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120 lines
3.8 KiB
120 lines
3.8 KiB
/**
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@file
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@ingroup util
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@brief Tilde expansion.
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@copyright@parblock
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Copyright (c) 1994-1998 The Regents of the Univ. of California.
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All rights reserved.
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Permission is hereby granted, without written agreement and without license
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or royalty fees, to use, copy, modify, and distribute this software and its
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documentation for any purpose, provided that the above copyright notice and
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the following two paragraphs appear in all copies of this software.
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IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
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OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN
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"AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO PROVIDE
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MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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@endparblock
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@copyright@parblock
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Copyright (c) 1999-2015, Regents of the University of Colorado
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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Neither the name of the University of Colorado nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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@endparblock
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*/
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#include "util.h"
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#ifdef BSD
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#include <pwd.h>
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#endif
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/**
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* @brief Expands tilde in a file name
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*/
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char *
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util_tilde_expand(char const *fname)
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{
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#ifdef BSD
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struct passwd *userRecord;
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char username[256], *filename;
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register int i, j;
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filename = ALLOC(char, strlen(fname) + 256);
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/* Clear the return string */
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i = 0;
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filename[0] = '\0';
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/* Tilde? */
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if (fname[0] == '~') {
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j = 0;
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i = 1;
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while ((fname[i] != '\0') && (fname[i] != '/')) {
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username[j++] = fname[i++];
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}
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username[j] = '\0';
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if (username[0] == '\0') {
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/* ~/ resolves to home directory of current user */
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if ((userRecord = getpwuid(getuid())) != 0) {
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(void) strcat(filename, userRecord->pw_dir);
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} else {
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i = 0;
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}
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} else {
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/* ~user/ resolves to home directory of 'user' */
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if ((userRecord = getpwnam(username)) != 0) {
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(void) strcat(filename, userRecord->pw_dir);
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} else {
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i = 0;
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}
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}
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}
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/* Concantenate remaining portion of file name */
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(void) strcat(filename, fname + i);
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return filename;
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#else
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return util_strsav(fname);
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#endif
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}
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