/usr/share/pyshared/fltk/test/tty.py is in python-fltk 1.3.0-1.
This file is owned by root:root, with mode 0o644.
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# "$Id: adjuster.py 35 2003-09-29 21:39:48Z andreasheld $"
#
# Adjuster test program for pyFLTK the Python bindings
# for the Fast Light Tool Kit (FLTK).
#
# FLTK copyright 1998-1999 by Bill Spitzak and others.
# pyFLTK copyright 2003 by Andreas Held and others.
#
# This library is free software you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with this library if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA.
#
# Please report all bugs and problems to "pyfltk-user@lists.sourceforge.net".
#
from fltk import *
import sys, os
#
# fltk-ttys - Open several processes, display their output in fltk widgets
# Greg Ercolano 02/21/2005 1.00
#
# Globals
G_disp = [0,0,0]; # one display per child
G_buff = [0,0,0]; # one buffer per child
G_outfd = [0,0,0]; # read pipe for childs stderr, one per child
G_pids = [0,0,0] # pid for each child
# Start child process, makes a read pipe to its stderr
def start_child(t):
global G_pids
#int out[2]; pipe(out);
out = os.pipe()
G_pids[t] = os.fork()
print "pid = ", G_pids[t]
#G_pids[t] = -1
if G_pids[t] == -1:
# error
os.close(out[0])
os.close(out[1])
elif G_pids[t] == 0:
# child
os.close(out[0])
os.dup2(out[1],2)
os.close(out[1])
if t == 0:
os.execlp("/bin/sh", "sh", "-c", "ps auxww 1>&2")
print "execlp(ps)"
#perror("execlp(ps)")
sys.exit(1)
elif t == 1:
os.execlp("/bin/sh", "sh", "-c", "perl -e 'for($t=0; sleep(1); $t++) {print STDERR rand().\"\\n\"; if ($t>5) {kill(9,$$);}}' 1>&2")
print "execlp(perl)"
#perror("excelp(perl)")
sys.exit(1)
elif t == 2:
os.execlp("/bin/sh", "sh", "-c", "(ls -la; ping -c 8 localhost) 1>&2")
#perror("execlp(ls/ping)")
print "execlp(ls/ping)"
sys.exit(1)
else:
# parent
G_outfd[t] = out[0]
os.close(out[1])
# Data ready interrupt
def data_ready(fd, data):
t = data
s = ""
bytes = os.read(fd, 4096-1);
#print "Data ready for %d"%t
# fprintf(stderr, "Data ready for %d) pid=%ld fd=%d bytes=%d\n", t, (long)G_pids[t], fd, bytes);
if len(bytes) == 0: # EOF
G_buff[t].append("\n\n*** EOF ***\n")
try:
(pid,status) = os.waitpid(G_pids[t], os.WNOHANG)
except:
bytes = "waitpid(): no child process\n"
else:
if os.WIFEXITED(status):
bytes = "Exit=%d\n"%os.WEXITSTATUS(status)
os.close(fd)
Fl.remove_fd(fd)
G_pids[t] = -1
elif os.WIFSIGNALED(status):
bytes = "Killed with %d\n"%os.WTERMSIG(status)
os.close(fd)
Fl.remove_fd(fd)
G_pids[t] = -1
elif os.WIFSTOPPED(status):
bytes = "Stopped with %d\n"%os.WSTOPSIG(status)
G_buff[t].append(bytes)
else: # DATA
G_buff[t].append(bytes)
# Clean up if someone closes the window
def close_cb(widget):
print "Killing child processes..\n"
for t in range(3):
if G_pids[t] == -1:
continue
os.kill(G_pids[t], 9)
sys.exit(0)
if __name__=='__main__':
win = Fl_Double_Window(620,520,"fltk-tty");
win.callback(close_cb) # kill children if window closed
# Start children, one tty for each
for t in range(3):
start_child(t)
G_buff[t] = Fl_Text_Buffer()
G_disp[t] = Fl_Text_Display(10+t*200, 10, 200, 500)
G_disp[t].buffer(G_buff[t])
G_disp[t].textfont(FL_COURIER)
G_disp[t].textsize(12)
Fl.add_fd(G_outfd[t], data_ready, t)
win.resizable(win)
win.show()
Fl.run()
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