-/* Copyright (C) 1991-2014 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
+ <https://www.gnu.org/licenses/>. */
/*
* POSIX Standard: 2.10 Symbolic Constants <unistd.h>
/* The utilities on GNU systems also correspond to this version. */
#define _POSIX2_VERSION __POSIX2_THIS_VERSION
+/* This symbol was required until the 2001 edition of POSIX. */
+#define _POSIX2_C_VERSION __POSIX2_THIS_VERSION
+
/* If defined, the implementation supports the
C Language Bindings Option. */
#define _POSIX2_C_BIND __POSIX2_THIS_VERSION
/* The X/Open Unix extensions are available. */
#define _XOPEN_UNIX 1
-/* Encryption is present. */
-#define _XOPEN_CRYPT 1
-
/* The enhanced internationalization capabilities according to XPG4.2
are present. */
#define _XOPEN_ENH_I18N 1
/* An alias for `euidaccess', used by some other systems. */
extern int eaccess (const char *__name, int __type)
__THROW __nonnull ((1));
+
+/* Execute program relative to a directory file descriptor. */
+extern int execveat (int __fd, const char *__path, char *const __argv[],
+ char *const __envp[], int __flags)
+ __THROW __nonnull ((2, 3));
#endif
#ifdef __USE_ATFILE
__THROW. */
extern int close (int __fd);
+#ifdef __USE_MISC
+/* Close all open file descriptors greater than or equal to LOWFD.
+ Negative LOWFD is clamped to 0. */
+extern void closefrom (int __lowfd) __THROW;
+#endif
+
/* Read NBYTES into BUF from FD. Return the
number read, -1 for errors or 0 for EOF.
This function is a cancellation point and therefore not marked with
__THROW. */
-extern ssize_t read (int __fd, void *__buf, size_t __nbytes) __wur;
+extern ssize_t read (int __fd, void *__buf, size_t __nbytes) __wur
+ __fortified_attr_access (__write_only__, 2, 3);
/* Write N bytes of BUF to FD. Return the number written, or -1.
This function is a cancellation point and therefore not marked with
__THROW. */
-extern ssize_t write (int __fd, const void *__buf, size_t __n) __wur;
+extern ssize_t write (int __fd, const void *__buf, size_t __n) __wur
+ __attr_access ((__read_only__, 2, 3));
#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
# ifndef __USE_FILE_OFFSET64
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t pread (int __fd, void *__buf, size_t __nbytes,
- __off_t __offset) __wur;
+ __off_t __offset) __wur
+ __fortified_attr_access (__write_only__, 2, 3);
/* Write N bytes of BUF to FD at the given position OFFSET without
changing the file pointer. Return the number written, or -1.
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t pwrite (int __fd, const void *__buf, size_t __n,
- __off_t __offset) __wur;
+ __off_t __offset) __wur
+ __attr_access ((__read_only__, 2, 3));
+
# else
# ifdef __REDIRECT
extern ssize_t __REDIRECT (pread, (int __fd, void *__buf, size_t __nbytes,
__off64_t __offset),
- pread64) __wur;
+ pread64) __wur
+ __fortified_attr_access (__write_only__, 2, 3);
extern ssize_t __REDIRECT (pwrite, (int __fd, const void *__buf,
size_t __nbytes, __off64_t __offset),
- pwrite64) __wur;
+ pwrite64) __wur
+ __attr_access ((__read_only__, 2, 3));
# else
# define pread pread64
# define pwrite pwrite64
changing the file pointer. Return the number read, -1 for errors
or 0 for EOF. */
extern ssize_t pread64 (int __fd, void *__buf, size_t __nbytes,
- __off64_t __offset) __wur;
+ __off64_t __offset) __wur
+ __fortified_attr_access (__write_only__, 2, 3);
/* Write N bytes of BUF to FD at the given position OFFSET without
changing the file pointer. Return the number written, or -1. */
extern ssize_t pwrite64 (int __fd, const void *__buf, size_t __n,
- __off64_t __offset) __wur;
+ __off64_t __offset) __wur
+ __attr_access ((__read_only__, 2, 3));
# endif
#endif
If successful, return BUF. If not, put an error message in
BUF and return NULL. BUF should be at least PATH_MAX bytes long. */
extern char *getwd (char *__buf)
- __THROW __nonnull ((1)) __attribute_deprecated__ __wur;
+ __THROW __nonnull ((1)) __attribute_deprecated__ __wur
+ __attr_access ((__write_only__, 1));
#endif
#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;
+extern size_t confstr (int __name, char *__buf, size_t __len) __THROW
+ __fortified_attr_access (__write_only__, 2, 3);
#endif
/* 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;
-
+extern int getgroups (int __size, __gid_t __list[]) __THROW __wur
+ __fortified_attr_access (__write_only__, 2, 1);
#ifdef __USE_GNU
/* Return nonzero iff the calling process is in group GID. */
extern int group_member (__gid_t __gid) __THROW;
extern __pid_t vfork (void) __THROW;
#endif /* Use misc or XPG < 7. */
+#ifdef __USE_GNU
+/* This is similar to fork, however it does not run the atfork handlers
+ neither reinitialize any internal locks in multithread case.
