04-05-2017
I don't get this post... You say "Solaris" but the uname output says "Linux". And the question is posted in "Shell Programming and Scripting". Something is a little off here...
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
1. If I use an software application(which connects to the database in the server) in my local pc, how many PID should be registered? Would there be PID for the session and another PID for socket connection?
2. I noticed (through netstat) that when I logged in using the my software application,... (1 Reply)
Discussion started by: pcx26
1 Replies
2. UNIX for Dummies Questions & Answers
Hi All,
Since server is located at remote place so how to identify which user rebooted the server. Is there any way to identify the user.
Thanks in advance,
Reg,
Bache Gowda (1 Reply)
Discussion started by: bache_gowda
1 Replies
3. UNIX for Dummies Questions & Answers
Hi all,
I am trying to connect the open socket and its owner PID on my Solaris9 system. But it seems not very easy.
As netstat is not as powerful as it is on Linux platform, without the "-program" option, and "lsof -i <UDP|TCP>@<hostIP>" won't show the one i want although it lists some... (1 Reply)
Discussion started by: sleepy_11
1 Replies
4. Programming
Good evening everyone! :)
I'm doing a small client / server application for sharing files in C, and I am trying to implement the following:
The client of my application sends to the address 255.255.255.255 a message requesting a particular file.In the network there is only one server,... (1 Reply)
Discussion started by: esmeco
1 Replies
5. Linux
Hi
any idea on why I am getting this?
/sbin/mdadm --detail /dev/md0
mdadm: md device /dev/md0 does not appear to be active.
thanks. (2 Replies)
Discussion started by: melanie_pfefer
2 Replies
6. What is on Your Mind?
A few years ago, Dell announced they were selling PCs with Linux (Ubuntu) preinstalled or with no OS installed. It was about time! So a couple years ago I bought the Inspiron 1525n laptop that I'm typing this on with Ubuntu preinstalled. Yea! (Though I immediately wiped Ubuntu and installed... (7 Replies)
Discussion started by: KenJackson
7 Replies
7. UNIX for Advanced & Expert Users
Good Evening,
2 years ago, I set up an Ubuntu file-server for a friend, who is a photograph amateur. Basically, the server offers a software RAID-5 that can be accessed remotely from a MAC. Unfortunately, I didn't labeled the hard drives (i.e. which physical drive corresponds to the /dev/sdX... (2 Replies)
Discussion started by: Loic Domaigne
2 Replies
8. IP Networking
Hello,
Our software is using a TCP socket (AF_INET, SOCK_STREAM) to communicate with an Ethernet device. When we send a message, the message object writes itself in full onto the socket's stream buffer before the software invokes send() from socket.h.
I'm still researching, but have 2... (1 Reply)
Discussion started by: bix_20002000
1 Replies
9. Shell Programming and Scripting
We are using linux server. We have below script running on the crontab and it send the alert if the cpu usage is above 90%.
My question is, the below script tells the CPU usage for one CPU or all CPU in the server?
sar 1 1 | sed '$!d' | awk '{printf("%d", $8)}' > $SAR_LOG
Please let me... (4 Replies)
Discussion started by: govindts
4 Replies
10. UNIX for Dummies Questions & Answers
need script(shell or python) for killing pid in linux (2 Replies)
Discussion started by: roshan9995
2 Replies
postwait(2) System Calls Manual postwait(2)
NAME
postwait: pw_getukid(), pw_wait(), pw_post(), pw_postv(), pw_getvmax() - lightweight synchronization mechanism
SYNOPSIS
DESCRIPTION
Postwait is a fast, lightweight sleep/wakeup mechanism that can be used for synchronization by cooperating kernel threads within a single
process or between separate processes.
A thread calls to block. It resumes execution when it is posted by another thread, the call expires, or is signaled. If one or more posts
are already pending, returns immediately.
Threads using postwait are identified by their ukid. A thread retrieves its ukid by calling It shares this ukid with anyone it chooses by
any means it considers appropriate (for example, shared memory).
is called with a timeout ts. If ts is NULL, the thread will not timeout. It will remain blocked until posted or a signal wakes it up.
If ts points to a zero-valued timespec, will return immediately with a value (and indicating whether or not it was posted.
If ts points to a timespec whose value is greater than zero, the thread will block for that amount of time unless it is posted or inter-
rupted by a signal, in which case the timespec pointed to by ts is updated with the remaining time. The return value and are set to indi-
cate the reason the call returned.
is used to post many threads with a single call. It posts to all threads in the targets array. An value for each target is returned in
the errors array. (0 indicates success.) If the errors pointer is zero, no target-specific errors are copied out.
There is a maximum number of threads that can be posted with a single call. This value is returned by
Posts sent to a kernel thread that already has a post pending against it are discarded.
RETURN VALUE
returns 0 if it succeeds, -1 otherwise.
returns 0 if posted, -1 otherwise.
returns 0 if the post succeeds, -1 otherwise.
returns 0 if every post succeeds, -1 otherwise.
returns the maximum number of kernel threads that can be posted with a single call to
ERRORS
sets to one of the following values if it fails:
ukid points to an illegal address. The reliable detection of this error is implementation dependent.
sets to one of the following values if it fails:
was called with a timeout of 0 but the caller has no post(s) pending.
was called with a timeout that expired.
ts points to an illegal address. The reliable detection of this error is implementation dependent.
was interrupted
by a signal.
The timespec pointed to by ts is invalid.
sets to one of the following values if it fails:
The ukid refers to a non-existent kernel thread.
sets to one of the following values if it fails:
targets points to an illegal address. The reliable detection of this error is implementation dependent.
errors points to an illegal address. The reliable detection of this error is implementation dependent.
count is less than 0.
count exceeds the maximum value (as returned by
A ukid refers to a non-existent kernel thread.
postwait(2)