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Added (limited) support for implicit annotations.
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885824d3 1/*
2** posix.h
3**
4** This file should be processed with one of the standard libraries
5** (standard.h or strict.h) to produce posix.lcd or posixstrict.lcd.
6*/
7
8/*@-nextlinemacros@*/
9/*@+allimponly@*/
10/*@+globsimpmodifiesnothing@*/
11
12/*
13 * LCLint ISO C + POSIX Library
14 *
15 * $Id$
16 */
17
18/*
19 * In 1988, IEEE Std 1003.1-1988, commonly known as "POSIX" or the
20 * "IEEE Portable Operating System Interface for Computing Environments"
21 * was published as an American National Standard. In 1990, IEEE Std
22 * 1003.1-1990 was published as an International Standard. The two
23 * standards differ slightly, and where they do, the 1990 International
24 * standard was used for this lclint library. The differences are:
25 *
26 * 1988: cuserid()
27 * 1990: -removed- (but still in this lclint library)
28 *
29 * 1988: int read (int, void*, unsigned int)
30 * 1990: ssize_t read (int, void*, size_t)
31 *
32 * 1988: int write (int, const void*, unsigned int)
33 * 1990: ssize_t write (int, const void*, size_t)
34 *
35 * The other differences are in the semantics of functions.
36 */
37
38/*
39 * The reference for the ISO C part of this library was
40 * Plauger, Brodie's "Standard C - A Reference", Prentice Hall.
41 * The reference for the POSIX part of this library was
42 * Donald Lewine's "POSIX Programmer's Guide", O'Reilly.
43 * Transcription by Jens Schweikhardt <schweikhardt@rus.uni-stuttgart.de>
44 */
45
46/*
47 * Note that Amendment 1 to ISO C was published in 1995 after POSIX was out.
48 * Amendment 1 basically adds support for wide characters and iso 646
49 * source character sets. In particular, there are three new headers:
50 * <iso646.h>, <wchar.h>, and <wctype.h>
51 */
52
53/*
54 * Each header has annotations in this order:
55 *
56 * 1) type definitions (if any)
57 * 2) constant definitions (if any)
58 * 3) structure definitions (if any)
59 * 4) function prototypes and externals (if any)
60 *
61 * 5) type definitions augmented by POSIX (if any)
62 * 6) constant definitions augmented by POSIX (if any)
63 * 7) structure definitions augmented by POSIX (if any)
64 * 8) function prototypes and externals augmented by POSIX (if any)
65 *
66 * Builtins are mentioned in the header where they appear according to ISO.
67 */
68
69/*
70** sys/types.h
71*/
72
73typedef /*@integraltype@*/ dev_t;
74typedef /*@integraltype@*/ gid_t;
75typedef /*@integraltype@*/ ino_t;
76typedef /*@integraltype@*/ mode_t;
77typedef /*@integraltype@*/ nlink_t;
78typedef /*@integraltype@*/ off_t;
79typedef /*@integraltype@*/ pid_t;
80typedef /*@integraltype@*/ uid_t;
81
82/*
83** dirent.h
84*/
85
86typedef /*@abstract@*/ /*@mutable@*/ void *DIR;
87
88struct dirent {
89 char d_name[];
90};
91
92 extern int
