) (WTERMSIG (w) == 0177) ! 181: #endif ! 182: #ifndef WIFSIGNALED ! 183: #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0) ! 184: #endif ! 185: #ifndef WIFEXITED ! 186: #define WIFEXITED(w) (WTERMSIG (w) == 0) ! 187: #endif ! 188: #endif /* BSD or UNIPLUS or STRIDE */ ! 189: #endif /* no WAITTYPE */ ! 190: ! 191: extern errno; ! 192: extern sys_nerr; ! 193: extern char *sys_errlist[]; ! 194: ! 195: #ifndef BSD4_1 ! 196: extern char *sys_siglist[]; ! 197: #else ! 198: char *sys_siglist[] = ! 199: { ! 200: "bum signal!!", ! 201: "hangup", ! 202: "interrupt", ! 203: "quit", ! 204: "illegal instruction", ! 205: "trace trap", ! 206: "iot instruction", ! 207: "emt instruction", ! 208: "floating point exception", ! 209: "kill", ! 210: "bus error", ! 211: "segmentation violation", ! 212: "bad argument to system call", ! 213: "write on a pipe with no one to read it", ! 214: "alarm clock", ! 215: "software termination signal from kill", ! 216: "status signal", ! 217: "sendable stop signal not from tty", ! 218: "stop signal from tty", ! 219: "continue a stopped process", ! 220: "child status has changed", ! 221: "background read attempted from control tty", ! 222: "background write attempted from control tty", ! 223: "input record available at control tty", ! 224: "exceeded CPU time limit", ! 225: "exceeded file size limit" ! 226: }; ! 227: #endif ! 228: ! 229: #ifdef vipc ! 230: ! 231: #include "vipc.h" ! 232: extern int comm_server; ! 233: extern int net_listen_address; ! 234: #endif /* vipc */ ! 235: ! 236: /* Communicate exit status of synch process to callproc.c. */ ! 237: extern int synch_process_retcode; ! 238: extern char *synch_process_death; ! 239: ! 240: /* t means use pty, nil means use a pipe, ! 241: maybe other values to come. */ ! 242: Lisp_Object Vprocess_connection_type; ! 243: ! 244: #ifdef SKTPAIR ! 245: #ifndef HAVE_SOCKETS ! 246: #include <sys/socket.h> ! 247: #endif ! 248: #endif /* SKTPAIR */ ! 249: ! 250: /* Number of events of change of status of a process. */ ! 251: int process_tick; ! 252: ! 253: /* Number of events for which the user or sentinel has been notified. */ ! 254: int update_tick; ! 255: ! 256: int delete_exited_processes; ! 257: ! 258: #ifdef FD_SET ! 259: /* We could get this from param.h, but better not to depend on finding that. ! 260: And better not to risk that it might define other symbols used in this ! 261: file. */ ! 262: #define MAXDESC 64 ! 263: #define SELECT_TYPE fd_set ! 264: #else /* no FD_SET */ ! 265: #define MAXDESC 32 ! 266: #define SELECT_TYPE int ! 267: ! 268: /* Define the macros to access a single-int bitmap of descriptors. */ ! 269: #define FD_SET(n, p) (*(p) |= (1 << (n))) ! 270: #define FD_CLR(n, p) (*(p) &= ~(1 << (n))) ! 271: #define FD_ISSET(n, p) (*(p) & (1 << (n))) ! 272: #define FD_ZERO(p) (*(p) = 0) ! 273: #endif /* no FD_SET */ ! 274: ! 275: /* Mask of bits indicating the descriptors that we wait for input on */ ! 276: ! 277: SELECT_TYPE input_wait_mask; ! 278: ! 279: /* Indexed by descriptor, gives the process (if any) for that descriptor */ ! 280: Lisp_Object chan_process[MAXDESC]; ! 281: ! 282: /* Alist of elements (NAME . PROCESS) */ ! 283: Lisp_Object Vprocess_alist; ! 284: ! 285: Lisp_Object Qprocessp; ! 286: ! 287: Lisp_Object get_process (); ! 288: ! 289: /* Buffered-ahead input char from process, indexed by channel. ! 290: -1 means empty (no char is buffered). ! 291: Used on sys V where the only way to tell if there is any ! 292: output from the process is to read at least one char. ! 293: Always -1 on systems that support FIONREAD. */ ! 294: ! 295: int proc_buffered_char[MAXDESC]; ! 296: ! 297: /* These variables hold the filter about to be run, and its args, ! 298: between read_process_output and run_filter. ! 299: Also used in exec_sentinel for sentinels. */ ! 300: Lisp_Object this_filter; ! 301: Lisp_Object filter_process, filter_string; ! 302: ! 303: /* Compute the Lisp form of the process status, p->status, ! 304: from the numeric status that was returned by `wait'. */ ! 305: ! 306: update_status (p) ! 307: struct Lisp_Process *p; ! 308: { ! 309: union { int i; WAITTYPE wt; } u; ! 310: u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); ! 311: p->status = status_convert (u.wt); ! 312: p->raw_status_low = Qnil; ! 313: p->raw_status_high = Qnil; ! 314: } ! 315: ! 316: /* Convert a process status word in Unix format ! 317: to the list that we use internally. */ ! 318: ! 319: Lisp_Object ! 320: status_convert (w) ! 321: WAITTYPE w; ! 322: { ! 323: if (WIFSTOPPED (w)) ! 324: return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); ! 325: else if (WIFEXITED (w)) ! 326: return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), ! 327: WCOREDUMP (w) ? Qt : Qnil)); ! 328: else if (WIFSIGNALED (w)) ! 329: return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), ! 330: WCOREDUMP (w) ? Qt : Qnil)); ! 331: else ! 332: return Qrun; ! 333: } ! 334: ! 335: /* Given a status-list, extract the three pieces of information ! 336: and store them individually through the three pointers. */ ! 337: ! 338: void ! 339: decode_status (l, symbol, code, coredump) ! 340: Lisp_Object l; ! 341: Lisp_Object *symbol; ! 342: int *code; ! 343: int *coredump; ! 344: { ! 345: Lisp_Object tem; ! 346: ! 347: if (XTYPE (l) == Lisp_Symbol) ! 348: { ! 349: *symbol = l; ! 350: *code = 0; ! 351: *coredump = 0; ! 352: } ! 353: else ! 354: { ! 355: *symbol = XCONS (l)->car; ! 356: tem = XCONS (l)->cdr; ! 357: *code = XFASTINT (XCONS (tem)->car); ! 358: tem = XFASTINT (XCONS (tem)->cdr); ! 359: *coredump = !NULL (tem); ! 360: } ! 361: } ! 362: ! 363: /* Return a string describing a process status list. */ ! 364: ! 365: Lisp_Object ! 366: status_message (status) ! 367: Lisp_Object status; ! 368: { ! 369: Lisp_Object symbol; ! 370: int code, coredump; ! 371: Lisp_Object string, string2; ! 372: ! 373: decode_status (status, &symbol, &code, &coredump); ! 374: ! 375: if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) ! 376: { ! 377: string = build_string (code < NSIG ? sys_siglist[code] : "unknown"); ! 378: string2 = build_string (coredump ? " (core dumped)\n" : "\n"); ! 379: XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); ! 380: return concat2 (string, string2); ! 381: } ! 382: else if (EQ (symbol, Qexit)) ! 383: { ! 384: if (code == 0) ! 385: return build_string ("finished\n"); ! 386: string = Fint_to_string (make_number (code)); ! 387: string2 = build_string (coredump ? " (core dumped)\n" : "\n"); ! 388: return concat2 (build_string ("exited abnormally with code "), ! 389: concat2 (string, string2)); ! 390: } ! 391: else ! 392: return Fcopy_sequence (Fsymbol_name (symbol)); ! 393: } ! 394: ! 395: #ifdef HAVE_PTYS ! 396: ! 397: /* Open an available pty, returning a file descriptor. ! 398: Return -1 on failure. ! 399: The file name of the terminal corresponding to the pty ! 400: is left in the variable pty_name. */ ! 401: ! 402: char pty_name[24]; ! 403: ! 404: int ! 405: allocate_pty () ! 406: { ! 407: struct stat stb; ! 408: register c, i; ! 409: int fd; ! 410: ! 411: /* Some systems name their pseudoterminals so that there are gaps in ! 412: the usual sequence - for example, on HP9000/S700 systems, there ! 413: are no pseudoterminals with names ending in 'f'. So we wait for ! 414: three failures in a row before deciding that we've reached the ! 415: end of the ptys. */ ! 416: int failed_count = 0; ! 417: ! 418: #ifdef PTY_ITERATION ! 419: PTY_ITERATION ! 420: #else ! 421: for (c = FIRST_PTY_LETTER; c <= 'z'; c++) ! 422: for (i = 0; i < 16; i++) ! 423: #endif ! 424: { ! 425: #ifdef PTY_NAME_SPRINTF ! 426: PTY_NAME_SPRINTF ! 427: #else ! 428: #ifdef HPUX ! 429: sprintf (pty_name, "/dev/ptym/pty%c%x", c, i); ! 430: #else ! 431: #ifdef RTU ! 432: sprintf (pty_name, "/dev/pty%x", i); ! 433: #else ! 434: sprintf (pty_name, "/dev/pty%c%x", c, i); ! 435: #endif /* not RTU */ ! 436: #endif /* not HPUX */ ! 437: #endif /* no PTY_NAME_SPRINTF */ ! 438: ! 439: #ifdef PTY_OPEN ! 440: PTY_OPEN; ! 441: #else /* no PTY_OPEN */ ! 442: #ifndef IRIS ! 443: if (stat (pty_name, &stb) < 0) ! 444: { ! 445: failed_count++; ! 446: if (failed_count >= 3) ! 447: return -1; ! 448: } ! 449: else ! 450: failed_count = 0; ! 451: #ifdef O_NONBLOCK ! 452: fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); ! 453: #else ! 454: fd = open (pty_name, O_RDWR | O_NDELAY, 0); ! 455: #endif ! 456: #else /* Unusual IRIS code */ ! 457: fd = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); ! 458: if (fd < 0) ! 459: return -1; ! 460: if (fstat (fd, &stb) < 0) ! 461: return -1; ! 462: #endif /* IRIS */ ! 463: #endif /* no PTY_OPEN */ ! 464: ! 465: if (fd >= 0) ! 466: { ! 467: /* check to make certain that both sides are available ! 468: this avoids a nasty yet stupid bug in rlogins */ ! 469: #ifdef PTY_TTY_NAME_SPRINTF ! 470: PTY_TTY_NAME_SPRINTF ! 471: #else ! 472: /* In version 19, make these special cases use the macro above. */ ! 473: #ifdef HPUX ! 474: sprintf (pty_name, "/dev/pty/tty%c%x", c, i); ! 475: #else ! 476: #ifdef RTU ! 477: sprintf (pty_name, "/dev/ttyp%x", i); ! 478: #else ! 479: #ifdef IRIS ! 480: sprintf (pty_name, "/dev/ttyq%d", minor (stb.st_rdev)); ! 481: #else ! 482: sprintf (pty_name, "/dev/tty%c%x", c, i); ! 483: #endif /* not IRIS */ ! 484: #endif /* not RTU */ ! 485: #endif /* not HPUX */ ! 486: #endif /* no PTY_TTY_NAME_SPRINTF */ ! 487: #ifndef UNIPLUS ! 488: if (access (pty_name, 6) != 0) ! 489: { ! 490: close (fd); ! 491: #ifndef IRIS ! 492: continue; ! 493: #else ! 494: return -1; ! 495: #endif /* IRIS */ ! 496: } ! 497: #endif /* not UNIPLUS */ ! 498: setup_pty (fd); ! 499: return fd; ! 500: } ! 501: } ! 502: return -1; ! 503: } ! 504: #endif /* HAVE_PTYS */ ! 505: ! 506: Lisp_Object ! 507: make_process (name) ! 508: Lisp_Object name; ! 509: { ! 510: register Lisp_Object val, tem, name1; ! 511: register struct Lisp_Process *p; ! 512: char suffix[10]; ! 513: register int i; ! 514: ! 515: /* size of process structure includes the vector header, ! 516: so deduct for that. But struct Lisp_Vector includes the first ! 517: element, thus deducts too much, so add it back. */ ! 518: val = Fmake_vector (make_number ((sizeof (struct Lisp_Process) ! 519: - sizeof (struct Lisp_Vector) ! 520: + sizeof (Lisp_Object)) ! 521: / sizeof (Lisp_Object)), ! 522: Qnil); ! 523: XSETTYPE (val, Lisp_Process); ! 524: ! 525: p = XPROCESS (val); ! 526: XFASTINT (p->infd) = 0; ! 527: XFASTINT (p->outfd) = 0; ! 528: XFASTINT (p->pid) = 0; ! 