fix line endings, add a try_mkdir function

1 files changed, 38 insertions, 27 deletions

diff --git a/lock.c b/lock.c
index 1075628..871425d 100644
--- a/lock.c
+++ b/lock.c
@@ -1,27 +1,38 @@
-/* See LICENSE for licence details. */

-#include <errno.h>

-#include <string.h>

-#include <stdio.h>

-#include <unistd.h>

-#include <sys/stat.h>

-#include <stdlib.h>

-

-int main(int argc, char **argv){

-	if(argc != 2){

-		fprintf(stderr, "Please supply one argument: the lock directory.\n");

-		return EXIT_FAILURE;

-	}

-

-	/* create lock */

-	if(mkdir(argv[1], S_IRUSR)){

-		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); ){

-			sleep(1);

-		}

-	}	

-	return EXIT_SUCCESS;

-}

+/* See LICENSE for licence details. */
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+
+int try_mkdir(const char *dn) {
+	int ret;
+
+	errno = 0;
+	ret = 0;
+
+	ret = mkdir(dn, S_IRUSR);
+	if(errno && errno != EEXIST) {
+		fprintf(stderr, "Failed to create lock %s.\n", dn);
+		exit(EXIT_FAILURE);
+	}
+		return ret;
+
+}
+
+int main(int argc, char **argv){
+	if(argc != 2){
+		fprintf(stderr, "Please supply one argument: the lock directory.\n");
+		return EXIT_FAILURE;
+	}
+
+	/* create lock */
+	if(try_mkdir(argv[1])){
+		/* lock exists */
+		for(; try_mkdir(argv[1]); ){
+			sleep(1);
+		}
+	}
+	return EXIT_SUCCESS;
+}