Zbigniew Jędrzejewski-Szmek | b7f28ac | 2017-11-26 22:51:29 +0100 | [diff] [blame] | 1 | /*** |
| 2 | SPDX-License-Identifier: LGPL-2.1+ |
Zbigniew Jędrzejewski-Szmek | b7f28ac | 2017-11-26 22:51:29 +0100 | [diff] [blame] | 3 | ***/ |
| 4 | |
| 5 | #include <fcntl.h> |
| 6 | #include <signal.h> |
| 7 | #include <sys/prctl.h> |
| 8 | #include <sys/stat.h> |
| 9 | #include <sys/types.h> |
| 10 | #include <unistd.h> |
| 11 | |
| 12 | #include "alloc-util.h" |
| 13 | #include "dissect-image.h" |
Lennart Poettering | dccca82 | 2018-01-11 00:39:12 +0100 | [diff] [blame] | 14 | #include "process-util.h" |
Zbigniew Jędrzejewski-Szmek | b7f28ac | 2017-11-26 22:51:29 +0100 | [diff] [blame] | 15 | #include "signal-util.h" |
| 16 | #include "string-util.h" |
| 17 | |
| 18 | static int makefs(const char *type, const char *device) { |
| 19 | const char *mkfs; |
| 20 | pid_t pid; |
Lennart Poettering | 4c253ed | 2017-12-22 13:08:14 +0100 | [diff] [blame] | 21 | int r; |
Zbigniew Jędrzejewski-Szmek | b7f28ac | 2017-11-26 22:51:29 +0100 | [diff] [blame] | 22 | |
| 23 | if (streq(type, "swap")) |
| 24 | mkfs = "/sbin/mkswap"; |
| 25 | else |
| 26 | mkfs = strjoina("/sbin/mkfs.", type); |
| 27 | if (access(mkfs, X_OK) != 0) |
| 28 | return log_error_errno(errno, "%s is not executable: %m", mkfs); |
| 29 | |
Lennart Poettering | b6e1fff | 2017-12-27 21:49:19 +0100 | [diff] [blame] | 30 | r = safe_fork("(fsck)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid); |
Lennart Poettering | 4c253ed | 2017-12-22 13:08:14 +0100 | [diff] [blame] | 31 | if (r < 0) |
Lennart Poettering | b6e1fff | 2017-12-27 21:49:19 +0100 | [diff] [blame] | 32 | return r; |
Lennart Poettering | 4c253ed | 2017-12-22 13:08:14 +0100 | [diff] [blame] | 33 | if (r == 0) { |
Zbigniew Jędrzejewski-Szmek | b7f28ac | 2017-11-26 22:51:29 +0100 | [diff] [blame] | 34 | const char *cmdline[3] = { mkfs, device, NULL }; |
| 35 | |
| 36 | /* Child */ |
Zbigniew Jędrzejewski-Szmek | b7f28ac | 2017-11-26 22:51:29 +0100 | [diff] [blame] | 37 | |
| 38 | execv(cmdline[0], (char**) cmdline); |
| 39 | _exit(EXIT_FAILURE); |
| 40 | } |
| 41 | |
Lennart Poettering | 7d4904f | 2017-12-28 00:51:19 +0100 | [diff] [blame] | 42 | return wait_for_terminate_and_check(mkfs, pid, WAIT_LOG); |
Zbigniew Jędrzejewski-Szmek | b7f28ac | 2017-11-26 22:51:29 +0100 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | int main(int argc, char *argv[]) { |
| 46 | const char *device, *type; |
| 47 | _cleanup_free_ char *detected = NULL; |
| 48 | struct stat st; |
| 49 | int r; |
| 50 | |
| 51 | log_set_target(LOG_TARGET_AUTO); |
| 52 | log_parse_environment(); |
| 53 | log_open(); |
| 54 | |
| 55 | if (argc != 3) { |
| 56 | log_error("This program expects two arguments."); |
| 57 | return EXIT_FAILURE; |
| 58 | } |
| 59 | |
| 60 | type = argv[1]; |
| 61 | device = argv[2]; |
| 62 | |
| 63 | if (stat(device, &st) < 0) { |
| 64 | r = log_error_errno(errno, "Failed to stat \"%s\": %m", device); |
| 65 | goto finish; |
| 66 | } |
| 67 | |
| 68 | if (!S_ISBLK(st.st_mode)) |
| 69 | log_info("%s is not a block device.", device); |
| 70 | |
| 71 | r = probe_filesystem(device, &detected); |
| 72 | if (r < 0) { |
Zbigniew Jędrzejewski-Szmek | 7cc84b2 | 2017-11-30 12:09:36 +0100 | [diff] [blame] | 73 | log_warning_errno(r, |
| 74 | r == -EUCLEAN ? |
| 75 | "Cannot reliably determine probe \"%s\", refusing to proceed." : |
| 76 | "Failed to probe \"%s\": %m", |
| 77 | device); |
Zbigniew Jędrzejewski-Szmek | b7f28ac | 2017-11-26 22:51:29 +0100 | [diff] [blame] | 78 | goto finish; |
| 79 | } |
| 80 | |
| 81 | if (detected) { |
| 82 | log_info("%s is not empty (type %s), exiting", device, detected); |
| 83 | goto finish; |
| 84 | } |
| 85 | |
| 86 | r = makefs(type, device); |
| 87 | |
| 88 | finish: |
| 89 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
| 90 | } |