529: XFASTINT (p->tick) = 0; ! 530: XFASTINT (p->update_tick) = 0; ! 531: p->raw_status_low = Qnil; ! 532: p->raw_status_high = Qnil; ! 533: p->status = Qrun; ! 534: p->mark = Fmake_marker (); ! 535: ! 536: /* If name is already in use, modify it until it is unused. */ ! 537: ! 538: name1 = name; ! 539: for (i = 1; ; i++) ! 540: { ! 541: tem = Fget_process (name1); ! 542: if (NULL (tem)) break; ! 543: sprintf (suffix, "<%d>", i); ! 544: name1 = concat2 (name, build_string (suffix)); ! 545: } ! 546: name = name1; ! 547: p->name = name; ! 548: Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); ! 549: return val; ! 550: } ! 551: ! 552: remove_process (proc) ! 553: register Lisp_Object proc; ! 554: { ! 555: register Lisp_Object pair; ! 556: ! 557: pair = Frassq (proc, Vprocess_alist); ! 558: Vprocess_alist = Fdelq (pair, Vprocess_alist); ! 559: Fset_marker (XPROCESS (proc)->mark, Qnil, Qnil); ! 560: ! 561: deactivate_process (proc); ! 562: } ! 563: ! 564: DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, ! 565: "Return t if OBJECT is a process.") ! 566: (obj) ! 567: Lisp_Object obj; ! 568: { ! 569: return XTYPE (obj) == Lisp_Process ? Qt : Qnil; ! 570: } ! 571: ! 572: DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, ! 573: "Return the process named NAME, or nil if there is none.") ! 574: (name) ! 575: register Lisp_Object name; ! 576: { ! 577: if (XTYPE (name) == Lisp_Process) ! 578: return name; ! 579: CHECK_STRING (name, 0); ! 580: return Fcdr (Fassoc (name, Vprocess_alist)); ! 581: } ! 582: ! 583: DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, ! 584: "Return the (or, a) process associated with BUFFER.\n\ ! 585: BUFFER may be a buffer or the name of one.") ! 586: (name) ! 587: register Lisp_Object name; ! 588: { ! 589: register Lisp_Object buf, tail, proc; ! 590: ! 591: if (NULL (name)) return Qnil; ! 592: buf = Fget_buffer (name); ! 593: if (NULL (buf)) return Qnil; ! 594: ! 595: for (tail = Vprocess_alist; !NULL (tail); tail = Fcdr (tail)) ! 596: { ! 597: proc = Fcdr (Fcar (tail)); ! 598: if (XTYPE (proc) == Lisp_Process && EQ (XPROCESS (proc)->buffer, buf)) ! 599: return proc; ! 600: } ! 601: return Qnil; ! 602: } ! 603: ! 604: /* This is how commands for the user decode process arguments */ ! 605: ! 606: Lisp_Object ! 607: get_process (name) ! 608: register Lisp_Object name; ! 609: { ! 610: register Lisp_Object proc; ! 611: if (NULL (name)) ! 612: proc = Fget_buffer_process (Fcurrent_buffer ()); ! 613: else ! 614: { ! 615: proc = Fget_process (name); ! 616: if (NULL (proc)) ! 617: proc = Fget_buffer_process (Fget_buffer (name)); ! 618: } ! 619: ! 620: if (!NULL (proc)) ! 621: return proc; ! 622: ! 623: if (NULL (name)) ! 624: error ("Current buffer has no process"); ! 625: else ! 626: error ("Process %s does not exist", XSTRING (name)->data); ! 627: /* NOTREACHED */ ! 628: } ! 629: ! 630: DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, ! 631: "Delete PROCESS: kill it and forget about it immediately.\n\ ! 632: PROCESS may be a process or the name of one, or a buffer name.") ! 633: (proc) ! 634: register Lisp_Object proc; ! 635: { ! 636: proc = get_process (proc); ! 637: XPROCESS (proc)->raw_status_low = Qnil; ! 638: XPROCESS (proc)->raw_status_high = Qnil; ! 639: if (NETCONN_P (proc)) ! 640: { ! 641: XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); ! 642: XSETINT (XPROCESS (proc)->tick, ++process_tick); ! 643: } ! 644: else if (XFASTINT (XPROCESS (proc)->infd)) ! 645: { ! 646: Fkill_process (proc, Qnil); ! 647: /* Do this now, since remove_process will make sigchld_handler do nothing. */ ! 648: XPROCESS (proc)->status ! 649: = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); ! 650: XSETINT (XPROCESS (proc)->tick, ++process_tick); ! 651: status_notify (); ! 652: } ! 653: remove_process (proc); ! 654: return Qnil; ! 655: } ! 656: ! 657: DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, ! 658: "Return the status of PROCESS: a symbol, one of these:\n\ ! 659: run -- for a process that is running.\n\ ! 660: stop -- for a process stopped but continuable.\n\ ! 661: exit -- for a process that has exited.\n\ ! 662: signal -- for a process that has got a fatal signal.\n\ ! 663: open -- for a network stream connection that is open.\n\ ! 664: closed -- for a network stream connection that is closed.\n\ ! 665: nil -- if arg is a process name and no such process exists.") ! 666: /* command -- for a command channel opened to Emacs by another process.\n\ ! 667: external -- for an i/o channel opened to Emacs by another process.\n\ */ ! 668: (proc) ! 669: register Lisp_Object proc; ! 670: { ! 671: register struct Lisp_Process *p; ! 672: register Lisp_Object status; ! 673: proc = Fget_process (proc); ! 674: if (NULL (proc)) ! 675: return proc; ! 676: p = XPROCESS (proc); ! 677: if (!NULL (p->raw_status_low)) ! 678: update_status (p); ! 679: status = p->status; ! 680: if (XTYPE (status) == Lisp_Cons) ! 681: status = XCONS (status)->car; ! 682: if (NETCONN_P (proc)) ! 683: { ! 684: if (EQ (status, Qrun)) ! 685: status = Qopen; ! 686: else if (EQ (status, Qexit)) ! 687: status = Qclosed; ! 688: } ! 689: return status; ! 690: } ! 691: ! 692: DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, ! 693: 1, 1, 0, ! 694: "Return the exit status of PROCESS or the signal number that killed it.\n\ ! 695: If PROCESS has not yet exited or died, return 0.\n\ ! 696: If PROCESS is a net connection that was closed remotely, return 256.") ! 697: (proc) ! 698: register Lisp_Object proc; ! 699: { ! 700: CHECK_PROCESS (proc, 0); ! 701: if (!NULL (XPROCESS (proc)->raw_status_low)) ! 702: update_status (XPROCESS (proc)); ! 703: if (XTYPE (XPROCESS (proc)->status) == Lisp_Cons) ! 704: return XCONS (XCONS (XPROCESS (proc)->status)->cdr)->car; ! 705: return make_number (0); ! 706: } ! 707: ! 708: DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, ! 709: "Return the process id of PROCESS.\n\ ! 710: This is the pid of the Unix process which PROCESS uses or talks to.\n\ ! 711: For a network connection, this value is nil.") ! 712: (proc) ! 713: register Lisp_Object proc; ! 714: { ! 715: CHECK_PROCESS (proc, 0); ! 716: return XPROCESS (proc)->pid; ! 717: } ! 718: ! 719: DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, ! 720: "Return the name of PROCESS, as a string.\n\ ! 721: This is the name of the program invoked in PROCESS,\n\ ! 722: possibly modified to make it unique among process names.") ! 723: (proc) ! 724: register Lisp_Object proc; ! 725: { ! 726: CHECK_PROCESS (proc, 0); ! 727: return XPROCESS (proc)->name; ! 728: } ! 729: ! 730: DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, ! 731: "Return the command that was executed to start PROCESS.\n\ ! 732: This is a list of strings, the first string being the program executed\n\ ! 733: and the rest of the strings being the arguments given to it.\n\ ! 734: For a non-child channel, this is nil.") ! 735: (proc) ! 736: register Lisp_Object proc; ! 737: { ! 738: CHECK_PROCESS (proc, 0); ! 739: return XPROCESS (proc)->command; ! 740: } ! 741: ! 742: DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, ! 743: 2, 2, 0, ! 744: "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") ! 745: (proc, buffer) ! 746: register Lisp_Object proc, buffer; ! 747: { ! 748: CHECK_PROCESS (proc, 0); ! 749: if (!NULL (buffer)) ! 750: CHECK_BUFFER (buffer, 1); ! 751: XPROCESS (proc)->buffer = buffer; ! 752: return buffer; ! 753: } ! 754: ! 755: DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, ! 756: 1, 1, 0, ! 757: "Return the buffer PROCESS is associated with.\n\ ! 758: Output from PROCESS is inserted in this buffer\n\ ! 759: unless PROCESS has a filter.") ! 760: (proc) ! 761: register Lisp_Object proc; ! 762: { ! 763: CHECK_PROCESS (proc, 0); ! 764: return XPROCESS (proc)->buffer; ! 765: } ! 766: ! 767: DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, ! 768: 1, 1, 0, ! 769: "Return the marker for the end of the last output from PROCESS.") ! 770: (proc) ! 771: register Lisp_Object proc; ! 772: { ! 773: CHECK_PROCESS (proc, 0); ! 774: return XPROCESS (proc)->mark; ! 775: } ! 776: ! 777: DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, ! 778: 2, 2, 0, ! 779: "Give PROCESS the filter function FILTER; nil means no filter.\n\ ! 780: When a process has a filter, each time it does output\n\ ! 781: the entire string of output is passed to the filter.\n\ ! 782: The filter gets two arguments: the process and the string of output.\n\ ! 783: If the process has a filter, its buffer is not used for output.") ! 784: (proc, filter) ! 785: register Lisp_Object proc, filter; ! 786: { ! 787: CHECK_PROCESS (proc, 0); ! 788: XPROCESS (proc)->filter = filter; ! 789: return filter; ! 790: } ! 791: ! 792: DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, ! 793: 1, 1, 0, ! 794: "Returns the filter function of PROCESS; nil if none.\n\ ! 795: See set-process-filter for more info on filter functions.") ! 796: (proc) ! 797: register Lisp_Object proc; ! 798: { ! 799: CHECK_PROCESS (proc, 0); ! 800: return XPROCESS (proc)->filter; ! 801: } ! 802: ! 803: DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, ! 804: 2, 2, 0, ! 805: "Give PROCESS the sentinel SENTINEL; nil for none.\n\ ! 806: The sentinel is called as a function when the process changes state.\n\ ! 807: It gets two arguments: the process, and a string describing the change.") ! 808: (proc, sentinel) ! 809: register Lisp_Object proc, sentinel; ! 810: { ! 811: CHECK_PROCESS (proc, 0); ! 812: XPROCESS (proc)->sentinel = sentinel; ! 813: return sentinel; ! 814: } ! 815: ! 816: DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, ! 817: 1, 1, 0, ! 818: "Return the sentinel of PROCESS; nil if none.\n\ ! 819: See set-process-sentinel for more info on sentinels.") ! 820: (proc) ! 821: register Lisp_Object proc; ! 822: { ! 823: CHECK_PROCESS (proc, 0); ! 824: return XPROCESS (proc)->sentinel; ! 825: } ! 826: ! 827: DEFUN ("process-kill-without-query", Fprocess_kill_without_query, ! 828: Sprocess_kill_without_query, 1, 2, 0, ! 829: "Say no query needed if PROCESS is running when Emacs is exited.\n\ ! 830: Optional second argument if non-nil says to require a query.\n\ ! 831: Value is t if a query was formerly required.") ! 832: (proc, value) ! 833: register Lisp_Object proc, value; ! 834: { ! 835: Lisp_Object tem; ! 836: CHECK_PROCESS (proc, 0); ! 837: tem = XPROCESS (proc)->kill_without_query; ! 838: XPROCESS (proc)->kill_without_query = Fnull (value); ! 839: return Fnull (tem); ! 