93closedir (DIR *dirp)
94 /*@modifies errno@*/;
95
96 extern /*@null@*/ DIR *
97opendir (const char *dirname)
98 /*@modifies errno@*/;
99
100 extern /*@null@*/ struct dirent *
101readdir (DIR *dirp)
102 /*@modifies errno@*/;
103
104 extern void
105rewinddir (DIR *dirp)
106 /*@*/;
107
108/*
109** errno.h
110*/
111
112/*@constant int E2BIG@*/
113/*@constant int EACCES@*/
114/*@constant int EAGAIN@*/
115/*@constant int EBADF@*/
116/*@constant int EBUSY@*/
117/*@constant int ECHILD@*/
118/*@constant int EDEADLK@*/
119/*@constant int EEXIST@*/
120/*@constant int EFAULT@*/
121/*@constant int EFBIG@*/
122/*@constant int EINTR@*/
123/*@constant int EINVAL@*/
124/*@constant int EIO@*/
125/*@constant int EISDIR@*/
126/*@constant int EMFILE@*/
127/*@constant int EMLINK@*/
128/*@constant int ENAMETOOLONG@*/
129/*@constant int ENFILE@*/
130/*@constant int ENODEV@*/
131/*@constant int ENOENT@*/
132/*@constant int ENOEXEC@*/
133/*@constant int ENOLCK@*/
134/*@constant int ENOMEM@*/
135/*@constant int ENOSPC@*/
136/*@constant int ENOSYS@*/
137/*@constant int ENOTDIR@*/
138/*@constant int ENOTEMPTY@*/
139/*@constant int ENOTTY@*/
140/*@constant int ENXIO@*/
141/*@constant int EPERM@*/
142/*@constant int EPIPE@*/
143/*@constant int EROFS@*/
144/*@constant int ESPIPE@*/
145/*@constant int ESRCH@*/
146/*@constant int EXDEV@*/
147
148/*
149** fcntl.h
150*/
151
152/*@constant int FD_CLOEXEC@*/
153/*@constant int F_DUPFD@*/
154/*@constant int F_GETFD@*/
155/*@constant int F_GETFL@*/
156/*@constant int F_GETLK@*/
157/*@constant int F_RDLCK@*/
158/*@constant int F_SETFD@*/
159/*@constant int F_SETFL@*/
160/*@constant int F_SETLK@*/
161/*@constant int F_SETLKW@*/
162/*@constant int F_UNLCK@*/
163/*@constant int F_WRLCK@*/
164/*@constant int O_ACCMODE@*/
165/*@constant int O_APPEND@*/
166/*@constant int O_CREAT@*/
167/*@constant int O_EXCL@*/
168/*@constant int O_NOCTTY@*/
169/*@constant int O_NONBLOCK@*/
170/*@constant int O_RDONLY@*/
171/*@constant int O_RDWR@*/
172/*@constant int O_TRUNC@*/
173/*@constant int O_WRONLY@*/
174/*@constant int SEEK_CUR@*/
175/*@constant int SEEK_END@*/
176/*@constant int SEEK_SET@*/
177/*@constant int S_IRGRP@*/
178/*@constant int S_IROTH@*/
179/*@constant int S_IUSR@*/
180/*@constant int S_IWXG@*/
181/*@constant int S_IWXO@*/
182/*@constant int S_IWXU@*/
183/*@constant int S_ISGID@*/
184/*@constant int S_ISUID@*/
185/*@constant int S_IWGRP@*/
186/*@constant int S_IWOTH@*/
187/*@constant int S_IWUSR@*/
188/*@constant int S_IXGRP@*/
189/*@constant int S_IXOTH@*/
190/*@constant int S_IXUSR@*/
191
192struct flock {
193 short l_type;
194 short l_whence;
195 off_t l_start;
196 off_t l_len;
197 pid_t l_pid;
198};
199
200 extern int
201creat (const char *path, mode_t mode)
202 /*@modifies errno@*/;
203
204 extern int
205fcntl (int fd, int cmd, ...)
206 /*@modifies errno@*/;
207
208 extern int
209open (const char *path, int oflag, ...)
