![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to ex_io.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [CSRG BSD Unix] / 43BSDReno / foreign / src / ex|
Return to ex_io.c CVS log | Up to [CSRG BSD Unix] / 43BSDReno / foreign / src / ex |
1.1 ! root 1: /* ! 2: * Copyright (c) 1980 Regents of the University of California. ! 3: * All rights reserved. The Berkeley software License Agreement ! 4: * specifies the terms and conditions for redistribution. ! 5: */ ! 6: ! 7: #ifndef lint ! 8: static char *sccsid = "@(#)ex_io.c 7.18.1.1 (Berkeley) 10/21/90"; ! 9: #endif not lint ! 10: ! 11: #include "ex.h" ! 12: #include "ex_argv.h" ! 13: #include "ex_temp.h" ! 14: #include "ex_tty.h" ! 15: #include "ex_vis.h" ! 16: #include <sys/file.h> ! 17: #include <sys/exec.h> ! 18: #include "pathnames.h" ! 19: ! 20: /* ! 21: * File input/output, source, preserve and recover ! 22: */ ! 23: ! 24: /* ! 25: * Following remember where . was in the previous file for return ! 26: * on file switching. ! 27: */ ! 28: int altdot; ! 29: int oldadot; ! 30: bool wasalt; ! 31: short isalt; ! 32: ! 33: long cntch; /* Count of characters on unit io */ ! 34: #ifndef VMUNIX ! 35: short cntln; /* Count of lines " */ ! 36: #else ! 37: int cntln; ! 38: #endif ! 39: long cntnull; /* Count of nulls " */ ! 40: long cntodd; /* Count of non-ascii characters " */ ! 41: ! 42: #ifdef FLOCKFILE ! 43: /* ! 44: * The alternate, saved and current file are locked the extent of the ! 45: * time that they are active. If the saved file is exchanged ! 46: * with the alternate file, the file descriptors are exchanged ! 47: * and the lock is not released. ! 48: */ ! 49: int io_savedfile, io_altfile, io_curr ; ! 50: int lock_savedfile, lock_altfile, lock_curr ; ! 51: #endif FLOCKFILE ! 52: ! 53: /* ! 54: * Parse file name for command encoded by comm. ! 55: * If comm is E then command is doomed and we are ! 56: * parsing just so user won't have to retype the name. ! 57: */ ! 58: filename(comm) ! 59: int comm; ! 60: { ! 61: register int c = comm, d; ! 62: register int i; ! 63: #ifdef FLOCKFILE ! 64: int lock ; ! 65: ! 66: lock = 0 ; ! 67: #endif FLOCKFILE ! 68: ! 69: d = ex_getchar(); ! 70: if (endcmd(d)) { ! 71: if (savedfile[0] == 0 && comm != 'f') ! 72: error("No file|No current filename"); ! 73: CP(file, savedfile); ! 74: #ifdef FLOCKFILE ! 75: if (io_curr && io_curr != io_savedfile) close(io_curr) ; ! 76: lock = lock_curr = lock_savedfile ; ! 77: io_curr = io_savedfile ; ! 78: #endif FLOCKFILE ! 79: wasalt = (isalt > 0) ? isalt-1 : 0; ! 80: isalt = 0; ! 81: oldadot = altdot; ! 82: if (c == 'e' || c == 'E') ! 83: altdot = lineDOT(); ! 84: if (d == EOF) ! 85: ungetchar(d); ! 86: } else { ! 87: ungetchar(d); ! 88: getone(); ! 89: eol(); ! 90: if (savedfile[0] == 0 && c != 'E' && c != 'e') { ! 91: c = 'e'; ! 92: edited = 0; ! 93: } ! 94: wasalt = strcmp(file, altfile) == 0; ! 95: oldadot = altdot; ! 96: switch (c) { ! 97: ! 98: case 'f': ! 99: edited = 0; ! 100: /* fall into ... */ ! 101: ! 102: case 'e': ! 103: if (savedfile[0]) { ! 104: #ifdef FLOCKFILE ! 105: if (strcmp(file,savedfile) == 0) break ; ! 106: #endif FLOCKFILE ! 107: altdot = lineDOT(); ! 108: CP(altfile, savedfile); ! 109: #ifdef FLOCKFILE ! 110: if (io_altfile) close (io_altfile) ; ! 111: io_altfile = io_savedfile ; ! 112: lock_altfile = lock_savedfile ; ! 113: io_savedfile = 0 ; ! 114: #endif FLOCKFILE ! 115: } ! 116: CP(savedfile, file); ! 117: #ifdef FLOCKFILE ! 118: io_savedfile = io_curr ; ! 119: lock_savedfile = lock_curr ; ! 120: io_curr = 0 ; lock = lock_curr = 0 ; ! 121: #endif FLOCKFILE ! 122: break; ! 123: ! 124: default: ! 125: if (file[0]) { ! 126: #ifdef FLOCKFILE ! 127: if (wasalt) break ; ! 128: #endif ! 129: if (c != 'E') ! 130: altdot = lineDOT(); ! 131: CP(altfile, file); ! 132: #ifdef FLOCKFILE ! 133: if (io_altfile ! 134: && io_altfile != io_curr) close (io_altfile) ; ! 135: io_altfile = io_curr ; ! 136: lock_altfile = lock_curr ; ! 137: io_curr = 0 ; lock = lock_curr = 0 ; ! 138: #endif FLOCKFILE ! 139: } ! 140: break; ! 141: } ! 142: } ! 143: if (hush && comm != 'f' || comm == 'E') ! 144: return; ! 145: if (file[0] != 0) { ! 146: lprintf("\"%s\"", file); ! 147: if (comm == 'f') { ! 148: if (value(READONLY)) ! 149: ex_printf(" [Read only]"); ! 150: if (!edited) ! 151: ex_printf(" [Not edited]"); ! 152: if (tchng) ! 153: ex_printf(" [Modified]"); ! 154: #ifdef FLOCKFILE ! 155: if (lock == LOCK_SH) ! 156: ex_printf(" [Shared lock]") ; ! 157: else if (lock == LOCK_EX) ! 158: ex_printf(" [Exclusive lock]") ; ! 159: #endif FLOCKFILE ! 160: } ! 161: flush(); ! 162: } else ! 163: ex_printf("No file "); ! 164: if (comm == 'f') { ! 165: if (!(i = lineDOL())) ! 166: i++; ! 167: ex_printf(" line %d of %d --%ld%%--", lineDOT(), lineDOL(), ! 168: (long) 100 * lineDOT() / i); ! 169: } ! 170: } ! 171: ! 172: /* ! 173: * Get the argument words for a command into genbuf ! 174: * expanding # and %. ! 175: */ ! 176: getargs() ! 177: { ! 178: register int c; ! 179: register char *cp, *fp; ! 180: static char fpatbuf[32]; /* hence limit on :next +/pat */ ! 181: ! 182: pastwh(); ! 183: if (peekchar() == '+') { ! 184: for (cp = fpatbuf;;) { ! 185: c = *cp++ = ex_getchar(); ! 186: if (cp >= &fpatbuf[sizeof(fpatbuf)]) ! 187: error("Pattern too long"); ! 188: if (c == '\\' && isspace(peekchar())) ! 189: c = ex_getchar(); ! 190: if (c == EOF || isspace(c)) { ! 191: ungetchar(c); ! 192: *--cp = 0; ! 193: firstpat = &fpatbuf[1]; ! 194: break; ! 195: } ! 196: } ! 197: } ! 198: if (skipend()) ! 199: return (0); ! 200: CP(genbuf, "echo "); cp = &genbuf[5]; ! 201: for (;;) { ! 202: c = ex_getchar(); ! 203: if (endcmd(c)) { ! 204: ungetchar(c); ! 205: break; ! 206: } ! 207: switch (c) { ! 208: ! 209: case '\\': ! 210: if (any(peekchar(), "#%|")) ! 211: c = ex_getchar(); ! 212: /* fall into... */ ! 213: ! 214: default: ! 215: if (cp > &genbuf[LBSIZE - 2]) ! 216: flong: ! 217: error("Argument buffer overflow"); ! 218: *cp++ = c; ! 219: break; ! 220: ! 221: case '#': ! 222: fp = altfile; ! 223: if (*fp == 0) ! 224: error("No alternate filename@to substitute for #"); ! 225: goto filexp; ! 226: ! 227: case '%': ! 228: fp = savedfile; ! 229: if (*fp == 0) ! 230: error("No current filename@to substitute for %%"); ! 231: filexp: ! 232: while (*fp) { ! 233: if (cp > &genbuf[LBSIZE - 2]) ! 234: goto flong; ! 235: *cp++ = *fp++; ! 236: } ! 237: break; ! 238: } ! 239: } ! 240: *cp = 0; ! 241: return (1); ! 242: } ! 243: ! 244: /* ! 245: * Glob the argument words in genbuf, or if no globbing ! 246: * is implied, just split them up directly. ! 247: */ ! 248: glob(gp) ! 249: struct glob *gp; ! 250: { ! 251: int pvec[2]; ! 252: register char **argv = gp->argv; ! 253: register char *cp = gp->argspac; ! 254: register int c; ! 