3945bc153
Denys Vlasenko
2009-10-22
Subject
tune2fs: new applet by Vladimir. Only supports -L LABEL
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Commit Diff GitHub →
include/applets.h+1 -1
| @@ -396,7 +396,7 @@ IF_TRUE(APPLET_NOFORK(true, true, _BB_DIR_BIN, _BB_SUID_DROP, true)) | |
| IF_TTY(APPLET(tty, _BB_DIR_USR_BIN, _BB_SUID_DROP)) | |
| IF_TTYSIZE(APPLET(ttysize, _BB_DIR_USR_BIN, _BB_SUID_DROP)) | |
| IF_TUNCTL(APPLET(tunctl, _BB_DIR_SBIN, _BB_SUID_DROP)) | |
| - | //IF_TUNE2FS(APPLET(tune2fs, _BB_DIR_SBIN, _BB_SUID_DROP)) |
| + | IF_MKFS_EXT2(APPLET(tune2fs, _BB_DIR_SBIN, _BB_SUID_DROP)) |
| IF_APP_UDHCPC(APPLET(udhcpc, _BB_DIR_SBIN, _BB_SUID_DROP)) | |
| IF_APP_UDHCPD(APPLET(udhcpd, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) | |
| IF_UDPSVD(APPLET_ODDNAME(udpsvd, tcpudpsvd, _BB_DIR_USR_BIN, _BB_SUID_DROP, udpsvd)) | |
include/usage.h+10 -8
| @@ -4666,22 +4666,24 @@ | |
| "\n -f name tun device (/dev/net/tun)" \ | |
| "\n -t name Create iface 'name'" \ | |
| "\n -d name Delete iface 'name'" \ | |
| - | IF_FEATURE_TUNCTL_UG( \ |
| + | IF_FEATURE_TUNCTL_UG( \ |
| "\n -u owner Set iface owner" \ | |
| "\n -g group Set iface group" \ | |
| "\n -b Brief output" \ | |
| - | ) |
| + | ) |
| #define tunctl_example_usage \ | |
| "# tunctl\n" \ | |
| "# tunctl -d tun0\n" | |
| #define tune2fs_trivial_usage \ | |
| - | "[-c max-mounts-count] [-e errors-behavior] [-g group] " \ |
| - | "[-i interval[d|m|w]] [-j] [-J journal-options] [-l] [-s sparse-flag] " \ |
| - | "[-m reserved-blocks-percent] [-o [^]mount-options[,...]] " \ |
| - | "[-r reserved-blocks-count] [-u user] [-C mount-count] " \ |
| - | "[-L volume-label] [-M last-mounted-dir] [-O [^]feature[,...]] " \ |
| - | "[-T last-check-time] [-U UUID] device" |
| + | /* "[-c max-mounts-count] [-e errors-behavior] [-g group] " */ \ |
| + | /* "[-i interval[d|m|w]] [-j] [-J journal-options] [-l] [-s sparse-flag] " */ \ |
| + | /* "[-m reserved-blocks-percent] [-o [^]mount-options[,...]] " */ \ |
| + | /* "[-r reserved-blocks-count] [-u user] [-C mount-count] " */ \ |
| + | "[-L LABEL] " \ |
| + | /* "[-M last-mounted-dir] [-O [^]feature[,...]] " */ \ |
| + | /* "[-T last-check-time] [-U UUID] " */ \ |
| + | "BLOCKDEV" |
| #define tune2fs_full_usage "\n\n" \ | |
| "Adjust filesystem options on ext[23] filesystems" | |
util-linux/Kbuild+1 -0
| @@ -38,4 +38,5 @@ lib-$(CONFIG_SCRIPTREPLAY) += scriptreplay.o | |
| lib-$(CONFIG_SETARCH) += setarch.o | |
| lib-$(CONFIG_SWAPONOFF) += swaponoff.o | |
| lib-$(CONFIG_SWITCH_ROOT) += switch_root.o | |
| + | lib-$(CONFIG_MKFS_EXT2) += tune2fs.o |
| lib-$(CONFIG_UMOUNT) += umount.o | |
util-linux/tune2fs.c+71 -0
| @@ -0,0 +1,71 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * tune2fs: utility to modify EXT2 filesystem |
| + | * |
| + | * Busybox'ed (2009) by Vladimir Dronnikov <[email protected]> |
| + | * |
| + | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
| + | */ |
| + | #include "libbb.h" |
| + | #include <linux/fs.h> |
| + | #include <linux/ext2_fs.h> |
| + | #include "volume_id/volume_id_internal.h" |
| + | |
| + | // storage helpers |
| + | char BUG_wrong_field_size(void); |
| + | #define STORE_LE(field, value) \ |
| + | do { \ |
| + | if (sizeof(field) == 4) \ |
| + | field = cpu_to_le32(value); \ |
| + | else if (sizeof(field) == 2) \ |
| + | field = cpu_to_le16(value); \ |
| + | else if (sizeof(field) == 1) \ |
| + | field = (value); \ |
| + | else \ |
| + | BUG_wrong_field_size(); \ |
| + | } while (0) |
| + | |
| + | #define FETCH_LE32(field) \ |
| + | (sizeof(field) == 4 ? cpu_to_le32(field) : BUG_wrong_field_size()) |
| + | |
| + | enum { |
| + | OPT_L = 1 << 0, // label |
| + | }; |
| + | |
| + | int tune2fs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| + | int tune2fs_main(int argc UNUSED_PARAM, char **argv) |
| + | { |
| + | unsigned opts; |
| + | const char *label; |
| + | struct ext2_super_block *sb; |
| + | int fd; |
| + | |
| + | opt_complementary = "=1"; |
| + | opts = getopt32(argv, "L:", &label); |
| + | argv += optind; // argv[0] -- device |
| + | |
| + | if (!opts) |
| + | bb_show_usage(); |
| + | |
| + | // read superblock |
| + | fd = xopen(argv[0], O_RDWR); |
| + | xlseek(fd, 1024, SEEK_SET); |
| + | sb = xzalloc(1024); |
| + | xread(fd, sb, 1024); |
| + | |
| + | // mangle superblock |
| + | //STORE_LE(sb->s_wtime, time(NULL)); - why bother? |
| + | // set the label |
| + | if (1 /*opts & OPT_L*/) |
| + | safe_strncpy((char *)sb->s_volume_name, label, sizeof(sb->s_volume_name)); |
| + | // write superblock |
| + | xlseek(fd, 1024, SEEK_SET); |
| + | xwrite(fd, sb, 1024); |
| + | |
| + | if (ENABLE_FEATURE_CLEAN_UP) { |
| + | free(sb); |
| + | } |
| + | |
| + | xclose(fd); |
| + | return EXIT_SUCCESS; |
| + | } |