1/* 2 * Copyright 2002-2009, Axel Dörfler, axeld@pinc-software.de. 3 * Distributed under the terms of the MIT License. 4 */ 5 6 7#include <errno.h> 8#include <unistd.h> 9 10#include <NodeMonitor.h> 11 12#include <errno_private.h> 13#include <syscalls.h> 14#include <syscall_utils.h> 15 16 17static int 18common_chown(int fd, const char* path, bool followLinks, uid_t owner, 19 gid_t group) 20{ 21 struct stat stat; 22 status_t status; 23 24 int mask = 0; 25 if (owner != (uid_t)-1) { 26 stat.st_uid = owner; 27 mask |= B_STAT_UID; 28 } 29 if (group != (gid_t)-1) { 30 stat.st_gid = group; 31 mask |= B_STAT_GID; 32 } 33 34 status = _kern_write_stat(fd, path, followLinks, &stat, 35 sizeof(struct stat), mask); 36 37 RETURN_AND_SET_ERRNO(status); 38} 39 40 41int 42chown(const char *path, uid_t owner, gid_t group) 43{ 44 return common_chown(-1, path, true, owner, group); 45} 46 47 48int 49lchown(const char *path, uid_t owner, gid_t group) 50{ 51 return common_chown(-1, path, false, owner, group); 52} 53 54 55int 56fchown(int fd, uid_t owner, gid_t group) 57{ 58 return common_chown(fd, NULL, false, owner, group); 59} 60 61 62int 63fchownat(int fd, const char* path, uid_t owner, gid_t group, int flag) 64{ 65 return common_chown(fd, path, (flag & AT_SYMLINK_NOFOLLOW) == 0, owner, 66 group); 67} 68