From 0efee1f5208a3622d47f31fcdede8f15e828a953 Mon Sep 17 00:00:00 2001
From: Edward Emelianov <eddy@sao.ru>
Date: Thu, 24 Mar 2022 12:19:48 +0300
Subject: [PATCH] changes with 'sun'

---
 Auxiliary_utils/Sun/Readme | 9 ---------
 Auxiliary_utils/Sun/sun.c  | 7 ++++---
 2 files changed, 4 insertions(+), 12 deletions(-)
 delete mode 100644 Auxiliary_utils/Sun/Readme

diff --git a/Auxiliary_utils/Sun/Readme b/Auxiliary_utils/Sun/Readme
deleted file mode 100644
index 289ec28..0000000
--- a/Auxiliary_utils/Sun/Readme
+++ /dev/null
@@ -1,9 +0,0 @@
-Calculates times of sunrise, sunset and noon, gives @ stdout just UNIX time of event
-
-Sunrise/sunset - for particular angle below horizon (default: -18degr).
-
-Usage: 
-
-- just `noon`, `sunrise` or `sunset` for default angles;
-- `sunrise/sunset angle` for `angle` in degrees below horizon;
-- `sunrise/sunset "standard"|"civil"|"nautic"|"astro" - calculates event for -0.833degr, -6degr, -12degr and -18degr.
diff --git a/Auxiliary_utils/Sun/sun.c b/Auxiliary_utils/Sun/sun.c
index f3246db..6d3f1fc 100644
--- a/Auxiliary_utils/Sun/sun.c
+++ b/Auxiliary_utils/Sun/sun.c
@@ -21,6 +21,7 @@ A simple example showing some solar calculations.
 */
 
 #include <ctype.h>
+#include <errno.h>
 #include <libgen.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -53,7 +54,7 @@ int main (int argc, char **argv){
         }
     }else if(argc > 2){
         fprintf(stderr, "Usage: %s [positive angle in degr] OR %s [\"standard\"|\"civil\"|\"nautic\"|\"astro\"]\n",
-                argv[0], argv[0]);
+                program_invocation_short_name, program_invocation_short_name);
         return 1;
     }
 
@@ -62,9 +63,9 @@ int main (int argc, char **argv){
     JD = ln_get_julian_from_sys();
     ln_get_solar_equ_coords (JD, &equ);
     if(ln_get_solar_rst_horizon(JD, &observer, angle, &rst) == 1) return 1;
-    if(strcasecmp(basename(argv[0]), "sunrise") == 0)
+    if(strcasecmp(program_invocation_short_name, "sunrise") == 0)
         ln_get_timet_from_julian(rst.rise, &t);
-    else if(strcasecmp(basename(argv[0]), "sunset") == 0)
+    else if(strcasecmp(program_invocation_short_name, "sunset") == 0)
         ln_get_timet_from_julian(rst.set, &t);
     else
         ln_get_timet_from_julian(rst.transit, &t);