840: } ! 841: ! 842: Lisp_Object ! 843: list_processes_1 () ! 844: { ! 845: register Lisp_Object tail, tem; ! 846: Lisp_Object proc, minspace, tem1; ! 847: register struct buffer *old = current_buffer; ! 848: register struct Lisp_Process *p; ! 849: register int state; ! 850: char tembuf[80]; ! 851: ! 852: XFASTINT (minspace) = 1; ! 853: ! 854: set_buffer_internal (XBUFFER (Vstandard_output)); ! 855: Fbuffer_flush_undo (Vstandard_output); ! 856: ! 857: current_buffer->truncate_lines = Qt; ! 858: ! 859: write_string ("\ ! 860: Proc Status Buffer Command\n\ ! 861: ---- ------ ------ -------\n", -1); ! 862: ! 863: for (tail = Vprocess_alist; !NULL (tail); tail = Fcdr (tail)) ! 864: { ! 865: Lisp_Object symbol; ! 866: ! 867: proc = Fcdr (Fcar (tail)); ! 868: p = XPROCESS (proc); ! 869: if (NULL (p->childp)) ! 870: continue; ! 871: ! 872: Finsert (1, &p->name); ! 873: Findent_to (make_number (13), minspace); ! 874: ! 875: if (!NULL (p->raw_status_low)) ! 876: update_status (p); ! 877: symbol = p->status; ! 878: if (XTYPE (p->status) == Lisp_Cons) ! 879: symbol = XCONS (p->status)->car; ! 880: ! 881: if (EQ (symbol, Qsignal)) ! 882: { ! 883: Lisp_Object tem; ! 884: tem = Fcar (Fcdr (p->status)); ! 885: if (XINT (tem) < NSIG) ! 886: write_string (sys_siglist [XINT (tem)], -1); ! 887: else ! 888: Fprinc (symbol, Qnil); ! 889: } ! 890: else if (NETCONN_P (proc)) ! 891: { ! 892: if (EQ (symbol, Qrun)) ! 893: write_string ("open", -1); ! 894: else if (EQ (symbol, Qexit)) ! 895: write_string ("closed", -1); ! 896: else ! 897: Fprinc (symbol, Qnil); ! 898: } ! 899: else ! 900: Fprinc (symbol, Qnil); ! 901: ! 902: if (EQ (symbol, Qexit)) ! 903: { ! 904: Lisp_Object tem; ! 905: tem = Fcar (Fcdr (p->status)); ! 906: if (XFASTINT (tem)) ! 907: { ! 908: sprintf (tembuf, " %d", XFASTINT (tem)); ! 909: write_string (tembuf, -1); ! 910: } ! 911: } ! 912: ! 913: if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) ! 914: remove_process (proc); ! 915: ! 916: Findent_to (make_number (22), minspace); ! 917: if (NULL (p->buffer)) ! 918: InsStr ("(none)"); ! 919: else if (NULL (XBUFFER (p->buffer)->name)) ! 920: InsStr ("(Killed)"); ! 921: else ! 922: Finsert (1, &XBUFFER (p->buffer)->name); ! 923: ! 924: Findent_to (make_number (37), minspace); ! 925: ! 926: if (NETCONN_P (proc)) ! 927: { ! 928: sprintf (tembuf, "(network stream connection to %s)\n", ! 929: XSTRING (p->childp)->data); ! 930: InsStr (tembuf); ! 931: } ! 932: else ! 933: { ! 934: tem = p->command; ! 935: while (1) ! 936: { ! 937: tem1 = Fcar (tem); ! 938: Finsert (1, &tem1); ! 939: tem = Fcdr (tem); ! 940: if (NULL (tem)) ! 941: break; ! 942: InsStr (" "); ! 943: } ! 944: InsStr ("\n"); ! 945: } ! 946: } ! 947: ! 948: return Qnil; ! 949: } ! 950: ! 951: DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", ! 952: "Display a list of all processes.\n\ ! 953: \(Any processes listed as Exited or Signaled are actually eliminated\n\ ! 954: after the listing is made.)") ! 955: () ! 956: { ! 957: internal_with_output_to_temp_buffer ("*Process List*", ! 958: list_processes_1, Qnil); ! 959: return Qnil; ! 960: } ! 961: ! 962: DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, ! 963: "Return a list of all processes.") ! 964: () ! 965: { ! 966: return Fmapcar (Qcdr, Vprocess_alist); ! 967: } ! 968: ! 969: DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, ! 970: "Start a program in a subprocess. Return the process object for it.\n\ ! 971: Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ ! 972: NAME is name for process. It is modified if necessary to make it unique.\n\ ! 973: BUFFER is the buffer or (buffer-name) to associate with the process.\n\ ! 974: Process output goes at end of that buffer, unless you specify\n\ ! 975: an output stream or filter function to handle the output.\n\ ! 976: BUFFER may be also nil, meaning that this process is not associated\n\ ! 977: with any buffer\n\ ! 978: Third arg is program file name. It is searched for as in the shell.\n\ ! 979: Remaining arguments are strings to give program as arguments.") ! 980: (nargs, args) ! 981: int nargs; ! 982: register Lisp_Object *args; ! 983: { ! 984: Lisp_Object buffer, name, program, proc, tem; ! 985: register unsigned char **new_argv; ! 986: register int i; ! 987: ! 988: buffer = args[1]; ! 989: if (!NULL (buffer)) ! 990: buffer = Fget_buffer_create (buffer); ! 991: ! 992: name = args[0]; ! 993: CHECK_STRING (name, 0); ! 994: ! 995: program = args[2]; ! 996: ! 997: CHECK_STRING (program, 2); ! 998: ! 999: new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); ! 1000: ! 1001: for (i = 3; i < nargs; i++) ! 1002: { ! 1003: tem = args[i]; ! 1004: CHECK_STRING (tem, i); ! 1005: new_argv[i - 2] = XSTRING (tem)->data; ! 1006: } ! 1007: new_argv[i - 2] = 0; ! 1008: new_argv[0] = XSTRING (program)->data; ! 1009: ! 1010: /* If program file name is not absolute, search our path for it */ ! 1011: if (new_argv[0][0] != '/') ! 1012: { ! 1013: tem = Qnil; ! 1014: openp (Vexec_path, program, "", &tem, 1); ! 1015: if (NULL (tem)) ! 1016: report_file_error ("Searching for program", Fcons (program, Qnil)); ! 1017: new_argv[0] = XSTRING (tem)->data; ! 1018: } ! 1019: ! 1020: proc = make_process (name); ! 1021: ! 1022: XPROCESS (proc)->childp = Qt; ! 1023: XPROCESS (proc)->command_channel_p = Qnil; ! 1024: XPROCESS (proc)->buffer = buffer; ! 1025: XPROCESS (proc)->sentinel = Qnil; ! 1026: XPROCESS (proc)->filter = Qnil; ! 1027: XPROCESS (proc)->command = Flist (nargs - 2, args + 2); ! 1028: ! 1029: create_process (proc, new_argv); ! 1030: ! 1031: return proc; ! 1032: } ! 1033: ! 1034: create_process_1 (signo) ! 1035: int signo; ! 1036: { ! 1037: #ifdef USG ! 1038: /* USG systems forget handlers when they are used; ! 1039: must reestablish each time */ ! 1040: signal (signo, create_process_1); ! 1041: #endif /* USG */ ! 1042: } ! 1043: ! 1044: #if 0 /* This doesn't work; see the note before sigchld_handler. */ ! 1045: #ifdef USG ! 1046: #ifdef SIGCHLD ! 1047: /* Mimic blocking of signals on system V, which doesn't really have it. */ ! 1048: ! 1049: /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ ! 1050: int sigchld_deferred; ! 1051: ! 1052: create_process_sigchld () ! 1053: { ! 1054: signal (SIGCHLD, create_process_sigchld); ! 1055: ! 1056: sigchld_deferred = 1; ! 1057: } ! 1058: #endif ! 1059: #endif ! 1060: #endif ! 1061: ! 1062: create_process (process, new_argv) ! 1063: Lisp_Object process; ! 1064: char **new_argv; ! 1065: { ! 1066: int pid, inchannel, outchannel, forkin, forkout; ! 1067: int sv[2]; ! 1068: #ifdef SIGCHLD ! 1069: int (*sigchld)(); ! 1070: #endif ! 1071: char **env; ! 1072: int pty_flag = 0; ! 1073: extern char **environ; ! 1074: ! 1075: #ifdef MAINTAIN_ENVIRONMENT ! 1076: env = (char **) alloca (size_of_current_environ ()); ! 1077: get_current_environ (env); ! 1078: #else ! 1079: env = environ; ! 1080: #endif /* MAINTAIN_ENVIRONMENT */ ! 1081: ! 1082: inchannel = outchannel = -1; ! 1083: ! 1084: #ifdef HAVE_PTYS ! 1085: if (EQ (Vprocess_connection_type, Qt)) ! 1086: outchannel = inchannel = allocate_pty (); ! 1087: ! 1088: if (inchannel >= 0) ! 1089: { ! 1090: #ifndef USG ! 1091: /* On USG systems it does not work to open ! 1092: the pty's tty here and then close and reopen it in the child. */ ! 1093: #ifdef O_NOCTTY ! 1094: /* Don't let this terminal become our controlling terminal ! 1095: (in case we don't have one). */ ! 1096: forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); ! 1097: #else ! 1098: forkout = forkin = open (pty_name, O_RDWR, 0); ! 1099: #endif ! 1100: if (forkin < 0) ! 1101: report_file_error ("Opening pty", Qnil); ! 1102: #else ! 1103: forkin = forkout = -1; ! 1104: #endif ! 1105: pty_flag = 1; ! 1106: } ! 1107: else ! 1108: #endif /* HAVE_PTYS */ ! 1109: #ifdef SKTPAIR ! 1110: { ! 1111: if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) ! 1112: report_file_error ("Opening socketpair", Qnil); ! 1113: outchannel = inchannel = sv[0]; ! 1114: forkout = forkin = sv[1]; ! 1115: } ! 1116: #else /* not SKTPAIR */ ! 1117: { ! 1118: int temp; ! 1119: temp = pipe (sv); ! 1120: if (temp < 0) goto io_failure; ! 1121: inchannel = sv[0]; ! 1122: forkout = sv[1]; ! 1123: temp = pipe (sv); ! 1124: if (temp < 0) goto io_failure; ! 1125: outchannel = sv[1]; ! 1126: forkin = sv[0]; ! 1127: } ! 1128: #endif /* not SKTPAIR */ ! 1129: ! 1130: #if 0 ! 1131: /* Replaced by close_process_descs */ ! 1132: set_exclusive_use (inchannel); ! 1133: set_exclusive_use (outchannel); ! 1134: #endif ! 1135: ! 1136: /* Stride people say it's a mystery why this is needed ! 1137: as well as the O_NDELAY, but that it fails without this. */ ! 1138: #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) ! 1139: { ! 1140: int one = 1; ! 1141: ioctl (inchannel, FIONBIO, &one); ! 1142: } ! 1143: #endif ! 1144: ! 1145: #ifdef O_NONBLOCK ! 1146: fcntl (inchannel, F_SETFL, O_NONBLOCK); ! 1147: #else ! 1148: #ifdef O_NDELAY ! 1149: fcntl (inchannel, F_SETFL, O_NDELAY); ! 1150: #endif ! 1151: #endif ! 1152: ! 1153: XFASTINT (XPROCESS (process)->infd) = inchannel; ! 1154: XFASTINT (XPROCESS (process)->outfd) = outchannel; ! 1155: /* Record the tty descriptor used in the subprocess. */ ! 1156: #ifdef SYSV4_PTYS ! 1157: /* On system V.4, if using a pty, we need to keep a descriptor ! 1158: for the tty that the inferior uses, in order to get the pgrp. ! 1159: If this uses too many descriptors, we could instead save the tty name ! 1160: and reopen it to send signals. */ ! 1161: if (pty_flag) ! 1162: { ! 1163: int temp = dup (forkin); ! 1164: if (temp < 0) goto io_failure; ! 1165: XFASTINT (XPROCESS (process)->subtty) = temp; ! 1166: } ! 1167: else ! 1168: #endif ! 1169: XPROCESS (process)->subtty = Qnil; ! 1170: XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); ! 1171: XPROCESS (process)->status = Qrun; ! 1172: /* Record this as an active process, with its channels. ! 1173: As a result, child_setup will close Emacs's side of the pipes. */ ! 1174: chan_process[inchannel] = process; ! 1175: ! 1176: /* Delay interrupts until we have a chance to store ! 1177: the new fork's pid in its process structure */ ! 1178: #ifdef SIGCHLD ! 1179: #ifdef BSD4_1 ! 1180: sighold (SIGCHLD); ! 1181: #else /* not BSD4_1 */ ! 1182: #ifdef HPUX ! 1183: sigsetmask (sigmask (SIGCHLD)); ! 1184: #else /* not HPUX */ ! 1185: #if defined (BSD) || defined (UNIPLUS) ! 1186: sigsetmask (sigmask (SIGCHLD)); ! 1187: #else /* ordinary USG */ ! 1188: #if 0 ! 1189: sigchld_deferred = 0; ! 