This source file includes following definitions.
- apply_timestamp
- main
#include "util.h"
#include "label.h"
#define MESSAGE \
"This file was created by systemd-update-done. Its only \n" \
"purpose is to hold a timestamp of the time this directory\n" \
"was updated. See systemd-update-done.service(8).\n"
static int apply_timestamp(const char *path, struct timespec *ts) {
struct timespec twice[2];
struct stat st;
assert(path);
assert(ts);
if (stat(path, &st) >= 0) {
if (st.st_mtim.tv_sec > ts->tv_sec ||
(st.st_mtim.tv_sec == ts->tv_sec && st.st_mtim.tv_nsec >= ts->tv_nsec))
return 0;
twice[0] = *ts;
twice[1] = *ts;
if (utimensat(AT_FDCWD, path, twice, AT_SYMLINK_NOFOLLOW) < 0) {
if (errno == EROFS) {
log_debug("Can't update timestamp file %s, file system is read-only.", path);
return 0;
}
log_error("Failed to update timestamp on %s: %m", path);
return -errno;
}
} else if (errno == ENOENT) {
_cleanup_close_ int fd = -1;
int r;
r = mac_selinux_create_file_prepare(path, S_IFREG);
if (r < 0) {
log_error("Failed to set SELinux context for %s: %s",
path, strerror(-r));
return r;
}
fd = open(path, O_CREAT|O_EXCL|O_WRONLY|O_TRUNC|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0644);
mac_selinux_create_file_clear();
if (fd < 0) {
if (errno == EROFS) {
log_debug("Can't create timestamp file %s, file system is read-only.", path);
return 0;
}
log_error("Failed to create timestamp file %s: %m", path);
return -errno;
}
(void) loop_write(fd, MESSAGE, strlen(MESSAGE), false);
twice[0] = *ts;
twice[1] = *ts;
if (futimens(fd, twice) < 0) {
log_error("Failed to update timestamp on %s: %m", path);
return -errno;
}
} else {
log_error("Failed to stat() timestamp file %s: %m", path);
return -errno;
}
return 0;
}
int main(int argc, char *argv[]) {
struct stat st;
int r, q = 0;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
if (stat("/usr", &st) < 0) {
log_error("Failed to stat /usr: %m");
return EXIT_FAILURE;
}
r = mac_selinux_init(NULL);
if (r < 0) {
log_error("SELinux setup failed: %s", strerror(-r));
goto finish;
}
r = apply_timestamp("/etc/.updated", &st.st_mtim);
q = apply_timestamp("/var/.updated", &st.st_mtim);
finish:
return r < 0 || q < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}