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/****************************************************************************
* bfs *
* Copyright (C) 2022 Tavian Barnes <tavianator@tavianator.com> *
* *
* Permission to use, copy, modify, and/or distribute this software for any *
* purpose with or without fee is hereby granted. *
* *
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR *
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES *
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN *
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF *
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. *
****************************************************************************/
#include "../src/xtime.h"
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
/** Check if a path has a trailing slash. */
static bool trailing_slash(const char *path) {
size_t len = strlen(path);
return len > 0 && path[len - 1] == '/';
}
/** Create any parent directories of the given path. */
static int mkdirs(const char *path, mode_t mode) {
char *copy = strdup(path);
if (!copy) {
return -1;
}
int ret = -1;
char *cur = copy + strspn(copy, "/");
while (true) {
cur += strcspn(cur, "/");
char *next = cur + strspn(cur, "/");
if (!*next) {
ret = 0;
break;
}
*cur = '\0';
if (mkdir(copy, mode) != 0 && errno != EEXIST) {
break;
}
*cur = '/';
cur = next;
}
free(copy);
return ret;
}
/** Touch one path. */
static int xtouch(const char *path, const struct timespec times[2], int flags, mode_t mode, bool parents, mode_t pmode) {
int ret = utimensat(AT_FDCWD, path, times, flags);
if (ret == 0 || errno != ENOENT) {
return ret;
}
if (parents && mkdirs(path, pmode) != 0) {
return -1;
}
if (trailing_slash(path)) {
if (mkdir(path, mode) != 0) {
return -1;
}
return utimensat(AT_FDCWD, path, times, flags);
} else {
int fd = open(path, O_WRONLY | O_CREAT, mode);
if (fd < 0) {
return -1;
}
if (futimens(fd, times) != 0) {
int error = errno;
close(fd);
errno = error;
return -1;
}
return close(fd);
}
}
int main(int argc, char *argv[]) {
int flags = 0;
bool atime = false, mtime = false;
bool parents = false;
const char *mstr = NULL;
const char *tstr = NULL;
const char *cmd = argc > 0 ? argv[0] : "xtouch";
int c;
while (c = getopt(argc, argv, ":M:ahmpt:"), c != -1) {
switch (c) {
case 'M':
mstr = optarg;
break;
case 'a':
atime = true;
break;
case 'h':
flags = AT_SYMLINK_NOFOLLOW;
break;
case 'm':
mtime = true;
break;
case 'p':
parents = true;
break;
case 't':
tstr = optarg;
break;
case ':':
fprintf(stderr, "%s: Missing argument to -%c\n", cmd, optopt);
return EXIT_FAILURE;
case '?':
fprintf(stderr, "%s: Unrecognized option -%c\n", cmd, optopt);
return EXIT_FAILURE;
}
}
mode_t mask = umask(0);
mode_t fmode = 0666 & ~mask;
mode_t dmode = 0777 & ~mask;
mode_t pmode = 0777 & ~mask;
if (mstr) {
char *end;
long mode = strtol(mstr, &end, 8);
if (*mstr && !*end && mode >= 0 && mode < 01000) {
fmode = dmode = mode;
} else {
fprintf(stderr, "%s: Invalid mode '%s'\n", cmd, mstr);
return EXIT_FAILURE;
}
}
struct timespec ts;
if (tstr) {
if (xgetdate(tstr, &ts) != 0) {
fprintf(stderr, "%s: Parsing time '%s' failed: %s\n", cmd, tstr, strerror(errno));
return EXIT_FAILURE;
}
} else {
// Don't use UTIME_NOW, so that multiple paths all get the same timestamp
if (xgettime(&ts) != 0) {
perror("xgettime()");
return EXIT_FAILURE;
}
}
struct timespec times[2] = {
{ .tv_nsec = UTIME_OMIT },
{ .tv_nsec = UTIME_OMIT },
};
if (!atime && !mtime) {
atime = true;
mtime = true;
}
if (atime) {
times[0] = ts;
}
if (mtime) {
times[1] = ts;
}
if (optind >= argc) {
fprintf(stderr, "%s: No files to touch\n", cmd);
return EXIT_FAILURE;
}
int ret = EXIT_SUCCESS;
for (; optind < argc; ++optind) {
const char *path = argv[optind];
bool isdir = trailing_slash(path);
if (xtouch(path, times, flags, isdir ? dmode : fmode, parents, pmode) != 0) {
fprintf(stderr, "%s: Touching '%s' failed: %s\n", cmd, path, strerror(errno));
ret = EXIT_FAILURE;
}
}
return ret;
}
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