[PATCH] make the udev object available to more processing stages

Remove the overwriting of main_argv[] hack and use the values
from the udev object.
  
Pass the udev object to call_foreach_file().
  
In the udevstart case, export SUBSYSTEM and UDEVSTART to the
environment.

10 files changed, 42 insertions, 66 deletions

diff --git a/dev_d.c b/dev_d.c
index 6e35f55ca2..1108c8cee4 100644
--- a/dev_d.c
+++ b/dev_d.c
@@ -35,13 +35,13 @@
 #define DEVD_DIR			"/etc/dev.d/"
 #define DEVD_SUFFIX			".dev"
 
-static int run_program(char *name)
+static int run_program(const char *filename, void *data)
 {
 	pid_t pid;
 	int fd;
-	char *argv[3];
+	struct udevice *udev = data;
 
-	dbg("running %s", name);
+	dbg("running %s", filename);
 
 	pid = fork();
 	switch (pid) {
@@ -55,11 +55,7 @@ static int run_program(char *name)
 		}
 		close(fd);
 
-		argv[0] = name;
-		argv[1] = main_argv[1];
-		argv[2] = NULL;
-
-		execv(name, argv);
+		execl(filename, filename, udev->subsystem, NULL);
 		dbg("exec of child failed");
 		_exit(1);
 	case -1:
@@ -105,7 +101,7 @@ void dev_d_execute(struct udevice *udev)
 		temp[0] = '\0';
 		strcpy(dirname, DEVD_DIR);
 		strfieldcat(dirname, devname);
-		call_foreach_file(run_program, dirname, DEVD_SUFFIX);
+		call_foreach_file(run_program, dirname, DEVD_SUFFIX, udev);
 
 		temp[0] = '/';
 		++temp;
@@ -114,12 +110,12 @@ void dev_d_execute(struct udevice *udev)
 
 	strcpy(dirname, DEVD_DIR);
 	strfieldcat(dirname, udev->name);
-	call_foreach_file(run_program, dirname, DEVD_SUFFIX);
+	call_foreach_file(run_program, dirname, DEVD_SUFFIX, udev);
 
 	strcpy(dirname, DEVD_DIR);
 	strfieldcat(dirname, udev->subsystem);
-	call_foreach_file(run_program, dirname, DEVD_SUFFIX);
+	call_foreach_file(run_program, dirname, DEVD_SUFFIX, udev);
 
 	strcpy(dirname, DEVD_DIR "default");
-	call_foreach_file(run_program, dirname, DEVD_SUFFIX);
+	call_foreach_file(run_program, dirname, DEVD_SUFFIX, udev);
 }
diff --git a/namedev.c b/namedev.c
index d63e36e18a..268a3d5be6 100644
--- a/namedev.c
+++ b/namedev.c
@@ -358,7 +358,7 @@ static void fix_kernel_name(struct udevice *udev)
 	}
 }
 
-static int execute_program(const char *path, char *value, int len)
+static int execute_program(struct udevice *udev, const char *path, char *value, int len)
 {
 	int retval;
 	int count;
@@ -391,7 +391,7 @@ static int execute_program(const char *path, char *value, int len)
 		dbg("execute '%s' with parsed arguments", arg);
 	} else {
 		argv[0] = arg;
-		argv[1] = main_argv[1];
+		argv[1] = udev->subsystem;
 		argv[2] = NULL;
 		dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]);
 	}
@@ -655,7 +655,7 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas
 			dbg("check " FIELD_PROGRAM);
 			strfieldcpy(program, dev->program);
 			apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
-			if (execute_program(program, udev->program_result, NAME_SIZE) != 0) {
+			if (execute_program(udev, program, udev->program_result, NAME_SIZE) != 0) {
 				dbg(FIELD_PROGRAM " returned nonzero");
 				goto try_parent;
 			} else {
diff --git a/namedev_parse.c b/namedev_parse.c
index 22e3523f3d..73828a83b2 100644
--- a/namedev_parse.c
+++ b/namedev_parse.c
@@ -142,7 +142,7 @@ static char *get_key_attribute(char *str)
 	return NULL;
 }
 
-static int namedev_parse_rules(char *filename)
+static int namedev_parse_rules(const char *filename, void *data)
 {
 	char line[LINE_SIZE];
 	char *bufline;
@@ -343,7 +343,7 @@ error:
 	return retval;
 }
 
-static int namedev_parse_permissions(char *filename)
+static int namedev_parse_permissions(const char *filename, void *data)
 {
 	char line[LINE_SIZE];
 	char *bufline;
@@ -447,10 +447,10 @@ int namedev_init_rules(void)
 
 	stat(udev_rules_filename, &stats);
 	if ((stats.st_mode & S_IFMT) != S_IFDIR)
-		return namedev_parse_rules(udev_rules_filename);
+		return namedev_parse_rules(udev_rules_filename, NULL);
 	else
-		return call_foreach_file(namedev_parse_rules,
-					 udev_rules_filename, RULEFILE_SUFFIX);
+		return call_foreach_file(namedev_parse_rules, udev_rules_filename,
+					 RULEFILE_SUFFIX, NULL);
 }
 
 int namedev_init_permissions(void)
@@ -459,8 +459,8 @@ int namedev_init_permissions(void)
 
 	stat(udev_permissions_filename, &stats);
 	if ((stats.st_mode & S_IFMT) != S_IFDIR)
-		return namedev_parse_permissions(udev_permissions_filename);
+		return namedev_parse_permissions(udev_permissions_filename, NULL);
 	else
-		return call_foreach_file(namedev_parse_permissions,
-					 udev_permissions_filename, PERMFILE_SUFFIX);
+		return call_foreach_file(namedev_parse_permissions, udev_permissions_filename,
+					 PERMFILE_SUFFIX, NULL);
 }
diff --git a/udev.c b/udev.c
index 480a1cdca2..300e85ceb0 100644
--- a/udev.c
+++ b/udev.c
@@ -39,10 +39,6 @@
 #include "udevdb.h"
 
 
-/* global variables */
-char **main_argv;
-char **main_envp;
-
 #ifdef LOG
 unsigned char logname[LOGNAME_SIZE];
 void log_message(int level, const char *format, ...)
@@ -83,12 +79,7 @@ int main(int argc, char *argv[], char *envp[])
 	} act_type;
 
 	dbg("version %s", UDEV_VERSION);
-
-	main_argv = argv;
-	main_envp = envp;
-
 	logging_init("udev");
-
 	udev_init_config();
 
 	if (strstr(argv[0], "udevstart") || (argv[1] != NULL && strstr(argv[1], "udevstart"))) {
diff --git a/udev.h b/udev.h
index 3f9f2c8612..d031b9699c 100644
--- a/udev.h
+++ b/udev.h
@@ -73,8 +73,6 @@ extern int udev_start(void);
 extern int parse_get_pair(char **orig_string, char **left, char **right);
 extern void dev_d_execute(struct udevice *udev);
 
-extern char **main_argv;
-extern char **main_envp;
 extern char sysfs_path[SYSFS_PATH_MAX];
 extern char udev_root[PATH_MAX];
 extern char udev_db_path[PATH_MAX+NAME_MAX];
diff --git a/udev_lib.c b/udev_lib.c
index 84daf9fd19..012d60b0ea 100644
--- a/udev_lib.c
+++ b/udev_lib.c
@@ -178,12 +178,12 @@ static int file_list_insert(char *filename, struct list_head *file_list)
 }
 
 /* calls function for every file found in specified directory */
-int call_foreach_file(int fnct(char *f) , char *dirname, char *suffix)
+int call_foreach_file(file_fnct_t fnct, const char *dirname,
+		      const char *suffix, void *data)
 {
 	struct dirent *ent;
 	DIR *dir;
 	char *ext;
-	char file[NAME_SIZE];
 	struct files *loop_file;
 	struct files *tmp_file;
 	LIST_HEAD(file_list);
@@ -217,10 +217,12 @@ int call_foreach_file(int fnct(char *f) , char *dirname, char *suffix)
 
 	/* call function for every file in the list */
 	list_for_each_entry_safe(loop_file, tmp_file, &file_list, list) {
-		snprintf(file, NAME_SIZE-1, "%s/%s", dirname, loop_file->name);
-		file[NAME_SIZE-1] = '\0';
+		char filename[NAME_SIZE];
 
-		fnct(file);
+		snprintf(filename, NAME_SIZE-1, "%s/%s", dirname, loop_file->name);
+		filename[NAME_SIZE-1] = '\0';
+
+		fnct(filename, data);
 
 		list_del(&loop_file->list);
 		free(loop_file);
diff --git a/udev_lib.h b/udev_lib.h
index 3777a7caa3..2bc9ba82ab 100644
--- a/udev_lib.h
+++ b/udev_lib.h
@@ -84,6 +84,9 @@ extern int file_map(const char *filename, char **buf, size_t *bufsize);
 extern void file_unmap(char *buf, size_t bufsize);
 extern size_t buf_get_line(char *buf, size_t buflen, size_t cur);
 extern void no_trailing_slash(char *path);
-extern int  call_foreach_file(int fnct(char *f) , char *filename, char *extension);
+
+typedef int (*file_fnct_t)(const char *filename, void *data);
+extern int  call_foreach_file(file_fnct_t fnct, const char *dirname,
+			      const char *suffix, void *data);
 
 #endif
diff --git a/udevinfo.c b/udevinfo.c
index 290a09e880..1148272743 100644
--- a/udevinfo.c
+++ b/udevinfo.c
@@ -36,10 +36,7 @@
 #include "udevdb.h"
 
 
-# define SYSFS_VALUE_MAX 200
-
-char **main_argv;
-int main_argc;
+#define SYSFS_VALUE_SIZE		256
 
 #ifdef LOG
 unsigned char logname[LOGNAME_SIZE];
@@ -58,7 +55,7 @@ static int print_all_attributes(const char *path)
 	struct dlist *attributes;
 	struct sysfs_attribute *attr;
 	struct sysfs_directory *sysfs_dir;
-	char value[SYSFS_VALUE_MAX];
+	char value[SYSFS_VALUE_SIZE];
 	int len;
 	int retval = 0;
 
@@ -257,7 +254,7 @@ static int print_sysfs_devices(void)
 	return 0;
 }
 
-static int process_options(void)
+static int process_options(int argc, char *argv[])
 {
 	static const char short_options[] = "adn:p:q:rsVh";
 	int option;
@@ -274,7 +271,7 @@ static int process_options(void)
 
 	/* get command line options */
 	while (1) {
-		option = getopt(main_argc, main_argv, short_options);
+		option = getopt(argc, argv, short_options);
 		if (option == -1)
 			break;
 
@@ -479,15 +476,12 @@ int main(int argc, char *argv[], char *envp[])
 {
 	int rc = 0;
 
-	main_argv = argv;
-	main_argc = argc;
-
 	logging_init("udevinfo");
 
 	/* initialize our configuration */
 	udev_init_config();
 
-	rc = process_options();
+	rc = process_options(argc, argv);
 
 	logging_close();
 	exit(rc);
diff --git a/udevstart.c b/udevstart.c
index e05680aa93..0433e568d4 100644
--- a/udevstart.c
+++ b/udevstart.c
@@ -92,16 +92,10 @@ static int add_device(char *devpath, char *subsystem)
 	struct udevice udev;
 	char path[SYSFS_PATH_MAX];
 	struct sysfs_class_device *class_dev;
-	char *argv[3];
 
-	/* fake argument vector and environment for callouts and dev.d/ */
-	argv[0] = "udev";
-	argv[1] = subsystem;
-	argv[2] = NULL;
-
-	main_argv = argv;
+	/* set environment for callouts and dev.d/ */
 	setenv("DEVPATH", devpath, 1);
-	setenv("ACTION", "add", 1);
+	setenv("SUBSYSTEM", subsystem, 1);
 
 	snprintf(path, SYSFS_PATH_MAX-1, "%s%s", sysfs_path, devpath);
 	class_dev = sysfs_open_class_device_path(path);
@@ -291,7 +285,12 @@ static void udev_scan_class(void)
 
 int udev_start(void)
 {
+	/* set environment for callouts and dev.d/ */
+	setenv("ACTION", "add", 1);
+	setenv("UDEVSTART", "1", 1);
+
 	udev_scan_class();
 	udev_scan_block();
+
 	return 0;
 }
diff --git a/udevtest.c b/udevtest.c
index e67af0df67..14c511584b 100644
--- a/udevtest.c
+++ b/udevtest.c
@@ -34,10 +34,6 @@
 #include "logging.h"
 #include "namedev.h"
 
-/* global variables */
-char **main_argv;
-char **main_envp;
-
 
 #ifdef LOG
 unsigned char logname[LOGNAME_SIZE];
@@ -62,9 +58,6 @@ int main(int argc, char *argv[], char *envp[])
 	char *subsystem = "";
 	struct udevice udev;
 
-	main_argv = argv;
-	main_envp = envp;
-
 	info("version %s", UDEV_VERSION);
 
 	if (argv[1] == NULL) {