diff options
author | Calvin Morrison <mutantturkey@gmail.com> | 2014-04-11 08:14:19 -0400 |
---|---|---|
committer | Calvin Morrison <mutantturkey@gmail.com> | 2014-04-11 08:14:19 -0400 |
commit | 7afe66fc6864c7b7a5fc1b0379cf2be29a22c057 (patch) | |
tree | 5beaf3d3281d4c57388b58a9d9d8a14225e8f76d | |
parent | 0d9f550bb48f49c11bbf7220d74b9453731149c6 (diff) | |
parent | ed2589219056458a20aa399d128e06394f632e15 (diff) |
Merge pull request #1 from mar77i/master
Obvious fixes.
-rw-r--r-- | lock.c | 39 | ||||
-rwxr-xr-x | lock.sh | 2 |
2 files changed, 11 insertions, 30 deletions
@@ -1,4 +1,5 @@ /* See LICENSE for licence details. */
+#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
@@ -14,39 +15,19 @@ int main(int argc, char **argv){ return EXIT_FAILURE;
}
- if(access(argv[1], F_OK)){
- /* create lock */
- if(mkdir(argv[1], S_IRUSR | S_IXUSR)){
+ /* create lock */
+ if(mkdir(argv[1], S_IRUSR | S_IXUSR)){
+ if(errno && errno != EEXIST) {
fprintf(stderr, "Failed to create lock %s.\n", argv[1]);
return EXIT_FAILURE;
}
+ /* lock exists */
+ for(; mkdir(argv[1], S_IRUSR | S_IXUSR);){
+ sleep(1);
+ }
+ return EXIT_SUCCESS;
+ } else
return EXIT_SUCCESS;
}
- /* prepare path */
- argvlen = strlen(argv[1]);
- pathlen = argvlen + sizeof("/..") + 1;
- path = malloc(pathlen);
- if(path == NULL) {
- fprintf(stderr, "malloc() failed\n");
- return EXIT_FAILURE;
- }
-
- memcpy(path, argv[1], argvlen);
- memcpy(path + argvlen, "/..\0", sizeof("/..") + 1);
-
- if(access(path, F_OK)){
- /* invalid lock */
- fprintf(stderr, "%s is not a lock directory.\n", argv[1]);
- free(path);
- return EXIT_FAILURE;
- }
-
- /* lock exists */
- for(; !access(path, F_OK) ;){
- sleep(1);
- }
-
- free(path);
- return EXIT_SUCCESS;
}
@@ -11,7 +11,7 @@ lock() { echo "lock $1 found, waiting for unlock" >&2 while true; do sleep 2; - if [[ ! -d "$1" ]]; then + if mkdir "$1" &>/dev/null; then return fi done |