mirror of
https://github.com/python/cpython.git
synced 2024-11-28 12:31:14 +08:00
55 lines
1.2 KiB
Python
55 lines
1.2 KiB
Python
# Module 'commands'
|
|
#
|
|
# Various tools for executing commands and looking at their output and status.
|
|
|
|
|
|
# Get 'ls -l' status for an object into a string
|
|
#
|
|
def getstatus(file):
|
|
return getoutput('ls -ld' + mkarg(file))
|
|
|
|
|
|
# Get the output from a shell command into a string.
|
|
# The exit status is ignored; a trailing newline is stripped.
|
|
# Assume the command will work with '{ ... ; } 2>&1' around it..
|
|
#
|
|
def getoutput(cmd):
|
|
return getstatusoutput(cmd)[1]
|
|
|
|
|
|
# Ditto but preserving the exit status.
|
|
# Returns a pair (sts, output)
|
|
#
|
|
def getstatusoutput(cmd):
|
|
import posix
|
|
pipe = posix.popen('{ ' + cmd + '; } 2>&1', 'r')
|
|
text = pipe.read()
|
|
sts = pipe.close()
|
|
if sts = None: sts = 0
|
|
if text[-1:] = '\n': text = text[:-1]
|
|
return sts, text
|
|
|
|
|
|
# Make command argument from directory and pathname (prefix space, add quotes).
|
|
#
|
|
def mk2arg(head, x):
|
|
import path
|
|
return mkarg(path.join(head, x))
|
|
|
|
|
|
# Make a shell command argument from a string.
|
|
# Two strategies: enclose in single quotes if it contains none;
|
|
# otherwise, enclose in double quotes and prefix quotable characters
|
|
# with backslash.
|
|
#
|
|
def mkarg(x):
|
|
if '\'' not in x:
|
|
return ' \'' + x + '\''
|
|
s = ' "'
|
|
for c in x:
|
|
if c in '\\$"':
|
|
s = s + '\\'
|
|
s = s + c
|
|
s = s + '"'
|
|
return s
|