From a1cdc251728b4a2553e38a5427851b14643c7649 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Wed, 26 Jan 2011 12:46:55 -0800 Subject: fsck: drop unused parameter from traverse_one_object() Also add comments to seemingly unsafe pointer dereferences, that are all safe. Signed-off-by: Junio C Hamano --- builtin/fsck.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/builtin/fsck.c b/builtin/fsck.c index 6d5ebca7a..91409a006 100644 --- a/builtin/fsck.c +++ b/builtin/fsck.c @@ -74,7 +74,13 @@ static int mark_object(struct object *obj, int type, void *data) { struct object *parent = data; + /* + * The only case data is NULL or type is OBJ_ANY is when + * mark_object_reachable() calls us. All the callers of + * that function has non-NULL obj hence ... + */ if (!obj) { + /* ... these references to parent->fld are safe here */ printf("broken link from %7s %s\n", typename(parent->type), sha1_to_hex(parent->sha1)); printf("broken link from %7s %s\n", @@ -84,6 +90,7 @@ static int mark_object(struct object *obj, int type, void *data) } if (type != OBJ_ANY && obj->type != type) + /* ... and the reference to parent is safe here */ objerror(parent, "wrong object type in link"); if (obj->flags & REACHABLE) @@ -109,7 +116,7 @@ static void mark_object_reachable(struct object *obj) mark_object(obj, OBJ_ANY, NULL); } -static int traverse_one_object(struct object *obj, struct object *parent) +static int traverse_one_object(struct object *obj) { int result; struct tree *tree = NULL; @@ -138,7 +145,7 @@ static int traverse_reachable(void) entry = pending.objects + --pending.nr; obj = entry->item; parent = (struct object *) entry->name; - result |= traverse_one_object(obj, parent); + result |= traverse_one_object(obj); } return !!result; } @@ -556,8 +563,8 @@ static int fsck_cache_tree(struct cache_tree *it) sha1_to_hex(it->sha1)); return 1; } - mark_object_reachable(obj); obj->used = 1; + mark_object_reachable(obj); if (obj->type != OBJ_TREE) err |= objerror(obj, "non-tree in cache-tree"); } -- cgit v1.2.1 From ea6f0a23ac63b3a19202db5441704e3d79236ad4 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Wed, 26 Jan 2011 13:01:54 -0800 Subject: fsck: do not give up too early in fsck_dir() When there is a random garbage file whose name happens to be 38-byte long in a .git/objects/??/ directory, the loop terminated prematurely without marking all the other files that it hasn't checked in the readdir() loop. Treat such a file just like any other garbage file, and do not break out of the readdir() loop. While at it, replace repeated sprintf() calls to a single one outside the loop. Signed-off-by: Junio C Hamano --- builtin/fsck.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/builtin/fsck.c b/builtin/fsck.c index 91409a006..795aba087 100644 --- a/builtin/fsck.c +++ b/builtin/fsck.c @@ -392,10 +392,20 @@ static void add_sha1_list(unsigned char *sha1, unsigned long ino) sha1_list.nr = ++nr; } +static inline int is_loose_object_file(struct dirent *de, + char *name, unsigned char *sha1) +{ + if (strlen(de->d_name) != 38) + return 0; + memcpy(name + 2, de->d_name, 39); + return !get_sha1_hex(name, sha1); +} + static void fsck_dir(int i, char *path) { DIR *dir = opendir(path); struct dirent *de; + char name[100]; if (!dir) return; @@ -403,17 +413,13 @@ static void fsck_dir(int i, char *path) if (verbose) fprintf(stderr, "Checking directory %s\n", path); + sprintf(name, "%02x", i); while ((de = readdir(dir)) != NULL) { - char name[100]; unsigned char sha1[20]; if (is_dot_or_dotdot(de->d_name)) continue; - if (strlen(de->d_name) == 38) { - sprintf(name, "%02x", i); - memcpy(name+2, de->d_name, 39); - if (get_sha1_hex(name, sha1) < 0) - break; + if (is_loose_object_file(de, name, sha1)) { add_sha1_list(sha1, DIRENT_SORT_HINT(de)); continue; } -- cgit v1.2.1