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authorYousong Zhou <yszhou4tech@gmail.com>2016-07-09 20:15:57 +0800
committerJo-Philipp Wich <jo@mein.io>2016-07-11 13:26:33 +0200
commitd06b68fe83ebb969baa64335779045d80bc41f89 (patch)
tree42d0c2dbe3c2c9e0962fc1b044713935a4efbeb1 /tools/padjffs2/src/padjffs2.c
parent31e5ed4152c4aa826641b2db6b4245a03dd553b5 (diff)
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tools: padjffs2: add option to output padding data to stdout
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Diffstat (limited to 'tools/padjffs2/src/padjffs2.c')
-rw-r--r--tools/padjffs2/src/padjffs2.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/tools/padjffs2/src/padjffs2.c b/tools/padjffs2/src/padjffs2.c
index 59c7625dc4..6308292431 100644
--- a/tools/padjffs2/src/padjffs2.c
+++ b/tools/padjffs2/src/padjffs2.c
@@ -15,6 +15,7 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <stdbool.h>
#include <sys/types.h>
#include <sys/stat.h>
@@ -25,6 +26,7 @@ static unsigned char jffs2_pad_be[] = "\x19\x85\x20\x04\x04\x00\x00\x00\xc4\x94\
static unsigned char jffs2_pad_le[] = "\x85\x19\x04\x20\x00\x00\x00\x04\xa8\xfb\xa0\xb4";
static unsigned char *pad = eof_mark;
static int pad_len = sizeof(eof_mark);
+static bool pad_to_stdout = false;
#define ERR(fmt, ...) do { \
fflush(0); \
@@ -46,6 +48,7 @@ static int pad_image(char *name, uint32_t pad_mask)
{
char *buf;
int fd;
+ int outfd;
ssize_t in_len;
ssize_t out_len;
int ret = -1;
@@ -66,6 +69,11 @@ static int pad_image(char *name, uint32_t pad_mask)
if (in_len < 0)
goto close;
+ if (!pad_to_stdout)
+ outfd = fd;
+ else
+ outfd = STDOUT_FILENO;
+
memset(buf, '\xff', BUF_SIZE);
in_len += xtra_offset;
@@ -90,7 +98,7 @@ static int pad_image(char *name, uint32_t pad_mask)
pad_mask &= ~mask;
}
- printf("padding image to %08x\n", (unsigned int) in_len - xtra_offset);
+ fprintf(stderr, "padding image to %08x\n", (unsigned int) in_len - xtra_offset);
while (out_len < in_len) {
ssize_t len;
@@ -99,7 +107,7 @@ static int pad_image(char *name, uint32_t pad_mask)
if (len > BUF_SIZE)
len = BUF_SIZE;
- t = write(fd, buf, len);
+ t = write(outfd, buf, len);
if (t != len) {
ERRS("Unable to write to %s", name);
goto close;
@@ -109,7 +117,7 @@ static int pad_image(char *name, uint32_t pad_mask)
}
/* write out the JFFS end-of-filesystem marker */
- t = write(fd, pad, pad_len);
+ t = write(outfd, pad, pad_len);
if (t != pad_len) {
ERRS("Unable to write to %s", name);
goto close;
@@ -137,6 +145,7 @@ static int usage(void)
" This is used to work around broken boot loaders that\n"
" try to parse the entire firmware area as one big jffs2\n"
" -j: (like -J, but little-endian instead of big-endian)\n"
+ " -c: write padding to stdout\n"
"\n",
progname);
return EXIT_FAILURE;
@@ -160,7 +169,7 @@ int main(int argc, char* argv[])
argc--;
pad_mask = 0;
- while ((ch = getopt(argc, argv, "x:Jj")) != -1) {
+ while ((ch = getopt(argc, argv, "x:Jjc")) != -1) {
switch (ch) {
case 'x':
xtra_offset = strtoul(optarg, NULL, 0);
@@ -175,6 +184,9 @@ int main(int argc, char* argv[])
pad = jffs2_pad_le;
pad_len = sizeof(jffs2_pad_le) - 1;
break;
+ case 'c':
+ pad_to_stdout = true;
+ break;
default:
return usage();
}