-/***
- This file is part of systemd.
-
- Copyright 2008-2012 Kay Sievers <kay@vrfy.org>
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <ctype.h>
#include <errno.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "libudev.h"
+#include "sd-device.h"
-#include "MurmurHash2.h"
#include "device-nodes.h"
-#include "libudev-private.h"
-#include "syslog-util.h"
+#include "libudev-util.h"
+#include "string-util.h"
+#include "strxcpyx.h"
#include "utf8.h"
/**
*/
/* handle "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */
-int util_resolve_subsys_kernel(struct udev *udev, const char *string,
- char *result, size_t maxsize, int read_value)
-{
- char temp[UTIL_PATH_SIZE];
- char *subsys;
- char *sysname;
- struct udev_device *dev;
- char *attr;
+int util_resolve_subsys_kernel(const char *string, char *result, size_t maxsize, bool read_value) {
+ char temp[UTIL_PATH_SIZE], *subsys, *sysname, *attr;
+ _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
+ const char *val;
+ int r;
if (string[0] != '[')
- return -1;
+ return -EINVAL;
strscpy(temp, sizeof(temp), string);
subsys = &temp[1];
sysname = strchr(subsys, '/');
- if (sysname == NULL)
- return -1;
+ if (!sysname)
+ return -EINVAL;
sysname[0] = '\0';
sysname = &sysname[1];
attr = strchr(sysname, ']');
- if (attr == NULL)
- return -1;
+ if (!attr)
+ return -EINVAL;
attr[0] = '\0';
attr = &attr[1];
if (attr[0] == '/')
if (attr[0] == '\0')
attr = NULL;
- if (read_value && attr == NULL)
- return -1;
+ if (read_value && !attr)
+ return -EINVAL;
- dev = udev_device_new_from_subsystem_sysname(udev, subsys, sysname);
- if (dev == NULL)
- return -1;
+ r = sd_device_new_from_subsystem_sysname(&dev, subsys, sysname);
+ if (r < 0)
+ return r;
if (read_value) {
- const char *val;
-
- val = udev_device_get_sysattr_value(dev, attr);
- if (val != NULL)
- strscpy(result, maxsize, val);
- else
+ r = sd_device_get_sysattr_value(dev, attr, &val);
+ if (r < 0 && r != -ENOENT)
+ return r;
+ if (r == -ENOENT)
result[0] = '\0';
+ else
+ strscpy(result, maxsize, val);
log_debug("value '[%s/%s]%s' is '%s'", subsys, sysname, attr, result);
} else {
- size_t l;
- char *s;
-
- s = result;
- l = strpcpyl(&s, maxsize, udev_device_get_syspath(dev), NULL);
- if (attr != NULL)
- strpcpyl(&s, l, "/", attr, NULL);
- log_debug("path '[%s/%s]%s' is '%s'", subsys, sysname, attr, result);
- }
- udev_device_unref(dev);
- return 0;
-}
-
-int util_log_priority(const char *priority)
-{
- char *endptr;
- int prio;
+ r = sd_device_get_syspath(dev, &val);
+ if (r < 0)
+ return r;
- prio = strtoul(priority, &endptr, 10);
- if (endptr[0] == '\0' || isspace(endptr[0])) {
- if (prio >= 0 && prio <= 7)
- return prio;
- else
- return -ERANGE;
+ strscpyl(result, maxsize, val, attr ? "/" : NULL, attr ?: NULL, NULL);
+ log_debug("path '[%s/%s]%s' is '%s'", subsys, sysname, strempty(attr), result);
}
-
- return log_level_from_string(priority);
+ return 0;
}
-size_t util_path_encode(const char *src, char *dest, size_t size)
-{
+size_t util_path_encode(const char *src, char *dest, size_t size) {
size_t i, j;
+ assert(src);
+ assert(dest);
+
for (i = 0, j = 0; src[i] != '\0'; i++) {
if (src[i] == '/') {
if (j+4 >= size) {
return j;
}
-void util_remove_trailing_chars(char *path, char c)
-{
- size_t len;
-
- if (path == NULL)
- return;
- len = strlen(path);
- while (len > 0 && path[len-1] == c)
- path[--len] = '\0';
-}
-
-int util_replace_whitespace(const char *str, char *to, size_t len)
-{
+/*
+ * Copy from 'str' to 'to', while removing all leading and trailing whitespace,
+ * and replacing each run of consecutive whitespace with a single underscore.
