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Contact Us Post Here to Contact Site Administrators and Moderators My shell pipe 2 multipipes thread is lost ? Post 302299278 by jack2 on Thursday 19th of March 2009 05:37:59 PM
Old 03-19-2009
Quote:
Originally Posted by Neo
It is not a problem at all.

We simple to not submit user profiles to Google in our site map and we also block the profiles from crawling, because we optimize this site for content, not user profile information.

If you want to search by user user name, Google is not the best way, in these forums. Other forums might permit Google to crawl individual profiles or include them in their site maps, but we don't since most users are interested in the content via Google, not searching for their own posts.

There are better ways than Google to find your own posts. You can easily get them from your profile page too.
Ok.
But I don't use Google Custom Search.
I use Search Forums / (x) Show Posts

entering "jack2" as a query string
I get
The UNIX and Linux Forums - Search Results
4 results only and,
as you can see
the following thread is lost
https://www.unix.com/shell-programmin...t-2-pipes.html

So one time a new thread is indexed by poster's name
and another time is not.

I don't know what search engine is behind
Search Forums
and what options are set, but it works as it worked in the above examples

I am fully aware , your excellent forum is visited by many visitors,
so some fine tuning was necessary due to high traffic
" Your search is in progress and you will be taken to the results in a moment. Thank you for your patience.
"
Really excellent place.


Jack

 

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PIPE(2) 							System Calls Manual							   PIPE(2)

NAME
pipe - create an interprocess communication channel SYNOPSIS
pipe(fildes) int fildes[2]; DESCRIPTION
The pipe system call creates an I/O mechanism called a pipe. The file descriptors returned can be used in read and write operations. When the pipe is written using the descriptor fildes[1] up to 4096 bytes of data are buffered before the writing process is suspended. A read using the descriptor fildes[0] will pick up the data. It is assumed that after the pipe has been set up, two (or more) cooperating processes (created by subsequent fork calls) will pass data through the pipe with read and write calls. The shell has a syntax to set up a linear array of processes connected by pipes. Read calls on an empty pipe (no buffered data) with only one end (all write file descriptors closed) returns an end-of-file. Pipes are really a special case of the socketpair(2) call and, in fact, are implemented as such in the system. A signal is generated if a write on a pipe with only one end is attempted. RETURN VALUE
The function value zero is returned if the pipe was created; -1 if an error occurred. ERRORS
The pipe call will fail if: [EMFILE] Too many descriptors are active. [ENFILE] The system file table is full. [EFAULT] The fildes buffer is in an invalid area of the process's address space. SEE ALSO
sh(1), read(2), write(2), fork(2), socketpair(2) BUGS
Should more than 4096 bytes be necessary in any pipe among a loop of processes, deadlock will occur. 4th Berkeley Distribution August 26, 1985 PIPE(2)
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