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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <fcntl.h>
#include <sys/file.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 "mkfs-util.h"
#include "path-util.h"
#include "process-util.h"
#include "signal-util.h"
#include "string-util.h"
static int run(int argc, char *argv[]) {
_cleanup_free_ char *device = NULL, *fstype = NULL, *detected = NULL, *label = NULL;
_cleanup_close_ int lock_fd = -EBADF;
sd_id128_t uuid;
struct stat st;
int r;
log_setup();
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[] */
fstype = strdup(argv[1]);
if (!fstype)
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_debug("%s is not a block device, no need to lock.", 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;
}
r = sd_id128_randomize(&uuid);
if (r < 0)
return log_error_errno(r, "Failed to generate UUID for file system: %m");
r = path_extract_filename(device, &label);
if (r < 0)
return log_error_errno(r, "Failed to extract file name from '%s': %m", device);
return make_filesystem(device, fstype, label, NULL, uuid, true, NULL);
}
DEFINE_MAIN_FUNCTION(run);
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