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 32int partprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 33int 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