Installed-header hygiene (BZ#20366): obsolete BSD u_* types.

The types u_char, u_short, u_int, u_long, ushort, uint, ulong, u_int8_t,
u_int16_t, u_int32_t, u_int64_t, quad_t, and u_quad_t are BSDisms that
have never been standardized.  While glibc should continue to *provide*
these types for compatibility's sake, its public headers should not
use them.

The meat of this change was mechanically generated by the following
shell command:

    perl -pi~ -e '
        s/\b(__)?u_char\b/unsigned char/g;
        s/\b(__)?u_?short\b/unsigned short/g;
        s/\b(__)?u_?int\b/unsigned int/g;
        s/\b(__)?u_?long\b/unsigned long/g;
        s/\b(__)?u_int8_t\b/uint8_t/g;
        s/\b(__)?u_int16_t\b/uint16_t/g;
        s/\b(__)?u_int32_t\b/uint32_t/g;
        s/\b(__)?u_int64_t\b/uint64_t/g;
        s/\b(__)?u_quad_t\b/uint64_t/g;
        s/\b(__)?quad_t\b/uint64_t/g;
    ' $(grep -lE -e '\<((__)?(quad_t|u(short|int|long|_(char|short|int([0-9]+_t)?|long|quad_t))))\>' \
        $(grep -LE '\<(_(SYS|BITS)_TYPES_H|rpc/(rpc|rpc_msg|types|xdr)\.h)\>' \
          $(find . \( -false $(sed 's/^/-o -name /' all-installed-headers) \
                   \) -printf '%P\n' | sort -u)))

where 'all-installed-headers' was a list of the basenames of all installed
header files, manually extracted from the Makefiles.  Non-installed
wrapper headers in include/ are also adjusted, for consistency.
I then manually fixed up indentation and line-wrapping.

sys/types.h and bits/types.h are excluded because they must continue
to define the u_* types (under __USE_MISC) for compatibility with
applications.  They do not use these types themselves.

All headers that (transitively) include rpc/types.h are also excluded,
for three reasons.  First, the u_* types are defined by rpc/types.h,
unconditionally (not just under __USE_MISC) so they are logically part
of the SunRPC API.  Second, many of those headers appear to be
machine-generated.  Third, it's my understanding that we are getting
rid of as much of SunRPC as possible in the near future.

(The one file under sunrpc/ that's touched, sunrpc/rpc/rpc_des.h, does
*not* include rpc/types.h.  This may itself be a bug.)

After changing from u_intNN_t to uintNN_t, a number of headers now
need to include stdint.h to pick up those types.  It might be more
hygenic, namespace-wise, to use __uintNN_t instead, but none of these
headers are bound by ISO or POSIX to do so, and it's unlikely that
anyone using them will be bothered.  (The two files that were using
__-prefixed versions of the u_types, sysdeps/mach/hurd/net/route.h and
sysdeps/unix/sysv/linux/net/route.h, both already also contained uses of
the unprefixed versions.)

Some of these files directly included features.h and/or sys/cdefs.h,
which I removed, as the style generally seems to be to let sys/types.h
do that for us.  (This does not change the set of definitions exposed
by any header; sys/types.h unconditionally includes both features.h
and sys/cdefs.h.)

One file included asm/types.h unnecessarily.

	* bits/in.h, gmon/sys/gmon.h, inet/netinet/igmp.h
	* inet/protocols/routed.h, inet/protocols/talkd.h
	* inet/protocols/timed.h, io/fts.h, nptl_db/thread_db.h
	* resolv/arpa/nameser.h, resolv/resolv.h, sunrpc/rpc/rpc_des.h
	* sysdeps/generic/netinet/if_ether.h
	* sysdeps/generic/netinet/in_systm.h
	* sysdeps/generic/netinet/ip.h, sysdeps/generic/netinet/tcp.h
	* sysdeps/gnu/netinet/ip_icmp.h, sysdeps/gnu/netinet/tcp.h
	* sysdeps/gnu/netinet/udp.h, sysdeps/mach/hurd/net/ethernet.h
	* sysdeps/mach/hurd/net/if_arp.h
	* sysdeps/mach/hurd/net/if_ppp.h
	* sysdeps/mach/hurd/net/route.h, sysdeps/mach/sys/reboot.h
	* sysdeps/unix/sysv/linux/bits/in.h
	* sysdeps/unix/sysv/linux/net/ethernet.h
	* sysdeps/unix/sysv/linux/net/if_arp.h
	* sysdeps/unix/sysv/linux/net/if_ppp.h
	* sysdeps/unix/sysv/linux/net/if_shaper.h
	* sysdeps/unix/sysv/linux/net/route.h
	* sysdeps/unix/sysv/linux/netinet/if_ether.h
	* sysdeps/unix/sysv/linux/netinet/if_fddi.h
	* sysdeps/unix/sysv/linux/netinet/if_tr.h
	* sysdeps/unix/sysv/linux/netipx/ipx.h
	* sysdeps/unix/sysv/linux/sys/acct.h
	* include/arpa/nameser.h, include/resolv.h:
	Change all uses of u_char to unsigned char,
	u_short and ushort to unsigned short, u_int and uint to unsigned int,
	u_long and ulong to unsigned long, u_int8_t to uint8_t,
        u_int16_t to uint16_t, u_int32_t to uint32_t, quad_t to int64_t,
	and u_int64_t and u_quad_t to uint64_t.

	* mach/sys/reboot.h: Remove two casts of integer literals
	to the types they already have.

