/* Get file-specific configuration information about PATH. */
extern long int pathconf (const char *__path, int __name)
__THROW __nonnull ((1));
/* Get file-specific configuration about descriptor FD. */
extern long int fpathconf (int __fd, int __name) __THROW;
/* Get the value of the system variable NAME. */
extern long int sysconf (int __name) __THROW;
#ifdef __USE_POSIX2
/* Get the value of the string-valued system variable NAME. */
extern size_t confstr (int __name, char *__buf, size_t __len) __THROW;
#endif
/* Get the process ID of the calling process. */
extern __pid_t getpid (void) __THROW;
/* Get the process ID of the calling process's parent. */
extern __pid_t getppid (void) __THROW;
/* Get the process group ID of the calling process.
This function is different on old BSD. */
#ifndef __FAVOR_BSD
extern __pid_t getpgrp (void) __THROW;
#else
# ifdef __REDIRECT_NTH
extern __pid_t __REDIRECT_NTH (getpgrp, (__pid_t __pid), __getpgid);
# else
# define getpgrp __getpgid
# endif
#endif
/* Get the process group ID of process PID. */
extern __pid_t __getpgid (__pid_t __pid) __THROW;
#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
extern __pid_t getpgid (__pid_t __pid) __THROW;
#endif
/* Set the process group ID of the process matching PID to PGID.
If PID is zero, the current process's process group ID is set.
If PGID is zero, the process ID of the process is used. */
extern int setpgid (__pid_t __pid, __pid_t __pgid) __THROW;
#if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* Both System V and BSD have `setpgrp' functions, but with different
calling conventions. The BSD function is the same as POSIX.1 `setpgid'
(above). The System V function takes no arguments and puts the calling
process in its on group like `setpgid (0, 0)'.
New programs should always use `setpgid' instead.
The default in GNU is to provide the System V function. The BSD
function is available under -D_BSD_SOURCE. */
# ifndef __FAVOR_BSD
/* Set the process group ID of the calling process to its own PID.
This is exactly the same as `setpgid (0, 0)'. */
extern int setpgrp (void) __THROW;
# else
/* Another name for `setpgid' (above). */
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (setpgrp, (__pid_t __pid, __pid_t __pgrp), setpgid);
# else
# define setpgrp setpgid
# endif
# endif /* Favor BSD. */
#endif /* Use SVID or BSD. */
/* Create a new session with the calling process as its leader.
The process group IDs of the session and the calling process
are set to the process ID of the calling process, which is returned. */
extern __pid_t setsid (void) __THROW;
#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
/* Return the session ID of the given process. */
extern __pid_t getsid (__pid_t __pid) __THROW;
#endif
/* Get the real user ID of the calling process. */
extern __uid_t getuid (void) __THROW;
/* Get the effective user ID of the calling process. */
extern __uid_t geteuid (void) __THROW;
/* Get the real group ID of the calling process. */
extern __gid_t getgid (void) __THROW;
/* Get the effective group ID of the calling process. */
extern __gid_t getegid (void) __THROW;
/* If SIZE is zero, return the number of supplementary groups
the calling process is in. Otherwise, fill in the group IDs
of its supplementary groups in LIST and return the number written. */
extern int getgroups (int __size, __gid_t __list[]) __THROW __wur;
#ifdef __USE_GNU
/* Return nonzero iff the calling process is in group GID. */
extern int group_member (__gid_t __gid) __THROW;
#endif
/* Set the user ID of the calling process to UID.
If the calling process is the super-user, set the real
and effective user IDs, and the saved set-user-ID to UID;
if not, the effective user ID is set to UID. */
extern int setuid (__uid_t __uid) __THROW __wur;
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* Set the real user ID of the calling process to RUID,
and the effective user ID of the calling process to EUID. */
extern int setreuid (__uid_t __ruid, __uid_t __euid) __THROW __wur;
#endif
#if defined __USE_BSD || defined __USE_XOPEN2K
/* Set the effective user ID of the calling process to UID. */
extern int seteuid (__uid_t __uid) __THROW __wur;
#endif /* Use BSD. */
/* Set the group ID of the calling process to GID.
