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authorVictor Lowther <victor.lowther@gmail.com>2008-04-30 22:19:41 -0500
committerVictor Lowther <victor.lowther@gmail.com>2008-04-30 22:19:41 -0500
commit2d7fce602129abb1ce0590cd00637375a3423a62 (patch)
tree182cc794f646c460a7fa6c4f1e82ce263978449a /pm
parent39b5eb3eb9a7353c5dacc91b672afae3ce9c97de (diff)
Added comments and minor fixes.
Diffstat (limited to 'pm')
-rw-r--r--pm/functions.in32
1 files changed, 17 insertions, 15 deletions
diff --git a/pm/functions.in b/pm/functions.in
index ba1eded..b0401c9 100644
--- a/pm/functions.in
+++ b/pm/functions.in
@@ -38,14 +38,11 @@ spin_lock()
release_lock()
{
# $1 = lockfile
- # make sure it is ours first.
local lock="${LOCKDIR}/${1##*/}"
rm -f "${lock}"
return $?
}
-
-
command_exists()
{
# $1 = command to test for. It can be an executable in the path,
@@ -56,21 +53,15 @@ command_exists()
get_power_status()
{
- RETVAL=0
on_ac_power
case "$?" in
- "0")
- echo "ac"
- ;;
- "1")
- echo "battery"
- ;;
- "255")
- echo "error"
- RETVAL=1
+ "0") echo "ac" ;;
+ "1") echo "battery" ;;
+ "255") echo "error"
+ return 1
;;
esac
- return $RETVAL
+ return 0
}
# TODO: Module loading and unloading is Linux-specific.
@@ -162,13 +153,21 @@ restartservice()
[ -O "${STORAGEDIR}/service:$1" ] && service "$1" start
}
+# Disable a hook.
disablehook()
{
+ # $1 = name of hook to disable.
+ # $2 = optional comment.
echo "${2:-${0##*/}}" > "${STORAGEDIR}/disable_hook:${1##*/}"
}
+# Save an arbitrary piece of state for later use.
+# If called with just one argument, it reads stdin and saves it to a file.
+# If called with 2 arguments, it saves $2 to a file.
savestate()
{
+ # $1 = name of state to save
+ # $2 (optional) State to save. If omitted, save stdin.
if [ -n "$2" ]; then
echo "$2" > "${STORAGEDIR}/state:$1"
else
@@ -176,13 +175,16 @@ savestate()
fi
}
+# Check to see of a piece of state exists.
state_exists()
{
+ # $1 = name of state
[ -O "${STORAGEDIR}/state:$1" ]
}
-
+# Output previously saved state to stdout.
restorestate()
{
+ # $1 = name of state
state_exists "$1" && cat "${STORAGEDIR}/state:$1"
}