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authorDenys Vlasenko <vda.linux@googlemail.com>2009-05-25 04:15:37 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2009-05-25 04:15:37 +0200
commitbf2af9acb28ed6d8bbe351d669daaa140d0239f0 (patch)
tree3adba401caf5c25406f89ebe053a0d9dbb043b54 /miscutils
parent4f26c97b9a2fdf6d967eafa06c67d04e432840a1 (diff)
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flash_lock, flash_unlock: new applets
By Thierry Reding (thierry.reding AT avionic-design.de) Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils')
-rw-r--r--miscutils/Config.in14
-rw-r--r--miscutils/Kbuild4
-rw-r--r--miscutils/flash_lock_unlock.c69
3 files changed, 86 insertions, 1 deletions
diff --git a/miscutils/Config.in b/miscutils/Config.in
index 7feaf4a87..06ff51a7c 100644
--- a/miscutils/Config.in
+++ b/miscutils/Config.in
@@ -250,6 +250,20 @@ config FBSPLASH
250 "NN" (ASCII decimal number) - percentage to show on progress bar 250 "NN" (ASCII decimal number) - percentage to show on progress bar
251 "exit" - well you guessed it 251 "exit" - well you guessed it
252 252
253config FLASH_LOCK
254 bool "flash_lock"
255 default n
256 help
257 The flash_lock binary from mtd-utils as of git head 5ec0c10d0. This
258 utility locks part or all of the flash device.
259
260config FLASH_UNLOCK
261 bool "flash_unlock"
262 default n
263 help
264 The flash_unlock binary from mtd-utils as of git head 5ec0c10d0. This
265 utility unlocks part or all of the flash device.
266
253config FLASH_ERASEALL 267config FLASH_ERASEALL
254 bool "flash_eraseall" 268 bool "flash_eraseall"
255 default n 269 default n
diff --git a/miscutils/Kbuild b/miscutils/Kbuild
index 23d7d8d49..8ae8a488a 100644
--- a/miscutils/Kbuild
+++ b/miscutils/Kbuild
@@ -16,7 +16,9 @@ lib-$(CONFIG_DEVFSD) += devfsd.o
16lib-$(CONFIG_DEVMEM) += devmem.o 16lib-$(CONFIG_DEVMEM) += devmem.o
17lib-$(CONFIG_EJECT) += eject.o 17lib-$(CONFIG_EJECT) += eject.o
18lib-$(CONFIG_FBSPLASH) += fbsplash.o 18lib-$(CONFIG_FBSPLASH) += fbsplash.o
19lib-$(CONFIG_FLASH_ERASEALL) += flash_eraseall.o 19lib-$(CONFIG_FLASH_ERASEALL) += flash_eraseall.o
20lib-$(CONFIG_FLASH_LOCK) += flash_lock_unlock.o
21lib-$(CONFIG_FLASH_UNLOCK) += flash_lock_unlock.o
20lib-$(CONFIG_IONICE) += ionice.o 22lib-$(CONFIG_IONICE) += ionice.o
21lib-$(CONFIG_HDPARM) += hdparm.o 23lib-$(CONFIG_HDPARM) += hdparm.o
22lib-$(CONFIG_INOTIFYD) += inotifyd.o 24lib-$(CONFIG_INOTIFYD) += inotifyd.o
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 @@
1/* vi: set sw=4 ts=4: */
2/* Ported to busybox from mtd-utils.
3 *
4 * Licensed under GPLv2, see file LICENSE in this tarball for details.
5 */
6#include "libbb.h"
7#include <mtd/mtd-user.h>
8
9int flash_lock_unlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
10int flash_lock_unlock_main(int argc UNUSED_PARAM, char **argv)
11{
12 /* note: fields in these structs are 32-bits.
13 * apparently we can't win anything by using off_t
14 * or long long's for offset and/or sectors vars. */
15 struct mtd_info_user info;
16 struct erase_info_user lock;
17 unsigned long offset;
18 long sectors;
19 int fd;
20
21#define do_lock (ENABLE_FLASH_LOCK && (!ENABLE_FLASH_UNLOCK || (applet_name[6] == 'l')))
22
23 if (!argv[1])
24 bb_show_usage();
25
26 /* parse offset and number of sectors to lock */
27 offset = 0;
28 sectors = -1;
29 if (do_lock) {
30 if (!argv[2] || !argv[3])
31 bb_show_usage();
32 offset = xstrtoul(argv[2], 0);
33 sectors = xstrtol(argv[3], 0);
34 }
35
36 fd = xopen(argv[1], O_RDWR);
37
38 xioctl(fd, MEMGETINFO, &info);
39
40 lock.start = 0;
41 lock.length = info.size;
42 if (do_lock) {
43 unsigned long size = info.size - info.erasesize;
44 if (offset > size) {
45 bb_error_msg_and_die("%lx is beyond device size %lx\n",
46 offset, size);
47 }
48
49 if (sectors == -1) {
50 sectors = info.size / info.erasesize;
51 } else {
52// isn't this useless?
53 unsigned long num = info.size / info.erasesize;
54 if (sectors > num) {
55 bb_error_msg_and_die("%ld are too many "
56 "sectors, device only has "
57 "%ld\n", sectors, num);
58 }
59 }
60
61 lock.start = offset;
62 lock.length = sectors * info.erasesize;
63 xioctl(fd, MEMLOCK, &lock);
64 } else {
65 xioctl(fd, MEMUNLOCK, &lock);
66 }
67
68 return EXIT_SUCCESS;
69}