From: greg@kroah.com <greg@kroah.com>
Date: Wed, 22 Oct 2003 03:19:09 +0000 (-0700)
Subject: [PATCH] make config files, sysfs root, and udev root configurable from config variables
X-Git-Tag: 005~33
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=c056c5141b16fe95485eeb233fe8b90954686a60

[PATCH] make config files, sysfs root, and udev root configurable from config variables

This will make running tests a lot simpler.
---

diff --git a/namedev.c b/namedev.c
index c21a5be7a..f2842ce43 100644
--- a/namedev.c
+++ b/namedev.c
@@ -197,7 +197,6 @@ static int get_pair(char **orig_string, char **left, char **right)
 
 static int namedev_init_config(void)
 {
-	char filename[255];
 	char line[255];
 	char *temp;
 	char *temp2;
@@ -206,11 +205,10 @@ static int namedev_init_config(void)
 	int retval = 0;
 	struct config_device dev;
 
-	strcpy(filename, UDEV_CONFIG_DIR NAMEDEV_CONFIG_FILE);
-	dbg("opening %s to read as permissions config", filename);
-	fd = fopen(filename, "r");
+	dbg("opening %s to read as permissions config", udev_config_filename);
+	fd = fopen(udev_config_filename, "r");
 	if (fd == NULL) {
-		dbg("Can't open %s", filename);
+		dbg("Can't open %s", udev_config_filename);
 		return -ENODEV;
 	}
 
@@ -394,7 +392,6 @@ exit:
 
 static int namedev_init_permissions(void)
 {
-	char filename[255];
 	char line[255];
 	char *temp;
 	char *temp2;
@@ -402,11 +399,10 @@ static int namedev_init_permissions(void)
 	int retval = 0;
 	struct config_device dev;
 
-	strcpy(filename, UDEV_CONFIG_DIR NAMEDEV_CONFIG_PERMISSION_FILE);
-	dbg("opening %s to read as permissions config", filename);
-	fd = fopen(filename, "r");
+	dbg("opening %s to read as permissions config", udev_config_permission_filename);
+	fd = fopen(udev_config_permission_filename, "r");
 	if (fd == NULL) {
-		dbg("Can't open %s", filename);
+		dbg("Can't open %s", udev_config_permission_filename);
 		return -ENODEV;
 	}
 
diff --git a/namedev.h b/namedev.h
index 567756c82..d5aaae202 100644
--- a/namedev.h
+++ b/namedev.h
@@ -28,10 +28,7 @@
 
 struct sysfs_class_device;
 
-/* namedev config files */
 #define COMMENT_CHARACTER		'#'
-#define NAMEDEV_CONFIG_PERMISSION_FILE	"namedev.permissions"
-#define NAMEDEV_CONFIG_FILE		"namedev.config"
 
 enum config_type {
 	KERNEL_NAME	= 0,	/* must be 0 to let memset() default to this value */
diff --git a/udev-add.c b/udev-add.c
index 7906638a7..d9d7cab10 100644
--- a/udev-add.c
+++ b/udev-add.c
@@ -34,8 +34,6 @@
 #include "udevdb.h"
 #include "libsysfs/libsysfs.h"
 
-static char sysfs_path[SYSFS_PATH_MAX];
-
 /* 
  * Right now the major/minor of a device is stored in a file called
  * "dev" in sysfs.
@@ -75,7 +73,7 @@ static int create_node(struct udevice *dev)
 	char filename[255];
 	int retval = 0;
 
-	strncpy(filename, UDEV_ROOT, sizeof(filename));
+	strncpy(filename, udev_root, sizeof(filename));
 	strncat(filename, dev->name, sizeof(filename));
 
 	switch (dev->type) {
@@ -171,13 +169,6 @@ int udev_add_device(char *path, char *subsystem)
 	else
 		dev.type = 'c';
 
