Sponsored Content
Full Discussion: Gzip behavior on open files?
Top Forums Shell Programming and Scripting Gzip behavior on open files? Post 302798193 by dan-e on Wednesday 24th of April 2013 02:41:19 AM
Old 04-24-2013
Thanks for your help -
That's a fair enough alternative approach but wouldn't there be a potential problem if I renamed the capture file while it was being written to by another process? Would the process continue writing to the now-renamed file?
I've been told that I cannot remove the capture file (hence the cat /dev/null) because otherwise it will break the other process that writes to the capture file. Considering this, renaming it would have the same effect as removing it wouldn't it?

It seems that the best possible solution is to somehow prevent any data being flushed to the file between the completion of archiving and the emptying of the file, but I'm not sure that this is even possible?
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

gzip, multiple files

Hello Everyone, Here is what I am trying to do. I have four text files, I want to gzip them under unix and mail the zipped file via outlook. I am able to do this easily enough, but using winzip or pkunzip to unzip the file, there is only one file. (In essence, all four files were... (2 Replies)
Discussion started by: smbodnar
2 Replies

2. UNIX for Dummies Questions & Answers

Need to gzip LARGE files

The windows version of gzip supports pretty much unlimited file sizes while the one we have in solaris only goes up to a set size, one or two gigs I think. Is there a new version of gzip I can put on our systems that supports massive file sizes? (2 Replies)
Discussion started by: LordJezo
2 Replies

3. UNIX for Dummies Questions & Answers

gzip all the files in a directory

Hi, There are multiple files in a directory with different names.How can they be gzipped such that the timestamp of the files is not changed. (2 Replies)
Discussion started by: er_ashu
2 Replies

4. Shell Programming and Scripting

unzip particular gzip files among the normal data files

Hello experts, I run Solaris 9. I have a below script which is used for gunzip the thousand files from a directory. ---- #!/usr/bin/sh cd /home/thousands/gzipfiles/ for i in `ls -1` do gunzip -c $i > /path/to/file/$i done ---- In my SAME directory there thousand of GZIP file and also... (4 Replies)
Discussion started by: thepurple
4 Replies

5. Shell Programming and Scripting

Gzip files as they are created

Hello. I have a scripting query that I am stumped on which I hope you can help with. Basically, I have a ksh script that calls a process to create n number of binary files. These files have a maximum size of 1Gb. The process can write n number of files at once (parallel operation) based on the... (4 Replies)
Discussion started by: eisenhorn
4 Replies

6. Shell Programming and Scripting

gzip the files with particular extension

Is there any way to compress only the files with .xml extension within a folder which in turn has many sub folders? gzip -r9 path/name/*.xml is not working This compression is done in the Windows server using Batch script. (2 Replies)
Discussion started by: Codesearcher
2 Replies

7. Shell Programming and Scripting

gzip files with extension

Hi, I have 1000 of files in a folder with the file extension as .csv In this some of the files are already zipped and its looks like filename.csv.gz Now i need to zip all the files in the folder to free some disk space. When i give gzip *.csv It prompts me to overwrite filename.csv.gz... (5 Replies)
Discussion started by: nokiak810
5 Replies

8. UNIX for Advanced & Expert Users

gzip vs pipe gzip: produce different file size

Hi All, I have a random test file: test.txt, size: 146 $ ll test.txt $ 146 test.txt Take 1: $ cat test.txt | gzip > test.txt.gz $ ll test.txt.gz $ 124 test.txt.gz Take 2: $ gzip test.txt $ ll test.txt.gz $ 133 test.txt.gz As you can see, gzipping a file and piping into gzip... (1 Reply)
Discussion started by: hanfresco
1 Replies

9. Shell Programming and Scripting

help with a script to gzip/move files

Hi Please can you help me in writing a script to find files on a specific directory, and of extension "tap" but only of the month of september, gzip and move them to another directory. Your help will be appreciated. (4 Replies)
Discussion started by: fretagi
4 Replies

10. Shell Programming and Scripting

tar and gzip files

Hi Guys, I am using RHEL5 and Solaris 9 & 10. I want to tar and gzip my files then remove them after a successful tar command... Lets say I have files with extension .arc then I want to tar and gzip these files. After successful tar command I want to remove all these files (i.e .arc). ... (3 Replies)
Discussion started by: Phuti
3 Replies
PCAP_ACTIVATE(3PCAP)													      PCAP_ACTIVATE(3PCAP)

NAME
pcap_activate - activate a capture handle SYNOPSIS
#include <pcap/pcap.h> int pcap_activate(pcap_t *p); DESCRIPTION
pcap_activate() is used to activate a packet capture handle to look at packets on the network, with the options that were set on the handle being in effect. RETURN VALUE
pcap_activate() returns 0 on success without warnings, PCAP_WARNING_PROMISC_NOTSUP on success on a device that doesn't support promiscuous mode if promiscuous mode was requested, PCAP_WARNING_TSTAMP_TYPE_NOTSUP on success if the time stamp type specified in a previous pcap_set_tstamp_type() call isn't supported by the capture source (the time stamp type is left as the default), PCAP_WARNING on success with any other warning, PCAP_ERROR_ACTIVATED if the handle has already been activated, PCAP_ERROR_NO_SUCH_DEVICE if the capture source specified when the handle was created doesn't exist, PCAP_ERROR_PERM_DENIED if the process doesn't have permission to open the capture source, PCAP_ERROR_PROMISC_PERM_DENIED if the process has permission to open the capture source but doesn't have permission to put it into promiscuous mode, PCAP_ERROR_RFMON_NOTSUP if monitor mode was specified but the capture source doesn't support monitor mode, PCAP_ERROR_IFACE_NOT_UP if the capture source is not up, and PCAP_ERROR if another error occurred. If PCAP_WARNING or PCAP_ERROR is returned, pcap_geterr() or pcap_perror() may be called with p as an argument to fetch or display a message describing the warning or error. If PCAP_WARNING_PROMISC_NOTSUP, PCAP_ERROR_NO_SUCH_DEVICE, or PCAP_ERROR_PERM_DENIED is returned, pcap_geterr() or pcap_perror() may be called with p as an argument to fetch or display an message giving additional details about the problem that might be useful for debugging the problem if it's unexpected. SEE ALSO
pcap(3PCAP) 5 April 2008 PCAP_ACTIVATE(3PCAP)
All times are GMT -4. The time now is 11:05 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy