lib.sh: Add os function which returns current OS.

[config/dotfiles.git] / lib.sh

diff --git a/lib.sh b/lib.sh
index 31b56c066db9596df61488efd4e7a48a6c8cbeae..ea61359e2e806be5b26aaff201930743d7214b5a 100644 (file)
--- a/lib.sh
+++ b/lib.sh
@@ -14,7 +14,20 @@ m4=`which m4`
 # Check if the given program is installed. Returns 0 if it exists, 1
 # otherwise; so it can be used in if.
 installed() {
-    which $1 > /dev/null
+    which $1 | grep -E '^/' > /dev/null
+}
+
+# Prints the current OS. Supported are Debian (debian) and Mac OS X (darwin)
+# at the moment. If an unsupported OS is used an error is printed.
+os() {
+    if [ -f /etc/debian_version ]; then
+        echo debian
+    elif [ x`uname` = xDarwin ]; then
+        echo darwin
+    else
+        echo unsupported OS! >&2
+        return 1
+    fi
 }
 
 # Creates a symbolic link for file $1 in dirname of $2 with name of basenmae