unlock

函数名: unlock

功 能: 解除文件共享锁

用 法: int unlock(int handle, long offset, long length);

程序例:

#include

#include

#include

#include

#include

#include

int main(void)

{

int handle, status;

long length;

handle = sopen("c:\autoexec.bat",O_RDONLY,SH_DENYNO,S_IREAD);

if (handle < 0)

{

printf("sopen failed

");

exit(1);

}

length = filelength(handle);

status = lock(handle,0L,length/2);

if (status == 0)

printf("lock succeeded

");

else

printf("lock failed

");

status = unlock(handle,0L,length/2);

if (status == 0)

printf("unlock succeeded

");

else

printf("unlock failed

");

close(handle);

return 0;

}