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-rw-r--r--applypatch/main.c147
1 files changed, 141 insertions, 6 deletions
diff --git a/applypatch/main.c b/applypatch/main.c
index e08f5c1eb..3917f86ed 100644
--- a/applypatch/main.c
+++ b/applypatch/main.c
@@ -15,8 +15,126 @@
*/
#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
-extern int applypatch(int argc, char** argv);
+#include "applypatch.h"
+#include "edify/expr.h"
+#include "mincrypt/sha.h"
+
+int CheckMode(int argc, char** argv) {
+ if (argc < 3) {
+ return 2;
+ }
+ return applypatch_check(argv[2], argc-3, argv+3);
+}
+
+int SpaceMode(int argc, char** argv) {
+ if (argc != 3) {
+ return 2;
+ }
+ char* endptr;
+ size_t bytes = strtol(argv[2], &endptr, 10);
+ if (bytes == 0 && endptr == argv[2]) {
+ printf("can't parse \"%s\" as byte count\n\n", argv[2]);
+ return 1;
+ }
+ return CacheSizeCheck(bytes);
+}
+
+// Parse arguments (which should be of the form "<sha1>" or
+// "<sha1>:<filename>" into the new parallel arrays *sha1s and
+// *patches (loading file contents into the patches). Returns 0 on
+// success.
+static int ParsePatchArgs(int argc, char** argv,
+ char*** sha1s, Value*** patches, int* num_patches) {
+ *num_patches = argc;
+ *sha1s = malloc(*num_patches * sizeof(char*));
+ *patches = malloc(*num_patches * sizeof(Value*));
+ memset(*patches, 0, *num_patches * sizeof(Value*));
+
+ uint8_t digest[SHA_DIGEST_SIZE];
+
+ int i;
+ for (i = 0; i < *num_patches; ++i) {
+ char* colon = strchr(argv[i], ':');
+ if (colon != NULL) {
+ *colon = '\0';
+ ++colon;
+ }
+
+ if (ParseSha1(argv[i], digest) != 0) {
+ printf("failed to parse sha1 \"%s\"\n", argv[i]);
+ return -1;
+ }
+
+ (*sha1s)[i] = argv[i];
+ if (colon == NULL) {
+ (*patches)[i] = NULL;
+ } else {
+ FileContents fc;
+ if (LoadFileContents(colon, &fc) != 0) {
+ goto abort;
+ }
+ (*patches)[i] = malloc(sizeof(Value));
+ (*patches)[i]->type = VAL_BLOB;
+ (*patches)[i]->size = fc.size;
+ (*patches)[i]->data = (char*)fc.data;
+ }
+ }
+
+ return 0;
+
+ abort:
+ for (i = 0; i < *num_patches; ++i) {
+ Value* p = (*patches)[i];
+ if (p != NULL) {
+ free(p->data);
+ free(p);
+ }
+ }
+ free(*sha1s);
+ free(*patches);
+ return -1;
+}
+
+int PatchMode(int argc, char** argv) {
+ if (argc < 6) {
+ return 2;
+ }
+
+ char* endptr;
+ size_t target_size = strtol(argv[4], &endptr, 10);
+ if (target_size == 0 && endptr == argv[4]) {
+ printf("can't parse \"%s\" as byte count\n\n", argv[4]);
+ return 1;
+ }
+
+ char** sha1s;
+ Value** patches;
+ int num_patches;
+ if (ParsePatchArgs(argc-5, argv+5, &sha1s, &patches, &num_patches) != 0) {
+ printf("failed to parse patch args\n");
+ return 1;
+ }
+
+ int result = applypatch(argv[1], argv[2], argv[3], target_size,
+ num_patches, sha1s, patches);
+
+ int i;
+ for (i = 0; i < num_patches; ++i) {
+ Value* p = patches[i];
+ if (p != NULL) {
+ free(p->data);
+ free(p);
+ }
+ }
+ free(sha1s);
+ free(patches);
+
+ return result;
+}
// This program applies binary patches to files in a way that is safe
// (the original file is not touched until we have the desired
@@ -42,9 +160,9 @@ extern int applypatch(int argc, char** argv);
// LoadMTDContents() function above for the format of such a filename.
int main(int argc, char** argv) {
- int result = applypatch(argc, argv);
- if (result == 2) {
- printf(
+ if (argc < 2) {
+ usage:
+ printf(
"usage: %s <src-file> <tgt-file> <tgt-sha1> <tgt-size> "
"[<src-sha1>:<patch> ...]\n"
" or %s -c <file> [<sha1> ...]\n"
@@ -55,6 +173,23 @@ int main(int argc, char** argv) {
" MTD:<partition>:<len_1>:<sha1_1>:<len_2>:<sha1_2>:...\n"
"to specify reading from or writing to an MTD partition.\n\n",
argv[0], argv[0], argv[0], argv[0]);
- }
- return result;
+ return 2;
+ }
+
+ int result;
+
+ if (strncmp(argv[1], "-l", 3) == 0) {
+ result = ShowLicenses();
+ } else if (strncmp(argv[1], "-c", 3) == 0) {
+ result = CheckMode(argc, argv);
+ } else if (strncmp(argv[1], "-s", 3) == 0) {
+ result = SpaceMode(argc, argv);
+ } else {
+ result = PatchMode(argc, argv);
+ }
+
+ if (result == 2) {
+ goto usage;
+ }
+ return result;
}