If the calling process is the super-user, set the real
and effective group IDs, and the saved set-group-ID to GID;
if not, the effective group ID is set to GID. */
extern int setgid (__gid_t __gid) __THROW __wur;
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* Set the real group ID of the calling process to RGID,
and the effective group ID of the calling process to EGID. */
extern int setregid (__gid_t __rgid, __gid_t __egid) __THROW __wur;
#endif
#if defined __USE_BSD || defined __USE_XOPEN2K
/* Set the effective group ID of the calling process to GID. */
extern int setegid (__gid_t __gid) __THROW __wur;
#endif /* Use BSD. */
#ifdef __USE_GNU
/* Fetch the real user ID, effective user ID, and saved-set user ID,
of the calling process. */
extern int getresuid (__uid_t *__ruid, __uid_t *__euid, __uid_t *__suid)
__THROW;
/* Fetch the real group ID, effective group ID, and saved-set group ID,
of the calling process. */
extern int getresgid (__gid_t *__rgid, __gid_t *__egid, __gid_t *__sgid)
__THROW;
/* Set the real user ID, effective user ID, and saved-set user ID,
of the calling process to RUID, EUID, and SUID, respectively. */
extern int setresuid (__uid_t __ruid, __uid_t __euid, __uid_t __suid)
__THROW __wur;
/* Set the real group ID, effective group ID, and saved-set group ID,
of the calling process to RGID, EGID, and SGID, respectively. */
extern int setresgid (__gid_t __rgid, __gid_t __egid, __gid_t __sgid)
__THROW __wur;
#endif
/* Clone the calling process, creating an exact copy.
Return -1 for errors, 0 to the new process,
and the process ID of the new process to the old process. */
extern __pid_t fork (void) __THROWNL;
#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \
|| defined __USE_BSD
/* Clone the calling process, but without copying the whole address space.
The calling process is suspended until the new process exits or is
replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
and the process ID of the new process to the old process. */
extern __pid_t vfork (void) __THROW;
#endif /* Use BSD or XPG < 7. */
/* Return the pathname of the terminal FD is open on, or NULL on errors.
The returned storage is good only until the next call to this function. */
extern char *ttyname (int __fd) __THROW;
/* Store at most BUFLEN characters of the pathname of the terminal FD is
open on in BUF. Return 0 on success, otherwise an error number. */
extern int ttyname_r (int __fd, char *__buf, size_t __buflen)
__THROW __nonnull ((2)) __wur;
/* Return 1 if FD is a valid descriptor associated
with a terminal, zero if not. */
extern int isatty (int __fd) __THROW;
#if defined __USE_BSD \
|| (defined __USE_XOPEN_EXTENDED && !defined __USE_UNIX98)
/* Return the index into the active-logins file (utmp) for
the controlling terminal. */
extern int ttyslot (void) __THROW;
#endif
/* Make a link to FROM named TO. */
extern int link (const char *__from, const char *__to)
__THROW __nonnull ((1, 2)) __wur;
#ifdef __USE_ATFILE
/* Like link but relative paths in TO and FROM are interpreted relative
to FROMFD and TOFD respectively. */
extern int linkat (int __fromfd, const char *__from, int __tofd,
const char *__to, int __flags)
__THROW __nonnull ((2, 4)) __wur;
#endif
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
/* Make a symbolic link to FROM named TO. */
extern int symlink (const char *__from, const char *__to)
__THROW __nonnull ((1, 2)) __wur;
/* Read the contents of the symbolic link PATH into no more than
LEN bytes of BUF. The contents are not null-terminated.
Returns the number of characters read, or -1 for errors. */
extern ssize_t readlink (const char *__restrict __path,
char *__restrict __buf, size_t __len)
__THROW __nonnull ((1, 2)) __wur;
#endif /* Use BSD. */
#ifdef __USE_ATFILE
/* Like symlink but a relative path in TO is interpreted relative to TOFD. */
extern int symlinkat (const char *__from, int __tofd,
const char *__to) __THROW __nonnull ((1, 3)) __wur;
/* Like readlink but a relative PATH is interpreted relative to FD. */
extern ssize_t readlinkat (int __fd, const char *__restrict __path,
char *__restrict __buf, size_t __len)
__THROW __nonnull ((2, 3)) __wur;
#endif
/* Remove the link NAME. */
extern int unlink (const char *__name) __THROW __nonnull ((1));
#ifdef __USE_ATFILE
/* Remove the link NAME relative to FD. */
extern int unlinkat (int __fd, const char *__name, int __flag)
__THROW __nonnull ((2));
#endif
/* Remove the directory PATH. */
extern int rmdir (const char *__path) __THROW __nonnull ((1));
/* Return the foreground process group ID of FD. */
extern __pid_t tcgetpgrp (int __fd) __THROW;
/* Set the foreground process group ID of FD set PGRP_ID. */
extern int tcsetpgrp (int __fd, __pid_t __pgrp_id) __THROW;
/* Return the login name of the user.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern char *getlogin (void);
#if defined __USE_REENTRANT || defined __USE_POSIX199506
/* Return at most NAME_LEN characters of the login name of the user in NAME.
If it cannot be determined or some other error occurred, return the error
code. Otherwise return 0.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int getlogin_r (char *__name, size_t __name_len) __nonnull ((1));
#endif
#ifdef __USE_BSD
/* Set the login name returned by `getlogin'. */
extern int setlogin (const char *__name) __THROW __nonnull ((1));
#endif
#ifdef __USE_POSIX2
/* Get definitions and prototypes for functions to process the
arguments in ARGV (ARGC of them, minus the program name) for
options given in OPTS. */
# define __need_getopt
# include
#endif
#if defined __USE_BSD || defined __USE_UNIX98 || defined __USE_XOPEN2K
/* Put the name of the current host in no more than LEN bytes of NAME.
The result is null-terminated if LEN is large enough for the full
name and the terminator. */
extern int gethostname (char *__name, size_t __len) __THROW __nonnull ((1));
#endif
#if defined __USE_BSD || (defined __USE_XOPEN && !defined __USE_UNIX98)
/* Set the name of the current host to NAME, which is LEN bytes long.
This call is restricted to the super-user. */
extern int sethostname (const char *__name, size_t __len)
__THROW __nonnull ((1)) __wur;
/* Set the current machine's Internet number to ID.
This call is restricted to the super-user. */
extern int sethostid (long int __id) __THROW __wur;
/* Get and set the NIS (aka YP) domain name, if any.
Called just like `gethostname' and `sethostname'.
The NIS domain name is usually the empty string when not using NIS. */
extern int getdomainname (char *__name, size_t __len)
__THROW __nonnull ((1)) __wur;
extern int setdomainname (const char *__name, size_t __len)
__THROW __nonnull ((1)) __wur;
/* Revoke access permissions to all processes currently communicating
with the control terminal, and then send a SIGHUP signal to the process
group of the control terminal. */
extern int vhangup (void) __THROW;
/* Revoke the access of all descriptors currently open on FILE. */
extern int revoke (const char *__file) __THROW __nonnull ((1)) __wur;
/* Enable statistical profiling, writing samples of the PC into at most
SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling
is enabled, the system examines the user PC and increments
SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536]. If SCALE is zero,
disable profiling. Returns zero on success, -1 on error. */
extern int profil (unsigned short int *__sample_buffer, size_t __size,
size_t __offset, unsigned int __scale)
__THROW __nonnull ((1));
/* Turn accounting on if NAME is an existing file. The system will then write
a record for each process as it terminates, to this file. If NAME is NULL,
turn accounting off. This call is restricted to the super-user. */
extern int acct (const char *__name) __THROW;
/* Successive calls return the shells listed in `/etc/shells'. */
extern char *getusershell (void) __THROW;
extern void endusershell (void) __THROW; /* Discard cached info. */
extern void setusershell (void) __THROW; /* Rewind and re-read the file. */
/* Put the program in the background, and dissociate from the controlling
terminal. If NOCHDIR is zero, do `chdir ("/")'. If NOCLOSE is zero,
redirects stdin, stdout, and stderr to /dev/null. */
extern int daemon (int __nochdir, int __noclose) __THROW __wur;
#endif /* Use BSD || X/Open. */
#if defined __USE_BSD || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
/* Make PATH be the root directory (the starting point for absolute paths).
This call is restricted to the super-user. */
extern int chroot (const char *__path) __THROW __nonnull ((1)) __wur;
/* Prompt with PROMPT and read a string from the terminal without echoing.
Uses /dev/tty if possible; otherwise stderr and stdin. */
extern char *getpass (const char *__prompt) __nonnull ((1));
#endif /* Use BSD || X/Open. */
/* Make all changes done to FD actually appear on disk.
This function is a cancellation point and therefore not marked with
__THROW. */
extern int fsync (int __fd);
#ifdef __USE_GNU
/* Make all changes done to all files on the file system associated
with FD actually appear on disk. */
extern int syncfs (int __fd) __THROW;
#endif
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* Return identifier for the current host. */
extern long int gethostid (void);
/* Make all changes done to all files actually appear on disk. */
extern void sync (void) __THROW;
# if defined __USE_BSD || !defined __USE_XOPEN2K
/* Return the number of bytes in a page. This is the system's page size,
which is not necessarily the same as the hardware page size. */
extern int getpagesize (void) __THROW __attribute__ ((__const__));
/* Return the maximum number of file descriptors
the current process could possibly have. */
extern int getdtablesize (void) __THROW;
# endif
#endif /* Use BSD || X/Open Unix. */
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
/* Truncate FILE to LENGTH bytes. */
# ifndef __USE_FILE_OFFSET64
extern int truncate (const char *__file, __off_t __length)
__THROW __nonnull ((1)) __wur;
# else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (truncate,
(const char *__file, __off64_t __length),
truncate64) __nonnull ((1)) __wur;
# else
# define truncate truncate64
# endif
# endif
# ifdef __USE_LARGEFILE64
extern int truncate64 (const char *__file, __off64_t __length)
__THROW __nonnull ((1)) __wur;
# endif
#endif /* Use BSD || X/Open Unix || POSIX 2008. */
#if defined __USE_BSD || defined __USE_POSIX199309 \
|| defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
/* Truncate the file FD is open on to LENGTH bytes. */
# ifndef __USE_FILE_OFFSET64
extern int ftruncate (int __fd, __off_t __length) __THROW __wur;
# else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (ftruncate, (int __fd, __off64_t __length),
ftruncate64) __wur;
# else
# define ftruncate ftruncate64
# endif
# endif
# ifdef __USE_LARGEFILE64
extern int ftruncate64 (int __fd, __off64_t __length) __THROW __wur;
# endif
#endif /* Use BSD || POSIX.1b || X/Open Unix || XPG6. */
#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
|| defined __USE_MISC
/* Set the end of accessible data space (aka "the break") to ADDR.
