9 files changed, 81 insertions, 37 deletions
diff --git a/drivers/unix/dir_access_unix.cpp b/drivers/unix/dir_access_unix.cpp
index 3323da5db4..a2c9bae852 100644
--- a/drivers/unix/dir_access_unix.cpp
+++ b/drivers/unix/dir_access_unix.cpp
@@ -406,6 +406,53 @@ Error DirAccessUnix::remove(String p_path) {
 	}
 }
 
+bool DirAccessUnix::is_link(String p_file) {
+	if (p_file.is_rel_path()) {
+		p_file = get_current_dir().plus_file(p_file);
+	}
+
+	p_file = fix_path(p_file);
+
+	struct stat flags;
+	if ((lstat(p_file.utf8().get_data(), &flags) != 0)) {
+		return FAILED;
+	}
+
+	return S_ISLNK(flags.st_mode);
+}
+
+String DirAccessUnix::read_link(String p_file) {
+	if (p_file.is_rel_path()) {
+		p_file = get_current_dir().plus_file(p_file);
+	}
+
+	p_file = fix_path(p_file);
+
+	char buf[256];
+	memset(buf, 0, 256);
+	ssize_t len = readlink(p_file.utf8().get_data(), buf, sizeof(buf));
+	String link;
+	if (len > 0) {
+		link.parse_utf8(buf, len);
+	}
+	return link;
+}
+
+Error DirAccessUnix::create_link(String p_source, String p_target) {
+	if (p_target.is_rel_path()) {
+		p_target = get_current_dir().plus_file(p_target);
+	}
+
+	p_source = fix_path(p_source);
+	p_target = fix_path(p_target);
+
+	if (symlink(p_source.utf8().get_data(), p_target.utf8().get_data()) == 0) {
+		return OK;
+	} else {
+		return FAILED;
+	}
+}
+
 uint64_t DirAccessUnix::get_space_left() {
 #ifndef NO_STATVFS
 	struct statvfs vfs;
@@ -413,7 +460,7 @@ uint64_t DirAccessUnix::get_space_left() {
 		return 0;
 	};
 
-	return vfs.f_bfree * vfs.f_bsize;
+	return (uint64_t)vfs.f_bavail * (uint64_t)vfs.f_frsize;
 #else
 	// FIXME: Implement this.
 	return 0;
diff --git a/drivers/unix/dir_access_unix.h b/drivers/unix/dir_access_unix.h
index 12994a6b76..8b19308967 100644
--- a/drivers/unix/dir_access_unix.h
+++ b/drivers/unix/dir_access_unix.h
@@ -33,7 +33,7 @@
 
 #if defined(UNIX_ENABLED) || defined(LIBC_FILEIO_ENABLED)
 
-#include "core/os/dir_access.h"
+#include "core/io/dir_access.h"
 
 #include <dirent.h>
 #include <sys/stat.h>
@@ -79,6 +79,10 @@ public:
 	virtual Error rename(String p_path, String p_new_path);
 	virtual Error remove(String p_path);
 
+	virtual bool is_link(String p_file);
+	virtual String read_link(String p_file);
+	virtual Error create_link(String p_source, String p_target);
+
 	virtual uint64_t get_space_left();
 
 	virtual String get_filesystem_type() const;
diff --git a/drivers/unix/file_access_unix.cpp b/drivers/unix/file_access_unix.cpp
index de9a7867ee..f07c654bd6 100644
--- a/drivers/unix/file_access_unix.cpp
+++ b/drivers/unix/file_access_unix.cpp
@@ -111,7 +111,7 @@ Error FileAccessUnix::_open(const String &p_path, int p_mode_flags) {
 		}
 	}
 
-	if (is_backup_save_enabled() && (p_mode_flags & WRITE) && !(p_mode_flags & READ)) {
+	if (is_backup_save_enabled() && (p_mode_flags == WRITE)) {
 		save_path = path;
 		path = path + ".tmp";
 	}
@@ -212,7 +212,7 @@ uint64_t FileAccessUnix::get_position() const {
 	return pos;
 }
 