-	retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
-	dbg("sysfs_path = %s", sysfs_path);
-	if (retval) {
-		dbg("sysfs_get_mnt_path failed");
-		goto exit;
-	}
-
 	retval = sleep_for_dev(path);
 	if (retval)
 		goto exit;
diff --git a/udev-remove.c b/udev-remove.c
index c61a948fa..666928f31 100644
--- a/udev-remove.c
+++ b/udev-remove.c
@@ -70,7 +70,7 @@ static int delete_node(char *name)
 {
 	char filename[255];
 
-	strncpy(filename, UDEV_ROOT, sizeof(filename));
+	strncpy(filename, udev_root, sizeof(filename));
 	strncat(filename, name, sizeof(filename));
 
 	dbg("unlinking %s", filename);
diff --git a/udev.c b/udev.c
index a39847711..8d650c256 100644
--- a/udev.c
+++ b/udev.c
@@ -34,8 +34,19 @@
 #include "udevdb.h"
 #include "libsysfs/libsysfs.h"
 
+/* global variables */
+char **main_argv;
+char **main_envp;
+
+char sysfs_path[SYSFS_PATH_MAX];
+char *udev_config_dir;
+char *udev_root;
+char udev_db_filename[PATH_MAX+NAME_MAX];
+char udev_config_permission_filename[PATH_MAX+NAME_MAX];
+char udev_config_filename[PATH_MAX+NAME_MAX];
+
 
-static char *get_action(void)
+static inline char *get_action(void)
 {
 	char *action;
 
@@ -43,22 +54,60 @@ static char *get_action(void)
 	return action;
 }
 
+static inline char *get_devpath(void)
+{
+	char *devpath;
+
+	devpath = getenv("DEVPATH");
+	return devpath;
+}
 
-static char *get_device(void)
+static inline char *get_seqnum(void)
 {
-	char *device;
+	char *seqnum;
 
-	device = getenv("DEVPATH");
-	return device;
+	seqnum = getenv("SEQNUM");
+	return seqnum;
 }
 
-char **main_argv;
-char **main_envp;
+static void get_dirs(void)
+{
+	char *udev_test;
+	char *temp;
+	int retval;
+
+	udev_test = getenv("UDEV_TEST");
+	if (udev_test == NULL) {
+		/* normal operation, use the compiled in defaults */
+		udev_config_dir = UDEV_CONFIG_DIR;
+		udev_root = UDEV_ROOT;
+		retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
+		dbg("sysfs_path = %s", sysfs_path);
+		if (retval)
+			dbg("sysfs_get_mnt_path failed");
+
+	} else {
+		/* hm testing is happening, use the specified values */
+		temp = getenv("UDEV_SYSFS_PATH");
+		strncpy(sysfs_path, temp, sizeof(sysfs_path));
+		udev_config_dir = getenv("UDEV_CONFIG_DIR");
+		udev_root = getenv("UDEV_ROOT");
+	}
+
+	strncpy(udev_db_filename, udev_config_dir, sizeof(udev_db_filename));
+	strncat(udev_db_filename, UDEV_DB, sizeof(udev_db_filename));
+
+	strncpy(udev_config_filename, udev_config_dir, sizeof(udev_config_filename));
+	strncat(udev_config_filename, NAMEDEV_CONFIG_FILE, sizeof(udev_config_filename));
+	
+	strncpy(udev_config_permission_filename, udev_config_dir, sizeof(udev_config_permission_filename));
+	strncat(udev_config_permission_filename, NAMEDEV_CONFIG_PERMISSION_FILE, sizeof(udev_config_permission_filename));
+}
 
 int main(int argc, char **argv, char **envp)
 {
 	char *action;
-	char *device;
+	char *devpath;
 	char *subsystem;
 	int retval = -EINVAL;
 	
@@ -74,16 +123,16 @@ int main(int argc, char **argv, char **envp)
 
 	subsystem = argv[1];
 
-	device = get_device();
-	if (!device) {
-		dbg ("no device?");
+	devpath = get_devpath();
+	if (!devpath) {
+		dbg ("no devpath?");
 		goto exit;
 	}
-	dbg("looking at %s", device);
+	dbg("looking at %s", devpath);
 
