10 More Discussions You Might Find Interesting
1. AIX
I have to list the files of particular directory using file filter like find -name abc* something and if multiple file exist I also want time of each file up to seconds.
Currently we are getting time up to minutes in AIX is there any way I can get file last modification time up to seconds. (4 Replies)
Discussion started by: Nitesh sahu
4 Replies
2. UNIX for Dummies Questions & Answers
Hi Friends,
I am facing a very strange issue . I type something on putty session of servers of my work(locating in North America) and it appears only after 7 seconds or so. I am located in India. It doesn't happen with my colleagues who are sitting next to me :(.
I use the ssh protocol to connect... (4 Replies)
Discussion started by: kunwar
4 Replies
3. UNIX and Linux Applications
Hi to all,
I am new to Linux. but i am facing issue with my web server in Ubuntu 11.10.
In my webserver i want to restrict maximum users website access (e.g., suppose i want to restrict users to access web to 250 persons in single time). So can you please suggest me to how to do that in... (1 Reply)
Discussion started by: Chintanghanti
1 Replies
4. UNIX for Advanced & Expert Users
Hi Guys,
I am having some issue in one aspect. I am having data like -
00:00
X-1
Y-1
Z-4
A-5
E-6
.
.
.
.
01:00
Z-9
X-1
Z-5
A-8
E-7 (2 Replies)
Discussion started by: aniketdixit
2 Replies
5. Programming
Hi all,
I'm after some help with this small issue which i'm struggling to work out a fix for.
I have a file that contains records that all have a time stamp for each individual record, i need to search the file for a specific time stamp and then search back 10 seconds to see if the number... (2 Replies)
Discussion started by: sp3arsy
2 Replies
6. Shell Programming and Scripting
i have file named aaaa.
The file aaaa was zipped on one particular time.
Need to know the command to find out when the file "aaaa" was actually zipped. (1 Reply)
Discussion started by: expert
1 Replies
7. Shell Programming and Scripting
date1=$(date +"%H:%M:%S")
date2=$(date +"01:00:54")
diff=$date2-$date1
echo $diff
How to get the time difference in seconds. (4 Replies)
Discussion started by: sandy1028
4 Replies
8. Shell Programming and Scripting
Hi All,
Cany any one help me in solving this..
Problem statement: I have a requirement to find the time from which there are no files created in a given directory. For this I am assuming that I need to get the file creation time in seconds, then the current time in seconds using `date +%s`.... (7 Replies)
Discussion started by: chary
7 Replies
9. UNIX for Dummies Questions & Answers
I thought that access time of a file is time when the file was run last time (or I read somewhere that it's time when system lookup the file -> but I'm not sure when it really is)
How is it exactly?
Thank you for help! (11 Replies)
Discussion started by: MartyIX
11 Replies
10. Programming
Hi,
I need to time a certain function in my C/C++ code and I am experiencing some difficulties. I timed it using wallclock time so I know that it takes approximately 500-600 microseconds with
gettimeofday(&start, NULL);
// my function call
gettimeofday(&end, NULL);
answer = (end.tv_sec -... (2 Replies)
Discussion started by: zynnel
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)
