Sponsored Content
Top Forums UNIX for Dummies Questions & Answers how much we can pipe in shell prompt ? Post 302354595 by adc22 on Friday 18th of September 2009 06:06:55 PM
Old 09-18-2009
Data

Quote:
Originally Posted by Corona688
There's no arbitrary limit beyond whatever limit your system has for how many processes one user is allowed to create, how much memory one user is allowed to use, and how many pipes the kernel can keep around at once. You'd probably be allowed a few dozen at minimum before the system started refusing you, depending on what the processes actually are and what limits your sysop has set.

But that doesn't make it a good idea. Joining dozens of processes in a pipe-chain would be very inefficient since each one would need to take turns running and reading and writing. What is the goal here? There's probably a better way to do it.
Today in a interview a senior person asked me this and I was not sure about the answenrs. I should have posted these questions yesterday Smilie
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

No shell prompt?

When I login to a specific machine (running Solaris 2.8; actually serveral machines behave this way), with a known good account, I don't get any shell prompt, and no screen responses to various commands such as ID and PWD. Any ideas on what is causing this, and how to change this behavior? (2 Replies)
Discussion started by: Mufasa
2 Replies

2. UNIX for Dummies Questions & Answers

prompt in sh shell

Hi, I´m using SCO Unix 5.0.5 and I want to configure de variable PS1, so when I type the command: cd /etc/ the prompt shows /etc/_> Is that possible with sh shell? I´ll appreciate your help. Thanks, a Happy New Year! (1 Reply)
Discussion started by: diegoe
1 Replies

3. UNIX for Dummies Questions & Answers

shell specific prompt

currently, I set my prompt in my .cshrc file as: set prompt = "%B%h %m %P %/ \n% " I have to use certain shells for some specific tasks and would like to set different prompts depending on the type of shell that I am using. Any advice? Thanks (3 Replies)
Discussion started by: dranNfly
3 Replies

4. UNIX for Advanced & Expert Users

Weird in Shell Prompt

Hi, I saw something in weird in Shell prompt. I did the following steps 1) Typed ls -l and pressed ESC without entering 2) Typed "v" (please notice that I did not type "i" after "v"), which opened vi editor 3) I see the "ls -l" command that I typed in shell prompt 4) Without modifying... (6 Replies)
Discussion started by: bobbygsk
6 Replies

5. Shell Programming and Scripting

Interactive shell through a pipe

I'm new to working with pipes, so I don't know whether the following is expected behaviour or a bug on the part of an application. Since Version 0.47, Inkscape provides a non-GUI interactive shell mode of operation. I am trying to time the program's performance in converting SVG files to PNG... (1 Reply)
Discussion started by: ccprog
1 Replies

6. Shell Programming and Scripting

Changing the shell prompt

Hi, I want to change the shell prompt, using the cd command. I have a shell prompt like this - p78-mfx(dgaw1078/9781)$ Now i do this - p78-mfx(dgaw1078/9781)$ cd log4j here the shell prompt should change like this - p78-mfx(dgaw1078/9781)log4j$ (6 Replies)
Discussion started by: arunkumarmc
6 Replies

7. AIX

Shell Scripting (prompt off)

Dear all experts, I have a script written to compress a list of files, during compressing, some of the files are having same name. When the compressing started, the same name file will be prompted with message whether to overwrite the old file. I need to enter "y" to continue. Is there any way I... (7 Replies)
Discussion started by: kwliew999
7 Replies

8. Shell Programming and Scripting

RFC - Korn shell prompt

Hi, I am learning shell scripting for the first time. I use AT&T Korn Shell, Version AJM 93u+ 2012-08-01, compiled from source on NetBSD. So far I have managed to set up what I think is a useful and pleasing shell prompt, which can be seen in the image attached to this post. The prompt is... (2 Replies)
Discussion started by: gezley
2 Replies

9. Homework & Coursework Questions

How to create one's own pipe in one's own shell?

Good evening, I'm trying to do my own shell and I encountered some issues while creating it. Indeed when I try such a command I have DAUPHINE> DAUPHINE> ls -l | grep terminal > fichier DAUPHINE> cat fichier My shell is named DAUPHINE Whereas I should have: Code: ... (0 Replies)
Discussion started by: AntoineCompagni
0 Replies
platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME
platform::shell - System identification support code and utilities SYNOPSIS
package require platform::shell ?1.1.4? platform::shell::generic shell platform::shell::identify shell platform::shell::platform shell _________________________________________________________________ DESCRIPTION
The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell. This package allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only requirement is that the other shell (identified by its path), is actually executable on the current machine. While for most platform this means that the architecture of the interrogated shell is identical to the architecture of the running shell this is not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run 32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers. For applications like a code repository it is important to identify the architecture of the shell which will actually run the installed packages, versus the architecture of the shell running the repository software. COMMANDS
platform::shell::identify shell This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell. platform::shell::generic shell This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell. platform::shell::platform shell This command returns the contents of tcl_platform(platform) for the specified Tcl shell. KEYWORDS
operating system, cpu architecture, platform, architecture platform::shell 1.1.4 platform::shell(n)
All times are GMT -4. The time now is 07:13 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy