Moderators have had to edit you for code tags so many times you've got negative bits. The formatting on your code is also all ruined because you didn't use code tags. PLEASE USE CODE TAGS. IT'S NOT HARD.
You haven't posted the complete program, either, I'm having to write a large part of it myself to make it work.
Your program, with nIntClientCount=3, gives this output:
Code:
I am CHILD 0
wait pid didn't match
: No child processes
I am CHILD 1
I am CHILD 1
wait pid didn't match
: No child processes
wait pid didn't match
: No child processes
I am CHILD 2
I am CHILD 2
wait pid didn't match
: No child processes
wait pid didn't match
: No child processes
parent exited..
parent exited..
parent exited..
parent exited..
I am CHILD 2
wait pid didn't match
: No child processes
parent exited..
I am CHILD 2
parent exited..
wait pid didn't match
: No child processes
parent exited..
parent exited..
Hey all. I recently ported a multithreaded program from WinNT to LINUX using pthreads. Everything works fine, except that it turns out the drivers for the hardware I'm working with aren't thread safe. So, now I have to find a way to make this multi-process instead of multi-threaded.
I just... (1 Reply)
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):
clear
echo "REAL... (3 Replies)
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)
I have a parent that is passing data to child A and then child A has to process it and pass to child B. I am able to pass the data to child A but am not able to pass it to child B. Child B seems to only be receiving the last data instead of the whole data.
I saw one example in a book but it uses... (1 Reply)
hai,
i am doing my masters degree in computers.please any one tell me about
fork(),semaphores,mutex,messaging queues,messaging using pipes ,and msgget(),msgrecv() funtions
in ipc programming .
i have exam on that i have a book but in that they not given clearly.
hope u will
... (2 Replies)
Hi! I'm trying to write this program: in my intentions it should get a message and send it to a second process (pid_upost), then to a third process (pid1, pid2, pid3, depending on the choice made when a new message is inserted). This program should write the message in a file (message1, message2 or... (1 Reply)
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)
I am trying to ping through a list of devices in parallel.
When the code below is executed, I enter a infinite loop.
I want to used the number of lines in the file as my boundry.
I am a perl rookie and just cant see whats wrong.
would appreciate help ...
use Net::Ping;
#
$filename... (0 Replies)
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
It will then prompt "Search for:"
For example, if I searched for Products called Instant... (0 Replies)
Hi Experts,
Need your help for checking te interprocess communications settings on HP-UX box.
Using ipcs command I am able to view Message queue,semapohores etc, but from that output I m not able to understand how to determine if there is any issue with ipc settings and how to resolve that? (1 Reply)
Discussion started by: sai_2507
1 Replies
LEARN ABOUT PHP
pcntl_waitpid
PCNTL_WAITPID(3) 1 PCNTL_WAITPID(3)pcntl_waitpid - Waits on or returns the status of a forked childSYNOPSIS
int pcntl_waitpid (int $pid, int &$status, [int $options])
DESCRIPTION
Suspends execution of the current process until a child as specified by the $pid argument has exited, or until a signal is delivered whose
action is to terminate the current process or to call a signal handling function.
If a child as requested by $pid has already exited by the time of the call (a so-called "zombie" process), the function returns immedi-
ately. Any system resources used by the child are freed. Please see your system's waitpid(2) man page for specific details as to how wait-
pid works on your system.
PARAMETERS
o $pid
- The value of $pid can be one of the following:
possible values for $pid
+-----+---------------------------------------------------+
| | |
|< -1 | |
| | |
| | wait for any child process whose process group |
| | ID is equal to the absolute value of $pid. |
| | |
| | |
| -1 | |
| | |
| | wait for any child process; this is the same be- |
| | haviour that the wait function exhibits. |
| | |
| | |
| 0 | |
| | |
| | wait for any child process whose process group |
| | ID is equal to that of the calling process. |
| | |
| | |
|> 0 | |
| | |
| | wait for the child whose process ID is equal to |
| | the value of $pid. |
| | |
+-----+---------------------------------------------------+
Note
Specifying -1 as the $pid is equivalent to the functionality pcntl_wait(3) provides (minus $options).
o $status
-pcntl_waitpid(3) will store status information in the $status parameter which can be evaluated using the following functions:
pcntl_wifexited(3), pcntl_wifstopped(3), pcntl_wifsignaled(3), pcntl_wexitstatus(3), pcntl_wtermsig(3) and pcntl_wstopsig(3).
o $options
- The value of $options is the value of zero or more of the following two global constants OR'ed together:
possible values for $options
+----------+---------------------------------------------------+
| | |
| WNOHANG | |
| | |
| | return immediately if no child has exited. |
| | |
| | |
|WUNTRACED | |
| | |
| | return for children which are stopped, and whose |
| | status has not been reported. |
| | |
+----------+---------------------------------------------------+
RETURN VALUES pcntl_waitpid(3) returns the process ID of the child which exited, -1 on error or zero if WNOHANG was used and no child was available
SEE ALSO pcntl_fork(3), pcntl_signal(3), pcntl_wifexited(3), pcntl_wifstopped(3), pcntl_wifsignaled(3), pcntl_wexitstatus(3), pcntl_wtermsig(3),
pcntl_wstopsig(3).
PHP Documentation Group PCNTL_WAITPID(3)