diff options
| -rw-r--r-- | Makefile | 1 | ||||
| -rw-r--r-- | udev_utils.c | 84 | ||||
| -rw-r--r-- | udev_utils.h | 29 | ||||
| -rw-r--r-- | udev_utils_string.c | 243 |
4 files changed, 262 insertions, 95 deletions
@@ -147,6 +147,7 @@ UDEV_OBJS = \ udev_rules.o \ udev_rules_parse.o \ udev_utils.o \ + udev_utils_string.o \ udev_utils_file.o \ udev_utils_run.o \ udev_libc_wrapper.o diff --git a/udev_utils.c b/udev_utils.c index fc1e2e1f7e..c7292d0f04 100644 --- a/udev_utils.c +++ b/udev_utils.c @@ -36,69 +36,6 @@ #include "udev_utils.h" #include "list.h" -/* compare string with pattern (supports * ? [0-9] [!A-Z]) */ -int strcmp_pattern(const char *p, const char *s) -{ - if (s[0] == '\0') { - while (p[0] == '*') - p++; - return (p[0] != '\0'); - } - switch (p[0]) { - case '[': - { - int not = 0; - p++; - if (p[0] == '!') { - not = 1; - p++; - } - while ((p[0] != '\0') && (p[0] != ']')) { - int match = 0; - if (p[1] == '-') { - if ((s[0] >= p[0]) && (s[0] <= p[2])) - match = 1; - p += 3; - } else { - match = (p[0] == s[0]); - p++; - } - if (match ^ not) { - while ((p[0] != '\0') && (p[0] != ']')) - p++; - if (p[0] == ']') - return strcmp_pattern(p+1, s+1); - } - } - } - break; - case '*': - if (strcmp_pattern(p, s+1)) - return strcmp_pattern(p+1, s); - return 0; - case '\0': - if (s[0] == '\0') { - return 0; - } - break; - default: - if ((p[0] == s[0]) || (p[0] == '?')) - return strcmp_pattern(p+1, s+1); - break; - } - return 1; -} - -int string_is_true(const char *str) -{ - if (strcasecmp(str, "true") == 0) - return 1; - if (strcasecmp(str, "yes") == 0) - return 1; - if (strcasecmp(str, "1") == 0) - return 1; - return 0; -} int log_priority(const char *priority) { @@ -143,27 +80,6 @@ int kernel_release_satisfactory(unsigned int version, unsigned int patchlevel, u return 0; } -void replace_untrusted_chars(char *string) -{ - size_t len; - - for (len = 0; string[len] != '\0'; len++) { - if (strchr(";,~\\()\'", string[len])) { - info("replace '%c' in '%s'", string[len], string); - string[len] = '_'; - } - } -} - -void remove_trailing_char(char *path, char c) -{ - size_t len; - - len = strlen(path); - while (len > 0 && path[len-1] == c) - path[--len] = '\0'; -} - int name_list_add(struct list_head *name_list, const char *name, int sort) { struct name_entry *loop_name; diff --git a/udev_utils.h b/udev_utils.h index 0a307526b7..a07d8d2b7c 100644 --- a/udev_utils.h +++ b/udev_utils.h @@ -31,22 +31,29 @@ struct name_entry { char name[PATH_SIZE]; }; -extern int strcmp_pattern(const char *p, const char *s); -extern int kernel_release_satisfactory(unsigned int version, unsigned int patchlevel, unsigned int sublevel); -extern int create_path(const char *path); +/* udev_utils.c */ extern int log_priority(const char *priority); -extern int string_is_true(const char *str); -extern int parse_get_pair(char **orig_string, char **left, char **right); -extern int unlink_secure(const char *filename); -extern int file_map(const char *filename, char **buf, size_t *bufsize); -extern void file_unmap(void *buf, size_t bufsize); -extern size_t buf_get_line(const char *buf, size_t buflen, size_t cur); -extern void remove_trailing_char(char *path, char c); -extern void replace_untrusted_chars(char *string); +extern int kernel_release_satisfactory(unsigned int version, unsigned int patchlevel, unsigned int sublevel); extern int name_list_add(struct list_head *name_list, const char *name, int sort); extern int name_list_key_add(struct list_head *name_list, const char *key, const char *value); extern void name_list_cleanup(struct list_head *name_list); extern int add_matching_files(struct list_head *name_list, const char *dirname, const char *suffix); + +/* udev_utils_string.c */ +extern int strcmp_pattern(const char *p, const char *s); +extern int string_is_true(const char *str); +extern void replace_untrusted_chars(char *string); +extern void remove_trailing_char(char *path, char c); +extern int utf8_encoded_valid_unichar(const char *str); + +/* udev_utils_file.c */ +extern int create_path(const char *path); +extern int file_map(const char *filename, char **buf, size_t *bufsize); +extern void file_unmap(void *buf, size_t bufsize); +extern int unlink_secure(const char *filename); +extern size_t buf_get_line(const char *buf, size_t buflen, size_t cur); + +/* udev_utils_run.c */ extern int pass_env_to_socket(const char *name, const char *devpath, const char *action); extern int run_program(const char *command, const char *subsystem, char *result, size_t ressize, size_t *reslen, int log); diff --git a/udev_utils_string.c b/udev_utils_string.c new file mode 100644 index 0000000000..a30181e760 --- /dev/null +++ b/udev_utils_string.c @@ -0,0 +1,243 @@ +/* + * udev_utils_string.c - string manipulation + * + * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org> + * + * 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. + * + */ + + +#include <stdlib.h> +#include <stdio.h> +#include <stddef.