busybox/miscutils/nandwrite.c
Denys Vlasenko 036585a911 getopt32: remove applet_long_options
FEATURE_GETOPT_LONG made dependent on LONG_OPTS.

The folloving options are removed, now LONG_OPTS enables long options
for affected applets:
FEATURE_ENV_LONG_OPTIONS	FEATURE_EXPAND_LONG_OPTIONS
FEATURE_UNEXPAND_LONG_OPTIONS	FEATURE_MKDIR_LONG_OPTIONS
FEATURE_MV_LONG_OPTIONS		FEATURE_RMDIR_LONG_OPTIONS
FEATURE_ADDGROUP_LONG_OPTIONS	FEATURE_ADDUSER_LONG_OPTIONS
FEATURE_HWCLOCK_LONG_OPTIONS	FEATURE_NSENTER_LONG_OPTS
FEATURE_CHCON_LONG_OPTIONS	FEATURE_RUNCON_LONG_OPTIONS

They either had a small number of long options, or their long options are
essential.

Example: upstream addgroup and adduser have ONLY longopts,
we should probably go further and get rid
of non-standard short options.

To this end, make addgroup and adduser "select LONG_OPTS".
We had this breakage caused by us even in our own package!
	#if ENABLE_LONG_OPTS || !ENABLE_ADDGROUP
                /* We try to use --gid, not -g, because "standard" addgroup
                 * has no short option -g, it has only long --gid.
                 */
                argv[1] = (char*)"--gid";
	#else
                /* Breaks if system in fact does NOT use busybox addgroup */
                argv[1] = (char*)"-g";
	#endif

xargs: its lone longopt no longer depends on DESKTOP, only on LONG_OPTS.

hwclock TODO: get rid of incompatible -t, -l aliases to --systz, --localtime

Shorten help texts by omitting long option when short opt alternative exists.

Reduction of size comes from the fact that store of an immediate
(an address of longopts) to a fixed address (global variable)
is a longer insn than pushing that immediate or passing it in a register.
This effect is CPU-agnostic.

function                                             old     new   delta
getopt32                                            1350      22   -1328
vgetopt32                                              -    1318   +1318
getopt32long                                           -      24     +24
tftpd_main                                           562     567      +5
scan_recursive                                       376     380      +4
collect_cpu                                          545     546      +1
date_main                                           1096    1095      -1
hostname_main                                        262     259      -3
uname_main                                           259     255      -4
setpriv_main                                         362     358      -4
rmdir_main                                           191     187      -4
mv_main                                              562     558      -4
ipcalc_main                                          548     544      -4
ifenslave_main                                       641     637      -4
gzip_main                                            192     188      -4
gunzip_main                                           77      73      -4
fsfreeze_main                                         81      77      -4
flock_main                                           318     314      -4
deluser_main                                         337     333      -4
cp_main                                              374     370      -4
chown_main                                           175     171      -4
applet_long_options                                    4       -      -4
xargs_main                                           894     889      -5
wget_main                                           2540    2535      -5
udhcpc_main                                         2767    2762      -5
touch_main                                           436     431      -5
tar_main                                            1014    1009      -5
start_stop_daemon_main                              1033    1028      -5
sed_main                                             682     677      -5
script_main                                         1082    1077      -5
run_parts_main                                       330     325      -5
rtcwake_main                                         459     454      -5
od_main                                             2169    2164      -5
nl_main                                              201     196      -5
modprobe_main                                        773     768      -5
mkdir_main                                           160     155      -5
ls_main                                              568     563      -5
install_main                                         773     768      -5
hwclock_main                                         411     406      -5
getopt_main                                          622     617      -5
fstrim_main                                          256     251      -5
env_main                                             198     193      -5
dumpleases_main                                      635     630      -5
dpkg_main                                           3991    3986      -5
diff_main                                           1355    1350      -5
cryptpw_main                                         233     228      -5
cpio_main                                            593     588      -5
conspy_main                                         1135    1130      -5
chpasswd_main                                        313     308      -5
adduser_main                                         887     882      -5
addgroup_main                                        416     411      -5
ftpgetput_main                                       351     345      -6
get_terminal_width_height                            242     234      -8
expand_main                                          690     680     -10
static.expand_longopts                                18       -     -18
static.unexpand_longopts                              27       -     -27
mkdir_longopts                                        28       -     -28
env_longopts                                          30       -     -30
static.ifenslave_longopts                             34       -     -34
mv_longopts                                           46       -     -46
static.rmdir_longopts                                 48       -     -48
packed_usage                                       31739   31687     -52
------------------------------------------------------------------------------
(add/remove: 2/8 grow/shrink: 3/49 up/down: 1352/-1840)      Total: -488 bytes
   text	   data	    bss	    dec	    hex	filename
 915681	    485	   6880	 923046	  e15a6	busybox_old
 915428	    485	   6876	 922789	  e14a5	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-08 17:09:40 +02:00

