diff options
Diffstat (limited to 'index.c')
| -rw-r--r-- | index.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/index.c b/index.c new file mode 100644 index 0000000000..f92b960ae4 --- /dev/null +++ b/index.c @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2005, Junio C Hamano + */ +#include <signal.h> +#include "cache.h" + +static struct cache_file *cache_file_list; + +static void remove_lock_file(void) +{ + while (cache_file_list) { + if (cache_file_list->lockfile[0]) + unlink(cache_file_list->lockfile); + cache_file_list = cache_file_list->next; + } +} + +static void remove_lock_file_on_signal(int signo) +{ + remove_lock_file(); + signal(SIGINT, SIG_DFL); + raise(signo); +} + +int hold_index_file_for_update(struct cache_file *cf, const char *path) +{ + int fd; + sprintf(cf->lockfile, "%s.lock", path); + fd = open(cf->lockfile, O_RDWR | O_CREAT | O_EXCL, 0666); + if (fd >=0 && !cf->next) { + cf->next = cache_file_list; + cache_file_list = cf; + signal(SIGINT, remove_lock_file_on_signal); + atexit(remove_lock_file); + } + return fd; +} + +int commit_index_file(struct cache_file *cf) +{ + char indexfile[PATH_MAX]; + int i; + strcpy(indexfile, cf->lockfile); + i = strlen(indexfile) - 5; /* .lock */ + indexfile[i] = 0; + i = rename(cf->lockfile, indexfile); + cf->lockfile[0] = 0; + return i; +} + +void rollback_index_file(struct cache_file *cf) +{ + if (cf->lockfile[0]) + unlink(cf->lockfile); + cf->lockfile[0] = 0; +} + |