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#include <ctype.h> +#include <dirent.h> +#include <syslog.h> +#include <sys/utsname.h> + +#include "udev_libc_wrapper.h" +#include "udev.h" +#include "logging.h" +#include "udev_utils.h" +#include "list.h" + +/* compare string with pattern (like fnmatch(), supports * ? [0-9] [!A-Z]) */ +int strcmp_pattern(const char *p, const char *s) +{ + if (s[0] == '\0') { + while (p[0] == '*') + p++; + return (p[0] != '\0'); + } + switch (p[0]) { + case '[': + { + int not = 0; + p++; + if (p[0] == '!') { + not = 1; + p++; + } + while ((p[0] != '\0') && (p[0] != ']')) { + int match = 0; + if (p[1] == '-') { + if ((s[0] >= p[0]) && (s[0] <= p[2])) + match = 1; + p += 3; + } else { + match = (p[0] == s[0]); + p++; + } + if (match ^ not) { + while ((p[0] != '\0') && (p[0] != ']')) + p++; + if (p[0] == ']') + return strcmp_pattern(p+1, s+1); + } + } + } + break; + case '*': + if (strcmp_pattern(p, s+1)) + return strcmp_pattern(p+1, s); + return 0; + case '\0': + if (s[0] == '\0') { + return 0; + } + break; + default: + if ((p[0] == s[0]) || (p[0] == '?')) + return strcmp_pattern(p+1, s+1); + break; + } + return 1; +} + +int string_is_true(const char *str) +{ + if (strcasecmp(str, "true") == 0) + return 1; + if (strcasecmp(str, "yes") == 0) + return 1; + if (strcasecmp(str, "1") == 0) + return 1; + return 0; +} + +void remove_trailing_char(char *path, char c) +{ + size_t len; + + len = strlen(path); + while (len > 0 && path[len-1] == c) + path[--len] = '\0'; +} + +/* count of characters used to encode one unicode char */ +static int utf8_encoded_expected_len(const char *str) +{ + unsigned char c = (unsigned char)str[0]; + + if (c < 0x80) + return 1; + if ((c & 0xe0) == 0xc0) + return 2; + if ((c & 0xf0) == 0xe0) + return 3; + if ((c & 0xf8) == 0xf0) + return 4; + if ((c & 0xfc) == 0xf8) + return 5; + if ((c & 0xfe) == 0xfc) + return 6; + return 0; +} + +/* decode one unicode char */ +static int utf8_encoded_to_unichar(const char *str) +{ + int unichar; + int len; + int i; + + len = utf8_encoded_expected_len(str); + switch (len) { + case 1: + return (int)str[0]; + case 2: + unichar = str[0] & 0x1f; + break; + case 3: + unichar = (int)str[0] & 0x0f; + break; + case 4: + unichar = (int)str[0] & 0x07; + break; + case 5: + unichar = (int)str[0] & 0x03; + break; + case 6: + unichar = (int)str[0] & 0x01; + break; + default: + return -1; + } + + for (i = 1; i < len; i++) { + if (((int)str[i] & 0xc0) != 0x80) + return -1; + unichar <<= 6; + unichar |= (int)str[i] & 0x3f; + } + + return unichar; +} + +/* expected size used to encode one unicode char */ +static int utf8_unichar_to_encoded_len(int unichar) +{ + if (unichar < 0x80) + return 1; + if (unichar < 0x800) + return 2; + if (unichar < 0x10000) + return 3; + if (unichar < 0x200000) + return 4; + if (unichar < 0x4000000) + return 5; + return 6; +} + +/* check if unicode char has a valid numeric range */ +static int utf8_unichar_valid_range(int unichar) +{ + if (unichar > 0x10ffff) + return 0; + if ((unichar & 0xfffff800) == 0xd800) + return 0; + if ((unichar > 0xfdcf) && (unichar < 0xfdf0)) + return 0; + if ((unichar & 0xffff) == 0xffff) + return 0; + return 1; +} + +/* validate one encoded unicode char and return its length */ +int utf8_encoded_valid_unichar(const char *str) +{ + int len; + int unichar; + int i; + + len = utf8_encoded_expected_len(str); + if (len == 0) + return -1; + + /* ascii is valid */ + if (len == 1) + return 1; + + /* check if expected encoded chars are available */ + for (i = 0; i < len; i++) + if ((str[i] & 0x80) != 0x80) + return -1; + + unichar = utf8_encoded_to_unichar(str); + + /* check if encoded length matches encoded value */ + if (utf8_unichar_to_encoded_len(unichar) != len) + return -1; + + /* check if value has valid range */ + if (!utf8_unichar_valid_range(unichar)) + return -1; + + return len; +} + +void replace_untrusted_chars(char *string) +{ + size_t len; + + for (len = 0; string[len] != '\0'; len++) { + if (strchr(";,~\\()\'", string[len])) + string[len] = '_'; + } +} |