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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 DEBIAN

guards

GUARDS(1)						User Contributed Perl Documentation						 GUARDS(1)

NAME

       guards - select from a list of files guarded by conditions

SYNOPSIS

       guards [--prefix=dir] [--path=dir2:dir2:...] [--default=0|1]	   [-v|--invert-match] [--list|--check] [--config=file]        symbol ...

DESCRIPTION

       The script reads a configuration file that may contain so-called guards, file names, and comments, and writes those file names that satisfy
       all guards to standard output. The script takes a list of symbols as its arguments. Each line in the configuration file is processed
       separately. Lines may start with a number of guards. The following guards are defined:

	   +xxx Include the file(s) on this line if the symbol xxx is defined.

	   -xxx Exclude the file(s) on this line if the symbol xxx is defined.

	   +!xxx Include the file(s) on this line if the symbol xxx is not defined.

	   -!xxx Exclude the file(s) on this line if the symbol xxx is not defined.

	   - Exclude this file. Used to avoid spurious --check messages.

       The guards are processed left to right. The last guard that matches determines if the file is included. If no guard is specified, the
       --default setting determines if the file is included.

       If no configuration file is specified, the script reads from standard input.

       The --check option is used to compare the specification file against the file system. If files are referenced in the specification that do
       not exist, or if files are not enlisted in the specification file warnings are printed. The --path option can be used to specify which
       directory or directories to scan.  Multiple directories are separated by a colon (":") character. The --prefix option specifies the
       location of the files.

AUTHOR

       Andreas Gruenbacher <agruen@suse.de> (SuSE Linux AG)

perl v5.14.2							    2012-03-04								 GUARDS(1)
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