Attachment 153164 Details for Bug 197695 – test case

test case

bug_197695.c (text/x-csrc), 1.95 KB, created by Niall Douglas on 2015-02-19 04:57:48 UTC

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Creator: Niall Douglas

Created: 2015-02-19 04:57:48 UTC

Size: 1.95 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <unistd.h>
>#include <fcntl.h>
>#include <sys/types.h>
>#include <sys/sysctl.h>
>#include <sys/user.h>
>#include <sys/stat.h>
>
>static void print_fd_table()
>{
>  size_t len;
>  int mib[4]={CTL_KERN, KERN_PROC, KERN_PROC_FILEDESC, getpid()};
>  sysctl(mib, 4, NULL, &len, NULL, 0);
>  len*=2;
>  char *buffer=(char *) calloc(1, len);
>  sysctl(mib, 4, buffer, &len, NULL, 0);
>  for(char *p=buffer; p<buffer+len;)
>  {
>    struct kinfo_file *kif=(struct kinfo_file *) p;
>    printf("%d %d %s\n", kif->kf_type, kif->kf_fd, kif->kf_path);
>    p+=kif->kf_structsize;
>  }
>  free(buffer);
>}
>
>int main(void)
>{
>  const char buf[]="Niall";
>  char cwd[PATH_MAX], path[PATH_MAX], path2[PATH_MAX];
>  int h[4];
>  getcwd(cwd, sizeof(cwd));
>  for(size_t n=0; n<sizeof(h)/sizeof(h[0]); n++)
>  {
>    if(n&1)
>    {
>      sprintf(path, "dir%zu", n);
>      mkdir(path, 0x1f8);
>      h[n]=open(path, O_RDONLY);
>    }
>    else
>    {
>      sprintf(path, "file%zu", n);
>      // Handles which create don't get a path :(
>      h[n]=open(path, O_CREAT|O_RDWR, 0x1b0);
>      close(h[n]);
>      h[n]=open(path, O_RDONLY);
>    }
>  }
>  printf("\nfd table after file opens:\n");
>  print_fd_table();
>  for(size_t n=0; n<sizeof(h)/sizeof(h[0]); n++)
>  {
>    if(n&1)
>      sprintf(path, "dir%zu", n);
>    else
>      sprintf(path, "file%zu", n);
>    sprintf(path2, "boo%zu", n);
>    if(-1==rename(path, path2)) abort();
>    printf("\nfd table after file rename of fd %d (none should be null!):\n", h[n]);
>    print_fd_table();
>  }
>  for(size_t n=0; n<sizeof(h)/sizeof(h[0]); n++)
>  {
>    sprintf(path, "boo%zu", n);
>    if(n&1)
>    {
>      if(-1==rmdir(path)) abort();
>    }
>    else
>    {
>      if(-1==unlink(path)) abort();
>    }
>    printf("\nfd table after file unlink of fd %d:\n", h[n]);
>    print_fd_table();
>  }
>  for(size_t n=0; n<sizeof(h)/sizeof(h[0]); n++)
>  {
>    close(h[n]);
>    printf("\nfd table after file close:\n");
>    print_fd_table();
>  }
>  return 0;
>}

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Attachments on bug 197695: 153164 | 153165