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1. Programming
I understand that fork create a child but I need very simple example that make child useful....
I mean how will make the program faster anyone explain with code plz
using C plz (2 Replies)
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2. UNIX for Dummies Questions & Answers
I'm trying to run a simple test on how to use fork(), i'm able to execute the child process first then the parent, but how can I execute parent then child..?
Thanks! (1 Reply)
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3. Programming
Hello people.
I'm trying to do something like a search engine.
Server runs in the background by using ./server & which has data from a textfile stored in an array.
Client then runs by using ./client
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4. Programming
I need to write a program which creates some n number of processes first and also creates a fifo for each of them, then it connects to the server and..
I tried creating these processes with fork() in a for loop but it doesn't print out what i write inside the child..
for(int count = 0; count... (7 Replies)
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5. Programming
Hi everybody,
I wanna write a code to understand how fork works.
my target
--------------
-Parent creates a file(called temp) and writes into this file "1".Then it closes the file.
-Then parent creates a child and wait until execution of this child ends.
-Then child opens the same... (3 Replies)
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6. Programming
hi all
About this code
for (i = 1; i < n; i++)
if ((childpid = fork()) <= 0)
break;
I really can't understand the output .
and the way fork () return the value .
how about the process Id ,the child process Id and the parent ID
in this case
so please answer me soon (5 Replies)
Discussion started by: iwbasts
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7. Programming
hello,
Every time i use fork() in the for loop, my college network(which i work in) either gets slow or hangs up.Can any 1 explain why it is so?
Of course there is no use of doing it though. But still i want to clear my doubt.
Thanks (2 Replies)
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8. Programming
I run this code, actually I want to both processes print the message from "data". But only one does. What happens? Anyone can help?
#include <stdio.h>
main(){
int fd, pid;
char x;
fd = open("data",0); /* open file "data" */
pid = fork();
if(pid != 0){
wait(0);
... (2 Replies)
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9. Shell Programming and Scripting
I need a quick script that will serve as a sort of "real time monitor" for watching some log files. I am using Bourne shell in HP-UX 10.20. I have basically created a script that never ends, unless of course I manually terminate it. Here's the script (it's called qhistory):
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10. UNIX for Dummies Questions & Answers
What is a fork? Why would one create a fork? What are the advantages and disadvantages of using a fork?
Please advise.
Thank You.
Deepali (5 Replies)
Discussion started by: Deepali
5 Replies
usoc(7D) Devices usoc(7D)
NAME
usoc - universal serial optical controller for Fibre Channel arbitrated loop (SOC+) device driver
DESCRIPTION
The Fibre Channel adapter is an SBus card that implements two full duplex Fibre Channel interfaces. Each interface can connect to a Fibre
Channel arbitrated loop (FC-AL). The usoc device driver is a nexus driver and implements portions of the FC-2 and FC-4 layers of FC-AL.
FILES
/kernel/drv/usoc
32-bit ELF kernel module
/kernel/drv/sparcv9/usoc
64-bit ELF kernel module
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Architecture |SPARC |
+-----------------------------+-----------------------------+
|Interface stability |Unknown |
+-----------------------------+-----------------------------+
|Availability |SUNWusoc |
+-----------------------------+-----------------------------+
SEE ALSO
fctl(7D), sbus(4), fcp(7D), fp(7D), ssd(7D)
Writing Device Drivers
Fibre Channel Physical and Signaling Interface (FC-PH) ANSI X3.230: 1994
Fibre Channel Arbitrated Loop (FC-AL) ANSI X3.272-1996
Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA) NCITS TR-19:1998
Fabric Channel Loop Attachment (FC-FLA), NCITS TR-20:1998
DIAGNOSTICS
The following messages are logged and may also appear on the system console. On the console these messages are preceded by:
usoc%d:
where
usoc%d:
is the per-port instance number of the usoc controller.
Fibre Channel is ONLINE
The Fibre Channel loop is now online.
Fibre Channel Loop is ONLINE
The Fibre Channel loop is now online.
Fibre Channel Loop is OFFLINE
The Fibre Channel loop is now offline.
attach failed: device in slave-only slot.
Move soc+ card to another slot.
attach failed: alloc soft state.
Driver did not attach, devices will be inaccessible.
attach failed: bad soft state.
Driver did not attach, devices will be inaccessible.
attach failed: unable to map eeprom
Driver was unable to map device memory; check for bad hardware. Driver did not attach to device, devices will be inaccessible.
attach failed: unable to map XRAM
Driver was unable to map device memory; check for bad hardware. Driver did not attach to device, devices will be inaccessible.
attach failed: unable to map registers
Driver was unable to map device registers; check for bad hardware. Driver did not attach to device, devices will be inaccessible.
attach failed: unable to access status register
Driver was unable to map device registers; check for bad hardware. Driver did not attach to device, devices will be inaccessible.
attach failed: unable to install interrupt handler
Driver was not able to add the interrupt routine to the kernel. Driver did not attach to device, devices will be inaccessible.
attach failed: unable to access host adapter XRAM
Driver was unable to access device RAM; check for bad hardware. Driver did not attach to device, devices will be inaccessible.
attach failed: unable to write host adapter XRAM
Driver was unable to write device RAM; check for bad hardware. Driver did not attach to device, devices will be inaccessible.
attach failed: read/write mismatch in XRAM
Driver was unable to verify device RAM; check for bad hardware. Driver did not attach to device, devices will be inaccessible.
SunOS 5.10 20 Jul 1999 usoc(7D)