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/*
* Copyright (C) 2014 Andrea Mazzoleni
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "portable.h"
#include "support.h"
#include "elem.h"
#include "state.h"
#include "handle.h"
void state_touch(struct snapraid_state* state)
{
tommy_node* i;
char esc_buffer[ESC_MAX];
msg_progress("Setting sub-second timestamps...\n");
/* for all disks */
for (i = state->disklist; i != 0; i = i->next) {
struct snapraid_disk* disk = i->data;
tommy_node* j;
/* for all files */
for (j = disk->filelist; j != 0; j = j->next) {
struct snapraid_file* file = j->data;
/* if the file has a zero nanosecond timestamp */
/* note that symbolic links are not in the file list */
/* and then are not processed */
if (file->mtime_nsec == 0) {
char path[PATH_MAX];
struct stat st;
int f;
int ret;
int nsec;
int flags;
pathprint(path, sizeof(path), "%s%s", disk->dir, file->sub);
/* set a new nanosecond timestamp different than 0 */
do {
uint32_t nano;
/* get a random nanosecond value */
if (randomize(&nano, sizeof(nano)) != 0) {
/* LCOV_EXCL_START */
log_fatal("Failed to retrieve random values.\n");
exit(EXIT_FAILURE);
/* LCOV_EXCL_STOP */
}
nsec = nano % 1000000000;
} while (nsec == 0);
/* O_BINARY: open as binary file (Windows only) */
/* O_NOFOLLOW: do not follow links to ensure to open the real file */
flags = O_BINARY | O_NOFOLLOW;
#ifdef _WIN32
/* in Windows we must have write access at the file */
flags |= O_RDWR;
#else
/* in all others platforms, read access is enough */
flags |= O_RDONLY;
#endif
/* open it */
f = open(path, flags);
if (f == -1) {
/* LCOV_EXCL_START */
log_fatal("Error opening file '%s'. %s.\n", path, strerror(errno));
continue;
/* LCOV_EXCL_STOP */
}
/* get the present timestamp, that may be different than the one */
/* in the content file */
ret = fstat(f, &st);
if (ret == -1) {
/* LCOV_EXCL_START */
close(f);
log_fatal("Error accessing file '%s'. %s.\n", path, strerror(errno));
continue;
/* LCOV_EXCL_STOP */
}
/* set the tweaked modification time, with new nano seconds */
ret = fmtime(f, st.st_mtime, nsec);
if (ret != 0) {
/* LCOV_EXCL_START */
close(f);
log_fatal("Error timing file '%s'. %s.\n", path, strerror(errno));
continue;
/* LCOV_EXCL_STOP */
}
/* uses fstat again to get the present timestamp */
/* this is needed because the value read */
/* may be different than the written one */
ret = fstat(f, &st);
if (ret == -1) {
/* LCOV_EXCL_START */
close(f);
log_fatal("Error accessing file '%s'. %s.\n", path, strerror(errno));
continue;
/* LCOV_EXCL_STOP */
}
/* close it */
ret = close(f);
if (ret != 0) {
/* LCOV_EXCL_START */
log_fatal("Error closing file '%s'. %s.\n", path, strerror(errno));
continue;
/* LCOV_EXCL_STOP */
}
/* set the same nanosecond value in the content file */
/* note that if the seconds value is already matching */
/* the file won't be synced because the content file will */
/* contain the new updated timestamp */
file->mtime_nsec = STAT_NSEC(&st);
/* state changed, we need to update it */
state->need_write = 1;
log_tag("touch:%s:%s: %" PRIu64 ".%d\n", disk->name, esc_tag(file->sub, esc_buffer), (uint64_t)st.st_mtime, STAT_NSEC(&st));
msg_info("touch %s\n", fmt_term(disk, file->sub, esc_buffer));
}
}
}
}
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