09-23-2008
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
hi, is there any command where we can monitor semaphores? (1 Reply)
Discussion started by: yls177
1 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I'm new to UNIX.
I need to know what's a semaphore
Do reply.
Thanks
VJ (3 Replies)
Discussion started by: vjsony
3 Replies
3. Filesystems, Disks and Memory
Hello,
I have a Supermicro server with a P4SCI mother board running Debian Sarge 3.1. This is the "dmidecode" output related to RAM info:
RAM speed information is incomplete.. "Current Speed: Unknown", is there anyway/soft to get the speed of installed RAM modules? thanks!!
Regards :)... (0 Replies)
Discussion started by: Santi
0 Replies
4. Shell Programming and Scripting
Hi,
I am looking to use a semaphore for the first time in one of my scripts. I am just wondering if there are any simple examples or tutorials around?
I am a beginner so the simpler the better :)
Thanks
-Jaken (2 Replies)
Discussion started by: Jaken
2 Replies
5. UNIX for Dummies Questions & Answers
what is semaphore? can any body explain it in a more simple way than the manual ??
replies appreciated
Regards
raguram R (7 Replies)
Discussion started by: raguramtgr
7 Replies
6. Filesystems, Disks and Memory
I analysed disk performance with blktrace and get some data:
read:
8,3 4 2141 2.882115217 3342 Q R 195732187 + 32
8,3 4 2142 2.882116411 3342 G R 195732187 + 32
8,3 4 2144 2.882117647 3342 I R 195732187 + 32
8,3 4 2145 ... (1 Reply)
Discussion started by: W.C.C
1 Replies
7. Shell Programming and Scripting
Control two exclusively shared resources(semaphore). The two resources are two files. The producer will write even numbers to one file, and odd numbers to another one. The consumer respectively reads from each file until it gets 5 even numbers and 5 odd numbers.
Can any one help me with the... (0 Replies)
Discussion started by: gokult
0 Replies
8. Programming
If I create a semaphore and then I fork a number of child processes then all the child process use that same semaphore.
Since the process address spaces are different rfom each other then how all the child process are able to access the same semaphore?
I understand that semaphore/mutex is at os... (0 Replies)
Discussion started by: rupeshkp728
0 Replies
9. UNIX for Beginners Questions & Answers
I was asked to add this piece of code to a c program which I will execute through the shell:
for(long i = 0; i < NITER; i++)
{ sem_wait( &sema);
count++;
sem_post( &sema); }
I didn't get it, which is the critical section ? if it's "count++" how would a thread wake up in order to enter it... (1 Reply)
Discussion started by: uniran
1 Replies
LEARN ABOUT SUNOS
getpflags
getpflags(2) getpflags(2)
NAME
getpflags, setpflags - get or set process flags
SYNOPSIS
#include <sys/types.h>
#include <priv.h>
uint_t getpflags(uint_t flag);
int setpflags(uint_t flag, uint_t value);
The getpflags() and setpflags() functions obtain and modify the current per-process flags.
The following values for flag are supported:
PRIV_AWARE This one bit flag takes the value of 0 (unset) or 1 (set). Only if this flag is set is the current process privilege-
aware. A process can attempt to unset this flag but might fail silently if the observed set invariance condition cannot be
met. Setting this flag is always successful. See privileges(5) for a discussion of this flag.
PRIV_DEBUG This one bit flag takes the value of 0 (unset) or 1 (set). Only if this flag is set does the current process have privi-
lege debugging enabled. Processes can set and unset this flag at will.
The getpflags() returns the value associated with a given per-process flag. If the flag argument is invalid, (uint_t)-1 is returned and
errno is set to indicate the error.
Upon successful completion, setpflags() returns 0. Otherwise, -1 is returned and errno is set to indicate the error.
The getpflags() and setpflags() functions will fail if:
EINVAL The value of flag or the value to which the flag is set is out of range.
The setpflags() function will fail if:
EPERM An attempt was made to unset PRIV_AWARE but the observed set invariance condition was not met.
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
|MT-Level |Async-Signal-Safe |
+-----------------------------+-----------------------------+
ppriv(1), attributes(5), privileges(5)
7 Mar 2005 getpflags(2)