From 19feb35100f602d2e9e4148d9e22548dae5a01d3 Mon Sep 17 00:00:00 2001 From: "greg@kroah.com" Date: Tue, 2 Dec 2003 18:38:30 -0800 Subject: [PATCH] split out the namedev config parsing logic to namedev_parse.c --- namedev_parse.c | 420 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 420 insertions(+) create mode 100644 namedev_parse.c (limited to 'namedev_parse.c') 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 + * + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +#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; +} + + -- cgit v1.2.3-54-g00ecf