/* $OpenBSD: rcstime.c,v 1.6 2016/08/26 09:02:54 guenther Exp $ */ /* * Copyright (c) 2006 Joris Vink <joris@openbsd.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <err.h> #include <stdlib.h> #include <string.h> #include <time.h> #include "rcs.h" void rcs_set_tz(char *tz, struct rcs_delta *rdp, struct tm *tb) { int tzone; int pos; char *h, *m; const char *errstr; struct tm *ltb; time_t now; if (!strcmp(tz, "LT")) { now = mktime(&rdp->rd_date); ltb = localtime(&now); ltb->tm_hour += ((int)ltb->tm_gmtoff/3600); memcpy(tb, ltb, sizeof(*tb)); } else { pos = 0; switch (*tz) { case '-': break; case '+': pos = 1; break; default: errx(1, "%s: not a known time zone", tz); } h = (tz + 1); if ((m = strrchr(tz, ':')) != NULL) *(m++) = '\0'; memcpy(tb, &rdp->rd_date, sizeof(*tb)); tzone = strtonum(h, -23, 23, &errstr); if (errstr) errx(1, "%s: not a known time zone", tz); if (pos) { tb->tm_hour += tzone; tb->tm_gmtoff += (tzone * 3600); } else { tb->tm_hour -= tzone; tb->tm_gmtoff -= (tzone * 3600); } if ((tb->tm_hour >= 24) || (tb->tm_hour <= -24)) tb->tm_hour = 0; if (m != NULL) { tzone = strtonum(m, 0, 59, &errstr); if (errstr) errx(1, "%s: not a known minute", m); if ((tb->tm_min + tzone) >= 60) { tb->tm_hour++; tb->tm_min -= (60 - tzone); } else tb->tm_min += tzone; tb->tm_gmtoff += (tzone*60); } } }