From 57003dd777187d6b6975cfa59d8511f6c0c3af06 Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Sat, 13 Apr 2013 00:42:13 +0200
Subject: [PATCH] Add gethostname(2).

---
 libc/Makefile         |  1 +
 libc/gethostname.cpp  | 40 ++++++++++++++++++++++++++++++++++++++++
 libc/include/unistd.h |  2 +-
 3 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 libc/gethostname.cpp

diff --git a/libc/Makefile b/libc/Makefile
index 5afd48a0..dbc5d54c 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -220,6 +220,7 @@ getdtablesize.o \
 getegid.o \
 geteuid.o \
 getgid.o \
+gethostname.o \
 getpagesize.o \
 getpid.o \
 getppid.o \
diff --git a/libc/gethostname.cpp b/libc/gethostname.cpp
new file mode 100644
index 00000000..58a550ca
--- /dev/null
+++ b/libc/gethostname.cpp
@@ -0,0 +1,40 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    This file is part of the Sortix C Library.
+
+    The Sortix C Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    The Sortix C Library is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
+
+    gethostname.cpp
+    Get the hostname.
+
+*******************************************************************************/
+
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+extern "C" int gethostname(char* name, size_t len)
+{
+	const char* hostname = getenv("HOSTNAME");
+	if ( !hostname )
+		hostname = "sortix";
+	size_t hostname_len = strlen(hostname);
+	if ( len < hostname_len+1 )
+		return errno = ENAMETOOLONG, -1;
+	strcpy(name, hostname);
+	return 0;
+}
diff --git a/libc/include/unistd.h b/libc/include/unistd.h
index 901f416a..80cce606 100644
--- a/libc/include/unistd.h
+++ b/libc/include/unistd.h
@@ -115,7 +115,6 @@ int fexecve(int, char* const [], char* const []);
 long fpathconf(int, int);
 int getgroups(int, gid_t []);
 long gethostid(void);
-int gethostname(char*, size_t);
 char* getlogin(void);
 int getlogin_r(char*, size_t);
 int getopt(int, char* const [], const char*);
@@ -170,6 +169,7 @@ char* getcwd(char*, size_t);
 char* get_current_dir_name(void);
 gid_t getegid(void);
 uid_t geteuid(void);
+int gethostname(char*, size_t);
 pid_t getpid(void);
 pid_t getppid(void);
 uid_t getuid(void);