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865天前#include <io.h> |
#include <fcntl.h> |
#include <sys\stat.h> |
#include <process.h> |
#include <share.h> |
#include <stdio.h> |
int main(void) |
{ |
int handle, status; |
long length; |
/* Must have DOS Share.exe loaded for */ |
/* file locking to function properly */ |
handle = sopen("c:\\autoexec.bat", |
O_RDONLY,SH_DENYNO,S_IREAD); |
if (handle < 0) |
{ |
printf("sopen failed\n"); |
exit(1); |
} |
length = filelength(handle); |
status = lock(handle,0L,length/2); |
if (status == 0) |
printf("lock succeeded\n"); |
else |
printf("lock failed\n"); |
status = unlock(handle,0L,length/2); |
if (status == 0) |
printf("unlock succeeded\n"); |
else |
printf("unlock failed\n"); |
close(handle); |
return 0; |
} |
