X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Ftty.c;h=d571b111d7e34755d9304104c075dcbcc16f4e44;hp=1ef8a52eacae3bf8a6560005c2659214e1186622;hb=7a7ed0a1a26961a165fd17183fd161c36a4b088f;hpb=5628c6cdf469989897d40a1820d725806a1fcbf2

diff --git a/pppd/tty.c b/pppd/tty.c
index 1ef8a52..d571b11 100644
--- a/pppd/tty.c
+++ b/pppd/tty.c
@@ -68,12 +68,13 @@
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#define RCSID	"$Id: tty.c,v 1.24 2005/07/12 01:09:05 paulus Exp $"
+#define RCSID	"$Id: tty.c,v 1.27 2008/07/01 12:27:56 paulus Exp $"
 
 #include <stdio.h>
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
+#include <termios.h>
 #include <unistd.h>
 #include <signal.h>
 #include <errno.h>
@@ -553,7 +554,6 @@ int connect_tty()
 	 * out and we want to use the modem lines, we reopen it later
 	 * in order to wait for the carrier detect signal from the modem.
 	 */
-	hungup = 0;
 	got_sigterm = 0;
 	connector = doing_callback? callback_script: connect_script;
 	if (devnam[0] != 0) {
@@ -563,12 +563,16 @@ int connect_tty()
 			int err, prio;
 
 			prio = privopen? OPRIO_ROOT: tty_options[0].priority;
-			if (prio < OPRIO_ROOT)
-				seteuid(uid);
+			if (prio < OPRIO_ROOT && seteuid(uid) == -1) {
+				error("Unable to drop privileges before opening %s: %m\n",
+				      devnam);
+				status = EXIT_OPEN_FAILED;
+				goto errret;
+			}
 			real_ttyfd = open(devnam, O_NONBLOCK | O_RDWR, 0);
 			err = errno;
-			if (prio < OPRIO_ROOT)
-				seteuid(0);
+			if (prio < OPRIO_ROOT && seteuid(0) == -1)
+				fatal("Unable to regain privileges");
 			if (real_ttyfd >= 0)
 				break;
 			errno = err;
@@ -684,11 +688,11 @@ int connect_tty()
 			if (device_script(initializer, ttyfd, ttyfd, 0) < 0) {
 				error("Initializer script failed");
 				status = EXIT_INIT_FAILED;
-				goto errret;
+				goto errretf;
 			}
 			if (got_sigterm) {
 				disconnect_tty();
-				goto errret;
+				goto errretf;
 			}
 			info("Serial port initialized.");
 		}
@@ -697,11 +701,11 @@ int connect_tty()
 			if (device_script(connector, ttyfd, ttyfd, 0) < 0) {
 				error("Connect script failed");
 				status = EXIT_CONNECT_FAILED;
-				goto errret;
+				goto errretf;
 			}
 			if (got_sigterm) {
 				disconnect_tty();
-				goto errret;
+				goto errretf;
 			}
 			info("Serial connection established.");
 		}
@@ -750,6 +754,9 @@ int connect_tty()
 
 	return ttyfd;
 
+ errretf:
+	if (real_ttyfd >= 0)
+		tcflush(real_ttyfd, TCIOFLUSH);
  errret:
 	if (pty_master >= 0) {
 		close(pty_master);
@@ -937,7 +944,7 @@ start_charshunt(ifd, ofd)
 	exit(0);
     }
     charshunt_pid = cpid;
-    record_child(cpid, "pppd (charshunt)", charshunt_done, NULL);
+    record_child(cpid, "pppd (charshunt)", charshunt_done, NULL, 1);
     return 1;
 }