diff options
| -rwxr-xr-x | Demo/curses/repeat.py | 46 |
1 files changed, 34 insertions, 12 deletions
diff --git a/Demo/curses/repeat.py b/Demo/curses/repeat.py index 1083239..93372c5 100755 --- a/Demo/curses/repeat.py +++ b/Demo/curses/repeat.py @@ -1,6 +1,6 @@ #! /usr/bin/env python -"""repeat <shell-command> +"""repeat [-i SECONDS] <shell-command> This simple program repeatedly (at 1-second intervals) executes the shell command given on the command line and displays the output (or as @@ -9,6 +9,8 @@ output on top of the old output, so that if nothing changes, the screen doesn't change. This is handy to watch for changes in e.g. a directory or process listing. +The -i option lets you override the sleep time between executions. + To end, hit Control-C. """ @@ -24,18 +26,30 @@ import os import sys import time import curses +import getopt def main(): - if not sys.argv[1:]: + interval = 1.0 + try: + opts, args = getopt.getopt(sys.argv[1:], "hi:") + except getopt.error as err: + print(err, file=sys.stderr) + sys.exit(2) + if not args: print(__doc__) sys.exit(0) - cmd = " ".join(sys.argv[1:]) - p = os.popen(cmd, "r") + for opt, arg in opts: + if opt == "-i": + interval = float(arg) + if opt == "-h": + print(__doc__) + sys.exit(0) + cmd = " ".join(args) + cmd_really = cmd + " 2>&1" + p = os.popen(cmd_really, "r") text = p.read() sts = p.close() - if sts: - print("Exit code:", sts, file=sys.stderr) - sys.exit(sts) + text = addsts(interval, cmd, text, sts) w = curses.initscr() try: while True: @@ -45,14 +59,22 @@ def main(): except curses.error: pass w.refresh() - time.sleep(1) - p = os.popen(cmd, "r") + time.sleep(interval) + p = os.popen(cmd_really, "r") text = p.read() sts = p.close() - if sts: - print("Exit code:", sts, file=sys.stderr) - sys.exit(sts) + text = addsts(interval, cmd, text, sts) finally: curses.endwin() +def addsts(interval, cmd, text, sts): + now = time.strftime("%H:%M:%S") + text = "%s, every %g sec: %s\n%s" % (now, interval, cmd, text) + if sts: + msg = "Exit status: %d; signal: %d" % (sts>>8, sts&0xFF) + if text and not text.endswith("\n"): + msg = "\n" + msg + text += msg + return text + main() |