9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I found this in a script and I would like to know how this works
Code is here:
# var1=PART1_PART2
# var2=${var1##*_}
# echo $var2
PART2
I'm wondering how ##* makes the Shell to understand to pick up the last value from the given. (2 Replies)
Discussion started by: sathyaonnuix
2 Replies
2. Programming
I want to have a message send & receive through 2 uni-direction FIFO
Flow of data
FIFO1
stdin--->parent(client) writefd--->FIFO1-->child(server) readfd
FIFO2
child(server) writefd2---->FIFO2--->parent(client) readfd2--->stdout
I need to have boundary structed message... (3 Replies)
Discussion started by: ouou
3 Replies
3. UNIX for Dummies Questions & Answers
Hi Gurus:
I am trying to understand the following line of code.I did enough of googling to understand but no luck.Please help me understand the follow chunk of code:
X=$0
MOD=${X%/*}/env.ksh
X is the current script from which I am trying to execute.
Say if X=test.ksh
$MOD is echoing :... (3 Replies)
Discussion started by: vemana
3 Replies
4. Shell Programming and Scripting
I just started shell coding and I'm a bit confused on how 'mv' works can someone explain to me how it works and if i did this correctly. Thanks.
echo "Enter Name of the first file:"
read file1
#echo $file1
if ; then
echo "Sorry, file does not exist."
exit 1
... (16 Replies)
Discussion started by: taiL
16 Replies
5. UNIX for Dummies Questions & Answers
Hi there,
I start using the function shutdown instead of reboot + poweroff.
But there are some points that are not explained in the man pages.
1) What is the usage of the t swith.
Both commands will display the message immediatly on every terminal and shutdown at 22:30. Where is the... (6 Replies)
Discussion started by: chebarbudo
6 Replies
6. UNIX for Advanced & Expert Users
Is there a performance advantage of one of these over the other? Obviously, it makes no sense to use normal TCP sockets or UDP sockets w/ the overhead they carry. But what about UNIX domain sockets vs FIFOs? I'd think they'd be very similar, in terms of performance and in terms of how they're... (2 Replies)
Discussion started by: mgessner
2 Replies
7. UNIX for Advanced & Expert Users
How can I make tar read data from a fifo, instead of storing it as a fifo? (8 Replies)
Discussion started by: Corona688
8 Replies
8. Programming
Hi, so I've got this program("main") that fork executes another ("user"). These programs communicate through fifos.
One communication is a spawn call, where user passes an executable, main forks and executes it. So, I'm keeping track of all my processes using a task table. After the fork (for... (6 Replies)
Discussion started by: Funktar
6 Replies
9. Programming
omg i need help so bad. I've been working on a school project for what seems like an eternity and i'm close to deadline. Using FIFO's (i ahve to) to communicate between parent and child proc's. Right now I'm stuck on a read/write.
fifomsg is a struct with int length and char message fields. ... (5 Replies)
Discussion started by: Funktar
5 Replies