255: char ch; ! 256: int nleft = NCARGS; ! 257: ! 258: gp->argc0 = 0; ! 259: if (gscan() == 0) { ! 260: register char *v = genbuf + 5; /* strlen("echo ") */ ! 261: ! 262: for (;;) { ! 263: while (isspace(*v)) ! 264: v++; ! 265: if (!*v) ! 266: break; ! 267: *argv++ = cp; ! 268: while (*v && !isspace(*v)) ! 269: *cp++ = *v++; ! 270: *cp++ = 0; ! 271: gp->argc0++; ! 272: } ! 273: *argv = 0; ! 274: return; ! 275: } ! 276: if (pipe(pvec) < 0) ! 277: error("Can't make pipe to glob"); ! 278: pid = vfork(); ! 279: io = pvec[0]; ! 280: if (pid < 0) { ! 281: close(pvec[1]); ! 282: error("Can't fork to do glob"); ! 283: } ! 284: if (pid == 0) { ! 285: int oerrno; ! 286: ! 287: if (genbuf) { ! 288: register char *ccp = genbuf; ! 289: while (*ccp) ! 290: *ccp++ &= TRIM; ! 291: } ! 292: close(1); ! 293: dup(pvec[1]); ! 294: close(pvec[0]); ! 295: close(2); /* so errors don't mess up the screen */ ! 296: ignore(open(_PATH_DEVNULL, 1)); ! 297: execl(svalue(SHELL), "sh", "-c", genbuf, 0); ! 298: oerrno = errno; ! 299: close(1); ! 300: dup(2); ! 301: errno = oerrno; ! 302: filioerr(svalue(SHELL)); ! 303: } ! 304: close(pvec[1]); ! 305: do { ! 306: *argv = cp; ! 307: for (;;) { ! 308: if (read(io, &ch, 1) != 1) { ! 309: close(io); ! 310: c = -1; ! 311: } else ! 312: c = ch & TRIM; ! 313: if (c <= 0 || isspace(c)) ! 314: break; ! 315: *cp++ = c; ! 316: if (--nleft <= 0) ! 317: error("Arg list too long"); ! 318: } ! 319: if (cp != *argv) { ! 320: --nleft; ! 321: *cp++ = 0; ! 322: gp->argc0++; ! 323: if (gp->argc0 >= NARGS) ! 324: error("Arg list too long"); ! 325: argv++; ! 326: } ! 327: } while (c >= 0); ! 328: waitfor(); ! 329: if (gp->argc0 == 0) ! 330: error("No match"); ! 331: } ! 332: ! 333: /* ! 334: * Scan genbuf for shell metacharacters. ! 335: * Set is union of v7 shell and csh metas. ! 336: */ ! 337: gscan() ! 338: { ! 339: #ifndef vms /* Never have meta-characters in vms */ ! 340: register char *cp; ! 341: ! 342: for (cp = genbuf; *cp; cp++) ! 343: if (any(*cp, "~{[*?$`'\"\\")) ! 344: return (1); ! 345: #endif ! 346: return (0); ! 347: } ! 348: ! 349: /* ! 350: * Parse one filename into file. ! 351: */ ! 352: struct glob G; ! 353: getone() ! 354: { ! 355: register char *str; ! 356: ! 357: if (getargs() == 0) ! 358: error("Missing filename"); ! 359: glob(&G); ! 360: if (G.argc0 > 1) ! 361: error("Ambiguous|Too many file names"); ! 362: str = G.argv[G.argc0 - 1]; ! 363: if (strlen(str) > FNSIZE - 4) ! 364: error("Filename too long"); ! 365: CP(file, str); ! 366: } ! 367: ! 368: /* ! 369: * Read a file from the world. ! 370: * C is command, 'e' if this really an edit (or a recover). ! 371: */ ! 372: rop(c) ! 373: int c; ! 374: { ! 375: register int i; ! 376: struct stat stbuf; ! 377: struct exec head; ! 378: static int ovro; /* old value(READONLY) */ ! 379: static int denied; /* 1 if READONLY was set due to file permissions */ ! 380: #ifdef FLOCKFILE ! 381: int *lp, *iop; ! 382: #endif FLOCKFILE ! 383: ! 384: io = open(file, 0); ! 385: if (io < 0) { ! 386: if (c == 'e' && errno == ENOENT) { ! 387: edited++; ! 388: /* ! 389: * If the user just did "ex foo" he is probably ! 390: * creating a new file. Don't be an error, since ! 391: * this is ugly, and it screws up the + option. ! 392: */ ! 393: if (!seenprompt) { ! 394: ex_printf(" [New file]"); ! 395: noonl(); ! 396: return; ! 397: } ! 398: } ! 399: syserror(); ! 400: } ! 