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Full Discussion: [bash] getopts not executing when called second time.
Top Forums Shell Programming and Scripting [bash] getopts not executing when called second time. Post 302396439 by ASGR on Thursday 18th of February 2010 12:10:03 PM
Old 02-18-2010
[bash] getopts not executing when called second time.
Hi,

Unexpectedly, the function below doesn't seem to work
when called a second time. The output shows that when
the function is called the first time, it works as expected
but when it is called a second time, the loop that processes
the options passed to the function, with the while loop,
are completely bypassed.

Thanks in advance.

Code:
#!/bin/bash
function fn_check
{
	echo; echo "in check"
	while getopts ":defhrwx" opt; do
	echo "in loop"
	case $opt in
	d)	echo "in d $2";;
	e)	echo "in e";;
	f)	echo "in f";;
	h)	echo "in h";;
	r)	echo "in r";;
	w)	echo "in w";;
	x)	echo "in x";;
	\?)	echo "in ?";;
	esac
	done
}
fn_check -edrw helloworld
fn_check -erwx helloworld

OUTPUT.
Code:
in check
in loop
in e
in loop
in d helloworld
in loop
in r
in loop
in w

in check

 

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LEARN ABOUT SUNOS

echo

echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME

       echo - echo arguments to standard output

SYNOPSIS

       /usr/ucb/echo [-n] [argument]

DESCRIPTION

       echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output.

       echo  is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi-
       ronment variables.

       For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows:

	 o  echo your current-working-directory's full pathname

	 o  pipe the output through tr to translate the path's embedded slash-characters into space-characters

	 o  pipe that output through wc -w for a count of the names in your path.

	      example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w"

       See tr(1) and wc(1) for their functionality.

       The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be  invoked	if
       the  user  calls  echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape
       characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the  black-slashed  escape  characters,	and  ksh's
       echo() also understands a as the audible bell character; however, these commands do not have an -n option.

OPTIONS

       -n	Do not add the NEWLINE to the output.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), echo(1), ksh(1), sh(1), tr(1),  wc(1), attributes(5)

NOTES

       The -n option is a transition aid for BSD applications, and may not be supported in future  releases.

SunOS 5.10							    3 Aug 1994								  echo(1B)
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