sketch out first steps of prettyprompt.go

1 files changed, 65 insertions, 0 deletions

diff --git a/pkg/prompt/login.go b/pkg/prompt/login.go
new file mode 100644
index 0000000..b5fcebd
--- /dev/null
+++ b/pkg/prompt/login.go
@@ -0,0 +1,65 @@
+/*******************************************************************************
+*
+* Copyright 2017 Stefan Majewsky <majewsky@gmx.net>
+*
+* This program is free software: you can redistribute it and/or modify it under
+* the terms of the GNU General Public License as published by the Free Software
+* Foundation, either version 3 of the License, or (at your option) any later
+* version.
+*
+* This program 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License along with
+* this program. If not, see <http://www.gnu.org/licenses/>.
+*
+*******************************************************************************/
+
+package prompt
+
+import "os"
+
+//#include <sys/types.h>
+//#include <pwd.h>
+import "C"
+
+func addLogin(buf *LineBuffer) {
+	//show user name
+	userName := getUserName()
+	commonUser := getenvOrDefault("PRETTYPROMPT_COMMONUSER", "stefan")
+	if commonUser != userName {
+		color := "0"
+		if userName == "root" {
+			color = "1;41"
+		}
+		buf.WriteWithColor(userName, color)
+		buf.Write([]byte("@"))
+	}
+
+	//show hostname
+	hostname, err := os.Hostname()
+	if err != nil {
+		handleError(err)
+		hostname = "<unknown>"
+	}
+	buf.WriteWithColor(
+		getenvOrDefault("PRETTYPROMPT_HOSTCOLOR", "0;33"),
+		hostname,
+	)
+	buf.Write([]byte(" "))
+}
+
+func getUserName() string {
+	//try to find username via getpwuid(getuid())
+	pw, err := C.getpwuid(C.__uid_t(os.Getuid()))
+	if err == nil {
+		return C.GoString(pw.pw_name)
+	}
+	//fallback to $USER, if set
+	if name := os.Getenv("USER"); name != "" {
+		return name
+	}
+	handleError(err)
+	return "<unknown>"
+}