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Full Discussion: Check that at least one file exists in the directory.
Top Forums UNIX for Beginners Questions & Answers Check that at least one file exists in the directory. Post 303039567 by Rajesh123 on Wednesday 9th of October 2019 02:39:24 PM
Old 10-09-2019
Check the at least one file exists in the directory
Below code is doing file validation properly but returning error after completion second loop. error "file does not existing". my requirement is to check only once if the file exists then it should delete data from table and enter in to the second do loop and print the file names then exit without any error. if there is no single file exists in the directory then should give error.
abc_234.dat abc _123.dat

Code:
INPUTDIR=/path/with/files
for i in $INPUTDIR/abc*.dat
do
        if  [ -f $i ]; then
                echo "delete data from table..."
do
ls -t abc*.dat | sort > ABC.lst
cat  ABC.lst | while read line
do
export file1=$line
echo "${file1}"
done
        else
                echo "File does not exist, exiting.."
                exitcd=44
        fi
done
return $exitcd

Last edited by Peasant; 10-09-2019 at 11:31 PM.. Reason: Code tags, use them.
 

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LEARN ABOUT DEBIAN

plotit

plotit(1)						      General Commands Manual							 plotit(1)

NAME

       plotit - experiment data visualization

SYNOPSIS

       plotit -w FILE
       plotit [-lp] -q FILE [FILE]...
       plotit [-lp] Y FILE [FILE...]
       plotit [-lp] X Y FILE [FILE...]

DESCRIPTION

       The  plotit program is a simple plotting program which can draw line plots and stripcharts using a command language similar to that of gnu-
       plot.  It can also make quick plots of multiple data files from the command-line.  Wildcards may be used in the file names.

       The program takes optional expressions which can be used to manipulate data columns before plotting.  Expressions may be as simple  as  the
       designation  of	a  column  to  be  plotted or may contain arithmetic expressions and functions.  In the latter case the espression must be
       enclosed in 'single' or "double" quotation marks. Column numbers are designated by the at-sign character (@).  A single expression is  used
       for the Y axis of the plot.

OPTIONS

       -h, --help
	      Print the usage and exit.

       --version
	      Print the version number and exit.

       -w     Watch  the input file for commands to stripchart, or wait to read all of stdin before plotting.  Only one file or - for stdin may be
	      specified with this option.  No other options may be used in conjuction with this option.

       -q     Plot the first and second columns of each file.

       -l     Plot with lines.

       -p     Plot with points.

EXAMPLES

       Plot the second column versus the first of all three files with lines only.

	      plotit -lq file1.dat file2.dat file3.dat

       Plot the quotient of the third column and the second column versus the first column of all files matching the pattern using points only.

	      plotit -p '@3/@2' file??.dat

       Plot the natural log of the second column divided by the third column versus the fourth column.	By default these  data	are  plotted  with
       both lines and points.

	      plotit @4 'log(@2/@3)' file.dat

AUTHOR

       This manual page was written by Carlo Segre <segre@iit.edu>.

								 February 21, 2009							 plotit(1)
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