1190: sigchld = (int (*)()) signal (SIGCHLD, create_process_sigchld); ! 1191: #endif ! 1192: #endif /* ordinary USG */ ! 1193: #endif /* not HPUX */ ! 1194: #endif /* not BSD4_1 */ ! 1195: #endif /* SIGCHLD */ ! 1196: ! 1197: /* Until we store the proper pid, enable sigchld_handler ! 1198: to recognize an unknown pid as standing for this process. */ ! 1199: XSETINT (XPROCESS (process)->pid, -1); ! 1200: /* Turn on the bit for our input from this process now, ! 1201: so that even if the process terminates very soon, ! 1202: we can clear the bit properly on termination. ! 1203: If fork fails, remove_process will clear the bit. */ ! 1204: FD_SET (inchannel, &input_wait_mask); ! 1205: ! 1206: { ! 1207: /* child_setup must clobber environ on systems with true vfork. ! 1208: Protect it from permanent change. */ ! 1209: char **save_environ = environ; ! 1210: ! 1211: pid = vfork (); ! 1212: if (pid == 0) ! 1213: { ! 1214: int xforkin = forkin; ! 1215: int xforkout = forkout; ! 1216: ! 1217: #if 0 /* This was probably a mistake--it duplicates code later on, ! 1218: but fails to handle all the cases. */ ! 1219: /* Make SIGCHLD work again in the child. */ ! 1220: sigsetmask (SIGEMPTYMASK); ! 1221: #endif ! 1222: ! 1223: /* Make the pty be the controlling terminal of the process. */ ! 1224: #ifdef HAVE_PTYS ! 1225: /* First, disconnect its current controlling terminal. */ ! 1226: #ifdef HAVE_SETSID ! 1227: setsid (); ! 1228: #ifdef TIOCSCTTY ! 1229: /* Make the pty's terminal the controlling terminal. */ ! 1230: if (pty_flag && (ioctl (xforkin, TIOCSCTTY, 0) < 0)) ! 1231: abort (); ! 1232: #endif ! 1233: #else /* not HAVE_SETSID */ ! 1234: #ifdef USG ! 1235: /* It's very important to call setpgrp() here and no time ! 1236: afterwards. Otherwise, we lose our controlling tty which ! 1237: is set when we open the pty. */ ! 1238: setpgrp (); ! 1239: #endif /* USG */ ! 1240: #endif /* not HAVE_SETSID */ ! 1241: #ifdef TIOCNOTTY ! 1242: /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you ! 1243: can do TIOCSPGRP only to the process's controlling tty. */ ! 1244: if (pty_flag) ! 1245: { ! 1246: /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? ! 1247: I can't test it since I don't have 4.3. */ ! 1248: int j = open ("/dev/tty", O_RDWR, 0); ! 1249: ioctl (j, TIOCNOTTY, 0); ! 1250: close (j); ! 1251: #ifndef USG ! 1252: /* In order to get a controlling terminal on some versions ! 1253: of BSD, it is necessary to put the process in pgrp 0 ! 1254: before it opens the terminal. */ ! 1255: setpgrp (0, 0); ! 1256: #endif ! 1257: } ! 1258: #endif /* TIOCNOTTY */ ! 1259: ! 1260: #if !defined (RTU) && !defined (UNIPLUS) ! 1261: /*** There is a suggestion that this ought to be a ! 1262: conditional on TIOCSPGRP. */ ! 1263: /* Now close the pty (if we had it open) and reopen it. ! 1264: This makes the pty the controlling terminal of the subprocess. */ ! 1265: if (pty_flag) ! 1266: { ! 1267: /* I wonder if close (open (pty_name, ...)) would work? */ ! 1268: if (xforkin >= 0) ! 1269: close (xforkin); ! 1270: xforkout = xforkin = open (pty_name, O_RDWR, 0); ! 1271: ! 1272: if (xforkin < 0) ! 1273: abort (); ! 1274: } ! 1275: #endif /* not UNIPLUS and not RTU */ ! 1276: #ifdef SETUP_SLAVE_PTY ! 1277: if (pty_flag) ! 1278: { ! 1279: SETUP_SLAVE_PTY; ! 1280: } ! 1281: #endif /* SETUP_SLAVE_PTY */ ! 1282: #ifdef AIX ! 1283: /* On AIX, we've disabled SIGHUP above once we start a child on a pty. ! 1284: Now reenable it in the child, so it will die when we want it to. */ ! 1285: if (pty_flag) ! 1286: signal (SIGHUP, SIG_DFL); ! 1287: #endif ! 1288: #endif /* HAVE_PTYS */ ! 1289: #ifdef SIGCHLD ! 1290: #ifdef BSD4_1 ! 1291: sigrelse (SIGCHLD); ! 1292: #else /* not BSD4_1 */ ! 1293: #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) ! 1294: sigsetmask (SIGEMPTYMASK); ! 1295: #else /* ordinary USG */ ! 1296: #if 0 ! 1297: signal (SIGCHLD, sigchld); ! 1298: #endif ! 1299: #endif /* ordinary USG */ ! 1300: #endif /* not BSD4_1 */ ! 1301: #endif /* SIGCHLD */ ! 1302: if (pty_flag) ! 1303: child_setup_tty (xforkout); ! 1304: child_setup (xforkin, xforkout, xforkout, new_argv, env); ! 1305: } ! 1306: environ = save_environ; ! 1307: } ! 1308: ! 1309: if (pid < 0) ! 1310: { ! 1311: remove_process (process); ! 1312: report_file_error ("Doing vfork", Qnil); ! 1313: } ! 1314: ! 1315: XFASTINT (XPROCESS (process)->pid) = pid; ! 1316: ! 1317: /* If the subfork execv fails, and it exits, ! 1318: this close hangs. I don't know why. ! 1319: So have an interrupt jar it loose. */ ! 1320: stop_polling (); ! 1321: signal (SIGALRM, create_process_1); ! 1322: alarm (1); ! 1323: if (forkin >= 0) ! 1324: close (forkin); ! 1325: alarm (0); ! 1326: start_polling (); ! 1327: if (forkin != forkout && forkout >= 0) ! 1328: close (forkout); ! 1329: ! 1330: #ifdef SIGCHLD ! 1331: #ifdef BSD4_1 ! 1332: sigrelse (SIGCHLD); ! 1333: #else /* not BSD4_1 */ ! 1334: #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) ! 1335: sigsetmask (SIGEMPTYMASK); ! 1336: #else /* ordinary USG */ ! 1337: #if 0 ! 1338: signal (SIGCHLD, sigchld); ! 1339: /* Now really handle any of these signals ! 1340: that came in during this function. */ ! 1341: if (sigchld_deferred) ! 1342: kill (getpid (), SIGCHLD); ! 1343: #endif ! 1344: #endif /* ordinary USG */ ! 1345: #endif /* not BSD4_1 */ ! 1346: #endif /* SIGCHLD */ ! 1347: return; ! 1348: ! 1349: io_failure: ! 1350: { ! 1351: int temp = errno; ! 1352: close (forkin); ! 1353: close (forkout); ! 1354: close (inchannel); ! 1355: close (outchannel); ! 1356: errno = temp; ! 1357: report_file_error ("Opening pty or pipe", Qnil); ! 1358: } ! 1359: } ! 1360: ! 1361: #ifdef HAVE_SOCKETS ! 1362: ! 1363: /* open a TCP network connection to a given HOST/SERVICE. Treated ! 1364: exactly like a normal process when reading and writing. Only ! 1365: differences are in status display and process deletion. A network ! 1366: connection has no PID; you cannot signal it. All you can do is ! 1367: deactivate and close it via delete-process */ ! 1368: ! 1369: DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, ! 1370: 4, 4, 0, ! 1371: "Open a TCP connection for a service to a host.\n\ ! 1372: Returns a subprocess-object to represent the connection.\n\ ! 1373: Input and output work as for subprocesses; `delete-process' closes it.\n\ ! 1374: Args are NAME BUFFER HOST SERVICE.\n\ ! 1375: NAME is name for process. It is modified if necessary to make it unique.\n\ ! 1376: BUFFER is the buffer (or buffer-name) to associate with the process.\n\ ! 1377: Process output goes at end of that buffer, unless you specify\n\ ! 1378: an output stream or filter function to handle the output.\n\ ! 1379: BUFFER may be also nil, meaning that this process is not associated\n\ ! 1380: with any buffer\n\ ! 1381: Third arg is name of the host to connect to.\n\ ! 1382: Fourth arg SERVICE is name of the service desired, or an integer\n\ ! 1383: specifying a port number to connect to.") ! 1384: (name, buffer, host, service) ! 1385: Lisp_Object name, buffer, host, service; ! 1386: { ! 1387: Lisp_Object proc; ! 1388: register int i; ! 1389: struct sockaddr_in address; ! 1390: struct servent *svc_info; ! 1391: struct hostent *host_info; ! 1392: int s, outch, inch; ! 1393: char errstring[80]; ! 1394: int port; ! 1395: struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; ! 1396: ! 1397: GCPRO4 (name, buffer, host, service); ! 1398: CHECK_STRING (name, 0); ! 1399: CHECK_STRING (host, 0); ! 1400: if (XTYPE (service) == Lisp_Int) ! 1401: port = htons ((unsigned short) XINT (service)); ! 1402: else ! 1403: { ! 1404: CHECK_STRING (service, 0); ! 1405: svc_info = getservbyname (XSTRING (service)->data, "tcp"); ! 1406: if (svc_info == 0) ! 1407: error ("Unknown service \"%s\"", XSTRING (service)->data); ! 1408: port = svc_info->s_port; ! 1409: } ! 1410: ! 1411: bzero (&address, sizeof address); ! 1412: address.sin_addr.s_addr = inet_addr (XSTRING (host)->data); ! 1413: if (address.sin_addr.s_addr != -1) ! 1414: address.sin_family = AF_INET; ! 1415: else ! 1416: { ! 1417: host_info = gethostbyname (XSTRING (host)->data); ! 1418: if (host_info == 0) ! 1419: error ("Unknown host \"%s\"", XSTRING (host)->data); ! 1420: bcopy (host_info->h_addr, (char *) &address.sin_addr, host_info->h_length); ! 1421: address.sin_family = host_info->h_addrtype; ! 1422: } ! 1423: address.sin_port = port; ! 1424: ! 1425: s = socket (address.sin_family, SOCK_STREAM, 0); ! 1426: if (s < 0) ! 1427: report_file_error ("error creating socket", Fcons (name, Qnil)); ! 1428: ! 1429: /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) ! 1430: when connect is interrupted. So let's not let it get interrupted. */ ! 1431: if (interrupt_input) ! 1432: unrequest_sigio (); ! 1433: stop_polling (); ! 1434: ! 1435: while (1) ! 1436: { ! 1437: int value = connect (s, &address, sizeof address); ! 1438: /* Continue if successeful. */ ! 1439: if (value != -1) ! 1440: break; ! 1441: /* Report a "real" error. */ ! 1442: if (errno != EINTR) ! 1443: { ! 1444: close (s); ! 1445: error ("Host \"%s\" not responding", XSTRING (host)->data); ! 1446: } ! 1447: /* Loop around after temporary error. */ ! 1448: } ! 1449: ! 1450: if (interrupt_input) ! 1451: request_sigio (); ! 1452: start_polling (); ! 1453: ! 1454: inch = s; ! 1455: outch = dup (s); ! 1456: if (outch < 0) ! 1457: report_file_error ("error duplicating socket", Fcons (name, Qnil)); ! 1458: ! 1459: if (!NULL (buffer)) ! 1460: buffer = Fget_buffer_create (buffer); ! 1461: proc = make_process (name); ! 1462: ! 1463: chan_process[inch] = proc; ! 1464: ! 1465: #ifdef O_NONBLOCK ! 1466: fcntl (inch, F_SETFL, O_NONBLOCK); ! 1467: #else ! 1468: #ifdef O_NDELAY ! 1469: fcntl (inch, F_SETFL, O_NDELAY); ! 1470: #endif ! 1471: #endif ! 1472: ! 1473: XPROCESS (proc)->childp = host; ! 1474: XPROCESS (proc)->command_channel_p = Qnil; ! 1475: XPROCESS (proc)->buffer = buffer; ! 1476: XPROCESS (proc)->sentinel = Qnil; ! 1477: XPROCESS (proc)->filter = Qnil; ! 1478: XPROCESS (proc)->command = Qnil; ! 1479: XPROCESS (proc)->pid = Qnil; ! 1480: XPROCESS (proc)->kill_without_query = Qt; ! 1481: XFASTINT (XPROCESS (proc)->infd) = s; ! 1482: XFASTINT (XPROCESS (proc)->outfd) = outch; ! 1483: XPROCESS (proc)->status = Qrun; ! 1484: FD_SET (inch, &input_wait_mask); ! 1485: ! 1486: UNGCPRO; ! 1487: return proc; ! 1488: } ! 1489: #endif /* HAVE_SOCKETS */ ! 1490: ! 1491: deactivate_process (proc) ! 1492: Lisp_Object proc; ! 1493: { ! 1494: register int inchannel, outchannel; ! 