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Full Discussion: Help with control flow in a Bash script
Top Forums Shell Programming and Scripting Help with control flow in a Bash script Post 302771080 by Jrodicon on Tuesday 19th of February 2013 03:09:43 PM
Old 02-19-2013
Help with control flow in a Bash script
In my bash script I want to say "if argument 2 is anything except x, y or z, than echo this" (x y and z being words).

So my script looks like this:

Code:
if [[ $2 != {x,y,z} ]]
then
echo "unrecognized input: $2"
fi

This usually works but than I also want to say "if argument 2 IS x, y, or z, but argument 4 is not one of them, echo 'unrecognized input: $4'". So how to I format this so my script does both. I had this, but whenever argument 2 was x, y or z, and argument 4 wasn't, I still got the "unrecognized input: $2" error message.

Code:
if [[ $2 != {x,y,z} ]]
then
echo "unrecognized input: $2"
elif [[ $2 = {x,y,z} && $4 != {x,y,z} ]]
then
echo "unrecognized input: $4"
fi

Last edited by Jrodicon; 02-19-2013 at 04:24 PM..
 

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LEARN ABOUT SUNOS

echo

echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME

       echo, noecho - enable/disable terminal echo

SYNOPSIS

       cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib 
       -R /usr/xpg4/lib -lcurses [ library... ]

       c89 [ flag... ] file... -lcurses [ library... ]

       #include <curses.h>

       int echo(void);

       int noecho(void);

DESCRIPTION

       The  echo()  function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially,
       curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control  soft-
       ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined.

RETURN VALUES

       Upon successful completion, these functions return OK. Otherwise, they return ERR.

ERRORS

       No errors are defined.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5)

SunOS 5.10							    5 Jun 2002							    echo(3XCURSES)
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