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import os
import sys
import string
from Tkinter import *
from ScrolledText import ScrolledText
from Dialog import Dialog
import signal
TK_READABLE = 1
TK_WRITABLE = 2
TK_EXCEPTION = 4
BUFSIZE = 512
class ShellWindow(ScrolledText):
def __init__(self, master = None, cnf = {}):
try:
shell = cnf['shell']
del cnf['shell']
except KeyError:
try:
shell = os.environ['SHELL']
except KeyError:
shell = '/bin/sh'
shell = shell + ' -i'
args = string.split(shell)
shell = args[0]
ScrolledText.__init__(self, master, cnf)
self.pos = '1.0'
self.bind('<Return>', self.inputhandler)
self.bind('<Control-c>', self.sigint)
self.bind('<Control-t>', self.sigterm)
self.bind('<Control-k>', self.sigkill)
self.bind('<Control-d>', self.sendeof)
self.pid, self.fromchild, self.tochild = spawn(shell, args)
self.tk.createfilehandler(self.fromchild, TK_READABLE,
self.outputhandler)
def outputhandler(self, file, mask):
data = os.read(file, BUFSIZE)
if not data:
self.tk.deletefilehandler(file)
pid, sts = os.waitpid(self.pid, 0)
print 'pid', pid, 'status', sts
self.pid = None
detail = sts>>8
cause = sts & 0xff
if cause == 0:
msg = "exit status %d" % detail
else:
msg = "killed by signal %d" % (cause & 0x7f)
if cause & 0x80:
msg = msg + " -- core dumped"
Dialog(self.master, {
'text': msg,
'title': "Exit status",
'bitmap': 'warning',
'default': 0,
'strings': ('OK',),
})
return
self.insert('end', data)
self.pos = self.index('end')
self.yview_pickplace('end')
def inputhandler(self, *args):
if not self.pid:
Dialog(self.master, {
'text': "No active process",
'title': "No process",
'bitmap': 'error',
'default': 0,
'strings': ('OK',),
})
return
self.insert('end', '\n')
line = self.get(self.pos, 'end')
self.pos = self.index('end')
os.write(self.tochild, line)
def sendeof(self, *args):
if not self.pid:
Dialog(self.master, {
'text': "No active process",
'title': "No process",
'bitmap': 'error',
'default': 0,
'strings': ('OK',),
})
return
os.close(self.tochild)
def sendsig(self, sig):
if not self.pid:
Dialog(self.master, {
'text': "No active process",
'title': "No process",
'bitmap': 'error',
'default': 0,
'strings': ('OK',),
})
return
os.kill(self.pid, sig)
def sigint(self, *args):
self.sendsig(signal.SIGINT)
def sigquit(self, *args):
self.sendsig(signal.SIGQUIT)
def sigterm(self, *args):
self.sendsig(signal.SIGTERM)
def sigkill(self, *args):
self.sendsig(signal.SIGKILL)
MAXFD = 100 # Max number of file descriptors (os.getdtablesize()???)
def spawn(prog, args):
p2cread, p2cwrite = os.pipe()
c2pread, c2pwrite = os.pipe()
pid = os.fork()
if pid == 0:
# Child
os.close(0)
os.close(1)
os.close(2)
if os.dup(p2cread) <> 0:
sys.stderr.write('popen2: bad read dup\n')
if os.dup(c2pwrite) <> 1:
sys.stderr.write('popen2: bad write dup\n')
if os.dup(c2pwrite) <> 2:
sys.stderr.write('popen2: bad write dup\n')
for i in range(3, MAXFD):
try:
os.close(i)
except:
pass
try:
os.execvp(prog, args)
finally:
print 'execvp failed'
os._exit(1)
os.close(p2cread)
os.close(c2pwrite)
return pid, c2pread, p2cwrite
def test():
shell = string.join(sys.argv[1:])
cnf = {}
if shell:
cnf['shell'] = shell
root = Tk()
root.minsize(1, 1)
w = ShellWindow(root, cnf)
w.pack({'expand': 1, 'fill': 'both'})
w.focus_set()
w.tk.mainloop()
if __name__ == '__main__':
test()
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