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On Thu, Mar 25, 2004 at 02:52:13AM +0100, Kay Sievers wrote: > Please have look if it still works for you, I only did a very quick > test. Here is a unified version, with all the functions moved to udev_lib.c. We have a generic function now, to call a given fnct(char *) for every file ending with a specific suffix, sorted in lexical order. We use it to execute the dev.d/ files and read our rules.d/ files. The binary should be a bit smaller now. I've also changed it, to not do the dev.d/ exec for net devices.
439 lines
9.5 KiB
C
439 lines
9.5 KiB
C
/*
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* namedev_parse.c
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*
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* Userspace devfs
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*
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* Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifdef DEBUG
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/* define this to enable parsing debugging also */
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/* #define DEBUG_PARSER */
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#endif
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include "udev.h"
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#include "udev_lib.h"
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#include "logging.h"
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#include "namedev.h"
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static int add_config_dev(struct config_device *new_dev)
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{
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struct config_device *tmp_dev;
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tmp_dev = malloc(sizeof(*tmp_dev));
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if (tmp_dev == NULL)
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return -ENOMEM;
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memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
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list_add_tail(&tmp_dev->node, &config_device_list);
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//dump_config_dev(tmp_dev);
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return 0;
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}
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void dump_config_dev(struct config_device *dev)
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{
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dbg_parse("name='%s', symlink='%s', bus='%s', place='%s', id='%s', "
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"sysfs_file[0]='%s', sysfs_value[0]='%s', "
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"kernel='%s', program='%s', result='%s'",
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"owner='%s', group='%s', mode=%#o",
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dev->name, dev->symlink, dev->bus, dev->place, dev->id,
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dev->sysfs_pair[0].file, dev->sysfs_pair[0].value,
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dev->kernel, dev->program, dev->result,
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dev->owner, dev->group, dev->mode);
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}
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void dump_config_dev_list(void)
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{
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struct config_device *dev;
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list_for_each_entry(dev, &config_device_list, node)
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dump_config_dev(dev);
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}
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static int add_perm_dev(struct perm_device *new_dev)
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{
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struct perm_device *dev;
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struct perm_device *tmp_dev;
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/* update the values if we already have the device */
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list_for_each_entry(dev, &perm_device_list, node) {
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if (strcmp(new_dev->name, dev->name) != 0)
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continue;
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set_empty_perms(dev, new_dev->mode, new_dev->owner, new_dev->group);
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return 0;
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}
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/* not found, add new structure to the perm list */
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tmp_dev = malloc(sizeof(*tmp_dev));
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if (!tmp_dev)
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return -ENOMEM;
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memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
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list_add_tail(&tmp_dev->node, &perm_device_list);
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//dump_perm_dev(tmp_dev);
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return 0;
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}
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void dump_perm_dev(struct perm_device *dev)
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{
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dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
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dev->name, dev->owner, dev->group, dev->mode);
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}
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void dump_perm_dev_list(void)
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{
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struct perm_device *dev;
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list_for_each_entry(dev, &perm_device_list, node)
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dump_perm_dev(dev);
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}
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/* extract possible KEY{attr} or KEY_attr */
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static char *get_key_attribute(char *str)
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{
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char *pos;
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char *attr;
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attr = strchr(str, '{');
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if (attr != NULL) {
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attr++;
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pos = strchr(attr, '}');
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if (pos == NULL) {
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dbg("missing closing brace for format");
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return NULL;
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}
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pos[0] = '\0';
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dbg("attribute='%s'", attr);
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return attr;
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}
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attr = strchr(str, '_');
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if (attr != NULL) {
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attr++;
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dbg("attribute='%s'", attr);
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return attr;
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}
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return NULL;
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}
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static int namedev_parse_rules(char *filename)
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{
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char line[255];
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int lineno;
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char *temp;
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char *temp2;
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char *temp3;
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char *attr;
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char *buf;
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size_t bufsize;
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size_t cur;