210 /*@modifies errno@*/;
211
212/*
213** grp.h
214*/
215
216struct group {
217 char *gr_name;
218 gid_t gr_gid;
219 char **gr_mem;
220};
221
222 extern /*@null@*/ struct group *
223getgrgid (gid_t gid)
224 /*@modifies errno@*/;
225
226 extern /*@null@*/ struct group *
227getgrnam (const char *nm)
228 /*@modifies errno@*/;
229
230/*
231** limits.h
232*/
233
234/*@constant long ARG_MAX@*/
235/*@constant long CHILD_MAX@*/
236/*@constant long LINK_MAX@*/
237/*@constant long MAX_CANON@*/
238/*@constant long MAX_INPUT@*/
239/*@constant long NAME_MAX@*/
240/*@constant long NGROUPS_MAX@*/
241/*@constant long OPEN_MAX@*/
242/*@constant long PIPE_BUF@*/
243/*@constant long SSIZE_MAX@*/
244/*@constant long STREAM_MAX@*/
245/*@constant long TZNAME_MAX@*/
246/*@constant long _POSIX_ARG_MAX@*/
247/*@constant long _POSIX_CHILD_MAX@*/
248/*@constant long _POSIX_LINK_MAX@*/
249/*@constant long _POSIX_MAX_CANON@*/
250/*@constant long _POSIX_MAX_INPUT@*/
251/*@constant long _POSIX_NAME_MAX@*/
252/*@constant long _POSIX_NGROUPS_MAX@*/
253/*@constant long _POSIX_OPEN_MAX@*/
254/*@constant long _POSIX_PATH_MAX@*/
255/*@constant long _POSIX_PIPE_BUF@*/
256/*@constant long _POSIX_SSIZE@*/
257/*@constant long _POSIX_STREAM@*/
258/*@constant long _POSIX_TZNAME_MAX@*/
259
260/*
261** pwd.h
262*/
263
264struct passwd {
265 char *pw_name;
266 uid_t pw_uid;
267 gid_t pw_gid;
268 char *pw_dir;
269 char *pw_shell;
270} ;
271
272 extern /*@observer@*/ /*@null@*/ struct passwd *
273getpwnam (const char *)
274 /*@modifies errno@*/;
275
276 extern /*@observer@*/ /*@null@*/ struct passwd *
277getpwuid (uid_t uid)
278 /*@modifies errno@*/;
279
280/*
281** setjmp.h
282*/
283
284typedef /*@abstract@*/ /*@mutable@*/ void *sigjmp_buf;
285
286 extern /*@mayexit@*/ void
287siglongjmp (sigjmp_buf env, int val)
288 /*@*/;
289
290 extern int
291sigsetjmp (/*@out@*/ sigjmp_buf env, int savemask)
292 /*@modifies env@*/;
293
294/*
295** signal.h
296*/
297
298typedef /*@abstract@*/ sigset_t;
299
300/*@constant int SA_NOCLDSTOP@*/
301/*@constant int SIG_BLOCK@*/
302/*@constant int SIG_SETMASK@*/
303/*@constant int SIG_UNBLOCK@*/
304/*@constant int SIGALRM@*/
305/*@constant int SIGCHLD@*/
306/*@constant int SIGCONT@*/
307/*@constant int SIGHUP@*/
308/*@constant int SIGKILL@*/
309/*@constant int SIGPIPE@*/
310/*@constant int SIGQUIT@*/
311/*@constant int SIGSTOP@*/
312/*@constant int SIGTSTP@*/
313/*@constant int SIGTTIN@*/
314/*@constant int SIGTTOU@*/
315/*@constant int SIGUSR1@*/
316/*@constant int SIGUSR2@*/
317
318struct sigaction {
319 void (*sa_handler)();
320 sigset_t sa_mask;
321 int sa_flags;
322} ;
323
324 extern /*@mayexit@*/ int
325kill (pid_t pid, int sig)
326 /*@modifies errno@*/;
327
328 extern int
329sigaction (int sig, const struct sigaction *act, /*@out@*/ /*@null@*/ struct sigaction *oact)
330 /*@modifies *oact, errno, internalState@*/;
331
332 extern int
333sigaddset (sigset_t *set, int signo)
334 /*@modifies *set, errno@*/;
335
336 extern int
337sigdelset (sigset_t *set, int signo)
338 /*@modifies *set, errno@*/;
339
340 extern int
341sigemptyset (/*@out@*/ sigset_t *set)
342 /*@modifies *set, errno@*/;
