Solaris and redhat difference in bash scripting

champak · 12-04-2007, 01:23 AM

Hi..
Anything wrong with the following line in my script?

Code:

logArray=$(find "$1" -type f|grep -v bak)

This works fine in Redhat linux. But in Solaris I get

Quote:

Job.sh: syntax error at line 96: `logArray=$' unexpected

Is there in any difference in redhat bash & solaris bash..

acid_kewpie · 12-04-2007, 02:06 AM

are you actaully using bash? solaris using csh by default afair.

ghostdog74 · 12-04-2007, 02:15 AM

Quote:

Originally Posted by champak

Hi..
Anything wrong with the following line in my script?

Code:

logArray=$(find "$1" -type f|grep -v bak)

This works fine in Redhat linux. But in Solaris I get

Is there in any difference in redhat bash & solaris bash..

Thanks,
Ananth

in solaris, the default should be the bourne shell if i am not wrong. you can use

Code:

#!/usr/bin/bash
logarray=$(find ...)

in bourne shell, you can use backticks

Code:

logarray=`find...`

bigearsbilly · 12-04-2007, 02:53 AM

in solaris, a default shell script runs with /bin/sh
on linux a /bin/sh shell is actually /bin/bash
and very annoyingly is not as compatible as it says it is.

So a linux /bin/sh is not actually a valid /bin/sh
script on another system (solaris at least).

in Solaris I would advise that you use /bin/ksh which will run most bash scripts.

IMHO korn is a much better scripting shell anyhow.

champak · 12-04-2007, 03:22 AM

Hi...
Thanks acid_kewpie and ghostdog74
In my target system the default is configured to be ksh.
But Im using Bash to execute the script.(#!/usr/bin/bash)

The script was fine in Redhat.
Should I be replacing $(cmds) to `(cmds)` to make it work in Solaris?

Why it doesn work in Solaris?

Thanks.

champak · 12-04-2007, 03:25 AM

Thanks bigearsbilly.
I dint see your reply before posting the previous quick reply

ghostdog74 · 12-04-2007, 04:02 AM

Quote:

Originally Posted by champak

Hi...
Thanks acid_kewpie and ghostdog74
In my target system the default is configured to be ksh.
But Im using Bash to execute the script.(#!/usr/bin/bash)

The script was fine in Redhat.
Should I be replacing $(cmds) to `(cmds)` to make it work in Solaris?

Why it doesn work in Solaris?

Thanks.

you can try (for the $() syntax ). Later version of Solaris comes with bash.

Code:

# bash myscript.sh

or if you have defined the shebang as #!/usr/bin/bash
then just

/path/myscript.sh

bigearsbilly · 12-04-2007, 04:09 AM

the $(command) works in /bin/ksh

I would just put

#!/bin/ksh

for each script and try it.

jlliagre · 12-04-2007, 04:39 AM

The $(command) works under Solaris with most shells including:

/usr/xpg4/bin/sh (POSIX compliant shell)
/bin/ksh (ksh88)
/usr/dt/bin/dtksh (old CDE ksh93 with X11 support)
/bin/ksh93 (the latest ksh)
/bin/bash
/bin/zsh

It doesn't works with /bin/sh which is not POSIX compliant but kept here for upward compatibility requirements (POSIX shell can break legacy /bin/sh scripts).

As bigearsbilly suggests, the preferred shell under Solaris is ksh (and ksh93 when available).

chrism01 · 12-04-2007, 04:39 PM

I also strongly advise deciding/finding out which shell you ought to use in prod eg ksh and using the same for dev.
In the same spirit, always use an explicit shell invocation eg
#!/bin/ksh
It's amazing how often the default shell in any given env is NOT the same as yours....