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-rw-r--r--namedev_parse.c420
1 files changed, 420 insertions, 0 deletions
diff --git a/namedev_parse.c b/namedev_parse.c
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+++ b/namedev_parse.c
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+/*
+ * 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;
+}
+
+
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