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Full Discussion: Problem in sending inputs to format command using expect
Top Forums Shell Programming and Scripting Problem in sending inputs to format command using expect Post 302786411 by DGPickett on Wednesday 27th of March 2013 11:41:29 AM
Old 03-27-2013
What good is a partition of size zero?

Expect runs in tcl, as I recall, so there may be looping constructs in tcl you can include. The man page does not show and flow of control commands: Man Page for expect (all Section 0) - The UNIX and Linux Forums You could generate the expect script using a shell loop. You can generate it on the fly as a named pipe or with commands from stdin in interactive mode:

The -f flag prefaces a file from which to read commands from. The flag
itself is optional as it is only useful when using the #! notation (see
above), so that other arguments may be supplied on the command line.
(When using Expectk, this option is specified as -file.)

By default, the command file is read into memory and executed in its
entirety. It is occasionally desirable to read files one line at a
time. For example, stdin is read this way. In order to force arbi-
trary files to be handled this way, use the -b flag. (When using
Expectk, this option is specified as -buffer.)Notethatstdio-buffering-
maystilltakeplacehoweverthisshouldn'tcauseproblemswhenreadingfromafi-
foorstdin.

If the string "-" is supplied as a filename, standard input is read
instead. (Use "./-" to read from a file actually named "-".)

The -i flag causes Expect to interactively prompt for commands instead
of reading them from a file. Prompting is terminated via the exit com-
mand or upon EOF. See interpreter (below) for more information. -i is
assumed if neither a command file nor -c is used. (When using Expectk,
this option is specified as -interactive.)

-- may be used to delimit the end of the options. This is useful if
you want to pass an option-like argument to your script without it
being interpreted by Expect. This can usefully be placed in the #!
line to prevent any flag-like interpretation by Expect. For example,
the following will leave the original arguments (including the script
name) in the variable argv.

#!/usr/local/bin/expect --

 Note that the usual getopt(3) and execve(2) conventions must be
observed when adding arguments to the #! line.
 

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LEARN ABOUT OSF1

getopt

getopt(1)						      General Commands Manual							 getopt(1)

NAME

       getopt - Parses command line flags and arguments

SYNOPSIS

       getopt format tokens

DESCRIPTION

       The  getopt command is used to parse a list of tokens using a format that specifies expected flags and arguments.  A flag is a single ASCII
       letter and, when followed by a : (colon), is expected to take a modifying argument that may or may not be separated from it by one or  more
       tabs or spaces.	(You can include multi-byte characters in arguments, but not as flag letters.)

       The getopt command completes processing when it has read all tokens or when it encounters the special token -- (double dash).  It then out-
       puts the processed flags, a --, and any remaining tokens.

       If a token fails to match a flag, getopt writes a message to standard error.

NOTES

       In the csh, use the following command to run getopt:

       set argv=`getopt flag_string $*`

EXAMPLES

       The following is an example of the use of getopt in a skeleton shell script to parse options:

       #!/bin/sh # parse command line into arguments set -- `getopt a:bc $*` # check result of parsing if [ $? != 0 ] then
	       exit 1 fi while [ $1 != -- ] do
	       case $1 in
	       -a)     # set up the -a flag
		       AFLG=1
		       AARG=$2
		       shift;;
	       -b)     # set up the -b flag
		       BFLG=1;;
	       -c)     # set up the -c flag
		       CFLG=1;;
	       esac
	       shift  # next flag done shift	 # skip double dash # now do the work .  .  .

       The following are all equivalent arguments to the script:

       -a ARG -b -c -- A B C -a ARG -bc -- A B C -aARG -b -c -- A B C -b -c -a ARG -- A B C

SEE ALSO

       Commands:  sh(1)

       Functions:  getopt(3)

																	 getopt(1)
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