X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev_config.c;h=773ee67f9e1a48abff33430ec7cc8ea95a65063f;hp=262108dff7d25a09dcbcf6062928b5552ed40df6;hb=c9b8dbfb652a10d2f1c1b122a3806c21cab87ab4;hpb=e8bacccab296d6b75c4c9f43cb4e71007aff5b8a

diff --git a/udev_config.c b/udev_config.c
index 262108dff..773ee67f9 100644
--- a/udev_config.c
+++ b/udev_config.c
@@ -3,7 +3,7 @@
  *
  * Userspace devfs
  *
- * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
  *
  *
  *	This program is free software; you can redistribute it and/or modify it
@@ -21,9 +21,6 @@
  *
  */
 
-/* define this to enable parsing debugging */
-/* #define DEBUG_PARSER */
-
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
@@ -31,165 +28,187 @@
 #include <unistd.h>
 #include <errno.h>
 #include <ctype.h>
+#include <syslog.h>
 
+#include "libsysfs/sysfs/libsysfs.h"
+#include "udev_libc_wrapper.h"
 #include "udev.h"
+#include "udev_utils.h"
 #include "udev_version.h"
-#include "namedev.h"
-#include "libsysfs/libsysfs.h"
+#include "logging.h"
 
 /* global variables */
-char sysfs_path[SYSFS_PATH_MAX];
-char udev_config_dir[PATH_MAX];
-char udev_root[PATH_MAX];
-char udev_db_filename[PATH_MAX+NAME_MAX];
-char udev_permission_filename[PATH_MAX+NAME_MAX];
-char udev_rules_filename[PATH_MAX+NAME_MAX];
-char udev_config_filename[PATH_MAX+NAME_MAX];
-char default_mode_str[NAME_MAX];
+char sysfs_path[PATH_SIZE];
+char udev_root[PATH_SIZE];
+char udev_db_path[PATH_SIZE];
+char udev_config_filename[PATH_SIZE];
+char udev_rules_filename[PATH_SIZE];
+int udev_log_priority;
+int udev_run;
+
+static int get_key(char **line, char **key, char **value)
+{
+	char *linepos;
+	char *temp;
 
+	linepos = *line;
+	if (!linepos)
+		return -1;
 
-static void init_variables(void)
-{
-	strfieldcpy(udev_root, UDEV_ROOT);
-	strfieldcpy(udev_config_dir, UDEV_CONFIG_DIR);
-}
+	/* skip whitespace */
+	while (isspace(linepos[0]))
+		linepos++;
 
-#define set_var(_name, _var)				\
-	if (strcasecmp(variable, _name) == 0) {		\
-		dbg_parse("%s = '%s'", _name, value);	\
-		strncpy(_var, value, sizeof(_var));	\
+	/* get the key */
+	*key = linepos;
+	while (1) {
+		linepos++;
+		if (linepos[0] == '\0')
+			return -1;
+		if (isspace(linepos[0]))
+			break;
+		if (linepos[0] == '=')
+			break;
 	}
 
+	/* terminate key */
+	linepos[0] = '\0';
+	linepos++;
+
+	/* skip whitespace */
+	while (isspace(linepos[0]))
+		linepos++;
+
+	/* get the value*/
+	if (linepos[0] == '"')
+		linepos++;
+	else
+		return -1;
+	*value = linepos;
+
+	temp = strchr(linepos, '"');
+	if (!temp)
+		return -1;
+	temp[0] = '\0';
+
+	return 0;
+}
+
 static int parse_config_file(void)
 {
-	char line[255];
-	char *temp;
+	char line[LINE_SIZE];
+	char *bufline;
+	char *linepos;
 	char *variable;
 	char *value;
-	FILE *fd;
-	int lineno = 0;
+	char *buf;
+	size_t bufsize;
+	size_t cur;
+	size_t count;
+	int lineno;
 	int retval = 0;
-	
-	fd = fopen(udev_config_filename, "r");
-	if (fd != NULL) {
-		dbg("reading '%s' as config file", udev_config_filename);
-	} else {
-		dbg("can't open '%s' as config file", udev_config_filename);
+
+	if (file_map(udev_config_filename, &buf, &bufsize) != 0) {
+		err("can't open '%s' as config file", udev_config_filename);
 		return -ENODEV;
 	}
 
