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Full Discussion: Variable value inconsistency on BASH and CSH
Top Forums Shell Programming and Scripting Variable value inconsistency on BASH and CSH Post 302305144 by pavanlimo on Wednesday 8th of April 2009 04:58:11 AM
Old 04-08-2009
CPU & Memory Variable value inconsistency on BASH and CSH
May God never give you the bane of working on Solaris.
Now, I am trying to run this simple shell script:

Code:
 #!/bin/sh
    
    input="a
    b
    c"
    data="123"
        
    while read eachline
    do      
       data="$data$eachline"
    done <<  EOF
    $(echo "$input")
    EOF
    
    echo "$data"
    exit 0

On RHEL(BASH) I receive output as expected i.e "123abc", however, on Solaris I receive just "123".

After fair bit of googling, I realized that Solaris is forking a process for code inside the while loop and hence the variable's($data) value is not reflected on the outside of while loop.

Any hope to make this code compatible on both platforms would be greatly appreciated.
 

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LEARN ABOUT OPENSOLARIS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
       /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)
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