[hackers] [sbase] If only the year operand is given, cal shall produce a calendar for all twelve months in the given calendar year. || Greg Reagle

[git]

commit efac15726bcd43ed7cef96676a75672be6fb4a0e
Author: Greg Reagle <greg.rea...@umbc.edu>
Date:   Thu Jan 8 14:21:37 2015 -0500

    If only the year operand is given, cal shall produce a calendar for all 
twelve months in the given calendar year.

diff --git a/cal.1 b/cal.1
index 8619460..da9c102 100644
--- a/cal.1
+++ b/cal.1
@@ -28,7 +28,13 @@ of calendars side by side. Each row of calendars contains at 
most
 .IR columns
 number of calendars. The defaults are obtained using
 .IR localtime (3).
-The Julian calendar is used through Sep 2, 1752, and the Gregorian calendar is 
used starting the next day with Sep 14, 1752.
+If
+.IR year
+is given without
+.IR month
+print the whole year, unless overridden by options.  The Julian calendar is 
used
+through Sep 2, 1752, and the Gregorian calendar is used starting the next day
+with Sep 14, 1752.
 .SH OPTIONS
 .TP
 .B \-1
diff --git a/cal.c b/cal.c
index 8d6dda0..52c2f6d 100644
--- a/cal.c
+++ b/cal.c
@@ -146,7 +146,7 @@ main(int argc, char *argv[])
        fday = 0;
 
        ncols = 3;
-       nmons = 1;
+       nmons = 0;
 
        ARGBEGIN {
        case '1':
@@ -183,6 +183,15 @@ main(int argc, char *argv[])
                usage();
        } ARGEND;
 
+       if (nmons == 0) {
+               if (argc == 1) {
+                       month = 1;
+                       nmons = 12;
+               } else {
+                       nmons = 1;
+               }
+       }
+
        switch (argc) {
        case 2:
                month = estrtol(argv[0], 0);