Gentoo Archives: gentoo-user

From: Florian Philipp <lists@×××××××××××.net>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] crontab not executing
Date: Mon, 20 Jun 2011 12:12:40
Message-Id: 4DFF34BF.40008@binarywings.net
In Reply to: Re: [gentoo-user] crontab not executing by Adam Carter
1 Am 20.06.2011 12:39, schrieb Adam Carter:
2 >>> /bin/sh is a symlink to bash.
3 >>
4 >> Which runs as sh when run from the symlink.
5 >
6 > I dont understand. "runs as" usually means "runs under the user
7 > context" to me - are you saying bash has an sh compatibility mode?
8 >
9
10 Yes, that's exactly what he wants to say.
11 Interestingly, that mode still supports most bash-only features like
12 arrays. I guess they can do this because it doesn't change the semantic
13 of old Bourne shell code. It just makes some formerly invalid syntax valid.
14
15 /bin/sh -c -c 'array=( sh bash ); echo I am a ${array[1]}' 2>/dev/null
16 || echo I am a sh
17 > I am a bash
18
19 Other drop-in replacements for /bin/sh like dash are less forgiving:
20
21 /bin/dash -c -c 'array=( sh bash ); echo I am a ${array[1]}' 2>/dev/null
22 || echo I am a sh
23 > I am a sh

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