pppd: Fix variable reference syntax in Makefile.linux

[ppp.git] / pppd / main.c

diff --git a/pppd/main.c b/pppd/main.c
index aef9e84775922a59cf6fb960d6f3aea53914ad7a..1b3f1e54bdd3250cb41fb986b89b3aaff355128e 100644 (file)
--- 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>
@@ -121,10 +120,9 @@
 #include "atcp.h"
 #endif
 
-static const char rcsid[] = RCSID;
 
 /* interface vars */
-char ifname[32];               /* Interface name */
+char ifname[MAXIFNAMELEN];     /* Interface name */
 int ifunit;                    /* Interface unit number */
 
 struct channel *the_channel;
@@ -181,7 +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 */
@@ -297,13 +295,6 @@ struct protent *protocols[] = {
     NULL
 };
 
-/*
- * If PPP_DRV_NAME is not defined, use the default "ppp" as the device name.
- */
-#if !defined(PPP_DRV_NAME)
-#define PPP_DRV_NAME   "ppp"
-#endif /* !defined(PPP_DRV_NAME) */
-
 int
 main(argc, argv)
     int argc;
@@ -606,19 +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)");
@@ -653,6 +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,
@@ -736,8 +737,11 @@ void
 set_ifunit(iskey)
     int iskey;
 {
-    info("Using interface %s%d", PPP_DRV_NAME, ifunit);
-    slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
+    if (req_ifname[0] != '\0')
+       slprintf(ifname, sizeof(ifname), "%s", req_ifname);
+    else
+       slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
+    info("Using interface %s", ifname);
     script_setenv("IFNAME", ifname, iskey);
     if (iskey) {
        create_pidfile(getpid());       /* write pid to file */
@@ -1436,7 +1440,7 @@ hup(sig)
        kill_my_pg(sig);
     notify(sigreceived, sig);
     if (waiting)
-       siglongjmp(sigjmp, 1);
+       write(sigpipe[1], &sig, sizeof(sig));
 }
 
 
@@ -1457,7 +1461,7 @@ term(sig)
        kill_my_pg(sig);
     notify(sigreceived, sig);
     if (waiting)
-       siglongjmp(sigjmp, 1);
+       write(sigpipe[1], &sig, sizeof(sig));
 }
 
 
@@ -1471,7 +1475,7 @@ chld(sig)
 {
     got_sigchld = 1;
     if (waiting)
-       siglongjmp(sigjmp, 1);
+       write(sigpipe[1], &sig, sizeof(sig));
 }
 
 
@@ -1506,7 +1510,7 @@ open_ccp(sig)
 {
     got_sigusr2 = 1;
     if (waiting)
-       siglongjmp(sigjmp, 1);
+       write(sigpipe[1], &sig, sizeof(sig));
 }
 
 
@@ -1570,7 +1574,8 @@ 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 */
@@ -1755,7 +1760,7 @@ update_script_environment()
                script_env[i] = newstring;
            else
                add_script_env(i, newstring);
-       } else {
+       } else if (p != NULL) {
            remove_script_env(i);
        }
     }