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| -rw-r--r-- | miscutils/partprobe.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/miscutils/partprobe.c b/miscutils/partprobe.c new file mode 100644 index 0000000..3883159 --- /dev/null +++ b/miscutils/partprobe.c @@ -0,0 +1,56 @@ +/* vi: set sw=4 ts=4: */ +/* + * Copyright (C) 2017 Denys Vlasenko <vda.linux@googlemail.com> + * + * 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; +} |