From d6e2106e96b6969e045251d972e1adcceb9728df Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Tue, 5 Jul 2022 15:34:08 +0200 Subject: Cleanup: move filename_sane & canonicalize_path functions to libutil Signed-off-by: David Oberhollenzer --- lib/util/canonicalize_name.c | 60 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 lib/util/canonicalize_name.c (limited to 'lib/util/canonicalize_name.c') diff --git a/lib/util/canonicalize_name.c b/lib/util/canonicalize_name.c new file mode 100644 index 0000000..534e89e --- /dev/null +++ b/lib/util/canonicalize_name.c @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: LGPL-3.0-or-later */ +/* + * canonicalize_name.c + * + * Copyright (C) 2019 David Oberhollenzer + */ +#include "config.h" +#include "util/util.h" + +static void normalize_slashes(char *filename) +{ + char *dst = filename, *src = filename; + + while (*src == '/') + ++src; + + while (*src != '\0') { + if (*src == '/') { + while (*src == '/') + ++src; + if (*src == '\0') + break; + *(dst++) = '/'; + } else { + *(dst++) = *(src++); + } + } + + *dst = '\0'; +} + +int canonicalize_name(char *filename) +{ + char *dst = filename, *src = filename; + + normalize_slashes(filename); + + while (*src != '\0') { + if (src[0] == '.') { + if (src[1] == '\0') + break; + if (src[1] == '/') { + src += 2; + continue; + } + if (src[1] == '.' && (src[2] == '/' || src[2] == '\0')) + return -1; + } + + while (*src != '\0' && *src != '/') + *(dst++) = *(src++); + + if (*src == '/') + *(dst++) = *(src++); + } + + *dst = '\0'; + normalize_slashes(filename); + return 0; +} -- cgit v1.2.3