mktemp will create a temporary file, you need add -d option to create a temp directory.
mktemp -d is only available in the GNU version. Getting a name from mktemp and then manually creating that directory works across all POSIX compliant systems.
Hi
I believe there is a method to remove all temporary files when a KSH script terminates (either expectedly or unexpectedly).
I think is some sort of subroutine you can create that runs when the script exits. Can anyone help me with this please?
Many thanks
Helen :confused: (2 Replies)
Hi all, new to the threads as well as Unix/Linux. I need to create a script that will delete any temporary files as well as check the files on the system for errors or corruption. This is what I have so far and I'm sure that I'm missing things or have the wrong commands. I'm not sure where to go... (3 Replies)
Hello,
One of the senior network admins at work told me that I should not hard code temp files into my scripts. Rather I should use the mktemp commands in the script to create them on the fly.
His argument was that if a malicious user knew the name of my temp files in the script they could... (6 Replies)
Hi everyone,
Looking for a suggestion to improve the below script in which I´ve been working.
The thing is I have 3 separated AWK scripts that I need to apply over the inputfile, and for scripts (2) and (3) I have to use a "temp" file as their inputfile (inputfile_temp and inputfile_temp1... (2 Replies)
Hello Friends
I am currently facing high CPU usage problem which is making my site extremely slow.
Currently I am using a 8GB RAM with 8 cores but, the creation of temporary files is eating away a lot of the CPU resource making the site very slow.
The normal CPU load average remains below 2-3... (5 Replies)
HI,
I am from testing background. I have a scenario of a file generation, through cronjob, on a defined path.
After I fill the data as 100 % utilized, my application is generating an empty file on the defined path.
# df -kh
Filesystem Size Used Avail Use% Mounted on... (3 Replies)
I'm looking for help with finding where plugin data and other page resources are stored on the hard disk in safari 6.0. With the new update, the activity window has been merged into the develop menu under "show page resources" and one cannot access them directly.
I tried running opensnoop to see... (3 Replies)
Hi,
I've a script which creates a temp flat file for storing all business dates received on a single day from diff control files sent by source system on that day.
e.g on 12th april I receive txns for business day 8,9,10,11 april.
I capture this business day and append to a flat file from... (1 Reply)
Heyas
As some applications (sed,grep,vi, etc) create some tempfiles, i'd changed a script to this: (sadly i cant find the original post (code) anymore (which just removed 2 'diffrent kinds'), just similar ones - forgot that as i was new to all this)
:) ~ $ cat $(which rmtf)
#!/bin/sh
#... (1 Reply)
Hi All,
I am having a situation now to delete a huge number of temp files created during run times approx. 16700+ files. We have never imagined that we will get this this much big list of files during run time. It worked fine for lesser no of files in the list. But when list is huge we are... (7 Replies)
Discussion started by: mad man
7 Replies
LEARN ABOUT OPENDARWIN
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 testing roughly 26 ** 6 combinations.
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 an 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
potentially 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.
Mktemp 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.
DIAGNOSTICS
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 November 20, 1996 BSD