1/* POSIX-specific extra functions.
2 Copyright (C) 2016-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19/* These wrapper functions use POSIX types and therefore cannot be
20 declared in <support/support.h>. */
21
22#ifndef SUPPORT_XUNISTD_H
23#define SUPPORT_XUNISTD_H
24
25#include <sys/cdefs.h>
26#include <sys/types.h>
27#include <sys/stat.h>
28#include <unistd.h>
29
30__BEGIN_DECLS
31
32struct stat64;
33
34pid_t xfork (void);
35pid_t xwaitpid (pid_t, int *status, int flags);
36void xpipe (int[2]);
37void xdup2 (int, int);
38int xopen (const char *path, int flags, mode_t);
39#ifndef __USE_TIME_BITS64
40# ifdef __USE_FILE_OFFSET64
41void xstat (const char *path, struct stat *);
42void xlstat (const char *path, struct stat *);
43void xfstat (int fd, struct stat *);
44# else
45void xstat (const char *path, struct stat64 *);
46void xlstat (const char *path, struct stat64 *);
47void xfstat (int fd, struct stat64 *);
48# endif
49#else
50void __REDIRECT (xstat, (const char *path, struct stat *), xstat_time64);
51void __REDIRECT (xlstat, (const char *path, struct stat *), xlstat_time64);
52void __REDIRECT (xfstat, (int fd, struct stat *), xfstat_time64);
53#endif
54void xmkdir (const char *path, mode_t);
55void xchroot (const char *path);
56void xunlink (const char *path);
57long xsysconf (int name);
58long long xlseek (int fd, long long offset, int whence);
59void xftruncate (int fd, long long length);
60void xsymlink (const char *target, const char *linkpath);
61void xchdir (const char *path);
62void xfchmod (int fd, mode_t mode);
63void xchmod (const char *pathname, mode_t mode);
64
65/* Equivalent of "mkdir -p". */
66void xmkdirp (const char *, mode_t);
67
68/* Read the link at PATH. The caller should free the returned string
69 with free. */
70char *xreadlink (const char *path);
71
72/* Close the file descriptor. Ignore EINTR errors, but terminate the
73 process on other errors. */
74void xclose (int);
75
76/* Write the buffer. Retry on short writes. */
77void xwrite (int, const void *, size_t);
78
79/* Invoke mmap with a zero file offset. */
80void *xmmap (void *addr, size_t length, int prot, int flags, int fd);
81void xmprotect (void *addr, size_t length, int prot);
82void xmunmap (void *addr, size_t length);
83
84ssize_t xcopy_file_range(int fd_in, loff_t *off_in, int fd_out,
85 loff_t *off_out, size_t len, unsigned int flags);
86
87__END_DECLS
88
89#endif /* SUPPORT_XUNISTD_H */
90