_GNU_SOURCE should be defined for building vs uClibc

[project/procd.git] / inittab.c

diff --git a/inittab.c b/inittab.c
index d7bb35ba8d7578b58370f6e15359b820348eb7fb..6dde11af1a7ec9a1744b6fbd73e627f7061a840a 100644 (file)
--- a/inittab.c
+++ b/inittab.c
@@ -12,8 +12,10 @@
  * GNU General Public License for more details.
  */
 
+#define _GNU_SOURCE
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/ioctl.h>
 
 #include <fcntl.h>
 #include <stdio.h>
@@ -64,48 +66,39 @@ static char *ask = "/sbin/askfirst";
 
 static LIST_HEAD(actions);
 
-static int dev_open(const char *dev)
+static int dev_exist(const char *dev)
 {
-       int fd = -1;
+       int dfd, fd;
 
-       if (dev) {
-               chdir("/dev");
-               fd = open( dev, O_RDWR);
-               chdir("/");
-       }
+       dfd = open("/dev", O_PATH|O_DIRECTORY);
 
-       return fd;
-}
+       if (dfd < 0)
+               return 0;
 
-static int dev_exist(const char *dev)
-{
-       int res;
+       fd = openat(dfd, dev, O_RDONLY);
+       close(dfd);
 
-       res = dev_open(dev);
-       if (res != -1) {
-               close(res);
-       }
+       if (fd < 0)
+               return 0;
 
-       return (res != -1);
+       close(fd);
+       return 1;
 }
 
 static void fork_worker(struct init_action *a)
 {
-       int fd;
        pid_t p;
 
        a->proc.pid = fork();
        if (!a->proc.pid) {
-               p = setsid( );
-               fd = dev_open(a->id);
-               if (fd != -1)
-               {
-                       dup2(fd, STDIN_FILENO);
-                       dup2(fd, STDOUT_FILENO);
-                       dup2(fd, STDERR_FILENO);
-                       tcsetpgrp(fd, p);
-                       close(fd);
-               }
+               p = setsid();
+
+               if (patch_stdio(a->id))
+                       ERROR("Failed to setup i/o redirection\n");
+
+               ioctl(STDIN_FILENO, TIOCSCTTY, 1);
+               tcsetpgrp(STDIN_FILENO, p);
+
                execvp(a->argv[0], a->argv);
                ERROR("Failed to execute %s\n", a->argv[0]);
                exit(-1);
@@ -144,7 +137,10 @@ static void runrc(struct init_action *a)
                ERROR("valid format is rcS <S|K> <param>\n");
                return;
        }
-       rcS(a->argv[1], a->argv[2], rcdone);
+
+       /* proceed even if no init or shutdown scripts run */
+       if (rcS(a->argv[1], a->argv[2], rcdone))
+               rcdone(NULL);
 }
 
 static void askfirst(struct init_action *a)
@@ -176,18 +172,23 @@ static void askconsole(struct init_action *a)
                split = strchr(tty, ',');
                if (split != NULL)
                        *split = '\0';
-       }
 
-       if (!dev_exist(tty)) {
-               DEBUG(4, "skipping %s\n", tty);
-               return;
+               if (!dev_exist(tty)) {
+                       DEBUG(4, "skipping %s\n", tty);
+                       return;
+               }
+
+               console = strdup(tty);
+               a->id = strdup(tty);
+       }
+       else {
+               console = NULL;
+               a->id = NULL;
        }
-       console = strdup(tty);
 
        a->tout.cb = respawn;
        for (i = MAX_ARGS - 1; i >= 1; i--)
                a->argv[i] = a->argv[i - 1];
-       a->id = strdup(tty);
        a->argv[0] = ask;
        a->respawn = 500;