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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
8f6ce71f | 2 | /*** |
96b2fb93 | 3 | Copyright © 2008-2011 Kay Sievers |
8f6ce71f DR |
4 | ***/ |
5 | ||
11c3a366 | 6 | #include <errno.h> |
8f6ce71f | 7 | #include <stdio.h> |
11c3a366 | 8 | #include <string.h> |
8f6ce71f DR |
9 | |
10 | #include "device-nodes.h" | |
11 | #include "utf8.h" | |
12 | ||
13 | int whitelisted_char_for_devnode(char c, const char *white) { | |
f0bc5047 | 14 | |
8f6ce71f DR |
15 | if ((c >= '0' && c <= '9') || |
16 | (c >= 'A' && c <= 'Z') || | |
17 | (c >= 'a' && c <= 'z') || | |
18 | strchr("#+-.:=@_", c) != NULL || | |
19 | (white != NULL && strchr(white, c) != NULL)) | |
20 | return 1; | |
f0bc5047 | 21 | |
8f6ce71f DR |
22 | return 0; |
23 | } | |
24 | ||
25 | int encode_devnode_name(const char *str, char *str_enc, size_t len) { | |
26 | size_t i, j; | |
27 | ||
234519ae | 28 | if (!str || !str_enc) |
7e8185ef | 29 | return -EINVAL; |
8f6ce71f DR |
30 | |
31 | for (i = 0, j = 0; str[i] != '\0'; i++) { | |
32 | int seqlen; | |
33 | ||
34 | seqlen = utf8_encoded_valid_unichar(&str[i]); | |
35 | if (seqlen > 1) { | |
f0bc5047 | 36 | |
8f6ce71f | 37 | if (len-j < (size_t)seqlen) |
f0bc5047 LP |
38 | return -EINVAL; |
39 | ||
8f6ce71f DR |
40 | memcpy(&str_enc[j], &str[i], seqlen); |
41 | j += seqlen; | |
42 | i += (seqlen-1); | |
f0bc5047 | 43 | |
8f6ce71f | 44 | } else if (str[i] == '\\' || !whitelisted_char_for_devnode(str[i], NULL)) { |
f0bc5047 | 45 | |
8f6ce71f | 46 | if (len-j < 4) |
f0bc5047 LP |
47 | return -EINVAL; |
48 | ||
8f6ce71f DR |
49 | sprintf(&str_enc[j], "\\x%02x", (unsigned char) str[i]); |
50 | j += 4; | |
f0bc5047 | 51 | |
8f6ce71f DR |
52 | } else { |
53 | if (len-j < 1) | |
f0bc5047 LP |
54 | return -EINVAL; |
55 | ||
8f6ce71f DR |
56 | str_enc[j] = str[i]; |
57 | j++; | |
58 | } | |
59 | } | |
f0bc5047 | 60 | |
8f6ce71f | 61 | if (len-j < 1) |
f0bc5047 LP |
62 | return -EINVAL; |
63 | ||
8f6ce71f DR |
64 | str_enc[j] = '\0'; |
65 | return 0; | |
8f6ce71f | 66 | } |