mirror of
https://github.com/systemd/systemd-stable.git
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59d6bfefce
It too big for the small tools to link against for only the log function. Signed-off-by: Kay Sievers <kay.sievers@suse.de>
268 lines
5.9 KiB
C
268 lines
5.9 KiB
C
/*
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* udev_utils.c - generic stuff used by udev
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*
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* Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
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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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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <syslog.h>
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#include <sys/utsname.h>
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#include "udev_libc_wrapper.h"
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#include "udev.h"
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#include "logging.h"
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#include "udev_utils.h"
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#include "list.h"
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/* compare string with pattern (supports * ? [0-9] [!A-Z]) */
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int strcmp_pattern(const char *p, const char *s)
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{
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if (s[0] == '\0') {
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while (p[0] == '*')
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p++;
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return (p[0] != '\0');
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}
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switch (p[0]) {
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case '[':
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{
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int not = 0;
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p++;
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if (p[0] == '!') {
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not = 1;
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p++;
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}
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while ((p[0] != '\0') && (p[0] != ']')) {
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int match = 0;
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if (p[1] == '-') {
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if ((s[0] >= p[0]) && (s[0] <= p[2]))
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match = 1;
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p += 3;
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} else {
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match = (p[0] == s[0]);
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p++;
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}
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if (match ^ not) {
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while ((p[0] != '\0') && (p[0] != ']'))
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p++;
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if (p[0] == ']')
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return strcmp_pattern(p+1, s+1);
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}
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}
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}
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break;
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case '*':
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if (strcmp_pattern(p, s+1))
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return strcmp_pattern(p+1, s);
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return 0;
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case '\0':
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if (s[0] == '\0') {
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return 0;
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}
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break;
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default:
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if ((p[0] == s[0]) || (p[0] == '?'))
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return strcmp_pattern(p+1, s+1);
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break;
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}
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return 1;
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}
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int string_is_true(const char *str)
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{
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if (strcasecmp(str, "true") == 0)
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return 1;
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if (strcasecmp(str, "yes") == 0)
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return 1;
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if (strcasecmp(str, "1") == 0)
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return 1;
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return 0;
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}
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int log_priority(const char *priority)
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{
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char *endptr;
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int prio;
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prio = strtol(priority, &endptr, 10);
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if (endptr[0] == '\0')
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return prio;
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if (strncasecmp(priority, "err", 3) == 0)
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return LOG_ERR;
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if (strcasecmp(priority, "info") == 0)
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return LOG_INFO;
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if (strcasecmp(priority, "debug") == 0)
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return LOG_DEBUG;
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if (string_is_true(priority))
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return LOG_ERR;
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return 0;
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}
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int kernel_release_satisfactory(unsigned int version, unsigned int patchlevel, unsigned int sublevel)
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{
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static unsigned int kversion = 0;
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static unsigned int kpatchlevel;
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static unsigned int ksublevel;
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if (kversion == 0) {
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struct utsname uts;
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if (uname(&uts) != 0)
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return -1;
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if (sscanf (uts.release, "%u.%u.%u", &kversion, &kpatchlevel, &ksublevel) != 3) {
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kversion = 0;
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return -1;
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}
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}
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if (kversion >= version && kpatchlevel >= patchlevel && ksublevel >= sublevel)
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return 1;
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else
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return 0;
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}
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void replace_untrusted_chars(char *string)
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{
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size_t len;
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for (len = 0; string[len] != '\0'; len++) {
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if (strchr(";,~\\()\'", string[len])) {
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info("replace '%c' in '%s'", string[len], string);
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string[len] = '_';
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}
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}
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}
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void remove_trailing_char(char *path, char c)
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{
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size_t len;
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len = strlen(path);
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while (len > 0 && path[len-1] == c)
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path[--len] = '\0';
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}
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int name_list_add(struct list_head *name_list, const char *name, int sort)
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{
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struct name_entry *loop_name;
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struct name_entry *new_name;
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list_for_each_entry(loop_name, name_list, node) {
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/* avoid doubles */
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if (strcmp(loop_name->name, name) == 0) {
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dbg("'%s' is already in the list", name);
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return 0;
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}
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}
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if (sort)
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list_for_each_entry(loop_name, name_list, node) {
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if (sort && strcmp(loop_name->name, name) > 0)
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break;
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}
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new_name = malloc(sizeof(struct name_entry));
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if (new_name == NULL) {
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dbg("error malloc");
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return -ENOMEM;
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}
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strlcpy(new_name->name, name, sizeof(new_name->name));
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dbg("adding '%s'", new_name->name);
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list_add_tail(&new_name->node, &loop_name->node);
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return 0;
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}
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int name_list_key_add(struct list_head *name_list, const char *key, const char *value)
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{
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struct name_entry *loop_name;
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struct name_entry *new_name;
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list_for_each_entry(loop_name, name_list, node) {
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if (strncmp(loop_name->name, key, strlen(key)) == 0) {
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dbg("key already present '%s', replace it", loop_name->name);
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snprintf(loop_name->name, sizeof(loop_name->name), "%s=%s", key, value);
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loop_name->name[sizeof(loop_name->name)-1] = '\0';
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return 0;
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}
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}
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new_name = malloc(sizeof(struct name_entry));
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if (new_name == NULL) {
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dbg("error malloc");
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return -ENOMEM;
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}
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snprintf(new_name->name, sizeof(new_name->name), "%s=%s", key, value);
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new_name->name[sizeof(new_name->name)-1] = '\0';
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dbg("adding '%s'", new_name->name);
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list_add_tail(&new_name->node, &loop_name->node);
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return 0;
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}
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/* calls function for every file found in specified directory */
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int add_matching_files(struct list_head *name_list, const char *dirname, const char *suffix)
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{
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struct dirent *ent;
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DIR *dir;
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char *ext;
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char filename[PATH_SIZE];
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dbg("open directory '%s'", dirname);
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dir = opendir(dirname);
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if (dir == NULL) {
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dbg("unable to open '%s'", dirname);
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return -1;
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}
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while (1) {
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ent = readdir(dir);
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if (ent == NULL || ent->d_name[0] == '\0')
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break;
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if ((ent->d_name[0] == '.') || (ent->d_name[0] == COMMENT_CHARACTER))
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continue;
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/* look for file matching with specified suffix */
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ext = strrchr(ent->d_name, '.');
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if (ext == NULL)
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continue;
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if (strcmp(ext, suffix) != 0)
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continue;
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dbg("put file '%s/%s' in list", dirname, ent->d_name);
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snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
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filename[sizeof(filename)-1] = '\0';
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name_list_add(name_list, filename, 1);
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}
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closedir(dir);
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return 0;
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}
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