From b750101eb236130cf056c675997decbac904cc49 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:35:18 +0200 Subject: Adding upstream version 252.22. Signed-off-by: Daniel Baumann --- src/shared/device-nodes.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 src/shared/device-nodes.c (limited to 'src/shared/device-nodes.c') diff --git a/src/shared/device-nodes.c b/src/shared/device-nodes.c new file mode 100644 index 0000000..40e4693 --- /dev/null +++ b/src/shared/device-nodes.c @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include +#include +#include + +#include "device-nodes.h" +#include "string-util.h" +#include "utf8.h" + +int allow_listed_char_for_devnode(char c, const char *white) { + return + ascii_isdigit(c) || + ascii_isalpha(c) || + strchr("#+-.:=@_", c) || + (white && strchr(white, c)); +} + +int encode_devnode_name(const char *str, char *str_enc, size_t len) { + size_t i, j; + + if (!str || !str_enc) + return -EINVAL; + + for (i = 0, j = 0; str[i] != '\0'; i++) { + int seqlen; + + seqlen = utf8_encoded_valid_unichar(str + i, SIZE_MAX); + 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] == '\\' || !allow_listed_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; +} -- cgit v1.2.3