lib.sh: Add support for less capable sh/test.

[config/dotfiles.git] / lib.sh

diff --git a/lib.sh b/lib.sh
index 93c45cf6645961d1d5b2de75c6cf5b3c8ea943a0..d9b14c50c8c1851ef1542ed9e2cd7ece5e003d3b 100644 (file)
--- a/lib.sh
+++ b/lib.sh
@@ -18,6 +18,7 @@ installed() {
 # - Debian (debian)
 # - Gentoo (gentoo)
 # - Mac OS X (darwin)
+# - Solaris/OpenSolaris (sun)
 # If an unsupported OS is used an error is printed.
 os() {
     if [ -f /etc/debian_version ]; then
@@ -26,6 +27,8 @@ os() {
         echo gentoo
     elif [ x`uname` = xDarwin ]; then
         echo darwin
+    elif [ x`uname` = xSunOS ]; then
+        echo sun
     else
         echo unsupported OS! >&2
         return 1
@@ -40,7 +43,8 @@ os() {
 link() {
     # Get all necessary paths.
     pwd=`pwd`
-    base=`dirname "$2"`
+    base=`echo "$2" | sed "s|\~|$HOME|"` # expand ~, some sh don't do it
+    base=`dirname "$base"`
     source=`echo "$pwd/$1" | sed "s|$base/||"`
     target=`basename "$2"`
 
@@ -49,13 +53,14 @@ link() {
 
     # Abort if the target file exists and is no symbolic link. Prevents
     # overwriting real files.
-    if [ -e "$target" -a ! -h "$target" ]; then
+    if [ \( -f "$target" -a ! -h "$target" \) -o \
+         \( -s "$target" -a ! -h "$target" \) ]; then
         echo "link(): target '$target' exists already and is no symbolic link!" >&2
         exit 1
     fi
 
-    # Make sure the source exists.
-    if [ ! -e "$source" ]; then
+    # Make sure the source exists (is file, directory or link).
+    if [ ! -f "$source" -a ! -d "$source" -a ! -h "$source" ]; then
         echo "link(): source '$source' doesn't exist!" >&2
         exit 1
     fi