343
344 extern int
345sigfillset (/*@out@*/ sigset_t *set)
346 /*@modifies *set, errno@*/;
347
348 extern int
349sigismember (const sigset_t *set, int signo)
350 /*@modifies errno@*/;
351
352 extern int
353sigpending (/*@out@*/ sigset_t *set)
354 /*@modifies *set, errno@*/;
355
356 extern int
357sigprocmask (int how, /*@null@*/ const sigset_t *set, /*@null@*/ /*@out@*/ sigset_t *oset)
358 /*@modifies *oset, errno, internalState@*/;
359
360 extern int
361sigsuspend (const sigset_t *sigmask)
362 /*@modifies errno, internalState@*/;
363
364/*
365** stdio.h
366*/
367
368/*@constant int L_ctermid@*/
369/*@constant int L_cuserid@*/
370/*@constant int STREAM_MAX@*/
371
372 extern /*@null@*/ /*@dependent@*/ FILE *
373fdopen (int fd, const char *type)
374 /*@modifies errno, fileSystem@*/;
375
376 extern int
377fileno (FILE *fp)
378 /*@modifies errno@*/;
379
380/*
381** sys/stat.h
382*/
383
384/*@constant int S_IRGRP@*/
385/*@constant int S_IROTH@*/
386/*@constant int S_IUSR@*/
387/*@constant int S_IWXG@*/
388/*@constant int S_IWXO@*/
389/*@constant int S_IWXU@*/
390/*@constant int S_ISGID@*/
391/*@constant int S_ISUID@*/
392/*@constant int S_IWGRP@*/
393/*@constant int S_IWOTH@*/
394/*@constant int S_IWUSR@*/
395/*@constant int S_IXGRP@*/
396/*@constant int S_IXOTH@*/
397/*@constant int S_IXUSR@*/
398
399struct stat {
400 mode_t st_mode;
401 ino_t st_ino;
402 dev_t st_dev;
403 nlink_t st_nlink;
404 uid_t st_uid;
405 gid_t st_gid;
406 off_t st_size;
407 time_t st_st_atime;
408 time_t st_st_mtime;
409 time_t st_st_ctime;
410} ;
411
412/*
413** POSIX does not require that the S_I* be functions. They're
414** macros virtually everywhere.
415*/
416
417# ifdef STRICT
418/*@notfunction@*/
419# define SBOOLINT lltX_bool /*@alt int@*/
420# else
421/*@notfunction@*/
422# define SBOOLINT lltX_bool
423# endif
424
425extern SBOOLINT S_ISBLK (/*@sef@*/ mode_t m) /*@*/ ;
426
427extern SBOOLINT S_ISCHR (/*@sef@*/ mode_t m) /*@*/ ;
428
429extern SBOOLINT S_ISDIR (/*@sef@*/ mode_t m) /*@*/ ;
430
431extern SBOOLINT S_ISFIFO (/*@sef@*/ mode_t m) /*@*/ ;
432
433extern SBOOLINT S_ISREG (/*@sef@*/ mode_t m) /*@*/ ;
434
435extern int chmod (const char *path, mode_t mode)
436 /*@modifies fileSystem, errno@*/ ;
437
438extern int fstat (int fd, /*@out@*/ struct stat *buf)
439 /*@modifies errno, *buf@*/ ;
440
441extern int
442mkdir (const char *path, mode_t mode)
443 /*@modifies fileSystem, errno@*/;
444
445 extern int
446mkfifo (const char *path, mode_t mode)
447 /*@modifies fileSystem, errno@*/;
448
449 extern int
450stat (const char *path, /*@out@*/ struct stat *buf)
451 /*@modifies errno, *buf@*/;
452
453 extern int
454umask (mode_t cmask)
455 /*@modifies internalState@*/;
456
457/*
458** sys/times.h
459*/
460
461struct tms {
462 clock_t tms_utime;
463 clock_t tms_stime;
464 clock_t tms_cutime;
465 clock_t tms_cstime;
466};
467
468 extern clock_t
469times (/*@out@*/ struct tms *tp)
470 /*@modifies *tp@*/;
471
472/*
473** sys/utsname.h
474*/
475
476struct utsname {
477 char sysname[];
478 char nodename[];
479 char release[];
480 char version[];
481 char machine[];
482};
483
484 extern int
