nandwrite: new applet
function old new delta
nandwrite_main - 382 +382
packed_usage 27119 27135 +16
applet_names 2275 2285 +10
applet_main 1340 1344 +4
applet_nameofs 670 672 +2
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 4/0 up/down: 414/0) Total: 414 bytes
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/miscutils/nandwrite.c b/miscutils/nandwrite.c
new file mode 100644
index 0000000..a20f7f3
--- /dev/null
+++ b/miscutils/nandwrite.c
@@ -0,0 +1,128 @@
+/*
+ * nandwrite.c - ported to busybox from mtd-utils
+ *
+ * Author: Baruch Siach <baruch@tkos.co.il>, Orex Computed Radiography
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ *
+ * TODO: add support for large (>4GB) MTD devices
+ */
+
+//applet:IF_NANDWRITE(APPLET(nandwrite, _BB_DIR_USR_SBIN, _BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_NANDWRITE) += nandwrite.o
+
+//config:config NANDWRITE
+//config: bool "nandwrite"
+//config: default n
+//config: depends on PLATFORM_LINUX
+//config: help
+//config: Write to the specified MTD device, with bad blocks awareness
+
+#include "libbb.h"
+#include <mtd/mtd-user.h>
+
+//usage:#define nandwrite_trivial_usage
+//usage: "[-p] [-s ADDR] MTD_DEVICE [FILE]"
+//usage:#define nandwrite_full_usage "\n\n"
+//usage: "Write to the specified MTD device\n"
+//usage: "\nOptions:"
+//usage: "\n -p Pad to page size"
+//usage: "\n -s ADDR Start address"
+
+static unsigned next_good_eraseblock(int fd, struct mtd_info_user *meminfo,
+ unsigned block_offset)
+{
+ while (1) {
+ loff_t offs;
+ if (block_offset >= meminfo->size)
+ bb_error_msg_and_die("not enough space in MTD device");
+ offs = block_offset;
+ if (xioctl(fd, MEMGETBADBLOCK, &offs) == 0)
+ return block_offset;
+ /* ioctl returned 1 => "bad block" */
+ printf("Skipping bad block at 0x%08x\n", block_offset);
+ block_offset += meminfo->erasesize;
+ }
+}
+
+int nandwrite_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int nandwrite_main(int argc UNUSED_PARAM, char **argv)
+{
+ unsigned opts;
+ int fd;
+ ssize_t cnt;
+ unsigned mtdoffset, meminfo_writesize;
+ struct mtd_info_user meminfo;
+ unsigned char *filebuf;
+ const char *opt_s = "0";
+ enum {
+ OPT_p = (1 << 0),
+ OPT_s = (1 << 1),
+ };
+
+ opt_complementary = "-1:?2";
+ opts = getopt32(argv, "ps:", &opt_s);
+ argv += optind;
+
+ if (argv[1])
+ xmove_fd(xopen_stdin(argv[1]), STDIN_FILENO);
+
+ fd = xopen(argv[0], O_RDWR);
+ xioctl(fd, MEMGETINFO, &meminfo);
+
+ mtdoffset = xatou(opt_s);
+
+ /* Pull it into a CPU register (hopefully) - smaller code that way */
+ meminfo_writesize = meminfo.writesize;
+
+ if (mtdoffset & (meminfo_writesize - 1))
+ bb_error_msg_and_die("start address is not page aligned");
+
+ filebuf = xmalloc(meminfo_writesize);
+
+ cnt = -1;
+ while (mtdoffset < meminfo.size) {
+ unsigned blockstart = mtdoffset & ~(meminfo.erasesize - 1);
+ if (blockstart == mtdoffset) {
+ /* starting a new eraseblock */
+ mtdoffset = next_good_eraseblock(fd, &meminfo, blockstart);
+ printf("Writing at 0x%08x\n", mtdoffset);
+ }
+ /* get some more data from input */
+ cnt = full_read(STDIN_FILENO, filebuf, meminfo_writesize);
+ if (cnt == 0) {
+ /* even with -p, we do not pad past the end of input
+ * (-p only zero-pads last incomplete page)
+ */
+ break;
+ }
+ if (cnt < meminfo_writesize) {
+ if (!(opts & OPT_p))
+ bb_error_msg_and_die("input size is not rounded up to page size, "
+ "use -p to zero pad");
+ /* zero pad to end of write block */
+ memset(filebuf + cnt, 0, meminfo_writesize - cnt);
+ }
+ xlseek(fd, mtdoffset, SEEK_SET);
+ xwrite(fd, filebuf, meminfo_writesize);
+ mtdoffset += meminfo_writesize;
+ if (cnt < meminfo_writesize)
+ break;
+ }
+
+ if (cnt != 0) {
+ /* We filled entire MTD, but did we reach EOF on input? */
+ if (full_read(STDIN_FILENO, filebuf, meminfo_writesize) != 0) {
+ /* no */
+ bb_error_msg_and_die("not enough space in MTD device");
+ }
+ }
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(filebuf);
+ close(fd);
+ }
+
+ return EXIT_SUCCESS;
+}