401: if (fstat(io, &stbuf)) ! 402: syserror(); ! 403: switch (stbuf.st_mode & S_IFMT) { ! 404: ! 405: case S_IFBLK: ! 406: error(" Block special file"); ! 407: ! 408: case S_IFCHR: ! 409: if (isatty(io)) ! 410: error(" Teletype"); ! 411: if (samei(&stbuf, _PATH_DEVNULL)) ! 412: break; ! 413: error(" Character special file"); ! 414: ! 415: case S_IFDIR: ! 416: error(" Directory"); ! 417: ! 418: case S_IFREG: ! 419: i = read(io, (char *)&head, sizeof(head)); ! 420: (void)lseek(io, 0L, L_SET); ! 421: if (i != sizeof(head)) ! 422: break; ! 423: #ifndef vms ! 424: switch ((int)head.a_magic) { ! 425: ! 426: case 0405: /* data overlay on exec */ ! 427: case OMAGIC: /* unshared */ ! 428: case NMAGIC: /* shared text */ ! 429: case 0411: /* separate I/D */ ! 430: case ZMAGIC: /* VM/Unix demand paged */ ! 431: case 0430: /* PDP-11 Overlay shared */ ! 432: case 0431: /* PDP-11 Overlay sep I/D */ ! 433: error(" Executable"); ! 434: ! 435: /* ! 436: * We do not forbid the editing of portable archives ! 437: * because it is reasonable to edit them, especially ! 438: * if they are archives of text files. This is ! 439: * especially useful if you archive source files together ! 440: * and copy them to another system with ~%take, since ! 441: * the files sometimes show up munged and must be fixed. ! 442: */ ! 443: case 0177545: ! 444: case 0177555: ! 445: error(" Archive"); ! 446: case 070707: ! 447: error(" Cpio file"); ! 448: ! 449: default: ! 450: { ! 451: char *bp = (char *)&head; ! 452: if ((u_char)bp[0] == (u_char)'\037' && ! 453: (u_char)bp[1] == (u_char)'\235') ! 454: error(" Compressed file"); ! 455: if (!strncmp(bp, "!<arch>\n__.SYMDEF", 17) ! 456: || !strncmp(bp, "!<arch>\n", 8)) ! 457: error(" Archive"); ! 458: } ! 459: break; ! 460: } ! 461: #endif ! 462: } ! 463: if (c != 'r') { ! 464: if (value(READONLY) && denied) { ! 465: value(READONLY) = ovro; ! 466: denied = 0; ! 467: } ! 468: if ((stbuf.st_mode & 0222) == 0 || access(file, 2) < 0) { ! 469: ovro = value(READONLY); ! 470: denied = 1; ! 471: value(READONLY) = 1; ! 472: } ! 473: } ! 474: if (value(READONLY)) { ! 475: ex_printf(" [Read only]"); ! 476: flush(); ! 477: } ! 478: #ifdef FLOCKFILE ! 479: /* ! 480: * Attempt to lock the file. We use an sharable lock if reading ! 481: * the file, and an exclusive lock if editting a file. ! 482: * The lock will be released when the file is no longer being ! 483: * referenced. At any time, the editor can have as many as ! 484: * three files locked, and with different lock statuses. ! 485: */ ! 486: /* ! 487: * if this is either the saved or alternate file or current file, ! 488: * point to the appropriate descriptor and file lock status. ! 489: */ ! 490: if (strcmp (file,savedfile) == 0) { ! 491: if (!io_savedfile) io_savedfile = dup(io) ; ! 492: lp = &lock_savedfile ; iop = &io_savedfile ; ! 493: } else if (strcmp (file,altfile) == 0) { ! 494: if (!io_altfile) io_altfile = dup(io) ; ! 495: lp = &lock_altfile ; iop = &io_altfile ; ! 496: } else { ! 497: /* throw away current lock, accquire new current lock */ ! 498: if (io_curr) close (io_curr) ; ! 499: io_curr = dup(io) ; ! 500: lp = &lock_curr ; iop = &io_curr ; ! 501: lock_curr = 0 ; ! 502: } ! 503: if (c == 'r' || value(READONLY) || *lp == 0) { ! 504: /* if we have a lock already, don't bother */ ! 505: if (!*lp) { ! 506: /* try for a shared lock */ ! 