What is the 'awk' for? That doesn't look like awk code. (awk is its own programming language.)
You do not need to check if grep's output is blank to see if it found anything. It returns a success or failure code like any other utility. You can plug it into if directly, and invert with ! if needed.
'break' only makes sense in a loop. If you want to exit, 'exit' is what you want, 'exit 1' to exit with error particularly.
Your code looks for /temp, but your warning demands /tmp. Assuming /tmp is what you really want.
You need a return, or ; , between your if statement and the then.
I'm creating an oracle insert statement using awk but need to be able to escape the ' (forward single quote) as the oralce insert syntax requires these quotes. I've tried \ in and out of quotes etc.
It's these single quotes values (' .....')
cat $1 | awk -F"|" '{print "insert into table... (2 Replies)
her i am trying to edit a database file which is actually a small file holding my friend's name and birthdays
My Database
DEEPAK 27/08
DEEPIKA 18/02
DHYAN 23/03
DIPANKAR 24/10
SNIGDHO 19/05
AYANNAR 17/12
BHAI 22/09
DEBAN 16/08
JAGADISH 02/06
SUBHOJIT 23/02
TOJO 17/09
SUDHIR 12/09... (1 Reply)
Hey, I'm running knoppix and I'm trying to run a shell script to change multiple lines of text in multiple files
#!/bin/sh
for i in 'ls-1 test'
do
sed 's/bob/manny/'g $i > $i.0
mv $i.0 $i
done
Obviously this isn't the original file, but it's on another non-networked machine.
What... (7 Replies)
Hi guys, I am a newbie to shell scripting.Please help me to accomplish this task. Its very urgent,I should create a script which will do the following:
i) "cd ~joseph/ ; mkdir -p Bing/Bong ;mkdir -p Bing/Bang" and then create 15 ".txt" files with content "Bing Bang Bong" in "Bong"... (1 Reply)
Hi,
#!/bin/ksh
$v=""
for ((i = 1 ; i <= 5 ; i++ ))
do
v="THerrFile_$i.err";
grep -i "$i:Error" $v >>oraerror_output.txt
done
My requirement is to dynamically create variable like
THerrFile_1.err,THerrFile_2.err etc.
where my grep needs... (5 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
Hello all,,, I am trying to finish my assignment for my CNET class. I am running into 2 problems... First the "Delete a file" (Option 1) When I run this option everything... (5 Replies)
I am trying to create a shell script similar to ls, but which only lists directories. I have the first half working (no argument version), but trying to make it accept an argument, I am failing. My logic is sound I think, but I'm missing something on the syntax, I'm guessing in the bolded line? ... (9 Replies)
Hi,
I wants to print the 9th column information with its path name in some txt file. Here is one line which works fine for me:
rfdir /castor/cern.ch/user/s/sudha/forPooja | grep data | awk '{print "rfio:///castor/cern.ch/user/s/sudha/forPooja/"$9}' > dataFilenames.list
rfdir=="ls -ltr" ... (2 Replies)
Hello all,
I am facing a weird issue while executing a code below -
#!/bin/bash
cd /wload/baot/home/baotasa0/sandboxes_finance/ext_ukba_bde/pset
sh UKBA_publish.sh UKBA 28082015 3
if
then
echo "Param file conversion for all the areas are completed, please check in your home directory"... (2 Replies)
Hello. I hava homework for university but i cant do it and i need a little help if someone can help me :) I have to do a linux shell script.
Write a script that does the following:
1. Check if there is a directory in / home with myDir name.
If not, it creates it.
2. In the directory it... (1 Reply)
Discussion started by: alex4o0o
1 Replies
LEARN ABOUT OSX
mktemp
MKTEMP(1) BSD General Commands Manual MKTEMP(1)NAME
mktemp -- make temporary file name (unique)
SYNOPSIS
mktemp [-d] [-q] [-t prefix] [-u] template ...
mktemp [-d] [-q] [-u] -t prefix
DESCRIPTION
The mktemp utility takes each of the given file name templates and overwrites a portion of it to create a file name. This file name is
unique and suitable for use by the application. The template may be any file name with some number of 'Xs' appended to it, for example
/tmp/temp.XXXX. The trailing 'Xs' are replaced with the current process number and/or a unique letter combination. The number of unique
file names mktemp can return depends on the number of 'Xs' provided; six 'Xs' will result in mktemp selecting 1 of 56800235584 (62 ** 6) pos-
sible file names.
If mktemp can successfully generate a unique file name, the file is created with mode 0600 (unless the -u flag is given) and the filename is
printed to standard output.
If the -t prefix option is given, mktemp will generate a template string based on the prefix and the TMPDIR environment variable if set. The
default location if TMPDIR is not set is /tmp. Care should be taken to ensure that it is appropriate to use an environment variable poten-
tially supplied by the user.
Any number of temporary files may be created in a single invocation, including one based on the internal template resulting from the -t flag.
The mktemp utility is provided to allow shell scripts to safely use temporary files. Traditionally, many shell scripts take the name of the
program with the pid as a suffix and use that as a temporary file name. This kind of naming scheme is predictable and the race condition it
creates is easy for an attacker to win. A safer, though still inferior, approach is to make a temporary directory using the same naming
scheme. While this does allow one to guarantee that a temporary file will not be subverted, it still allows a simple denial of service
attack. For these reasons it is suggested that mktemp be used instead.
OPTIONS
The available options are as follows:
-d Make a directory instead of a file.
-q Fail silently if an error occurs. This is useful if a script does not want error output to go to standard error.
-t prefix
Generate a template (using the supplied prefix and TMPDIR if set) to create a filename template.
-u Operate in ``unsafe'' mode. The temp file will be unlinked before mktemp exits. This is slightly better than mktemp(3) but still
introduces a race condition. Use of this option is not encouraged.
EXIT STATUS
The mktemp utility exits 0 on success, and 1 if an error occurs.
EXAMPLES
The following sh(1) fragment illustrates a simple use of mktemp where the script should quit if it cannot get a safe temporary file.
tempfoo=`basename $0`
TMPFILE=`mktemp /tmp/${tempfoo}.XXXXXX` || exit 1
echo "program output" >> $TMPFILE
To allow the use of $TMPDIR:
tempfoo=`basename $0`
TMPFILE=`mktemp -t ${tempfoo}` || exit 1
echo "program output" >> $TMPFILE
In this case, we want the script to catch the error itself.
tempfoo=`basename $0`
TMPFILE=`mktemp -q /tmp/${tempfoo}.XXXXXX`
if [ $? -ne 0 ]; then
echo "$0: Can't create temp file, exiting..."
exit 1
fi
SEE ALSO mkdtemp(3), mkstemp(3), mktemp(3), environ(7)HISTORY
A mktemp utility appeared in OpenBSD 2.1. This implementation was written independently based on the OpenBSD man page, and first appeared in
FreeBSD 2.2.7. This man page is taken from OpenBSD.
BSD December 30, 2005 BSD