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authorLars Hjemli <hjemli@gmail.com>2006-12-11 12:10:12 +0100
committerLars Hjemli <hjemli@gmail.com>2006-12-11 12:10:12 +0100
commit318d106300102c19d114a4ea89265b0a4060d9cb (patch)
tree3752575abec74ee0a2b544e36e3cc8f9cdfa1e66 /cgit.c
parenta581ed8d6c15b0734b082fbadf0a907c2b170423 (diff)
Avoid infinite loops in caching layer
Add a global variable, cgit_max_lock_attemps, to avoid the possibility of infinite loops when failing to acquire a lockfile. This could happen on broken setups or under crazy server load. Incidentally, this also fixes a lurking bug in cache_lock() where an uninitialized returnvalue was used. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Diffstat (limited to '')
-rw-r--r--cgit.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/cgit.c b/cgit.c
index 7f14016..dc91125 100644
--- a/cgit.c
+++ b/cgit.c
@@ -31,6 +31,7 @@ char *cgit_virtual_root = NULL;
char *cgit_cache_root = "/var/cache/cgit";
+int cgit_max_lock_attempts = 5;
int cgit_cache_root_ttl = 5;
int cgit_cache_repo_ttl = 5;
int cgit_cache_dynamic_ttl = 5;
@@ -465,11 +466,17 @@ static void cgit_fill_cache(struct cacheitem *item)
static void cgit_refresh_cache(struct cacheitem *item)
{
+ int i = 0;
+
cache_prepare(item);
top:
+ if (++i > cgit_max_lock_attempts) {
+ die("cgit_refresh_cache: unable to lock %s: %s",
+ item->name, strerror(errno));
+ }
if (!cache_exist(item)) {
if (!cache_lock(item)) {
- sched_yield();
+ sleep(1);
goto top;
}
if (!cache_exist(item))