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Shell Programming and Scripting

Shellscripting -z option

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Top Forums Shell Programming and Scripting Shellscripting -z option
# 1  
Old 08-17-2019
Perhaps you think that your script checks your current shell. That is not the case.
The script is run by a new shell and reports on that shell.
If you run the script with its scriptname then it reports on the shell given in the #! shebang.
If you run the script with bash scriptname it finds bash.
If you run the script with ksh scriptname it finds ksh.
To report on the current (calling) shell the only solution is to include/source it:
Code:
. scriptname

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LEARN ABOUT LINUX

suspend

suspend(1)                                                         User Commands                                                        suspend(1)

NAME

       suspend - shell built-in function to halt the current shell

SYNOPSIS

   sh
       suspend

   csh
       suspend

   ksh
       suspend

DESCRIPTION

   sh
       Stops the execution of the current shell (but not if it is the login shell).

   csh
       Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su.

   ksh
       Stops the execution of the current shell (but not if it is the login shell).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                         suspend(1)