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/*
Loki_Update - A tool for updating Loki products over the Internet
Copyright (C) 2000 Loki Software, Inc.
This program 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; either version 2 of the License, or
(at your option) any later version.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
info@lokigames.com
*/
/* I modified this file a little, removing unneeded features and making the
thing compile ( Andreas Umbach <marvin@dataway.ch> ) */
#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifndef macintosh
#ifndef WIN32
# include <unistd.h>
#endif
#endif
#ifndef PATH_MAX
#define PATH_MAX 8192
#endif
#if !defined(WIN32) && !defined(macintosh) && !defined(__APPLE__)
void goto_installpath(const char *argv0)
{
char temppath[PATH_MAX];
char datapath[PATH_MAX];
char *home;
home = getenv("HOME");
if ( ! home ) {
home = ".";
}
strncpy(temppath, argv0, PATH_MAX);
if ( ! strrchr(temppath, '/') ) {
char *path;
char *last;
int found;
found = 0;
path = getenv("PATH");
do {
/* Initialize our filename variable */
temppath[0] = '\0';
/* Get next entry from path variable */
last = strchr(path, ':');
if ( ! last )
last = path+strlen(path);
/* Perform tilde expansion */
if ( *path == '~' ) {
strcpy(temppath, home);
++path;
}
/* Fill in the rest of the filename */
if ( last > (path+1) ) {
strncat(temppath, path, (last-path));
strcat(temppath, "/");
}
strcat(temppath, "./");
strcat(temppath, argv0);
/* See if it exists, and update path */
if (access(temppath, X_OK) == 0) {
++found;
}
path = last+1;
} while ( *last && !found );
} else {
/* Increment argv0 to the basename */
argv0 = strrchr(argv0, '/')+1;
}
/* Now canonicalize it to a full pathname for the data path */
datapath[0] = '\0';
if ( realpath(temppath, datapath) ) {
/* There should always be '/' in the path */
*(strrchr(datapath, '/')) = '\0';
}
if ( ! *datapath || (chdir(datapath) < 0) ) {
fprintf(stderr, "Couldn't change to install directory\n");
exit(1); /* OK: critical, installation corrupt */
}
}
#endif
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