1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
import os
import sys
import string
from tkinter import *
from tkinter.scrolledtext import ScrolledText
from tkinter.dialog import Dialog
import signal
BUFSIZE = 512
class ShellWindow(ScrolledText):
def __init__(self, master=None, shell=None, **cnf):
if not shell:
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, 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 - 1 char")
self.yview_pickplace(END)
def inputhandler(self, *args):
if not self.pid:
self.no_process()
return "break"
self.insert(END, "\n")
line = self.get(self.pos, "end - 1 char")
self.pos = self.index(END)
os.write(self.tochild, line)
return "break"
def sendeof(self, *args):
if not self.pid:
self.no_process()
return "break"
os.close(self.tochild)
return "break"
def sendsig(self, sig):
if not self.pid:
self.no_process()
return "break"
os.kill(self.pid, sig)
return "break"
def sigint(self, *args):
return self.sendsig(signal.SIGINT)
def sigquit(self, *args):
return self.sendsig(signal.SIGQUIT)
def sigterm(self, *args):
return self.sendsig(signal.SIGTERM)
def sigkill(self, *args):
return self.sendsig(signal.SIGKILL)
def no_process(self):
Dialog(self.master,
text="No active process",
title="No process",
bitmap='error',
default=0,
strings=('OK',))
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
for i in 0, 1, 2:
try:
os.close(i)
except os.error:
pass
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')
os.closerange(3, MAXFD)
try:
os.execvp(prog, args)
finally:
sys.stderr.write('execvp failed\n')
os._exit(1)
os.close(p2cread)
os.close(c2pwrite)
return pid, c2pread, p2cwrite
def test():
shell = string.join(sys.argv[1:])
root = Tk()
root.minsize(1, 1)
if shell:
w = ShellWindow(root, shell=shell)
else:
w = ShellWindow(root)
w.pack(expand=1, fill=BOTH)
w.focus_set()
w.tk.mainloop()
if __name__ == '__main__':
test()
|