	* bits/in.h: Correct error in description of IP_MULTICAST_LOOP.
	* sysdeps/unix/sysv/linux/bits/in.h: Likewise.
	* sysdeps/unix/sysv/linux/netinet/if_ether.h: Change a comment
	from referring to 'unsigned char' to 'uint8_t' for consistency with
	the macro definition below.

	* gmon/sys/gmon.h, inet/netinet/igmp.h, inet/protocols/talkd.h
	* io/fts.h, resolv/arpa/nameser.h, resolv/resolv.h
	* sunrpc/rpc/rpc_des.h, sysdeps/generic/netinet/ip.h
	* sysdeps/gnu/netinet/tcp.h, sysdeps/gnu/netinet/udp.h
	* sysdeps/mach/hurd/net/if_ppp.h, sysdeps/unix/sysv/linux/net/if_ppp.h
	* sysdeps/unix/sysv/linux/sys/acct.h
	* include/arpa/nameser.h, include/resolv.h:
	Fix indentation disrupted by mechanical edits.

	* inet/protocols/talkd.h, resolv/arpa/nameser.h
	* sysdeps/generic/netinet/in_systm.h
	* sysdeps/gnu/netinet/ip_icmp.h, sysdeps/gnu/netinet/tcp.h
	* sysdeps/gnu/netinet/udp.h
	* sysdeps/unix/sysv/linux/net/ethernet.h
	* sysdeps/unix/sysv/linux/net/if_arp.h
	* sysdeps/unix/sysv/linux/net/if_ppp.h
	* sysdeps/unix/sysv/linux/net/if_shaper.h
	* sysdeps/unix/sysv/linux/netinet/if_fddi.h
	* sysdeps/unix/sysv/linux/netinet/if_tr.h
	* sysdeps/unix/sysv/linux/netipx/ipx.h
	* sysdeps/unix/sysv/linux/sys/acct.h
	Include stdint.h for uintNN_t definitions.
	Don't include sys/cdefs.h, features.h, or asm/types.h directly.

2 files changed, 16 insertions, 12 deletions

diff --git a/include/arpa/nameser.h b/include/arpa/nameser.h
index 57f7457848..ce6f0238ed 100644
--- a/include/arpa/nameser.h
+++ b/include/arpa/nameser.h
@@ -47,8 +47,8 @@ extern const struct _ns_flagdata _ns_flagdata[] attribute_hidden;
 
 #endif
 
-extern u_int		__ns_get16 (const u_char *) __THROW;
-extern u_long		__ns_get32 (const u_char *) __THROW;
+extern unsigned int	__ns_get16 (const unsigned char *) __THROW;
+extern unsigned long	__ns_get32 (const unsigned char *) __THROW;
 
 #define ns_msg_getflag(handle, flag) \
   (((handle)._flags & _ns_flagdata[flag].mask) >> _ns_flagdata[flag].shift)
diff --git a/include/resolv.h b/include/resolv.h
index d7c98dc807..52ac218666 100644
--- a/include/resolv.h
+++ b/include/resolv.h
@@ -29,14 +29,14 @@ extern struct hostent *_gethtent (void);
 extern struct hostent *_gethtbyname (const char *__name);
 extern struct hostent *_gethtbyname2 (const char *__name, int __af);
 struct hostent *_gethtbyaddr (const char *addr, size_t __len, int __af);
-extern u_int32_t _getlong (const u_char *__src);
-extern u_int16_t _getshort (const u_char *__src);
-extern void res_pquery (const res_state __statp, const u_char *__msg,
+extern uint32_t _getlong (const unsigned char *__src);
+extern uint16_t _getshort (const unsigned char *__src);
+extern void res_pquery (const res_state __statp, const unsigned char *__msg,
 			int __len, FILE *__file);
 extern int res_ourserver_p (const res_state __statp,
 			    const struct sockaddr_in6 *__inp);
 extern void __res_iclose (res_state statp, bool free_addr);
-extern int __res_nopt(res_state statp, int n0, u_char *buf, int buflen,
+extern int __res_nopt(res_state statp, int n0, unsigned char *buf, int buflen,
 		      int anslen);
 libc_hidden_proto (__res_ninit)
 libc_hidden_proto (__res_maybe_init)
@@ -45,12 +45,16 @@ libc_hidden_proto (__res_iclose)
 libc_hidden_proto (__res_randomid)
 libc_hidden_proto (__res_state)
 
-int __libc_res_nquery (res_state, const char *, int, int, u_char *, int,
-		       u_char **, u_char **, int *, int *, int *);
-int __libc_res_nsearch (res_state, const char *, int, int, u_char *, int,
-			u_char **, u_char **, int *, int *, int *);
-int __libc_res_nsend (res_state, const u_char *, int, const u_char *, int,
-		      u_char *, int, u_char **, u_char **, int *, int *, int *)
+int __libc_res_nquery (res_state, const char *, int, int,
+		       unsigned char *, int, unsigned char **,
+		       unsigned char **, int *, int *, int *);
+int __libc_res_nsearch (res_state, const char *, int, int,
+			unsigned char *, int, unsigned char **,
+			unsigned char **, int *, int *, int *);
+int __libc_res_nsend (res_state, const unsigned char *, int,
+		      const unsigned char *, int, unsigned char *,
+		      int, unsigned char **, unsigned char **,
+		      int *, int *, int *)
   attribute_hidden;
 
 libresolv_hidden_proto (_sethtent)