Returns zero on success and -1 for errors (with errno set). */
extern int brk (void *__addr) __THROW __wur;
/* Increase or decrease the end of accessible data space by DELTA bytes.
If successful, returns the address the previous end of data space
(i.e. the beginning of the new space, if DELTA > 0);
returns (void *) -1 for errors (with errno set). */
extern void *sbrk (intptr_t __delta) __THROW;
#endif
#ifdef __USE_MISC
/* Invoke `system call' number SYSNO, passing it the remaining arguments.
This is completely system-dependent, and not often useful.
In Unix, `syscall' sets `errno' for all errors and most calls return -1
for errors; in many systems you cannot pass arguments or get return
values for all system calls (`pipe', `fork', and `getppid' typically
among them).
In Mach, all system calls take normal arguments and always return an
error code (zero for success). */
extern long int syscall (long int __sysno, ...) __THROW;
#endif /* Use misc. */
#if (defined __USE_MISC || defined __USE_XOPEN_EXTENDED) && !defined F_LOCK
/* NOTE: These declarations also appear in ; be sure to keep both
files consistent. Some systems have them there and some here, and some
software depends on the macros being defined without including both. */
/* `lockf' is a simpler interface to the locking facilities of `fcntl'.
LEN is always relative to the current file position.
The CMD argument is one of the following.
This function is a cancellation point and therefore not marked with
__THROW. */
# define F_ULOCK 0 /* Unlock a previously locked region. */
# define F_LOCK 1 /* Lock a region for exclusive use. */
# define F_TLOCK 2 /* Test and lock a region for exclusive use. */
# define F_TEST 3 /* Test a region for other processes locks. */
# ifndef __USE_FILE_OFFSET64
extern int lockf (int __fd, int __cmd, __off_t __len) __wur;
# else
# ifdef __REDIRECT
extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len),
lockf64) __wur;
# else
# define lockf lockf64
# endif
# endif
# ifdef __USE_LARGEFILE64
extern int lockf64 (int __fd, int __cmd, __off64_t __len) __wur;
# endif
#endif /* Use misc and F_LOCK not already defined. */
#ifdef __USE_GNU
/* Evaluate EXPRESSION, and repeat as long as it returns -1 with `errno'
set to EINTR. */
# define TEMP_FAILURE_RETRY(expression) \
(__extension__ \
({ long int __result; \
do __result = (long int) (expression); \
while (__result == -1L && errno == EINTR); \
__result; }))
#endif
#if defined __USE_POSIX199309 || defined __USE_UNIX98
/* Synchronize at least the data part of a file with the underlying
media. */
extern int fdatasync (int __fildes);
#endif /* Use POSIX199309 */
/* XPG4.2 specifies that prototypes for the encryption functions must
be defined here. */
#ifdef __USE_XOPEN
/* Encrypt at most 8 characters from KEY using salt to perturb DES. */
extern char *crypt (const char *__key, const char *__salt)
__THROW __nonnull ((1, 2));
/* Encrypt data in BLOCK in place if EDFLAG is zero; otherwise decrypt
block in place. */
extern void encrypt (char *__block, int __edflag) __THROW __nonnull ((1));
/* Swab pairs bytes in the first N bytes of the area pointed to by
FROM and copy the result to TO. The value of TO must not be in the
range [FROM - N + 1, FROM - 1]. If N is odd the first byte in FROM
is without partner. */
extern void swab (const void *__restrict __from, void *__restrict __to,
ssize_t __n) __THROW __nonnull ((1, 2));
#endif
/* The Single Unix specification demands this prototype to be here.
It is also found in . */
#if defined __USE_XOPEN && !defined __USE_XOPEN2K
/* Return the name of the controlling terminal. */
extern char *ctermid (char *__s) __THROW;
#endif
/* Define some macros helping to catch buffer overflows. */
#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
# include
#endif
__END_DECLS
#endif /* unistd.h */