scripts: Move myip and webcam functions to separate scripts. Remove sx.

Add comment in .xinitrc on using vlock with startx.

.scripts/myip

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+curl ifconfig.me

.scripts/webcam

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+if [ $# -ne 0 ]; then
+	cat <<EOF>&2
+Test the webcam using an mplayer-compatible program.
+
+EOF
+	exit
+fi
+
+for i in mpv mplayer2 mplayer; do
+	if command -v $i >/dev/null 2>&1 
+		 $i --tv driver=v4l2:width=640:height=480:device=/dev/video0 tv://
+		 exit
+	fi
+done
+
+echo >&2 "mplayer-compatible program not found"
+exit 1

.shell.d/alias_rc

@@ -39,24 +39,6 @@ alias mkdir='mkdir -p'
 ## Reset terminal -- Faster alternative of 'reset'.
 alias cls='printf "\ec"'
 
-##==============================================================================
-## TODO: Move those to scripts?
-
-# List desktop applications.
-[ -d /usr/share/applications ] && XDG_APPS=($XDG_APPS /usr/share/applications)
-[ -d /usr/local/share/applications ] && XDG_APPS=($XDG_APPS /usr/local/share/applications)
-[ ${#XDG_APPS} -ne 0 ] && alias applist='grep -R "^Name=" $XDG_APPS | cut -d'=' -f2 | sort'
-
-## Get your external IP.
-command -v curl >/dev/null 2>&1 && alias myip='curl ifconfig.me'
-
-## Start X and lock current terminal (press ENTER when back in terminal to
-## prompt for password). Useless if X is running on the same TTY.
-command -v vlock >/dev/null 2>&1 && alias sx='startx & vlock'
-
-## Udiskie
-command -v udiskie-umount >/dev/null 2>&1 && alias uua='udiskie-umount -a'
-
 ##==============================================================================
 ## Pacman aliases
 

.xinitrc

@@ -1,5 +1,8 @@
 #!/bin/sh
 
+## WARNING: If started from TTY on a multi-seat, the user must run 'startx &
+## vlock' to ensure the X locker cannot be bypassed.
+
 ## Run site init scripts. Usually not necessary.
 if [ -d /etc/X11/xinit/xinitrc.d ] ; then
 	for f in /etc/X11/xinit/xinitrc.d/?*.sh ; do
@@ -25,4 +28,3 @@ fi
 ## some login managers. Beside, systemd sessions may sigkill all user apps on
 ## logoff, preventing a clean termination.
 # command -v sessionclean >/dev/null 2>&1 && sessionclean
-