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Full Discussion: Identify problem with while getopts
Top Forums Shell Programming and Scripting Identify problem with while getopts Post 302978469 by SkySmart on Sunday 31st of July 2016 12:48:18 AM
Old 07-31-2016
Quote:
Originally Posted by Don Cragun
It is not! According to the standards, options must be specified on the command line BEFORE operands.

Furthermore, I have no idea why you have so many colons in the first argument passed to getopts??? Are you trying to say that you will allow up to six -: :_option_argument options??? You don't have a : choice in your case statement and you don't need to specify an option more than once in that operand even if more than one of those options are allowed.

I would try to write code that might work for you, but I have no idea what you are trying to do. The Usage statement printed by your code when things go wrong indicate that absolutely no options are allowed.

The getopts man page on your system or the man page for your shell on your system may supply an option (or an environment variable setting) that will allow you to violate POSIX rules and allow you to process command-line arguments with options after operands by reordering your command line. My system doesn't allow that without lots of extra abnormal argument processing and I won't help you do that because I believe that any new application written to put options after operands is fundamentally broken. (The only exceptions to this are utilities like compilers and linkers that need to apply certain options to certain groups of operands and different options to different groups of operands. That does not seem to be the case for what you are trying to do.)

And, what is the use of having "options" -i optional_string1include:optional_string2 and -e optional_string3exclude:optional_string4 if you script is going to fail if both of those options are not specified on the command line? If an option has to be specified, by definition, it is not an option! Did you just forget to supply default values for these options, or are they just additional required operands and you are trying to say that the order of those operands in relation to other required operands is unspecified??? (If this is what you're saying, I personally believe this is a horrendous human factors decision.)
i apologize for not being clear.

currently, there are 4 ways to run my script.

one is without any of the -i or -e options being passed to it
second is if just the -i is passed to it
third is if just the -e is pass to it
fourth is if both -i and -e are passed to the script

all im trying to do is account for those 4 scenarios using getopts.
 

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LEARN ABOUT OPENSOLARIS

volcopy

volcopy(1M)						  System Administration Commands					       volcopy(1M)

NAME

       volcopy - make an image copy of file system

SYNOPSIS

       volcopy [-F FSType] [-V] [generic_options]
	    [-o FSType-specific_options] operands

DESCRIPTION

       volcopy makes a literal copy of the file system. This command may not be supported for all FSTypes.

OPTIONS

       The following options are supported:

       -F FSType		     Specify  the  FSType  on which to operate. The FSType should either be specified here or be determinable from
				     /etc/vfstab by matching the operands with an entry in the table. Otherwise,  the  default	file  system  type
				     specified in /etc/default/fs will be used.

       -V			     Echo  the	complete  command line, but do not execute the command. The command line is generated by using the
				     options and arguments provided by the user and adding to them  information  derived  from	/etc/vfstab.  This
				     option should be used to verify and validate the command line.

       generic_options		     Options  that  are  commonly  supported  by  most FSType-specific command modules.  The following options are
				     available:

				     -a    Require the operator to respond "yes" or "no" instead of simply waiting ten seconds before the copy	is
					   made.

				     -s    (Default) Invoke the DEL if wrong verification sequence.

       -o FSType-specific_options    Specify  FSType-specific  options	in  a  comma  separated  (without  spaces) list of suboptions and keyword-
				     attribute pairs for interpretation by the FSType-specific module of the command.

OPERANDS

       The following operands are supported:

       operands    generally include the device and volume names and are file system specific. A detailed description of the operands can be found
		   on the FSType-specific man pages of volcopy.

EXIT STATUS

       The following exit values are returned:

       0    Successful file system copy

       1    An error has occurred.

FILES

       /etc/vfstab	  list of default parameters for each file system

       /etc/default/fs	  default  local  file	system	type.  Default	values can be set for the following flags in /etc/default/fs. For example:
			  LOCAL=ufs.

			  LOCAL:    The default partition for a command if no FSType is specified.

ATTRIBUTES

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

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

SEE ALSO

       labelit(1M), vfstab(4), attributes(5) Manual pages for the FSType-specific modules of volcopy.

SunOS 5.11							    20 Mar 1995 						       volcopy(1M)
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