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-rw-r--r--src/partition/makefs.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/src/partition/makefs.c b/src/partition/makefs.c
new file mode 100644
index 0000000..fd924d2
--- /dev/null
+++ b/src/partition/makefs.c
@@ -0,0 +1,71 @@
+/* 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 "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;
+ _cleanup_close_ int lock_fd = -1;
+ sd_id128_t uuid;
+ 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[] */
+ 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_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;
+ }
+
+ r = sd_id128_randomize(&uuid);
+ if (r < 0)
+ return log_error_errno(r, "Failed to generate UUID for file system: %m");
+
+ return make_filesystem(device, fstype, basename(device), uuid, true);
+}
+
+DEFINE_MAIN_FUNCTION(run);