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

[Greg Reagle]

---
 cal.1 |  5 +++++
 cal.c | 11 ++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/cal.1 b/cal.1
index a679350..aebd992 100644
--- a/cal.1
+++ b/cal.1
@@ -29,6 +29,11 @@ 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).
+If
+.IR year
+is given without
+.IR month
+print the whole year, unless overridden by options.
 .SH OPTIONS
 .TP
 .B \-1
diff --git a/cal.c b/cal.c
index 28e58fe..8b04e56 100644
--- a/cal.c
+++ b/cal.c
@@ -122,7 +122,7 @@ main(int argc, char *argv[])
        fday = 0;
 
        ncols = 3;
-       nmons = 1;
+       nmons = 0;
 
        ARGBEGIN {
        case '1':
@@ -159,6 +159,15 @@ main(int argc, char *argv[])
                usage();
        } ARGEND;
 
+       if (nmons == 0) {
+               if (argc == 1) {
+                       month = 1;
+                       nmons = 12;
+               } else {
+                       nmons = 1;
+               }
+       }
+
        switch (argc) {
        case 3:
                day = estrtol(argv[0], 0);
-- 
2.2.1