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<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%"><div id="lc1">#!/usr/bin/env python
</div><div id="lc2">#
</div><div id="lc3"># based on http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731
</div><div id="lc4">
</div><div id="lc5">import os, pwd, grp
</div><div id="lc6">
</div><div id="lc7">def daemonize(euid = None, egid = None):
</div><div id="lc8"> &quot;&quot;&quot;Detach a process from the controlling terminal,
</div><div id="lc9"> change euid/egid and run it in the background as a daemon.
</div><div id="lc10"> &quot;&quot;&quot;
</div><div id="lc11"> try:
</div><div id="lc12"> pid = os.fork()
</div><div id="lc13"> except OSError, e:
</div><div id="lc14"> raise Exception, &quot;%s [%d]&quot; % (e.strerror, e.errno)
</div><div id="lc15"> if (pid == 0):
</div><div id="lc16"> os.setsid()
</div><div id="lc17"> try:
</div><div id="lc18"> pid = os.fork()
</div><div id="lc19"> except OSError, e:
</div><div id="lc20"> raise Exception, &quot;%s [%d]&quot; % (e.strerror, e.errno)
</div><div id="lc21"> if (pid == 0):
</div><div id="lc22"> os.chdir(&#39;/&#39;)
</div><div id="lc23"> os.umask(0)
</div><div id="lc24"> else:
</div><div id="lc25"> os._exit(0)
</div><div id="lc26"> else:
</div><div id="lc27"> os._exit(0)
</div><div id="lc28"> for fd in range(0, 2):
</div><div id="lc29"> os.close(fd)
</div><div id="lc30"> os.open(os.devnull, os.O_RDONLY) # fd0 stdin
</div><div id="lc31"> os.open(os.devnull, os.O_WRONLY) # fd1 sdtout
</div><div id="lc32"> os.dup2(1, 2) # fd2 stderr
</div><div id="lc33"> if euid:
</div><div id="lc34"> os.seteuid(pwd.getpwnam(euid)[2])
</div><div id="lc35"> if egid:
</div><div id="lc36"> os.setegid(grp.getgrnam(egid)[2])
</div></pre></div>
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[color=#408080][i]#!/usr/bin/env python[/i][/color]
[color=#408080][i]#[/i][/color]
[color=#408080][i]# based on http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731[/i][/color]

[color=#008000][b]import[/b][/color] [color=#0000FF][b]os[/b][/color][color=#666666],[/color] [color=#0000FF][b]pwd[/b][/color][color=#666666],[/color] [color=#0000FF][b]grp[/b][/color]

[color=#008000][b]def[/b][/color] [color=#0000FF]daemonize[/color](euid [color=#666666]=[/color] [color=#008000]None[/color], egid [color=#666666]=[/color] [color=#008000]None[/color]):
    [color=#BA2121][i]"""Detach a process from the controlling terminal,
    change euid/egid and run it in the background as a daemon.
    """[/i][/color]
    [color=#008000][b]try[/b][/color]:
        pid [color=#666666]=[/color] os[color=#666666].[/color]fork()
    [color=#008000][b]except[/b][/color] [color=#D2413A][b]OSError[/b][/color], e:
        [color=#008000][b]raise[/b][/color] [color=#D2413A][b]Exception[/b][/color], [color=#BA2121]"[/color][color=#BB6688][b]%s[/b][/color][color=#BA2121] [[/color][color=#BB6688][b]%d[/b][/color][color=#BA2121]]"[/color] [color=#666666]%[/color] (e[color=#666666].[/color]strerror, e[color=#666666].[/color]errno)
    [color=#008000][b]if[/b][/color] (pid [color=#666666]==[/color] [color=#666666]0[/color]):
        os[color=#666666].[/color]setsid()
        [color=#008000][b]try[/b][/color]:
            pid [color=#666666]=[/color] os[color=#666666].[/color]fork()
        [color=#008000][b]except[/b][/color] [color=#D2413A][b]OSError[/b][/color], e:
            [color=#008000][b]raise[/b][/color] [color=#D2413A][b]Exception[/b][/color], [color=#BA2121]"[/color][color=#BB6688][b]%s[/b][/color][color=#BA2121] [[/color][color=#BB6688][b]%d[/b][/color][color=#BA2121]]"[/color] [color=#666666]%[/color] (e[color=#666666].[/color]strerror, e[color=#666666].[/color]errno)
        [color=#008000][b]if[/b][/color] (pid [color=#666666]==[/color] [color=#666666]0[/color]):
            os[color=#666666].[/color]chdir([color=#BA2121]'/'[/color])
            os[color=#666666].[/color]umask([color=#666666]0[/color])
        [color=#008000][b]else[/b][/color]:
            os[color=#666666].[/color]_exit([color=#666666]0[/color])
    [color=#008000][b]else[/b][/color]:
        os[color=#666666].[/color]_exit([color=#666666]0[/color])
    [color=#008000][b]for[/b][/color] fd [color=#AA22FF][b]in[/b][/color] [color=#008000]range[/color]([color=#666666]0[/color], [color=#666666]2[/color]):
        os[color=#666666].[/color]close(fd)
    os[color=#666666].[/color]open(os[color=#666666].[/color]devnull, os[color=#666666].[/color]O_RDONLY) [color=#408080][i]# fd0 stdin[/i][/color]
    os[color=#666666].[/color]open(os[color=#666666].[/color]devnull, os[color=#666666].[/color]O_WRONLY) [color=#408080][i]# fd1 sdtout[/i][/color]
    os[color=#666666].[/color]dup2([color=#666666]1[/color], [color=#666666]2[/color]) [color=#408080][i]# fd2 stderr[/i][/color]
    [color=#008000][b]if[/b][/color] euid:
        os[color=#666666].[/color]seteuid(pwd[color=#666666].[/color]getpwnam(euid)[[color=#666666]2[/color]])
    [color=#008000][b]if[/b][/color] egid:
        os[color=#666666].[/color]setegid(grp[color=#666666].[/color]getgrnam(egid)[[color=#666666]2[/color]])

