Consider this: Your program uses a temporary file with a predictable name, to be used as a log. To this log, you write any input that isn't acceptable. A black-hat hacker now creates a symlink to /etc/passwd, and inputs this to your program:
If everything goes well he has now access to a user called "toor" with an empty password and full administration rights. Not good, wouldn't you say?
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)
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 there,
As a regular unix user I am forever programming on the command line or writing scripts so that I first write a load of data to a file to read from. In the end I am always left with a bundle of .txt, .tmp which is what I usually call them. As a basic programmmer I was wondering is... (6 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 PHP
tmpfile
TMPFILE(3) 1 TMPFILE(3)tmpfile - Creates a temporary fileSYNOPSIS
resource tmpfile (void )
DESCRIPTION
Creates a temporary file with a unique name in read-write (w+) mode and returns a file handle .
The file is automatically removed when closed (for example, by calling fclose(3), or when there are no remaining references to the file
handle returned by tmpfile(3)), or when the script ends.
For details, consult your system documentation on the tmpfile(3) function, as well as the stdio.h header file.
RETURN VALUES
Returns a file handle, similar to the one returned by fopen(3), for the new file or FALSE on failure.
EXAMPLES
Example #1
tmpfile(3) example
<?php
$temp = tmpfile();
fwrite($temp, "writing to tempfile");
fseek($temp, 0);
echo fread($temp, 1024);
fclose($temp); // this removes the file
?>
The above example will output:
writing to tempfile
SEE ALSO tempnam(3), sys_get_temp_dir(3).
PHP Documentation Group TMPFILE(3)