ref: ed9fdc72f519553f9c8f1f221f97bd5919847caa
dir: /sys/src/cmd/auth/lib/getexpiration.c/
#include <u.h>
#include <libc.h>
#include <ctype.h>
#include <bio.h>
#include <authsrv.h>
#include "authcmdlib.h"
/*
* get the date in the format yyyymmdd
*/
Tm
getdate(char *d)
{
Tm date;
int i;
memset(&date, 0, sizeof(date));
for(i = 0; i < 8; i++)
if(!isdigit(d[i]))
return date;
date.year = (d[0]-'0')*1000 + (d[1]-'0')*100 + (d[2]-'0')*10 + d[3]-'0';
date.year -= 1900;
d += 4;
date.mon = (d[0]-'0')*10 + d[1]-'0' - 1;
d += 2;
date.mday = (d[0]-'0')*10 + d[1]-'0';
return date;
}
long
getexpiration(char *db, char *u)
{
char buf[Maxpath];
char *cdate;
Tm date;
ulong secs, now;
int n, fd;
/* read current expiration (if any) */
snprint(buf, sizeof buf, "%s/%s/expire", db, u);
fd = open(buf, OREAD);
buf[0] = 0;
if(fd >= 0){
n = read(fd, buf, sizeof(buf)-1);
if(n > 0)
buf[n-1] = 0;
close(fd);
}
if(buf[0]){
if(strncmp(buf, "never", 5)){
secs = atoi(buf);
memmove(&date, localtime(secs), sizeof(date));
sprint(buf, "%4.4d%2.2d%2.2d", date.year+1900, date.mon+1, date.mday);
} else
buf[5] = 0;
} else
strcpy(buf, "never");
for(;;free(cdate)){
cdate = readcons("Expiration date (YYYYMMDD or never)", buf, 0);
if(cdate == nil || *cdate == 0){
secs = -1;
break;
}
if(strcmp(cdate, "never") == 0){
secs = 0;
break;
}
date = getdate(cdate);
secs = tm2sec(&date);
now = time(0);
if(secs > now && secs < now + 2*365*24*60*60)
break;
print("expiration time must fall between now and 2 years from now\n");
}
free(cdate);
return secs;
}