ac47a00e2
Denys Vlasenko
2017-04-11
Subject
partprobe: new applet
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miscutils/partprobe.c+56 -0
| @@ -0,0 +1,56 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Copyright (C) 2017 Denys Vlasenko <[email protected]> |
| + | * |
| + | * Licensed under GPLv2, see file LICENSE in this source tree. |
| + | */ |
| + | //config:config PARTPROBE |
| + | //config: bool "partprobe" |
| + | //config: default y |
| + | //config: select PLATFORM_LINUX |
| + | //config: help |
| + | //config: Ask kernel to rescan partition table. |
| + | |
| + | //applet:IF_PARTPROBE(APPLET(partprobe, BB_DIR_USR_SBIN, BB_SUID_DROP)) |
| + | |
| + | //kbuild:lib-$(CONFIG_PARTPROBE) += partprobe.o |
| + | |
| + | #include <linux/fs.h> |
| + | #include "libbb.h" |
| + | #ifndef BLKRRPART |
| + | # define BLKRRPART _IO(0x12,95) |
| + | #endif |
| + | |
| + | //usage:#define partprobe_trivial_usage |
| + | //usage: "DEVICE..." |
| + | //usage:#define partprobe_full_usage "\n\n" |
| + | //usage: "Ask kernel to rescan partition table" |
| + | // |
| + | // partprobe (GNU parted) 3.2: |
| + | // -d, --dry-run Don't update the kernel |
| + | // -s, --summary Show a summary of devices and their partitions |
| + | |
| + | int partprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| + | int partprobe_main(int argc UNUSED_PARAM, char **argv) |
| + | { |
| + | getopt32(argv, ""); |
| + | argv += optind; |
| + | |
| + | /* "partprobe" with no arguments just does nothing */ |
| + | |
| + | while (*argv) { |
| + | int fd = xopen(*argv, O_RDONLY); |
| + | /* |
| + | * Newer versions of parted scan partition tables themselves and |
| + | * use BLKPG ioctl (BLKPG_DEL_PARTITION / BLKPG_ADD_PARTITION) |
| + | * since this way kernel does not need to know |
| + | * partition table formats. |
| + | * We use good old BLKRRPART: |
| + | */ |
| + | ioctl_or_perror_and_die(fd, BLKRRPART, NULL, "%s", *argv); |
| + | close(fd); |
| + | argv++; |
| + | } |
| + | |
| + | return EXIT_SUCCESS; |
| + | } |