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1.1 root 1: /* sysh.unx -*- C -*-
2: The header file for the UNIX system dependent routines.
3:
4: Copyright (C) 1991, 1992 Ian Lance Taylor
5:
6: This file is part of the Taylor UUCP package.
7:
8: This program is free software; you can redistribute it and/or
9: modify it under the terms of the GNU General Public License as
10: published by the Free Software Foundation; either version 2 of the
11: License, or (at your option) any later version.
12:
13: This program is distributed in the hope that it will be useful, but
14: WITHOUT ANY WARRANTY; without even the implied warranty of
15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16: General Public License for more details.
17:
18: You should have received a copy of the GNU General Public License
19: along with this program; if not, write to the Free Software
20: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21:
22: The author of the program may be contacted at [email protected] or
23: c/o Infinity Development Systems, P.O. Box 520, Waltham, MA 02254.
24: */
25:
26: #ifndef SYSH_UNX_H
27:
28: #define SYSH_UNX_H
29:
30: #if ANSI_C
31: /* These structures are used in prototypes but are not defined in this
32: header file. */
33: struct uuconf_system;
34: struct sconnection;
35: #endif
36:
37: /* Make sure the defines do not conflict. These are in this file
38: because they are Unix dependent. */
39: #if HAVE_V2_LOCKFILES + HAVE_HDB_LOCKFILES + HAVE_SCO_LOCKFILES + HAVE_SVR4_LOCKFILES + HAVE_COHERENT_LOCKFILES != 1
40: #error LOCKFILES define not set or duplicated
41: #endif
42:
43: /* SCO and SVR4 lockfiles are basically just like HDB lockfiles. */
44: #if HAVE_SCO_LOCKFILES || HAVE_SVR4_LOCKFILES
45: #undef HAVE_HDB_LOCKFILES
46: #define HAVE_HDB_LOCKFILES 1
47: #endif
48:
49: #if HAVE_BSD_TTY + HAVE_SYSV_TERMIO + HAVE_POSIX_TERMIOS != 1
50: #error Terminal driver define not set or duplicated
51: #endif
52:
53: #if SPOOLDIR_V2 + SPOOLDIR_BSD42 + SPOOLDIR_BSD43 + SPOOLDIR_HDB + SPOOLDIR_ULTRIX + SPOOLDIR_SVR4 + SPOOLDIR_TAYLOR != 1
54: #error Spool directory define not set or duplicated
55: #endif
56:
57: /* If setreuid is broken, don't use it. */
58: #if HAVE_BROKEN_SETREUID
59: #undef HAVE_SETREUID
60: #define HAVE_SETREUID 0
61: #endif
62:
63: /* Get some standard types from the configuration header file. */
64: /*
65: #ifdef PID_T
66: typedef PID_T pid_t;
67: #endif
68:
69: #ifdef UID_T
70: typedef UID_T uid_t;
71: #endif
72:
73: #ifdef GID_T
74: typedef GID_T gid_t;
75: #endif
76:
77: #ifdef OFF_T
78: typedef OFF_T off_t;
79: #endif
80:
81: */
82:
83: /* On Unix, binary files are the same as text files. */
84: #define BINREAD "r"
85: #define BINWRITE "w"
86:
87: /* If we have sigaction, we can force system calls to not be
88: restarted. */
89: #if HAVE_SIGACTION
90: #undef HAVE_RESTARTABLE_SYSCALLS
91: #define HAVE_RESTARTABLE_SYSCALLS 0
92: #endif
93:
94: /* If we have sigvec, and we have HAVE_SIGVEC_SV_FLAGS, and
95: SV_INTERRUPT is defined, we can force system calls to not be
96: restarted (signal.h is included by uucp.h before this point, so
97: SV_INTERRUPT will be defined by now if it it ever is). */
98: #if HAVE_SIGVEC && HAVE_SIGVEC_SV_FLAGS
99: #ifdef SV_INTERRUPT
100: #undef HAVE_RESTARTABLE_SYSCALLS
101: #define HAVE_RESTARTABLE_SYSCALLS 0
102: #endif
103: #endif
104:
105: /* If we were cross-configured, we will have a value of -1 for
106: HAVE_RESTARTABLE_SYSCALLS. In this case, we try to guess what the
107: correct value should be. Yuck. If we have sigvec, but neither of
108: the above cases applied (which we know because they would have
