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add -a and -b options needed for jffs2 root

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@275 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
mbm 2005-02-20 04:05:27 +00:00
parent 9004fa4f9f
commit 8cf9356a03
1 changed files with 74 additions and 64 deletions
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138
package/openwrt/trx.c
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@ -31,6 +31,10 @@
* Sigh... Make it endian-neutral.
*
* TODO: Support '-b' option to specify offsets for each file.
*
* February 19, 2005 - mbm
*
* Add -a (align offset) and -b (absolute offset)
*/
#include <stdio.h>
@ -75,7 +79,7 @@ void usage(void) __attribute__ (( __noreturn__ ));
void usage(void)
{
fprintf(stderr, "Usage: trx [-o outfile] [-m maxlen] file [file [file]]\n");
fprintf(stderr, "Usage: trx [-o outfile] [-m maxlen] [-a align] [-b offset] file [file [file]]\n");
exit(EXIT_FAILURE);
}
@ -92,12 +96,54 @@ int main(int argc, char **argv)
unsigned long maxlen = TRX_MAX_LEN;
struct trx_header *p;
fprintf(stderr, "mjn3's trx replacement - v0.81\n");
fprintf(stderr, "mjn3's trx replacement - v0.81.1\n");
while ((c = getopt(argc, argv, "o:m:")) != -1) {
if (!(buf = malloc(maxlen))) {
fprintf(stderr, "malloc failed\n");
return EXIT_FAILURE;
}
p = (struct trx_header *) buf;
p->magic = STORE32_LE(TRX_MAGIC);
cur_len = sizeof(struct trx_header);
p->flag_version = STORE32_LE((TRX_VERSION << 16));
in = NULL;
i = 0;
while ((c = getopt(argc, argv, "-:o:m:a:b:")) != -1) {
switch (c) {
case 1:
p->offsets[i++] = STORE32_LE(cur_len);
if (!(in = fopen(optarg, "r"))) {
fprintf(stderr, "can not open \"%s\" for reading\n", optarg);
usage();
}
n = fread(buf + cur_len, 1, maxlen - cur_len, in);
if (!feof(in)) {
fprintf(stderr, "fread failure or file \"%s\" too large\n",optarg);
fclose(in);
return EXIT_FAILURE;
}
fclose(in);
#undef ROUND
#define ROUND 4
if (n & (ROUND-1)) {
memset(buf + cur_len + n, 0, ROUND - (n & (ROUND-1)));
n += ROUND - (n & (ROUND-1));
}
cur_len += n;
break;
case 'o':
ofn = optarg;
if (ofn && !(out = fopen(ofn, "w"))) {
fprintf(stderr, "can not open \"%s\" for writing\n", ofn);
usage();
}
break;
case 'm':
errno = 0;
@ -115,76 +161,40 @@ int main(int argc, char **argv)
fprintf(stderr, "maxlen too small (or wrapped)\n");
usage();
}
if (maxlen > TRX_MAX_LEN) {
fprintf(stderr, "WARNING: maxlen exceeds default maximum! Beware of overwriting nvram!\n");
}
if (!(buf = realloc(buf,maxlen))) {
fprintf(stderr, "realloc failed");
return EXIT_FAILURE;
}
break;
case 'a':
n = atoi(optarg);
if (cur_len & (n-1)) {
n = n - (cur_len & (n-1));
memset(buf + cur_len, 0, n);
cur_len += n;
}
break;
case 'b':
n = atoi(optarg);
if (n < cur_len) {
fprintf(stderr, "WARNING: current length exceeds -b %d offset",n);
} else {
memset(buf + cur_len, 0, n - cur_len);
cur_len = n;
}
default:
usage();
}
}
if (ofn && !(out = fopen(ofn, "w"))) {
fprintf(stderr, "can not open \"%s\" for writing\n", ofn);
if (!in) {
fprintf(stderr, "we require atleast one filename\n");
usage();
}
if (optind == argc) {
fprintf(stderr, "we require at least one arg\n");
usage();
}
if (argc - optind > 3) {
fprintf(stderr, "too many args: %d > 3\n", argc - optind);
usage();
}
if (maxlen > TRX_MAX_LEN) {
fprintf(stderr, "WARNING: maxlen exceeds default maximum! Beware of overwriting nvram!\n");
}
if (!(buf = malloc(maxlen))) {
fprintf(stderr, "malloc failed\n");
return EXIT_FAILURE;
}
p = (struct trx_header *) buf;
p->magic = STORE32_LE(TRX_MAGIC);
cur_len = sizeof(struct trx_header);
p->flag_version = STORE32_LE((TRX_VERSION << 16));
i = 0;
while (optind < argc) {
p->offsets[i++] = STORE32_LE(cur_len);
if (!(in = fopen(argv[optind], "r"))) {
fprintf(stderr, "can not open \"%s\" for reading\n", argv[optind]);
usage();
}
n = fread(buf + cur_len, 1, maxlen - cur_len, in);
if (!feof(in)) {
fprintf(stderr, "fread failure or file \"%s\" too large\n",
argv[optind]);
fclose(in);
return EXIT_FAILURE;
}
fclose(in);
++optind;
if (optind < argc) {
#undef ROUND
#define ROUND 4
if (n & (ROUND-1)) {
memset(buf + cur_len + n, 0, ROUND - (n & (ROUND-1)));
n += ROUND - (n & (ROUND-1));
}
}
cur_len += n;
}
#undef ROUND
#define ROUND 0x1000
n = cur_len & (ROUND-1);