X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=dev_d.c;h=c091f11c28726cc02d5a165bdecd38d7befad1da;hb=f608f8ac16889ce0e7e800c7f11dacc558d097c1;hp=36bee33bd9fbe1e049e4d0b97e5c5d280b2d2a42;hpb=dd64e26b0c88892b367f57c4c7a7484e35641c7c;p=elogind.git

diff --git a/dev_d.c b/dev_d.c
index 36bee33bd..c091f11c2 100644
--- a/dev_d.c
+++ b/dev_d.c
@@ -1,117 +1,127 @@
 /*
- * dev.d multipleer
+ * dev_d.c - dev.d/ multiplexer
  * 
  * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
  *
  *	This program is free software; you can redistribute it and/or modify it
  *	under the terms of the GNU General Public License as published by the
  *	Free Software Foundation version 2 of the License.
- * 
- * Based on the klibc version of hotplug written by:
- *	Author(s) Christian Borntraeger <cborntra@de.ibm.com>
- * which was based on the shell script written by:
- *	Greg Kroah-Hartman <greg@kroah.com>
- *
  */
 
-/* 
+/*
  * This essentially emulates the following shell script logic in C:
-	DIR="/etc/dev.d"
-	export DEVNODE="whatever_dev_name_udev_just_gave"
-	for I in "${DIR}/$DEVNODE/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do
-		if [ -f $I ]; then $I $1 ; fi
-	done
-	exit 1;
+ *	DIR="/etc/dev.d"
+ *	export DEVNAME="whatever_dev_name_udev_just_gave"
+ *	for I in "${DIR}/$DEVNAME/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do
+ *		if [ -f $I ]; then $I $1 ; fi
+ *	done
+ *	exit 1;
  */
 
-#include <dirent.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <sys/stat.h>
 #include <unistd.h>
+#include <fcntl.h>
+
 #include "udev.h"
 #include "udev_lib.h"
+#include "udevdb.h"
 #include "logging.h"
 
-#define HOTPLUGDIR	"/etc/dev.d"
-#define COMMENT_PREFIX	'#'
+#define DEVD_DIR			"/etc/dev.d/"
+#define DEVD_SUFFIX			".dev"
 
-static void run_program(char *name)
+static int run_program(char *name)
 {
 	pid_t pid;
+	int fd;
 
 	dbg("running %s", name);
 
 	pid = fork();
-
-	if (pid < 0) {
-		perror("fork");
-		return;
-	} 
-	
-	if (pid > 0) {
+	switch (pid) {
+	case 0:
+		/* child */
+		udevdb_exit();  /* close udevdb */
+		fd = open("/dev/null", O_RDWR);
+		if ( fd >= 0) {
+			dup2(fd, STDOUT_FILENO);
+			dup2(fd, STDIN_FILENO);
+			dup2(fd, STDERR_FILENO);
+		}
+		close(fd);
+		execv(name, main_argv);
+		dbg("exec of child failed");
+		exit(1);
+	case -1:
+		dbg("fork of child failed");
+		break;
+		return -1;
+	default:
 		wait(NULL);
-		return;
 	}
 
-	execv(name, main_argv);
-	exit(1);
+	return 0;
 }
 
-static void execute_dir (char *dirname)
+/* 
+ * runs files in these directories in order:
+ * 	<node name given by udev>/
+ * 	subsystem/
+ * 	default/
+ */
+void dev_d_send(struct udevice *dev, const char *subsystem, const char *devpath)
 {
-	DIR *directory;
-	struct dirent *entry;
-	char filename[256];
+	char dirname[256];
+	char env_devname[NAME_SIZE];
+	char *devname;
+	char *temp;
 
-	dbg("opening %s", dirname);
-	directory = opendir(dirname);
-	if (!directory)
+	if (udev_dev_d == 0)
 		return;
 
-	while ((entry = readdir(directory))) {
-		if (entry->d_name[0] == '\0')
-			break;
-		/* Don't run the files '.', '..', or hidden files, 
-		 * or files that start with a '#' */
-		if ((entry->d_name[0] == '.') ||
-		    (entry->d_name[0] == COMMENT_PREFIX))
-			continue;
-
-		/* FIXME - need to use file_list_insert() here to run these in sorted order... */
-		snprintf(filename, sizeof(filename), "%s%s", dirname, entry->d_name);
-		filename[sizeof(filename)-1] = '\0';
-		run_program(filename);
+	memset(env_devname, 0x00, sizeof(env_devname));
+	if (dev->type == 'b' || dev->type == 'c') {
+		strfieldcpy(env_devname, udev_root);
+		strfieldcat(env_devname, dev->name);
+	} else if (dev->type == 'n') {
+		strfieldcpy(env_devname, dev->name);
+		setenv("DEVPATH", devpath, 1);
 	}
+	setenv("DEVNAME", env_devname, 1);
+	dbg("DEVNAME='%s'", env_devname);
 
-	closedir(directory);
-}
-
-/* runs files in these directories in order:
- * 	name given by udev
- * 	subsystem
- * 	default
- */
-void dev_d_send(struct udevice *dev, char *subsystem)
-{
-	char dirname[256];
-	char devnode[NAME_SIZE];
+	devname = strdup(dev->name);
+	if (!devname) {
+		dbg("out of memory");
+		return;
+	}
 
-	strfieldcpy(devnode, udev_root);
-	strfieldcat(devnode, dev->name);
-	setenv("DEVNODE", devnode, 1);
+	/* Chop the device name up into pieces based on '/' */
+	temp = strchr(devname, '/');
+	while (temp != NULL) {
+		*temp = 0x00;
+		strcpy(dirname, DEVD_DIR);
+		strfieldcat(dirname, devname);
+		call_foreach_file(run_program, dirname, DEVD_SUFFIX);
+
+		*temp = '/';
+		++temp;
+		temp = strchr(temp, '/');
+	}
 
-	snprintf(dirname, sizeof(dirname), HOTPLUGDIR "/%s/", dev->name);
-	dirname[sizeof(dirname)-1] = '\0';
-	execute_dir(dirname);
+	strcpy(dirname, DEVD_DIR);
+	strfieldcat(dirname, dev->name);
+	call_foreach_file(run_program, dirname, DEVD_SUFFIX);
 
-	snprintf(dirname, sizeof(dirname), HOTPLUGDIR "/%s/", subsystem);
-	dirname[sizeof(dirname)-1] = '\0';
-	execute_dir(dirname);
+	strcpy(dirname, DEVD_DIR);
+	strfieldcat(dirname, subsystem);
+	call_foreach_file(run_program, dirname, DEVD_SUFFIX);
 
-	strcpy(dirname, HOTPLUGDIR "/default/");
-	execute_dir(dirname);
+	strcpy(dirname, DEVD_DIR "default");
+	call_foreach_file(run_program, dirname, DEVD_SUFFIX);
 }
-