56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Copyright (C) 2017 Denys Vlasenko <vda.linux@googlemail.com>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//config:config PARTPROBE
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//config: bool "partprobe (3.5 kb)"
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//config: default y
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//config: help
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//config: Ask kernel to rescan partition table.
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//applet:IF_PARTPROBE(APPLET_NOEXEC(partprobe, partprobe, BB_DIR_USR_SBIN, BB_SUID_DROP, partprobe))
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//kbuild:lib-$(CONFIG_PARTPROBE) += partprobe.o
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#include <linux/fs.h>
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#include "libbb.h"
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#ifndef BLKRRPART
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# define BLKRRPART _IO(0x12,95)
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#endif
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//usage:#define partprobe_trivial_usage
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//usage: "DEVICE..."
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//usage:#define partprobe_full_usage "\n\n"
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//usage: "Ask kernel to rescan partition table"
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//
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// partprobe (GNU parted) 3.2:
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// -d, --dry-run Don't update the kernel
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// -s, --summary Show a summary of devices and their partitions
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int partprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int partprobe_main(int argc UNUSED_PARAM, char **argv)
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{
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getopt32(argv, "");
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argv += optind;
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/* "partprobe" with no arguments just does nothing */
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while (*argv) {
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int fd = xopen(*argv, O_RDONLY);
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/*
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* Newer versions of parted scan partition tables themselves and
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* use BLKPG ioctl (BLKPG_DEL_PARTITION / BLKPG_ADD_PARTITION)
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* since this way kernel does not need to know
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* partition table formats.
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* We use good old BLKRRPART:
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*/
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ioctl_or_perror_and_die(fd, BLKRRPART, NULL, "%s", *argv);
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close(fd);
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argv++;
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}
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return EXIT_SUCCESS;
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}
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