1 files changed, 81 insertions, 0 deletions
diff --git a/contrib/awk/awklib/eg/prog/alarm.awk b/contrib/awk/awklib/eg/prog/alarm.awk
new file mode 100644
index 0000000..e158e45
--- /dev/null
+++ b/contrib/awk/awklib/eg/prog/alarm.awk
@@ -0,0 +1,81 @@
+# alarm --- set an alarm
+# Arnold Robbins, arnold@gnu.org, Public Domain
+# May 1993
+
+# usage: alarm time [ "message" [ count [ delay ] ] ]
+
+BEGIN    \
+{
+    # Initial argument sanity checking
+    usage1 = "usage: alarm time ['message' [count [delay]]]"
+    usage2 = sprintf("\t(%s) time ::= hh:mm", ARGV[1])
+
+    if (ARGC < 2) {
+        print usage > "/dev/stderr"
+        exit 1
+    } else if (ARGC == 5) {
+        delay = ARGV[4] + 0
+        count = ARGV[3] + 0
+        message = ARGV[2]
+    } else if (ARGC == 4) {
+        count = ARGV[3] + 0
+        message = ARGV[2]
+    } else if (ARGC == 3) {
+        message = ARGV[2]
+    } else if (ARGV[1] !~ /[0-9]?[0-9]:[0-9][0-9]/) {
+        print usage1 > "/dev/stderr"
+        print usage2 > "/dev/stderr"
+        exit 1
+    }
+
+    # set defaults for once we reach the desired time
+    if (delay == 0)
+        delay = 180    # 3 minutes
+    if (count == 0)
+        count = 5
+    if (message == "")
+        message = sprintf("\aIt is now %s!\a", ARGV[1])
+    else if (index(message, "\a") == 0)
+        message = "\a" message "\a"
+    # split up dest time
+    split(ARGV[1], atime, ":")
+    hour = atime[1] + 0    # force numeric
+    minute = atime[2] + 0  # force numeric
+
+    # get current broken down time
+    gettimeofday(now)
+
+    # if time given is 12-hour hours and it's after that
+    # hour, e.g., `alarm 5:30' at 9 a.m. means 5:30 p.m.,
+    # then add 12 to real hour
+    if (hour < 12 && now["hour"] > hour)
+        hour += 12
+
+    # set target time in seconds since midnight
+    target = (hour * 60 * 60) + (minute * 60)
+
+    # get current time in seconds since midnight
+    current = (now["hour"] * 60 * 60) + \
+               (now["minute"] * 60) + now["second"]
+
+    # how long to sleep for
+    naptime = target - current
+    if (naptime <= 0) {
+        print "time is in the past!" > "/dev/stderr"
+        exit 1
+    }
+    # zzzzzz..... go away if interrupted
+    if (system(sprintf("sleep %d", naptime)) != 0)
+        exit 1
+
+    # time to notify!
+    command = sprintf("sleep %d", delay)
+    for (i = 1; i <= count; i++) {
+        print message
+        # if sleep command interrupted, go away
+        if (system(command) != 0)
+            break
+    }
+
+    exit 0
+}