--- /dev/null
+/* Copyright (C) 1991-2018 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ 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/>. */
+
+/*
+ * POSIX Standard: 2.10 Symbolic Constants <unistd.h>
+ */
+
+#ifndef _UNISTD_H
+#define _UNISTD_H 1
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+/* These may be used to determine what facilities are present at compile time.
+ Their values can be obtained at run time from `sysconf'. */
+
+#ifdef __USE_XOPEN2K8
+/* POSIX Standard approved as ISO/IEC 9945-1 as of September 2008. */
+# define _POSIX_VERSION 200809L
+#elif defined __USE_XOPEN2K
+/* POSIX Standard approved as ISO/IEC 9945-1 as of December 2001. */
+# define _POSIX_VERSION 200112L
+#elif defined __USE_POSIX199506
+/* POSIX Standard approved as ISO/IEC 9945-1 as of June 1995. */
+# define _POSIX_VERSION 199506L
+#elif defined __USE_POSIX199309
+/* POSIX Standard approved as ISO/IEC 9945-1 as of September 1993. */
+# define _POSIX_VERSION 199309L
+#else
+/* POSIX Standard approved as ISO/IEC 9945-1 as of September 1990. */
+# define _POSIX_VERSION 199009L
+#endif
+
+/* These are not #ifdef __USE_POSIX2 because they are
+ in the theoretically application-owned namespace. */
+
+#ifdef __USE_XOPEN2K8
+# define __POSIX2_THIS_VERSION 200809L
+/* The utilities on GNU systems also correspond to this version. */
+#elif defined __USE_XOPEN2K
+/* The utilities on GNU systems also correspond to this version. */
+# define __POSIX2_THIS_VERSION 200112L
+#elif defined __USE_POSIX199506
+/* The utilities on GNU systems also correspond to this version. */
+# define __POSIX2_THIS_VERSION 199506L
+#else
+/* The utilities on GNU systems also correspond to this version. */
+# define __POSIX2_THIS_VERSION 199209L
+#endif
+
+/* 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
+
+/* If defined, the implementation supports the
+ C Language Development Utilities Option. */
+#define _POSIX2_C_DEV __POSIX2_THIS_VERSION
+
+/* If defined, the implementation supports the
+ Software Development Utilities Option. */
+#define _POSIX2_SW_DEV __POSIX2_THIS_VERSION
+
+/* If defined, the implementation supports the
+ creation of locales with the localedef utility. */
+#define _POSIX2_LOCALEDEF __POSIX2_THIS_VERSION
+
+/* X/Open version number to which the library conforms. It is selectable. */
+#ifdef __USE_XOPEN2K8
+# define _XOPEN_VERSION 700
+#elif defined __USE_XOPEN2K
+# define _XOPEN_VERSION 600
+#elif defined __USE_UNIX98
+# define _XOPEN_VERSION 500
+#else
+# define _XOPEN_VERSION 4
+#endif
+
+/* Commands and utilities from XPG4 are available. */
+#define _XOPEN_XCU_VERSION 4
+
+/* We are compatible with the old published standards as well. */
+#define _XOPEN_XPG2 1
+#define _XOPEN_XPG3 1
+#define _XOPEN_XPG4 1
+
+/* The X/Open Unix extensions are available. */
+#define _XOPEN_UNIX 1
+
+/* The enhanced internationalization capabilities according to XPG4.2
+ are present. */
+#define _XOPEN_ENH_I18N 1
+
+/* The legacy interfaces are also available. */
+#define _XOPEN_LEGACY 1
+
+
+/* Get values of POSIX options:
+
+ If these symbols are defined, the corresponding features are
+ always available. If not, they may be available sometimes.
+ The current values can be obtained with `sysconf'.
+
+ _POSIX_JOB_CONTROL Job control is supported.
+ _POSIX_SAVED_IDS Processes have a saved set-user-ID
+ and a saved set-group-ID.
+ _POSIX_REALTIME_SIGNALS Real-time, queued signals are supported.
+ _POSIX_PRIORITY_SCHEDULING Priority scheduling is supported.
