[PATCH] split out the namedev config parsing logic to namedev_parse.c

1 files changed, 420 insertions, 0 deletions

diff --git a/namedev_parse.c b/namedev_parse.c
new file mode 100644
index 0000000000..a752b33050
--- /dev/null
+++ b/namedev_parse.c
@@ -0,0 +1,420 @@
+/*
+ * namedev_parse.c
+ *
+ * Userspace devfs
+ *
+ * Copyright (C) 2003 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.
+ * 
+ *	This program is distributed in the hope that it will be useful, but
+ *	WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *	General Public License for more details.
+ * 
+ *	You should have received a copy of the GNU General Public License along
+ *	with this program; if not, write to the Free Software Foundation, Inc.,
+ *	675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/* define this to enable parsing debugging */
+/* #define DEBUG_PARSER */
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "udev.h"
+#include "namedev.h"
+
+static int get_pair(char **orig_string, char **left, char **right)
+{
+	char *temp;
+	char *string = *orig_string;
+
+	if (!string)
+		return -ENODEV;
+
+	/* eat any whitespace */
+	while (isspace(*string))
+		++string;
+
+	/* split based on '=' */
+	temp = strsep(&string, "=");
+	*left = temp;
+	if (!string)
+		return -ENODEV;
+
+	/* take the right side and strip off the '"' */
+	while (isspace(*string))
+		++string;
+	if (*string == '"')
+		++string;
+	else
+		return -ENODEV;
+
+	temp = strsep(&string, "\"");
+	if (!string || *temp == '\0')
+		return -ENODEV;
+	*right = temp;
+	*orig_string = string;
+	
+	return 0;
+}
+
+static int get_value(const char *left, char **orig_string, char **ret_string)
+{
+	int retval;
+	char *left_string;
+
+	retval = get_pair(orig_string, &left_string, ret_string);
+	if (retval)
+		return retval;
+	if (strcasecmp(left_string, left) != 0)
+		return -ENODEV;
+	return 0;
+}
+
+void dump_config_dev(struct config_device *dev)
+{
+	switch (dev->type) {
+	case KERNEL_NAME:
+		dbg_parse("KERNEL name='%s' ,"
+			  "owner='%s', group='%s', mode=%#o",
+			  dev->name, dev->owner, dev->group, dev->mode);
+		break;
+	case LABEL:
+		dbg_parse("LABEL name='%s', bus='%s', sysfs_file='%s', sysfs_value='%s', "
+			  "owner='%s', group='%s', mode=%#o",
+			  dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value,
+			  dev->owner, dev->group, dev->mode);
+		break;
+	case NUMBER:
+		dbg_parse("NUMBER name='%s', bus='%s', id='%s', "
+			  "owner='%s', group='%s', mode=%#o",
+			  dev->name, dev->bus, dev->id,
+			  dev->owner, dev->group, dev->mode);
+		break;
+	case TOPOLOGY:
+		dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s', "
+			  "owner='%s', group='%s', mode=%#o",
+			  dev->name, dev->bus, dev->place,
+			  dev->owner, dev->group, dev->mode);
+		break;
+	case REPLACE:
+		dbg_parse("REPLACE name=%s, kernel_name=%s, "
+			  "owner='%s', group='%s', mode=%#o",
+			  dev->name, dev->kernel_name,
+			  dev->owner, dev->group, dev->mode);
+		break;
+	case CALLOUT:
+		dbg_parse("CALLOUT name='%s', bus='%s', program='%s', id='%s', "
+			  "owner='%s', group='%s', mode=%#o",
+			  dev->name, dev->bus, dev->exec_program, dev->id,
+			  dev->owner, dev->group, dev->mode);
+		break;
+	default:
+		dbg_parse("unknown type of method");
+	}
+}
+
+void dump_config_dev_list(void)
+{
+	struct list_head *tmp;
+
+	list_for_each(tmp, &config_device_list) {
+		struct config_device *dev = list_entry(tmp, struct config_device, node);
+		dump_config_dev(dev);
+	}
+}
+	
+int namedev_init_config(void)
+{
+	char line[255];
+	int lineno;
+	char *temp;
+	char *temp2;
+	char *temp3;
+	FILE *fd;
+	int retval = 0;
+	struct config_device dev;
+
+	dbg("opening '%s' to read as config", udev_config_filename);
+	fd = fopen(udev_config_filename, "r");
+	if (fd == NULL) {
+		dbg("can't open '%s'", udev_config_filename);
+		return -ENODEV;
+	}
+
+	/* loop through the whole file */
+	lineno = 0;
+	while (1) {
+		/* get a line */
+		temp = fgets(line, sizeof(line), fd);
+		if (temp == NULL)
+			goto exit;
+		lineno++;
+
+		dbg_parse("read '%s'", temp);
+
+		/* eat the whitespace at the beginning of the line */
+		while (isspace(*temp))
+			++temp;
+
+		/* empty line? */
+		if (*temp == 0x00)
+			continue;
+
+		/* see if this is a comment */
+		if (*temp == COMMENT_CHARACTER)
+			continue;
+
+		memset(&dev, 0x00, sizeof(struct config_device));
+
+		/* parse the line */
+		temp2 = strsep(&temp, ",");
+		if (strcasecmp(temp2, TYPE_LABEL) == 0) {
+			/* label type */
+			dev.type = LABEL;
+
+			/* BUS="bus" */
+			retval = get_value("BUS", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.bus, temp3);
+
+			/* file="value" */
+			temp2 = strsep(&temp, ",");
+			retval = get_pair(&temp, &temp2, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.sysfs_file, temp2);
