source: titan/mediathek/localhoster/lib/python2.7/commands.py @ 40114

Last change on this file since 40114 was 40094, checked in by obi, 5 years ago

tithek add yoztube-dl support

File size: 2.5 KB
Line 
1"""Execute shell commands via os.popen() and return status, output.
2
3Interface summary:
4
5       import commands
6
7       outtext = commands.getoutput(cmd)
8       (exitstatus, outtext) = commands.getstatusoutput(cmd)
9       outtext = commands.getstatus(file)  # returns output of "ls -ld file"
10
11A trailing newline is removed from the output string.
12
13Encapsulates the basic operation:
14
15      pipe = os.popen('{ ' + cmd + '; } 2>&1', 'r')
16      text = pipe.read()
17      sts = pipe.close()
18
19 [Note:  it would be nice to add functions to interpret the exit status.]
20"""
21from warnings import warnpy3k
22warnpy3k("the commands module has been removed in Python 3.0; "
23         "use the subprocess module instead", stacklevel=2)
24del warnpy3k
25
26__all__ = ["getstatusoutput","getoutput","getstatus"]
27
28# Module 'commands'
29#
30# Various tools for executing commands and looking at their output and status.
31#
32# NB This only works (and is only relevant) for UNIX.
33
34
35# Get 'ls -l' status for an object into a string
36#
37def getstatus(file):
38    """Return output of "ls -ld <file>" in a string."""
39    import warnings
40    warnings.warn("commands.getstatus() is deprecated", DeprecationWarning, 2)
41    return getoutput('ls -ld' + mkarg(file))
42
43
44# Get the output from a shell command into a string.
45# The exit status is ignored; a trailing newline is stripped.
46# Assume the command will work with '{ ... ; } 2>&1' around it..
47#
48def getoutput(cmd):
49    """Return output (stdout or stderr) of executing cmd in a shell."""
50    return getstatusoutput(cmd)[1]
51
52
53# Ditto but preserving the exit status.
54# Returns a pair (sts, output)
55#
56def getstatusoutput(cmd):
57    """Return (status, output) of executing cmd in a shell."""
58    import os
59    pipe = os.popen('{ ' + cmd + '; } 2>&1', 'r')
60    text = pipe.read()
61    sts = pipe.close()
62    if sts is None: sts = 0
63    if text[-1:] == '\n': text = text[:-1]
64    return sts, text
65
66
67# Make command argument from directory and pathname (prefix space, add quotes).
68#
69def mk2arg(head, x):
70    import os
71    return mkarg(os.path.join(head, x))
72
73
74# Make a shell command argument from a string.
75# Return a string beginning with a space followed by a shell-quoted
76# version of the argument.
77# Two strategies: enclose in single quotes if it contains none;
78# otherwise, enclose in double quotes and prefix quotable characters
79# with backslash.
80#
81def mkarg(x):
82    if '\'' not in x:
83        return ' \'' + x + '\''
84    s = ' "'
85    for c in x:
86        if c in '\\$"`':
87            s = s + '\\'
88        s = s + c
89    s = s + '"'
90    return s
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