1495: register struct Lisp_Process *p = XPROCESS (proc); ! 1496: ! 1497: inchannel = XFASTINT (p->infd); ! 1498: outchannel = XFASTINT (p->outfd); ! 1499: ! 1500: if (inchannel) ! 1501: { ! 1502: /* Beware SIGCHLD hereabouts. */ ! 1503: flush_pending_output (inchannel); ! 1504: close (inchannel); ! 1505: if (outchannel && outchannel != inchannel) ! 1506: close (outchannel); ! 1507: ! 1508: XFASTINT (p->infd) = 0; ! 1509: XFASTINT (p->outfd) = 0; ! 1510: chan_process[inchannel] = Qnil; ! 1511: FD_CLR (inchannel, &input_wait_mask); ! 1512: } ! 1513: } ! 1514: ! 1515: /* Close all descriptors currently in use for communication ! 1516: with subprocess. This is used in a newly-forked subprocess ! 1517: to get rid of irrelevant descriptors. */ ! 1518: ! 1519: close_process_descs () ! 1520: { ! 1521: int i; ! 1522: for (i = 0; i < MAXDESC; i++) ! 1523: { ! 1524: Lisp_Object process; ! 1525: process = chan_process[i]; ! 1526: if (!NULL (process)) ! 1527: { ! 1528: int in = XFASTINT (XPROCESS (process)->infd); ! 1529: int out = XFASTINT (XPROCESS (process)->outfd); ! 1530: ! 1531: if (in != 0) ! 1532: close (in); ! 1533: if (out != 0 && out != in) ! 1534: close (out); ! 1535: if (!NULL (XPROCESS (process)->subtty)) ! 1536: close (XFASTINT (XPROCESS (process)->subtty)); ! 1537: } ! 1538: } ! 1539: } ! 1540: ! 1541: DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, ! 1542: 0, 1, 0, ! 1543: "Allow any pending output from subprocesses to be read by Emacs.\n\ ! 1544: It is read into the process' buffers or given to their filter functions.\n\ ! 1545: Non-nil arg PROCESS means do not return until some output has been received\n\ ! 1546: from PROCESS.") ! 1547: (proc) ! 1548: register Lisp_Object proc; ! 1549: { ! 1550: if (NULL (proc)) ! 1551: wait_reading_process_input (-1, 0, 0); ! 1552: else ! 1553: { ! 1554: proc = get_process (proc); ! 1555: wait_reading_process_input (0, XPROCESS (proc), 0); ! 1556: } ! 1557: return Qnil; ! 1558: } ! 1559: ! 1560: /* This variable is different from waiting_for_input in keyboard.c. ! 1561: It is used to communicate to a lisp process-filter/sentinel (via the ! 1562: function Fwaiting_for_user_input_p below) whether emacs was waiting ! 1563: for user-input when that process-filter was called. ! 1564: waiting_for_input cannot be used as that is by definition 0 when ! 1565: lisp code is being evalled */ ! 1566: static int waiting_for_user_input_p; ! 1567: ! 1568: /* Read and dispose of subprocess output ! 1569: while waiting for timeout to elapse and/or keyboard input to be available. ! 1570: ! 1571: time_limit is the timeout in seconds, or zero for no limit. ! 1572: -1 means gobble data available immediately but don't wait for any. ! 1573: ! 1574: read_kbd is 1 to return when input is available. ! 1575: -1 means caller will actually read the input. ! 1576: A pointer to a struct Lisp_Process means wait until ! 1577: something arrives from that process. ! 1578: ! 1579: do_display means redisplay should be done to show ! 1580: subprocess output that arrives. */ ! 1581: ! 1582: wait_reading_process_input (time_limit, read_kbd, do_display) ! 1583: int time_limit, read_kbd, do_display; ! 1584: { ! 1585: register int channel, nfds, m; ! 1586: SELECT_TYPE Available; ! 1587: SELECT_TYPE Exception; ! 1588: int xerrno; ! 1589: Lisp_Object proc; ! 1590: #ifdef HAVE_TIMEVAL ! 1591: struct timeval timeout, end_time, garbage; ! 1592: #else ! 1593: long timeout, end_time, temp; ! 1594: #endif /* not HAVE_TIMEVAL */ ! 1595: SELECT_TYPE Atemp; ! 1596: int wait_channel = 0; ! 1597: struct Lisp_Process *wait_proc = 0; ! 1598: extern kbd_count; ! 1599: ! 1600: /* Detect when read_kbd is really the address of a Lisp_Process. */ ! 1601: if (read_kbd > 10 || read_kbd < -1) ! 1602: { ! 1603: wait_proc = (struct Lisp_Process *) read_kbd; ! 1604: wait_channel = XFASTINT (wait_proc->infd); ! 1605: read_kbd = 0; ! 1606: } ! 1607: waiting_for_user_input_p = read_kbd; ! 1608: ! 1609: /* Since we may need to wait several times, ! 1610: compute the absolute time to return at. */ ! 1611: if (time_limit) ! 1612: { ! 1613: #ifdef HAVE_TIMEVAL ! 1614: gettimeofday (&end_time, &garbage); ! 1615: end_time.tv_sec += time_limit; ! 1616: #else /* not HAVE_TIMEVAL */ ! 1617: time (&end_time); ! 1618: end_time += time_limit; ! 1619: #endif /* not HAVE_TIMEVAL */ ! 1620: } ! 1621: ! 1622: #if 0 /* Select emulator claims to preserve alarms. ! 1623: And there are many ways to get out of this function by longjmp. */ ! 1624: /* Turn off periodic alarms (in case they are in use) ! 1625: because the select emulator uses alarms. */ ! 1626: stop_polling (); ! 1627: #endif ! 1628: ! 1629: while (1) ! 1630: { ! 1631: /* If calling from keyboard input, do not quit ! 1632: since we want to return C-g as an input character. ! 1633: Otherwise, do pending quit if requested. */ ! 1634: if (read_kbd >= 0) ! 1635: { ! 1636: #if 0 ! 1637: /* This is the same condition tested by QUIT. ! 1638: We need to resume polling if we are going to quit. */ ! 1639: if (!NULL (Vquit_flag) && NULL (Vinhibit_quit)) ! 1640: { ! 1641: start_polling (); ! 1642: QUIT; ! 1643: } ! 1644: #endif ! 1645: QUIT; ! 1646: } ! 1647: ! 1648: /* If status of something has changed, and no input is available, ! 1649: notify the user of the change right away */ ! 1650: if (update_tick != process_tick && do_display) ! 1651: { ! 1652: Atemp = input_wait_mask; ! 1653: #ifdef HAVE_TIMEVAL ! 1654: timeout.tv_sec=0; timeout.tv_usec=0; ! 1655: #else /* not HAVE_TIMEVAL */ ! 1656: timeout = 0; ! 1657: #endif /* not HAVE_TIMEVAL */ ! 1658: if (select (MAXDESC, &Atemp, 0, 0, &timeout) <= 0) ! 1659: status_notify (); ! 1660: } ! 1661: ! 1662: /* Don't wait for output from a non-running process. */ ! 1663: if (wait_proc != 0 && !NULL (wait_proc->raw_status_low)) ! 1664: update_status (wait_proc); ! 1665: if (wait_proc != 0 ! 1666: && ! EQ (wait_proc->status, Qrun)) ! 1667: break; ! 1668: ! 1669: if (fix_screen_hook) ! 1670: (*fix_screen_hook) (); ! 1671: ! 1672: /* Compute time from now till when time limit is up */ ! 1673: /* Exit if already run out */ ! 1674: if (time_limit == -1) ! 1675: { ! 1676: /* -1 specified for timeout means ! 1677: gobble output available now ! 1678: but don't wait at all. */ ! 1679: #ifdef HAVE_TIMEVAL ! 1680: timeout.tv_sec = 0; ! 1681: timeout.tv_usec = 0; ! 1682: #else ! 1683: timeout = 0; ! 1684: #endif /* not HAVE_TIMEVAL */ ! 1685: } ! 1686: else if (time_limit) ! 1687: { ! 1688: #ifdef HAVE_TIMEVAL ! 1689: gettimeofday (&timeout, &garbage); ! 1690: ! 1691: /* In effect, timeout = end_time - timeout. ! 1692: Break if result would be negative. */ ! 1693: if (timeval_subtract (&timeout, end_time, timeout)) ! 1694: break; ! 1695: #else /* not HAVE_TIMEVAL */ ! 1696: time (&temp); ! 1697: timeout = end_time - temp; ! 1698: if (timeout < 0) ! 1699: break; ! 1700: #endif /* not HAVE_TIMEVAL */ ! 1701: } ! 1702: else ! 1703: { ! 1704: #ifdef HAVE_TIMEVAL ! 1705: /* If no real timeout, loop sleeping with a big timeout ! 1706: so that input interrupt can wake us up by zeroing it */ ! 1707: timeout.tv_sec = 100; ! 1708: timeout.tv_usec = 0; ! 1709: #else /* not HAVE_TIMEVAL */ ! 1710: timeout = 100000; /* 100000 recognized by the select emulator */ ! 1711: #endif /* not HAVE_TIMEVAL */ ! 1712: } ! 1713: ! 1714: /* Cause quitting and alarm signals to take immediate action, ! 1715: and cause input available signals to zero out timeout */ ! 1716: if (read_kbd < 0) ! 1717: set_waiting_for_input (&timeout); ! 1718: ! 1719: /* Wait till there is something to do */ ! 1720: ! 1721: Available = Exception = input_wait_mask; ! 1722: if (!read_kbd) ! 1723: FD_CLR (0, &Available); ! 1724: ! 1725: if (read_kbd && kbd_count) ! 1726: nfds = 0; ! 1727: else ! 1728: /* Since we don't do anything abt Exceptions, ! 1729: let's notw wake up for them. */ ! 1730: nfds = select (MAXDESC, &Available, 0, 0, &timeout); ! 1731: #if 0 ! 1732: #ifdef IBMRTAIX ! 1733: nfds = select (MAXDESC, &Available, 0, 0, &timeout); ! 1734: #else ! 1735: #ifdef HPUX ! 1736: nfds = select (MAXDESC, &Available, 0, 0, &timeout); ! 1737: #else ! 1738: nfds = select (MAXDESC, &Available, 0, &Exception, &timeout); ! 1739: #endif ! 1740: #endif ! 1741: #endif /* 0 */ ! 1742: xerrno = errno; ! 1743: ! 1744: if (fix_screen_hook) ! 1745: (*fix_screen_hook) (); ! 1746: ! 1747: /* Make C-g and alarm signals set flags again */ ! 1748: clear_waiting_for_input (); ! 1749: ! 1750: /* If we woke up due to SIGWINCH, actually change size now. */ ! 1751: if (read_kbd) ! 1752: do_pending_window_change (); ! 1753: ! 1754: if (time_limit && nfds == 0) /* timeout elapsed */ ! 1755: break; ! 1756: if (nfds < 0) ! 1757: { ! 1758: if (xerrno == EINTR) ! 1759: FD_ZERO (&Available); ! 1760: #ifdef ALLIANT ! 1761: /* This happens for no known reason on ALLIANT. ! 1762: I am guessing that this is the right response. -- RMS. */ ! 1763: else if (xerrno == EFAULT) ! 1764: FD_ZERO (&Available); ! 1765: #endif ! 1766: else if (xerrno == EBADF) ! 1767: #ifdef AIX ! 1768: /* AIX will return EBADF on a call to select involving a ptc if the ! 1769: associated pts isn't open. Since this will only happen just as ! 1770: a child is dying, just ignore the situation -- SIGCHLD will come ! 1771: along quite quickly, and after cleanup the ptc will no longer be ! 1772: checked, so this error will stop recurring. */ ! 1773: FD_ZERO (&Available); /* Cannot depend on values returned. */ ! 1774: #else /* not AIX */ ! 1775: abort (); ! 1776: #endif /* not AIX */ ! 1777: else ! 1778: error("select error: %s", sys_errlist[xerrno]); ! 1779: } ! 1780: #ifdef SIGIO ! 1781: #if defined (sun) || defined (APOLLO) ! 1782: else if (nfds > 0 && FD_ISSET (0, &Available) && interrupt_input) ! 1783: /* System sometimes fails to deliver SIGIO. */ ! 1784: kill (getpid (), SIGIO); ! 1785: #endif ! 1786: #endif ! 1787: ! 1788: /* Check for keyboard input */ ! 1789: /* If there is any, return immediately ! 1790: to give it higher priority than subprocesses */ ! 1791: ! 1792: if (read_kbd && detect_input_pending ()) ! 1793: break; ! 1794: ! 1795: /* If checking input just got us a size-change event from X, ! 1796: obey it now if we should. */ ! 1797: if (read_kbd) ! 1798: do_pending_window_change (); ! 1799: ! 1800: /* If screen size has changed, redisplay now ! 1801: for either sit-for or keyboard input. */ ! 1802: if (read_kbd && screen_garbaged) ! 1803: redisplay_preserve_echo_area (); ! 1804: ! 1805: #ifdef vipc ! 1806: /* Check for connection from other process */ ! 