X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=changer-src%2Fchg-lib.sh.in;h=a53c48a8cfff139732818a8be0e8b8d2ccbe148c;hb=refs%2Fheads%2Fmaster;hp=2df29bf0d1ab7b833f7ddfdd16da6395ade04166;hpb=d3b2175e084f88c8736ad7073eacbf4670147aec;p=debian%2Famanda

diff --git a/changer-src/chg-lib.sh.in b/changer-src/chg-lib.sh.in
index 2df29bf..a53c48a 100644
--- a/changer-src/chg-lib.sh.in
+++ b/changer-src/chg-lib.sh.in
@@ -17,53 +17,120 @@ MTF=@MT_FILE_FLAG@
 # No user-level customization should be required beyond this point.
 ################################################################################
 
-####
-# Set up paths, including PATH for finding amanda executables
-
-PATH="$PATH:@sbindir@:@libexecdir@"
 prefix="@prefix@"
 exec_prefix="@exec_prefix@"
 sbindir="@sbindir@"
 libexecdir="@libexecdir@"
+amlibexecdir="@amlibexecdir@"
+. "${amlibexecdir}/amanda-sh-lib.sh"
 
 ####
-# Gettext
-
-#+
-# Function to:
-#    Simplify gettext usage by allowing printf format
-#    strings for translators, use _() identifier for
-#    xgettext extraction similar to "C" usage and
-#    collapsing "printf `gettext fmt` ...", which is
-#    used everywhere, into one function.
-#-
-_() {
-	fmt=`gettext -d amanda "$1"`
-	shift
-	printf "$fmt" $*
+# Eponymous functions to access various amanda apps
+# TODO: move to amanda-sh-lib.sh
+
+amgetconf() {
+    "${sbindir}/amgetconf" "${@}"
+}
+amdevcheck() {
+    "${sbindir}/amdevcheck" "${@}"
 }
 
-####
-# Eponymous functions to access various amanda apps
+# This function tries to find a useable mt binary. If a fully-qualified path
+# was provided at configure time or via a config file, we check that it
+# exists and is executable. If an incomplete path was specified (e.g., "mt"),
+# we ask the shell to search the path. Returns 0 on success, 1 on failure.
+
+try_find_mt() {
+    # Only do this once.
+    if test -n $mt_found; then
+        return 0
+    fi
+
+    if test -z $MT; then
+        MT=mt
+    fi
+
+    if "`echo $MT | dd bs=1 count=1`" = "/"; then
+        if ! test -f "${MT}"; then
+            echo `_ "mt binary at '%s' not found" "$MTX"`
+            return 1
+        fi
+        if ! test -x "${MT}"; then
+            echo `_ "mt binary at '%s' is not executable" "$MTX"`
+            return 1
+        fi
+    else
+        # try running it to see if the shell can find it
+        "$MT" >/dev/null 2>/dev/null
+        if test $? -eq 127 -o $? -eq 126; then
+            echo `_ "Could not run mt binary at '%s'" "$MTX"`
+            return 1
+        fi
+    fi
+
+    mt_found=yes
+    return 0
+}
+
+# This function strips the tape: from the front of device names.
+# Capture its output with ``.
+tape_device_filename() {
+    if echo "$1"|grep '^tape:' >/dev/null; then
+	echo "$1" | sed 's/^tape://'
+    else
+	if echo "$1"|grep '^/' >/dev/null; then
+	    echo "$1"
+	fi
+    fi
+}
+
+# Invoke amdevcheck to determine whether the device is ready for use.
+#
+# @return 0 if a tape is loaded or error
+# @return 1 if a tape is tape offline or busy
+#
+# @side-effect: $amdevcheck_message is the contents of all MESSAGE lines from
+#               amdevcheck, suitable for use in higher-level error messages
+amdevcheck_status() {
+    amdevcheck_message=
+    local amdevcheck_output=`amdevcheck . $@`
+    local amdevcheck_status=$?
+
+    test "$amdevcheck_status" -ne 0 && return 0
+
+    # extract any messages
+    amdevcheck_message=`echo "$amdevcheck_output" | sed -n -e '/^MESSAGE /{' -e 's/^MESSAGE //' -e 'p' -e 'q' -e '}'`
 
-if test "@USE_VERSION_SUFFIXES@" = "yes"; then
-    amgetconf() {
-        "${sbindir}/amgetconf-@VERSION@" "${@}"
-    }
-    ammt() {
-        "${sbindir}/ammt-@VERSION@" "${@}"
-    }
-    amdd() {
-        "${sbindir}/amdd-@VERSION@" "${@}"
-    }
-else
-    amgetconf() {
-        "${sbindir}/amgetconf" "${@}"
-    }
-    amdd() {
-        "${sbindir}/amdd" "${@}"
-    }
-    amdd() {
-        "${sbindir}/amdd" "${@}"
-    }
-fi
+    # Return 1 if it's possible that the device is offline or busy; if the device cannot
+    # distinguish this state from an error condition, then our caller will just have to
+    # time out
+    if echo "$amdevcheck_output" | $EGREP "VOLUME_MISSING|DEVICE_BUSY" > /dev/null; then
+	return 1
+    else
+	return 0
+    fi
+}
+
+# This attempts to eject a device using whatever system tools are available.
+# At the moment, that means mt for tapes, and nothing otherwise, but might
+# be extended at some later time.
+
+try_eject_device() {
+    if echo "$1" | grep '^tape:' > /dev/null; then
+        try_eject_device_tape="`echo \"$1\" | cut -b6-`"
+    elif echo "$1" | grep -v : > /dev/null; then
+        try_eject_device_tape="$1"
+    else
+        try_eject_device_tape=
+    fi
+
+    if test -n "$try_eject_device_tape"; then
+        if try_find_mt; then
+            $MT $MTF "$try_eject_device_tape" offline
+        fi
+    else
+        # Technically we failed to eject the device, but we presume that's
+        # because it doesn't require ejection.
+        return 0
+    fi
+}