Unix thread sharing Create process Open file resource (1)

Execution Environment: Linux ubuntu 4.4.0-31-generic #50-ubuntu SMP Wed Jul 00:07:12 UTC x86_64 x86_64 x86_64 gnu/linux

1. Test code: A.C

1#include <fcntl.h>2#include <unistd.h>3#include <stdio.h>4#include <pthread.h>5#include <string.h>6 7 pthread_t Ntid;8 9 void* THR_FN (void*Arg)Ten { One    int* fp = (int*) arg; A    Char* str ="Hello the world!\n"; -  -    intLen = Write (*Fp,str,strlen (str)); the    if(len) -    { -printf"Thread Write a string to the file by the descriptor the CreateProcess created!\n"); -    } +  -Close (*FP); +    return((void*)0); A } at  - intMainvoid) - { -     interr; -     intFD; -  inFD = open ("Log.txt", o_creat|o_wronly); -     if(-1==FD) to     { +printf"Failed to open file!\n"); -     } the  *Err = Pthread_create (&ntid,NULL,thr_fn,&FD); $     if(Err! =0)Panax Notoginseng     { -printf"can ' t create thread, errno =%d\n", err);  the     } +Sleep3); A     return 0; the}

2. If the system does not have a corresponding Pthread library, execute:

1 sudo apt-get install glibc-doc

2 sudo apt-get install Manpages-posix-dev

Compile run:

1 gcc a.c-lpthread

Unix thread sharing Create process Open file resource (1)