105 строки
3.5 KiB
Diff
105 строки
3.5 KiB
Diff
From eb22398e59ae2d17bfc444400cb688c82448cb92 Mon Sep 17 00:00:00 2001
|
|
From: Peter Hutterer <peter.hutterer@who-t.net>
|
|
Date: Wed, 12 Sep 2018 14:46:05 +1000
|
|
Subject: [PATCH app/sessreg] Replace strncpy calls with a sane version that
|
|
always terminates
|
|
|
|
Fixes coverity complaints about potentially unterminated strings
|
|
---
|
|
sessreg.c | 26 +++++++++++++++++---------
|
|
1 file changed, 17 insertions(+), 9 deletions(-)
|
|
|
|
diff --git a/sessreg.c b/sessreg.c
|
|
index 0a8fdb2..53b30b0 100644
|
|
--- a/sessreg.c
|
|
+++ b/sessreg.c
|
|
@@ -192,6 +192,14 @@ sysnerr (int x, const char *s)
|
|
return x;
|
|
}
|
|
|
|
+static void
|
|
+safe_strncpy(char *dest, const char *src, size_t n)
|
|
+{
|
|
+ (void)strncpy(dest, src, n);
|
|
+ if (n > 0)
|
|
+ dest[n - 1] = '\0';
|
|
+}
|
|
+
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
@@ -406,9 +414,9 @@ main (int argc, char **argv)
|
|
memset(&ll, 0, sizeof(ll));
|
|
ll.ll_time = current_time;
|
|
if (line)
|
|
- (void) strncpy (ll.ll_line, line, sizeof (ll.ll_line));
|
|
+ safe_strncpy (ll.ll_line, line, sizeof (ll.ll_line));
|
|
if (host_name)
|
|
- (void) strncpy (ll.ll_host, host_name, sizeof (ll.ll_host));
|
|
+ safe_strncpy (ll.ll_host, host_name, sizeof (ll.ll_host));
|
|
|
|
sysnerr (write (llog, (char *) &ll, sizeof (ll))
|
|
== sizeof (ll), "write lastlog entry");
|
|
@@ -429,11 +437,11 @@ set_utmp (struct utmp *u, char *line, char *user, char *host, time_t date, int a
|
|
{
|
|
memset (u, 0, sizeof (*u));
|
|
if (line)
|
|
- (void) strncpy (u->ut_line, line, sizeof (u->ut_line));
|
|
+ safe_strncpy (u->ut_line, line, sizeof (u->ut_line));
|
|
else
|
|
memset (u->ut_line, 0, sizeof (u->ut_line));
|
|
if (addp && user)
|
|
- (void) strncpy (u->ut_name, user, sizeof (u->ut_name));
|
|
+ safe_strncpy (u->ut_name, user, sizeof (u->ut_name));
|
|
else
|
|
memset (u->ut_name, 0, sizeof (u->ut_name));
|
|
#ifdef HAVE_STRUCT_UTMP_UT_ID
|
|
@@ -451,7 +459,7 @@ set_utmp (struct utmp *u, char *line, char *user, char *host, time_t date, int a
|
|
i -= sizeof (u->ut_id);
|
|
else
|
|
i = 0;
|
|
- (void) strncpy (u->ut_id, line + i, sizeof (u->ut_id));
|
|
+ safe_strncpy (u->ut_id, line + i, sizeof (u->ut_id));
|
|
} else
|
|
memset (u->ut_id, 0, sizeof (u->ut_id));
|
|
#endif
|
|
@@ -469,7 +477,7 @@ set_utmp (struct utmp *u, char *line, char *user, char *host, time_t date, int a
|
|
#endif
|
|
#ifdef HAVE_STRUCT_UTMP_UT_HOST
|
|
if (addp && host)
|
|
- (void) strncpy (u->ut_host, host, sizeof (u->ut_host));
|
|
+ safe_strncpy (u->ut_host, host, sizeof (u->ut_host));
|
|
else
|
|
memset (u->ut_host, 0, sizeof (u->ut_host));
|
|
#endif
|
|
@@ -513,7 +521,7 @@ set_utmpx (struct utmpx *u, const char *line, const char *user,
|
|
if(strcmp(line, ":0") == 0)
|
|
(void) strcpy(u->ut_line, "console");
|
|
else
|
|
- (void) strncpy (u->ut_line, line, sizeof (u->ut_line));
|
|
+ safe_strncpy (u->ut_line, line, sizeof (u->ut_line));
|
|
|
|
strncpy(u->ut_host, line, sizeof(u->ut_host));
|
|
#ifdef HAVE_STRUCT_UTMPX_UT_SYSLEN
|
|
@@ -523,7 +531,7 @@ set_utmpx (struct utmpx *u, const char *line, const char *user,
|
|
else
|
|
memset (u->ut_line, 0, sizeof (u->ut_line));
|
|
if (addp && user)
|
|
- (void) strncpy (u->ut_user, user, sizeof (u->ut_user));
|
|
+ safe_strncpy (u->ut_user, user, sizeof (u->ut_user));
|
|
else
|
|
memset (u->ut_user, 0, sizeof (u->ut_user));
|
|
|
|
@@ -541,7 +549,7 @@ set_utmpx (struct utmpx *u, const char *line, const char *user,
|
|
i -= sizeof (u->ut_id);
|
|
else
|
|
i = 0;
|
|
- (void) strncpy (u->ut_id, line + i, sizeof (u->ut_id));
|
|
+ safe_strncpy (u->ut_id, line + i, sizeof (u->ut_id));
|
|
|
|
/* make sure there is no entry using identical ut_id */
|
|
if (!UtmpxIdOpen(u->ut_id) && addp) {
|
|
--
|
|
2.17.1
|
|
|