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 <unistd.h>
28
29__BEGIN_DECLS
30
31struct stat64;
32
33pid_t xfork (void);
34pid_t xwaitpid (pid_t, int *status, int flags);
35void xpipe (int[2]);
36void xdup2 (int, int);
37int xopen (const char *path, int flags, mode_t);
38void xstat (const char *path, struct stat64 *);
39void xlstat (const char *path, struct stat64 *);
40void xfstat (int fd, struct stat64 *);
41void xmkdir (const char *path, mode_t);
42void xchroot (const char *path);
43void xunlink (const char *path);
44long xsysconf (int name);
45long long xlseek (int fd, long long offset, int whence);
46void xftruncate (int fd, long long length);
47void xsymlink (const char *target, const char *linkpath);
48void xchdir (const char *path);
49void xfchmod (int fd, mode_t mode);
50void xchmod (const char *pathname, mode_t mode);
51
52/* Equivalent of "mkdir -p". */
53void xmkdirp (const char *, mode_t);
54
55/* Read the link at PATH. The caller should free the returned string
56 with free. */
57char *xreadlink (const char *path);
58
59/* Close the file descriptor. Ignore EINTR errors, but terminate the
60 process on other errors. */
61void xclose (int);
62
63/* Write the buffer. Retry on short writes. */
64void xwrite (int, const void *, size_t);
65
66/* Invoke mmap with a zero file offset. */
67void *xmmap (void *addr, size_t length, int prot, int flags, int fd);
68void xmprotect (void *addr, size_t length, int prot);
69void xmunmap (void *addr, size_t length);
70
71ssize_t xcopy_file_range(int fd_in, loff_t *off_in, int fd_out,
72 loff_t *off_out, size_t len, unsigned int flags);
73
74__END_DECLS
75
76#endif /* SUPPORT_XUNISTD_H */
77