add os.Hostname

R=r
DELTA=188  (182 added, 3 deleted, 3 changed)
OCL=30856
CL=30860

1 files changed, 29 insertions, 0 deletions

diff --git a/src/pkg/os/sys_linux.go b/src/pkg/os/sys_linux.go
new file mode 100644
index 000000000..85f094eff
--- /dev/null
+++ b/src/pkg/os/sys_linux.go
@@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Linux-specific
+
+package os
+
+import "os"
+
+// Hostname returns the host name reported by the kernel.
+func Hostname() (name string, err os.Error) {
+	f, err := Open("/proc/sys/kernel/hostname", O_RDONLY, 0);
+	if err != nil {
+		return "", err;
+	}
+	defer f.Close();
+
+	var buf [512]byte;	// Enough for a DNS name.
+	n, err := f.Read(&buf);
+	if err != nil {
+		return "", err;
+	}
+
+	if n > 0 && buf[n-1] == '\n' {
+		n--;
+	}
+	return string(buf[0:n]), nil;
+}