92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
|
|
|
|
#include <fcntl.h>
|
|
#include <sys/prctl.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
#include "alloc-util.h"
|
|
#include "blockdev-util.h"
|
|
#include "dissect-image.h"
|
|
#include "fd-util.h"
|
|
#include "main-func.h"
|
|
#include "process-util.h"
|
|
#include "signal-util.h"
|
|
#include "string-util.h"
|
|
|
|
static int makefs(const char *type, const char *device) {
|
|
const char *mkfs;
|
|
pid_t pid;
|
|
int r;
|
|
|
|
if (streq(type, "swap"))
|
|
mkfs = "/sbin/mkswap";
|
|
else
|
|
mkfs = strjoina("/sbin/mkfs.", type);
|
|
if (access(mkfs, X_OK) != 0)
|
|
return log_error_errno(errno, "%s is not executable: %m", mkfs);
|
|
|
|
r = safe_fork("(mkfs)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG, &pid);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0) {
|
|
const char *cmdline[3] = { mkfs, device, NULL };
|
|
|
|
/* Child */
|
|
|
|
execv(cmdline[0], (char**) cmdline);
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
|
|
return wait_for_terminate_and_check(mkfs, pid, WAIT_LOG);
|
|
}
|
|
|
|
static int run(int argc, char *argv[]) {
|
|
_cleanup_free_ char *device = NULL, *type = NULL, *detected = NULL;
|
|
_cleanup_close_ int lock_fd = -1;
|
|
struct stat st;
|
|
int r;
|
|
|
|
log_setup_service();
|
|
|
|
if (argc != 3)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"This program expects two arguments.");
|
|
|
|
/* type and device must be copied because makefs calls safe_fork, which clears argv[] */
|
|
type = strdup(argv[1]);
|
|
if (!type)
|
|
return log_oom();
|
|
|
|
device = strdup(argv[2]);
|
|
if (!device)
|
|
return log_oom();
|
|
|
|
if (stat(device, &st) < 0)
|
|
return log_error_errno(errno, "Failed to stat \"%s\": %m", device);
|
|
|
|
if (S_ISBLK(st.st_mode)) {
|
|
/* Lock the device so that udev doesn't interfere with our work */
|
|
|
|
lock_fd = lock_whole_block_device(st.st_rdev, LOCK_EX);
|
|
if (lock_fd < 0)
|
|
return log_error_errno(lock_fd, "Failed to lock whole block device of \"%s\": %m", device);
|
|
} else
|
|
log_info("%s is not a block device.", device);
|
|
|
|
r = probe_filesystem(device, &detected);
|
|
if (r == -EUCLEAN)
|
|
return log_error_errno(r, "Ambiguous results of probing for file system on \"%s\", refusing to proceed.", device);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to probe \"%s\": %m", device);
|
|
if (detected) {
|
|
log_info("'%s' is not empty (contains file system of type %s), exiting.", device, detected);
|
|
return 0;
|
|
}
|
|
|
|
return makefs(type, device);
|
|
}
|
|
|
|
DEFINE_MAIN_FUNCTION(run);
|