507: if (flock(*iop, LOCK_SH|LOCK_NB) < 0 ! 508: && errno == EWOULDBLOCK) { ! 509: ex_printf ( ! 510: " [FILE BEING MODIFIED BY ANOTHER PROCESS]") ; ! 511: flush(); ! 512: goto fail_lock ; ! 513: } else *lp = LOCK_SH ; ! 514: } ! 515: } ! 516: if ( c != 'r' && !value(READONLY) && *lp != LOCK_EX) { ! 517: /* if we are editting the file, upgrade to an exclusive lock. */ ! 518: if (flock(*iop, LOCK_EX|LOCK_NB) < 0 && errno == EWOULDBLOCK) { ! 519: ex_printf (" [File open by another process]") ; ! 520: flush(); ! 521: } else *lp = LOCK_EX ; ! 522: } ! 523: fail_lock: ! 524: #endif FLOCKFILE ! 525: if (c == 'r') ! 526: setdot(); ! 527: else ! 528: setall(); ! 529: if (FIXUNDO && inopen && c == 'r') ! 530: undap1 = undap2 = dot + 1; ! 531: rop2(); ! 532: rop3(c); ! 533: } ! 534: ! 535: rop2() ! 536: { ! 537: line *first, *last, *a; ! 538: struct stat statb; ! 539: ! 540: deletenone(); ! 541: clrstats(); ! 542: first = addr2 + 1; ! 543: if (fstat(io, &statb) < 0) ! 544: bsize = LBSIZE; ! 545: else { ! 546: bsize = statb.st_blksize; ! 547: if (bsize <= 0) ! 548: bsize = LBSIZE; ! 549: } ! 550: ignore(append(getfile, addr2)); ! 551: last = dot; ! 552: /* ! 553: * if the modeline variable is set, ! 554: * check the first and last five lines of the file ! 555: * for a mode line. ! 556: */ ! 557: if (value(MODELINE)) { ! 558: for (a=first; a<=last; a++) { ! 559: if (a==first+5 && last-first > 10) ! 560: a = last - 4; ! 561: getline(*a); ! 562: checkmodeline(linebuf); ! 563: } ! 564: } ! 565: } ! 566: ! 567: rop3(c) ! 568: int c; ! 569: { ! 570: ! 571: if (iostats() == 0 && c == 'e') ! 572: edited++; ! 573: if (c == 'e') { ! 574: if (wasalt || firstpat) { ! 575: register line *addr = zero + oldadot; ! 576: ! 577: if (addr > dol) ! 578: addr = dol; ! 579: if (firstpat) { ! 580: globp = (*firstpat) ? firstpat : "$"; ! 581: commands(1,1); ! 582: firstpat = 0; ! 583: } else if (addr >= one) { ! 584: if (inopen) ! 585: dot = addr; ! 586: markpr(addr); ! 587: } else ! 588: goto other; ! 589: } else ! 590: other: ! 591: if (dol > zero) { ! 592: if (inopen) ! 593: dot = one; ! 594: markpr(one); ! 595: } ! 596: if(FIXUNDO) ! 597: undkind = UNDNONE; ! 598: if (inopen) { ! 599: vcline = 0; ! 600: vreplace(0, LINES, lineDOL()); ! 601: } ! 602: } ! 603: } ! 604: ! 605: /* ! 606: * Are these two really the same inode? ! 607: */ ! 608: samei(sp, cp) ! 609: struct stat *sp; ! 610: char *cp; ! 611: { ! 612: struct stat stb; ! 613: ! 614: if (stat(cp, &stb) < 0 || sp->st_dev != stb.st_dev) ! 615: return (0); ! 616: return (sp->st_ino == stb.st_ino); ! 617: } ! 618: ! 619: /* Returns from edited() */ ! 620: #define EDF 0 /* Edited file */ ! 621: #define NOTEDF -1 /* Not edited file */ ! 622: #define PARTBUF 1 /* Write of partial buffer to Edited file */ ! 623: ! 624: /* ! 625: * Write a file. ! 626: */ ! 627: wop(dofname) ! 628: bool dofname; /* if 1 call filename, else use savedfile */ ! 629: { ! 630: register int c, exclam, nonexist; ! 631: line *saddr1, *saddr2; ! 632: struct stat stbuf; ! 633: #ifdef FLOCKFILE ! 634: int *lp, *iop ; ! 635: #endif FLOCKFILE ! 636: ! 637: c = 0; ! 638: exclam = 0; ! 639: if (dofname) { ! 640: if (peekchar() == '!') ! 641: exclam++, ignchar(); ! 642: ignore(skipwh()); ! 643: while (peekchar() == '>') ! 644: ignchar(), c++, ignore(skipwh()); ! 645: if (c != 0 && c != 2) ! 646: error("Write forms are 'w' and 'w>>'"); ! 