109: changed HAVE_RESTARTABLE_SYSCALLS) then we are probably on 4.2BSD
110: and system calls are automatically restarted. Otherwise, assume
111: that they are not. */
112: #if HAVE_RESTARTABLE_SYSCALLS == -1
113: #undef HAVE_RESTARTABLE_SYSCALLS
114: #if HAVE_SIGVEC
115: #define HAVE_RESTARTABLE_SYSCALLS 1
116: #else
117: #define HAVE_RESTARTABLE_SYSCALLS 0
118: #endif
119: #endif /* HAVE_RESTARTABLE_SYSCALLS == -1 */
120:
121: /* We don't handle sigset in combination with restartable system
122: calls, so we check for it although this combination will never
123: happen. */
124: #if ! HAVE_SIGACTION && ! HAVE_SIGVEC && HAVE_SIGSET
125: #if HAVE_RESTARTABLE_SYSCALLS
126: #undef HAVE_SIGSET
127: #define HAVE_SIGSET 0
128: #endif
129: #endif
130:
131: /* If we don't have restartable system calls, we can ignore
132: fsysdep_catch, usysdep_start_catch and usysdep_end_catch.
133: Otherwise fsysdep_catch has to do a setjmp. */
134:
135: #if ! HAVE_RESTARTABLE_SYSCALLS
136:
137: #define fsysdep_catch() (TRUE)
138: #define usysdep_start_catch()
139: #define usysdep_end_catch()
140: #define CATCH_PROTECT
141:
142: #else /* HAVE_RESTARTABLE_SYSCALLS */
143:
144: #if HAVE_SETRET && ! HAVE_SIGSETJMP
145: #include <setret.h>
146: #define setjmp setret
147: #define longjmp longret
148: #define jmp_buf ret_buf
149: #else /* ! HAVE_SETRET || HAVE_SIGSETJMP */
150: #include <setjmp.h>
151: #if HAVE_SIGSETJMP
152: #undef setjmp
153: #undef longjmp
154: #undef jmp_buf
155: #define setjmp(s) sigsetjmp ((s), TRUE)
156: #define longjmp siglongjmp
157: #define jmp_buf sigjmp_buf
158: #endif /* HAVE_SIGSETJMP */
159: #endif /* ! HAVE_SETRET || HAVE_SIGSETJMP */
160:
161: extern volatile sig_atomic_t fSjmp;
162: extern volatile jmp_buf sSjmp_buf;
163:
164: #define fsysdep_catch() (setjmp (sSjmp_buf) == 0)
165:
166: #define usysdep_start_catch() (fSjmp = TRUE)
167:
168: #define usysdep_end_catch() (fSjmp = FALSE)
169:
170: #define CATCH_PROTECT volatile
171:
172: #endif /* HAVE_RESTARTABLE_SYSCALLS */
173:
174: /* Get definitions for the terminal driver. */
175:
176: #if HAVE_BSD_TTY
177: #include <sgtty.h>
178: struct sbsd_terminal
179: {
180: struct sgttyb stty;
181: struct tchars stchars;
182: struct ltchars sltchars;
183: };
184: typedef struct sbsd_terminal sterminal;
185: #define fgetterminfo(o, q) \
186: (ioctl ((o), TIOCGETP, &(q)->stty) == 0 \
187: && ioctl ((o), TIOCGETC, &(q)->stchars) == 0 \
188: && ioctl ((o), TIOCGLTC, &(q)->sltchars) == 0)
189: #define fsetterminfo(o, q) \
190: (ioctl ((o), TIOCSETN, &(q)->stty) == 0 \
191: && ioctl ((o), TIOCSETC, &(q)->stchars) == 0 \
192: && ioctl ((o), TIOCSLTC, &(q)->sltchars) == 0)
193: #define fsetterminfodrain(o, q) \
194: (ioctl ((o), TIOCSETP, &(q)->stty) == 0 \
195: && ioctl ((o), TIOCSETC, &(q)->stchars) == 0 \
196: && ioctl ((o), TIOCSLTC, &(q)->sltchars) == 0)
197: #endif /* HAVE_BSD_TTY */
198:
199: #if HAVE_SYSV_TERMIO
200: #include <termio.h>
201: typedef struct termio sterminal;
202: #define fgetterminfo(o, q) (ioctl ((o), TCGETA, (q)) == 0)
203: #define fsetterminfo(o, q) (ioctl ((o), TCSETA, (q)) == 0)
204: #define fsetterminfodrain(o, q) (ioctl ((o), TCSETAW, (q)) == 0)
205: #endif /* HAVE_SYSV_TERMIO */
206:
207: #if HAVE_POSIX_TERMIOS
208: #include <termios.h>
209: typedef struct termios sterminal;
210: #define fgetterminfo(o, q) (tcgetattr ((o), (q)) == 0)
211: #define fsetterminfo(o, q) (tcsetattr ((o), TCSANOW, (q)) == 0)
212: #define fsetterminfodrain(o, q) (tcsetattr ((o), TCSADRAIN, (q)) == 0)
213:
214: /* On some systems it is not possible to include both <sys/ioctl.h>
215: and <termios.h> in the same source files; I don't really know why.
