linux 内置读取命令标志

Question

I am running into an odd situation. I am on RHEL 6.3. I am trying to use the built-in 'read' command to read the lines in the file in an array and to process it.

In my script, I am using

while IFS=" " read -r -a appInfo
do
    echo "4 ${appInfo[0]}"
    echo "4 ${appInfo[1]}"
    echo "4 ${appInfo[2]}"
    echo "4 line *{appInfo[@]}"
    currentApp="${appInfo[*]}"
.....
done < details.txt

It is working fine, when I execute the script from the command line. The read command shows the below info

read: usage: read [-ers] [-a array] [-d delim] [-i text] [-n nchars] [-N nchars] [-p prompt] [-t timeout] [-u fd] [name ...]

If I do read --version on command line, I get

Commandline version read (AT&T Research) 2006-12-19

But when I try to execute the exact same script from a Bamboo project, the read command generates an error

read: -a: unknown option
Usage: read [-ACprsv] [-d delim] [-u fd] [-t timeout] [-n nchar] [-N nchar]
            [var?prompt] [var ...]

Bamboo : version read (AT&T Research) 2006-12-19

So, if the version shows the same, why do the flags show differently?

What could be the problem. How can I solve the issue, so that I can read the line into an array even when running it from a Bamboo plan?

Answer 1

Thanks to @John1024, I was able to fix the problem by changing the #! line to #!/bin/bash from #!/bin/sh ( which was running the default ksh shell ).

The credit of solution goes to @John1024, just putting this as an answer so that it can be marked as a solution to question.