647: filename('w'); ! 648: } else { ! 649: if (savedfile[0] == 0) ! 650: error("No file|No current filename"); ! 651: saddr1=addr1; ! 652: saddr2=addr2; ! 653: addr1=one; ! 654: addr2=dol; ! 655: CP(file, savedfile); ! 656: if (inopen) { ! 657: vclrech(0); ! 658: splitw++; ! 659: } ! 660: lprintf("\"%s\"", file); ! 661: } ! 662: nonexist = stat(file, &stbuf); ! 663: #ifdef FLOCKFILE ! 664: /* ! 665: * if this is either the saved or alternate file or current file, ! 666: * point to the appropriate descriptor and file lock status. ! 667: */ ! 668: if (strcmp (file,savedfile) == 0) { ! 669: lp = &lock_savedfile ; iop = &io_savedfile ; ! 670: } else if (strcmp (file,altfile) == 0) { ! 671: lp = &lock_altfile ; iop = &io_altfile ; ! 672: } else { ! 673: lp = &lock_curr ; iop = &io_curr ; ! 674: } ! 675: if (!*iop && !nonexist){ ! 676: *lp = 0 ; ! 677: if ((*iop = open(file, 1)) < 0) *iop = 0 ; ! 678: } ! 679: #endif FLOCKFILE ! 680: switch (c) { ! 681: ! 682: case 0: ! 683: if (!exclam && (!value(WRITEANY) || value(READONLY))) ! 684: switch (edfile()) { ! 685: ! 686: case NOTEDF: ! 687: if (nonexist) ! 688: break; ! 689: if ((stbuf.st_mode & S_IFMT) == S_IFCHR) { ! 690: if (samei(&stbuf, _PATH_DEVNULL)) ! 691: break; ! 692: if (samei(&stbuf, _PATH_TTY)) ! 693: break; ! 694: } ! 695: io = open(file, 1); ! 696: if (io < 0) ! 697: syserror(); ! 698: if (!isatty(io)) ! 699: serror(" File exists| File exists - use \"w! %s\" to overwrite", file); ! 700: close(io); ! 701: break; ! 702: ! 703: case EDF: ! 704: if (value(READONLY)) ! 705: error(" File is read only"); ! 706: break; ! 707: ! 708: case PARTBUF: ! 709: if (value(READONLY)) ! 710: error(" File is read only"); ! 711: error(" Use \"w!\" to write partial buffer"); ! 712: } ! 713: cre: ! 714: /* ! 715: synctmp(); ! 716: */ ! 717: #ifdef FLOCKFILE ! 718: if (*iop && !*lp != LOCK_EX && !exclam) { ! 719: /* ! 720: * upgrade to a exclusive lock. if can't get, someone else ! 721: * has the exclusive lock. bitch to the user. ! 722: */ ! 723: if (flock(*iop, LOCK_EX|LOCK_NB) < 0 && errno == EWOULDBLOCK) ! 724: error (" File being modified by another process - use \"w!\" to write"); ! 725: else *lp = LOCK_EX ; ! 726: } ! 727: #endif FLOCKFILE ! 728: #ifdef V6 ! 729: io = creat(file, 0644); ! 730: #else ! 731: io = creat(file, 0666); ! 732: #ifdef vms /* to retain file protection modes on newer version of file */ ! 733: if (!nonexist) ! 734: chmod(file, stbuf.st_mode & 0777); ! 735: #endif ! 736: #endif ! 737: if (io < 0) ! 738: syserror(); ! 739: writing = 1; ! 740: if (hush == 0) ! 741: if (nonexist) ! 742: ex_printf(" [New file]"); ! 743: else if (value(WRITEANY) && edfile() != EDF) ! 744: ex_printf(" [Existing file]"); ! 745: #ifdef FLOCKFILE ! 746: if (!*iop) ! 747: *iop = dup(io) ; ! 748: #endif FLOCKFILE ! 749: break; ! 750: ! 751: case 2: ! 752: io = open(file, 1); ! 753: if (io < 0) { ! 754: if (exclam || value(WRITEANY)) ! 755: goto cre; ! 756: syserror(); ! 757: } ! 758: lseek(io, 0l, 2); ! 759: #ifdef FLOCKFILE ! 760: if (!*iop) *iop = dup(io) ; ! 761: if (*lp != LOCK_EX && !exclam) { ! 762: /* ! 763: * upgrade to a exclusive lock. if can't get, ! 764: * someone else has the exclusive lock. ! 765: * bitch to the user. ! 766: */ ! 767: if (flock(*iop, LOCK_SH|LOCK_NB) < 0 ! 768: && errno == EWOULDBLOCK) ! 769: error ( ! 770: " File being modified by another process - use \"w!