+ _POSIX_TIMERS POSIX.4 clocks and timers are supported.
+ _POSIX_ASYNCHRONOUS_IO Asynchronous I/O is supported.
+ _POSIX_PRIORITIZED_IO Prioritized asynchronous I/O is supported.
+ _POSIX_SYNCHRONIZED_IO Synchronizing file data is supported.
+ _POSIX_FSYNC The fsync function is present.
+ _POSIX_MAPPED_FILES Mapping of files to memory is supported.
+ _POSIX_MEMLOCK Locking of all memory is supported.
+ _POSIX_MEMLOCK_RANGE Locking of ranges of memory is supported.
+ _POSIX_MEMORY_PROTECTION Setting of memory protections is supported.
+ _POSIX_MESSAGE_PASSING POSIX.4 message queues are supported.
+ _POSIX_SEMAPHORES POSIX.4 counting semaphores are supported.
+ _POSIX_SHARED_MEMORY_OBJECTS POSIX.4 shared memory objects are supported.
+ _POSIX_THREADS POSIX.1c pthreads are supported.
+ _POSIX_THREAD_ATTR_STACKADDR Thread stack address attribute option supported.
+ _POSIX_THREAD_ATTR_STACKSIZE Thread stack size attribute option supported.
+ _POSIX_THREAD_SAFE_FUNCTIONS Thread-safe functions are supported.
+ _POSIX_THREAD_PRIORITY_SCHEDULING
+ POSIX.1c thread execution scheduling supported.
+ _POSIX_THREAD_PRIO_INHERIT Thread priority inheritance option supported.
+ _POSIX_THREAD_PRIO_PROTECT Thread priority protection option supported.
+ _POSIX_THREAD_PROCESS_SHARED Process-shared synchronization supported.
+ _POSIX_PII Protocol-independent interfaces are supported.
+ _POSIX_PII_XTI XTI protocol-indep. interfaces are supported.
+ _POSIX_PII_SOCKET Socket protocol-indep. interfaces are supported.
+ _POSIX_PII_INTERNET Internet family of protocols supported.
+ _POSIX_PII_INTERNET_STREAM Connection-mode Internet protocol supported.
+ _POSIX_PII_INTERNET_DGRAM Connectionless Internet protocol supported.
+ _POSIX_PII_OSI ISO/OSI family of protocols supported.
+ _POSIX_PII_OSI_COTS Connection-mode ISO/OSI service supported.
+ _POSIX_PII_OSI_CLTS Connectionless ISO/OSI service supported.
+ _POSIX_POLL Implementation supports `poll' function.
+ _POSIX_SELECT Implementation supports `select' and `pselect'.
+
+ _XOPEN_REALTIME X/Open realtime support is available.
+ _XOPEN_REALTIME_THREADS X/Open realtime thread support is available.
+ _XOPEN_SHM Shared memory interface according to XPG4.2.
+
+ _XBS5_ILP32_OFF32 Implementation provides environment with 32-bit
+ int, long, pointer, and off_t types.
+ _XBS5_ILP32_OFFBIG Implementation provides environment with 32-bit
+ int, long, and pointer and off_t with at least
+ 64 bits.
+ _XBS5_LP64_OFF64 Implementation provides environment with 32-bit
+ int, and 64-bit long, pointer, and off_t types.
+ _XBS5_LPBIG_OFFBIG Implementation provides environment with at
+ least 32 bits int and long, pointer, and off_t
+ with at least 64 bits.
+
+ If any of these symbols is defined as -1, the corresponding option is not
+ true for any file. If any is defined as other than -1, the corresponding
+ option is true for all files. If a symbol is not defined at all, the value
+ for a specific file can be obtained from `pathconf' and `fpathconf'.
+
+ _POSIX_CHOWN_RESTRICTED Only the super user can use `chown' to change
+ the owner of a file. `chown' can only be used
+ to change the group ID of a file to a group of
+ which the calling process is a member.
+ _POSIX_NO_TRUNC Pathname components longer than
+ NAME_MAX generate an error.
