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/*
* fnsearch.c
*
* $Id$
*
* Search a file in a search path
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2012 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*
*/
#include "libutil.h"
#ifdef DOSFS
#define PATHSEP ';'
#define SLASH '\\'
#else
#define PATHSEP ':'
#define SLASH '/'
#endif
char *
fnsearch (const char *filename, const char *path)
{
static char *namebuf = NULL;
static size_t namebuf_size = 0;
size_t new_size;
const char *cp;
char *np;
if (path == NULL)
return NULL;
cp = path;
/* Avoid a call to realloc, whenever possible */
new_size = strlen(path) + strlen(filename) + 2;
if (namebuf_size < new_size)
{
/* Ask more than enough space to store the result */
/* (realloc of NULL behaves like malloc) */
np = realloc(namebuf, new_size);
if (np == NULL)
return NULL;
namebuf_size = new_size;
namebuf = np;
}
else
np = namebuf;
while (1)
{
if (*cp == PATHSEP || *cp == '\0')
{
*np++ = SLASH;
strcpy (np, filename);
if (access (namebuf, 0) == 0)
return namebuf;
if (*cp++ == '\0')
return NULL;
np = namebuf;
}
else
*np++ = *cp++;
}
}
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