File exenv-20251101.46c5da5.obscpio of Package exenv
07070100000000000081A400000000000000000000000169061A6100000005000000000000000000000000000000000000002200000000exenv-20251101.46c5da5/.gitignorebuild07070100000001000081A400000000000000000000000169061A6100000183000000000000000000000000000000000000002000000000exenv-20251101.46c5da5/MakefilePREFIX ?= /usr/local
BINDIR = $(PREFIX)/bin
MANDIR = $(PREFIX)/share/man/man1
SRC=exenv.py
build/exenv: build
cp $(SRC) build/exenv
chmod +x build/exenv
build:
mkdir -p build
clean:
rm -rf build
README.html: exenv.1
pandoc -f man -t html -o README.html exenv.1
install: build/exenv exenv.1
install -D -m 755 -t $(BINDIR) build/exenv
install -D -m 644 -t $(MANDIR) exenv.1
07070100000002000081A400000000000000000000000169061A6100000753000000000000000000000000000000000000002300000000exenv-20251101.46c5da5/README.html<h1>NAME</h1>
<p>exenv - execute a command with the environment of a specified
process</p>
<h1>SYNOPSIS</h1>
<p><strong>exenv</strong> <PID> <command> [args]</p>
<h1>DESCRIPTION</h1>
<p>The <strong>exenv</strong> command allows you to execute a new
process with the same environment variables as a specified running
process.</p>
<dl>
<dt><strong><PID></strong></dt>
<dd>
<p>The process ID of the existing process whose environment variables
you want to use.</p>
</dd>
</dl>
<dl>
<dt><strong><command></strong></dt>
<dd>
<p>The command to execute. This can include script names or
binaries.</p>
</dd>
</dl>
<dl>
<dt><strong>[args]</strong></dt>
<dd>
<p>Optional arguments to pass to the command.</p>
<p>If the specified <strong><PID></strong> is not valid, or if
permission is denied when trying to access the environment of the
specified process, the program will output an error message and
terminate.</p>
</dd>
</dl>
<h1>EXAMPLES</h1>
<p>To execute a command using the environment variables from the process
with PID 1234 obtaining environment variables required to run Xorg
application:</p>
<blockquote>
<p><strong>exenv 1234 /usr/bin/xclip -o</strong></p>
</blockquote>
<p>To use SSH agent of running process you can use:</p>
<blockquote>
<p><strong>exenv 2345 ssh user@server</strong></p>
</blockquote>
<p>To use environment of running process and add something extra:</p>
<blockquote>
<p><strong>exenv 3456 env FOO=bar /usr/bin/some_command --with-args
yes</strong></p>
</blockquote>
<h1>COPYRIGHT</h1>
<p>Copyright © 2025 Tomáš Čech <sleep_walker@gnu.org></p>
<p>License GPLv3+: GNU GPL version 3 or later
<https://gnu.org/licenses/gpl.html>.</p>
<p><br />
This is free software: you are free to change and redistribute it. There
is NO WARRANTY, to the extent permitted by law.</p>
<h1>SEE ALSO</h1>
<p>bash(1), sh(1)</p>
07070100000003000081A400000000000000000000000169061A61000005DE000000000000000000000000000000000000001F00000000exenv-20251101.46c5da5/exenv.1.\" Man page for exenv
.TH EXENV 1 "October 2023" "1.0" "User Commands"
.SH NAME
exenv \- execute a command in the environment of a specified process
.SH SYNOPSIS
.B exenv
<PID> <command> [args]
.SH DESCRIPTION
The
.B exenv
command allows you to execute a new process with the same environment variables as a specified running process.
.TP
.B <PID>
The process ID of the existing process whose environment variables you want to use.
.TP
.B <command>
The command to execute. This can include script names or binaries.
.TP
.B [args]
Optional arguments to pass to the command.
If the specified
.B <PID>
is not valid, or if permission is denied when trying to access the environment of the specified process, the program will output an error message and terminate.
.SH EXAMPLES
To execute a command using the environment variables from the process with PID 1234 obtaining environment variables required to run Xorg application:
.RS
.B exenv 1234 /usr/bin/xclip -o
.RE
To use SSH agent of running process you can use:
.RS
.B exenv 2345 ssh user@server
.RE
To use environment of running process and add something extra:
.RS
.B exenv 3456 env FOO=bar /usr/bin/some_command --with-args yes
.RE
.SH COPYRIGHT
Copyright \(co 2025 Tomáš Čech <sleep_walker@gnu.org>
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
.br
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
.SH SEE ALSO
execvpe(2)
07070100000004000081A400000000000000000000000169061A610000069A000000000000000000000000000000000000002000000000exenv-20251101.46c5da5/exenv.py#!/usr/bin/env python3
import os
import sys
class EnvError(Exception):
pass
class ExecError(Exception):
pass
def read_env_variables(pid):
try:
with open('/proc/{pid}/environ'.format(pid=pid), 'r') as f:
env_vars = f.read().split('\0')
return {
name: value
for var in env_vars if '=' in var
for name, _, value in [var.partition('=')]
}
except FileNotFoundError as e:
raise EnvError("Process with PID {pid} not found".format(pid=pid)) from e
except PermissionError as e:
raise EnvError("Permission denied: Cannot read the environment variables of the process.") from e
def exec_process_with_env(pid, command):
env_vars = read_env_variables(pid)
if env_vars is not None:
env = {key: value for key, value in env_vars.items()}
try:
os.execvpe(command[0], command, env)
except Exception as e:
print("Failed to execute command: {e}".format(e=e))
sys.exit(1)
def print_usage():
print("Usage: exenv <PID> <command> [args]")
def parse_command_line():
if len(sys.argv) < 3:
print_usage()
sys.exit(1)
try:
pid = int(sys.argv[1])
except ValueError:
print("Invalid PID: {pid}".format(pid=sys.argv[1]))
print_usage()
sys.exit(1)
command = sys.argv[2:]
return pid, command
def main():
pid, command = parse_command_line()
try:
exec_process_with_env(pid, command)
except (EnvError, ExecError) as e:
print(e)
sys.exit(1)
if __name__ == "__main__":
main()
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