Remove non-portable grep usage from startx

startx uses non-portable grep flags (-o). grep isn't even needed for
this and has been replaced with substring removal.

Closes #6

1 files changed, 1 insertions, 1 deletions

diff --git a/startx.cpp b/startx.cpp
index 125c398..31187b9 100644
--- a/startx.cpp
+++ b/startx.cpp
@@ -206,7 +206,7 @@ if [ x"$server" = x ]; then
     XCOMM "https://bugzilla.redhat.com/show_bug.cgi?id=806491"
     tty=$(tty)
     if expr "$tty" : '/dev/tty[0-9][0-9]*$' > /dev/null; then
-        tty_num=$(echo "$tty" | grep -oE '[0-9]+$')
+        tty_num=${tty#/dev/tty}
         vtarg="vt$tty_num -keeptty"
     fi
 #endif