X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=pppd%2Fmain.c;h=9e9803a2c81fdce2e44f781cc98f354b557df08d;hb=56371803b11c557e07ae968bef34b178b518139d;hp=b0d772bba8b86d5da4a9179f5440e17211c970ab;hpb=d8e8d7a74b791743ad67e8bdba10508b0f901beb;p=ppp.git

diff --git a/pppd/main.c b/pppd/main.c
index b0d772b..9e9803a 100644
--- a/pppd/main.c
+++ b/pppd/main.c
@@ -80,7 +80,6 @@
 #include <netdb.h>
 #include <utmp.h>
 #include <pwd.h>
-#include <setjmp.h>
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/wait.h>
@@ -180,7 +179,7 @@ int got_sighup;
 
 static sigset_t signals_handled;
 static int waiting;
-static sigjmp_buf sigjmp;
+static int sigpipe[2];
 
 char **script_env;		/* Env. variable values for scripts */
 int s_env_nalloc;		/* # words avail at script_env */
@@ -598,19 +597,21 @@ static void
 handle_events()
 {
     struct timeval timo;
+    unsigned char buf[16];
 
     kill_link = open_ccp_flag = 0;
-    if (sigsetjmp(sigjmp, 1) == 0) {
-	sigprocmask(SIG_BLOCK, &signals_handled, NULL);
-	if (got_sighup || got_sigterm || got_sigusr2 || got_sigchld) {
-	    sigprocmask(SIG_UNBLOCK, &signals_handled, NULL);
-	} else {
-	    waiting = 1;
-	    sigprocmask(SIG_UNBLOCK, &signals_handled, NULL);
-	    wait_input(timeleft(&timo));
-	}
-    }
+
+    /* alert via signal pipe */
+    waiting = 1;
+    /* flush signal pipe */
+    for (; read(sigpipe[0], buf, sizeof(buf)) > 0; );
+    add_fd(sigpipe[0]);
+    /* wait if necessary */
+    if (!(got_sighup || got_sigterm || got_sigusr2 || got_sigchld))
+	wait_input(timeleft(&timo));
     waiting = 0;
+    remove_fd(sigpipe[0]);
+
     calltimeout();
     if (got_sighup) {
 	info("Hangup (SIGHUP)");
@@ -645,6 +646,14 @@ setup_signals()
 {
     struct sigaction sa;
 
+    /* create pipe to wake up event handler from signal handler */
+    if (pipe(sigpipe) < 0)
+	fatal("Couldn't create signal pipe: %m");
+    fcntl(sigpipe[0], F_SETFD, fcntl(sigpipe[0], F_GETFD) | FD_CLOEXEC);
+    fcntl(sigpipe[1], F_SETFD, fcntl(sigpipe[1], F_GETFD) | FD_CLOEXEC);
+    fcntl(sigpipe[0], F_SETFL, fcntl(sigpipe[0], F_GETFL) | O_NONBLOCK);
+    fcntl(sigpipe[1], F_SETFL, fcntl(sigpipe[1], F_GETFL) | O_NONBLOCK);
+
     /*
      * Compute mask of all interesting signals and install signal handlers
      * for each.  Only one signal handler may be active at a time.  Therefore,
@@ -734,6 +743,9 @@ set_ifunit(iskey)
 	slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
     info("Using interface %s", ifname);
     script_setenv("IFNAME", ifname, iskey);
+    char ifkey[32];
+    slprintf(ifkey, sizeof(ifkey), "%d", ifunit);
+    script_setenv("UNIT", ifkey, iskey);
     if (iskey) {
 	create_pidfile(getpid());	/* write pid to file */
 	create_linkpidfile(getpid());
@@ -1431,7 +1443,7 @@ hup(sig)
 	kill_my_pg(sig);
     notify(sigreceived, sig);
     if (waiting)
-	siglongjmp(sigjmp, 1);
+	write(sigpipe[1], &sig, sizeof(sig));
 }
 
 
@@ -1452,7 +1464,7 @@ term(sig)
 	kill_my_pg(sig);
     notify(sigreceived, sig);
     if (waiting)
-	siglongjmp(sigjmp, 1);
+	write(sigpipe[1], &sig, sizeof(sig));
 }
 
 
@@ -1466,7 +1478,7 @@ chld(sig)
 {
     got_sigchld = 1;
     if (waiting)
-	siglongjmp(sigjmp, 1);
+	write(sigpipe[1], &sig, sizeof(sig));
 }
 
 
@@ -1501,7 +1513,7 @@ open_ccp(sig)
 {
     got_sigusr2 = 1;
     if (waiting)
-	siglongjmp(sigjmp, 1);
+	write(sigpipe[1], &sig, sizeof(sig));
 }
 
 
@@ -1565,7 +1577,8 @@ safe_fork(int infd, int outfd, int errfd)
 	/* Executing in the child */
 	sys_close();
 #ifdef USE_TDB
-	tdb_close(pppdb);
+	if (pppdb != NULL)
+		tdb_close(pppdb);
 #endif
 
 	/* make sure infd, outfd and errfd won't get tromped on below */