81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2008-2011 Kay Sievers
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdio.h>
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#include "device-nodes.h"
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#include "utf8.h"
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int whitelisted_char_for_devnode(char c, const char *white) {
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if ((c >= '0' && c <= '9') ||
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(c >= 'A' && c <= 'Z') ||
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(c >= 'a' && c <= 'z') ||
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strchr("#+-.:=@_", c) != NULL ||
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(white != NULL && strchr(white, c) != NULL))
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return 1;
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return 0;
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}
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int encode_devnode_name(const char *str, char *str_enc, size_t len) {
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size_t i, j;
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if (str == NULL || str_enc == NULL)
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return -EINVAL;
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for (i = 0, j = 0; str[i] != '\0'; i++) {
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int seqlen;
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seqlen = utf8_encoded_valid_unichar(&str[i]);
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if (seqlen > 1) {
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if (len-j < (size_t)seqlen)
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return -EINVAL;
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memcpy(&str_enc[j], &str[i], seqlen);
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j += seqlen;
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i += (seqlen-1);
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} else if (str[i] == '\\' || !whitelisted_char_for_devnode(str[i], NULL)) {
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if (len-j < 4)
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return -EINVAL;
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sprintf(&str_enc[j], "\\x%02x", (unsigned char) str[i]);
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j += 4;
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} else {
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if (len-j < 1)
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return -EINVAL;
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str_enc[j] = str[i];
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j++;
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}
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}
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if (len-j < 1)
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return -EINVAL;
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str_enc[j] = '\0';
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return 0;
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}
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