Nicer error messages in case saving an object to db goes wrong

Currently the error e.g. when pushing to a read-only repository is quite
confusing, this attempts to clean it up, unifies error reporting between
various object writers and uses error() on couple more places.

Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/sha1_file.c b/sha1_file.c
index 27eb14b92240b2f8b99ebf10bb4a6f8c00a02e5b..c9fdaa3d7e06f9d184e323142cc9c8d15a49aaf1 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1420,8 +1420,7 @@ int move_temp_to_file(const char *tmpfile, const char *filename)
        unlink(tmpfile);
        if (ret) {
                if (ret != EEXIST) {
-                       fprintf(stderr, "unable to write sha1 filename %s: %s\n", filename, strerror(ret));
-                       return -1;
+                       return error("unable to write sha1 filename %s: %s\n", filename, strerror(ret));
                }
                /* FIXME!!! Collision check here ? */
        }
@@ -1531,16 +1530,17 @@ int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned cha
        }
 
        if (errno != ENOENT) {
-               fprintf(stderr, "sha1 file %s: %s\n", filename, strerror(errno));
-               return -1;
+               return error("sha1 file %s: %s\n", filename, strerror(errno));
        }
 
        snprintf(tmpfile, sizeof(tmpfile), "%s/obj_XXXXXX", get_object_directory());
 
        fd = mkstemp(tmpfile);
        if (fd < 0) {
-               fprintf(stderr, "unable to create temporary sha1 filename %s: %s\n", tmpfile, strerror(errno));
-               return -1;
+               if (errno == EPERM)
+                       return error("insufficient permission for adding an object to repository database %s\n", get_object_directory());
+               else
+                       return error("unable to create temporary sha1 filename %s: %s\n", tmpfile, strerror(errno));
        }
 
        /* Set it up */
@@ -1655,9 +1655,12 @@ int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
        snprintf(tmpfile, sizeof(tmpfile), "%s/obj_XXXXXX", get_object_directory());
 
        local = mkstemp(tmpfile);
-       if (local < 0)
-               return error("Couldn't open %s for %s",
-                            tmpfile, sha1_to_hex(sha1));
+       if (local < 0) {
+               if (errno == EPERM)
+                       return error("insufficient permission for adding an object to repository database %s\n", get_object_directory());
+               else
+                       return error("unable to create temporary sha1 filename %s: %s\n", tmpfile, strerror(errno));
+       }
 
        memset(&stream, 0, sizeof(stream));