 	/* we only care about class devices and block stuff */
-	if (!strstr(device, "class") &&
-	    !strstr(device, "block")) {
+	if (!strstr(devpath, "class") &&
+	    !strstr(devpath, "block")) {
 		dbg("not block or class");
 		goto exit;
 	}
@@ -101,6 +150,7 @@ int main(int argc, char **argv, char **envp)
 	}
 
 	/* initialize udev database */
+	get_dirs();
 	retval = udevdb_init(UDEVDB_DEFAULT);
 	if (retval != 0) {
 		dbg("Unable to initialize database.");
@@ -111,10 +161,10 @@ int main(int argc, char **argv, char **envp)
 	namedev_init();
 
 	if (strcmp(action, "add") == 0)
-		retval = udev_add_device(device, argv[1]);
+		retval = udev_add_device(devpath, subsystem);
 
 	else if (strcmp(action, "remove") == 0)
-		retval = udev_remove_device(device, argv[1]);
+		retval = udev_remove_device(devpath, subsystem);
 
 	else {
 		dbg("Unknown action: %s", action);
diff --git a/udev.h b/udev.h
index 6d7017ff5..4c8914f1e 100644
--- a/udev.h
+++ b/udev.h
@@ -24,6 +24,7 @@
 #define UDEV_H
 
 #include "libsysfs/libsysfs.h"
+#include <limits.h>
 
 #ifdef DEBUG
 #include <syslog.h>
@@ -50,7 +51,10 @@ extern int log_message (int level, const char *format, ...)
 	__attribute__ ((format (printf, 2, 3)));
 
 
-/* Lots of constants that should be in a config file sometime */
+/* filenames for the config and database files */
+#define UDEV_DB				"udevdb.tdb"
+#define NAMEDEV_CONFIG_PERMISSION_FILE	"namedev.permissions"
+#define NAMEDEV_CONFIG_FILE		"namedev.config"
 
 #define NAME_SIZE	100
 #define OWNER_SIZE	30
@@ -78,5 +82,12 @@ extern int udev_remove_device(char *path, char *subsystem);
 
 extern char **main_argv;
 extern char **main_envp;
+extern char sysfs_path[SYSFS_PATH_MAX];
+extern char *udev_config_dir;
+extern char *udev_root;
+extern char udev_db_filename[PATH_MAX+NAME_MAX];
+extern char udev_config_permission_filename[PATH_MAX+NAME_MAX];
+extern char udev_config_filename[PATH_MAX+NAME_MAX];
+
 #endif
 
diff --git a/udevdb.c b/udevdb.c
index b75bf8048..ec67a0796 100644
--- a/udevdb.c
+++ b/udevdb.c
@@ -124,12 +124,12 @@ int udevdb_init(int init_flag)
 	if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL)
 		return -EINVAL;
 
-	udevdb = tdb_open(UDEV_CONFIG_DIR UDEV_DB, 0, init_flag, O_RDWR | O_CREAT, 0644);
+	udevdb = tdb_open(udev_db_filename, 0, init_flag, O_RDWR | O_CREAT, 0644);
 	if (udevdb == NULL) {
 		if (init_flag == UDEVDB_INTERNAL)
 			dbg("Unable to initialize in-memory database");
 		else
-			dbg("Unable to initialize database at %s", UDEV_CONFIG_DIR UDEV_DB);
+			dbg("Unable to initialize database at %s", udev_db_filename);
 		return -EINVAL;
 	}
 	return 0;
diff --git a/udevdb.h b/udevdb.h
index 12f664836..9935e80e9 100644
--- a/udevdb.h
+++ b/udevdb.h
@@ -4,8 +4,6 @@
 #ifndef _UDEVDB_H_
 #define _UDEVDB_H_
 
-#define UDEV_DB		"udevdb.tdb" 
-
 /* Udevdb initialization flags */
 #define UDEVDB_DEFAULT	0	/* Defaults database to use file */
 #define UDEVDB_INTERNAL	1	/* Don't store db on disk, use in memory */