Pintos: pintos/src/tests/userprog/open-twice.c Source File

00001 /* Tries to open the same file twice,
00002    which must succeed and must return a different file descriptor
00003    in each case. */
00004 
00005 #include <syscall.h>
00006 #include "tests/lib.h"
00007 #include "tests/main.h"
00008 
00009 void
00010 test_main (void) 
00011 {
00012   int h1 = open ("sample.txt");
00013   int h2 = open ("sample.txt");  
00014 
00015   CHECK ((h1 = open ("sample.txt")) > 1, "open \"sample.txt\" once");
00016   CHECK ((h2 = open ("sample.txt")) > 1, "open \"sample.txt\" again");
00017   if (h1 == h2)
00018     fail ("open() returned %d both times", h1);
00019 }