280 lines
8.0 KiB
C

/*
* nandwrite and nanddump 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
*/
//config:config NANDWRITE
//config: bool "nandwrite (5.9 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
//config: Write to the specified MTD device, with bad blocks awareness
//config:
//config:config NANDDUMP
//config: bool "nanddump (6.3 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
//config: Dump the content of raw NAND chip
//applet:IF_NANDWRITE(APPLET(nandwrite, BB_DIR_USR_SBIN, BB_SUID_DROP))
//applet:IF_NANDDUMP(APPLET_ODDNAME(nanddump, nandwrite, BB_DIR_USR_SBIN, BB_SUID_DROP, nanddump))
//kbuild:lib-$(CONFIG_NANDWRITE) += nandwrite.o
//kbuild:lib-$(CONFIG_NANDDUMP) += nandwrite.o
//usage:#define nandwrite_trivial_usage
//usage: "[-np] [-s ADDR] MTD_DEVICE [FILE]"
//usage:#define nandwrite_full_usage "\n\n"
//usage: "Write to MTD_DEVICE\n"
//usage: "\n -n Write without ecc"
//usage: "\n -p Pad to page size"
//usage: "\n -s ADDR Start address"
//usage:#define nanddump_trivial_usage
//usage: "[-no]" IF_LONG_OPTS(" [--bb padbad|skipbad]") " [-s ADDR] [-l LEN] [-f FILE] MTD_DEVICE"
//usage:#define nanddump_full_usage "\n\n"
//usage: "Dump MTD_DEVICE\n"
//usage: "\n -n Read without ecc"
//usage: "\n -o Dump oob data"
//usage: "\n -s ADDR Start address"
//usage: "\n -l LEN Length"
//usage: "\n -f FILE Dump to file ('-' for stdout)"
//usage: IF_LONG_OPTS(
//usage: "\n --bb METHOD"
//usage: "\n skipbad: skip bad blocks"
//usage: "\n padbad: substitute bad blocks by 0xff (default)"
//usage: )
#include "libbb.h"
#include <mtd/mtd-user.h>
#define IS_NANDDUMP (ENABLE_NANDDUMP && (!ENABLE_NANDWRITE || (applet_name[4] == 'd')))
#define IS_NANDWRITE (ENABLE_NANDWRITE && (!ENABLE_NANDDUMP || (applet_name[4] != 'd')))
#define OPT_p (1 << 0) /* nandwrite only */
#define OPT_o (1 << 0) /* nanddump only */
#define OPT_n (1 << 1)
#define OPT_s (1 << 2)
#define OPT_f (1 << 3)
#define OPT_l (1 << 4)
#define OPT_bb (1 << 5) /* must be the last one in the list */
#define BB_PADBAD (1 << 0)
#define BB_SKIPBAD (1 << 1)
/* helper for writing out 0xff for bad blocks pad */
static void dump_bad(struct mtd_info_user *meminfo, unsigned len, int oob)
{
unsigned char buf[meminfo->writesize];
unsigned count;
/* round len to the next page only if len is not already on a page */
len = ((len - 1) | (meminfo->writesize - 1)) + 1;
memset(buf, 0xff, sizeof(buf));
for (count = 0; count < len; count += meminfo->writesize) {
xwrite(STDOUT_FILENO, buf, meminfo->writesize);
if (oob)
xwrite(STDOUT_FILENO, buf, meminfo->oobsize);
}
}
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) {
if (IS_NANDWRITE)
bb_error_msg_and_die("not enough space in MTD device");
return block_offset; /* let the caller exit */
}
offs = block_offset;
if (xioctl(fd, MEMGETBADBLOCK, &offs) == 0)
return block_offset;
/* ioctl returned 1 => "bad block" */
if (IS_NANDWRITE)
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)
{
/* Buffer for OOB data */
unsigned char *oobbuf;
unsigned opts;
unsigned bb_method = BB_SKIPBAD;
int fd;
ssize_t cnt;
unsigned mtdoffset, meminfo_writesize, blockstart, limit;
unsigned end_addr = ~0;
struct mtd_info_user meminfo;
struct mtd_oob_buf oob;
unsigned char *filebuf;
const char *opt_s = "0", *opt_f = "-", *opt_l, *opt_bb;