216: On such systems, we pretend that we don't have <sys/ioctl.h>. */
217: #if ! HAVE_TERMIOS_AND_SYS_IOCTL_H
218: #undef HAVE_SYS_IOCTL_H
219: #define HAVE_SYS_IOCTL_H 0
220: #endif
221:
222: #endif /* HAVE_POSIX_TERMIOS */
223:
224: /* The root directory (this is needed by the system independent stuff
225: as the default for local-send). */
226: #define ZROOTDIR "/"
227:
228: /* The name of the execution directory within the spool directory
229: (this is need by the system independent uuxqt.c). */
230: #define XQTDIR ".Xqtdir"
231:
232: /* The name of the directory in which we preserve file transfers that
233: failed. */
234: #define PRESERVEDIR ".Preserve"
235:
236: /* The length of the sequence number used in a file name. */
237: #define CSEQLEN (4)
238:
239: /* Get some standard definitions. Avoid including the files more than
240: once--some might have been included by uucp.h. */
241: #if USE_STDIO && HAVE_UNISTD_H
242: #include <unistd.h>
243: #endif
244: #if ! USE_TYPES_H
245: #include <sys/types.h>
246: #endif
247: #include <sys/stat.h>
248:
249: /* Get definitions for the file permission bits. */
250:
251: #ifndef S_IRWXU
252: #define S_IRWXU 0700
253: #endif
254: #ifndef S_IRUSR
255: #define S_IRUSR 0400
256: #endif
257: #ifndef S_IWUSR
258: #define S_IWUSR 0200
259: #endif
260: #ifndef S_IXUSR
261: #define S_IXUSR 0100
262: #endif
263:
264: #ifndef S_IRWXG
265: #define S_IRWXG 0070
266: #endif
267: #ifndef S_IRGRP
268: #define S_IRGRP 0040
269: #endif
270: #ifndef S_IWGRP
271: #define S_IWGRP 0020
272: #endif
273: #ifndef S_IXGRP
274: #define S_IXGRP 0010
275: #endif
276:
277: #ifndef S_IRWXO
278: #define S_IRWXO 0007
279: #endif
280: #ifndef S_IROTH
281: #define S_IROTH 0004
282: #endif
283: #ifndef S_IWOTH
284: #define S_IWOTH 0002
285: #endif
286: #ifndef S_IXOTH
287: #define S_IXOTH 0001
288: #endif
289:
290: #ifndef S_ISDIR
291: #ifdef S_IFDIR
292: #define S_ISDIR(i) (((i) & S_IFMT) == S_IFDIR)
293: #else /* ! defined (S_IFDIR) */
294: #define S_ISDIR(i) (((i) & 0170000) == 040000)
295: #endif /* ! defined (S_IFDIR) */
296: #endif /* ! defined (S_ISDIR) */
297:
298: /* We need the access macros. */
299: #ifndef R_OK
300: #define R_OK 4
301: #define W_OK 2
302: #define X_OK 1
303: #define F_OK 0
304: #endif /* ! defined (R_OK) */
305:
306: /* We create files with these modes (should this be configurable?). */
307: #define IPRIVATE_FILE_MODE (S_IRUSR | S_IWUSR)
308: #define IPUBLIC_FILE_MODE (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)
309:
310: /* We create directories with this mode (should this be configurable?). */
311: #define IDIRECTORY_MODE (S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)
312: #define IPUBLIC_DIRECTORY_MODE (S_IRWXU | S_IRWXG | S_IRWXO)
313:
314: #if ! HAVE_OPENDIR
315:
316: /* Define some structures to use if we don't have opendir, etc. These
317: will only work if we have the old Unix filesystem, with a 2 byte
318: inode and a 14 byte filename. */
319:
320: #include <sys/dir.h>
321:
322: struct dirent
323: {
324: char d_name[DIRSIZ + 1];
325: };
326:
327: typedef struct
328: {
329: int o;
330: struct dirent s;
331: } DIR;
332:
333: extern DIR *opendir P((const char *zdir));
334: extern struct dirent *readdir P((DIR *));
335: extern int closedir P((DIR *));
