From bf2af9acb28ed6d8bbe351d669daaa140d0239f0 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Mon, 25 May 2009 04:15:37 +0200 Subject: flash_lock, flash_unlock: new applets By Thierry Reding (thierry.reding AT avionic-design.de) Signed-off-by: Thierry Reding Signed-off-by: Denys Vlasenko --- miscutils/flash_lock_unlock.c | 69 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 miscutils/flash_lock_unlock.c (limited to 'miscutils/flash_lock_unlock.c') diff --git a/miscutils/flash_lock_unlock.c b/miscutils/flash_lock_unlock.c new file mode 100644 index 000000000..f4e2f73b2 --- /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 + +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; +} -- cgit v1.2.3