485uname (/*@out@*/ struct utsname *name)
486 /*@modifies *name, errno@*/ ;
487
488/*
489** sys/wait.h
490*/
491
492extern int WEXITSTATUS (int status) /*@*/ ;
493extern int WIFEXITED (int status) /*@*/ ;
494extern int WIFSIGNALED (int status) /*@*/ ;
495extern int WIFSTOPPED (int status) /*@*/ ;
496extern int WSTOPSIG (int status) /*@*/ ;
497extern int WTERMSIG (int status) /*@*/ ;
498
499/*@constant int WUNTRACED@*/
500
501 extern pid_t
502wait (/*@out@*/ /*@null@*/ int *st)
503 /*@modifies *st, errno@*/;
504
505 extern pid_t
506waitpid (pid_t pid, /*@out@*/ int *st, int opt)
507 /*@modifies *st, errno@*/;
508
509/*
510** termios.h
511*/
512
513typedef unsigned char /*@alt unsigned short@*/ cc_t;
514typedef unsigned long /*@alt long@*/ speed_t;
515typedef unsigned long /*@alt long@*/ tcflag_t;
516
517/*@constant int B0@*/
518/*@constant int B50@*/
519/*@constant int B75@*/
520/*@constant int B110@*/
521/*@constant int B134@*/
522/*@constant int B150@*/
523/*@constant int B200@*/
524/*@constant int B300@*/
525/*@constant int B600@*/
526/*@constant int B1200@*/
527/*@constant int B1800@*/
528/*@constant int B2400@*/
529/*@constant int B4800@*/
530/*@constant int B9600@*/
531/*@constant int B19200@*/
532/*@constant int B38400@*/
533/*@constant int BRKINT@*/
534/*@constant int CLOCAL@*/
535/*@constant int CREAD@*/
536/*@constant int CS5@*/
537/*@constant int CS6@*/
538/*@constant int CS7@*/
539/*@constant int CS8@*/
540/*@constant int CSIZE@*/
541/*@constant int CSTOPB@*/
542/*@constant int ECHO@*/
543/*@constant int ECHOE@*/
544/*@constant int ECHOK@*/
545/*@constant int ECHONL@*/
546/*@constant int HUPCL@*/
547/*@constant int ICANON@*/
548/*@constant int ICRNL@*/
549/*@constant int IEXTEN@*/
550/*@constant int IGNBRK@*/
551/*@constant int IGNCR@*/
552/*@constant int IGNPAR@*/
553/*@constant int IGNLCR@*/
554/*@constant int INPCK@*/
555/*@constant int ISIG@*/
556/*@constant int ISTRIP@*/
557/*@constant int IXOFF@*/
558/*@constant int IXON@*/
559/*@constant int NCCS@*/
560/*@constant int NOFLSH@*/
561/*@constant int OPOST@*/
562/*@constant int PARENB@*/
563/*@constant int PARMRK@*/
564/*@constant int PARODD@*/
565/*@constant int TCIFLUSH@*/
566/*@constant int TCIOFF@*/
567/*@constant int TCIOFLUSH@*/
568/*@constant int TCION@*/
569/*@constant int TCOFLUSH@*/
570/*@constant int TCSADRAIN@*/
571/*@constant int TCSAFLUSH@*/
572/*@constant int TCSANOW@*/
573/*@constant int TOSTOP@*/
574/*@constant int VEOF@*/
575/*@constant int VEOL@*/
576/*@constant int VERASE@*/
577/*@constant int VINTR@*/
578/*@constant int VKILL@*/
579/*@constant int VMIN@*/
580/*@constant int VQUIT@*/
581/*@constant int VSTART@*/
582/*@constant int VSTOP@*/
583/*@constant int VSUSP@*/
584/*@constant int VTIME@*/
585
586struct termios {
587 tcflag_t c_iflag;
588 tcflag_t c_oflag;
589 tcflag_t c_cflag;
590 tcflag_t c_lflag;
591 cc_t c_cc;
592} ;
593
594 extern speed_t
595cfgetispeed (const struct termios *p)
596 /*@*/;
597
598 extern speed_t
599cfgetospeed (const struct termios *p)
600 /*@*/;
601
602 extern int
603cfsetispeed (struct termios *p)
604 /*@modifies *p@*/;
605
606 extern int
