Sponsored Content
Top Forums UNIX for Dummies Questions & Answers "vi"-ing a constantly updated file Post 302115525 by Percy on Wednesday 25th of April 2007 09:47:13 AM
Old 04-25-2007
"vi"-ing a constantly updated file

Hi,

A bit of a dumb question here. Sorry folks.

Suppose I have this file which is being updated at irregular intervals (a few seconds, a few minutes, who knows) by a background process.

I 'vi' this file with the intention of editing it, so it opens up a temp copy as the usual /tmp/720cwhatever

Now suppose, whilst I have this file opened, its updated several times by the background process.

I make my changes, save-quit.

What happens to the updates that were made by the background process during the time I had the file opened?


How do I mitigate this?
(unfortunately, stopping the background process is not an option).


The file is fairly big also (about 40Mb) so it takes vi a few seconds to load it up, save to it etc.....


Unix is ksh.
OS is SunOS.

Hope you guys can help! - thanks in advance!
 

7 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Explain the line "mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`"

Hi Friends, Can any of you explain me about the below line of code? mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'` Im not able to understand, what exactly it is doing :confused: Any help would be useful for me. Lokesha (4 Replies)
Discussion started by: Lokesha
4 Replies

2. Shell Programming and Scripting

Ignore "a line" within /etc/profile only when su'ing

Is there a way to ignore a command within /etc/profile only when su'ing as any particular user. For instance.... As root, if I run "su - oracle -c program" it is running a string in my profile called "echo "^2;$(hostname)-(ABC) @ $(who am i)^G". I don't want the above string to run if I... (9 Replies)
Discussion started by: lwif
9 Replies

3. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

4. Shell Programming and Scripting

finding the strings beween 2 characters "/" & "/" in .txt file

Hi all. I have a .txt file that I need to sort it My file is like: 1- 88 chain0 MASTER (FF-TE) FFFF 1962510 /TCK T FD2TQHVTT1 /jtagc/jtag_instreg/updateinstr_reg_1 dff1 (TI,SO) 2- ... (10 Replies)
Discussion started by: Behrouzx77
10 Replies

5. UNIX for Dummies Questions & Answers

Using "mailx" command to read "to" and "cc" email addreses from input file

How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address and column 3 contains “cc” e-mail address to include with same email. Sample input file, email.txt Below is an sample code where... (2 Replies)
Discussion started by: asjaiswal
2 Replies

6. Shell Programming and Scripting

Permission error when "touch"ing file with different user

Hi, There are 2 users (T886072 & T864764) that need to be provided full (rwx) access to a directory. I made the changes to the directory permissions using chmod and setfacl : root@digidb2:# chmod 700 /u02/ftpfiles/MFRS16/discount_rates/ root@digidb2:# setfacl -s... (3 Replies)
Discussion started by: anaigini45
3 Replies

7. Shell Programming and Scripting

Bash script - Print an ascii file using specific font "Latin Modern Mono 12" "regular" "9"

Hello. System : opensuse leap 42.3 I have a bash script that build a text file. I would like the last command doing : print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt where : print_cmd ::= some printing... (1 Reply)
Discussion started by: jcdole
1 Replies
shell(1F)							   FMLI Commands							 shell(1F)

NAME
shell - run a command using shell SYNOPSIS
shell command [command] ... DESCRIPTION
The shell function concatenate its arguments, separating each by a space, and passes this string to the shell ($SHELL if set, otherwise /usr/bin/sh). EXAMPLES
Example 1 A sample output of shell command. Since the Form and Menu Language does not directly support background processing, the shell function can be used instead. `shell "build prog > /dev/null &"` If you want the user to continue to be able to interact with the application while the background job is running, the output of an exe- cutable run by shell in the background must be redirected: to a file if you want to save the output, or to /dev/null if you don't want to save it (or if there is no output), otherwise your application may appear to be hung until the background job finishes processing. shell can also be used to execute a command that has the same name as an FMLI built-in function. NOTES
The arguments to shell will be concatenate using spaces, which may or may not do what is expected. The variables set in local environments will not be expanded by the shell because "local" means "local to the current process." ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
sh(1), attributes(5) SunOS 5.11 5 Jul 1990 shell(1F)
All times are GMT -4. The time now is 10:00 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy