[PATCH] add support for the SUA layer (interix; windows)

[mduft@s01en22.salomon.at]

* add required build options to Makefile.
* introduce new NO_INTTYPES_H for systems lacking inttypes; code
  includes stdint.h instead, if this is set.
* introduce new NO_SYS_POLL_H for systems lacking sys/poll.h; code
  includes poll.h instead, if this is set.
* introduce NO_INITGROUPS. initgroups() call is simply omitted.

Signed-off-by: Markus Duft <mduft@gentoo.org>
---
 Makefile          |   28 ++++++++++++++++++++++++++++
 daemon.c          |    6 +++++-
 git-compat-util.h |    8 ++++++++
 3 files changed, 41 insertions(+), 1 deletions(-)

diff --git a/Makefile b/Makefile
index 1f1ce04..c9d8c9e 100644
--- a/Makefile
+++ b/Makefile
@@ -1096,6 +1096,25 @@ else
 endif
 	X = .exe
 endif
+ifeq ($(uname_S),Interix)
+	NO_SYS_POLL_H = YesPlease
+	NO_INTTYPES_H = YesPlease
+	NO_INITGROUPS = YesPlease
+	NO_IPV6 = YesPlease
+	NO_MEMMEM = YesPlease
+	NO_MKDTEMP = YesPlease
+	NO_STRTOUMAX = YesPlease
+	NO_NSEC = YesPlease
+	NO_MKSTEMPS = YesPlease
+	ifeq ($(uname_R),3.5)
+		NO_INET_NTOP = YesPlease
+		NO_INET_PTON = YesPlease
+	endif
+	ifeq ($(uname_R),5.2)
+		NO_INET_NTOP = YesPlease
+		NO_INET_PTON = YesPlease
+	endif
+endif
 ifneq (,$(findstring MINGW,$(uname_S)))
 	pathsep = ;
 	NO_PREAD = YesPlease
@@ -1360,6 +1379,15 @@ endif
 ifdef NO_SYS_SELECT_H
 	BASIC_CFLAGS += -DNO_SYS_SELECT_H
 endif
+ifdef NO_SYS_POLL_H
+	BASIC_CFLAGS += -DNO_SYS_POLL_H
+endif
+ifdef NO_INTTYPES_H
+	BASIC_CFLAGS += -DNO_INTTYPES_H
+endif
+ifdef NO_INITGROUPS
+	BASIC_CFLAGS += -DNO_INITGROUPS
+endif
 ifdef NO_MMAP
 	COMPAT_CFLAGS += -DNO_MMAP
 	COMPAT_OBJS += compat/mmap.o
diff --git a/daemon.c b/daemon.c
index 9326d3a..d68a31f 100644
--- a/daemon.c
+++ b/daemon.c
@@ -956,7 +956,11 @@ static int serve(char *listen_addr, int listen_port, struct passwd *pass, gid_t
 		    listen_addr, listen_port);
 
 	if (pass && gid &&
-	    (initgroups(pass->pw_name, gid) || setgid (gid) ||
+	    (
+#ifndef NO_INITGROUPS
+		    initgroups(pass->pw_name, gid) || 
+#endif
+	     setgid (gid) ||
 	     setuid(pass->pw_uid)))
 		die("cannot drop privileges");
 
diff --git a/git-compat-util.h b/git-compat-util.h
index 2af8d3e..625b2e4 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -106,7 +106,11 @@
 #include <utime.h>
 #ifndef __MINGW32__
 #include <sys/wait.h>
+#ifndef NO_SYS_POLL_H
 #include <sys/poll.h>
+#else
+#include <poll.h>
+#endif
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <termios.h>
@@ -118,7 +122,11 @@
 #include <arpa/inet.h>
 #include <netdb.h>
 #include <pwd.h>
+#ifndef NO_INTTYPES_H
 #include <inttypes.h>
+#else
+#include <stdint.h>
+#endif
 #if defined(__CYGWIN__)
 #undef _XOPEN_SOURCE
 #include <grp.h>
-- 
1.7.2.2