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-rw-r--r--lib/libalpm/handle.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/lib/libalpm/handle.c b/lib/libalpm/handle.c
index b535e0f3..acd35409 100644
--- a/lib/libalpm/handle.c
+++ b/lib/libalpm/handle.c
@@ -22,12 +22,14 @@
#include "config.h"
+#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include <syslog.h>
#include <sys/stat.h>
+#include <fcntl.h>
/* libalpm */
#include "handle.h"
@@ -86,6 +88,58 @@ void _alpm_handle_free(pmhandle_t *handle)
FREE(handle);
}
+/** Lock the database */
+int _alpm_handle_lock(pmhandle_t *handle)
+{
+ int fd;
+ char *dir, *ptr;
+
+ ASSERT(handle->lockfile != NULL, return -1);
+ ASSERT(handle->lckstream == NULL, return 0);
+
+ /* create the dir of the lockfile first */
+ dir = strdup(handle->lockfile);
+ ptr = strrchr(dir, '/');
+ if(ptr) {
+ *ptr = '\0';
+ }
+ if(_alpm_makepath(dir)) {
+ FREE(dir);
+ return -1;
+ }
+ FREE(dir);
+
+ do {
+ fd = open(handle->lockfile, O_WRONLY | O_CREAT | O_EXCL, 0000);
+ } while(fd == -1 && errno == EINTR);
+ if(fd > 0) {
+ FILE *f = fdopen(fd, "w");
+ fprintf(f, "%ld\n", (long)getpid());
+ fflush(f);
+ fsync(fd);
+ handle->lckstream = f;
+ return 0;
+ }
+ return -1;
+}
+
+/** Remove a lock file */
+int _alpm_handle_unlock(pmhandle_t *handle)
+{
+ ASSERT(handle->lockfile != NULL, return -1);
+ ASSERT(handle->lckstream != NULL, return 0);
+
+ if(handle->lckstream != NULL) {
+ fclose(handle->lckstream);
+ handle->lckstream = NULL;
+ }
+ if(unlink(handle->lockfile) && errno != ENOENT) {
+ return -1;
+ }
+ return 0;
+}
+
+
alpm_cb_log SYMEXPORT alpm_option_get_logcb(pmhandle_t *handle)
{
CHECK_HANDLE(handle, return NULL);