+ Different than fork, _Fork is async-signal-safe. */
+extern __pid_t _Fork (void) __THROW;
+#endif
+
/* 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. */
/* 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;
+ __THROW __nonnull ((2)) __wur
+ __fortified_attr_access (__write_only__, 2, 3);
/* Return 1 if FD is a valid descriptor associated
with a terminal, zero if not. */
extern int isatty (int __fd) __THROW;
-#if defined __USE_MISC \
- || (defined __USE_XOPEN_EXTENDED && !defined __USE_UNIX98)
+#ifdef __USE_MISC
/* Return the index into the active-logins file (utmp) for
the controlling terminal. */
extern int ttyslot (void) __THROW;
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;
+ __THROW __nonnull ((1, 2)) __wur
+ __fortified_attr_access (__write_only__, 2, 3);
+
#endif /* Use POSIX.1-2001. */
#ifdef __USE_ATFILE
/* 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;
+ __THROW __nonnull ((2, 3)) __wur
+ __fortified_attr_access (__write_only__, 3, 4);
#endif
/* Remove the link NAME. */
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern char *getlogin (void);
-#if defined __USE_REENTRANT || defined __USE_POSIX199506
+#ifdef __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));
+extern int getlogin_r (char *__name, size_t __name_len) __nonnull ((1))
+ __fortified_attr_access (__write_only__, 1, 2);
#endif
#ifdef __USE_MISC
/* 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 <getopt.h>
+# include <bits/getopt_posix.h>
#endif
-#if defined __USE_UNIX98 || defined __USE_XOPEN2K
+#if defined __USE_XOPEN_EXTENDED || 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));
+extern int gethostname (char *__name, size_t __len) __THROW __nonnull ((1))
+ __fortified_attr_access (__write_only__, 1, 2);
#endif
-#if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_UNIX98)
+#if defined __USE_MISC
/* 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;
+ __THROW __nonnull ((1)) __wur __attr_access ((__read_only__, 1, 2));
/* Set the current machine's Internet number to ID.
This call is restricted to the super-user. */
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;
+ __THROW __nonnull ((1)) __wur
+ __fortified_attr_access (__write_only__, 1, 2);
extern int setdomainname (const char *__name, size_t __len)
- __THROW __nonnull ((1)) __wur;
-
+ __THROW __nonnull ((1)) __wur __attr_access ((__read_only__, 1, 2));
/* Revoke access permissions to all processes currently communicating
with the control terminal, and then send a SIGHUP signal to the process
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 misc || X/Open. */
+#endif /* Use misc. */
#if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
do __result = (long int) (expression); \
while (__result == -1L && errno == EINTR); \
__result; }))
-#endif
+
+/* Copy LENGTH bytes from INFD to OUTFD. */
+ssize_t copy_file_range (int __infd, __off64_t *__pinoff,
+ int __outfd, __off64_t *__poutoff,
+ size_t __length, unsigned int __flags);
+#endif /* __USE_GNU */
#if defined __USE_POSIX199309 || defined __USE_UNIX98
/* Synchronize at least the data part of a file with the underlying
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. */
+#ifdef __USE_MISC
+/* One-way hash PHRASE, returning a string suitable for storage in the
+ user database. SALT selects the one-way function to use, and
+ ensures that no two users' hashes are the same, even if they use
+ the same passphrase. The return value points to static storage
+ which will be overwritten by the next call to crypt. */
extern char *crypt (const char *__key, const char *__salt)
__THROW __nonnull ((1, 2));
+#endif
-/* Encrypt data in BLOCK in place if EDFLAG is zero; otherwise decrypt
- block in place. */
-extern void encrypt (char *__glibc_block, int __edflag)
- __THROW __nonnull ((1));
-
-
+#ifdef __USE_XOPEN
/* 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));
+ ssize_t __n) __THROW __nonnull ((1, 2))
+ __attr_access ((__read_only__, 1, 3))
+ __attr_access ((__write_only__, 2, 3));
#endif
-/* The Single Unix specification demands this prototype to be here.
- It is also found in <stdio.h>. */
+/* Prior to Issue 6, the Single Unix Specification required these
+ prototypes to appear in this header. They are also found in
+ <stdio.h>. */
#if defined __USE_XOPEN && !defined __USE_XOPEN2K
/* Return the name of the controlling terminal. */
extern char *ctermid (char *__s) __THROW;
+
+/* Return the name of the current user. */
+extern char *cuserid (char *__s);
#endif
+/* Unix98 requires this function to be declared here. In other
+ standards it is in <pthread.h>. */
+#if defined __USE_UNIX98 && !defined __USE_XOPEN2K
+extern int pthread_atfork (void (*__prepare) (void),
+ void (*__parent) (void),
+ void (*__child) (void)) __THROW;
+#endif
+
+#ifdef __USE_MISC
+/* Write LENGTH bytes of randomness starting at BUFFER. Return 0 on
+ success or -1 on error. */
+int getentropy (void *__buffer, size_t __length) __wur
+ __attr_access ((__write_only__, 1, 2));
+#endif
+
/* Define some macros helping to catch buffer overflows. */
#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
# include <bits/unistd.h>
#endif
+/* System-specific extensions. */
+#include <bits/unistd_ext.h>
+
__END_DECLS
#endif /* unistd.h */
projects / platform / upstream / glibc.git / blobdiff