/*** This file is part of eudev, forked from systemd. Copyright 2008-2011 Kay Sievers 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/>. ***/ #include <stdlib.h> #include <stdio.h> #include <string.h> #include <stdint.h> #include <sys/types.h> #include "device-nodes.h" #include "utf8.h" int whitelisted_char_for_devnode(char c, const char *white) { if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || strchr("#+-.:=@_", c) != NULL || (white != NULL && strchr(white, c) != NULL)) return 1; return 0; } int encode_devnode_name(const char *str, char *str_enc, size_t len) { size_t i, j; if (str == NULL || str_enc == NULL) return -EINVAL; for (i = 0, j = 0; str[i] != '\0'; i++) { int seqlen; seqlen = utf8_encoded_valid_unichar(&str[i]); if (seqlen > 1) { if (len-j < (size_t)seqlen) goto err; memcpy(&str_enc[j], &str[i], seqlen); j += seqlen; i += (seqlen-1); } else if (str[i] == '\\' || !whitelisted_char_for_devnode(str[i], NULL)) { if (len-j < 4) goto err; sprintf(&str_enc[j], "\\x%02x", (unsigned char) str[i]); j += 4; } else { if (len-j < 1) goto err; str_enc[j] = str[i]; j++; } } if (len-j < 1) goto err; str_enc[j] = '\0'; return 0; err: return -EINVAL; }