Fix signature of fcntl() compatibility dummy

diff --git a/sha1_file.c b/sha1_file.c
index 9196b5783da5eb82f9ef7809c9439a9c7e0d797f..006321e009b321db6cf4f7bf35d8385017a7076a 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2283,6 +2283,8 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
        int fd, ret;
        unsigned char compressed[4096];
        z_stream stream;
+       git_SHA_CTX c;
+       unsigned char parano_sha1[20];
        char *filename;
        static char tmpfile[PATH_MAX];
 
@@ -2302,18 +2304,22 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
        deflateInit(&stream, zlib_compression_level);
        stream.next_out = compressed;
        stream.avail_out = sizeof(compressed);
+       git_SHA1_Init(&c);
 
        /* First header.. */
        stream.next_in = (unsigned char *)hdr;
        stream.avail_in = hdrlen;
        while (deflate(&stream, 0) == Z_OK)
                /* nothing */;
+       git_SHA1_Update(&c, hdr, hdrlen);
 
        /* Then the data itself.. */
        stream.next_in = buf;
        stream.avail_in = len;
        do {
+               unsigned char *in0 = stream.next_in;
                ret = deflate(&stream, Z_FINISH);
+               git_SHA1_Update(&c, in0, stream.next_in - in0);
                if (write_buffer(fd, compressed, stream.next_out - compressed) < 0)
                        die("unable to write sha1 file");
                stream.next_out = compressed;
@@ -2325,6 +2331,9 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
        ret = deflateEnd(&stream);
        if (ret != Z_OK)
                die("deflateEnd on object %s failed (%d)", sha1_to_hex(sha1), ret);
+       git_SHA1_Final(parano_sha1, &c);
+       if (hashcmp(sha1, parano_sha1) != 0)
+               die("confused by unstable object source data for %s", sha1_to_hex(sha1));
 
        close_sha1_file(fd);
 
@@ -2430,6 +2439,8 @@ static int index_mem(unsigned char *sha1, void *buf, size_t size,
        return ret;
 }
 
+#define SMALL_FILE_SIZE (32*1024)
+
 int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object,
             enum object_type type, const char *path)
 {
@@ -2444,6 +2455,14 @@ int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object,
                else
                        ret = -1;
                strbuf_release(&sbuf);
+       } else if (size <= SMALL_FILE_SIZE) {
+               char *buf = xmalloc(size);
+               if (size == read_in_full(fd, buf, size))
+                       ret = index_mem(sha1, buf, size, write_object, type,
+                                       path);
+               else
+                       ret = error("short read %s", strerror(errno));
+               free(buf);
        } else if (size) {
                void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
                ret = index_mem(sha1, buf, size, write_object, type, path);