cdesktop/cde/programs/dtksh/extra.c

/*
 * CDE - Common Desktop Environment
 *
 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
 *
 * These libraries and programs are free software; you can
 * redistribute them and/or modify them under the terms of the GNU
 * Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * These libraries and programs are distributed in the hope that
 * they will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with these libraries and programs; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301 USA
 */
/* $XConsortium: extra.c /main/4 1995/11/01 15:54:55 rswiston $ */

/*	Copyright (c) 1991, 1992 UNIX System Laboratories, Inc. */
/*	All Rights Reserved     */

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF    */
/*	UNIX System Laboratories, Inc.			*/
/*	The copyright notice above does not evidence any       */
/*	actual or intended publication of such source code.    */


#include	"defs.h"
#include	"shell.h"
#include	"name.h"
#include	"stdio.h"
#include	"msgs.h"


void
env_set(
        char *var )
{
	(void)nv_open(var, sh.var_tree, NV_ASSIGN);
}

void
env_set_gbl(
        char *vareqval )
{
        env_set(vareqval);
}

char *
env_get(
        char *var )
{
	Namval_t *np;
	char *val;

	np = nv_search(var,sh.var_tree,0);
	if (np && (val = nv_getval(np)))
		return(val);
	return(NULL);
}


int
ksh_eval(
        char *cmd )
{
        sh_eval(sfopen(NIL(Sfio_t*),cmd,"s"),0);
        sfsync(sh.outpool);
	return(sh.exitval);
}

void
env_set_var(
        char *var,
        char *val )
{
	int len;
	char tmp[512];
	char *set = &tmp[0];

	if ((len = strlen(var) + strlen(val?val:"") + 2) > sizeof(tmp)) /* 11/06 CHANGED */
		set = malloc(len);
	strcpy(set, var);
	strcat(set, "=");
	strcat(set, val?val:""); 			/* 11/06 CHANGED */
	env_set(set);
	if (set != &tmp[0])
		free(set);
}

void
env_blank(
        char *var )
{
	env_set_var(var, "");
}

void
printerr(
        char *cmd,
        char *msg1,
        char *msg2 )
{
	if (msg1 == NULL)
		msg1 = "";
	if (msg2 == NULL)
		msg2 = "";
        if (cmd && (strlen(cmd) > 0))
	   printf( "%s: %s %s\n", cmd, msg1, msg2);
        else
	   printf( "%s %s\n", msg1, msg2);
}

void
printerrf(
        char *cmd,
        char *fmt,
        char *arg0,
        char *arg1,
        char *arg2,
        char *arg3,
        char *arg4,
        char *arg5,
        char *arg6,
        char *arg7 )
{
	char buf[2048];
	if (arg0 == NULL)
		arg0 = "";
	if (arg1 == NULL)
		arg1 = "";
	if (arg2 == NULL)
		arg2 = "";
	if (arg3 == NULL)
		arg3 = "";
	if (arg4 == NULL)
		arg4 = "";
	if (arg5 == NULL)
		arg5 = "";
	if (arg6 == NULL)
		arg6 = "";
	if (arg7 == NULL)
		arg7 = "";

	sprintf(buf, fmt, arg0, arg1, arg2, arg3,arg4, arg5, arg6, arg7);
        if (cmd && (strlen(cmd) > 0))
	   printf("%s: %s\n", cmd, buf);
        else
	   printf("%s\n", buf);
}

/****************************************************************************
 *
 * The following two functions are ugly, but necessary.  Ksh reserves file
 * descriptors 0 - 9 for use by shell scripts, and has intimate knowledge
 * of how and when they were opened.  Unfortunately, certain dtksh functions
 * (XtInitialize, catopen, ttdt_open, _DtActionInvoke, others) open file
 * descriptors which are not known to ksh.  We can't let these file
 * descriptors fall in the 0 - 9 range, because we can't afford to have
 * the shell script overriding our file descriptors.  Therefore, any of
 * our commands which open files must first lock our file descriptors 0 - 9,
 * thus forcing the command to get a file descriptor out of the shell's
 * range.  After the command has opened its file descriptor, it then needs
 * to unlock file descriptors 0 - 9, so that the shell script will have
 * access to them again.
 *
 **************************************************************************/


/*
 * Return a list of the file descriptors we had to open, to lock out file
 * descriptors 0 - 9; this list should be freed (and the file descriptors
 * closed) by calling UnlockkshFileDescriptors().
 */

int *LockKshFileDescriptors(void)
{
   int * fdList;
   int i;
   int fd, newfd;

   fdList = (int *)malloc(sizeof(int) * 10);
   for (i = 0; i < 10; i++)
      fdList[i] = -1;

   if ((fd = open("/dev/null", O_RDONLY)) >= 0)
   {
      if (fd < 10)
      {
         fdList[0] = fd;
         for (i = 1; i < 10; i++)
         {
            if ((newfd = dup(fd)) < 10)
               fdList[i] = newfd;
            else
            {
	       close(newfd);
               break;
            }
         }
      }
      else
         close(fd);
   }

   return(fdList);
}

void UnlockKshFileDescriptors(int *fdList)
{
   int i;

   for (i = 0; i < 10; i++)
   {
      if (fdList[i] != (-1))
         close(fdList[i]);
   }

   free((char *)fdList);
}