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size_t count;
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int program_given = 0;
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int retval = 0;
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struct config_device dev;
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if (file_map(filename, &buf, &bufsize) == 0) {
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dbg("reading '%s' as rules file", filename);
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} else {
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dbg("can't open '%s' as rules file", filename);
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return -1;
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}
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/* loop through the whole file */
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cur = 0;
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lineno = 0;
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while (1) {
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count = buf_get_line(buf, bufsize, cur);
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strncpy(line, buf + cur, count);
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line[count] = '\0';
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temp = line;
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lineno++;
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cur += count+1;
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if (cur > bufsize)
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break;
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dbg_parse("read '%s'", temp);
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/* eat the whitespace */
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while (isspace(*temp))
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++temp;
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/* empty line? */
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if ((*temp == '\0') || (*temp == '\n'))
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continue;
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/* see if this is a comment */
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if (*temp == COMMENT_CHARACTER)
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continue;
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memset(&dev, 0x00, sizeof(struct config_device));
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/* get all known keys */
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while (1) {
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retval = parse_get_pair(&temp, &temp2, &temp3);
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if (retval)
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break;
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if (strcasecmp(temp2, FIELD_BUS) == 0) {
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strfieldcpy(dev.bus, temp3);
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continue;
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}
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if (strcasecmp(temp2, FIELD_ID) == 0) {
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strfieldcpy(dev.id, temp3);
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continue;
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}
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if (strcasecmp(temp2, FIELD_PLACE) == 0) {
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strfieldcpy(dev.place, temp3);
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continue;
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}
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if (strncasecmp(temp2, FIELD_SYSFS, sizeof(FIELD_SYSFS)-1) == 0) {
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struct sysfs_pair *pair = &dev.sysfs_pair[0];
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int sysfs_pair_num = 0;
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/* find first unused pair */
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while (pair->file[0] != '\0') {
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++sysfs_pair_num;
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if (sysfs_pair_num >= MAX_SYSFS_PAIRS) {
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pair = NULL;
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break;
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}
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++pair;
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}
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if (pair) {
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attr = get_key_attribute(temp2 + sizeof(FIELD_SYSFS)-1);
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if (attr == NULL) {
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dbg("error parsing " FIELD_SYSFS " attribute");
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continue;
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}
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strfieldcpy(pair->file, attr);
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strfieldcpy(pair->value, temp3);
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}
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continue;
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}
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if (strcasecmp(temp2, FIELD_KERNEL) == 0) {
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strfieldcpy(dev.kernel, temp3);
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continue;
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}
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if (strcasecmp(temp2, FIELD_PROGRAM) == 0) {
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program_given = 1;
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strfieldcpy(dev.program, temp3);
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continue;
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}
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if (strcasecmp(temp2, FIELD_RESULT) == 0) {
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strfieldcpy(dev.result, temp3);
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continue;
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}
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if (strncasecmp(temp2, FIELD_NAME, sizeof(FIELD_NAME)-1) == 0) {
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attr = get_key_attribute(temp2 + sizeof(FIELD_NAME)-1);
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if (attr != NULL)
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if (strcasecmp(attr, ATTR_PARTITIONS) == 0) {
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dbg_parse("creation of partition nodes requested");
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dev.partitions = PARTITIONS_COUNT;
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}
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strfieldcpy(dev.name, temp3);
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continue;
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}
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if (strcasecmp(temp2, FIELD_SYMLINK) == 0) {
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strfieldcpy(dev.symlink, temp3);
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continue;
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}
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if (strcasecmp(temp2, FIELD_OWNER) == 0) {
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strfieldcpy(dev.owner, temp3);
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continue;
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}
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if (strcasecmp(temp2, FIELD_GROUP) == 0) {
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strfieldcpy(dev.group, temp3);
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continue;
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}
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if (strcasecmp(temp2, FIELD_MODE) == 0) {
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dev.mode = strtol(temp3, NULL, 8);
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continue;
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}
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dbg("unknown type of field '%s'", temp2);
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goto error;
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}
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/* simple plausibility checks for given keys */
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if ((dev.sysfs_pair[0].file[0] == '\0') ^