 	/* loop through the whole file */
-	while (1) {
-		/* get a line */
-		temp = fgets(line, sizeof(line), fd);
-		if (temp == NULL)
-			goto exit;
+	lineno = 0;
+	cur = 0;
+	while (cur < bufsize) {
+		count = buf_get_line(buf, bufsize, cur);
+		bufline = &buf[cur];
+		cur += count+1;
 		lineno++;
 
-		dbg_parse("read '%s'", temp);
-
-		/* eat the whitespace at the beginning of the line */
-		while (isspace(*temp))
-			++temp;
-
-		/* empty line? */
-		if (*temp == 0x00)
+		if (count >= sizeof(line)) {
+			err("line too long, conf line skipped %s, line %d", udev_config_filename, lineno);
+			continue;
+		}
+
+		/* eat the whitespace */
+		while ((count > 0) && isspace(bufline[0])) {
+			bufline++;
+			count--;
+		}
+		if (count == 0)
 			continue;
 
 		/* see if this is a comment */
-		if (*temp == COMMENT_CHARACTER)
+		if (bufline[0] == COMMENT_CHARACTER)
 			continue;
 
-		retval = get_pair(&temp, &variable, &value);
-		if (retval)
-			break;
-		
-		dbg_parse("variable = '%s', value = '%s'", variable, value);
-
-		set_var("udev_root", udev_root);
-		set_var("udev_db", udev_db_filename);
-		set_var("udev_rules", udev_rules_filename);
-		set_var("udev_permissions", udev_permission_filename);
-		set_var("default_mode", default_mode_str);
-	}
-	dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename,
-		  lineno, temp - line, temp);
-exit:
-	fclose(fd);
-	return retval;
-}
+		strlcpy(line, bufline, count+1);
 
-static void get_dirs(void)
-{
-	char *temp;
-	char *udev_db = UDEV_DB;
-	char *udev_config = UDEV_CONFIG_FILE;
-	char *udev_rules = UDEV_RULES_FILE;
-	char *udev_permission = UDEV_PERMISSION_FILE;
-	int retval;
-
-	retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
-	if (retval)
-		dbg("sysfs_get_mnt_path failed");
-
-	/* see if we should try to override any of the default values */
-	temp = getenv("UDEV_TEST");
-	if (temp != NULL) {
-		/* hm testing is happening, use the specified values, if they are present */
-		temp = getenv("SYSFS_PATH");
-		if (temp)
-			strfieldcpy(sysfs_path, temp);
-		temp = getenv("UDEV_CONFIG_DIR");
-		if (temp)
-			strfieldcpy(udev_config_dir, temp);
-		temp = getenv("UDEV_ROOT");
-		if (temp)
-			strfieldcpy(udev_root, temp);
-		temp = getenv("UDEV_DB");
-		if (temp)
-			udev_db = temp;
-		temp = getenv("UDEV_CONFIG_FILE");
-		if (temp)
-			udev_config = temp;
-		temp = getenv("UDEV_RULES_FILE");
-		if (temp)
-			udev_rules = temp;
-		temp = getenv("UDEV_PERMISSION_FILE");
-		if (temp)
-			udev_permission = temp;
-	}
-	dbg("sysfs_path='%s'", sysfs_path);
+		linepos = line;
+		retval = get_key(&linepos, &variable, &value);
+		if (retval != 0) {
+			err("error parsing %s, line %d:%d", udev_config_filename, lineno, (int) (linepos-line));
+			continue;
+		}
 
