r16017: Add Samba4 replacement for timegm to work

on Solaris.
Jeremy.
(This used to be commit b65c6468651282879a39fa8029c190f2d1a91a28)

3 files changed, 73 insertions, 26 deletions

diff --git a/source3/Makefile.in b/source3/Makefile.in
index fa9af249e0..55cafee509 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -204,7 +204,7 @@ RPC_PARSE_OBJ0 = rpc_parse/parse_prs.o rpc_parse/parse_misc.o
 
 LIB_OBJ = $(VERSION_OBJ) lib/charcnv.o lib/debug.o lib/fault.o \
           lib/getsmbpass.o lib/interface.o lib/md4.o \
-          lib/interfaces.o lib/pidfile.o lib/replace.o lib/replace1.o lib/repdir.o \
+          lib/interfaces.o lib/pidfile.o lib/replace.o lib/replace1.o lib/repdir.o lib/timegm.o \
           lib/signal.o lib/system.o lib/sendfile.o lib/time.o \
 	  lib/ufc.o lib/genrand.o lib/username.o \
 	  lib/util_pw.o lib/access.o lib/smbrun.o \
@@ -595,7 +595,7 @@ CUPS_OBJ = client/smbspool.o $(PARAM_OBJ) $(LIBSMB_OBJ) \
 MOUNT_OBJ = client/smbmount.o \
              $(PARAM_OBJ) $(LIBSMB_OBJ) $(KRBCLIENT_OBJ) $(LIB_NONSMBD_OBJ) $(SECRETS_OBJ)
 
-MNT_OBJ = client/smbmnt.o lib/replace.o $(VERSION_OBJ) $(SNPRINTF_OBJ) @SOCKWRAP@
+MNT_OBJ = client/smbmnt.o lib/replace.o lib/timegm.o $(VERSION_OBJ) $(SNPRINTF_OBJ) @SOCKWRAP@
 
 UMOUNT_OBJ = client/smbumount.o  @SOCKWRAP@
 
diff --git a/source3/lib/replace.c b/source3/lib/replace.c
index 120fd3a468..9ef3503d39 100644
--- a/source3/lib/replace.c
+++ b/source3/lib/replace.c
@@ -434,27 +434,3 @@ char *rep_inet_ntoa(struct in_addr ip)
 }
 #endif /* HAVE_SYSLOG */
 #endif /* HAVE_VSYSLOG */
-
-
-#ifndef HAVE_TIMEGM
-/*
-  yes, I know this looks insane, but its really needed. The function in the 
-  Linux timegm() manpage does not work on solaris.
-*/
- time_t timegm(struct tm *tm) 
-{
-	struct tm tm2, tm3;
-	time_t t;
-
-	tm2 = *tm;
-
-	t = mktime(&tm2);
-	tm3 = *localtime(&t);
-	tm2 = *tm;
-	tm2.tm_isdst = tm3.tm_isdst;
-	t = mktime(&tm2);
-	t -= get_time_zone(t);
-
-	return t;
-}
-#endif
diff --git a/source3/lib/timegm.c b/source3/lib/timegm.c
new file mode 100644
index 0000000000..0e42a863d3
--- /dev/null
+++ b/source3/lib/timegm.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 1997 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * 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. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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. 
+ */
+
+/*
+  adapted for Samba4 by Andrew Tridgell
+*/
+
+#include "includes.h"
+
+#ifndef HAVE_TIMEGM
+
+static int is_leap(unsigned y)
+{
+	y += 1900;
+	return (y % 4) == 0 && ((y % 100) != 0 || (y % 400) == 0);
+}
+
+time_t timegm(struct tm *tm)
+{
+	static const unsigned ndays[2][12] ={
+		{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
+		{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}};
+	time_t res = 0;
+	unsigned i;
+	
+	for (i = 70; i < tm->tm_year; ++i)
+		res += is_leap(i) ? 366 : 365;
+	
+	for (i = 0; i < tm->tm_mon; ++i)
+		res += ndays[is_leap(tm->tm_year)][i];
+	res += tm->tm_mday - 1;
+	res *= 24;
+	res += tm->tm_hour;
+	res *= 60;
+	res += tm->tm_min;
+	res *= 60;
+	res += tm->tm_sec;
+	return res;
+}
+
+#endif /* HAVE_TIMEGM */