if (IS_NANDDUMP) {
opt_complementary = "=1";
opts = getopt32long(argv, "ons:f:l:",
"bb\0" Required_argument "\xff", /* no short equivalent */
&opt_s, &opt_f, &opt_l, &opt_bb);
} else { /* nandwrite */
opt_complementary = "-1:?2";
opts = getopt32(argv, "pns:", &opt_s);
}
argv += optind;
if (IS_NANDWRITE && argv[1])
opt_f = argv[1];
if (!LONE_DASH(opt_f)) {
int tmp_fd = xopen(opt_f,
IS_NANDDUMP ? O_WRONLY | O_TRUNC | O_CREAT : O_RDONLY
);
xmove_fd(tmp_fd, IS_NANDDUMP ? STDOUT_FILENO : STDIN_FILENO);
}
fd = xopen(argv[0], IS_NANDWRITE ? O_RDWR : O_RDONLY);
xioctl(fd, MEMGETINFO, &meminfo);
if (opts & OPT_n)
xioctl(fd, MTDFILEMODE, (void *)MTD_FILE_MODE_RAW);
mtdoffset = xstrtou(opt_s, 0);
if (IS_NANDDUMP && (opts & OPT_l)) {
unsigned length = xstrtou(opt_l, 0);
if (length < meminfo.size - mtdoffset)
end_addr = mtdoffset + length;
}
if (IS_NANDDUMP && (opts & OPT_bb)) {
if (strcmp("skipbad", opt_bb) == 0)
bb_method = BB_SKIPBAD;
else if (strcmp("padbad", opt_bb) == 0)
bb_method = BB_PADBAD;
else
bb_show_usage();
}
/* 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);
oobbuf = xmalloc(meminfo.oobsize);
oob.start = 0;
oob.length = meminfo.oobsize;
oob.ptr = oobbuf;
blockstart = mtdoffset & ~(meminfo.erasesize - 1);
if (blockstart != mtdoffset) {
unsigned tmp;
/* mtdoffset is in the middle of an erase block, verify that
* this block is OK. Advance mtdoffset only if this block is
* bad.
*/
tmp = next_good_eraseblock(fd, &meminfo, blockstart);
if (tmp != blockstart) {
/* bad block(s), advance mtdoffset */
if (IS_NANDDUMP) {
if (bb_method == BB_PADBAD) {
int bad_len = MIN(tmp, end_addr) - mtdoffset;
dump_bad(&meminfo, bad_len, opts & OPT_o);
}
/* with option skipbad, increase the total length */
if (bb_method == BB_SKIPBAD) {
end_addr += (tmp - blockstart);
}
}
mtdoffset = tmp;
}
}
cnt = -1;
limit = MIN(meminfo.size, end_addr);
while (mtdoffset < limit) {
int input_fd = IS_NANDWRITE ? STDIN_FILENO : fd;
int output_fd = IS_NANDWRITE ? fd : STDOUT_FILENO;
blockstart = mtdoffset & ~(meminfo.erasesize - 1);
if (blockstart == mtdoffset) {
/* starting a new eraseblock */
mtdoffset = next_good_eraseblock(fd, &meminfo, blockstart);
if (IS_NANDWRITE)
printf("Writing at 0x%08x\n", mtdoffset);
else if (mtdoffset > blockstart) {
if (bb_method == BB_PADBAD) {
/* dump FF padded bad block */
int bad_len = MIN(mtdoffset, limit) - blockstart;
dump_bad(&meminfo, bad_len, opts & OPT_o);
} else if (bb_method == BB_SKIPBAD) {
/* for skipbad, increase the length */
if ((end_addr + mtdoffset - blockstart) > end_addr)
end_addr += (mtdoffset - blockstart);
else
end_addr = ~0;
limit = MIN(meminfo.size, end_addr);
}
}
if (mtdoffset >= limit)
break;
}
xlseek(fd, mtdoffset, SEEK_SET);
/* get some more data from input */
cnt = full_read(input_fd, 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 (IS_NANDDUMP)
bb_error_msg_and_die("short read");
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);
}
xwrite(output_fd, filebuf, meminfo_writesize);
if (IS_NANDDUMP && (opts & OPT_o)) {
/* Dump OOB data */
oob.start = mtdoffset;
xioctl(fd, MEMREADOOB, &oob);
xwrite(output_fd, oobbuf, meminfo.oobsize);
}
mtdoffset += meminfo_writesize;
if (cnt < meminfo_writesize)
break;
}
if (IS_NANDWRITE && 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;
}