+ _POSIX_VDISABLE If defined, if the value of an element of the
+ `c_cc' member of `struct termios' is
+ _POSIX_VDISABLE, no character will have the
+ effect associated with that element.
+ _POSIX_SYNC_IO Synchronous I/O may be performed.
+ _POSIX_ASYNC_IO Asynchronous I/O may be performed.
+ _POSIX_PRIO_IO Prioritized Asynchronous I/O may be performed.
+
+ Support for the Large File Support interface is not generally available.
+ If it is available the following constants are defined to one.
+ _LFS64_LARGEFILE Low-level I/O supports large files.
+ _LFS64_STDIO Standard I/O supports large files.
+ */
+
+#include <bits/posix_opt.h>
+
+/* Get the environment definitions from Unix98. */
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K
+# include <bits/environments.h>
+#endif
+
+/* Standard file descriptors. */
+#define STDIN_FILENO 0 /* Standard input. */
+#define STDOUT_FILENO 1 /* Standard output. */
+#define STDERR_FILENO 2 /* Standard error output. */
+
+
+/* All functions that are not declared anywhere else. */
+
+#include <bits/types.h>
+
+#ifndef __ssize_t_defined
+typedef __ssize_t ssize_t;
+# define __ssize_t_defined
+#endif
+
+#define __need_size_t
+#define __need_NULL
+#include <stddef.h>
+
+#if defined __USE_XOPEN || defined __USE_XOPEN2K
+/* The Single Unix specification says that some more types are
+ available here. */
+# ifndef __gid_t_defined
+typedef __gid_t gid_t;
+# define __gid_t_defined
+# endif
+
+# ifndef __uid_t_defined
+typedef __uid_t uid_t;
+# define __uid_t_defined
+# endif
+
+# ifndef __off_t_defined
+# ifndef __USE_FILE_OFFSET64
+typedef __off_t off_t;
+# else
+typedef __off64_t off_t;
+# endif
+# define __off_t_defined
+# endif
+# if defined __USE_LARGEFILE64 && !defined __off64_t_defined
+typedef __off64_t off64_t;
+# define __off64_t_defined
+# endif
+
+# ifndef __useconds_t_defined
+typedef __useconds_t useconds_t;
+# define __useconds_t_defined
+# endif
+
+# ifndef __pid_t_defined
+typedef __pid_t pid_t;
+# define __pid_t_defined
+# endif
+#endif /* X/Open */
+
+#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
+# ifndef __intptr_t_defined
+typedef __intptr_t intptr_t;
+# define __intptr_t_defined
+# endif
+#endif
+
+#if defined __USE_MISC || defined __USE_XOPEN
+# ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+# endif
+#endif
+
+/* Values for the second argument to access.
+ These may be OR'd together. */
+#define R_OK 4 /* Test for read permission. */
+#define W_OK 2 /* Test for write permission. */
+#define X_OK 1 /* Test for execute permission. */
+#define F_OK 0 /* Test for existence. */
+
+/* Test for access to NAME using the real UID and real GID. */
+extern int access (const char *__name, int __type) __THROW __nonnull ((1));
+
+#ifdef __USE_GNU
+/* Test for access to NAME using the effective UID and GID
+ (as normal file operations use). */
+extern int euidaccess (const char *__name, int __type)
+ __THROW __nonnull ((1));
+
+/* An alias for `euidaccess', used by some other systems. */
+extern int eaccess (const char *__name, int __type)
+ __THROW __nonnull ((1));
+#endif
+
+#ifdef __USE_ATFILE
+/* Test for access to FILE relative to the directory FD is open on.
