[PATCH v14 03/21] unix-socket.c: add stub implementation when unix sockets are not supported

[David Turner <novalis@novalis.org>]

From: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>

This keeps #ifdef at the callee instead of caller, it's less messier.

The caller in question is in read-cache.c which, unlike other
unix-socket callers so far, is always built regardless of unix socket
support. No extra handling (for ENOSYS) is needed because in this
build, index-helper does not exist, $GIT_DIR/index-helper.sock does
not exist, so no unix socket call is made by read-cache.c in the first
place.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 Makefile      |  2 ++
 unix-socket.h | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/Makefile b/Makefile
index 2742a69..7920609 100644
--- a/Makefile
+++ b/Makefile
@@ -1341,6 +1341,8 @@ ifndef NO_UNIX_SOCKETS
 	LIB_OBJS += unix-socket.o
 	PROGRAM_OBJS += credential-cache.o
 	PROGRAM_OBJS += credential-cache--daemon.o
+else
+	BASIC_CFLAGS += -DNO_UNIX_SOCKETS
 endif
 
 ifdef NO_ICONV
diff --git a/unix-socket.h b/unix-socket.h
index e271aee..f1cba70 100644
--- a/unix-socket.h
+++ b/unix-socket.h
@@ -1,7 +1,25 @@
 #ifndef UNIX_SOCKET_H
 #define UNIX_SOCKET_H
 
+#ifndef NO_UNIX_SOCKETS
+
 int unix_stream_connect(const char *path);
 int unix_stream_listen(const char *path);
 
+#else
+
+static inline int unix_stream_connect(const char *path)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static inline int unix_stream_listen(const char *path)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+#endif
+
 #endif /* UNIX_SOCKET_H */
-- 
1.9.1