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Issue with script in linux but in unix works

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Top Forums Shell Programming and Scripting Issue with script in linux but in unix works
# 8  
Old 05-01-2010
/bin/sh on linux is usually /bin/bash

and despite claims it's not compatible in my experience.
# 9  
Old 05-01-2010
Quote:
Originally Posted by bigearsbilly
/bin/sh on linux is usually /bin/bash

And if it's not, it will still be a POSIX shell.
Quote:
and despite claims it's not compatible in my experience.

Not compatible with what?

If you use bash extensions, then your script will not be compatible with the standard shell. If you use only POSIX syntax, it will.
# 10  
Old 05-03-2010
i'm using /usr/bin/sh that would be fine to use in lunux and hpux?
# 11  
Old 05-03-2010
Quote:
Originally Posted by C|KiLLeR|S
i'm using /usr/bin/sh that would be fine to use in lunux and hpux?

Linux doesn't usually have /usr/bin/sh, but you can link /bin/sh to it:
Code:
ln /bin/sh /usr/bin/sh  ## as root

I have no idea what shell /usr/bin/sh is on HPUX. If it works, use it.
# 12  
Old 05-03-2010
Quote:
Originally Posted by cfajohnson
If you use bash extensions, then your script will not be compatible with the standard shell. If you use only POSIX syntax, it will.
...except on solaris, whose default shell hasn't changed in ages beyond measure.
# 13  
Old 05-03-2010
Sorry, but Bash is not a fully POSIX-compliant shell. To quote from the Bash reference manual
Quote:
Starting Bash with the --posix command-line option or executing ‘set -o posix’ while Bash is running will cause Bash to conform more closely to the posix standard by changing the behavior to match that specified by posix in areas where the Bash default differs.
Not the wessel words "to conform more closely"!

See Bash POSIX Mode - Bash Reference Manual

Currently POSIX-compliance of a shell is defined by the VSC-PCTS2003 test suite. I do not believe that Bash will pass that testsuite.
# 14  
Old 05-03-2010
Quote:
Originally Posted by Corona688
...except on solaris, whose default shell hasn't changed in ages beyond measure.

On Solaris, /bin/sh is not a standard Unix shell.

I think the standard shell is /usr/xpg4/bin/sh.


---------- Post updated at 02:48 PM ---------- Previous update was at 02:34 PM ----------
Quote:
Originally Posted by fpmurphy
Sorry, but Bash is not a fully POSIX-compliant shell. To quote from the Bash reference manual

Not the wessel words "to conform more closely"!

http://tiswww.case.edu/php/chet/bash/bashtop.html:
"Bash is the GNU Project's Bourne Again SHell, a complete implementation of the IEEE POSIX and Open Group shell specification"
Quote:

See Bash POSIX Mode - Bash Reference Manual

Currently POSIX-compliance of a shell is defined by the VSC-PCTS2003 test suite. I do not believe that Bash will pass that testsuite.

Can you substantiate that?
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