+ * The chars from 'str' are copied up to the \0 at the end of the string, or
+ * at most 'len' chars. This appends \0 to 'to', at the end of the copied
+ * characters.
+ *
+ * If 'len' chars are copied into 'to', the final \0 is placed at len+1
+ * (i.e. 'to[len] = \0'), so the 'to' buffer must have at least len+1
+ * chars available.
+ *
+ * Note this may be called with 'str' == 'to', i.e. to replace whitespace
+ * in-place in a buffer. This function can handle that situation.
+ *
+ * Note that only 'len' characters are read from 'str'.
+ */
+size_t util_replace_whitespace(const char *str, char *to, size_t len) {
+ bool is_space = false;
size_t i, j;
- /* strip trailing whitespace */
- len = strnlen(str, len);
- while (len && isspace(str[len-1]))
- len--;
+ assert(str);
+ assert(to);
- /* strip leading whitespace */
- i = 0;
- while ((i < len) && isspace(str[i]))
- i++;
+ i = strspn(str, WHITESPACE);
- j = 0;
- while (i < len) {
- /* substitute multiple whitespace with a single '_' */
+ for (j = 0; j < len && i < len && str[i] != '\0'; i++) {
if (isspace(str[i])) {
- while (isspace(str[i]))
- i++;
+ is_space = true;
+ continue;
+ }
+
+ if (is_space) {
+ if (j + 1 >= len)
+ break;
+
to[j++] = '_';
+ is_space = false;
}
- to[j++] = str[i++];
+ to[j++] = str[i];
}
+
to[j] = '\0';
- return 0;
+ return j;
}
-/* allow chars in whitelist, plain ascii, hex-escaping and valid utf8 */
-int util_replace_chars(char *str, const char *white)
-{
- size_t i = 0;
- int replaced = 0;
+/* allow chars in allow list, plain ascii, hex-escaping and valid utf8 */
+size_t util_replace_chars(char *str, const char *allow) {
+ size_t i = 0, replaced = 0;
+
+ assert(str);
while (str[i] != '\0') {
int len;
- if (whitelisted_char_for_devnode(str[i], white)) {
+ if (allow_listed_char_for_devnode(str[i], allow)) {
i++;
continue;
}
}
/* accept valid utf8 */
- len = utf8_encoded_valid_unichar(&str[i]);
+ len = utf8_encoded_valid_unichar(str + i, (size_t) -1);
if (len > 1) {
i += len;
continue;
}
/* if space is allowed, replace whitespace with ordinary space */
- if (isspace(str[i]) && white != NULL && strchr(white, ' ') != NULL) {
+ if (isspace(str[i]) && allow && strchr(allow, ' ')) {
str[i] = ' ';
i++;
replaced++;
*
* Returns: 0 if the entire string was copied, non-zero otherwise.
**/
-_public_ int udev_util_encode_string(const char *str, char *str_enc, size_t len)
-{
+_public_ int udev_util_encode_string(const char *str, char *str_enc, size_t len) {
return encode_devnode_name(str, str_enc, len);
}
-
-unsigned int util_string_hash32(const char *str)
-{
- return MurmurHash2(str, strlen(str), 0);
-}
-
-/* get a bunch of bit numbers out of the hash, and set the bits in our bit field */
-uint64_t util_string_bloom64(const char *str)
-{
- uint64_t bits = 0;
- unsigned int hash = util_string_hash32(str);
-
- bits |= 1LLU << (hash & 63);
- bits |= 1LLU << ((hash >> 6) & 63);
- bits |= 1LLU << ((hash >> 12) & 63);
- bits |= 1LLU << ((hash >> 18) & 63);
- return bits;
-}
projects / thirdparty / systemd.git / blobdiff