+ If AT_EACCESS is set in FLAG, then use effective IDs like `eaccess',
+ otherwise use real IDs like `access'. */
+extern int faccessat (int __fd, const char *__file, int __type, int __flag)
+ __THROW __nonnull ((2)) __wur;
+#endif /* Use GNU. */
+
+
+/* Values for the WHENCE argument to lseek. */
+#ifndef _STDIO_H /* <stdio.h> has the same definitions. */
+# define SEEK_SET 0 /* Seek from beginning of file. */
+# define SEEK_CUR 1 /* Seek from current position. */
+# define SEEK_END 2 /* Seek from end of file. */
+# ifdef __USE_GNU
+# define SEEK_DATA 3 /* Seek to next data. */
+# define SEEK_HOLE 4 /* Seek to next hole. */
+# endif
+#endif
+
+#if defined __USE_MISC && !defined L_SET
+/* Old BSD names for the same constants; just for compatibility. */
+# define L_SET SEEK_SET
+# define L_INCR SEEK_CUR
+# define L_XTND SEEK_END
+#endif
+
+
+/* Move FD's file position to OFFSET bytes from the
+ beginning of the file (if WHENCE is SEEK_SET),
+ the current position (if WHENCE is SEEK_CUR),
+ or the end of the file (if WHENCE is SEEK_END).
+ Return the new file position. */
+#ifndef __USE_FILE_OFFSET64
+extern __off_t lseek (int __fd, __off_t __offset, int __whence) __THROW;
+#else
+# ifdef __REDIRECT_NTH
+extern __off64_t __REDIRECT_NTH (lseek,
+ (int __fd, __off64_t __offset, int __whence),
+ lseek64);
+# else
+# define lseek lseek64
+# endif
+#endif
+#ifdef __USE_LARGEFILE64
+extern __off64_t lseek64 (int __fd, __off64_t __offset, int __whence)
+ __THROW;
+#endif
+
+/* Close the file descriptor FD.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern int close (int __fd);
+
+/* 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;
+
+/* 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;
+
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
+# ifndef __USE_FILE_OFFSET64
+/* Read NBYTES into BUF from FD at the given position OFFSET without
+ changing the file pointer. 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 pread (int __fd, void *__buf, size_t __nbytes,
+ __off_t __offset) __wur;
+
+/* 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;
+# else
+# ifdef __REDIRECT
+extern ssize_t __REDIRECT (pread, (int __fd, void *__buf, size_t __nbytes,
+ __off64_t __offset),
+ pread64) __wur;
+extern ssize_t __REDIRECT (pwrite, (int __fd, const void *__buf,
+ size_t __nbytes, __off64_t __offset),
+ pwrite64) __wur;
+# else
+# define pread pread64
+# define pwrite pwrite64
+# endif
+# endif
+
+# ifdef __USE_LARGEFILE64
+/* Read NBYTES into BUF from FD at the given position OFFSET without
+ 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;
+/* 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;
+# endif
+#endif
+
+/* Create a one-way communication channel (pipe).
+ If successful, two file descriptors are stored in PIPEDES;
+ bytes written on PIPEDES[1] can be read from PIPEDES[0].
+ Returns 0 if successful, -1 if not. */
+extern int pipe (int __pipedes[2]) __THROW __wur;
+
+#ifdef __USE_GNU
+/* Same as pipe but apply flags passed in FLAGS to the new file
+ descriptors. */
+extern int pipe2 (int __pipedes[2], int __flags) __THROW __wur;
+#endif
+
+/* Schedule an alarm. In SECONDS seconds, the process will get a SIGALRM.
+ If SECONDS is zero, any currently scheduled alarm will be cancelled.
+ The function returns the number of seconds remaining until the last
+ alarm scheduled would have signaled, or zero if there wasn't one.
+ There is no return value to indicate an error, but you can set `errno'
+ to 0 and check its value after calling `alarm', and this might tell you.
+ The signal may come late due to processor scheduling. */
+extern unsigned int alarm (unsigned int __seconds) __THROW;
+
+/* Make the process sleep for SECONDS seconds, or until a signal arrives
+ and is not ignored. The function returns the number of seconds less
+ than SECONDS which it actually slept (thus zero if it slept the full time).
+ If a signal handler does a `longjmp' or modifies the handling of the
+ SIGALRM signal while inside `sleep' call, the handling of the SIGALRM
+ signal afterwards is undefined. There is no return value to indicate
+ error, but if `sleep' returns SECONDS, it probably didn't work.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern unsigned int sleep (unsigned int __seconds);
+
+#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \
+ || defined __USE_MISC
+/* Set an alarm to go off (generating a SIGALRM signal) in VALUE
+ microseconds. If INTERVAL is nonzero, when the alarm goes off, the
+ timer is reset to go off every INTERVAL microseconds thereafter.
