git-fetch: move more code into C.

diff --git a/read-cache.c b/read-cache.c
index b8d83ccd9f7985d60f69b7cd44db698d4e932612..c54a61187711087b98138b9598db6353457e4df3 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -793,16 +793,16 @@ int read_cache_from(const char *path)
                die("index file open failed (%s)", strerror(errno));
        }
 
-       cache_mmap = MAP_FAILED;
        if (!fstat(fd, &st)) {
                cache_mmap_size = st.st_size;
                errno = EINVAL;
                if (cache_mmap_size >= sizeof(struct cache_header) + 20)
-                       cache_mmap = mmap(NULL, cache_mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
-       }
+                       cache_mmap = xmmap(NULL, cache_mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
+               else
+                       die("index file smaller than expected");
+       } else
+               die("cannot stat the open index (%s)", strerror(errno));
        close(fd);
-       if (cache_mmap == MAP_FAILED)
-               die("index file mmap failed (%s)", strerror(errno));
 
        hdr = cache_mmap;
        if (verify_hdr(hdr, cache_mmap_size) < 0)
@@ -870,7 +870,7 @@ static int ce_write_flush(SHA_CTX *context, int fd)
        unsigned int buffered = write_buffer_len;
        if (buffered) {
                SHA1_Update(context, write_buffer, buffered);
-               if (write(fd, write_buffer, buffered) != buffered)
+               if (write_in_full(fd, write_buffer, buffered) != buffered)
                        return -1;
                write_buffer_len = 0;
        }
@@ -919,7 +919,7 @@ static int ce_flush(SHA_CTX *context, int fd)
 
        /* Flush first if not enough space for SHA1 signature */
        if (left + 20 > WRITE_BUFFER_SIZE) {
-               if (write(fd, write_buffer, left) != left)
+               if (write_in_full(fd, write_buffer, left) != left)
                        return -1;
                left = 0;
        }
@@ -927,7 +927,7 @@ static int ce_flush(SHA_CTX *context, int fd)
        /* Append the SHA1 signature at the end */
        SHA1_Final(write_buffer + left, context);
        left += 20;
-       return (write(fd, write_buffer, left) != left) ? -1 : 0;
+       return (write_in_full(fd, write_buffer, left) != left) ? -1 : 0;
 }
 
 static void ce_smudge_racily_clean_entry(struct cache_entry *ce)
@@ -1010,7 +1010,7 @@ int write_cache(int newfd, struct cache_entry **cache, int entries)
                if (data &&
                    !write_index_ext_header(&c, newfd, CACHE_EXT_TREE, sz) &&
                    !ce_write(&c, newfd, data, sz))
-                       ;
+                       free(data);
                else {
                        free(data);
                        return -1;