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(dev.sysfs_pair[0].value[0] == '\0')) {
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dbg("inconsistency in " FIELD_SYSFS " key");
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goto error;
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}
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if ((dev.result[0] != '\0') && (program_given == 0)) {
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dbg(FIELD_RESULT " is only useful when "
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FIELD_PROGRAM " is called in any rule before");
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goto error;
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}
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dev.config_line = lineno;
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strfieldcpy(dev.config_file, filename);
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retval = add_config_dev(&dev);
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if (retval) {
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dbg("add_config_dev returned with error %d", retval);
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continue;
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error:
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dbg("%s:%d:%d: parse error, rule skipped",
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filename, lineno, temp - line);
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}
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}
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file_unmap(buf, bufsize);
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return retval;
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}
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static int namedev_parse_permissions(char *filename)
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{
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char line[255];
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char *temp;
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char *temp2;
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char *buf;
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size_t bufsize;
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size_t cur;
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size_t count;
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int retval = 0;
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struct perm_device dev;
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if (file_map(filename, &buf, &bufsize) == 0) {
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dbg("reading '%s' as permissions file", filename);
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} else {
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dbg("can't open '%s' as permissions file", filename);
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return -1;
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}
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/* loop through the whole file */
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cur = 0;
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while (1) {
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count = buf_get_line(buf, bufsize, cur);
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strncpy(line, buf + cur, count);
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line[count] = '\0';
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temp = line;
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cur += count+1;
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if (cur > bufsize)
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break;
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dbg_parse("read '%s'", temp);
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/* eat the whitespace at the beginning of the line */
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while (isspace(*temp))
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++temp;
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/* empty line? */
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if ((*temp == '\0') || (*temp == '\n'))
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continue;
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/* see if this is a comment */
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if (*temp == COMMENT_CHARACTER)
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continue;
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memset(&dev, 0x00, sizeof(dev));
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/* parse the line */
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temp2 = strsep(&temp, ":");
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if (!temp2) {
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dbg("cannot parse line '%s'", line);
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continue;
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}
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strfieldcpy(dev.name, temp2);
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temp2 = strsep(&temp, ":");
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if (!temp2) {
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dbg("cannot parse line '%s'", line);
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continue;
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}
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strfieldcpy(dev.owner, temp2);
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temp2 = strsep(&temp, ":");
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if (!temp2) {
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dbg("cannot parse line '%s'", line);
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continue;
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}
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strfieldcpy(dev.group, temp2);
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if (!temp) {
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dbg("cannot parse line '%s'", line);
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continue;
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}
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dev.mode = strtol(temp, NULL, 8);
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dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
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dev.name, dev.owner, dev.group, dev.mode);
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retval = add_perm_dev(&dev);
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if (retval) {
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dbg("add_perm_dev returned with error %d", retval);
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goto exit;
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}
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}
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exit:
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file_unmap(buf, bufsize);
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return retval;
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}
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int namedev_init_rules()
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{
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struct stat stats;
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stat(udev_rules_filename, &stats);
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if ((stats.st_mode & S_IFMT) != S_IFDIR)
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return namedev_parse_rules(udev_rules_filename);
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else
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return call_foreach_file(namedev_parse_rules,
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udev_rules_filename, RULEFILE_SUFFIX);
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}
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int namedev_init_permissions()
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{
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struct stat stats;
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stat(udev_permissions_filename, &stats);
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if ((stats.st_mode & S_IFMT) != S_IFDIR)
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return namedev_parse_permissions(udev_permissions_filename);
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else
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return call_foreach_file(namedev_parse_permissions,
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udev_permissions_filename, PERMFILE_SUFFIX);
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}
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