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Two processes at the same machine communicaton with each other use TCP. The communicaton flow between them is very heavy.
My question is How the impaction of "processes at the same machine...

1 . How does va_arg implemented by system?

1. use Digital Unix 4.0F
2. as we know, tcpdump can get network package. But does it
peek packates like MSG_PEEK flag in recvmsg() OR does it
get packetes from kernel processed or...

I write a TCP programe .When I read block at some port I get an EINTR . Why The EINTR caused? How Can I Ingore The EINTR

1. pfconfig +promisc +copyall -all
2. tcpdump -mlex -vv tcp port any_port

I have two net-card. one is 172.16.24.99(ENG) ,another is 172.16.25.99(ENG-B). Both masks is 255.255.255.0.
I will monitor data on the tcp port 8055 in ENG, How do I set option of tcpdump command

I use /bin/ksh
As we know that if we export an enviorment in command terminal, then the enviorment can be used in that termial , it can not take effect in other terminals .
How Can I export an...

1 . I use Digital Unix V4.0F
2 . I compile a programe which use a shared library . But when I run it( prog.out) , the shell told me that "Fatal Error : /sbin/loader : unresolved symbol in...

First , thank you for reading the post.

I Use Digital Unix 4.0F .

I get an i-node number of a text file using stat() function . I want to read the file context following the i-node...

I use Digital Unix 4.0F (OSF/1) .I write a simple programe :

#define _POSIX_SOURCE
#include <pthread.h>

void main(void)
{ }

But , the compiler report many errors .
I do not know why the...

I want to write a functionz(work on command line mode) which require user input password , but I do not want the passwd echo in screen , then I should not use scanf() . Which function should I use ?...

How can I broadcast in a lonely Unix machine .
One process can inform other processes in the same machine that something happened .
Do not inform these processes one after another in a loop.You...

Why process leader can not call setsid()

1 . Thank you for reading the post first.
2 . what difference between "terminal" and "console"

How does commnad tail implement ?
Thank you .

example is blow :


#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
...

1 .I found the answer .
2 .First , I write another programe .
#include <stdio.h>
#include <string.h>

int main(void)
{
char *p;

p = (char *) malloc(100);

strcpy(p,...

1 . At first , you should re-compile your prograem with -g option .
2 . run it , if it has produced a core file , you can use dbx(debugger) to find where does the programe coredump.

type the...

1 . Thanks everyone who read the post.

2 . the programe is that :
#include <stdio.h>
#include <string.h>

void do_it(char *p)
{
p = (char *) malloc(100);

(void...

please refer to http://docs3.sun.com:8100/?q=CDE+Use

1 . Thanks everyone who reads the post .
2 . I want to know where can I download POSIX standard ,because I want to migrate my programe from Linux to ohter platform .

thanks

1 . Thanks everyone who read the post first.
2 . I have a log file which size is 143M , I can not use vi open it .I can not use xedit open it too.
How to view it ?
If I want to view...

please refer to http://www.tru64unix.compaq.com/docs/base_doc/DOCUMENTATION/V40D_HTML/AQ0R3FTE/TITLE.HTM chapter 2

or you can type command "uerf" (If you do not know how to use uerf , man uerf...

thanks .