I am passing multiple files in awk & since one of the file is empty(say file3) so the same gets skipped & logic goes for toss. Need suggestion/help in checking and putting additional checks for the same
Code:
awk -F, 'FNR==1 {++filecounter}
filecounter==1 {KRL[$1]=$2;next}
filecounter==2 {GUJ[$1]=$2;next}
filecounter==3 {DEL[$1]=$2;next}
filecounter==4 {UPW[$1]=$2;next}
{
if($1 in KRL)
print "FOUND IN KRL"
else if($1 in GUJ)
print "FOUND IN GUJ"
else if($1 in DEL)
print "FOUND IN DEL"
else if($1 in UPW)
print "FOUND IN UPW"
else
print "Not Found"
}
' File1 file2 file3 file4 mainfile
Hi Masters.....
I have problem !!!
I need to check number of records in a file and if it is zero or file is empty i need to do some task.
if ; then
echo "File s empty"
else
echo "Not empty"
fi
so how to check this condition.
I used wc -l < filename.txt => 1 for zero records
same result... (1 Reply)
How do I check if a file is empty in a sh script
I want to test in my shell script if the output file is empty and if it is do one thing and if it isnt empty do another?
any ideas? (8 Replies)
Hello,
I want to make a script which says if a text file is empty or not.
I tried two ways of making it, but I have problems with both of them.
Now I think that the better way is the ls -s solution (considering that an empty text file has a 0 weight, because "cat file.txt" fails when file is... (4 Replies)
I would like to empty multiple files contents (without delete the file) which have similar name to begin with.
e.g.
log1.txt
log2.txt
log3.txt
log4.txt
I know cat /dev/null will do the job but that only apply to a single file. But when i tried cat /dev/null > {} \; that doesnt do... (7 Replies)
I have a log directory:
/logs/foo.log
/logs/bar.log
/logs/err.out
I'm trying to find a way to
> /logs/*.log
> /logs/*.out
to blank them out, but of course, that doesn't work.
Any suggestions? (4 Replies)
I want to check if any file with testing*.txt exists but my script fails if more than 1 file exists. It works fine for a single file
if
then
echo "TEST21"
fi
--------------
bash:
How do I fix this?
Thanks
Please use code tags next time for your code and data. (8 Replies)
Hi gurus ,
I have two files and i want to perform different action based on the condition if both or either is empty
If
then
Do something
elif
then
do something
elif
then
do something
else
do something
fi
I have tried the below bt its not... (4 Replies)
I am using below code to split files based on blank lines but it does not work.
awk 'BEGIN{i=0}{RS="";}{x="F"++i;}{print > x;}'
Your help would be highly appreciated
find attachment of sample.txt file (2 Replies)
Hello, sorry to bother anyone reading this
I have an assignment with a question that reads:
Your current directory is stenton. Create empty files called f1, f2, and f12 (in that order), within stenton
So my first thought was to enter: touch f1 f2 f12
but that does not work, does anyone... (1 Reply)
I have a script, which is supposed to run 1 day of the month, connect to remote server certain directory, find files, tar the, and copy
find . -ctime -1 | tar -cvf transfer_dmz_start_monthly.tar *${Today}*.*;
if
then
echo "Cannot create a tar file, the terminated... (2 Replies)
Discussion started by: digioleg54
2 Replies
LEARN ABOUT NETBSD
cat
CAT(1) BSD General Commands Manual CAT(1)NAME
cat -- concatenate and print files
SYNOPSIS
cat [-beflnstuv] [-] [file ...]
DESCRIPTION
The cat utility reads files sequentially, writing them to the standard output. The file operands are processed in command line order. A
single dash represents the standard input, and may appear multiple times in the file list.
The word ``concatenate'' is just a verbose synonym for ``catenate''.
The options are as follows:
-b Implies the -n option but doesn't number blank lines.
-e Implies the -v option, and displays a dollar sign ('$') at the end of each line as well.
-f Only attempt to display regular files.
-l Set an exclusive advisory lock on the standard output file descriptor. This lock is set using fcntl(2) with the F_SETLKW command.
If the output file is already locked, cat will block until the lock is acquired.
-n Number the output lines, starting at 1.
-s Squeeze multiple adjacent empty lines, causing the output to be single spaced.
-t Implies the -v option, and displays tab characters as '^I' as well.
-u The -u option guarantees that the output is unbuffered.
-v Displays non-printing characters so they are visible. Control characters print as '^X' for control-X; the delete character (octal
0177) prints as '^?'. Non-ascii characters (with the high bit set) are printed as 'M-' (for meta) followed by the character for the
low 7 bits.
EXIT STATUS
The cat utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The command:
cat file1
will print the contents of file1 to the standard output.
The command:
cat file1 file2 > file3
will sequentially print the contents of file1 and file2 to the file file3, truncating file3 if it already exists. See the manual page for
your shell (i.e., sh(1)) for more information on redirection.
The command:
cat file1 - file2 - file3
will print the contents of file1, print data it receives from the standard input until it receives an EOF ('^D') character, print the con-
tents of file2, read and output contents of the standard input again, then finally output the contents of file3. Note that if the standard
input referred to a file, the second dash on the command-line would have no effect, since the entire contents of the file would have already
been read and printed by cat when it encountered the first '-' operand.
SEE ALSO head(1), hexdump(1), lpr(1), more(1), pr(1), tail(1), view(1), vis(1), fcntl(2)
Rob Pike, "UNIX Style, or cat -v Considered Harmful", USENIX Summer Conference Proceedings, 1983.
STANDARDS
The cat utility is expected to conform to the IEEE Std 1003.2-1992 (``POSIX.2'') specification.
The flags [-belnstv] are extensions to the specification.
HISTORY
A cat utility appeared in Version 1 AT&T UNIX. Dennis Ritchie designed and wrote the first man page. It appears to have been cat(1).
BUGS
Because of the shell language mechanism used to perform output redirection, the command ``cat file1 file2 > file1'' will cause the original
data in file1 to be destroyed! This is performed by the shell before cat is run.
BSD September 23, 2006 BSD