/* vi: set sw=4 ts=4: */ /* Ported to busybox from mtd-utils. * * Licensed under GPLv2, see file LICENSE in this source tree. */ //usage:#define flash_lock_trivial_usage //usage: "MTD_DEVICE OFFSET SECTORS" //usage:#define flash_lock_full_usage "\n\n" //usage: "Lock part or all of an MTD device. If SECTORS is -1, then all sectors\n" //usage: "will be locked, regardless of the value of OFFSET" //usage: //usage:#define flash_unlock_trivial_usage //usage: "MTD_DEVICE" //usage:#define flash_unlock_full_usage "\n\n" //usage: "Unlock an MTD device" #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; }