Date: Wed, 11 Aug 2004 10:44:34 +0200 (MEST) From: Mipam <mipam@ibb.net> To: Giorgos Keramidas <keramida@ceid.upatras.gr> Cc: freebsd-questions@freebsd.org Subject: Re: localtime question Message-ID: <Pine.BSO.4.56.0408111039230.11899@ux11.ltcm.net> In-Reply-To: <20040810171119.GA26303@orion.daedalusnetworks.priv> References: <Pine.BSO.4.56.0408101646230.26666@ux11.ltcm.net><20040810162612 .GC25389@orion.daedalusnetworks.priv><Pine.BSO.4.56.0408101842210.21307@ux1 1.ltcm.net> <20040810171119.GA26303@orion.daedalusnetworks.priv>
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[SNIP]
> You'd have to use strftime() and a local buffer for that.
I found an example and adjusted it:
#include <time.h>
#include <stdio.h>
int main()
{
struct tm *ptr;
time_t tm;
char str[60];
char str2[60];
char str3[60];
tm = time(NULL)-86400;
ptr = localtime(&tm);
strftime(str ,100 , "%d",ptr);
strftime(str2 ,100 , "%m",ptr);
strftime(str3 ,100 , "%Y",ptr);
printf("%s %s %s\n",str3,str2,str);
return 0;
}
This runs just fine: 2004 08 10
I dont know what the 100 is good for?
I changed the first according your advice:
#include <sys/time.h>
#include <err.h>
#include <stdio.h>
int main(void)
{
struct timeval tv;
struct timeval tv_current;
if (gettimeofday(&tv_current, NULL) == -1)
err(1, "Could not get local time of day");
tv.tv_sec = tv_current.tv_sec-86400;
printf("%s", ctime((const time_t *) &tv.tv_sec));
/* printf("%s\n", ctime(&tv.tv_sec)); */
return 0;
}
Output: Tue Aug 10 10:42:26 2004
I compiled both with: cc -O3 -mcpu=pentiumpro -o time time.c
Both compile without errors.
Bye,
Mipam.
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