Arch Linux User Repository

From: Tiago de Paula <tiagodepalves@gmail.com>
Date: Sun, 21 Sep 2025 05:52:20 -0300
Subject: [PATCH 1/2] fix: GCC 15 build

---
 chklastlog.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chklastlog.c b/chklastlog.c
index ade198d..5748795 100644
--- a/chklastlog.c
+++ b/chklastlog.c
@@ -77,7 +77,7 @@ int main () { return 0; }
 long total_wtmp_bytes_read=0;
 size_t wtmp_file_size;
 uid_t *uid;
-void read_status();
+void read_status(int signo);

 struct s_localpwd {
      int numentries;
@@ -213,7 +213,7 @@ int nonuser(struct utmp utmp_ent)
 }
 #endif

-void read_status() {
+void read_status(int signo) {
    double remaining_time;
    static long last_total_bytes_read=0;
    int diff;
-- 
2.51.0

From: Tiago de Paula <tiagodepalves@gmail.com>
Date: Sun, 21 Sep 2025 05:52:55 -0300
Subject: [PATCH 2/2] fix: reading uninitialized memory

---
 chklastlog.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/chklastlog.c b/chklastlog.c
index 5748795..555f16e 100644
--- a/chklastlog.c
+++ b/chklastlog.c
@@ -108,25 +108,27 @@ int main(int argc, char*argv[]) {
    struct s_localpwd   *localpwd;
    uid_t       *uid;
         char wtmpfile[128], lastlogfile[128];
+        memset(wtmpfile, '\0', 128);
+        memset(lastlogfile, '\0', 128);

-        memcpy(wtmpfile, WTMP_FILENAME, 127);
-        memcpy(lastlogfile, LASTLOG_FILENAME, 127);
+        strncpy(wtmpfile, WTMP_FILENAME, 127);
+        strncpy(lastlogfile, LASTLOG_FILENAME, 127);

         while (--argc && ++argv) /* poor man getopt */
         {
-           if (!memcmp("-f", *argv, 2))
+           if (!strncmp("-f", *argv, 2))
            {
               if (!--argc)
                  break;
               ++argv;
-              memcpy(wtmpfile, *argv, 127);
+              strncpy(wtmpfile, *argv, 127);
            }
-           else if (!memcmp("-l", *argv, 2))
+           else if (!strncmp("-l", *argv, 2))
            {
               if (!--argc)
                  break;
               ++argv;
-              memcpy(lastlogfile, *argv, 127);
+              strncpy(lastlogfile, *argv, 127);
            }
         }

-- 
2.51.0