1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/server/src/fspath.cc Thu Feb 07 17:30:14 2019 +0100
1.3 @@ -0,0 +1,42 @@
1.4 +/*
1.5 + * Filesystem path utilities.
1.6 + *
1.7 + * Copyright (C) 2018 Paul Boddie <paul@boddie.org.uk>
1.8 + *
1.9 + * This program is free software; you can redistribute it and/or
1.10 + * modify it under the terms of the GNU General Public License as
1.11 + * published by the Free Software Foundation; either version 2 of
1.12 + * the License, or (at your option) any later version.
1.13 + *
1.14 + * This program is distributed in the hope that it will be useful,
1.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.17 + * GNU General Public License for more details.
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License
1.20 + * along with this program; if not, write to the Free Software
1.21 + * Foundation, Inc., 51 Franklin Street, Fifth Floor,
1.22 + * Boston, MA 02110-1301, USA
1.23 + */
1.24 +
1.25 +#include <string.h>
1.26 +
1.27 +#include "fspath.h"
1.28 +
1.29 +void rewrite_path(char *path, const char *prefix)
1.30 +{
1.31 + size_t pathlen = strlen(path),
1.32 + prefixlen = strlen(prefix),
1.33 + newpathlen = pathlen - prefixlen;
1.34 + const char *newpath = path + prefixlen;
1.35 +
1.36 + /* Copy the new path (minus the prefix) to the base address. */
1.37 +
1.38 + memmove(path, newpath, strlen(newpath));
1.39 +
1.40 + /* Overwrite remaining traces of the old path. Since the new path has been
1.41 + relocated over the prefix, the remaining traces are as long as the
1.42 + prefix. */
1.43 +
1.44 + memset(path + newpathlen, 0, prefixlen);
1.45 +}