-	strncpy(udev_db_filename, udev_root, sizeof(udev_db_filename));
-	strncat(udev_db_filename, udev_db, sizeof(udev_db_filename));
+		if (strcasecmp(variable, "udev_root") == 0) {
+			strlcpy(udev_root, value, sizeof(udev_root));
+			remove_trailing_char(udev_root, '/');
+			continue;
+		}
 
-	strncpy(udev_config_filename, udev_config_dir, sizeof(udev_config_filename));
-	strncat(udev_config_filename, udev_config, sizeof(udev_config_filename));
-	
-	strncpy(udev_rules_filename, udev_config_dir, sizeof(udev_permission_filename));
-	strncat(udev_rules_filename, udev_rules, sizeof(udev_permission_filename));
+		if (strcasecmp(variable, "udev_db") == 0) {
+			strlcpy(udev_db_path, value, sizeof(udev_db_path));
+			remove_trailing_char(udev_db_path, '/');
+			continue;
+		}
 
-	strncpy(udev_permission_filename, udev_config_dir, sizeof(udev_permission_filename));
-	strncat(udev_permission_filename, udev_permission, sizeof(udev_permission_filename));
+		if (strcasecmp(variable, "udev_rules") == 0) {
+			strlcpy(udev_rules_filename, value, sizeof(udev_rules_filename));
+			remove_trailing_char(udev_rules_filename, '/');
+			continue;
+		}
 
-	dbg_parse("udev_root = %s", udev_root);
-	dbg_parse("udev_config_filename = %s", udev_config_filename);
-	dbg_parse("udev_db_filename = %s", udev_db_filename);
-	dbg_parse("udev_rules_filename = %s", udev_rules_filename);
-	dbg_parse("udev_permission_filename = %s", udev_permission_filename);
-	parse_config_file();
+		if (strcasecmp(variable, "udev_log") == 0) {
+			udev_log_priority = log_priority(value);
+			continue;
+		}
+	}
 
-	dbg_parse("udev_root = %s", udev_root);
-	dbg_parse("udev_config_filename = %s", udev_config_filename);
-	dbg_parse("udev_db_filename = %s", udev_db_filename);
-	dbg_parse("udev_rules_filename = %s", udev_rules_filename);
-	dbg_parse("udev_permission_filename = %s", udev_permission_filename);
+	file_unmap(buf, bufsize);
+	return retval;
 }
 
 void udev_init_config(void)
 {
-	init_variables();
-	get_dirs();
-}
+	const char *env;
+
+	strcpy(udev_root, UDEV_ROOT);
+	strcpy(udev_db_path, UDEV_DB);
+	strcpy(udev_config_filename, UDEV_CONFIG_FILE);
+	strcpy(udev_rules_filename, UDEV_RULES_FILE);
+	udev_log_priority = LOG_ERR;
+	udev_run = 1;
+	sysfs_get_mnt_path(sysfs_path, sizeof(sysfs_path));
+
+	/* disable RUN key execution */
+	env = getenv("UDEV_RUN");
+	if (env && !string_is_true(env))
+		udev_run = 0;
+
+	env = getenv("UDEV_CONFIG_FILE");
+	if (env) {
+		strlcpy(udev_config_filename, env, sizeof(udev_config_filename));
+		remove_trailing_char(udev_config_filename, '/');
+	}
+
+	parse_config_file();
 
+	env = getenv("UDEV_LOG");
+	if (env)
+		udev_log_priority = log_priority(env);
 
+	dbg("sysfs_path='%s'", sysfs_path);
+	dbg("UDEV_CONFIG_FILE='%s'", udev_config_filename);
+	dbg("udev_root='%s'", udev_root);
+	dbg("udev_db='%s'", udev_db_path);
+	dbg("udev_rules='%s'", udev_rules_filename);
+	dbg("udev_log=%d", udev_log_priority);
+}