1807: ! 1808: if (FD_ISSET (comm_server, &Available)) ! 1809: { ! 1810: FD_CLR (comm_server, &Available); ! 1811: create_commchan (); ! 1812: } ! 1813: #endif /* vipc */ ! 1814: ! 1815: /* Check for data from a process or a command channel */ ! 1816: ! 1817: for (channel = 3; channel < MAXDESC; channel++) ! 1818: { ! 1819: if (FD_ISSET (channel, &Available)) ! 1820: { ! 1821: int nread; ! 1822: ! 1823: FD_CLR (channel, &Available); ! 1824: /* If waiting for this channel, ! 1825: arrange to return as soon as no more input ! 1826: to be processed. No more waiting. */ ! 1827: if (wait_channel == channel) ! 1828: { ! 1829: wait_channel = 0; ! 1830: time_limit = -1; ! 1831: } ! 1832: proc = chan_process[channel]; ! 1833: if (NULL (proc)) ! 1834: continue; ! 1835: ! 1836: #ifdef vipc ! 1837: /* It's a command channel */ ! 1838: if (!NULL (XPROCESS (proc)->command_channel_p)) ! 1839: { ! 1840: ProcessCommChan (channel, proc); ! 1841: if (NULL (XPROCESS (proc)->command_channel_p)) ! 1842: { ! 1843: /* It has ceased to be a command channel! */ ! 1844: int bytes_available; ! 1845: if (ioctl (channel, FIONREAD, &bytes_available) < 0) ! 1846: bytes_available = 0; ! 1847: if (bytes_available) ! 1848: FD_SET (channel, &Available); ! 1849: } ! 1850: continue; ! 1851: } ! 1852: #endif /* vipc */ ! 1853: ! 1854: /* Read data from the process, starting with our ! 1855: buffered-ahead character if we have one. */ ! 1856: ! 1857: nread = read_process_output (proc, channel); ! 1858: if (nread > 0) ! 1859: { ! 1860: /* Since read_process_output can run a filter, ! 1861: which can call accept-process-output, ! 1862: don't try to read from any other processes ! 1863: before doing the select again. */ ! 1864: FD_ZERO (&Available); ! 1865: ! 1866: if (do_display) ! 1867: redisplay_preserve_echo_area (); ! 1868: } ! 1869: #ifdef EWOULDBLOCK ! 1870: else if (nread == -1 && errno == EWOULDBLOCK) ! 1871: ; ! 1872: #else ! 1873: #ifdef O_NONBLOCK ! 1874: else if (nread == -1 && errno == EAGAIN) ! 1875: ; ! 1876: #else ! 1877: #ifdef O_NDELAY ! 1878: else if (nread == -1 && errno == EAGAIN) ! 1879: ; ! 1880: /* Note that we cannot distinguish between no input ! 1881: available now and a closed pipe. ! 1882: With luck, a closed pipe will be accompanied by ! 1883: subprocess termination and SIGCHLD. */ ! 1884: else if (nread == 0 && !NETCONN_P (proc)) ! 1885: ; ! 1886: #endif /* O_NDELAY */ ! 1887: #endif /* O_NONBLOCK */ ! 1888: #endif /* EWOULDBLOCK */ ! 1889: #ifdef HAVE_PTYS ! 1890: /* On some OSs with ptys, when the process on one end of ! 1891: a pty exits, the other end gets an error reading with ! 1892: errno = EIO instead of getting an EOF (0 bytes read). ! 1893: Therefore, if we get an error reading and errno = ! 1894: EIO, just continue, because the child process has ! 1895: exited and should clean itself up soon (e.g. when we ! 1896: get a SIGCHLD). */ ! 1897: else if (nread == -1 && errno == EIO && !NETCONN_P (proc)) ! 1898: ; ! 1899: #endif /* HAVE_PTYS */ ! 1900: /* If we can detect process termination, don't consider the process ! 1901: gone just because its pipe is closed. */ ! 1902: #ifdef SIGCHLD ! 1903: else if (nread == 0 && !NETCONN_P (proc)) ! 1904: ; ! 1905: #endif ! 1906: else ! 1907: { ! 1908: /* Preserve status of processes already terminated. */ ! 1909: XSETINT (XPROCESS (proc)->tick, ++process_tick); ! 1910: deactivate_process (proc); ! 1911: if (!NULL (XPROCESS (proc)->raw_status_low)) ! 1912: update_status (XPROCESS (proc)); ! 1913: if (EQ (XPROCESS (proc)->status, Qrun)) ! 1914: XPROCESS (proc)->status ! 1915: = Fcons (Qexit, Fcons (make_number (256), Qnil)); ! 1916: } ! 1917: } ! 1918: } /* end for */ ! 1919: } /* end while */ ! 1920: ! 1921: /* If calling from keyboard input, do not quit ! 1922: since we want to return C-g as an input character. ! 1923: Otherwise, do pending quit if requested. */ ! 1924: if (read_kbd >= 0) ! 1925: { ! 1926: /* Prevent input_pending from remaining set if we quit. */ ! 1927: clear_input_pending (); ! 1928: QUIT; ! 1929: } ! 1930: } ! 1931: ! 1932: /* Actually call the filter. This gets the information via variables ! 1933: because internal_condition_case won't pass arguments. */ ! 1934: ! 1935: Lisp_Object ! 1936: run_filter () ! 1937: { ! 1938: return call2 (this_filter, filter_process, filter_string); ! 1939: } ! 1940: ! 1941: /* Read pending output from the process channel, ! 1942: starting with our buffered-ahead character if we have one. ! 1943: Yield number of characters read. ! 1944: ! 1945: This function reads at most 1024 characters. ! 1946: If you want to read all available subprocess output, ! 1947: you must call it repeatedly until it returns zero. */ ! 1948: ! 1949: read_process_output (proc, channel) ! 1950: Lisp_Object proc; ! 1951: register int channel; ! 1952: { ! 1953: register int nchars; ! 1954: char chars[1024]; ! 1955: register Lisp_Object outstream; ! 1956: register struct buffer *old = current_buffer; ! 1957: register struct Lisp_Process *p = XPROCESS (proc); ! 1958: register int opoint; ! 1959: ! 1960: if (proc_buffered_char[channel] < 0) ! 1961: nchars = read (channel, chars, sizeof chars); ! 1962: else ! 1963: { ! 1964: chars[0] = proc_buffered_char[channel]; ! 1965: proc_buffered_char[channel] = -1; ! 1966: nchars = read (channel, chars + 1, sizeof chars - 1); ! 1967: if (nchars < 0) ! 1968: nchars = 1; ! 1969: else ! 1970: nchars = nchars + 1; ! 1971: } ! 1972: ! 1973: if (nchars <= 0) return nchars; ! 1974: ! 1975: outstream = p->filter; ! 1976: if (!NULL (outstream)) ! 1977: { ! 1978: int count = specpdl_ptr - specpdl; ! 1979: specbind (Qinhibit_quit, Qt); ! 1980: this_filter = outstream; ! 1981: filter_process = proc; ! 1982: filter_string = make_string (chars, nchars); ! 1983: call2 (this_filter, filter_process, filter_string); ! 1984: /* internal_condition_case (run_filter, Qerror, Fidentity); */ ! 1985: unbind_to (count); ! 1986: return nchars; ! 1987: } ! 1988: ! 1989: /* If no filter, write into buffer if it isn't dead. */ ! 1990: if (!NULL (p->buffer) && !NULL (XBUFFER (p->buffer)->name)) ! 1991: { ! 1992: Lisp_Object tem; ! 1993: ! 1994: Fset_buffer (p->buffer); ! 1995: opoint = point; ! 1996: ! 1997: /* Insert new output into buffer ! 1998: at the current end-of-output marker, ! 1999: thus preserving logical ordering of input and output. */ ! 2000: if (XMARKER (p->mark)->buffer) ! 2001: SET_PT (marker_position (p->mark)); ! 2002: else ! 2003: SET_PT (ZV); ! 2004: if (point <= opoint) ! 2005: opoint += nchars; ! 2006: ! 2007: tem = current_buffer->read_only; ! 2008: current_buffer->read_only = Qnil; ! 2009: insert (chars, nchars); ! 2010: current_buffer->read_only = tem; ! 2011: Fset_marker (p->mark, make_number (point), p->buffer); ! 2012: update_mode_lines++; ! 2013: ! 2014: SET_PT (opoint); ! 2015: set_buffer_internal (old); ! 2016: } ! 2017: return nchars; ! 2018: } ! 2019: ! 2020: DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, ! 2021: 0, 0, 0, ! 2022: "Returns non-NIL if emacs is waiting for input from the user.\n\ ! 2023: This is intended for use by asynchronous process output filters and sentinels.") ! 2024: () ! 2025: { ! 2026: return ((waiting_for_user_input_p) ? Qt : Qnil); ! 2027: } ! 2028: ! 2029: /* Sending data to subprocess */ ! 2030: ! 2031: jmp_buf send_process_frame; ! 2032: ! 2033: send_process_trap () ! 2034: { ! 2035: #ifdef BSD4_1 ! 2036: sigrelse (SIGPIPE); ! 2037: sigrelse (SIGALRM); ! 2038: #endif /* BSD4_1 */ ! 2039: longjmp (send_process_frame, 1); ! 2040: } ! 2041: ! 2042: send_process (proc, buf, len) ! 2043: Lisp_Object proc; ! 2044: char *buf; ! 2045: int len; ! 2046: { ! 2047: /* Don't use register vars; longjmp can lose them. */ ! 2048: int rv; ! 2049: unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; ! 2050: ! 2051: if (!NULL (XPROCESS (proc)->raw_status_low)) ! 2052: update_status (XPROCESS (proc)); ! 2053: if (! EQ (XPROCESS (proc)->status, Qrun)) ! 2054: error ("Process %s not running", procname); ! 2055: ! 2056: if (!setjmp (send_process_frame)) ! 2057: while (len > 0) ! 2058: { ! 2059: signal (SIGPIPE, send_process_trap); ! 2060: rv = write (XFASTINT (XPROCESS (proc)->outfd), buf, len); ! 2061: signal (SIGPIPE, SIG_DFL); ! 2062: if (rv < 0) ! 2063: { ! 2064: if (0 ! 2065: #ifdef EWOULDBLOCK ! 2066: || errno == EWOULDBLOCK ! 2067: #endif ! 2068: #ifdef EAGAIN ! 2069: || errno == EAGAIN ! 2070: #endif ! 2071: ) ! 2072: { ! 2073: /* It would be nice to accept process output here, ! 2074: but that is difficult. For example, it could ! 2075: garbage what we are sending if that is from a buffer. */ ! 2076: immediate_quit = 1; ! 2077: QUIT; ! 2078: sleep (1); ! 2079: immediate_quit = 0; ! 2080: continue; ! 2081: } ! 2082: report_file_error ("writing to process", Fcons (proc, Qnil)); ! 2083: } ! 2084: buf += rv; ! 2085: len -= rv; ! 2086: } ! 2087: else ! 2088: { ! 2089: XPROCESS (proc)->raw_status_low = Qnil; ! 2090: XPROCESS (proc)->raw_status_high = Qnil; ! 2091: XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); ! 2092: XSETINT (XPROCESS (proc)->tick, ++process_tick); ! 2093: deactivate_process (proc); ! 2094: error ("SIGPIPE raised on process %s; closed it", procname); ! 2095: } ! 2096: } ! 2097: ! 2098: DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, ! 2099: 3, 3, 0, ! 2100: "Send current contents of region as input to PROCESS.\n\ ! 2101: PROCESS may be a process name.\n\ ! 2102: Called from program, takes three arguments, PROCESS, START and END.") ! 2103: (process, start, end) ! 2104: Lisp_Object process, start, end; ! 2105: { ! 2106: Lisp_Object proc; ! 2107: int start1; ! 2108: ! 2109: proc = get_process (process); ! 2110: validate_region (&start, &end); ! 2111: ! 2112: if (XINT (start) < GPT && XINT (end) > GPT) ! 2113: move_gap (start); ! 2114: ! 2115: start1 = XINT (start); ! 2116: send_process (proc, &FETCH_CHAR (start1), XINT (end) - XINT (start)); ! 2117: ! 2118: return Qnil; ! 2119: } ! 2120: ! 2121: DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, ! 2122: 2, 2, 0, ! 2123: "Send PROCESS the contents of STRING as input.\n\ ! 2124: PROCESS may be a process name.") ! 2125: (process, string) ! 2126: Lisp_Object process, string; ! 2127: { ! 2128: Lisp_Object proc; ! 2129: CHECK_STRING (string, 1); ! 2130: proc = get_process (process); ! 2131: send_process (proc, XSTRING (string)->data, XSTRING (string)->size); ! 2132: return Qnil; ! 2133: } ! 2134: ! 2135: /* send a signal number SIGNO to PROCESS. ! 