What OS and version are you on? Cygwin? What compiler version are you using and how are you compiling this program?
i use gcc 4.6.1 under ubuntu 11.10
Quote:
Originally Posted by Corona688
When something expects a "int *", you're not supposed to declare an "int *". That creates an empty pointer, pointing to nowhere, which will probably cause your program to crash when used!
What they want when they demand an "int *" is pointer to an integer, the address of an integer, so they can modify that integer.
hi there,
i had some trivial questions about this program here. i am kinda confused with these, hope you can help me to understand here. :)
#include<stdio.h>
#include<sys/wait.h>
#include<sys/types.h>
#include<unistd.h>
int main(void)
{
int... (2 Replies)
Hi,
Ho do I differentiate system call from library call?
for example if I am using chmod , how do I find out if it is a system call or library call?
Thanks
Muru (2 Replies)
Did not use 'wait' yet.
How I understand by now the wait works only for child processes, started background.
Is there any other way to watch completion of any, not related process (at least, a process, owned by the same user?)
I need to start a background process, witch will be waiting... (2 Replies)
Hi
I'm studing the system call. I've written a small program that return the time spent in doing some operations. Now I'd like to write one that return the time spent in user mode of a process.
I'm reading that i should use the tms struct:
clock_t times(struct tms *buf);
struct tms {... (2 Replies)
Hi,
I googled a bit, but could not find the answer to my problem.
But I am sure it is a common issue.
I have this code:
#!/bin/perl -w #-d
use strict;
sub remsh_test()
{
my $host = $_;
printf "\n----\n\n";
printf "remsh to $host with system call\n";
my $result = system... (3 Replies)
hi everyone
i wrote a system call and compiled the kernel succesfully...
my system call is in a file in the kernel folder named my_syscall1.c (kernel/my_syscall1.c)
the header file for this system call i added it in the folder include like this include/my_syscall1/my_syscall1.h
my problem is... (2 Replies)
Trying to figure out a load issue with a webserver. I have traced a php script and noticed the following
connect(4, {sa_family=AF_INET, sin_port=htons(3306), sin_addr=inet_addr("XX.XX.XX.XX")}, 16) = -1 EINPROGRESS (Operation now in progress) <0.000035>
poll(, 1, 2000) = 1 () <0.000120>... (5 Replies)
Hi
I have two scripts script1.sh and script2.sh(say this script is a long running).
I want to call script2.sh inside and script1.sh,but when i call script2.sh i dont want to wait for script2 to complete and want this to run in back ground and go on next commands in script 1.sh and finally at the... (2 Replies)
Discussion started by: lijjumathew
2 Replies
LEARN ABOUT LINUX
vop_fsync
VOP_FSYNC(9) BSD Kernel Developer's Manual VOP_FSYNC(9)NAME
VOP_FSYNC -- flush file system buffers for a file
SYNOPSIS
#include <sys/param.h>
#include <sys/vnode.h>
int
VOP_FSYNC(struct vnode *vp, int waitfor, struct thread *td);
DESCRIPTION
This call flushes any dirty file system buffers for the file. It is used to implement the sync(2) and fsync(2) system calls.
Its arguments are:
vp The vnode of the file.
waitfor Whether the function should wait for I/O to complete. Possible values are:
MNT_WAIT Synchronously wait for I/O to complete.
MNT_NOWAIT Start all I/O, but do not wait for it.
MNT_LAZY Push data not written by file system syncer.
td The calling thread.
The argument waitfor is either MNT_WAIT or MNT_NOWAIT and specifies whether or not the function should wait for the writes to finish before
returning.
LOCKS
The file should be locked on entry.
RETURN VALUES
Zero is returned if the call is successful, otherwise an appropriate error code is returned.
ERRORS
[ENOSPC] The file system is full.
[EDQUOT] Quota exceeded.
SEE ALSO vnode(9)AUTHORS
This manual page was written by Doug Rabson.
BSD July 24, 1996 BSD
12-09-2011
