1 /* POSIX-specific extra functions. 2 Copyright (C) 2016-2022 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 32 struct stat64; 33 34 pid_t xfork (void); 35 pid_t xwaitpid (pid_t, int *status, int flags); 36 void xpipe (int[2]); 37 void xdup2 (int, int); 38 int xopen (const char *path, int flags, mode_t); 39 #ifndef __USE_TIME_BITS64 40 # ifdef __USE_FILE_OFFSET64 41 void xstat (const char *path, struct stat *); 42 void xlstat (const char *path, struct stat *); 43 void xfstat (int fd, struct stat *); 44 # else 45 void xstat (const char *path, struct stat64 *); 46 void xlstat (const char *path, struct stat64 *); 47 void xfstat (int fd, struct stat64 *); 48 # endif 49 #else 50 void __REDIRECT (xstat, (const char *path, struct stat *), xstat_time64); 51 void __REDIRECT (xlstat, (const char *path, struct stat *), xlstat_time64); 52 void __REDIRECT (xfstat, (int fd, struct stat *), xfstat_time64); 53 #endif 54 void xmkdir (const char *path, mode_t); 55 void xchroot (const char *path); 56 void xunlink (const char *path); 57 long xsysconf (int name); 58 long long xlseek (int fd, long long offset, int whence); 59 void xftruncate (int fd, long long length); 60 void xsymlink (const char *target, const char *linkpath); 61 void xchdir (const char *path); 62 void xfchmod (int fd, mode_t mode); 63 void xchmod (const char *pathname, mode_t mode); 64 void xmkfifo (const char *pathname, mode_t mode); 65 66 /* Equivalent of "mkdir -p". */ 67 void xmkdirp (const char *, mode_t); 68 69 /* Read the link at PATH. The caller should free the returned string 70 with free. */ 71 char *xreadlink (const char *path); 72 73 /* Close the file descriptor. Ignore EINTR errors, but terminate the 74 process on other errors. */ 75 void xclose (int); 76 77 /* Write the buffer. Retry on short writes. */ 78 void xwrite (int, const void *, size_t); 79 80 /* Invoke mmap with a zero file offset. */ 81 void *xmmap (void *addr, size_t length, int prot, int flags, int fd); 82 void xmprotect (void *addr, size_t length, int prot); 83 void xmunmap (void *addr, size_t length); 84 85 ssize_t xcopy_file_range(int fd_in, loff_t *off_in, int fd_out, 86 loff_t *off_out, size_t len, unsigned int flags); 87 88 __END_DECLS 89 90 #endif /* SUPPORT_XUNISTD_H */ 91