607cfsetospeed (struct termios *p)
608 /*@modifies *p@*/;
609
610 extern int
611tcdrain (int fd)
612 /*@modifies errno@*/;
613
614 extern int
615tcflow (int fd, int action)
616 /*@modifies errno@*/;
617
618 extern int
619tcflush (int fd, int qs)
620 /*@modifies errno@*/;
621
622 extern int
623tcgetattr (int fd, /*@out@*/ struct termios *p)
624 /*@modifies errno, *p@*/;
625
626 extern int
627tcsendbreak (int fd, int d)
628 /*@modifies errno@*/;
629
630 extern int
631tcsetattr (int fd, int opt, const struct termios *p)
632 /*@modifies errno@*/;
633
634/*
635** time.h
636*/
637
638/* Environ must be known before it can be used in `globals' clauses. */
639
640/*@unchecked@*/ extern char **environ;
641
642/*@constant int CLK_TCK@*/
643
644 extern void
645tzset (void)
646 /*@globals environ@*/ /*@modifies internalState@*/;
647
648/*
649** unistd.h
650*/
651
652/*@constant int F_OK@*/
653/*@constant int R_OK@*/
654/*@constant int SEEK_CUR@*/
655/*@constant int SEEK_END@*/
656/*@constant int SEEK_SET@*/
657/*@constant int STDERR_FILENO@*/
658/*@constant int STDIN_FILENO@*/
659/*@constant int STDOUT_FILENO@*/
660/*@constant int W_OK@*/
661/*@constant int X_OK@*/
662/*@constant int _PC_CHOWN_RESTRUCTED@*/
663/*@constant int _PC_MAX_CANON@*/
664/*@constant int _PC_MAX_INPUT@*/
665/*@constant int _PC_NAME_MAX@*/
666/*@constant int _PC_NO_TRUNC@*/
667/*@constant int _PC_PATH_MAX@*/
668/*@constant int _PC_PIPE_BUF@*/
669/*@constant int _PC_VDISABLE@*/
670/*@constant int _POSIX_CHOWN_RESTRICTED@*/
671/*@constant int _POSIX_JOB_CONTROL@*/
672/*@constant int _POSIX_NO_TRUNC@*/
673/*@constant int _POSIX_SAVED_IDS@*/
674/*@constant int _POSIX_VDISABLE@*/
675/*@constant int _POSIX_VERSION@*/
676/*@constant int _SC_ARG_MAX@*/
677/*@constant int _SC_CHILD_MAX@*/
678/*@constant int _SC_CLK_TCK@*/
679/*@constant int _SC_JOB_CONTROL@*/
680/*@constant int _SC_NGROUPS_MAX@*/
681/*@constant int _SC_OPEN_MAX@*/
682/*@constant int _SC_SAVED_IDS@*/
683/*@constant int _SC_STREAM_MAX@*/
684/*@constant int _SC_TZNAME_MAX@*/
685/*@constant int _SC_VERSION@*/
686
687 extern /*@exits@*/ void
688_exit (int status)
689 /*@*/;
690
691 extern int
692access (const char *path, int mode)
693 /*@modifies errno@*/;
694
695 extern unsigned int
696alarm (unsigned int)
697 /*@modifies internalState@*/;
698
699 extern int
700chdir (const char *path)
701 /*@modifies errno@*/;
702
703 extern int
704chown (const char *path, uid_t owner, gid_t group)
705 /*@modifies fileSystem, errno@*/;
706
707 extern int
708close (int fd)
709 /*@modifies fileSystem, errno, internalState@*/;
710 /* state: record locks are unlocked */
711
712 extern char *
713ctermid (/*@returned@*/ /*@out@*/ /*@null@*/ char *s)
714 /*@modifies *s, internalState@*/;
715
716 /* cuserid is in the 1988 version of POSIX but removed in 1990 */
717 extern char *
718cuserid (/*@null@*/ /*@out@*/ char *s)
719 /*@modifies *s@*/;
720
721 extern int
722dup2 (int fd, int fd2)
723 /*@modifies errno, fileSystem@*/;
724
725 extern int
726dup (int fd)
727 /*@modifies errno, fileSystem@*/;
728
729 extern /*@mayexit@*/ int
730execl (const char *path, const char *arg, ...)
