diff options
Diffstat (limited to 'miscutils')
| -rw-r--r-- | miscutils/Config.in | 14 | ||||
| -rw-r--r-- | miscutils/Kbuild | 4 | ||||
| -rw-r--r-- | miscutils/flash_lock_unlock.c | 69 |
3 files changed, 86 insertions, 1 deletions
diff --git a/miscutils/Config.in b/miscutils/Config.in index 7feaf4a..06ff51a 100644 --- a/miscutils/Config.in +++ b/miscutils/Config.in @@ -250,6 +250,20 @@ config FBSPLASH "NN" (ASCII decimal number) - percentage to show on progress bar "exit" - well you guessed it +config FLASH_LOCK + bool "flash_lock" + default n + help + The flash_lock binary from mtd-utils as of git head 5ec0c10d0. This + utility locks part or all of the flash device. + +config FLASH_UNLOCK + bool "flash_unlock" + default n + help + The flash_unlock binary from mtd-utils as of git head 5ec0c10d0. This + utility unlocks part or all of the flash device. + config FLASH_ERASEALL bool "flash_eraseall" default n diff --git a/miscutils/Kbuild b/miscutils/Kbuild index 23d7d8d..8ae8a48 100644 --- a/miscutils/Kbuild +++ b/miscutils/Kbuild @@ -16,7 +16,9 @@ lib-$(CONFIG_DEVFSD) += devfsd.o lib-$(CONFIG_DEVMEM) += devmem.o lib-$(CONFIG_EJECT) += eject.o lib-$(CONFIG_FBSPLASH) += fbsplash.o -lib-$(CONFIG_FLASH_ERASEALL) += flash_eraseall.o +lib-$(CONFIG_FLASH_ERASEALL) += flash_eraseall.o +lib-$(CONFIG_FLASH_LOCK) += flash_lock_unlock.o +lib-$(CONFIG_FLASH_UNLOCK) += flash_lock_unlock.o lib-$(CONFIG_IONICE) += ionice.o lib-$(CONFIG_HDPARM) += hdparm.o lib-$(CONFIG_INOTIFYD) += inotifyd.o diff --git a/miscutils/flash_lock_unlock.c b/miscutils/flash_lock_unlock.c new file mode 100644 index 0000000..f4e2f73 --- /dev/null +++ b/miscutils/flash_lock_unlock.c @@ -0,0 +1,69 @@ +/* vi: set sw=4 ts=4: */ +/* Ported to busybox from mtd-utils. + * + * Licensed under GPLv2, see file LICENSE in this tarball for details. + */ +#include "libbb.h" +#include <mtd/mtd-user.h> + +int flash_lock_unlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int flash_lock_unlock_main(int argc UNUSED_PARAM, char **argv) +{ + /* note: fields in these structs are 32-bits. + * apparently we can't win anything by using off_t + * or long long's for offset and/or sectors vars. */ + struct mtd_info_user info; + struct erase_info_user lock; + unsigned long offset; + long sectors; + int fd; + +#define do_lock (ENABLE_FLASH_LOCK && (!ENABLE_FLASH_UNLOCK || (applet_name[6] == 'l'))) + + if (!argv[1]) + bb_show_usage(); + + /* parse offset and number of sectors to lock */ + offset = 0; + sectors = -1; + if (do_lock) { + if (!argv[2] || !argv[3]) + bb_show_usage(); + offset = xstrtoul(argv[2], 0); + sectors = xstrtol(argv[3], 0); + } + + fd = xopen(argv[1], O_RDWR); + + xioctl(fd, MEMGETINFO, &info); + + lock.start = 0; + lock.length = info.size; + if (do_lock) { + unsigned long size = info.size - info.erasesize; + if (offset > size) { + bb_error_msg_and_die("%lx is beyond device size %lx\n", + offset, size); + } + + if (sectors == -1) { + sectors = info.size / info.erasesize; + } else { +// isn't this useless? + unsigned long num = info.size / info.erasesize; + if (sectors > num) { + bb_error_msg_and_die("%ld are too many " + "sectors, device only has " + "%ld\n", sectors, num); + } + } + + lock.start = offset; + lock.length = sectors * info.erasesize; + xioctl(fd, MEMLOCK, &lock); + } else { + xioctl(fd, MEMUNLOCK, &lock); + } + + return EXIT_SUCCESS; +} |