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-rw-r--r--Lib/commands.py77
1 files changed, 0 insertions, 77 deletions
diff --git a/Lib/commands.py b/Lib/commands.py
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index ee4db85..0000000
--- a/Lib/commands.py
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-"""Execute shell commands via os.popen() and return status, output.
-
-Interface summary:
-
- import commands
-
- outtext = commands.getoutput(cmd)
- (exitstatus, outtext) = commands.getstatusoutput(cmd)
- outtext = commands.getstatus(file) # returns output of "ls -ld file"
-
-A trailing newline is removed from the output string.
-
-Encapsulates the basic operation:
-
- pipe = os.popen('{ ' + cmd + '; } 2>&1', 'r')
- text = pipe.read()
- sts = pipe.close()
-
- [Note: it would be nice to add functions to interpret the exit status.]
-"""
-
-__all__ = ["getstatusoutput", "getoutput"]
-
-# Module 'commands'
-#
-# Various tools for executing commands and looking at their output and status.
-#
-# NB This only works (and is only relevant) for UNIX.
-
-
-# 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 output (stdout or stderr) of executing cmd in a shell."""
- return getstatusoutput(cmd)[1]
-
-
-# Ditto but preserving the exit status.
-# Returns a pair (sts, output)
-#
-def getstatusoutput(cmd):
- """Return (status, output) of executing cmd in a shell."""
- import os
- pipe = os.popen('{ ' + cmd + '; } 2>&1', 'r')
- text = pipe.read()
- sts = pipe.close()
- if sts is 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 os
- return mkarg(os.path.join(head, x))
-
-
-# Make a shell command argument from a string.
-# Return a string beginning with a space followed by a shell-quoted
-# version of the argument.
-# 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