1 /*- 2 * Copyright (c) 2015 Jilles Tjoelker 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/stat.h> 31 32 #include <errno.h> 33 #include <fcntl.h> 34 #include <time.h> 35 36 #ifndef UTIME_NOW 37 #define UTIME_NOW -1 38 #define UTIME_OMIT -2 39 #endif 40 41 int 42 utimensat(int fd, const char *path, const struct timespec times[2], int flag) 43 { 44 struct timeval now, tv[2], *tvp; 45 struct stat sb; 46 int osreldate; 47 48 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) { 49 errno = EINVAL; 50 return (-1); 51 } 52 if (times == NULL || (times[0].tv_nsec == UTIME_NOW && 53 times[1].tv_nsec == UTIME_NOW)) 54 tvp = NULL; 55 else if (times[0].tv_nsec == UTIME_OMIT && 56 times[1].tv_nsec == UTIME_OMIT) 57 return (0); 58 else { 59 if ((times[0].tv_nsec < 0 || times[0].tv_nsec > 999999999) && 60 times[0].tv_nsec != UTIME_NOW && 61 times[0].tv_nsec != UTIME_OMIT) { 62 errno = EINVAL; 63 return (-1); 64 } 65 if ((times[1].tv_nsec < 0 || times[1].tv_nsec > 999999999) && 66 times[1].tv_nsec != UTIME_NOW && 67 times[1].tv_nsec != UTIME_OMIT) { 68 errno = EINVAL; 69 return (-1); 70 } 71 tv[0].tv_sec = times[0].tv_sec; 72 tv[0].tv_usec = times[0].tv_nsec / 1000; 73 tv[1].tv_sec = times[1].tv_sec; 74 tv[1].tv_usec = times[1].tv_nsec / 1000; 75 tvp = tv; 76 if (times[0].tv_nsec == UTIME_OMIT || 77 times[1].tv_nsec == UTIME_OMIT) { 78 if (fstatat(fd, path, &sb, flag) == -1) 79 return (-1); 80 if (times[0].tv_nsec == UTIME_OMIT) { 81 tv[0].tv_sec = sb.st_atim.tv_sec; 82 tv[0].tv_usec = sb.st_atim.tv_nsec / 1000; 83 } 84 if (times[1].tv_nsec == UTIME_OMIT) { 85 tv[1].tv_sec = sb.st_mtim.tv_sec; 86 tv[1].tv_usec = sb.st_mtim.tv_nsec / 1000; 87 } 88 } 89 if (times[0].tv_nsec == UTIME_NOW || 90 times[1].tv_nsec == UTIME_NOW) { 91 if (gettimeofday(&now, NULL) == -1) 92 return (-1); 93 if (times[0].tv_nsec == UTIME_NOW) 94 tv[0] = now; 95 if (times[1].tv_nsec == UTIME_NOW) 96 tv[1] = now; 97 } 98 } 99 if ((flag & AT_SYMLINK_NOFOLLOW) == 0) 100 return (futimesat(fd, path, tvp)); 101 else if ((flag & AT_SYMLINK_NOFOLLOW) != 0 && 102 (fd == AT_FDCWD || path[0] == '/')) 103 return (lutimes(path, tvp)); 104 else { 105 errno = ENOTSUP; 106 return (-1); 107 } 108 } 109