+ Returns the number of microseconds remaining before the alarm. */
+extern __useconds_t ualarm (__useconds_t __value, __useconds_t __interval)
+ __THROW;
+
+/* Sleep USECONDS microseconds, or until a signal arrives that is not blocked
+ or ignored.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern int usleep (__useconds_t __useconds);
+#endif
+
+
+/* Suspend the process until a signal arrives.
+ This always returns -1 and sets `errno' to EINTR.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern int pause (void);
+
+
+/* Change the owner and group of FILE. */
+extern int chown (const char *__file, __uid_t __owner, __gid_t __group)
+ __THROW __nonnull ((1)) __wur;
+
+#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
+/* Change the owner and group of the file that FD is open on. */
+extern int fchown (int __fd, __uid_t __owner, __gid_t __group) __THROW __wur;
+
+
+/* Change owner and group of FILE, if it is a symbolic
+ link the ownership of the symbolic link is changed. */
+extern int lchown (const char *__file, __uid_t __owner, __gid_t __group)
+ __THROW __nonnull ((1)) __wur;
+
+#endif /* Use X/Open Unix. */
+
+#ifdef __USE_ATFILE
+/* Change the owner and group of FILE relative to the directory FD is open
+ on. */
+extern int fchownat (int __fd, const char *__file, __uid_t __owner,
+ __gid_t __group, int __flag)
+ __THROW __nonnull ((2)) __wur;
+#endif /* Use GNU. */
+
+/* Change the process's working directory to PATH. */
+extern int chdir (const char *__path) __THROW __nonnull ((1)) __wur;
+
+#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
+/* Change the process's working directory to the one FD is open on. */
+extern int fchdir (int __fd) __THROW __wur;
+#endif
+
+/* Get the pathname of the current working directory,
+ and put it in SIZE bytes of BUF. Returns NULL if the
+ directory couldn't be determined or SIZE was too small.
+ If successful, returns BUF. In GNU, if BUF is NULL,
+ an array is allocated with `malloc'; the array is SIZE
+ bytes long, unless SIZE == 0, in which case it is as
+ big as necessary. */
+extern char *getcwd (char *__buf, size_t __size) __THROW __wur;
+
+#ifdef __USE_GNU
+/* Return a malloc'd string containing the current directory name.
+ If the environment variable `PWD' is set, and its value is correct,
+ that value is used. */
+extern char *get_current_dir_name (void) __THROW;
+#endif
+
+#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \
+ || defined __USE_MISC
+/* Put the absolute pathname of the current working directory in BUF.
+ 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;
+#endif
+
+
+/* Duplicate FD, returning a new file descriptor on the same file. */
+extern int dup (int __fd) __THROW __wur;
+
+/* Duplicate FD to FD2, closing FD2 and making it open on the same file. */
+extern int dup2 (int __fd, int __fd2) __THROW;
+
+#ifdef __USE_GNU
+/* Duplicate FD to FD2, closing FD2 and making it open on the same
+ file while setting flags according to FLAGS. */
+extern int dup3 (int __fd, int __fd2, int __flags) __THROW;
+#endif
+
+/* NULL-terminated array of "NAME=VALUE" environment variables. */
+extern char **__environ;
+#ifdef __USE_GNU
+extern char **environ;
+#endif
+
+
+/* Replace the current process, executing PATH with arguments ARGV and
+ environment ENVP. ARGV and ENVP are terminated by NULL pointers. */
+extern int execve (const char *__path, char *const __argv[],
+ char *const __envp[]) __THROW __nonnull ((1, 2));
+
+#ifdef __USE_XOPEN2K8
+/* Execute the file FD refers to, overlaying the running program image.
