X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fprocd.git;a=blobdiff_plain;f=inittab.c;h=011d7a67e644841ed5ed7cb95e4f88c385b6cceb;hp=2d9a1e08d25faaddbfdd6297b560a85f2e3530ad;hb=961dc692aff7457f874bce61f8e766514edcf794;hpb=174777181850705df7c6dbe234bd7e93d352666a

diff --git a/inittab.c b/inittab.c
index 2d9a1e0..011d7a6 100644
--- 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>
@@ -29,6 +31,10 @@
 #include "procd.h"
 #include "rcS.h"
 
+#ifndef O_PATH
+#define O_PATH		010000000
+#endif
+
 #define TAG_ID		0
 #define TAG_RUNLVL	1
 #define TAG_ACTION	2
@@ -37,7 +43,7 @@
 #define MAX_ARGS	8
 
 struct init_action;
-const char *console;
+char *console = NULL;
 
 struct init_handler {
 	const char *name;
@@ -64,10 +70,39 @@ static char *ask = "/sbin/askfirst";
 
 static LIST_HEAD(actions);
 
+static int dev_exist(const char *dev)
+{
+	int dfd, fd;
+
+	dfd = open("/dev", O_PATH|O_DIRECTORY);
+
+	if (dfd < 0)
+		return 0;
+
+	fd = openat(dfd, dev, O_RDONLY);
+	close(dfd);
+
+	if (fd < 0)
+		return 0;
+
+	close(fd);
+	return 1;
+}
+
 static void fork_worker(struct init_action *a)
 {
+	pid_t p;
+
 	a->proc.pid = fork();
 	if (!a->proc.pid) {
+		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);
@@ -106,27 +141,25 @@ 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)
 {
-	struct stat s;
 	int i;
 
-	chdir("/dev");
-	i = stat(a->id, &s);
-	chdir("/");
-	if (i || (console && !strcmp(console, a->id))) {
+	if (!dev_exist(a->id) || (console && !strcmp(console, a->id))) {
 		DEBUG(4, "Skipping %s\n", a->id);
 		return;
 	}
 
 	a->tout.cb = respawn;
-	for (i = MAX_ARGS - 2; i >= 2; i--)
-		a->argv[i] = a->argv[i - 2];
+	for (i = MAX_ARGS - 1; i >= 1; i--)
+		a->argv[i] = a->argv[i - 1];
 	a->argv[0] = ask;
-	a->argv[1] = a->id;
 	a->respawn = 500;
 
 	a->proc.cb = child_exit;
@@ -135,29 +168,32 @@ static void askfirst(struct init_action *a)
 
 static void askconsole(struct init_action *a)
 {
-	struct stat s;
 	char line[256], *tty, *split;
 	int i;
 
 	tty = get_cmdline_val("console", line, sizeof(line));
-	split=strchr(tty, ',');
-	if (split != NULL)
-		split = '\0';
-	
-	chdir("/dev");
-	i = stat(tty, &s);
-	chdir("/");
-	if (i) {
-		DEBUG(4, "skipping %s\n", tty);
-		return;
+	if (tty != NULL) {
+		split = strchr(tty, ',');
+		if (split != NULL)
+			*split = '\0';
+
+		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 - 2; i >= 2; i--)
-		a->argv[i] = a->argv[i - 2];
+	for (i = MAX_ARGS - 1; i >= 1; i--)
+		a->argv[i] = a->argv[i - 1];
 	a->argv[0] = ask;
-	a->argv[1] = strdup(tty);
 	a->respawn = 500;
 
 	a->proc.cb = child_exit;
@@ -192,6 +228,14 @@ static struct init_handler handlers[] = {
 		.name = "respawn",
 		.cb = rcrespawn,
 		.multi = 1,
+	}, {
+		.name = "askconsolelate",
+		.cb = askconsole,
+		.multi = 1,
+	}, {
+		.name = "respawnlate",
+		.cb = rcrespawn,
+		.multi = 1,
 	}
 };