2136: CURRENT_GROUP means send to the process group that currently owns ! 2137: the terminal being used to communicate with PROCESS. ! 2138: This is used for various commands in shell mode. ! 2139: If NOMSG is zero, insert signal-announcements into process's buffers ! 2140: right away. */ ! 2141: ! 2142: process_send_signal (process, signo, current_group, nomsg) ! 2143: Lisp_Object process; ! 2144: int signo; ! 2145: Lisp_Object current_group; ! 2146: int nomsg; ! 2147: { ! 2148: Lisp_Object proc; ! 2149: register struct Lisp_Process *p; ! 2150: int gid; ! 2151: int no_pgrp = 0; ! 2152: ! 2153: proc = get_process (process); ! 2154: p = XPROCESS (proc); ! 2155: ! 2156: if (!EQ (p->childp, Qt)) ! 2157: error ("Process %s is not a subprocess", ! 2158: XSTRING (p->name)->data); ! 2159: if (!XFASTINT (p->infd)) ! 2160: error ("Process %s is not active", ! 2161: XSTRING (p->name)->data); ! 2162: ! 2163: if (NULL (p->pty_flag)) ! 2164: current_group = Qnil; ! 2165: ! 2166: #ifdef TIOCGPGRP /* Not sure about this! (fnf) */ ! 2167: /* If we are using pgrps, get a pgrp number and make it negative. */ ! 2168: if (!NULL (current_group)) ! 2169: { ! 2170: /* If possible, send signals to the entire pgrp ! 2171: by sending an input character to it. */ ! 2172: #ifndef SIGNALS_VIA_CHARACTERS ! 2173: #if defined (TIOCGLTC) && defined (TIOCGETC) ! 2174: struct tchars c; ! 2175: struct ltchars lc; ! 2176: ! 2177: switch (signo) ! 2178: { ! 2179: case SIGINT: ! 2180: ioctl (XFASTINT (p->infd), TIOCGETC, &c); ! 2181: send_process (proc, &c.t_intrc, 1); ! 2182: return Qnil; ! 2183: case SIGQUIT: ! 2184: ioctl (XFASTINT (p->infd), TIOCGETC, &c); ! 2185: send_process (proc, &c.t_quitc, 1); ! 2186: return Qnil; ! 2187: #ifdef SIGTSTP ! 2188: case SIGTSTP: ! 2189: ioctl (XFASTINT (p->infd), TIOCGLTC, &lc); ! 2190: send_process (proc, &lc.t_suspc, 1); ! 2191: return Qnil; ! 2192: #endif ! 2193: } ! 2194: #endif /* have TIOCGLTC and have TIOCGETC */ ! 2195: #endif /* not SIGNALS_VIA_CHARACTERS */ ! 2196: /* It is possible that the following code would work ! 2197: on other kinds of USG systems, not just on the IRIS. ! 2198: This should be tried in Emacs 19. */ ! 2199: #ifdef SIGNALS_VIA_CHARACTERS ! 2200: struct termio t; ! 2201: switch (signo) ! 2202: { ! 2203: case SIGINT: ! 2204: ioctl (XFASTINT (p->infd), TCGETA, &t); ! 2205: send_process (proc, &t.c_cc[VINTR], 1); ! 2206: return Qnil; ! 2207: case SIGQUIT: ! 2208: ioctl (XFASTINT (p->infd), TCGETA, &t); ! 2209: send_process (proc, &t.c_cc[VQUIT], 1); ! 2210: return Qnil; ! 2211: #ifdef SIGTSTP ! 2212: case SIGTSTP: ! 2213: ioctl (XFASTINT (p->infd), TCGETA, &t); ! 2214: send_process (proc, &t.c_cc[VSWTCH], 1); ! 2215: return Qnil; ! 2216: #endif ! 2217: } ! 2218: #endif /* SIGNALS_VIA_CHARACTERS */ ! 2219: ! 2220: /* Get the pgrp using the tty itself, if we have that. ! 2221: Otherwise, use the pty to get the pgrp. */ ! 2222: #if defined (pfa) ! 2223: /* TICGPGRP symbol defined in sys/ioctl.h at E50. ! 2224: But, TIOCGPGRP does not work on E50. ! 2225: This way, we will use -1, since the ioctl won't change it. ! 2226: ([email protected].) */ ! 2227: gid = -1; ! 2228: #endif ! 2229: if (!NULL (p->subtty)) ! 2230: ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); ! 2231: else ! 2232: ioctl (XFASTINT (p->infd), TIOCGPGRP, &gid); ! 2233: if (gid == -1) ! 2234: no_pgrp = 1; ! 2235: else ! 2236: gid = - gid; ! 2237: } ! 2238: else ! 2239: gid = - XFASTINT (p->pid); ! 2240: #else /* not using pgrps */ ! 2241: /* Can't select pgrps on this system, so we know that ! 2242: the child itself heads the pgrp. */ ! 2243: gid = - XFASTINT (p->pid); ! 2244: #endif /* not using pgrps */ ! 2245: ! 2246: switch (signo) ! 2247: { ! 2248: #ifdef SIGCONT ! 2249: case SIGCONT: ! 2250: p->raw_status_low = Qnil; ! 2251: p->raw_status_high = Qnil; ! 2252: p->status = Qrun; ! 2253: XSETINT (p->tick, ++process_tick); ! 2254: if (!nomsg) ! 2255: status_notify (); ! 2256: break; ! 2257: #endif ! 2258: case SIGINT: ! 2259: case SIGQUIT: ! 2260: case SIGKILL: ! 2261: flush_pending_output (XFASTINT (p->infd)); ! 2262: break; ! 2263: } ! 2264: ! 2265: /* If we don't have process groups, send the signal to the immediate subprocess. ! 2266: That isn't really right, but it's better than any obvious alternative. */ ! 2267: if (no_pgrp) ! 2268: { ! 2269: kill (XFASTINT (p->pid), signo); ! 2270: return; ! 2271: } ! 2272: ! 2273: /* gid may be a pid, or minus a pgrp's number */ ! 2274: #ifdef TIOCSIGSEND ! 2275: if (!NULL (current_group)) ! 2276: ioctl (XFASTINT (p->infd), TIOCSIGSEND, signo); ! 2277: else ! 2278: { ! 2279: gid = - XFASTINT (p->pid); ! 2280: kill (gid, signo); ! 2281: } ! 2282: #else /* no TIOCSIGSEND */ ! 2283: #ifdef BSD ! 2284: /* On bsd, [man says] kill does not accept a negative number to kill a pgrp. ! 2285: Must do that differently. */ ! 2286: killpg (-gid, signo); ! 2287: #else /* Not BSD. */ ! 2288: kill (gid, signo); ! 2289: #endif /* Not BSD. */ ! 2290: #endif /* no TIOCSIGSEND */ ! 2291: } ! 2292: ! 2293: DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, ! 2294: "Interrupt process PROCESS. May be process or name of one.\n\ ! 2295: Nil or no arg means current buffer's process.\n\ ! 2296: Second arg CURRENT-GROUP non-nil means send signal to\n\ ! 2297: the current process-group of the process's controlling terminal\n\ ! 2298: rather than to the process's own process group.\n\ ! 2299: If the process is a shell, this means interrupt current subjob\n\ ! 2300: rather than the shell.") ! 2301: (process, current_group) ! 2302: Lisp_Object process, current_group; ! 2303: { ! 2304: process_send_signal (process, SIGINT, current_group, 0); ! 2305: return process; ! 2306: } ! 2307: ! 2308: DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, ! 2309: "Kill process PROCESS. May be process or name of one.\n\ ! 2310: See function interrupt-process for more details on usage.") ! 2311: (process, current_group) ! 2312: Lisp_Object process, current_group; ! 2313: { ! 2314: process_send_signal (process, SIGKILL, current_group, 0); ! 2315: return process; ! 2316: } ! 2317: ! 2318: DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, ! 2319: "Send QUIT signal to process PROCESS. May be process or name of one.\n\ ! 2320: See function interrupt-process for more details on usage.") ! 2321: (process, current_group) ! 2322: Lisp_Object process, current_group; ! 2323: { ! 2324: process_send_signal (process, SIGQUIT, current_group, 0); ! 2325: return process; ! 2326: } ! 2327: ! 2328: DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, ! 2329: "Stop process PROCESS. May be process or name of one.\n\ ! 2330: See function interrupt-process for more details on usage.") ! 2331: (process, current_group) ! 2332: Lisp_Object process, current_group; ! 2333: { ! 2334: #ifndef SIGTSTP ! 2335: error ("no SIGTSTP support"); ! 2336: #else ! 2337: process_send_signal (process, SIGTSTP, current_group, 0); ! 2338: #endif ! 2339: return process; ! 2340: } ! 2341: ! 2342: DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, ! 2343: "Continue process PROCESS. May be process or name of one.\n\ ! 2344: See function interrupt-process for more details on usage.") ! 2345: (process, current_group) ! 2346: Lisp_Object process, current_group; ! 2347: { ! 2348: #ifdef SIGCONT ! 2349: process_send_signal (process, SIGCONT, current_group, 0); ! 2350: #else ! 2351: error ("no SIGCONT support"); ! 2352: #endif ! 2353: return process; ! 2354: } ! 2355: ! 2356: DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, ! 2357: "Make PROCESS see end-of-file in its input.\n\ ! 2358: Eof comes after any text already sent to it.\n\ ! 2359: nil or no arg means current buffer's process.") ! 2360: (process) ! 2361: Lisp_Object process; ! 2362: { ! 2363: Lisp_Object proc; ! 2364: ! 2365: proc = get_process (process); ! 2366: /* Sending a zero-length record is supposed to mean eof ! 2367: when TIOCREMOTE is turned on. */ ! 2368: #ifdef DID_REMOTE ! 2369: { ! 2370: char buf[1]; ! 2371: write (XFASTINT (XPROCESS (proc)->outfd), buf, 0); ! 2372: } ! 2373: #else /* did not do TOICREMOTE */ ! 2374: if (!NULL (XPROCESS (proc)->pty_flag)) ! 2375: send_process (proc, "\004", 1); ! 2376: else ! 2377: { ! 2378: close (XPROCESS (proc)->outfd); ! 2379: XFASTINT (XPROCESS (proc)->outfd) = open ("/dev/null", O_WRONLY); ! 2380: } ! 2381: ! 2382: #endif /* did not do TOICREMOTE */ ! 2383: return process; ! 2384: } ! 2385: ! 2386: /* Kill all processes associated with `buffer'. ! 2387: If `buffer' is nil, kill all processes */ ! 2388: ! 2389: kill_buffer_processes (buffer) ! 2390: Lisp_Object buffer; ! 2391: { ! 2392: Lisp_Object tail, proc; ! 2393: ! 2394: for (tail = Vprocess_alist; XGCTYPE (tail) == Lisp_Cons; ! 2395: tail = XCONS (tail)->cdr) ! 2396: { ! 2397: proc = XCONS (XCONS (tail)->car)->cdr; ! 2398: if (XGCTYPE (proc) == Lisp_Process ! 2399: && (NULL (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) ! 2400: { ! 2401: if (NETCONN_P (proc)) ! 2402: deactivate_process (proc); ! 2403: else if (XFASTINT (XPROCESS (proc)->infd)) ! 2404: process_send_signal (proc, SIGHUP, Qnil, 1); ! 2405: } ! 2406: } ! 2407: } ! 2408: ! 2409: /* On receipt of a signal that a child status has changed, ! 2410: loop asking about children with changed statuses until ! 2411: the system says there are no more. ! 2412: All we do is change the status; ! 2413: we do not run sentinels or print notifications. ! 2414: That is saved for the next time keyboard input is done, ! 2415: in order to avoid timing errors. */ ! 2416: ! 2417: /** WARNING: this can be called during garbage collection. ! 2418: Therefore, it must not be fooled by the presence of mark bits in ! 2419: Lisp objects. */ ! 2420: ! 2421: /** USG WARNING: Although it is not obvious from the documentation ! 2422: in signal(2), on a USG system the SIGCLD handler MUST NOT call ! 2423: signal() before executing at least one wait(), otherwise the handler ! 2424: will be called again, resulting in an infinite loop. The relevant ! 2425: portion of the documentation reads "SIGCLD signals will be queued ! 2426: and the signal-catching function will be continually reentered until ! 2427: the queue is empty". Invoking signal() causes the kernel to reexamine ! 2428: the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ ! 2429: ! 2430: sigchld_handler (signo) ! 2431: int signo; ! 2432: { ! 2433: int old_errno = errno; ! 2434: Lisp_Object proc; ! 2435: register struct Lisp_Process *p; ! 2436: ! 2437: #ifdef BSD4_1 ! 