Solved

bash and sh-compatibility

Posted on 2002-05-15
3
1,075 Views
Last Modified: 2008-01-16
bash claims to be sh-compatible in it's man-page. This seems to be wrong:

     echo 1>file
and
     echo 0>file
and
     # as many other examples as you like ..

is valid sh syntax.

Does somebody know how to tell bash to be sh-compatible?
Or is there a free (GPL or whatever) sh for Linux?
0
Comment
Question by:ahoffmann
  • 2
3 Comments
 
LVL 40

Accepted Solution

by:
jlevie earned 100 total points
ID: 7012396
If you are talking about the differences with using echo under sh vs echo under bash then you aren't actually talking about shell incompatiblity. In some implementations of sh echo is a built in and in other's it isn't. Furthermore, each system seems to have a different idea of exactly what echo does and how it behaves. If you examine very many spohisticated multi-platform scripts (or try to write same) you'll find that they frequently go to a lot of trouble to figure out what flavor of echo is available.

I'd be interested in places that you see incompatibility that  only involve the standard Bourne shell commands.
0
 
LVL 51

Author Comment

by:ahoffmann
ID: 7012505
damn, should have thought about built in echo, 'cause I'm used to some other dragons with it too ;-)

Anyway it behaves equal in both: bash and sh (Solaris, didn't check carefully)

> I'd be interested in places that you see incompatibility that  only involve the standard Bourne shell commands
see : command
0
 
LVL 40

Expert Comment

by:jlevie
ID: 7012828
Personally I've never found any cases of valid Bourne shell syntax that Bash wouldn't execute, assuming that builtin vs not-builtin aren't an issue. The reverse is not true. Bash has some features (e.g., export, etc) that Bourne shell doesn't.
0

Featured Post

Enterprise Mobility and BYOD For Dummies

Like “For Dummies” books, you can read this in whatever order you choose and learn about mobility and BYOD; and how to put a competitive mobile infrastructure in place. Developed for SMBs and large enterprises alike, you will find helpful use cases, planning, and implementation.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
shell script or linux command to upload a directory to artifactory? 2 131
AWS - HAProxy- KeepAlived 5 43
Ubunto LTS Server 16.04 for Intel Processors 2 44
awk sed 8 43
1. Introduction As many people are interested in Linux but not as many are interested or knowledgeable (enough) to install Linux on their system, here is a safe way to try out Linux on your existing (Windows) system. The idea is that you insta…
It’s 2016. Password authentication should be dead — or at least close to dying. But, unfortunately, it has not traversed Quagga stage yet. Using password authentication is like laundering hotel guest linens with a washboard — it’s Passé.
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question