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e1878ef72a
Let's allow users to configure the (logical) sector size of their image. This is required when building images for a 4k sector size disk on a 512b sector size host or vice-versa.
77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <fcntl.h>
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#include <sys/file.h>
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#include <sys/prctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "alloc-util.h"
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#include "blockdev-util.h"
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#include "dissect-image.h"
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#include "fd-util.h"
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#include "main-func.h"
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#include "mkfs-util.h"
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#include "path-util.h"
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#include "process-util.h"
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#include "signal-util.h"
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#include "string-util.h"
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static int run(int argc, char *argv[]) {
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_cleanup_free_ char *device = NULL, *fstype = NULL, *detected = NULL, *label = NULL;
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_cleanup_close_ int lock_fd = -EBADF;
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sd_id128_t uuid;
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struct stat st;
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int r;
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log_setup();
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if (argc != 3)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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"This program expects two arguments.");
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/* type and device must be copied because makefs calls safe_fork, which clears argv[] */
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fstype = strdup(argv[1]);
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if (!fstype)
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return log_oom();
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device = strdup(argv[2]);
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if (!device)
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return log_oom();
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if (stat(device, &st) < 0)
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return log_error_errno(errno, "Failed to stat \"%s\": %m", device);
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if (S_ISBLK(st.st_mode)) {
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/* Lock the device so that udev doesn't interfere with our work */
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lock_fd = lock_whole_block_device(st.st_rdev, LOCK_EX);
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if (lock_fd < 0)
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return log_error_errno(lock_fd, "Failed to lock whole block device of \"%s\": %m", device);
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} else
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log_debug("%s is not a block device, no need to lock.", device);
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r = probe_filesystem(device, &detected);
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if (r == -EUCLEAN)
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return log_error_errno(r, "Ambiguous results of probing for file system on \"%s\", refusing to proceed.", device);
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if (r < 0)
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return log_error_errno(r, "Failed to probe \"%s\": %m", device);
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if (detected) {
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log_info("'%s' is not empty (contains file system of type %s), exiting.", device, detected);
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return 0;
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}
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r = sd_id128_randomize(&uuid);
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if (r < 0)
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return log_error_errno(r, "Failed to generate UUID for file system: %m");
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r = path_extract_filename(device, &label);
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if (r < 0)
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return log_error_errno(r, "Failed to extract file name from '%s': %m", device);
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return make_filesystem(device, fstype, label, NULL, uuid, true, 0, NULL);
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}
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DEFINE_MAIN_FUNCTION(run);
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