1 /* vi: set sw=4 ts=4: */
2 /*
3 * Copyright (C) 2017 Denys Vlasenko <vda.linux@googlemail.com>
4 *
5 * Licensed under GPLv2, see file LICENSE in this source tree.
6 */
7 //config:config PARTPROBE
8 //config: bool "partprobe (3.5 kb)"
9 //config: default y
10 //config: help
11 //config: Ask kernel to rescan partition table.
12
13 //applet:IF_PARTPROBE(APPLET_NOEXEC(partprobe, partprobe, BB_DIR_USR_SBIN, BB_SUID_DROP, partprobe))
14
15 //kbuild:lib-$(CONFIG_PARTPROBE) += partprobe.o
16
17 #include <linux/fs.h>
18 #include "libbb.h"
19 #ifndef BLKRRPART
20 # define BLKRRPART _IO(0x12,95)
21 #endif
22
23 //usage:#define partprobe_trivial_usage
24 //usage: "DEVICE..."
25 //usage:#define partprobe_full_usage "\n\n"
26 //usage: "Ask kernel to rescan partition table"
27 //
28 // partprobe (GNU parted) 3.2:
29 // -d, --dry-run Don't update the kernel
30 // -s, --summary Show a summary of devices and their partitions
31
32 int partprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
partprobe_main(int argc UNUSED_PARAM,char ** argv)33 int partprobe_main(int argc UNUSED_PARAM, char **argv)
34 {
35 getopt32(argv, "");
36 argv += optind;
37
38 /* "partprobe" with no arguments just does nothing */
39
40 while (*argv) {
41 int fd = xopen(*argv, O_RDONLY);
42 /*
43 * Newer versions of parted scan partition tables themselves and
44 * use BLKPG ioctl (BLKPG_DEL_PARTITION / BLKPG_ADD_PARTITION)
45 * since this way kernel does not need to know
46 * partition table formats.
47 * We use good old BLKRRPART:
48 */
49 ioctl_or_perror_and_die(fd, BLKRRPART, NULL, "%s", *argv);
50 close(fd);
51 argv++;
52 }
53
54 return EXIT_SUCCESS;
55 }
56