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/***************************************************************************/
/***************************************************************************/
/* */
/* (c) 1995-1998. The Regents of the University of California. All */
/* rights reserved. */
/* */
/* This work was produced at the University of California, Lawrence */
/* Livermore National Laboratory (UC LLNL) under contract no. */
/* W-7405-ENG-48 (Contract 48) between the U.S. Department of Energy */
/* (DOE) and The Regents of the University of California (University) */
/* for the operation of UC LLNL. Copyright is reserved to the */
/* University for purposes of controlled dissemination, */
/* commercialization through formal licensing, or other disposition */
/* under terms of Contract 48; DOE policies, regulations and orders; */
/* and U.S. statutes. The rights of the Federal Government are */
/* reserved under Contract 48 subject to the restrictions agreed upon */
/* by the DOE and University. */
/* */
/* */
/* DISCLAIMER */
/* */
/* This software was prepared as an account of work sponsored by an */
/* agency of the United States Government. Neither the United States */
/* Government nor the University of California nor any of their */
/* employees, makes any warranty, express or implied, or assumes any */
/* liability or responsibility for the accuracy, completeness, or */
/* usefulness of any information, apparatus, product, or process */
/* disclosed, or represents that its specific commercial products, */
/* process, or service by trade name, trademark, manufacturer, or */
/* otherwise, does not necessarily constitute or imply its */
/* endorsement, recommendation, or favoring by the United States */
/* Government or the University of California. The views and opinions */
/* of the authors expressed herein do not necessarily state or reflect */
/* those of the United States Government or the University of */
/* California, and shall not be used for advertising or product */
/* endorsement purposes. */
/* */
/* Permission to use, copy, modify and distribute this software and its */
/* documentation for any non-commercial purpose, without fee, is */
/* hereby granted, provided that the above copyright notice and this */
/* permission notice appear in all copies of the software and */
/* supporting documentation, and that all UC LLNL identification in */
/* the user interface remain unchanged. The title to copyright LLNL */
/* XDIR shall at all times remain with The Regents of the University */
/* of California and users agree to preserve same. Users seeking the */
/* right to make derivative works with LLNL XDIR for commercial */
/* purposes may obtain a license from the Lawrence Livermore National */
/* Laboratory's Technology Transfer Office, P.O. Box 808, L-795, */
/* Livermore, CA 94550. */
/* */
/***************************************************************************/
/***************************************************************************/
#include <stdio.h>
#include <signal.h>
#include <Xm/Xm.h>
#define MAXARGV 50
#ifndef SIGCLD
#define SIGCLD SIGCHLD
#endif
static int child_is_done;
static int child_pid;
static int child_status;
void reaper_for_execute();
/*
* execute - Execute "command" under the bourne shell. This function does
* not return until the command is complete or until the user
* presses the stop button. Returns -6 for stop button pushed,
* -1 for problem running command (including nonzero exit status),
* and 0 for success. The purpose of this function is to act
* somewhat like system(), but with stop button processing.
*/
execute(command)
char *command;
{
char *argv[MAXARGV+1];
char *cmd;
int argc = 0;
int stop_was_pressed = False;
/* Don't alter input argument */
cmd = XtNewString(command);
/* Parse execute line into tokens */
if ((argv[argc++] = strtok(cmd, " ")) == NULL)
fatal_error("Trouble in execute()");
while (argc < MAXARGV && (argv[argc] = strtok(NULL, " ")) != NULL)
argc++;
if (argc == MAXARGV)
fatal_error("Trouble in execute() - Too many tokens");
/* Temporarily replace current signal handler for reaping children */
save_sigcld_handler();
signal(SIGCLD, reaper_for_execute);
child_is_done = False;
/* Run the command */
if ((child_pid = fork()) == 0)
if (execvp(argv[0], argv) == -1) {
fprintf(stderr, "\007*** Unable to launch %s: ", argv[1]);
perror("");
exit(-1);
}
XtFree(cmd);
/* Wait until command is done or until user presses stop button */
while (!child_is_done)
if (rest_stop(1) == -6) {
kill(child_pid, SIGINT);
stop_was_pressed = True;
}
/* Restore the old signal handler for reaping children */
restore_sigcld_handler();
/* Figure out what value to return */
if (stop_was_pressed)
return -6;
else if (child_status)
return -1;
else
return 0;
}
/*
* reaper_for_execute - Signal handler for processing SIGCLD for function
* execute().
*/
void
reaper_for_execute(signo)
int signo;
{
int pid;
while ((pid = simple_iwait(&child_status)) != child_pid) {
if (pid == -1)
fatal_error("Problem in reaper_for_execute()");
signal(SIGCLD, reaper_for_execute); /* Some systems require this */
}
child_is_done = True;
}
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