From a23ce913585ac65765fccf9cd770e0213d9e7a4a Mon Sep 17 00:00:00 2001
From: Simon Lieb <pips@e5150.fr>
Date: Fri, 11 Feb 2022 18:15:32 +0100
Subject: [PATCH] check chdir(2) & freopen(3) errors

---
 stt.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/stt.c b/stt.c
index 3a35f4b..1ca4ece 100644
--- a/stt.c
+++ b/stt.c
@@ -72,8 +72,9 @@ opentimesfile()
 		//oldcwd = dirfd(opendir("."));
 
 		passwd = getpwuid(getuid());
-		chdir(passwd->pw_dir);
-
+		if (chdir(passwd->pw_dir) == -1) {
+			perror("chdir failed");
+		}
 		fp = fopen(timesfile, "a+");
 
 		if (fp == NULL) {
@@ -377,7 +378,9 @@ default:
 		changed = 1;
 	}
 	if (changed) {
-		freopen(timesfile, "w", fp);
+		if (freopen(timesfile, "w", fp) == NULL) {
+			perror("reopen failed");
+		}
 		writetimes(fp, timestree);
 	}
 	if (list) {