Prefixing debhelper files with package name.

[live-boot-grml.git] / debian / live-initramfs.init

diff --git a/debian/live-initramfs.init b/debian/live-initramfs.init
index a7274bd..1dd72cc 100644 (file)
--- a/debian/live-initramfs.init
+++ b/debian/live-initramfs.init
@@ -24,6 +24,9 @@ DO_SNAPSHOT=/sbin/live-snapshot
 # Exit if system was not booted by live-initramfs
 grep -qs boot=live /proc/cmdline || exit 0
 
+# Exit if the system was booted from an ISO image rather than a physical CD
+grep -qs find_iso= /proc/cmdline && exit 0
+
 # Read configuration variable file if it is present
 [ -r /etc/live.conf ] && . /etc/live.conf
 
@@ -37,30 +40,53 @@ grep -qs boot=live /proc/cmdline || exit 0
 # Try to cache everything we're likely to need after ejecting.  This
 # is fragile and simple-minded, but our options are limited.
 cache_path() {
-    path="$1"
-
-    if [ -d "$path" ]; then
-        find "$path" -type f | xargs cat > /dev/null 2>&1
-    elif [ -f "$path" ]; then
-        if [ -x "$path" ]; then
-            if file "$path" | grep -q 'dynamically linked'; then
-                for lib in $(ldd "$path" | awk '{ print $3 }'); do
-                    cache_path "$lib"
+    path="${1}"
+
+    if [ -d "${path}" ]; then
+        find "${path}" -type f | xargs cat > /dev/null 2>&1
+    elif [ -f "${path}" ]; then
+        if [ -x "${path}" ]; then
+            if file "${path}" | grep -q 'dynamically linked'; then
+                for lib in $(ldd "${path}" | awk '{ print $3 }'); do
+                    cache_path "${lib}"
                 done
             fi
         fi
-        cat "$path" >/dev/null 2>&1
+        cat "${path}" >/dev/null 2>&1
     fi
 }
 
+get_boot_device() {
+    # search in /proc/mounts for the device that is mounted at /live/image
+    while read DEVICE MOUNT REST; do
+        if [ "${MOUNT}" == "/live/image" ]; then
+            echo "${DEVICE}"
+            exit 0
+        fi
+    done < /proc/mounts
+}
+
+device_is_USB_flash_drive()
+{
+    # remove leading "/dev/" and all trailing numbers from input
+    DEVICE=$(expr substr ${1} 6 3)
+    # check that device starts with "sd"
+    [ "$(expr substr ${DEVICE} 1 2)" != "sd" ] && return 1
+    # check that the device is an USB device
+    if readlink /sys/block/${DEVICE}/device | grep -q usb ; then
+        return 0
+    fi
+    return 1
+}
+
 do_stop ()
 {
     if [ ! -z "${ROOTSNAP}" ]; then
-        $DO_SNAPSHOT --resync-string="${ROOTSNAP}"
+        ${DO_SNAPSHOT} --resync-string="${ROOTSNAP}"
     fi
 
     if [ ! -z "${HOMESNAP}" ]; then
-        $DO_SNAPSHOT --resync-string="${HOMESNAP}"
+        ${DO_SNAPSHOT} --resync-string="${HOMESNAP}"
     fi
 
     # check for netboot
@@ -68,12 +94,17 @@ do_stop ()
         return 0
     fi
 
-    for path in $(which halt) $(which reboot) /etc/rc?.d /etc/default; do
-        cache_path "$path"
+    prompt=1
+    if grep -qs noprompt /proc/cmdline; then
+       prompt=
+    fi
+
+    for path in $(which halt) $(which reboot) /etc/rc?.d /etc/default $(which stty); do
+        cache_path "${path}"
     done
 
     for x in $(cat /proc/cmdline); do
-       case $x in
+       case ${x} in
            quickreboot)
                QUICKREBOOT="Yes"
            ;;
@@ -81,10 +112,30 @@ do_stop ()
     done
 
     if [ -z ${QUICKREBOOT} ]; then
-       eject -p -m /live_media >/dev/null 2>&1
+       # TODO: i18n, dialog
+       if [ -x /usr/bin/eject ]
+       then
+               BOOT_DEVICE="$(get_boot_device)"
+               if device_is_USB_flash_drive ${BOOT_DEVICE}; then
+                       # do NOT eject USB flash drives!
+                       # otherwise rebooting with most USB flash drives failes because
+                       # they actually remember the "ejected" state even after reboot
+                       MESSAGE="Please remove the USB flash drive"
+               else
+                       # ejecting is a very good idea here
+                       eject -p -m /live/image >/dev/null 2>&1
+                       # TODO: detect CD
+                       MEDIUM="DVD"
+                       MESSAGE="Please remove the ${MEDIUM}, close the ${MEDIUM} tray (if any)"
+               fi
+               MESSAGE="${MESSAGE} and press ENTER:"
+
+               [ "$prompt" ] || return 0
+       fi
+
+       stty sane < /dev/console
 
-       # XXX - i18n
-       echo "Please remove the disc and close the tray (if any) then press ENTER: "
+       echo -n -e "\n\n${MESSAGE}" > /dev/console
        if [ -x /sbin/usplash_write ]; then
            /sbin/usplash_write "TIMEOUT 86400"
            /sbin/usplash_write "TEXT-URGENT Please remove the disc, close the tray (if any)"
@@ -95,20 +146,20 @@ do_stop ()
     fi
 }
 
-case "$1" in
+case "${1}" in
     start|restart|reload|force-reload|status)
-        [ "$VERBOSE" != no ] && log_end_msg 0
+        [ "${VERBOSE}" != no ] && log_end_msg 0
         ;;
     stop)
         log_begin_msg "${NAME} is resyncing snapshots and caching reboot files..."
         do_stop
-        case "$?" in
-            0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
-            2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+        case "${?}" in
+            0|1) [ "${VERBOSE}" != no ] && log_end_msg 0 ;;
+            2) [ "${VERBOSE}" != no ] && log_end_msg 1 ;;
         esac
         ;;
     *)
-        log_success_msg "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2
+        log_success_msg "Usage: ${SCRIPTNAME} {start|stop|restart|force-reload}" >&2
         exit 3
         ;;
 esac