X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=wait_for_sysfs.c;h=d775eb1c95b9bce9099db482b0cb29500223ca6a;hb=a8f2703adaf21620bb92c04d3b8371f228cd11d2;hp=2252c30cd82229057ae836b8eb1b3c6163449d0b;hpb=cdd95f9a2d80beb3e4e32a10349fe6a69aa95f5a;p=elogind.git

diff --git a/wait_for_sysfs.c b/wait_for_sysfs.c
index 2252c30cd..d775eb1c9 100644
--- a/wait_for_sysfs.c
+++ b/wait_for_sysfs.c
@@ -6,6 +6,7 @@
  *		       directories and then just exit.
  *
  * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * 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
@@ -35,6 +36,10 @@
 #include "udev_version.h"
 #include "libsysfs/sysfs/libsysfs.h"
 
+#ifndef FILENAME_MAX
+#define FILENAME_MAX	4096
+#endif
+
 #ifdef LOG
 unsigned char logname[LOGNAME_SIZE];
 void log_message(int level, const char *format, ...)
@@ -63,6 +68,7 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev
 		{ .subsystem = "pcmcia_socket",	.file = "card_type" },
 		{ .subsystem = "usb_host",	.file = NULL },
 		{ .subsystem = "bluetooth",	.file = "address" },
+		{ .subsystem = "firmware",	.file = "data" },
 		{ .subsystem = "i2c-adapter",	.file = NULL },
 		{ .subsystem = "pci_bus",	.file = NULL },
 		{ .subsystem = "ieee1394",	.file = NULL },
@@ -72,6 +78,7 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev
 	};
 	struct class_file *classfile;
 	const char *file = "dev";
+	char filename[FILENAME_MAX];
 	int loop;
 
 	/* look if we want to look for another file instead of "dev" */
@@ -85,11 +92,22 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev
 			break;
 		}
 	}
-	dbg("looking at class '%s' for specific file '%s'", class_dev->classname, file);
+
+	strcpy(filename, class_dev->path);
+	strcat(filename, "/");
+	strcat(filename, file);
+	dbg("looking at class '%s' for specific file '%s' with full name %s", class_dev->classname, class_dev->path, filename);
 
 	loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
 	while (--loop) {
-		if (sysfs_get_classdev_attr(class_dev, file) != NULL) {
+		struct stat stats;
+
+		if (stat(class_dev->path, &stats) == -1) {
+			dbg("oops, the directory '%s' just disappeared.", class_dev->path);
+			return -ENODEV;
+		}
+
+		if (stat(filename, &stats) == 0) {	
 			dbg("class '%s' specific file '%s' found", class_dev->classname, file);
 			return 0;
 		}
@@ -98,14 +116,14 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev
 	}
 
 	dbg("error: getting class '%s' specific file '%s'", class_dev->classname, file);
-	return -1;
+	return -ENOENT;
 }
 
-/* skip waiting for physical device */
+/* check if we need to wait for a physical device */
 static int class_device_expect_no_device_link(struct sysfs_class_device *class_dev)
 {
-	/* List of devices without a "device" symlink
-	 * set .device to NULL to accept all devices in that subsystem */
+	/* list of devices without a "device" symlink to the physical device
+	 * if device is set to NULL, no devices in that subsystem has a link */
 	static struct class_device {
 		char *subsystem;
 		char *device;
@@ -143,6 +161,8 @@ static int class_device_expect_no_device_link(struct sysfs_class_device *class_d
 		{ .subsystem = "net",		.device = "ppp" },
 		{ .subsystem = "net",		.device = "lo" },
 		{ .subsystem = "net",		.device = "tap" },
+		{ .subsystem = "net",		.device = "ipsec" },
+		{ .subsystem = "net",		.device = "irda" },
 		{ .subsystem = "sound",		.device = NULL },
 		{ .subsystem = "printer",	.device = "lp" },
 		{ .subsystem = "nvidia",	.device = NULL },
@@ -154,15 +174,15 @@ static int class_device_expect_no_device_link(struct sysfs_class_device *class_d
 		{ .subsystem = "ieee1394",	.device = NULL },
 		{ .subsystem = "ieee1394_host",	.device = NULL },
 		{ .subsystem = "ieee1394_node",	.device = NULL },
+		{ .subsystem = "raw",		.device = NULL },
 		{ NULL, NULL }
 	};
 	struct class_device *classdevice;
 	int len;
 
-	/* look if we want to look for another file instead of "dev" */
 	for (classdevice = class_device; classdevice->subsystem != NULL; classdevice++) {
 		if (strcmp(class_dev->classname, classdevice->subsystem) == 0) {
-			/* if device is NULL, all devices in this class are ok */
+			/* see if no device in this class is expected to have a device-link */
 			if (classdevice->device == NULL)
 				return 1;
 
@@ -172,11 +192,11 @@ static int class_device_expect_no_device_link(struct sysfs_class_device *class_d
 			if (strncmp(class_dev->name, classdevice->device, len) != 0)
 				continue;
 
-			/* exact match */
+			/* exact name match */
 			if (strlen(class_dev->name) == len)
 				return 1;
 
-			/* instance numbers are matching too */
+			/* name match with instance number */
 			if (isdigit(class_dev->name[len]))
 				return 1;
 		}
@@ -278,6 +298,7 @@ int main(int argc, char *argv[], char *envp[])
 	struct sysfs_class_device *class_dev_parent;
 	struct sysfs_device *device_dev = NULL;
 	int loop;
+	int retval;
 	int rc = 0;
 
 	init_logging("wait_for_sysfs");
@@ -329,7 +350,10 @@ int main(int argc, char *argv[], char *envp[])
 		}
 		dbg("class_device opened '%s'", filename);
 
-		if (wait_for_class_device_attributes(class_dev) != 0) {
+		retval = wait_for_class_device_attributes(class_dev);
+		if (retval == -ENODEV)
+			goto exit_class;
+		if (retval != 0) {
 			rc = 4;
 			goto exit_class;
 		}