+ ARGV and ENVP are passed to the new program, as for `execve'. */
+extern int fexecve (int __fd, char *const __argv[], char *const __envp[])
+ __THROW __nonnull ((2));
+#endif
+
+
+/* Execute PATH with arguments ARGV and environment from `environ'. */
+extern int execv (const char *__path, char *const __argv[])
+ __THROW __nonnull ((1, 2));
+
+/* Execute PATH with all arguments after PATH until a NULL pointer,
+ and the argument after that for environment. */
+extern int execle (const char *__path, const char *__arg, ...)
+ __THROW __nonnull ((1, 2));
+
+/* Execute PATH with all arguments after PATH until
+ a NULL pointer and environment from `environ'. */
+extern int execl (const char *__path, const char *__arg, ...)
+ __THROW __nonnull ((1, 2));
+
+/* Execute FILE, searching in the `PATH' environment variable if it contains
+ no slashes, with arguments ARGV and environment from `environ'. */
+extern int execvp (const char *__file, char *const __argv[])
+ __THROW __nonnull ((1, 2));
+
+/* Execute FILE, searching in the `PATH' environment variable if
+ it contains no slashes, with all arguments after FILE until a
+ NULL pointer and environment from `environ'. */
+extern int execlp (const char *__file, const char *__arg, ...)
+ __THROW __nonnull ((1, 2));
+
+#ifdef __USE_GNU
+/* Execute FILE, searching in the `PATH' environment variable if it contains
+ no slashes, with arguments ARGV and environment from `environ'. */
+extern int execvpe (const char *__file, char *const __argv[],
+ char *const __envp[])
+ __THROW __nonnull ((1, 2));
+#endif
+
+
+#if defined __USE_MISC || defined __USE_XOPEN
+/* Add INC to priority of the current process. */
+extern int nice (int __inc) __THROW __wur;
+#endif
+
+
+/* Terminate program execution with the low-order 8 bits of STATUS. */
+extern void _exit (int __status) __attribute__ ((__noreturn__));
+
+
+/* Get the `_PC_*' symbols for the NAME argument to `pathconf' and `fpathconf';
+ the `_SC_*' symbols for the NAME argument to `sysconf';
+ and the `_CS_*' symbols for the NAME argument to `confstr'. */
+#include <bits/confname.h>
+
+/* 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. */
+extern __pid_t getpgrp (void) __THROW;
+
+/* 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_MISC || 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.
+
+ GNU provides the POSIX.1 function. */
+
+/* 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;
+
+#endif /* Use misc or X/Open. */
+
+/* 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_MISC || 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
+
+#ifdef __USE_XOPEN2K
+/* Set the effective user ID of the calling process to UID. */
+extern int seteuid (__uid_t __uid) __THROW __wur;
+#endif /* Use POSIX.1-2001. */
+
+/* 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_MISC || 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
+
+#ifdef __USE_XOPEN2K
+/* Set the effective group ID of the calling process to GID. */
+extern int setegid (__gid_t __gid) __THROW __wur;
+#endif /* Use POSIX.1-2001. */
+
+#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_MISC
+/* 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 misc 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;
+
+#ifdef __USE_MISC
+/* 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_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 POSIX.1-2001. */
+
+#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);
+#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));
+#endif
+
+#ifdef __USE_MISC
+/* 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. */
+# include <bits/getopt_posix.h>
+#endif
+
+
+#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));
+#endif
+
+
+#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;
+
+/* 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 misc. */
+
+
+#if defined __USE_MISC || (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 misc || 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_MISC || 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_MISC || !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 misc || X/Open Unix. */
+
+
+#if 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 X/Open Unix || POSIX 2008. */
+
+#if 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 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 <fcntl.h>; 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; }))
+
+/* 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
+ media. */
+extern int fdatasync (int __fildes);
+#endif /* Use POSIX199309 */
+
+#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
+
+#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));
+#endif
+
+
+/* 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;
+#endif
+
+/* Define some macros helping to catch buffer overflows. */
+#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
+# include <bits/unistd.h>
+#endif
+
+__END_DECLS
+
+#endif /* unistd.h */
projects / cross.git / blobdiff