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Full Discussion: Incorrect number of command line arguments and missing required files
Top Forums Shell Programming and Scripting Incorrect number of command line arguments and missing required files Post 302810655 by franzpizzo on Wednesday 22nd of May 2013 09:20:49 AM
Old 05-22-2013
The redirect to the standard is
Code:
echo "Error" 1>&2

so
Code:
#!/bin/bash
if [ $# -lt 1 ] ; then #Check there is enough command line parameters.
      echo "Not enough command line parameters" 1>&2
        exit 1
fi

if [ ! -e $1 ] ; then
		echo "$1 does not exist!" 1>&2
		exit 1
fi

while read i
do #Check whether there is missing file
        if [ ! -e $i ] ; then
                echo "$i does not exist!"
                exit 1
        fi
done < "$1"
echo "All files exist!" 
exit 0

This User Gave Thanks to franzpizzo For This Post:
Ray Sun
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

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

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

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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