• Ulrich Drepper's avatar
    flag parameters: inotify_init · 4006553b
    Ulrich Drepper authored
    This patch introduces the new syscall inotify_init1 (note: the 1 stands for
    the one parameter the syscall takes, as opposed to no parameter before).  The
    values accepted for this parameter are function-specific and defined in the
    inotify.h header.  Here the values must match the O_* flags, though.  In this
    patch CLOEXEC support is introduced.
    
    The following test must be adjusted for architectures other than x86 and
    x86-64 and in case the syscall numbers changed.
    
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    #include <fcntl.h>
    #include <stdio.h>
    #include <unistd.h>
    #include <sys/syscall.h>
    
    #ifndef __NR_inotify_init1
    # ifdef __x86_64__
    #  define __NR_inotify_init1 294
    # elif defined __i386__
    #  define __NR_inotify_init1 332
    # else
    #  error "need __NR_inotify_init1"
    # endif
    #endif
    
    #define IN_CLOEXEC O_CLOEXEC
    
    int
    main (void)
    {
      int fd;
      fd = syscall (__NR_inotify_init1, 0);
      if (fd == -1)
        {
          puts ("inotify_init1(0) failed");
          return 1;
        }
      int coe = fcntl (fd, F_GETFD);
      if (coe == -1)
        {
          puts ("fcntl failed");
          return 1;
        }
      if (coe & FD_CLOEXEC)
        {
          puts ("inotify_init1(0) set close-on-exit");
          return 1;
        }
      close (fd);
    
      fd = syscall (__NR_inotify_init1, IN_CLOEXEC);
      if (fd == -1)
        {
          puts ("inotify_init1(IN_CLOEXEC) failed");
          return 1;
        }
      coe = fcntl (fd, F_GETFD);
      if (coe == -1)
        {
          puts ("fcntl failed");
          return 1;
        }
      if ((coe & FD_CLOEXEC) == 0)
        {
          puts ("inotify_init1(O_CLOEXEC) does not set close-on-exit");
          return 1;
        }
      close (fd);
    
      puts ("OK");
    
      return 0;
    }
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    
    [akpm@linux-foundation.org: add sys_ni stub]
    Signed-off-by: default avatarUlrich Drepper <drepper@redhat.com>
    Acked-by: default avatarDavide Libenzi <davidel@xmailserver.org>
    Cc: Michael Kerrisk <mtk.manpages@googlemail.com>
    Cc: <linux-arch@vger.kernel.org>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    4006553b
unistd_64.h 21.5 KB