138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these librararies and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: dtksh.c /main/3 1995/11/01 15:53:19 rswiston $ */
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/* Copyright (c) 1991, 1992 UNIX System Laboratories, Inc. */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF */
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/* UNIX System Laboratories, Inc. */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#include "stdio.h"
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#include <sys/stat.h>
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#include <string.h>
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#include <stdlib.h>
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#define CONSTCHAR (const char *)
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#define TRUE 1
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#define FALSE 0
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#ifndef DTKSHBINDIR
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#define DTKSHBINDIR "/usr/bin"
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#endif
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static int
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FileExists(dir, file)
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char *dir, *file;
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{
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struct stat sbuf;
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char path[1024];
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sprintf(path, "%s/%s", dir, file);
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return(stat(path, &sbuf) != -1);
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}
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/*
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* Bootstrap dtksh by calling xmcoeksh and forcing it to execute
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* an rc file that calls the dtksh init function and does some
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* other minor housekeeping.
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*
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* The rc file then sees if there was a previous user rc file (in $_HOLDENV_)
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* and if so executes it.
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*/
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char *env;
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char *bindir = NULL;
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char *executable, *envfile;
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char *buf;
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char envbuf[1024];
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/*
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* Set the ENV variable to the standard dtksh rc file, which
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* will do a libdirload of the dtksh shared object file and add all
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* the dtksh commands and widgets to the exksh. If the user already
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* had an ENV file, then set the variable _HOLDENV_ to it so the
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* standard dtksh rc file can execute it later.
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*/
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env = getenv((const char *)"ENV");
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buf = (char *)malloc((env ? strlen(env) : 0) + 12);
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strcpy(buf, "_HOLDENV_=");
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strcat(buf, env ? env : "");
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putenv(buf);
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executable = "xmcoeksh";
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envfile = "xmcoeksh.rc";
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/*
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* Search order for DTKSH binaries:
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*
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* 1. if $DTKSHBINDIR is set, use that path if it exists.
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* 2. if the hard-wired #define DTKSHBINDIR is set and is a
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* readable directory, use it.
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* 3. punt.
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*/
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if ((bindir = getenv((const char *)"DTKSHBINDIR")) != NULL) {
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if ((!FileExists(bindir, executable)) ||
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(!FileExists(bindir, envfile)))
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{
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bindir = NULL;
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}
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}
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if (bindir == NULL)
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{
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bindir = DTKSHBINDIR;
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if ((!FileExists(bindir, executable)) ||
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(!FileExists(bindir, envfile)))
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{
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bindir = NULL;
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}
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}
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if (bindir == NULL) {
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fprintf(stderr,
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"dtksh: bootstrap failed. Unable to locate both\nxmcoeksh and xmcoeksh.rc in the same directory.\n Try setting $DTKSHBINDIR.\n");
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exit(1);
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}
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sprintf(envbuf, "DTKSHBINDIR=%s", bindir);
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putenv(strdup(envbuf));
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sprintf(envbuf, "ENV=%s/%s", bindir, envfile);
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putenv(strdup(envbuf));
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sprintf(envbuf, "%s/%s", bindir, executable);
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execv(envbuf, argv);
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fprintf(stderr, "dtksh: Bootstrap of dtksh failed: '%s'\n", envbuf);
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perror("Reason");
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return(1); /* failure */
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}
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