user/forphan.c

1#include "kernel/types.h"2#include "kernel/stat.h"3#include "kernel/fcntl.h"4#include "user/user.h"56// Create an orphaned file and check if test-xv6.py recovers it.78#define BUFSZ 500910char buf[BUFSZ];1112int13main(int argc, char **argv)14{15  int fd = 0;16  char *s = argv[0];17  struct stat st;18  char *ff = "file0";19  20  if ((fd = open(ff, O_CREATE|O_WRONLY)) < 0) {21    printf("%s: open failed\n", s);22    exit(1);23  }24  if(fstat(fd, &st) < 0){25    fprintf(2, "%s: cannot stat %s\n", s, "ff");26    exit(1);27  }28  if (unlink(ff) < 0) {29    printf("%s: unlink failed\n", s);30    exit(1);31  }32  if (open(ff, O_RDONLY) != -1) {33    printf("%s: open successed\n", s);34    exit(1);35  }36  printf("wait for kill and reclaim %d\n", st.ino);37  // sit around until killed38  for(;;) pause(1000);39}40