731 /*@modifies errno@*/;
732
733 extern /*@mayexit@*/ int
734execle (const char *file, const char *arg, ...)
735 /*@modifies errno@*/;
736
737 extern /*@mayexit@*/ int
738execlp (const char *file, const char *arg, ...)
739 /*@modifies errno@*/;
740
741 extern /*@mayexit@*/ int
742execv (const char *path, char *const argv[])
743 /*@modifies errno@*/;
744
745 extern /*@mayexit@*/ int
746execve (const char *path, char *const argv[], char *const *envp)
747 /*@modifies errno@*/;
748
749 extern /*@mayexit@*/ int
750execvp (const char *file, char *const argv[])
751 /*@modifies errno@*/;
752
753 extern pid_t
754fork (void)
755 /*@modifies fileSystem, errno@*/;
756
757 extern long
758fpathconf (int fd, int name)
759 /*@modifies errno@*/;
760
761 extern char *
762getcwd (/*@returned@*/ /*@out@*/ char *buf, size_t size)
763 /*@modifies errno, *buf@*/;
764
765 extern gid_t
766getegid (void)
767 /*@*/;
768
769 extern uid_t
770geteuid (void)
771 /*@*/;
772
773 extern gid_t
774getgid (void)
775 /*@*/;
776
777 extern int
778getgroups (int gs, /*@out@*/ gid_t gl[])
779 /*@modifies errno, gl[]@*/;
780
781 extern /*@observer@*/ char *
782getlogin (void)
783 /*@*/;
784
785 extern pid_t
786getpgrp (void)
787 /*@*/;
788
789 extern pid_t
790getpid (void)
791 /*@*/;
792
793 extern pid_t
794getppid (void)
795 /*@*/;
796
797 extern uid_t
798getuid (void)
799 /*@*/;
800
801 extern int
802isatty (int fd)
803 /*@*/;
804
805 extern int
806link (const char *o, const char *n)
807 /*@modifies errno, fileSystem@*/;
808
809 extern off_t
810lseek (int fd, off_t offset, int whence)
811 /*@modifies errno@*/;
812
813 extern long
814pathconf (const char *path, int name)
815 /*@modifies errno@*/;
816
817 extern int
818pause (void)
819 /*@modifies errno@*/;
820
821 extern int
822pipe (/*@out@*/ int fd[]) /* Out parameter noticed by Marc Espie. */
823 /*@modifies errno@*/;
824
825 extern ssize_t
826read (int fd, /*@out@*/ void *buf, size_t nbyte)
827 /*@modifies errno, *buf@*/;
828
829 extern int
830rmdir (const char *path)
831 /*@modifies fileSystem, errno@*/;
832
833 extern int
834setgid (gid_t gid)
835 /*@modifies errno, internalState@*/;
836
837 extern int
838setpgid (pid_t pid, pid_t pgid)
839 /*@modifies errno, internalState@*/;
840
841 extern pid_t
842setsid (void)
843 /*@*/;
844
845 extern int
846setuid (uid_t uid)
847 /*@modifies errno, internalState@*/;
848
849 extern unsigned int
850sleep (unsigned int sec)
851 /*@*/;
852
853 extern long
854sysconf (int name)
855 /*@modifies errno@*/;
856
857 extern pid_t
858tcgetpgrp (int fd)
859 /*@modifies errno@*/;
860
861 extern int
862tcsetpgrp (int fd, pid_t pgrpid)
863 /*@modifies errno, internalState@*/;
864
865 /* Q: observer ok? */
866 extern /*@null@*/ /*@observer@*/ char *
867ttyname (int fd)
868 /*@modifies errno@*/;
869
870 extern int
871unlink (const char *path)
872 /*@modifies fileSystem, errno@*/;
873
874 extern ssize_t
875write (int fd, const void *buf, size_t nbyte)
876 /*@modifies errno@*/;
877
878/*
879** utime.h
880*/
881
882struct utimbuf {
883 time_t actime;
884 time_t modtime;
885} ;
886
887 extern int
888utime (const char *path, /*@null@*/ const struct utimbuf *times)
889 /*@modifies fileSystem, errno@*/;
890
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