--------------------------------------
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<div class="highlight"><pre><div id="lc1">#!/usr/bin/env python
</div><div id="lc2">#
</div><div id="lc3"># based on http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731
</div><div id="lc4">
</div><div id="lc5">import os, pwd, grp
</div><div id="lc6">
</div><div id="lc7">def daemonize(euid = None, egid = None):
</div><div id="lc8"> &quot;&quot;&quot;Detach a process from the controlling terminal,
</div><div id="lc9"> change euid/egid and run it in the background as a daemon.
</div><div id="lc10"> &quot;&quot;&quot;
</div><div id="lc11"> try:
</div><div id="lc12"> pid = os.fork()
</div><div id="lc13"> except OSError, e:
</div><div id="lc14"> raise Exception, &quot;%s [%d]&quot; % (e.strerror, e.errno)
</div><div id="lc15"> if (pid == 0):
</div><div id="lc16"> os.setsid()
</div><div id="lc17"> try:
</div><div id="lc18"> pid = os.fork()
</div><div id="lc19"> except OSError, e:
</div><div id="lc20"> raise Exception, &quot;%s [%d]&quot; % (e.strerror, e.errno)
</div><div id="lc21"> if (pid == 0):
</div><div id="lc22"> os.chdir(&#39;/&#39;)
</div><div id="lc23"> os.umask(0)
</div><div id="lc24"> else:
</div><div id="lc25"> os._exit(0)
</div><div id="lc26"> else:
</div><div id="lc27"> os._exit(0)
</div><div id="lc28"> for fd in range(0, 2):
</div><div id="lc29"> os.close(fd)
</div><div id="lc30"> os.open(os.devnull, os.O_RDONLY) # fd0 stdin
</div><div id="lc31"> os.open(os.devnull, os.O_WRONLY) # fd1 sdtout
</div><div id="lc32"> os.dup2(1, 2) # fd2 stderr
</div><div id="lc33"> if euid:
</div><div id="lc34"> os.seteuid(pwd.getpwnam(euid)[2])
</div><div id="lc35"> if egid:
</div><div id="lc36"> os.setegid(grp.getgrnam(egid)[2])
</div></pre></div>
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<blockquote><code>#!/usr/bin/env&nbsp;python
#
#&nbsp;based&nbsp;on&nbsp;http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731

import&nbsp;os,&nbsp;pwd,&nbsp;grp

def&nbsp;daemonize(euid&nbsp;=&nbsp;None,&nbsp;egid&nbsp;=&nbsp;None):
&nbsp;&nbsp;&nbsp;&nbsp;&quot;&quot;&quot;Detach&nbsp;a&nbsp;process&nbsp;from&nbsp;the&nbsp;controlling&nbsp;terminal,
&nbsp;&nbsp;&nbsp;&nbsp;change&nbsp;euid/egid&nbsp;and&nbsp;run&nbsp;it&nbsp;in&nbsp;the&nbsp;background&nbsp;as&nbsp;a&nbsp;daemon.
&nbsp;&nbsp;&nbsp;&nbsp;&quot;&quot;&quot;
&nbsp;&nbsp;&nbsp;&nbsp;try:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pid&nbsp;=&nbsp;os.fork()
&nbsp;&nbsp;&nbsp;&nbsp;except&nbsp;OSError,&nbsp;e:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;raise&nbsp;Exception,&nbsp;&quot;%s&nbsp;[%d]&quot;&nbsp;%&nbsp;(e.strerror,&nbsp;e.errno)
&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(pid&nbsp;==&nbsp;0):
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;os.setsid()
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pid&nbsp;=&nbsp;os.fork()
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;except&nbsp;OSError,&nbsp;e:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;raise&nbsp;Exception,&nbsp;&quot;%s&nbsp;[%d]&quot;&nbsp;%&nbsp;(e.strerror,&nbsp;e.errno)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(pid&nbsp;==&nbsp;0):
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;os.chdir(&#39;/&#39;)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;os.umask(0)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;os._exit(0)
&nbsp;&nbsp;&nbsp;&nbsp;else:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;os._exit(0)
&nbsp;&nbsp;&nbsp;&nbsp;for&nbsp;fd&nbsp;in&nbsp;range(0,&nbsp;2):
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;os.close(fd)
&nbsp;&nbsp;&nbsp;&nbsp;os.open(os.devnull,&nbsp;os.O_RDONLY)&nbsp;#&nbsp;fd0&nbsp;stdin
&nbsp;&nbsp;&nbsp;&nbsp;os.open(os.devnull,&nbsp;os.O_WRONLY)&nbsp;#&nbsp;fd1&nbsp;sdtout
&nbsp;&nbsp;&nbsp;&nbsp;os.dup2(1,&nbsp;2)&nbsp;#&nbsp;fd2&nbsp;stderr
&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;euid:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;os.seteuid(pwd.getpwnam(euid)[2])
&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;egid:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;os.setegid(grp.getgrnam(egid)[2])
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