-uint64_t FileAccessUnix::get_len() const {
+uint64_t FileAccessUnix::get_length() const {
 	ERR_FAIL_COND_V_MSG(!f, 0, "File must be opened before use.");
 
 	int64_t pos = ftello(f);
@@ -264,7 +264,7 @@ void FileAccessUnix::store_8(uint8_t p_dest) {
 
 void FileAccessUnix::store_buffer(const uint8_t *p_src, uint64_t p_length) {
 	ERR_FAIL_COND_MSG(!f, "File must be opened before use.");
-	ERR_FAIL_COND(!p_src);
+	ERR_FAIL_COND(!p_src && p_length > 0);
 	ERR_FAIL_COND(fwrite(p_src, 1, p_length, f) != p_length);
 }
 
diff --git a/drivers/unix/file_access_unix.h b/drivers/unix/file_access_unix.h
index 6aa3e1529f..8b27c308e1 100644
--- a/drivers/unix/file_access_unix.h
+++ b/drivers/unix/file_access_unix.h
@@ -31,7 +31,7 @@
 #ifndef FILE_ACCESS_UNIX_H
 #define FILE_ACCESS_UNIX_H
 
-#include "core/os/file_access.h"
+#include "core/io/file_access.h"
 #include "core/os/memory.h"
 
 #include <stdio.h>
@@ -64,7 +64,7 @@ public:
 	virtual void seek(uint64_t p_position); ///< seek to a given position
 	virtual void seek_end(int64_t p_position = 0); ///< seek from the end of file
 	virtual uint64_t get_position() const; ///< get position in the file
-	virtual uint64_t get_len() const; ///< get size of the file
+	virtual uint64_t get_length() const; ///< get size of the file
 
 	virtual bool eof_reached() const; ///< reading passed EOF
 
diff --git a/drivers/unix/ip_unix.cpp b/drivers/unix/ip_unix.cpp
index 053e3fd9d6..8a880ab9c8 100644
--- a/drivers/unix/ip_unix.cpp
+++ b/drivers/unix/ip_unix.cpp
@@ -41,19 +41,7 @@
 #include <windows.h>
 #include <ws2tcpip.h>
 #ifndef UWP_ENABLED
-#if defined(__MINGW32__) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 4)
-// MinGW-w64 on Ubuntu 12.04 (our Travis build env) has bugs in this code where
-// some includes are missing in dependencies of iphlpapi.h for WINVER >= 0x0600 (Vista).
-// We don't use this Vista code for now, so working it around by disabling it.
-// MinGW-w64 >= 4.0 seems to be better judging by its headers.
-#undef _WIN32_WINNT
-#define _WIN32_WINNT 0x0501 // Windows XP, disable Vista API
 #include <iphlpapi.h>
-#undef _WIN32_WINNT
-#define _WIN32_WINNT 0x0600 // Re-enable Vista API
-#else
-#include <iphlpapi.h>
-#endif // MINGW hack
 #endif
 #else // UNIX
 #include <netdb.h>
@@ -89,7 +77,7 @@ static IPAddress _sockaddr2ip(struct sockaddr *p_addr) {
 	return ip;
 };
 
-IPAddress IPUnix::_resolve_hostname(const String &p_hostname, Type p_type) {
+void IPUnix::_resolve_hostname(List<IPAddress> &r_addresses, const String &p_hostname, Type p_type) const {
 	struct addrinfo hints;
 	struct addrinfo *result = nullptr;
 
@@ -108,7 +96,7 @@ IPAddress IPUnix::_resolve_hostname(const String &p_hostname, Type p_type) {
 	int s = getaddrinfo(p_hostname.utf8().get_data(), nullptr, &hints, &result);
 	if (s != 0) {
 		ERR_PRINT("getaddrinfo failed! Cannot resolve hostname.");
-		return IPAddress();
+		return;
 	};
 
 	if (result == nullptr || result->ai_addr == nullptr) {
@@ -116,14 +104,24 @@ IPAddress IPUnix::_resolve_hostname(const String &p_hostname, Type p_type) {
 		if (result) {
 			freeaddrinfo(result);
 		}
-		return IPAddress();
+		return;
 	};
 
-	IPAddress ip = _sockaddr2ip(result->ai_addr);
+	struct addrinfo *next = result;
 
