From f065cbde7ec718abacee989efb5e5d6372dcfd50 Mon Sep 17 00:00:00 2001
From: Ryan Kavanagh <rak@rak.ac>
Date: Fri, 11 Sep 2020 11:49:11 -0400
Subject: Better error handling, and a verbose option

---
 cleanup.c | 58 +++++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 39 insertions(+), 19 deletions(-)

diff --git a/cleanup.c b/cleanup.c
index da9268e..429c8c2 100644
--- a/cleanup.c
+++ b/cleanup.c
@@ -22,6 +22,7 @@
 #include <fts.h>
 
 #include <err.h>
+#include <errno.h>
 #include <math.h>
 #include <stdio.h>
 #include <time.h>
@@ -30,7 +31,7 @@
 const double mind = 30.0;
 const double maxd = 90.0;
 const double max_size = 33554432; // 32MB
-char* paths[1] = {"/var/www/users/tmp"};
+char* paths[2] = {"/var/www/users/~tmp", NULL};
 
 int
 main(int argc, char * const argv[])
@@ -43,30 +44,49 @@ main(int argc, char * const argv[])
 	double file_age = 0;
 	time_t curr_time = time(NULL);
 
-	file_system = fts_open(paths, 0, NULL);
+	int verbose, ch;
 
-	if (file_system != NULL) {
-		while ((node = fts_read(file_system)) != NULL) {
-			switch (node->fts_info) {
-			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) * \
-					pow((double) attr.st_size / (double) max_size - 1, 3.0);
+	verbose = 0;
+	while ((ch = getopt(argc, argv, "v")) != -1) {
+		switch (ch) {
+		case 'v':
+			verbose = 1;
+			break;
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if ((file_system = fts_open(paths, 0, NULL)) == NULL)
+		errx(1, NULL);
 
-				if (file_age >= cutoff) {
-					// printf("%s age %fs cuttoff %fs size %lld B delete\n", \
-					// node->fts_name, file_age, cutoff, attr.st_size);
-					unlink(node->fts_name);
-				}
-				break;
-			default:
-				break;
+	while ((node = fts_read(file_system)) != NULL) {
+		if (node->fts_errno)
+			err(node->fts_errno, "%s", node->fts_path);
+
+		switch (node->fts_info) {
+		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);
+			if (verbose)
+				printf("%s age %fs cuttoff %fs size %lldB\n",
+				       node->fts_name, file_age, cutoff, attr.st_size);
+			if (file_age >= cutoff) {
+				unlink(node->fts_name);
+				if (verbose)
+					printf("%s deleted\n", node->fts_name);
 			}
+			break;
+		default:
+			break;
 		}
 	}
 
+	fts_close(file_system);
+
 
 	return 0;
 }
-- 
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