One important thing to keep in mind with CGI. It doesn't run as you, it runs as the web server's user. Which means a CGI script doesn't -- AND SHOULDN'T! -- have permissions to write to the current folder, whatever it happens to be. You should create a file in a known writable location, like /tmp/$$-query.txt or some such. $$ is the script's PID, which is a quick and dirty way of getting a unique file name. (Once you have stuff working, see mktemp for a fancier, safer option.) And yes, you'll need to delete the file when you're done!
What's 'echo cat' for? If you want to cat, run cat. But you don't actually need cat here, grep (and most other commands) is fully capable of reading files without cat's help.
Also, you should be putting variables inside double quotes, and not putting * inside double quotes.
Lastly, does your web server have read-access to /opt/SUNWappserver/nodeagents/ins1/logs/* ? It'll need it.
Hi,
I'm developing a system which requires me to run a ksh script from within a cgi script. What sort of syntax will I need to do this, I'm sure it's simple but can't find out how anywhere!
Thanks. (2 Replies)
Hey - I am new to cgi scripting... just writing a script to output df -k output to html page... but I cannot get the df lines on separate lines on the page, it all comes out on one line and is not very readable.. any suggestions?
My script is below - please keep in mind I am only new to it so... (1 Reply)
hii, i have a cgi script file which may take some hours to complete. The script logs the output and mails the user. so the browser need not be open for the output. But currently the script dies off the instant the browser is closed or other pages are viewed. Is there a way out .. ?
i have... (0 Replies)
Hi,
I'm learning some simple cgi scripting. I can make a script like this,
so my browser shows "Hello World"
/www/cgi-bin/name.sh
---
#!/bin/sh
MyName=World
echo "<html> Hello $MyName </html>"
---
What I'd like is to have a separate html and script files in the cgi folder so ... (1 Reply)
Hi
I know how to pass data from client side (html file) to server using CGI script (POST method).
I also know how to re-create the html page from server side after receiving the data (using printf).
However I want to write static pages on client side (only the structure), and only to pass... (0 Replies)
hi there
im currently in the process of creating a website for use basically within our org. im using a os x machine and installed MAMP - which includes Apache, mysql... the site will be used by techs to primarily install pkgs files onto os x devices. i would like to have buttons or hyperlinks... (2 Replies)
Hi team,
I have a typical problem with cgi pages in apache webserver in WINDOWS
I am able to execute(display) the pages that are saved in cgi-bin folder.
But I am not able to execute the pages stored in htdocs or other folder other than cgi-bin folder.
Could anyone please let me know how... (1 Reply)
Hi
I have written a script and I want it to be run from web with the help of CGI. can you please guide me .
below script is working fine if run from backend but not sure how I should run through web.
#!/bin/bash
string1=look
string2=0
string3=.sdn.dnb
echo -n "enter... (3 Replies)
Hi everyone,
I want to kill process through the web, so I create html page with single bottom that run kill command in shell script with CGI.
Here is html code:
<td><form METHOD="GET" action="http://IP:port/cgi_bin/script.cgi" > <input type="submit" value= "Submit" > <INPUT name="q"... (7 Replies)
Hello,
I have created my script which works properly through the terminal, but I want to convert it to perform all functions as it performs through terminal, but in this case perform through web browser.
My /bin/sh script is:... (1 Reply)
Discussion started by: juta2020
1 Replies
LEARN ABOUT LINUX
unbuffer
UNBUFFER(1) General Commands Manual UNBUFFER(1)NAME
unbuffer - unbuffer output
SYNOPSIS
unbuffer program [ args ]
INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose
you are watching the output from a fifo by running it through od and then more.
od -c /tmp/fifo | more
You will not see anything until a full page of output has been produced.
You can disable this automatic buffering as follows:
unbuffer od -c /tmp/fifo | more
Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the
-p flag. Example:
process1 | unbuffer -p process2 | process3
CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider:
process1 | unbuffer -p process2 | process3
If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may
not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or
process2.
In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific
solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro-
cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place-
holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder
for another process.
$ cat /tmp/abcdef.log | grep abc | cat
abcdef
xxxabc defxxx
$ cat /tmp/abcdef.log | unbuffer grep abc | cat
$ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat
abcdef
xxxabc defxxx
$
BUGS
The man page is longer than the program.
SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995.
AUTHOR
Don Libes, National Institute of Standards and Technology
1 June 1994 UNBUFFER(1)