>>\" to write"); ! 771: else *lp = LOCK_EX ; ! 772: } ! 773: #endif FLOCKFILE ! 774: break; ! 775: } ! 776: #ifdef FLOCKFILE ! 777: if (flock(*iop, LOCK_EX|LOCK_NB) >= 0) ! 778: *lp = LOCK_EX ; ! 779: #endif FLOCKFILE ! 780: putfile(0); ! 781: #ifndef vms ! 782: (void) fsync(io); ! 783: #endif ! 784: ignore(iostats()); ! 785: if (c != 2 && addr1 == one && addr2 == dol) { ! 786: if (eq(file, savedfile)) ! 787: edited = 1; ! 788: ex_sync(); ! 789: } ! 790: if (!dofname) { ! 791: addr1 = saddr1; ! 792: addr2 = saddr2; ! 793: } ! 794: writing = 0; ! 795: } ! 796: ! 797: /* ! 798: * Is file the edited file? ! 799: * Work here is that it is not considered edited ! 800: * if this is a partial buffer, and distinguish ! 801: * all cases. ! 802: */ ! 803: edfile() ! 804: { ! 805: ! 806: if (!edited || !eq(file, savedfile)) ! 807: return (NOTEDF); ! 808: return (addr1 == one && addr2 == dol ? EDF : PARTBUF); ! 809: } ! 810: ! 811: /* ! 812: * Extract the next line from the io stream. ! 813: */ ! 814: char *nextip; ! 815: ! 816: getfile() ! 817: { ! 818: register short c; ! 819: register char *lp, *fp; ! 820: ! 821: lp = linebuf; ! 822: fp = nextip; ! 823: do { ! 824: if (--ninbuf < 0) { ! 825: ninbuf = read(io, genbuf, (int) bsize) - 1; ! 826: if (ninbuf < 0) { ! 827: if (lp != linebuf) { ! 828: lp++; ! 829: ex_printf(" [Incomplete last line]"); ! 830: break; ! 831: } ! 832: return (EOF); ! 833: } ! 834: fp = genbuf; ! 835: cntch += ninbuf+1; ! 836: } ! 837: if (lp >= &linebuf[LBSIZE]) { ! 838: error(" Line too long"); ! 839: } ! 840: c = *fp++; ! 841: if (c == 0) { ! 842: cntnull++; ! 843: continue; ! 844: } ! 845: if (c & QUOTE) { ! 846: cntodd++; ! 847: c &= TRIM; ! 848: if (c == 0) ! 849: continue; ! 850: } ! 851: *lp++ = c; ! 852: } while (c != '\n'); ! 853: *--lp = 0; ! 854: nextip = fp; ! 855: cntln++; ! 856: return (0); ! 857: } ! 858: ! 859: /* ! 860: * Write a range onto the io stream. ! 861: */ ! 862: /* ARGSUSED */ ! 863: putfile(isfilter) ! 864: int isfilter; ! 865: { ! 866: line *a1; ! 867: register char *fp, *lp; ! 868: register int nib; ! 869: struct stat statb; ! 870: ! 871: a1 = addr1; ! 872: clrstats(); ! 873: cntln = addr2 - a1 + 1; ! 874: if (cntln == 0) ! 875: return; ! 876: if (fstat(io, &statb) < 0) ! 877: bsize = LBSIZE; ! 878: else { ! 879: bsize = statb.st_blksize; ! 880: if (bsize <= 0) ! 881: bsize = LBSIZE; ! 882: } ! 883: nib = bsize; ! 884: fp = genbuf; ! 885: do { ! 886: getline(*a1++); ! 887: lp = linebuf; ! 888: for (;;) { ! 889: if (--nib < 0) { ! 890: nib = fp - genbuf; ! 891: if (write(io, genbuf, nib) != nib) { ! 892: wrerror(); ! 893: } ! 894: cntch += nib; ! 895: nib = bsize - 1; ! 896: fp = genbuf; ! 897: } ! 898: if ((*fp++ = *lp++) == 0) { ! 899: fp[-1] = '\n'; ! 900: break; ! 901: } ! 902: } ! 903: } while (a1 <= addr2); ! 904: nib = fp - genbuf; ! 905: if (write(io, genbuf, nib) != nib) { ! 906: wrerror(); ! 907: } ! 908: cntch += nib; ! 909: } ! 910: ! 911: /* ! 912: * A write error has occurred; if the file being written was ! 913: * the edited file then we consider it to have changed since it is ! 914: * now likely scrambled. ! 915: */ ! 916: wrerror() ! 917: { ! 918: ! 919: if (eq(file, savedfile) && edited) ! 920: change(); ! 921: syserror(); ! 922: } ! 923: ! 924: /* ! 925: * Source command, handles nested sources. ! 926: * Traps errors since it mungs unit 0 during the source. ! 