[TUHS] v7 K&R C

[Jon Steinhart]

Larry McVoy writes:
> What Clem said, that is precisely how I feel.  I'd be fully for them if they
> fully type checked but without that, yeah, cpp is fine, enums are just a
> distraction.

Enums are implemented badly, but it's possible to do even worse.  This is from
linux /usr/include/sys/mount.h - can anyone explain the point of it to me?

enum
{
  MS_RDONLY = 1,		/* Mount read-only.  */
#define MS_RDONLY	MS_RDONLY
  MS_NOSUID = 2,		/* Ignore suid and sgid bits.  */
#define MS_NOSUID	MS_NOSUID
  MS_NODEV = 4,			/* Disallow access to device special files.  */
#define MS_NODEV	MS_NODEV
  MS_NOEXEC = 8,		/* Disallow program execution.  */
#define MS_NOEXEC	MS_NOEXEC
  MS_SYNCHRONOUS = 16,		/* Writes are synced at once.  */
#define MS_SYNCHRONOUS	MS_SYNCHRONOUS
  MS_REMOUNT = 32,		/* Alter flags of a mounted FS.  */
#define MS_REMOUNT	MS_REMOUNT
  MS_MANDLOCK = 64,		/* Allow mandatory locks on an FS.  */
#define MS_MANDLOCK	MS_MANDLOCK
  MS_DIRSYNC = 128,		/* Directory modifications are synchronous.  */
#define MS_DIRSYNC	MS_DIRSYNC
  MS_NOATIME = 1024,		/* Do not update access times.  */
#define MS_NOATIME	MS_NOATIME
  MS_NODIRATIME = 2048,		/* Do not update directory access times.  */
#define MS_NODIRATIME	MS_NODIRATIME
  MS_BIND = 4096,		/* Bind directory at different place.  */
#define MS_BIND		MS_BIND
  MS_MOVE = 8192,
#define MS_MOVE		MS_MOVE
  MS_REC = 16384,
#define MS_REC		MS_REC
  MS_SILENT = 32768,
#define MS_SILENT	MS_SILENT
  MS_POSIXACL = 1 << 16,	/* VFS does not apply the umask.  */
#define MS_POSIXACL	MS_POSIXACL
  MS_UNBINDABLE = 1 << 17,	/* Change to unbindable.  */
#define MS_UNBINDABLE	MS_UNBINDABLE
  MS_PRIVATE = 1 << 18,		/* Change to private.  */
#define MS_PRIVATE	MS_PRIVATE
  MS_SLAVE = 1 << 19,		/* Change to slave.  */
#define MS_SLAVE	MS_SLAVE
  MS_SHARED = 1 << 20,		/* Change to shared.  */
#define MS_SHARED	MS_SHARED
  MS_RELATIME = 1 << 21,	/* Update atime relative to mtime/ctime.  */
#define MS_RELATIME	MS_RELATIME
  MS_KERNMOUNT = 1 << 22,	/* This is a kern_mount call.  */
#define MS_KERNMOUNT	MS_KERNMOUNT
  MS_I_VERSION =  1 << 23,	/* Update inode I_version field.  */
#define MS_I_VERSION	MS_I_VERSION
  MS_STRICTATIME = 1 << 24,	/* Always perform atime updates.  */
#define MS_STRICTATIME	MS_STRICTATIME
  MS_LAZYTIME = 1 << 25,	/* Update the on-disk [acm]times lazily.  */
#define MS_LAZYTIME	MS_LAZYTIME
  MS_ACTIVE = 1 << 30,
#define MS_ACTIVE	MS_ACTIVE
  MS_NOUSER = 1 << 31
#define MS_NOUSER	MS_NOUSER
};