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/* watch.c - Execute a program periodically
*
* Copyright 2013 Sandeep Sharma <sandeep.jack2756@gmail.com>
* Copyright 2013 Kyungwan Han <asura321@gmail.com>
*
USE_WATCH(NEWTOY(watch, "^<1n#<0=2t", TOYFLAG_USR|TOYFLAG_BIN))
config WATCH
bool "watch"
default n
help
Usage: watch [-n SEC] [-t] PROG ARGS
Run PROG periodically
-n Loop period in seconds (default 2)
-t Don't print header
*/
#define FOR_watch
#include "toys.h"
GLOBALS(
int interval;
)
void watch_main(void)
{
int i = 0, hlen;
time_t t;
unsigned width = 80, len = sizeof("1234-67-90 23:56:89");//time format
char *header, *cmd = *toys.optargs;
while(toys.optargs[++i]) cmd = xmsprintf("%s %s", cmd, toys.optargs[i]);
header = xmsprintf("Every %us: %s", TT.interval, cmd);
while(1) {
xprintf("\033[H\033[J");
if(!(toys.optflags & FLAG_t)) {
xprintf("%s", header);
hlen = strlen(header);
terminal_size(&width, NULL);
if (!width) width = 80; //on serial it may return 0.
if (width > (hlen + len)) {
time(&t);
strftime(toybuf, len, "%Y-%m-%d %H:%M:%S", localtime(&t));
xprintf("%*s", width - hlen, toybuf);
}
xprintf("\n\n"); // 1'\n' for space between header and result
}
fflush(NULL); //making sure the screen is clear
system(cmd);
sleep(TT.interval);
}
if (CFG_TOYBOX_FREE) free(header);
}
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