Sponsored Content
Full Discussion: convoluted code
The Lounge War Stories convoluted code Post 302667073 by Corona688 on Thursday 5th of July 2012 02:45:43 PM
Old 07-05-2012
Quote:
Originally Posted by alister
My post isn't intended to suggest that bash (or dash or bourne sh) violate the standard -- I'm aware that POSIX allows a shell to execute each component of a pipeline in either the current environment or a subshell (ksh is compliant in this respect); the post is merely a response to methyl's rumination on the popularity of the idiom, identifying one popular resource which promotes it.
You weren't that wordy about it at the time; you simply said your first impulse was to "blame GNU bash". That's a bit of a sore point -- BASH, as a shell many new users start with, has a low value in some admin's eyes -- the habit of new users calling all shell scripting "bash scripts" doesn't help -- and seems to get blamed for everything from their own bugs to poor weather as a result. Even though it's just doing what a Bourne shell does. Blame him if you must. Smilie

Quote:
In my opinion, the ksh approach makes life a little easier.
Perhaps, but it's not something that can really be changed now. Bourne is what it is, and changing the ordering would change what happens in a lot of scripts because it cuts both ways -- suddenly scripts could be setting variables in the main shell they never did before...

I bet BASH'll add it as one of it's many fiddly setopt options someday.
 

6 More Discussions You Might Find Interesting

1. Programming

how i prepare a c++ code(c code) for implementing my own protocol format

helo my protocol format is given below { destno,mode,no.of packet,pktsize,,pktno,textsize,CRC} description:- { is starting flag destno - 4bytes mode - 1 byte no.of pkt - 4byes pktsize - 6 bytes ... (1 Reply)
Discussion started by: amitpansuria
1 Replies

2. Shell Programming and Scripting

translate ksh code to csh code

hi all, Can any 1 help me translate this korn shell code to C shell code : email=$(grep "^$1" $folder/config_2.txt | awk '{print $2'}) In config_2.txt the content is : which mean in korn shell , $1=groupname and $2=email address. Now i need to write in C shell script,when i set the... (2 Replies)
Discussion started by: proghack
2 Replies

3. UNIX for Dummies Questions & Answers

If ‘922’ Code does not exist on ‘03’ Record, ‘901’ Code will be there instead, move ‘03’ R

01,011600033,011600033,110516,0834,2,90,,2/ 02,011600033,011103093,1,110317,0834,,2/ 03,105581,,015,+00000416418,,,901,+00000000148,,,922,+000000 00354,,/ 03,113806,,015,+00000559618,,,901,+00000000096,,,922,+000000 00621,,/ 88,902,+0000000025218,,/... (1 Reply)
Discussion started by: sgoud
1 Replies

4. Shell Programming and Scripting

Block of code replacement in Java source code through Unix script

Hi, I want to remove the following code from Source files (or replace the code with empty.) from all the source files in given directory. finally { if (null != hibernateSession && hibernateSession.isOpen()) { //hibernateSession.close(); } } It would be great if the script has... (2 Replies)
Discussion started by: hareeshram
2 Replies

5. Linux

Go to a line of code , skip few lines of code

Hi , I have a code where i am using a infinite while loop . some thing like below while do if then #go to line 20 fi command 1; command 2; #line 20: sleep 34; (5 Replies)
Discussion started by: Paarth
5 Replies

6. UNIX for Advanced & Expert Users

Trying to use a convoluted for loop with VLC and Parallel or OpenMPI with no success. Help?

I have about 12,000,000 mod files I'm trying to turn into a test of "unlimited cloud storage" by running them all through VLC and blowing them into mp3 files. I can get this to work serially but when trying to use openMPI or Parallel, something in the syntax is tripping it up some. Here is an... (1 Reply)
Discussion started by: sparticus414
1 Replies
SYSPROFILE(8)						      System Manager's Manual						     SYSPROFILE(8)

NAME
sysprofile - modular centralized shell configuration DESCRIPTION
sysprofile is a generic approach to configure shell settings in a modular and centralized way mostly aimed at avoiding work for lazy sysad- mins. It has only been tested to work with the bash shell. It basically consists of the small /etc/sysprofile shell script which invokes other small shell scripts having a .bash suffix which are contained in the /etc/sysprofile.d/ directory. The system administrator can drop in any script he wants without any naming convention other than that the scripts need to have a .bash suffix to enable automagic sourcing by /etc/sysprofile. This mechanism is set up by inserting a small shell routine into /etc/profile for login shells and optionally into /etc/bashrc and/or /etc/bash.bashrc for non-login shells from where the actual /etc/sysprofile script is invoked: if [ -f /etc/sysprofile ]; then . /etc/sysprofile fi For using "sysprofile" under X11, one can source it in a similar way from /etc/X11/Xsession or your X display manager's Xsession file to provide the same shell environment as under the console in X11. See the example files in /usr/share/doc/sysprofile/ for illustration. For usage of terminal emulators with a non-login bash shell under X11, take care to enable sysprofile via /etc/bash.bashrc. If not set this way, your terminal emulators won't come up with the environment defined by the scripts in /etc/sysprofile.d/. Users not wanting /etc/sysprofile to be sourced for their environment can easily disable it's automatic mechanism. It can be disabled by simply creating an empty file called $HOME/.nosysprofile in the user's home directory using e.g. the touch(1) command. Any single configuration file in /etc/sysprofile.d/ can be overridden by any user by creating a private $HOME/.sysprofile.d/ directory which may contain a user's own version of any configuration file to be sourced instead of the system default. It's names have just to match exactly the system's default /etc/sysprofile.d/ configuration files. Empty versions of these files contained in the $HOME/.syspro- file.d/ directory automatically disable sourcing of the system wide version. Naturally, users can add and include their own private script inventions to be automagically executed by /etc/sysprofile at login time. OPTIONS
There are no options other than those dictated by shell conventions. Anything is defined within the configuration scripts themselves. SEE ALSO
The README files and configuration examples contained in /etc/sysprofile.d/ and the manual pages bash(1), xdm(1x), xdm.options(5), and wdm(1x). Recommended further reading is everything related with shell programming. If you need a similar mechanism for executing code at logout time check out the related package syslogout(8) which is a very close compan- ion to sysprofile. BUGS
sysprofile in its current form is mainly restricted to bash(1) syntax. In fact it is actually a rather embarrassing quick and dirty hack than anything else - but it works. It serves the practical need to enable a centralized bash configuration until something better becomes available. Your constructive criticism in making this into something better" is very welcome. Before i forget to mention it: we take patches... ;-) AUTHOR
sysprofile was developed by Paul Seelig <pseelig@debian.org> specifically for the Debian GNU/Linux system. Feel free to port it to and use it anywhere else under the conditions of either the GNU public license or the BSD license or both. Better yet, please help to make it into something more worthwhile than it currently is. SYSPROFILE(8)
All times are GMT -4. The time now is 01:39 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy