Add a dryrun flag and treat times as days instead of seconds

1 files changed, 12 insertions, 7 deletions

diff --git a/cleanup.c b/cleanup.c
index 429c8c2..3dd6e36 100644
--- a/cleanup.c
+++ b/cleanup.c
@@ -44,14 +44,18 @@ main(int argc, char * const argv[])
 	double file_age = 0;
 	time_t curr_time = time(NULL);
 
-	int verbose, ch;
+	int verbose, dryrun, ch;
 
 	verbose = 0;
-	while ((ch = getopt(argc, argv, "v")) != -1) {
+	dryrun = 0;
+	while ((ch = getopt(argc, argv, "vn")) != -1) {
 		switch (ch) {
 		case 'v':
 			verbose = 1;
 			break;
+		case 'n':
+			dryrun = 1;
+			break;
 		}
 	}
 	argc -= optind;
@@ -68,14 +72,15 @@ main(int argc, char * const argv[])
 		case FTS_F:
 			if (stat(node->fts_name, &attr) == -1)
 				err(1, NULL);
-			file_age = difftime(curr_time, attr.st_mtime);
-			cutoff = mind + (mind - maxd) * 86400 *
-				pow((double) attr.st_size / (double) max_size - 1, 3.0);
+			file_age = difftime(curr_time, attr.st_mtime) / 86400.0;
+			cutoff = mind + (mind - maxd) *
+				     pow((double) attr.st_size / (double) max_size - 1, 3.0);
 			if (verbose)
-				printf("%s age %fs cuttoff %fs size %lldB\n",
+				printf("%s age %fd cuttoff %fd size %lldB\n",
 				       node->fts_name, file_age, cutoff, attr.st_size);
 			if (file_age >= cutoff) {
-				unlink(node->fts_name);
+				if (!dryrun)
+					unlink(node->fts_name);
 				if (verbose)
 					printf("%s deleted\n", node->fts_name);
 			}