File: shell.py

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (34 lines) | stat: -rw-r--r-- 816 bytes parent folder | download | duplicates (17) 
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
 
"""
Launch a process (given through argv) similar to how a shell would do it.
"""

import signal
import subprocess
import sys
import os


def preexec_fn():
    # Block SIGTTOU generated by the tcsetpgrp call
    orig_mask = signal.pthread_sigmask(signal.SIG_BLOCK, [signal.SIGTTOU])

    # Put us in a new process group.
    os.setpgid(0, 0)

    # And put it in the foreground.
    fd = os.open("/dev/tty", os.O_RDONLY)
    os.tcsetpgrp(fd, os.getpgid(0))
    os.close(fd)

    signal.pthread_sigmask(signal.SIG_SETMASK, orig_mask)


if __name__ == "__main__":
    child = subprocess.Popen(sys.argv[1:], preexec_fn=preexec_fn)
    print("PID=%d" % child.pid)

    _, status = os.waitpid(child.pid, os.WUNTRACED)
    print("STATUS=%d" % status)

    returncode = child.wait()
    print("RETURNCODE=%d" % returncode)