336:
337: #endif /* ! HAVE_OPENDIR */
338:
339: #if ! HAVE_FTW_H
340:
341: /* If there is no <ftw.h>, define the ftw constants. */
342:
343: #define FTW_F (0)
344: #define FTW_D (1)
345: #define FTW_DNR (2)
346: #define FTW_NS (3)
347:
348: #endif /* ! HAVE_FTW_H */
349:
350: /* This structure holds the system dependent information we keep for a
351: connection. This is used by the TCP and TLI code. */
352:
353: struct ssysdep_conn
354: {
355: /* File descriptor. */
356: int o;
357: /* Device name. */
358: char *zdevice;
359: /* File status flags. */
360: int iflags;
361: /* File status flags for descriptor 1 (-1 if not standard input). */
362: int istdout_flags;
363: /* Hold the real descriptor when using a dialer device. */
364: int ohold;
365: /* TRUE if this is a terminal and the remaining fields are valid. */
366: boolean fterminal;
367: /* TRUE if this is a TLI descriptor. */
368: boolean ftli;
369: /* Baud rate. */
370: long ibaud;
371: /* Original terminal settings. */
372: sterminal sorig;
373: /* Current terminal settings. */
374: sterminal snew;
375: #if HAVE_COHERENT_LOCKFILES
376: /* On Coherent we need to hold on to the real port name which will
377: be used to enable the port. Ick. */
378: char *zenable;
379: #endif
380: };
381:
382: /* These functions do I/O and chat scripts to a port. They are called
383: by the TCP and TLI routines. */
384: extern boolean fsysdep_conn_read P((struct sconnection *qconn,
385: char *zbuf, size_t *pclen,
386: size_t cmin, int ctimeout,
387: boolean freport));
388: extern boolean fsysdep_conn_write P((struct sconnection *qconn,
389: const char *zbuf, size_t clen));
390: extern boolean fsysdep_conn_io P((struct sconnection *qconn,
391: const char *zwrite, size_t *pcwrite,
392: char *zread, size_t *pcread));
393: extern boolean fsysdep_conn_chat P((struct sconnection *qconn,
394: char **pzprog));
395:
396: /* Set a signal handler. */
397: extern void usset_signal P((int isig, RETSIGTYPE (*pfn) P((int)),
398: boolean fforce, boolean *pfignored));
399:
400: /* Default signal handler. This sets the appropriate element of the
401: afSignal array. If system calls are automatically restarted, it
402: may do a longjmp to an fsysdep_catch. */
403: extern RETSIGTYPE ussignal P((int isig));
404:
405: /* Try to fork, repeating several times. */
406: extern pid_t ixsfork P((void));
407:
408: /* Spawn a job. Returns the process ID of the spawned job or -1 on
409: error. The following macros may be passed in aidescs. */
410:
411: /* Set descriptor to /dev/null. */
412: #define SPAWN_NULL (-1)
413: /* Set element of aidescs to a pipe for caller to read from. */
414: #define SPAWN_READ_PIPE (-2)
415: /* Set element of aidescs to a pipe for caller to write to. */
416: #define SPAWN_WRITE_PIPE (-3)
417:
418: extern pid_t ixsspawn P((const char **pazargs, int *aidescs,
419: boolean fkeepuid, boolean fkeepenv,
420: const char *zchdir, boolean fnosigs,
421: boolean fshell, const char *zpath,
422: const char *zuu_machine,
423: const char *zuu_user));
424:
425: /* Do a form of popen using ixsspawn. */
426: extern FILE *espopen P((const char **pazargs, boolean frd,
427: pid_t *pipid));
428:
429: /* Wait for a particular process to finish, returning the exit status.
