Sponsored Content
Top Forums UNIX for Dummies Questions & Answers gzip produces different output from the same input Post 302433319 by pludi on Tuesday 29th of June 2010 08:11:02 AM
Old 06-29-2010
Because gzip saves, into the file, the modification time of the file, as well as the original file name if possible:
Code:
$ echo "TestTestTest" > test1.txt
$ stat test1.txt
  File: `test1.txt'
  Size: 13              Blocks: 8          IO Block: 4096   regular file
Device: 801h/2049d      Inode: 1872126     Links: 1
Access: (0644/-rw-r--r--)  Uid: (    1000/   pludi)   Gid: (  100/   users)
Access: 2010-06-29 14:04:56.000000000 +0200
Modify: 2010-06-29 14:04:56.000000000 +0200
Change: 2010-06-29 14:04:56.000000000 +0200
$ gzip -9c test1.txt > test1_1.txt.gz
$ touch test1.txt
$ stat test1.txt
  File: `test1.txt'
  Size: 13              Blocks: 8          IO Block: 4096   regular file
Device: 801h/2049d      Inode: 1872126     Links: 1
Access: (0644/-rw-r--r--)  Uid: (    1000/   pludi)   Gid: (  100/   users)
Access: 2010-06-29 14:05:14.000000000 +0200
Modify: 2010-06-29 14:05:14.000000000 +0200
Change: 2010-06-29 14:05:14.000000000 +0200
$ gzip -9c test1.txt > test1_2.txt.gz
$ md5sum test1_?.txt.gz
de2048a553d7f5fe9815f4d0f0c286e3  test1_1.txt.gz
02e66fb2b786c4585f012dff592010f3  test1_2.txt.gz
$ file test1_?.txt.gz
test1_1.txt.gz: gzip compressed data, was "test1.txt", from Unix, last modified: Tue Jun 29 14:04:56 2010, max compression
test1_2.txt.gz: gzip compressed data, was "test1.txt", from Unix, last modified: Tue Jun 29 14:05:14 2010, max compression

If it can't save the original files modification time (eg because it's being piped into gzip) it saves the creation time of the compressed file instead.
This User Gave Thanks to pludi For This Post:
 

10 More Discussions You Might Find Interesting

1. Linux

vgscan produces no output using file descriptors on Oracle Enterprise Linux.

I wrote a simple program which will create a child process to execute a command and the output will be redirected to the file. Please have a look at the following code -> #include <stdio.h> #include <stdlib.h> #include <sys/stat.h> #include <fcntl.h> void execute(char **argv) { ... (0 Replies)
Discussion started by: sandiworld
0 Replies

2. Shell Programming and Scripting

Dynamic output file generation using a input text file with predefined output format

Hi, I have two files , one file with data file with attributes that need to be sent to another file to generate a predefined format. Example: File.txt AP|{SSHA}VEEg42CNCghUnGhCVg== APVG3|{SSHA}XK|"password" AP3|{SSHA}XK|"This is test" .... etc --------- test.sh has... (1 Reply)
Discussion started by: hudson03051nh
1 Replies

3. Shell Programming and Scripting

Using piped input to gzip

Can anyone tell me why does'nt the following command work? find /gfp1/home/arijit -name "*.sas7bdat" | gzip I am trying to compress all files with extension sas7bdat with gzip. It gives error message gzip: compressed data not written to a terminal. Use -f to force compression.... (5 Replies)
Discussion started by: bs0409
5 Replies

4. 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

5. Shell Programming and Scripting

Redirect output to tar.gzip

I would like to make a listing of files in a large directory and output it to tar.gz. Is it possible to do this in one command? For example; I would like the text output from this command to be outputted to a directory.tar.gz file. ls -al -R /bigdir Is it possible to do it in memory... (5 Replies)
Discussion started by: lewk
5 Replies

6. UNIX for Dummies Questions & Answers

linux sort command produces strange output

cat a .a ba .b bb .c bc sort a .a .b ba bb bc .c NOTE: .a and .b appears before ba and bb, where as .c appears after bc. In general (3 Replies)
Discussion started by: ajb
3 Replies

7. Shell Programming and Scripting

Need a shell script to compare two directories and produces the output

Hi, I am using solaris OS 10 and Bash shell.I need a script which will compare the two directories and produces the output. Step 1: In detail say suppoose I have machine one and have a directory dir1. Script should iterate through the directories and subdirectories inside and produce the output... (10 Replies)
Discussion started by: muraliinfy04
10 Replies

8. AIX

Gzip status output is not redirecting.

Dear all I am facing issue in one part of my script. in this part i am trying to zip the files but want the status to be redirected to a text file YAMVASSRV02_vas> YAMVASSRV02_vas> cat final_col.sh gzip -cv /data01/oracle/oradata/vas/control/control01.ctl > ... (2 Replies)
Discussion started by: javeedkaleem
2 Replies

9. Shell Programming and Scripting

awk runs and produces output but with error

When I run the awk below, I get an error message awk -v OFS='\t' '$(NF-1)=="Benign" || ($(NF-2) OFS $(NF-1))=="Likely Benign" {$(NF)=$(NF-2) OFS $(NF-1)} {print $0 }' input awk: cmd. line:1: (FILENAME=VUS FNR=8) fatal: attempt to access field -1 input Chr Start End Ref ... (6 Replies)
Discussion started by: cmccabe
6 Replies

10. Shell Programming and Scripting

Printing the output of a gzip command intact

how can i get the printf command or the echo command to print the data that are inbetween the first and the last quotes? #!/bin/sh printf '%s\n' "^_<8b>^H^@U<8c>MX^@^Cí=ÙzÚH<97>×ð^Teìn<8c>Ób_<9d><9f>dXd<9b>^N^F7<82>8qâÎ'^K^Y^T<83>D<90>°M^Lý^Hó^Fs5w3ß|s5/ÐýbS%©<84>^DBH... (4 Replies)
Discussion started by: SkySmart
4 Replies
gst-md5sum-0.8(1)						   User Commands						 gst-md5sum-0.8(1)

NAME
gst-md5sum-0.8, gst-md5sum - get an md5sum of a GStreamer pipeline through md5sink SYNOPSIS
gst-md5sum-0.8 [--verbose] [gst-std-options] [partial-pipeline-description] gst-md5sum [--verbose] [gst-std-options] [partial-pipeline-description] [--gst-list-mm] [--gst-mm=string] [--print] DESCRIPTION
gst-md5sum-0.8 generates MD5 checksums of the data generated by a GStreamer pipeline. In theory, both of the following commands should print out the same checksum: gst-md5sum-0.8 filesrc location=music.mp3 md5sum music.mp3 If the pipeline contains an md5sink element, gst-md5sum-0.8 queries it for the md5sum at the end of pipeline iteration. If the pipeline does not contain an md5sink element, gst-md5sum-0.8 automatically connects an md5sink to the right-hand side of the given pipeline. See gst-launch(1) or the GStreamer documentation for more information on how to create a partial-pipeline-description. gst-md5sum is a wrapper script that runs the latest installed version of gst-md5sum-X.X. For example, if both gst-md5sum-0.7 and gst- md5sum-0.8 are installed on your system, gst-md5sum runs gst-md5sum-0.8. OPTIONS
The following options are supported by gst-md5sum-0.8 and gst-md5sum: --verbose Output verbose information. You can also use -v to specify this option. gst-std-options Standard options available for use with most GStreamer applications. See gst-std-options(5) for more information. The following options are supported by gst-md5sum only: --gst-list-mm List found major/minor versions. This option displays the versions that are available. --gst-mm=string Force major/minor version. This option enables you to specify a specific version to run, if you do not want to run the default version. --print Print wrapped command line. This option displays the command that will be run, and then runs the command. OPERANDS
The following operands are supported: partial-pipelinePartialppipeline description. EXAMPLES
Example 1: Running the Wrapper Script and Displaying the Command Name example% gst-md5sum --print /usr/bin/gst-md5sum-0.8 FILES
The following files are used by this application: /usr/bin/gst-md5sum-0.8 Executable for GNOME help browser /usr/bin/gst-md5sum Wrapper script that runs the latest installed version of gst-md5sum-X.X ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWgnome-media | +-----------------------------+-----------------------------+ |Interface stability |External | +-----------------------------+-----------------------------+ SEE ALSO
gst-complete(1), gst-compprep(1), gst-feedback(1), gst-inspect(1), gst-launch(1), gst-launch-ext(1), gst-register(1), gst-thumbnail(1), gst-typefind(1), gst-xmlinspect(1), gst-xmllaunch(1), gstreamer-properties(1), libgstreamer-0.8(3), libgstgetbits(3), gst-std-options(5) NOTES
Original man page written by the GStreamer team at http://gstreamer.net/. Updated by Brian Cameron, Sun Microsystems Inc., 2004. SunOS 5.10 14 Oct 2004 gst-md5sum-0.8(1)
All times are GMT -4. The time now is 09:14 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy