mailsplit: allow empty input from stdin

[git.git] / sha1_file.c

diff --git a/sha1_file.c b/sha1_file.c
index 111a71d..6b7577d 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -81,6 +81,8 @@ char * sha1_to_hex(const unsigned char *sha1)
                *buf++ = hex[val >> 4];
                *buf++ = hex[val & 0xf];
        }
+       *buf = '\0';
+
        return buffer;
 }
 
@@ -319,12 +321,16 @@ struct packed_git *packed_git;
 static int check_packed_git_idx(const char *path, unsigned long *idx_size_,
                                void **idx_map_)
 {
+       SHA_CTX ctx;
+       unsigned char sha1[20];
        void *idx_map;
        unsigned int *index;
        unsigned long idx_size;
        int nr, i;
-       int fd = open(path, O_RDONLY);
+       int fd;
        struct stat st;
+
+       fd = open(path, O_RDONLY);
        if (fd < 0)
                return -1;
        if (fstat(fd, &st)) {
@@ -362,6 +368,16 @@ static int check_packed_git_idx(const char *path, unsigned long *idx_size_,
        if (idx_size != 4*256 + nr * 24 + 20 + 20)
                return error("wrong index file size");
 
+       /*
+        * File checksum.
+        */
+       SHA1_Init(&ctx);
+       SHA1_Update(&ctx, idx_map, idx_size-20);
+       SHA1_Final(sha1, &ctx);
+
+       if (memcmp(sha1, idx_map + idx_size - 20, 20))
+               return error("index checksum mismatch");
+
        return 0;
 }
 
@@ -464,7 +480,7 @@ struct packed_git *add_packed_git(char *path, int path_len, int local)
        p->pack_last_used = 0;
        p->pack_use_cnt = 0;
        p->pack_local = local;
-       if (!get_sha1_hex(path + path_len - 40 - 4, sha1))
+       if ((path_len > 44) && !get_sha1_hex(path + path_len - 44, sha1))
                memcpy(p->sha1, sha1, 20);
        return p;
 }
@@ -1274,7 +1290,7 @@ int move_temp_to_file(const char *tmpfile, char *filename)
        unlink(tmpfile);
        if (ret) {
                if (ret != EEXIST) {
-                       fprintf(stderr, "unable to write sha1 filename %s: %s", filename, strerror(ret));
+                       fprintf(stderr, "unable to write sha1 filename %s: %s\n", filename, strerror(ret));
                        return -1;
                }
                /* FIXME!!! Collision check here ? */
@@ -1313,7 +1329,7 @@ int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned cha
        }
 
        if (errno != ENOENT) {
-               fprintf(stderr, "sha1 file %s: %s", filename, strerror(errno));
+               fprintf(stderr, "sha1 file %s: %s\n", filename, strerror(errno));
                return -1;
        }
 
@@ -1321,7 +1337,7 @@ int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned cha
 
        fd = mkstemp(tmpfile);
        if (fd < 0) {
-               fprintf(stderr, "unable to create temporary sha1 filename %s: %s", tmpfile, strerror(errno));
+               fprintf(stderr, "unable to create temporary sha1 filename %s: %s\n", tmpfile, strerror(errno));
                return -1;
        }
 
@@ -1410,7 +1426,7 @@ int write_sha1_to_fd(int fd, const unsigned char *sha1)
                size = write(fd, buf + posn, objsize - posn);
                if (size <= 0) {
                        if (!size) {
-                               fprintf(stderr, "write closed");
+                               fprintf(stderr, "write closed\n");
                        } else {
                                perror("write ");
                        }
@@ -1528,6 +1544,40 @@ int has_sha1_file(const unsigned char *sha1)
        return find_sha1_file(sha1, &st) ? 1 : 0;
 }
 
+int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
+{
+       unsigned long size = 4096;
+       char *buf = malloc(size);
+       int iret, ret;
+       unsigned long off = 0;
+       unsigned char hdr[50];
+       int hdrlen;
+       do {
+               iret = read(fd, buf + off, size - off);
+               if (iret > 0) {
+                       off += iret;
+                       if (off == size) {
+                               size *= 2;
+                               buf = realloc(buf, size);
+                       }
+               }
+       } while (iret > 0);
+       if (iret < 0) {
+               free(buf);
+               return -1;
+       }
+       if (!type)
+               type = "blob";
+       if (write_object)
+               ret = write_sha1_file(buf, off, type, sha1);
+       else {
+               write_sha1_file_prepare(buf, off, type, sha1, hdr, &hdrlen);
+               ret = 0;
+       }
+       free(buf);
+       return ret;
+}
+
 int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type)
 {
        unsigned long size = st->st_size;