430: The process ID should be pid_t, but we can't put that in a
431: prototype. */
432: extern int ixswait P((unsigned long ipid, const char *zreport));
433:
434: /* Find a spool file in the spool directory. For a local file, the
435: bgrade argument is the grade of the file. This is needed for
436: SPOOLDIR_SVR4. */
437: extern char *zsfind_file P((const char *zsimple, const char *zsystem,
438: int bgrade));
439:
440: /* Return the grade given a sequence number. */
441: extern char bsgrade P((pointer pseq));
442:
443: /* Lock a string. */
444: extern boolean fsdo_lock P((const char *, boolean fspooldir,
445: boolean *pferr));
446:
447: /* Unlock a string. */
448: extern boolean fsdo_unlock P((const char *, boolean fspooldir));
449:
450: /* Check access for a particular user name, or NULL to check access
451: for any user. */
452: extern boolean fsuser_access P((const struct stat *, int imode,
453: const char *zuser));
454:
455: /* Stick two directories and a file name together. */
456: extern char *zsappend3 P((const char *zdir1, const char *zdir2,
457: const char *zfile));
458:
459: /* Stick three directories and a file name together. */
460: extern char *zsappend4 P((const char *zdir1, const char *zdir2,
461: const char *zdir3, const char *zfile));
462:
463: /* Get a temporary file name. */
464: extern char *zstemp_file P((const struct uuconf_system *qsys));
465:
466: /* Get a command file name. */
467: extern char *zscmd_file P((const struct uuconf_system *qsys, int bgrade));
468:
469: /* Get a jobid from a system, a file name, and a grade. */
470: extern char *zsfile_to_jobid P((const struct uuconf_system *qsys,
471: const char *zfile,
472: int bgrade));
473:
474: /* Get a file name from a jobid. This also returns the associated system
475: in *pzsystem and the grade in *pbgrade. */
476: extern char *zsjobid_to_file P((const char *zid, char **pzsystem,
477: char *pbgrade));
478:
479: /* See whether there is a spool directory for a system when using
480: SPOOLDIR_ULTRIX. */
481: extern boolean fsultrix_has_spool P((const char *zsystem));
482:
483: #if HAVE_COHERENT_LOCKFILES
484: /* Lock a coherent tty. */
485: extern boolean lockttyexist P((const char *z));
486: extern boolean fscoherent_disable_tty P((const char *zdevice,
487: char **pzenable));
488: #endif
489:
490: /* Some replacements for standard Unix functions. */
491:
492: #if ! HAVE_DUP2
493: extern int dup2 P((int oold, int onew));
494: #endif
495:
496: #if ! HAVE_FTW
497: extern int ftw P((const char *zdir,
498: int (*pfn) P((const char *zfile,
499: const struct stat *qstat,
500: int iflag)),
501: int cdescriptors));
502: #endif
503:
504: #if ! HAVE_GETCWD && ! HAVE_GETWD
505: extern char *getcwd P((char *zbuf, size_t cbuf));
506: #endif
507:
508: #if ! HAVE_MKDIR
509: extern int mkdir P((const char *zdir, int imode));
510: #endif
511:
512: #if ! HAVE_RENAME
513: extern int rename P((const char *zold, const char *znew));
514: #endif
515:
516: #if ! HAVE_RMDIR
517: extern int rmdir P((const char *zdir));
518: #endif
519:
520: /* The working directory from which the program was run (this is set
521: by usysdep_initialize if called with INIT_GETCWD). */
522: extern char *zScwd;
523:
524: /* The spool directory name. */
525: extern const char *zSspooldir;
526:
527: /* The lock directory name. */
528: extern const char *zSlockdir;
529:
530: /* The local UUCP name (needed for some spool directory stuff). */
531: extern const char *zSlocalname;
532:
533: #endif /* ! defined (SYSH_UNX_H) */
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