ref: 50791b875552b0dc5748aa67c95776736f6ff4b7
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 = strtoul(buf, nil, 10); 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; }