ref: bc7d74f09b53c39ada4e73ce73c01c6c0928f9f4
dir: /sys/src/cmd/date.c/
#include <u.h>
#include <libc.h>
int uflg, nflg;
void
main(int argc, char *argv[])
{
ulong now;
ARGBEGIN{
case 'n': nflg = 1; break;
case 'u': uflg = 1; break;
default: fprint(2, "usage: date [-un] [seconds]\n"); exits("usage");
}ARGEND
if(argc == 1)
now = strtoul(*argv, 0, 0);
else
now = time(0);
if(nflg)
print("%ld\n", now);
else if(uflg)
print("%s", asctime(gmtime(now)));
else
print("%s", ctime(now));
exits(0);
}