diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-02 13:16:04 -0400 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-02 13:16:04 -0400 |
commit | fccd290a8373438c26ed4e4f8130db18eb9b3dfe (patch) | |
tree | 2f032e1b125aa88e456644de865e9f42fffa4150 /src/libbasic/device-nodes.c | |
parent | 6169d05b4a456e26a0197242464e3e2bca12a29d (diff) |
./move.sh
Diffstat (limited to 'src/libbasic/device-nodes.c')
-rw-r--r-- | src/libbasic/device-nodes.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/libbasic/device-nodes.c b/src/libbasic/device-nodes.c new file mode 100644 index 0000000000..38c0628a90 --- /dev/null +++ b/src/libbasic/device-nodes.c @@ -0,0 +1,80 @@ +/*** + This file is part of 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 <errno.h> +#include <stdio.h> +#include <string.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) + return -EINVAL; + + 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) + return -EINVAL; + + sprintf(&str_enc[j], "\\x%02x", (unsigned char) str[i]); + j += 4; + + } else { + if (len-j < 1) + return -EINVAL; + + str_enc[j] = str[i]; + j++; + } + } + + if (len-j < 1) + return -EINVAL; + + str_enc[j] = '\0'; + return 0; +} |