ref: 8cbe3772c45431b962971e45581d831772a85947
parent: 0cb4115b8234946b5468f3f0fe29d4c6a94f1026
author: Ori Bernstein <[email protected]'>
date: Fri Sep 6 04:25:21 EDT 2019
Add RFC2822 (email style) formatted dates to to date(1).
--- a/sys/man/1/date
+++ b/sys/man/1/date
@@ -30,6 +30,9 @@
.TP
.B -t
Report the date as ISO-8601 with time and timezone suffix.
+.TP
+.B -m
+Report the date as an email compatible (RFC2822) time stamp.
.PP
The conversion from Greenwich Mean Time to local time depends on the
.B $timezone
--- a/sys/src/cmd/date.c
+++ b/sys/src/cmd/date.c
@@ -1,8 +1,17 @@
#include <u.h>
#include <libc.h>
-int uflg, nflg, iflg, tflg;
+static char *day[] = {+ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
+};
+static char *mon[] = {+ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
+ "Aug", "Sep", "Oct", "Nov", "Dec"
+};
+
+int uflg, nflg, iflg, tflg, mflg;
+
char*
isodate(Tm *t)
{@@ -38,6 +47,23 @@
return d;
}
+char *
+mailtime(Tm *t)
+{+ static char c[64];
+ char *sgn;
+ int off;
+
+ sgn = "+";
+ if(t->tzoff < 0)
+ sgn = "";
+ off = (t->tzoff/3600)*100 + (t->tzoff/60)%60;
+ snprint(c, sizeof(c), "%s, %.2d %s %.4d %.2d:%.2d:%.2d %s%.4d",
+ day[t->wday], t->mday, mon[t->mon], t->year + 1900,
+ t->hour, t->min, t->sec, sgn, off);
+ return c;
+}
+
void
main(int argc, char *argv[])
{@@ -48,7 +74,8 @@
case 'u': uflg = 1; break;
case 't': tflg = 1; /* implies -i */
case 'i': iflg = 1; break;
- default: fprint(2, "usage: date [-itun] [seconds]\n"); exits("usage");+ case 'm': mflg = 1; break;
+ default: fprint(2, "usage: date [-itunm] [seconds]\n"); exits("usage");}ARGEND
if(argc == 1)
@@ -65,7 +92,9 @@
print("%s\n", isotime(tm));else
print("%s\n", isodate(tm));- } else
+ } else if(mflg)
+ print("%s\n", mailtime(tm));+ else
print("%s", asctime(tm));}
exits(0);