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authorZack Weinberg <zackw@panix.com>2016-07-13 15:20:29 -0400
committerZack Weinberg <zackw@panix.com>2016-09-23 08:43:56 -0400
commitf2bea4da2e65b5d91a23a01fb2062bcec33974aa (patch)
tree466d8cc7eb9f7baa3a54a3aed84c12264d40bceb /socket
parent11160cb76f56e0a711686e34881a4eaf1ad2fa0e (diff)
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Installed-header hygiene (BZ#20366): conditionally defined structures.
Several network-related structures are defined conditionally under __USE_MISC, but unconditionally used by other headers. The path of least resistance is usually to condition the uses on __USE_MISC as well. * sysdeps/mach/hurd/net/if_ppp.h * sysdeps/unix/sysv/linux/net/if_ppp.h: Only define struct ifpppstatsreq and struct ifpppcstatsreq if __USE_MISC is defined, to ensure struct ifreq is declared. * inet/netinet/ether.h: Condition all function prototypes on __USE_MISC, to ensure struct ether_addr is declared. sys/socket.h defines struct osockaddr only under __USE_MISC, whereas protocols/talkd.h requires it unconditionally. Here it doesn't make sense to condition the entire body of protocols/talkd.h on __USE_MISC. Rather than complicate sys/socket.h with a __need macro or duplicate the definition, I am introducing a new concept: tiny headers named bits/types/TYPE.h that define TYPE and nothing else. This can, I hope, ultimately replace *all* the __need macros. The guard macro for such headers will be __TYPE_defined, just in case application or third-party library code is looking at them. * socket/bits/types/struct_osockaddr.h: New header. * include/bits/types/struct_osockaddr.h: New wrapper. * socket/Makefile: Install the new header. * socket/sys/socket.h, inet/protocols/talkd.h: Refer to bits/types/struct_osockaddr.h for the definition of struct osockaddr.
Diffstat (limited to 'socket')
-rw-r--r--socket/Makefile3
-rw-r--r--socket/bits/types/struct_osockaddr.h12
-rw-r--r--socket/sys/socket.h8
3 files changed, 15 insertions, 8 deletions
diff --git a/socket/Makefile b/socket/Makefile
index 92450e8522..6be5ec78f7 100644
--- a/socket/Makefile
+++ b/socket/Makefile
@@ -23,7 +23,8 @@ subdir := socket
include ../Makeconfig
headers := sys/socket.h sys/un.h bits/sockaddr.h bits/socket.h \
- bits/socket2.h sys/socketvar.h net/if.h
+ bits/socket2.h bits/types/struct_osockaddr.h \
+ sys/socketvar.h net/if.h
routines := accept bind connect getpeername getsockname getsockopt \
listen recv recvfrom recvmsg send sendmsg sendto \
diff --git a/socket/bits/types/struct_osockaddr.h b/socket/bits/types/struct_osockaddr.h
new file mode 100644
index 0000000000..e0bf59d383
--- /dev/null
+++ b/socket/bits/types/struct_osockaddr.h
@@ -0,0 +1,12 @@
+#ifndef __osockaddr_defined
+#define __osockaddr_defined 1
+
+/* This is the 4.3 BSD `struct sockaddr' format, which is used as wire
+ format in the grotty old 4.3 `talk' protocol. */
+struct osockaddr
+{
+ unsigned short int sa_family;
+ unsigned char sa_data[14];
+};
+
+#endif
diff --git a/socket/sys/socket.h b/socket/sys/socket.h
index c9f0f5080d..5be1b91a93 100644
--- a/socket/sys/socket.h
+++ b/socket/sys/socket.h
@@ -38,13 +38,7 @@ __BEGIN_DECLS
#include <bits/socket.h>
#ifdef __USE_MISC
-/* This is the 4.3 BSD `struct sockaddr' format, which is used as wire
- format in the grotty old 4.3 `talk' protocol. */
-struct osockaddr
- {
- unsigned short int sa_family;
- unsigned char sa_data[14];
- };
+# include <bits/types/struct_osockaddr.h>
#endif
/* The following constants should be used for the second parameter of