Add compat bits for libtls on Windows

include/compat/sys/types.h

@@ -21,6 +21,7 @@
 #ifdef __MINGW32__
 #include <_bsd_types.h>
 typedef uint32_t        in_addr_t;
+typedef uint32_t        uid_t;
 #endif
 
 #ifdef _MSC_VER
@@ -29,6 +30,7 @@ typedef unsigned short  u_short;
 typedef unsigned int    u_int;
 typedef uint32_t        in_addr_t;
 typedef uint32_t        mode_t;
+typedef uint32_t        uid_t;
 
 #include <basetsd.h>
 typedef SSIZE_T ssize_t;

include/compat/unistd.h

@@ -7,7 +7,16 @@
 #define LIBCRYPTOCOMPAT_UNISTD_H
 
 #ifndef _MSC_VER
+
 #include_next <unistd.h>
+
+#ifdef __MINGW32__
+int ftruncate(int fd, off_t length);
+uid_t getuid(void);
+ssize_t pread(int d, void *buf, size_t nbytes, off_t offset);
+ssize_t pwrite(int d, const void *buf, size_t nbytes, off_t offset);
+#endif
+
 #else
 
 #include <stdlib.h>
@@ -22,10 +31,19 @@
 #define X_OK    0
 #define F_OK    0
 
+#define SEEK_SET        0
+#define SEEK_CUR        1
+#define SEEK_END        2
+
 #define access _access
 
 unsigned int sleep(unsigned int seconds);
 
+int ftruncate(int fd, off_t length);
+uid_t getuid(void);
+ssize_t pread(int d, void *buf, size_t nbytes, off_t offset);
+ssize_t pwrite(int d, const void *buf, size_t nbytes, off_t offset);
+
 #endif
 
 #ifndef HAVE_GETENTROPY

tls/CMakeLists.txt

@@ -19,6 +19,16 @@ set(
 	tls_verify.c
 )
 
+if(CMAKE_HOST_WIN32)
+set(
+	TLS_SRC
+	${TLS_SRC}
+	compat/ftruncate.c
+	compat/getuid.c
+	compat/pread.c
+	compat/pwrite.c
+)
+endif()
 
 if(NOT "${OPENSSLDIR}" STREQUAL "")
 	add_definitions(-D_PATH_SSL_CA_FILE=\"${OPENSSLDIR}/cert.pem\")

tls/Makefile.am

@@ -30,3 +30,10 @@ libtls_la_SOURCES += tls_peer.c
 libtls_la_SOURCES += tls_util.c
 libtls_la_SOURCES += tls_verify.c
 noinst_HEADERS = tls_internal.h
+
+if HOST_WIN
+libtls_la_SOURCES += compat/ftruncate.c
+libtls_la_SOURCES += compat/getuid.c
+libtls_la_SOURCES += compat/pread.c
+libtls_la_SOURCES += compat/pwrite.c
+endif

tls/compat/ftruncate.c

@@ -0,0 +1,13 @@
+/*
+ * Public domain
+ *
+ * Kinichiro Inoguchi <inoguchi@openbsd.org>
+ */
+
+#include <unistd.h>
+
+int
+ftruncate(int fd, off_t length)
+{
+	return _chsize(fd, length);
+}

tls/compat/getuid.c

@@ -0,0 +1,14 @@
+/*
+ * Public domain
+ *
+ * Kinichiro Inoguchi <inoguchi@openbsd.org>
+ */
+
+#include <unistd.h>
+
+uid_t
+getuid(void)
+{
+	/* Windows fstat sets 0 as st_uid */
+	return 0;
+}

tls/compat/pread.c

@@ -0,0 +1,23 @@
+/*
+ * Public domain
+ *
+ * Kinichiro Inoguchi <inoguchi@openbsd.org>
+ */
+
+#include <unistd.h>
+
+ssize_t
+pread(int d, void *buf, size_t nbytes, off_t offset)
+{
+	off_t cpos, opos, rpos;
+	ssize_t bytes;
+	if((cpos = lseek(d, 0, SEEK_CUR)) == -1)
+		return -1;
+	if((opos = lseek(d, offset, SEEK_SET)) == -1)
+		return -1;
+	if((bytes = read(d, buf, nbytes)) == -1)
+		return -1;
+	if((rpos = lseek(d, cpos, SEEK_SET)) == -1)
+		return -1;
+	return bytes;
+}

tls/compat/pwrite.c

@@ -0,0 +1,23 @@
+/*
+ * Public domain
+ *
+ * Kinichiro Inoguchi <inoguchi@openbsd.org>
+ */
+
+#include <unistd.h>
+
+ssize_t
+pwrite(int d, const void *buf, size_t nbytes, off_t offset)
+{
+	off_t cpos, opos, rpos;
+	ssize_t bytes;
+	if((cpos = lseek(d, 0, SEEK_CUR)) == -1)
+		return -1;
+	if((opos = lseek(d, offset, SEEK_SET)) == -1)
+		return -1;
+	if((bytes = write(d, buf, nbytes)) == -1)
+		return -1;
+	if((rpos = lseek(d, cpos, SEEK_SET)) == -1)
+		return -1;
+	return bytes;
+}