|
|
Sponsored Content
Top Forums
Programming
forks, ipc, fifos, update issues...
Post 85006 by Funktar on Friday 30th of September 2005 02:26:00 AM
09-30-2005
|
|
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hey guys,
I'm given this bit of code, but, I'm having some problems executing it with the functions I've defined so far. I'm suppose to define the funtions "parse" and "execute." Parse splits the command in buf into individual arguments. It strips whitespace, replacing those it finds with NULLS... (3 Replies)
Discussion started by: richardspence2
3 Replies
2. 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
3. Linux
This isn't strictly a Linux question, but... I've been working on a project to archive some streaming media for time shifting using 'mplayer' and have been using FIFOs to archive in Ogg Vorbis format:
mkfifo program_name.wav
(mplayer -ao pcm -aofile program_name.wav &)... (0 Replies)
Discussion started by: deckard
0 Replies
4. 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
5. UNIX for Advanced & Expert Users
I am trying to figure out why when i have the following code
int main( { printf("0\n"); fork(); printf("1\n"); exit(0);}
and type in the shell
a.out | cat
the output of this program is
0
1
0
1
instead of
0
1
1
does anyone know? (3 Replies)
Discussion started by: Phantom12345
3 Replies
6. Programming
i'm tring to make 2 processes each read from the same file but only one of them read the file.
FILE * fileptr1;
fileptr1 = fopen("file1.txt","rt");
pid2=fork();
while(1)
{
fscanf(fileptr1,"%s",temp1);
if(feof(fileptr1)==0)
{
printf("%i",getpid()); //id of current process ... (6 Replies)
Discussion started by: ddx08
6 Replies
7. 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
8. Solaris
I was asked to look into a problem with a Sun Netra 440 in another department. On the server in question, the relevant 'uname -a' information is, "SunOS host1 5.9 Generic_118558-16 sun4u sparc SUNW,Netra-440". That information aside, while the other admin is logged into the ALOM, these errors are... (0 Replies)
Discussion started by: Borealis
0 Replies
9. 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
10. Red Hat
Hi guys,
thanks for your kind assistance. I have a rhel6.4 server. After I did an update, the server does not reboot. Also user logins take for ever.
Please any help on this matter will be appreciated .
Thank you (2 Replies)
Discussion started by: cjashu
2 Replies
LEARN ABOUT LINUX
sys::hostname::long
Sys::Hostname::Long(3pm) User Contributed Perl Documentation Sys::Hostname::Long(3pm) NAME
Sys::Hostname::Long - Try every conceivable way to get full hostname SYNOPSIS
use Sys::Hostname::Long; $host_long = hostname_long; DESCRIPTION
How to get the host full name in perl on multiple operating systems (mac, windows, unix* etc) DISCUSSION
This is the SECOND release of this code. It has an improved set of tests and improved interfaces - but it is still often failing to get a full host name. This of course is the reason I wrote the module, it is difficult to get full host names accurately on each system. On some systems (eg: Linux) it is dependent on the order of the entries in /etc/hosts. To make it easier to test I have testall.pl to generate an output list of all methods. Thus even if the logic is incorrect, it may be possible to get the full name. Attempt via many methods to get the systems full name. The Sys::Hostname class is the best and standard way to get the system hostname. However it is missing the long hostname. Special thanks to David Sundstrom and Greg Bacon for the original Sys::Hostname SUPPORT
This is the original list of platforms tested. MacOS Macintosh Classic OK Win32 MS Windows (95,98,nt,2000...) 98 OK MacOS X Macintosh 10 OK (other darwin) Probably OK (not tested) Linux Linux UNIX OS OK Sparc OK HPUX H.P. Unix 10? Not Tested Solaris SUN Solaris 7? OK (now) Irix SGI Irix 5? Not Tested FreeBSD FreeBSD OK A new list has now been compiled of all the operating systems so that I can individually keep informaiton on their success. THIS IS IN NEED OF AN UPDATE AFTER NEXT RELEASE. Acorn - Not yet tested AIX - Not yet tested Amiga - Not yet tested Atari - Not yet tested AtheOS - Not yet tested BeOS - Not yet tested BSD - Not yet tested BSD/OS - Not yet tested Compaq - Not yet tested Cygwin - Not yet tested Concurrent - Not yet tested DG/UX - Not yet tested Digital - Not yet tested DEC OSF/1 - Not yet tested Digital UNIX - Not yet tested DYNIX/ptx - Not yet tested EPOC - Not yet tested FreeBSD - Not yet tested Fujitsu-Siemens - Not yet tested Guardian - Not yet tested HP - Not yet tested HP-UX - Not yet tested IBM - Not yet tested IRIX - Not yet tested - 3rd hand information might be ok. Japanese - Not yet tested JPerl - Not yet tested Linux Debian - Not yet tested Gentoo - Not yet tested Mandrake - Not yet tested Red Hat- Not yet tested Slackware - Not yet tested SuSe - Not yet tested Yellowdog - Not yet tested LynxOS - Not yet tested Mac OS - Not yet tested Mac OS X - OK 20040315 (v1.1) MachTen - Not yet tested Minix - Not yet tested MinGW - Not yet tested MiNT - Not yet tested MPE/iX - Not yet tested MS-DOS - Not yet tested MVS - Not yet tested NetBSD - Not yet tested NetWare - Not yet tested NEWS-OS - Not yet tested NextStep - Not yet tested Novell - Not yet tested NonStop - Not yet tested NonStop-UX - Not yet tested OpenBSD - Not yet tested ODT - Not yet tested OpenVMS - Not yet tested Open UNIX - Not yet tested OS/2 - Not yet tested OS/390 - Not yet tested OS/400 - Not yet tested OSF/1 - Not yet tested OSR - Not yet tested Plan 9 - Not yet tested Pocket PC - Not yet tested PowerMAX - Not yet tested Psion - Not yet tested QNX 4 - Not yet tested 6 (Neutrino) - Not yet tested Reliant UNIX - Not yet tested RISCOS - Not yet tested SCO - Not yet tested SGI - Not yet tested Symbian - Not yet tested Sequent - Not yet tested Siemens - Not yet tested SINIX - Not yet tested Solaris - Not yet tested SONY - Not yet tested Sun - Not yet tested Stratus - Not yet tested Tandem - Not yet tested Tru64 - Not yet tested Ultrix - Not yet tested UNIX - Not yet tested U/WIN - Not yet tested Unixware - Not yet tested VMS - Not yet tested VOS - Not yet tested Windows CE - Not yet tested 3.1 - Not yet tested 95 - Not yet tested 98 - Not yet tested Me - Not yet tested NT - Not yet tested 2000 - Not yet tested XP - Not yet tested z/OS - Not yet tested KNOWN LIMITATIONS
Unix Most unix systems have trouble working out the fully quallified domain name as it to be configured somewhere in the system correctly. For example in most linux systems (debian, ?) the fully qualified name should be the first entry next to the ip number in /etc/hosts 192.168.0.1 fred.somwhere.special fred If it is the other way around, it will fail. Mac TODO
Contributions David Dick Graeme Hart Piotr Klaban * Extra code from G * Dispatch table * List of all operating systems. Solaris * Fall back 2 - TCP with DNS works ok * Also can read /etc/defaultdomain file SEE ALSO
L<Sys::Hostname> AUTHOR
Scott Penrose <scottp@dd.com.au> COPYRIGHT
Copyright (c) 2001,2004,2005 Scott Penrose. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.10.0 2005-06-25 Sys::Hostname::Long(3pm)