I have a piping question, I am trying to implement piping on my own shell and am having some trouble...esentially I am trying to make something to do command|command|command.
I can get it to work fine if the last pipe command is not forked, but executes in the shell and then exits..but I need it to fork. I tryed the following, but it will hang..any suggestions? I have a feeling it has something to do with closing/opening descriptors but i don't know...thanks.:
Last edited by Yogesh Sawant; 04-25-2008 at 04:33 AM..
Reason: added code tags
I am using pipes (specifically piping out) in Perl to put an array from one file into an array in a different file. I can't figure out how to transfer the array. I kow how to open the pipe : open (FILEHANDLE, "| file") or die~
but how do I transfer the array. I think it has something to do with... (1 Reply)
I've got a file with lots of commands I want to run in it. They're formatted like so:
cp /path/to/file /path/to/new/file
and on and on and on.
Hundreds of them.
Anyways, I'd like to execute them one at a time, then check what time it is, and repeat this process until 7am.
I can... (3 Replies)
Is anyone piping commands to ex from scripts?
I.E. echo '%s/change this/to that/\nwq' | ex file.name
I've been using it for years with AIX, Solaris, SGI, with variations ksh and Mandriva and others with pdksh. I've just started using CentOS with ksh and it no longer works. I've tried single... (2 Replies)
Howdy folks,
I am fairly new to scripting but have lost of expirience in c++, pascal, and a few other. I am trying to complete a file search script that is sent a file name containing data to search that is arranged like this
"id","name","rating"
"1","bob","7"
etc
and an argument to... (1 Reply)
Hi All,
I am trying to perform the below csh code in Perl, but i am unfamiliar with Perl. Can anybody give me some advice on it ?
Csh Code:
cat filename |grep AAA| grep BBB| awk '{print("already_appended")' (11 Replies)
There are are lots of examples of piping output FROM the 'ls' command TO another command, but how does one pipe output TO the 'ls -l' command?
For example, use 'which' to find a file, then use 'ls -l' to view the permissions, groups, etc. in a single step:
which <filename> | ls -l
returns... (4 Replies)
Hi,
I need to use a double grep so to speak. I need to grep for a particular item say BOB and then for each successful result I need to grep for another item say SMITH.
I tried grep "BOB" filename | grep "SMITH"
but it does not seem to work.
I can achieve my desired result using an... (12 Replies)
Hi everybody,
I have a big file with blast results (if you know what this means, otherwise look at it just as a text file with a specific form).
I am trying to extract some ids from within this file, which have certain parameters.
For example, some Of my IDs have the term 'No hit results'... (1 Reply)
Hi everybody,
I have a big file with blast results (if you know what this means, otherwise look at it just as a text file with a specific form).
I am trying to extract some ids from within this file, which have certain parameters.
For example, some Of my IDs have the term 'No hit results'... (6 Replies)
Hi
I am tryin to undertand piping
command1|command2
from what i learn output of cammand 2 is an intput for command 1 right?
If so .
What dose next sequence do
cat f1 >> f2 | grep '^'
I think it takes context of f1 and Concatenate's it to f2 and then looks for ....i don't know..... (7 Replies)
Discussion started by: iliya24
7 Replies
LEARN ABOUT DEBIAN
git-pack-redundant
GIT-PACK-REDUNDANT(1) Git Manual GIT-PACK-REDUNDANT(1)NAME
git-pack-redundant - Find redundant pack files
SYNOPSIS
git pack-redundant [ --verbose ] [ --alt-odb ] < --all | .pack filename ... >
DESCRIPTION
This program computes which packs in your repository are redundant. The output is suitable for piping to xargs rm if you are in the root of
the repository.
git pack-redundant accepts a list of objects on standard input. Any objects given will be ignored when checking which packs are required.
This makes the following command useful when wanting to remove packs which contain unreachable objects.
git fsck --full --unreachable | cut -d ' ' -f3 | git pack-redundant --all | xargs rm
OPTIONS --all
Processes all packs. Any filenames on the command line are ignored.
--alt-odb
Don't require objects present in packs from alternate object directories to be present in local packs.
--verbose
Outputs some statistics to stderr. Has a small performance penalty.
SEE ALSO git-pack-objects(1)git-repack(1)git-prune-packed(1)GIT
Part of the git(1) suite
Git 1.7.10.4 11/24/2012 GIT-PACK-REDUNDANT(1)