Restore original EUID rather than 0 during option processing.

[ppp.git] / pppd / options.c

diff --git a/pppd/options.c b/pppd/options.c
index 5c9d3a0d9534345460c7dc247521506d59bd630d..a85239abb0c523908e2e51d69d2b296b79754fb2 100644 (file)
--- a/pppd/options.c
+++ b/pppd/options.c
@@ -40,7 +40,7 @@
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#define RCSID  "$Id: options.c,v 1.99 2006/06/04 07:04:57 paulus Exp $"
+#define RCSID  "$Id: options.c,v 1.100 2006/06/18 11:26:00 paulus Exp $"
 
 #include <ctype.h>
 #include <stdio.h>
@@ -399,17 +399,19 @@ options_from_file(filename, must_exist, check_prot, priv)
     option_t *opt;
     int oldpriv, n;
     char *oldsource;
+    uid_t euid;
     char *argv[MAXARGS];
     char args[MAXARGS][MAXWORDLEN];
     char cmd[MAXWORDLEN];
 
+    euid = geteuid();
     if (check_prot && seteuid(getuid()) == -1) {
        option_error("unable to drop privileges to open %s: %m", filename);
        return 0;
     }
     f = fopen(filename, "r");
     err = errno;
-    if (check_prot && seteuid(0) == -1)
+    if (check_prot && seteuid(euid) == -1)
        fatal("unable to regain privileges");
     if (f == NULL) {
        errno = err;
@@ -1512,7 +1514,9 @@ setlogfile(argv)
     char **argv;
 {
     int fd, err;
+    uid_t euid;
 
+    euid = geteuid();
     if (!privileged_option && seteuid(getuid()) == -1) {
        option_error("unable to drop permissions to open %s: %m", *argv);
        return 0;
@@ -1521,7 +1525,7 @@ setlogfile(argv)
     if (fd < 0 && errno == EEXIST)
        fd = open(*argv, O_WRONLY | O_APPEND);
     err = errno;
-    if (!privileged_option && seteuid(0) == -1)
+    if (!privileged_option && seteuid(euid) == -1)
        fatal("unable to regain privileges: %m");
     if (fd < 0) {
        errno = err;