-	freeaddrinfo(result);
+	do {
+		if (next->ai_addr == NULL) {
+			next = next->ai_next;
+			continue;
+		}
+		IPAddress ip = _sockaddr2ip(next->ai_addr);
+		if (!r_addresses.find(ip)) {
+			r_addresses.push_back(ip);
+		}
+		next = next->ai_next;
+	} while (next);
 
-	return ip;
+	freeaddrinfo(result);
 }
 
 #if defined(WINDOWS_ENABLED)
diff --git a/drivers/unix/ip_unix.h b/drivers/unix/ip_unix.h
index e6479be6e5..0d64648b39 100644
--- a/drivers/unix/ip_unix.h
+++ b/drivers/unix/ip_unix.h
@@ -38,7 +38,7 @@
 class IPUnix : public IP {
 	GDCLASS(IPUnix, IP);
 
-	virtual IPAddress _resolve_hostname(const String &p_hostname, IP::Type p_type) override;
+	virtual void _resolve_hostname(List<IPAddress> &r_addresses, const String &p_hostname, Type p_type = TYPE_ANY) const override;
 
 	static IP *_create_unix();
 
diff --git a/drivers/unix/net_socket_posix.cpp b/drivers/unix/net_socket_posix.cpp
index 222aef998c..e01c6a0e0f 100644
--- a/drivers/unix/net_socket_posix.cpp
+++ b/drivers/unix/net_socket_posix.cpp
@@ -269,11 +269,11 @@ _FORCE_INLINE_ Error NetSocketPosix::_change_multicast_group(IPAddress p_ip, Str
 			break; // IPv6 uses index.
 		}
 
-		for (List<IPAddress>::Element *F = c.ip_addresses.front(); F; F = F->next()) {
-			if (!F->get().is_ipv4()) {
+		for (const IPAddress &F : c.ip_addresses) {
+			if (!F.is_ipv4()) {
 				continue; // Wrong IP type
 			}
-			if_ip = F->get();
+			if_ip = F;
 			break;
 		}
 		break;
@@ -466,7 +466,7 @@ Error NetSocketPosix::poll(PollType p_type, int p_timeout) const {
 	FD_ZERO(&ex);
 	FD_SET(_sock, &ex);
 	struct timeval timeout = { p_timeout / 1000, (p_timeout % 1000) * 1000 };
-	// For blocking operation, pass nullptr  timeout pointer to select.
+	// For blocking operation, pass nullptr timeout pointer to select.
 	struct timeval *tp = nullptr;
 	if (p_timeout >= 0) {
 		//  If timeout is non-negative, we want to specify the timeout instead.
diff --git a/drivers/unix/os_unix.cpp b/drivers/unix/os_unix.cpp
index 15cd7bee92..f6a3e93b55 100644
--- a/drivers/unix/os_unix.cpp
+++ b/drivers/unix/os_unix.cpp
@@ -139,10 +139,6 @@ void OS_Unix::finalize_core() {
 	NetSocketPosix::cleanup();
 }
 
-void OS_Unix::alert(const String &p_alert, const String &p_title) {
-	fprintf(stderr, "ERROR: %s\n", p_alert.utf8().get_data());
-}
-
 String OS_Unix::get_stdin_string(bool p_block) {
 	if (p_block) {
 		char buff[1024];
@@ -195,8 +191,8 @@ OS::Time OS_Unix::get_time(bool utc) const {
 	}
 	Time ret;
 	ret.hour = lt.tm_hour;
-	ret.min = lt.tm_min;
-	ret.sec = lt.tm_sec;
+	ret.minute = lt.tm_min;
+	ret.second = lt.tm_sec;
 	get_time_zone_info();
 	return ret;
 }
diff --git a/drivers/unix/os_unix.h b/drivers/unix/os_unix.h
index 6c79d984e9..bf82019d38 100644
--- a/drivers/unix/os_unix.h
+++ b/drivers/unix/os_unix.h
@@ -52,7 +52,6 @@ protected:
 public:
 	OS_Unix();
 
-	virtual void alert(const String &p_alert, const String &p_title = "ALERT!");
 	virtual String get_stdin_string(bool p_block) override;
 
 	//virtual void set_mouse_show(bool p_show);