forked from iovisor/bcc
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathexec.py
More file actions
66 lines (57 loc) · 1.67 KB
/
Copy pathexec.py
File metadata and controls
66 lines (57 loc) · 1.67 KB
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
# Copyright 2025 Rocky Xing
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import signal
import sys
child_exit = 0
pipe_read, pipe_write = os.pipe()
def _child_signal_handler(signum, frame):
while True:
try:
pid, status = os.waitpid(-1, os.WNOHANG)
if pid == 0:
break
except OSError:
break
global child_exit
child_exit = 1
def run_cmd(args) -> int:
pid = os.fork()
if pid < 0:
print("failed to fork", file=sys.stderr)
sys.exit(1)
elif pid == 0:
try:
os.close(pipe_write)
os.read(pipe_read, 1)
os.execvp(args[0], args)
except OSError as e:
print("failed to exec command: %s: %s" % (' '.join(args), e), file=sys.stderr)
sys.exit(1)
finally:
os.close(pipe_read)
sys.exit(0)
else:
signal.signal(signal.SIGCHLD, _child_signal_handler)
return pid
def cmd_ready():
try:
os.close(pipe_read)
os.write(pipe_write, b'x')
except OSError as e:
sys.exit(1)
finally:
os.close(pipe_write)
def cmd_exited():
return child_exit