2438: extern int synch_process_pid; ! 2439: extern int sigheld; ! 2440: sigheld |= sigbit (SIGCHLD); ! 2441: #endif ! 2442: ! 2443: while (1) ! 2444: { ! 2445: register int pid; ! 2446: WAITTYPE w; ! 2447: Lisp_Object tail; ! 2448: ! 2449: #ifdef WNOHANG ! 2450: #ifndef WUNTRACED ! 2451: #define WUNTRACED 0 ! 2452: #endif /* no WUNTRACED */ ! 2453: /* Keep trying to get a status until we get a definitive result. */ ! 2454: do ! 2455: { ! 2456: errno = 0; ! 2457: pid = wait3 (&w, WNOHANG | WUNTRACED, 0); ! 2458: } ! 2459: while (pid <= 0 && errno == EINTR); ! 2460: ! 2461: if (pid <= 0) ! 2462: { ! 2463: /* A real failure. We have done all our job, so return. */ ! 2464: ! 2465: /* USG systems forget handlers when they are used; ! 2466: must reestablish each time */ ! 2467: #ifdef USG ! 2468: signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ ! 2469: #endif ! 2470: #ifdef BSD4_1 ! 2471: sigheld &= ~sigbit (SIGCHLD); ! 2472: sigrelse (SIGCHLD); ! 2473: #endif ! 2474: errno = old_errno; ! 2475: return; ! 2476: } ! 2477: #else ! 2478: pid = wait (&w); ! 2479: #endif /* no WNOHANG */ ! 2480: ! 2481: #ifdef BSD4_1 ! 2482: if (synch_process_pid == pid) ! 2483: synch_process_pid = 0; /* Zero it to show process has died. */ ! 2484: #endif ! 2485: ! 2486: /* Find the process that signaled us, and record its status. */ ! 2487: ! 2488: p = 0; ! 2489: for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) ! 2490: { ! 2491: proc = XCONS (XCONS (tail)->car)->cdr; ! 2492: p = XPROCESS (proc); ! 2493: if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) ! 2494: break; ! 2495: p = 0; ! 2496: } ! 2497: ! 2498: /* If we don't recognize the pid number, ! 2499: look for a process being created. */ ! 2500: ! 2501: if (p == 0) ! 2502: for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) ! 2503: { ! 2504: proc = XCONS (XCONS (tail)->car)->cdr; ! 2505: p = XPROCESS (proc); ! 2506: if (XINT (p->pid) == -1) ! 2507: break; ! 2508: p = 0; ! 2509: } ! 2510: ! 2511: /* Change the status of the process that was found. */ ! 2512: ! 2513: if (p != 0) ! 2514: { ! 2515: union { int i; WAITTYPE wt; } u; ! 2516: ! 2517: XSETINT (p->tick, ++process_tick); ! 2518: u.wt = w; ! 2519: XFASTINT (p->raw_status_low) = u.i & 0xffff; ! 2520: XFASTINT (p->raw_status_high) = u.i >> 16; ! 2521: ! 2522: /* If process has terminated, stop waiting for its output. */ ! 2523: if (WIFSIGNALED (w) || WIFEXITED (w)) ! 2524: if (p->infd) ! 2525: FD_CLR (p->infd, &input_wait_mask); ! 2526: } ! 2527: else ! 2528: { ! 2529: /* Report the status of the synchronous process. */ ! 2530: if (WIFEXITED (w)) ! 2531: synch_process_retcode = WRETCODE (w); ! 2532: else if (WIFSIGNALED (w)) ! 2533: synch_process_death = sys_siglist[WTERMSIG (w)]; ! 2534: } ! 2535: ! 2536: /* On some systems, we must return right away. ! 2537: If any more processes want to signal us, we will ! 2538: get another signal. ! 2539: Otherwise (on systems that have WNOHANG), loop around ! 2540: to use up all the processes that have something to tell us. */ ! 2541: #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) ! 2542: #ifdef USG ! 2543: signal (signo, sigchld_handler); ! 2544: #endif ! 2545: errno = old_errno; ! 2546: return; ! 2547: #endif /* USG, but not HPUX with WNOHANG */ ! 2548: } ! 2549: } ! 2550: ! 2551: /* Report all recent events of a change in process status ! 2552: (either run the sentinel or output a message). ! 2553: This is done while Emacs is waiting for keyboard input. */ ! 2554: ! 2555: status_notify () ! 2556: { ! 2557: register Lisp_Object proc, buffer; ! 2558: Lisp_Object tail = Qnil; ! 2559: Lisp_Object msg = Qnil; ! 2560: struct gcpro gcpro1, gcpro2; ! 2561: ! 2562: /* We need to gcpro tail; if read_process_output calls a filter ! 2563: which deletes a process and removes the cons to which tail points ! 2564: from Vprocess_alist, tail becomes an unprotected reference. */ ! 2565: GCPRO2 (tail, msg); ! 2566: ! 2567: for (tail = Vprocess_alist; !NULL (tail); tail = Fcdr (tail)) ! 2568: { ! 2569: Lisp_Object symbol; ! 2570: register struct Lisp_Process *p; ! 2571: ! 2572: proc = Fcdr (Fcar (tail)); ! 2573: p = XPROCESS (proc); ! 2574: ! 2575: if (XINT (p->tick) != XINT (p->update_tick)) ! 2576: { ! 2577: XSETINT (p->update_tick, XINT (p->tick)); ! 2578: ! 2579: /* If process is still active, read any output that remains. */ ! 2580: if (XFASTINT (p->infd)) ! 2581: while (read_process_output (proc, XFASTINT (p->infd)) > 0); ! 2582: ! 2583: buffer = p->buffer; ! 2584: ! 2585: /* Get the text to use for the message. */ ! 2586: if (!NULL (p->raw_status_low)) ! 2587: update_status (p); ! 2588: msg = status_message (p->status); ! 2589: ! 2590: /* If process is terminated, deactivate it or delete it. */ ! 2591: symbol = p->status; ! 2592: if (XTYPE (p->status) == Lisp_Cons) ! 2593: symbol = XCONS (p->status)->car; ! 2594: ! 2595: if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) ! 2596: || EQ (symbol, Qclosed)) ! 2597: { ! 2598: if (delete_exited_processes) ! 2599: remove_process (proc); ! 2600: else ! 2601: deactivate_process (proc); ! 2602: } ! 2603: ! 2604: /* Now output the message suitably. */ ! 2605: if (!NULL (p->sentinel)) ! 2606: exec_sentinel (proc, msg); ! 2607: /* Don't bother with a message in the buffer ! 2608: when a process becomes runnable. */ ! 2609: else if (!EQ (symbol, Qrun) && !NULL (buffer)) ! 2610: { ! 2611: Lisp_Object ro = XBUFFER (buffer)->read_only; ! 2612: Lisp_Object tem; ! 2613: struct buffer *old = current_buffer; ! 2614: int opoint; ! 2615: ! 2616: /* Avoid error if buffer is deleted ! 2617: (probably that's why the process is dead, too) */ ! 2618: if (NULL (XBUFFER (buffer)->name)) ! 2619: continue; ! 2620: Fset_buffer (buffer); ! 2621: opoint = point; ! 2622: /* Insert new output into buffer ! 2623: at the current end-of-output marker, ! 2624: thus preserving logical ordering of input and output. */ ! 2625: if (XMARKER (p->mark)->buffer) ! 2626: SET_PT (marker_position (p->mark)); ! 2627: else ! 2628: SET_PT (ZV); ! 2629: if (point <= opoint) ! 2630: opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10; ! 2631: ! 2632: tem = current_buffer->read_only; ! 2633: current_buffer->read_only = Qnil; ! 2634: InsStr ("\nProcess "); ! 2635: Finsert (1, &p->name); ! 2636: InsStr (" "); ! 2637: Finsert (1, &msg); ! 2638: current_buffer->read_only = tem; ! 2639: Fset_marker (p->mark, make_number (point), p->buffer); ! 2640: ! 2641: SET_PT (opoint); ! 2642: set_buffer_internal (old); ! 2643: } ! 2644: } ! 2645: } /* end for */ ! 2646: ! 2647: update_mode_lines++; /* in case buffers use %s in mode-line-format */ ! 2648: redisplay_preserve_echo_area (); ! 2649: ! 2650: update_tick = process_tick; ! 2651: ! 2652: UNGCPRO; ! 2653: } ! 2654: ! 2655: exec_sentinel (proc, reason) ! 2656: Lisp_Object proc, reason; ! 2657: { ! 2658: Lisp_Object sentinel; ! 2659: register struct Lisp_Process *p = XPROCESS (proc); ! 2660: int count = specpdl_ptr - specpdl; ! 2661: ! 2662: sentinel = p->sentinel; ! 2663: if (NULL (sentinel)) ! 2664: return; ! 2665: ! 2666: p->sentinel = Qnil; ! 2667: specbind (Qinhibit_quit, Qt); ! 2668: this_filter = sentinel; ! 2669: filter_process = proc; ! 2670: filter_string = reason; ! 2671: call2 (this_filter, filter_process, filter_string); ! 2672: /* internal_condition_case (run_filter, Qerror, Fidentity); */ ! 2673: unbind_to (count); ! 2674: p->sentinel = sentinel; ! 2675: } ! 2676: ! 2677: init_process () ! 2678: { ! 2679: register int i; ! 2680: ! 2681: #ifdef SIGCHLD ! 2682: #ifndef CANNOT_DUMP ! 2683: if (! noninteractive || initialized) ! 2684: #endif ! 2685: signal (SIGCHLD, sigchld_handler); ! 2686: #endif ! 2687: ! 2688: FD_ZERO (&input_wait_mask); ! 2689: FD_SET (0, &input_wait_mask); ! 2690: Vprocess_alist = Qnil; ! 2691: for (i = 0; i < MAXDESC; i++) ! 2692: { ! 2693: chan_process[i] = Qnil; ! 2694: proc_buffered_char[i] = -1; ! 2695: } ! 2696: } ! 2697: ! 2698: syms_of_process () ! 2699: { ! 2700: Qprocessp = intern ("processp"); ! 2701: staticpro (&Qprocessp); ! 2702: Qrun = intern ("run"); ! 2703: staticpro (&Qrun); ! 2704: Qstop = intern ("stop"); ! 2705: staticpro (&Qstop); ! 2706: Qsignal = intern ("signal"); ! 2707: staticpro (&Qsignal); ! 2708: ! 2709: /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it ! 2710: here again. ! 2711: ! 2712: Qexit = intern ("exit"); ! 2713: staticpro (&Qexit); */ ! 2714: ! 2715: Qopen = intern ("open"); ! 2716: staticpro (&Qopen); ! 2717: Qclosed = intern ("closed"); ! 2718: staticpro (&Qclosed); ! 2719: ! 2720: staticpro (&Vprocess_alist); ! 2721: ! 2722: DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, ! 2723: "*Non-nil means delete processes immediately when they exit.\n\ ! 2724: nil means don't delete them until `list-processes' is run."); ! 2725: ! 2726: delete_exited_processes = 1; ! 2727: ! 2728: DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, ! 2729: "Control type of device used to communicate with subprocesses.\n\ ! 2730: Values are nil to use a pipe, t for a pty (or pipe if ptys not supported).\n\ ! 2731: Value takes effect when `start-process' is called."); ! 2732: Vprocess_connection_type = Qt; ! 2733: ! 2734: defsubr (&Sprocessp); ! 2735: defsubr (&Sget_process); ! 2736: defsubr (&Sget_buffer_process); ! 2737: defsubr (&Sdelete_process); ! 2738: defsubr (&Sprocess_status); ! 2739: defsubr (&Sprocess_exit_status); ! 2740: defsubr (&Sprocess_id); ! 2741: defsubr (&Sprocess_name); ! 2742: defsubr (&Sprocess_command); ! 2743: defsubr (&Sset_process_buffer); ! 2744: defsubr (&Sprocess_buffer); ! 2745: defsubr (&Sprocess_mark); ! 2746: defsubr (&Sset_process_filter); ! 2747: defsubr (&Sprocess_filter); ! 2748: defsubr (&Sset_process_sentinel); ! 2749: defsubr (&Sprocess_sentinel); ! 2750: defsubr (&Sprocess_kill_without_query); ! 2751: defsubr (&Slist_processes); ! 2752: defsubr (&Sprocess_list); ! 2753: defsubr (&Sstart_process); ! 2754: #ifdef HAVE_SOCKETS ! 2755: defsubr (&Sopen_network_stream); ! 2756: #endif /* HAVE_SOCKETS */ ! 2757: defsubr (&Saccept_process_output); ! 2758: defsubr (&Sprocess_send_region); ! 2759: defsubr (&Sprocess_send_string); ! 2760: defsubr (&Sinterrupt_process); ! 2761: defsubr (&Skill_process); ! 2762: defsubr (&Squit_process); ! 2763: defsubr (&Sstop_process); ! 2764: defsubr (&Scontinue_process); ! 2765: defsubr (&Sprocess_send_eof); ! 2766: defsubr (&Swaiting_for_user_input_p); ! 2767: } ! 2768: ! 2769: #endif /* subprocesses */
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