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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* getpath.c - function to search for file in a list of directories |
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* |
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* External symbols declared in standard.h |
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*/ |
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#define NULL 0 |
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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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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* |
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* 1. 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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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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#include <pwd.h> |
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#include "standard.h" |
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|
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extern char *strcpy(), *strcat(), *getenv(); |
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#include "paths.h" |
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|
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#ifndef NIX |
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#include <pwd.h> |
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extern struct passwd *getpwnam(); |
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#endif |
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char * |
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register char *searchpath; |
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int mode; |
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{ |
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static char pname[256]; |
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#ifndef NIX |
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struct passwd *pwent; |
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#endif |
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static char pname[MAXPATH]; |
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register char *cp; |
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|
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if (fname == NULL) |
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return(NULL); |
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|
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pname[0] = '\0'; /* check for full specification */ |
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switch (*fname) { |
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case '/': /* relative to root */ |
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CASEDIRSEP: /* relative to root */ |
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case '.': /* relative to cwd */ |
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strcpy(pname, fname); |
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return(pname); |
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break; |
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#ifndef NIX |
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case '~': /* relative to home directory */ |
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fname++; |
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if (*fname == '\0' || *fname == '/') { /* ours */ |
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if (*fname == '\0' || ISDIRSEP(*fname)) { /* ours */ |
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if ((cp = getenv("HOME")) == NULL) |
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return(NULL); |
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strcpy(pname, cp); |
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strcat(pname, fname); |
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return(pname); |
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break; |
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} |
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cp = pname; /* user */ |
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do |
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*cp++ = *fname++; |
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while (*fname && *fname != '/'); |
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while (*fname && !ISDIRSEP(*fname)); |
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*cp = '\0'; |
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if ((pwent = getpwnam(pname)) == NULL) |
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return(NULL); |
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strcpy(pname, pwent->pw_dir); |
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strcat(pname, fname); |
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return(pname); |
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break; |
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#endif |
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} |
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if (pname[0]) /* got it, check access if search requested */ |
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return(searchpath==NULL||access(pname,mode)==0 ? pname : NULL); |
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|
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if (searchpath == NULL) { /* don't search */ |
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strcpy(pname, fname); |
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/* check search path */ |
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do { |
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cp = pname; |
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while (*searchpath && (*cp = *searchpath++) != ':') |
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while (*searchpath && (*cp = *searchpath++) != PATHSEP) |
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cp++; |
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if (cp > pname && cp[-1] != '/') |
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*cp++ = '/'; |
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if (cp > pname && !ISDIRSEP(cp[-1])) |
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*cp++ = DIRSEP; |
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strcpy(cp, fname); |
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if (access(pname, mode) == 0) /* file accessable? */ |
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return(pname); |
