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/* From: Tony Rems <rembo@unisoft.com>
* Newsgroups: comp.sources.unix
* Subject: v24i084: Repeatedly execute a program under curses(3)
* Date: 26 Mar 91 21:41:30 GMT
*
* Slighty modified, and corrected, Francois Pinard, 91-04.
*/
#include <ncurses.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <sys/fcntl.h>
int die_flag;
void die ();
extern FILE *popen ();
extern int pclose ();
extern long time ();
extern char *ctime ();
/*-----------------------------------------.
* Decode parameters and launch execution. |
*-----------------------------------------*/
char *program_name;
int
main (argc, argv)
int argc;
char *argv[];
{
int hor = 1, ver = 0;
FILE *piper;
char buf[180];
char cmd[128];
int count = 1;
long timer;
int nsecs = 2;
program_name = argv[0];
if (argc < 2)
{
fprintf (stderr, "Usage: %s COMMAND [-n SLEEP] [ARG ...]\n", argv[0]);
exit (1);
}
/* If -n is specified, convert the next argument to the numver for the
number of seconds. */
if (strcmp (argv[1], "-n") == 0)
{
nsecs = atoi (argv[2]);
count = 3;
if (nsecs == 0 || argc < 4)
{
fprintf (stderr, "Usage: %s COMMAND [-n SLEEP] [ARG ...]\n", argv[0]);
exit (1);
}
}
/* Build command string to give to popen. */
bzero (cmd, sizeof (cmd));
strcpy (cmd, argv[count]);
while (++count < argc)
{
strcat (cmd, " ");
strcat (cmd, argv[count]);
}
/* Catch keyboard interrupts so we can put tty back in a sane state. */
signal (SIGINT, die);
signal (SIGTERM, die);
signal (SIGHUP, die);
/* Set up tty for curses use. */
initscr ();
nonl ();
noecho ();
crmode ();
die_flag = 0;
while (!die_flag)
{
/* Put up time interval and current time. */
hor = 1;
move (hor, ver);
time (&timer);
printw ("Every %d seconds\t\t%s\t\t%s", nsecs, cmd, ctime (&timer));
hor = 3;
/* Open pipe to command. */
if ((piper = popen (cmd, "r")) == (FILE *)NULL)
{
perror ("popen");
exit (2);
}
/* Read in output from the command and make sure that it will fit on 1
screen. */
while ((fgets(buf, sizeof (buf), piper) != NULL) && hor < LINES)
{
buf[COLS-1] = '\0';
mvaddstr (hor, ver, buf);
clrtoeol ();
hor++;
}
pclose (piper);
if (hor < LINES)
{
move (hor, ver);
clrtobot ();
}
refresh ();
sleep (nsecs);
}
nocrmode ();
echo ();
nl ();
endwin ();
return (0);
}
/*------------------------------------.
| Stop the program on any interrupt. |
`------------------------------------*/
void
die ()
{
die_flag = 1;
}
|
