mirror of
git://slackware.nl/current.git
synced 2024-12-28 09:59:53 +01:00
152 lines
4.1 KiB
Diff
152 lines
4.1 KiB
Diff
--- ./pom/pom.6.orig 2001-08-29 10:11:31.000000000 -0500
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+++ ./pom/pom.6 2006-09-08 19:36:28.000000000 -0500
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@@ -33,7 +33,7 @@
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.\"
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.\" @(#)pom.6 8.1 (Berkeley) 5/31/93
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.\"
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-.Dd January 9, 1999
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+.Dd September 8, 2006
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.Dt POM 6
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.Os
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.Sh NAME
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@@ -41,7 +41,8 @@
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.Nd display the phase of the moon
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.Sh SYNOPSIS
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.Nm
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-.Op [[[[[cc]yy]mm]dd]HH]
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+.Op Fl d Ar num
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+.Op Ar [[[[cc]yy]mm]dd]HH
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.Sh DESCRIPTION
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The
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.Nm
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@@ -49,6 +50,13 @@
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Useful for selecting software completion target dates and predicting
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managerial behavior.
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.Pp
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+.Bl -tag -width [-d num]
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+.It Ar [-d num]
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+Display the percentage with
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+.Ar num
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+decimals (within reasonable limits).
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+The default is to display an integer percentage.
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+.El
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.Bl -tag -width [[[[[cc]yy]mm]dd]HH]
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.It Ar [[[[[cc]yy]mm]dd]HH]
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Display the phase of the moon for a given time. The format is similar to
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@@ -67,6 +75,9 @@
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.Pp
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This program does not allow for the difference between the TDT and
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UTC timescales (about one minute at the time of writing).
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+.Sh NOTES
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+.Nm
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+recognizes 3321 as being within reasonable limits.
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.Sh ACKNOWLEDGEMENTS
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This program is based on algorithms from
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.%B Practical Astronomy with Your Calculator, Third Edition
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--- ./pom/pom.c.orig 2000-08-03 19:12:33.000000000 -0500
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+++ ./pom/pom.c 2006-09-08 19:47:09.000000000 -0500
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@@ -59,11 +59,14 @@
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*
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* Updated to the Third Edition of Duffett-Smith's book, Paul Janzen, IX 1998
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*
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+ * Modified for Slackware by Eric Hameleers <alien@slackware.com> 09-09-2006
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+ *
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*/
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#include <ctype.h>
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#include <err.h>
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#include <math.h>
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+#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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@@ -101,16 +104,36 @@
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char *argv[];
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{
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time_t tmpt, now;
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- double days, today, tomorrow;
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+ double days, today, tomorrow, accuracy;
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char buf[1024];
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+ int ch, decimals=0;
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/* Revoke setgid privileges */
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setregid(getgid(), getgid());
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+ while ((ch = getopt(argc, argv, "d:h?")) != -1)
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+ switch (ch) {
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+ case 'd':
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+ decimals = atoi(optarg);
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+ if (decimals < 0 || (decimals != 3321 && decimals > __DBL_DIG__))
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+ errx(1, "illegal argument for -d option");
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+ break;
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+ case 'h':
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+ case '?':
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+ (void)fprintf(stderr, "usage: pom [-d digits] [[[[[cc]yy]mm]dd]HH]\n");
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+ exit(1);
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+ default:
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+ break;
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+ }
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+ argc -= optind;
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+ argv += optind;
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+
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+ accuracy = ( decimals == 3321 ? 0.5: 0.5 / pow(10, decimals) );
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+
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if (time(&now) == (time_t)-1)
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err(1, "time");
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- if (argc > 1) {
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- tmpt = parsetime(argv[1]);
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+ if (argc > 0) {
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+ tmpt = parsetime(argv[0]);
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strftime(buf, sizeof(buf), "%a %Y %b %e %H:%M:%S (%Z)",
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localtime(&tmpt));
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printf("%s: ", buf);
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@@ -118,15 +141,20 @@
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tmpt = now;
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}
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days = (tmpt - EPOCH_MINUS_1970 * 86400) / 86400.0;
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- today = potm(days) + .5;
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+ today = potm(days) + accuracy;
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if (tmpt < now)
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(void)printf("The Moon was ");
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else if (tmpt == now)
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(void)printf("The Moon is ");
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else
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(void)printf("The Moon will be ");
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- if ((int)today == 100)
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+ if ((int)today == 100) {
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(void)printf("Full\n");
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+ if (decimals == 3321)
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+ /* (void)printf("Howl!!! Know me, I am PJV.\n"); */
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+ /* PJV's number is not 3321, and shan't be revealed here */
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+ (void)printf("I saw the best minds of my generation destroyed by\n");
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+ }
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else if (!(int)today)
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(void)printf("New\n");
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else {
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@@ -134,19 +162,19 @@
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if ((int)today == 50)
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(void)printf("%s\n", tomorrow > today ?
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"at the First Quarter" : "at the Last Quarter");
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- /* today is 0.5 too big, but it doesn't matter here
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- * since the phase is changing fast enough
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+ /* today is "accuracy" too big, but it doesn't matter
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+ * here since the phase is changing fast enough
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*/
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else {
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- today -= 0.5; /* Now it might matter */
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+ today -= accuracy; /* Now it might matter */
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(void)printf("%s ", tomorrow > today ?
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"Waxing" : "Waning");
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if (today > 50)
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- (void)printf("Gibbous (%1.0f%% of Full)\n",
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- today);
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+ (void)printf("Gibbous (%1.*f%% of Full)\n",
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+ decimals, today);
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else if (today < 50)
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- (void)printf("Crescent (%1.0f%% of Full)\n",
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- today);
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+ (void)printf("Crescent (%1.*f%% of Full)\n",
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+ decimals, today);
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}
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}
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exit(0);
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