firmware-utils/trx: add relative offset parameter

[openwrt/svn-archive/archive.git] / tools / firmware-utils / src / trx.c

diff --git a/tools/firmware-utils/src/trx.c b/tools/firmware-utils/src/trx.c
index 5e5e77a492c077c669dbebd407e6701b21d41db0..44bd06a068c3e9d27a803bb3fd565b944ca16cb9 100644 (file)
--- a/tools/firmware-utils/src/trx.c
+++ b/tools/firmware-utils/src/trx.c
@@ -35,6 +35,12 @@
  * February 19, 2005 - mbm
  *
  * Add -a (align offset) and -b (absolute offset)
+ *
+ * March 24, 2010 - markus
+ *
+ * extend trx header struct for new version
+ * assume v1 for as default
+ * Add option -2 to allow v2 header
  */
 
 #include <stdio.h>
@@ -59,8 +65,7 @@ uint32_t crc32buf(char *buf, size_t len);
 /* from trxhdr.h */
 
 #define TRX_MAGIC      0x30524448      /* "HDR0" */
-#define TRX_VERSION    1
-#define TRX_MAX_LEN    0x5A0000
+#define TRX_MAX_LEN    0x720000
 #define TRX_NO_HEADER  1               /* Do not write TRX header */   
 
 struct trx_header {
@@ -68,7 +73,7 @@ struct trx_header {
        uint32_t len;                   /* Length of file including header */
        uint32_t crc32;                 /* 32-bit CRC from flag_version to end of file */
        uint32_t flag_version;  /* 0:15 flags, 16:31 version */
-       uint32_t offsets[3];    /* Offsets of partitions from start of header */
+       uint32_t offsets[4];    /* Offsets of partitions from start of header */
 };
 
 /**********************************************************************/
@@ -77,7 +82,9 @@ void usage(void) __attribute__ (( __noreturn__ ));
 
 void usage(void)
 {
-       fprintf(stderr, "Usage: trx [-o outfile] [-m maxlen] [-a align] [-b offset] [-f file] [-f file [-f file]]\n");
+       fprintf(stderr, "Usage:\n");
+       fprintf(stderr, " trx [-2] [-o outfile] [-m maxlen] [-a align] [-b absolute offset] [-x relative offset]\n");
+       fprintf(stderr, "     [-f file] [-f file [-f file [-f file (v2 only)]]]\n");
        exit(EXIT_FAILURE);
 }
 
@@ -90,9 +97,11 @@ int main(int argc, char **argv)
        char *e;
        int c, i, append = 0;
        size_t n;
+       ssize_t n2;
        uint32_t cur_len;
        unsigned long maxlen = TRX_MAX_LEN;
        struct trx_header *p;
+       char trx_version = 1;
 
        fprintf(stderr, "mjn3's trx replacement - v0.81.1\n");
 
@@ -104,14 +113,24 @@ int main(int argc, char **argv)
        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));
+       cur_len = sizeof(struct trx_header) - 4; /* assume v1 header */
+       p->flag_version = STORE32_LE((trx_version << 16));
 
        in = NULL;
        i = 0;
 
-       while ((c = getopt(argc, argv, "-:o:m:a:b:f:A:")) != -1) {
+       while ((c = getopt(argc, argv, "-:2o:m:a:x:b:f:A:")) != -1) {
                switch (c) {
+                       case '2':
+                               /* take care that nothing was written to buf so far */
+                               if (cur_len != sizeof(struct trx_header) - 4) {
+                                       fprintf(stderr, "-2 has to be used before any other argument!\n");
+                               }
+                               else {
+                                       trx_version = 2;
+                                       cur_len += 4;
+                               }
+                               break;
                        case 'A':
                                append = 1;
                                /* fall through */
@@ -200,6 +219,25 @@ int main(int argc, char **argv)
                                        memset(buf + cur_len, 0, n - cur_len);
                                        cur_len = n;
                                }
+                               break;
+                       case 'x':
+                               errno = 0;
+                               n2 = strtol(optarg, &e, 0);
+                               if (errno || (e == optarg) || *e) {
+                                       fprintf(stderr, "illegal numeric string\n");
+                                       usage();
+                               }
+                               if (n2 < 0) {
+                                       if (-n2 > cur_len) {
+                                               fprintf(stderr, "WARNING: current length smaller then -x %d offset\n",n2);
+                                               cur_len = 0;
+                                       } else
+                                               cur_len += n2;
+                               } else {
+                                       memset(buf + cur_len, 0, n2);
+                                       cur_len += n2;
+                               }
+
                                break;
                        default:
                                usage();