tools: padjffs2: add option to output padding data to stdout
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
This commit is contained in:
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31e5ed4152
commit
d06b68fe83
1 changed files with 16 additions and 4 deletions
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@ -15,6 +15,7 @@
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#include <stdlib.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string.h>
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#include <unistd.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/stat.h>
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@ -25,6 +26,7 @@ static unsigned char jffs2_pad_be[] = "\x19\x85\x20\x04\x04\x00\x00\x00\xc4\x94\
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static unsigned char jffs2_pad_le[] = "\x85\x19\x04\x20\x00\x00\x00\x04\xa8\xfb\xa0\xb4";
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static unsigned char jffs2_pad_le[] = "\x85\x19\x04\x20\x00\x00\x00\x04\xa8\xfb\xa0\xb4";
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static unsigned char *pad = eof_mark;
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static unsigned char *pad = eof_mark;
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static int pad_len = sizeof(eof_mark);
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static int pad_len = sizeof(eof_mark);
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static bool pad_to_stdout = false;
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#define ERR(fmt, ...) do { \
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#define ERR(fmt, ...) do { \
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fflush(0); \
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fflush(0); \
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@ -46,6 +48,7 @@ static int pad_image(char *name, uint32_t pad_mask)
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{
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{
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char *buf;
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char *buf;
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int fd;
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int fd;
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int outfd;
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ssize_t in_len;
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ssize_t in_len;
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ssize_t out_len;
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ssize_t out_len;
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int ret = -1;
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int ret = -1;
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@ -66,6 +69,11 @@ static int pad_image(char *name, uint32_t pad_mask)
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if (in_len < 0)
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if (in_len < 0)
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goto close;
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goto close;
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if (!pad_to_stdout)
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outfd = fd;
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else
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outfd = STDOUT_FILENO;
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memset(buf, '\xff', BUF_SIZE);
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memset(buf, '\xff', BUF_SIZE);
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in_len += xtra_offset;
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in_len += xtra_offset;
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@ -90,7 +98,7 @@ static int pad_image(char *name, uint32_t pad_mask)
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pad_mask &= ~mask;
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pad_mask &= ~mask;
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}
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}
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printf("padding image to %08x\n", (unsigned int) in_len - xtra_offset);
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fprintf(stderr, "padding image to %08x\n", (unsigned int) in_len - xtra_offset);
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while (out_len < in_len) {
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while (out_len < in_len) {
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ssize_t len;
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ssize_t len;
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@ -99,7 +107,7 @@ static int pad_image(char *name, uint32_t pad_mask)
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if (len > BUF_SIZE)
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if (len > BUF_SIZE)
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len = BUF_SIZE;
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len = BUF_SIZE;
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t = write(fd, buf, len);
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t = write(outfd, buf, len);
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if (t != len) {
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if (t != len) {
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ERRS("Unable to write to %s", name);
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ERRS("Unable to write to %s", name);
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goto close;
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goto close;
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@ -109,7 +117,7 @@ static int pad_image(char *name, uint32_t pad_mask)
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}
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}
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/* write out the JFFS end-of-filesystem marker */
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/* write out the JFFS end-of-filesystem marker */
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t = write(fd, pad, pad_len);
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t = write(outfd, pad, pad_len);
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if (t != pad_len) {
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if (t != pad_len) {
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ERRS("Unable to write to %s", name);
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ERRS("Unable to write to %s", name);
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goto close;
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goto close;
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@ -137,6 +145,7 @@ static int usage(void)
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" This is used to work around broken boot loaders that\n"
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" This is used to work around broken boot loaders that\n"
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" try to parse the entire firmware area as one big jffs2\n"
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" try to parse the entire firmware area as one big jffs2\n"
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" -j: (like -J, but little-endian instead of big-endian)\n"
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" -j: (like -J, but little-endian instead of big-endian)\n"
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" -c: write padding to stdout\n"
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"\n",
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"\n",
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progname);
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progname);
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return EXIT_FAILURE;
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return EXIT_FAILURE;
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@ -160,7 +169,7 @@ int main(int argc, char* argv[])
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argc--;
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argc--;
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pad_mask = 0;
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pad_mask = 0;
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while ((ch = getopt(argc, argv, "x:Jj")) != -1) {
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while ((ch = getopt(argc, argv, "x:Jjc")) != -1) {
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switch (ch) {
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switch (ch) {
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case 'x':
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case 'x':
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xtra_offset = strtoul(optarg, NULL, 0);
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xtra_offset = strtoul(optarg, NULL, 0);
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@ -175,6 +184,9 @@ int main(int argc, char* argv[])
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pad = jffs2_pad_le;
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pad = jffs2_pad_le;
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pad_len = sizeof(jffs2_pad_le) - 1;
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pad_len = sizeof(jffs2_pad_le) - 1;
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break;
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break;
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case 'c':
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pad_to_stdout = true;
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break;
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default:
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default:
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return usage();
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return usage();
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}
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}
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