+			strfieldcpy(dev.sysfs_value, temp3);
+
+			/* NAME="new_name" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("NAME", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.name, temp3);
+
+			dbg_parse("LABEL name='%s', bus='%s', "
+				  "sysfs_file='%s', sysfs_value='%s'",
+				  dev.name, dev.bus, dev.sysfs_file,
+				  dev.sysfs_value);
+		}
+
+		if (strcasecmp(temp2, TYPE_NUMBER) == 0) {
+			/* number type */
+			dev.type = NUMBER;
+
+			/* BUS="bus" */
+			retval = get_value("BUS", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.bus, temp3);
+
+			/* ID="id" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("ID", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.id, temp3);
+
+			/* NAME="new_name" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("NAME", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.name, temp3);
+
+			dbg_parse("NUMBER name='%s', bus='%s', id='%s'",
+				  dev.name, dev.bus, dev.id);
+		}
+
+		if (strcasecmp(temp2, TYPE_TOPOLOGY) == 0) {
+			/* number type */
+			dev.type = TOPOLOGY;
+
+			/* BUS="bus" */
+			retval = get_value("BUS", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.bus, temp3);
+
+			/* PLACE="place" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("PLACE", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.place, temp3);
+
+			/* NAME="new_name" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("NAME", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.name, temp3);
+
+			dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s'",
+				  dev.name, dev.bus, dev.place);
+		}
+
+		if (strcasecmp(temp2, TYPE_REPLACE) == 0) {
+			/* number type */
+			dev.type = REPLACE;
+
+			/* KERNEL="kernel_name" */
+			retval = get_value("KERNEL", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.kernel_name, temp3);
+
+			/* NAME="new_name" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("NAME", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.name, temp3);
+			dbg_parse("REPLACE name='%s', kernel_name='%s'",
+				  dev.name, dev.kernel_name);
+		}
+		if (strcasecmp(temp2, TYPE_CALLOUT) == 0) {
+			/* number type */
+			dev.type = CALLOUT;
+
+			/* BUS="bus" */
+			retval = get_value("BUS", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.bus, temp3);
+
+			/* PROGRAM="executable" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("PROGRAM", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.exec_program, temp3);
+
+			/* ID="id" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("ID", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.id, temp3);
+
+			/* NAME="new_name" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("NAME", &temp, &temp3);
+			if (retval)
+				break;
+			strfieldcpy(dev.name, temp3);
+			dbg_parse("CALLOUT name='%s', program='%s'",
+				  dev.name, dev.exec_program);
+		}
+
+		retval = add_config_dev(&dev);
+		if (retval) {
+			dbg("add_config_dev returned with error %d", retval);
+			goto exit;
+		}
+	}
+	dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename,
+		  lineno, temp - line, temp);
+exit:
+	fclose(fd);
+	return retval;
+}	
+
+
+int namedev_init_permissions(void)
+{
+	char line[255];
+	char *temp;
+	char *temp2;
+	FILE *fd;
+	int retval = 0;
+	struct config_device dev;
+
+	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'", udev_config_permission_filename);
+		return -ENODEV;
+	}
+
+	/* loop through the whole file */
+	while (1) {
+		temp = fgets(line, sizeof(line), fd);
+		if (temp == NULL)
+			break;
+
+		dbg_parse("read '%s'", temp);
+
+		/* eat the whitespace at the beginning of the line */
+		while (isspace(*temp))
+			++temp;
+
+		/* empty line? */
+		if (*temp == 0x00)
+			continue;
+
+		/* see if this is a comment */
+		if (*temp == COMMENT_CHARACTER)
+			continue;
+
+		memset(&dev, 0x00, sizeof(dev));
+
+		/* parse the line */
+		temp2 = strsep(&temp, ":");
+		if (!temp2) {
+			dbg("cannot parse line '%s'", line);
+			continue;
+		}
+		strncpy(dev.name, temp2, sizeof(dev.name));
+
+		temp2 = strsep(&temp, ":");
+		if (!temp2) {
+			dbg("cannot parse line '%s'", line);
+			continue;
+		}
+		strncpy(dev.owner, temp2, sizeof(dev.owner));
+
+		temp2 = strsep(&temp, ":");
+		if (!temp2) {
+			dbg("cannot parse line '%s'", line);
+			continue;
+		}
+		strncpy(dev.group, temp2, sizeof(dev.owner));
+
+		if (!temp) {
+			dbg("cannot parse line: %s", line);
+			continue;
+		}
+		dev.mode = strtol(temp, NULL, 8);
+
+		dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
+			  dev.name, dev.owner, dev.group,
+			  dev.mode);
+		retval = add_config_dev(&dev);
+		if (retval) {
+			dbg("add_config_dev returned with error %d", retval);
+			goto exit;
+		}
+	}
+
+exit:
+	fclose(fd);
+	return retval;
+}	
+
+