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#include <u.h>
#include <libc.h>
enum {
Nsec = 1000*1000*1000,
};
void
usage(void)
{
fprint(2, "usage: date [-itunm] [-f fmt] [seconds]\n");
exits("usage");
}
void
main(int argc, char *argv[])
{
int nflg, uflg;
char *fmt;
vlong s, ns;
Tzone *tz;
Tm tm;
nflg = 0;
uflg = 0;
tz = nil;
fmt = "WW MMM _D hh:mm:ss ZZZ YYYY";
tmfmtinstall();
ARGBEGIN{
case 'n': nflg = 1; break;
case 'u': uflg = 1; break;
case 't': fmt = "YYYY-MM-DDThh:mm:ssZZ"; break;
case 'i': fmt = "YYYY-MM-DD"; break;
case 'm': fmt = "WW, DD MMM YYYY hh:mm:ss Z"; break;
case 'f': fmt = EARGF(usage()); break;
default: usage();
}ARGEND
s = 0;
ns = 0;
switch(argc) {
case 0:
ns = nsec();
s = ns/Nsec;
ns = ns%Nsec;
break;
case 1:
s = strtoll(argv[0], nil, 0);
ns = 0;
break;
default:
usage();
break;
}
if(!uflg && (tz = tzload("local")) == nil)
sysfatal("timezone: %r");
if(tmtimens(&tm, s, ns, tz) == nil)
sysfatal("now: %r");
if(nflg)
print("%lld\n", tmnorm(&tm));
else
if(print("%τ\n", tmfmt(&tm, fmt)) == -1)
sysfatal("%r");
exits(0);
}
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