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: select PLATFORM_LINUX 11//config: help 12//config: Ask kernel to rescan partition table. 13 14//applet:IF_PARTPROBE(APPLET_NOEXEC(partprobe, partprobe, BB_DIR_USR_SBIN, BB_SUID_DROP, partprobe)) 15 16//kbuild:lib-$(CONFIG_PARTPROBE) += partprobe.o 17 18#include <linux/fs.h> 19#include "libbb.h" 20#ifndef BLKRRPART 21# define BLKRRPART _IO(0x12,95) 22#endif 23 24//usage:#define partprobe_trivial_usage 25//usage: "DEVICE..." 26//usage:#define partprobe_full_usage "\n\n" 27//usage: "Ask kernel to rescan partition table" 28// 29// partprobe (GNU parted) 3.2: 30// -d, --dry-run Don't update the kernel 31// -s, --summary Show a summary of devices and their partitions 32 33int partprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 34int partprobe_main(int argc UNUSED_PARAM, char **argv) 35{ 36 getopt32(argv, ""); 37 argv += optind; 38 39 /* "partprobe" with no arguments just does nothing */ 40 41 while (*argv) { 42 int fd = xopen(*argv, O_RDONLY); 43 /* 44 * Newer versions of parted scan partition tables themselves and 45 * use BLKPG ioctl (BLKPG_DEL_PARTITION / BLKPG_ADD_PARTITION) 46 * since this way kernel does not need to know 47 * partition table formats. 48 * We use good old BLKRRPART: 49 */ 50 ioctl_or_perror_and_die(fd, BLKRRPART, NULL, "%s", *argv); 51 close(fd); 52 argv++; 53 } 54 55 return EXIT_SUCCESS; 56} 57