927: */ ! 928: short slevel; ! 929: short ttyindes; ! 930: ! 931: source(fil, okfail) ! 932: char *fil; ! 933: bool okfail; ! 934: { ! 935: jmp_buf osetexit; ! 936: register int saveinp, ointty, oerrno; ! 937: char *saveglobp; ! 938: short savepeekc; ! 939: ! 940: signal(SIGINT, SIG_IGN); ! 941: saveinp = dup(0); ! 942: savepeekc = peekc; ! 943: saveglobp = globp; ! 944: peekc = 0; globp = 0; ! 945: if (saveinp < 0) ! 946: error("Too many nested sources"); ! 947: if (slevel <= 0) ! 948: ttyindes = saveinp; ! 949: close(0); ! 950: if (open(fil, 0) < 0) { ! 951: oerrno = errno; ! 952: setrupt(); ! 953: dup(saveinp); ! 954: close(saveinp); ! 955: errno = oerrno; ! 956: if (!okfail) ! 957: filioerr(fil); ! 958: return; ! 959: } ! 960: slevel++; ! 961: ointty = intty; ! 962: intty = isatty(0); ! 963: oprompt = value(PROMPT); ! 964: value(PROMPT) &= intty; ! 965: getexit(osetexit); ! 966: setrupt(); ! 967: if (setexit() == 0) ! 968: commands(1, 1); ! 969: else if (slevel > 1) { ! 970: close(0); ! 971: dup(saveinp); ! 972: close(saveinp); ! 973: slevel--; ! 974: resexit(osetexit); ! 975: reset(); ! 976: } ! 977: intty = ointty; ! 978: value(PROMPT) = oprompt; ! 979: close(0); ! 980: dup(saveinp); ! 981: close(saveinp); ! 982: globp = saveglobp; ! 983: peekc = savepeekc; ! 984: slevel--; ! 985: resexit(osetexit); ! 986: } ! 987: ! 988: /* ! 989: * Clear io statistics before a read or write. ! 990: */ ! 991: clrstats() ! 992: { ! 993: ! 994: ninbuf = 0; ! 995: cntch = 0; ! 996: cntln = 0; ! 997: cntnull = 0; ! 998: cntodd = 0; ! 999: } ! 1000: ! 1001: /* ! 1002: * Io is finished, close the unit and print statistics. ! 1003: */ ! 1004: iostats() ! 1005: { ! 1006: ! 1007: close(io); ! 1008: io = -1; ! 1009: if (hush == 0) { ! 1010: if (value(TERSE)) ! 1011: ex_printf(" %d/%D", cntln, cntch); ! 1012: else ! 1013: ex_printf(" %d line%s, %D character%s", cntln, plural((long) cntln), ! 1014: cntch, plural(cntch)); ! 1015: if (cntnull || cntodd) { ! 1016: ex_printf(" ("); ! 1017: if (cntnull) { ! 1018: ex_printf("%D null", cntnull); ! 1019: if (cntodd) ! 1020: ex_printf(", "); ! 1021: } ! 1022: if (cntodd) ! 1023: ex_printf("%D non-ASCII", cntodd); ! 1024: ex_putchar(')'); ! 1025: } ! 1026: noonl(); ! 1027: flush(); ! 1028: } ! 1029: return (cntnull != 0 || cntodd != 0); ! 1030: } ! 1031: ! 1032: #ifdef USG ! 1033: # define index strchr ! 1034: # define rindex strrchr ! 1035: #endif ! 1036: #ifdef USG3TTY ! 1037: # define index strchr ! 1038: # define rindex strrchr ! 1039: #endif ! 1040: #ifdef vms ! 1041: # define index strchr ! 1042: # define rindex strrchr ! 1043: #endif ! 1044: ! 1045: checkmodeline(l) ! 1046: char *l; ! 1047: { ! 1048: char *beg, *end; ! 1049: char cmdbuf[1024]; ! 1050: char *index(), *rindex(), *strncpy(); ! 1051: ! 1052: beg = index(l, ':'); ! 1053: if (beg == NULL) ! 1054: return; ! 1055: if (&beg[-3] < l) ! 1056: return; ! 1057: if (!( ( (beg[-3] == ' ' || beg[-3] == '\t') ! 1058: && beg[-2] == 'e' ! 1059: && beg[-1] == 'x') ! 1060: || ( (beg[-3] == ' ' || beg[-3] == '\t') ! 1061: && beg[-2] == 'v' ! 1062: && beg[-1] == 'i'))) return; ! 1063: strncpy(cmdbuf, beg+1, sizeof cmdbuf); ! 1064: end = rindex(cmdbuf, ':'); ! 1065: if (end == NULL) ! 1066: return; ! 1067: *end = 0; ! 1068: globp = cmdbuf; ! 1069: commands(1, 1); ! 1070: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.