roken: add mkostemp()

cf/roken-frag.m4

@@ -194,6 +194,7 @@ AC_CHECK_FUNCS([				\
 	getspnam				\
 	issetugid				\
 	memmem					\
+	mkostemp				\
 	on_exit					\
 	poll					\
 	random					\

lib/roken/Makefile.am

@@ -105,6 +105,7 @@ libroken_la_SOURCES =		\
 	memmem.c		\
 	mini_inetd.c		\
 	mkdir.c                 \
+	mkostemp.c              \
 	net_read.c		\
 	net_write.c		\
 	parse_bytes.c		\

lib/roken/NTMakefile

@@ -78,6 +78,7 @@ libroken_la_OBJS =			\
 	$(OBJ)\mkdir.obj                \
 	$(OBJ)\mini_inetd.obj		\
 	$(OBJ)\mkstemp.obj		\
+	$(OBJ)\mkostemp.obj		\
 	$(OBJ)\net_read.obj		\
 	$(OBJ)\net_write.obj		\
 	$(OBJ)\parse_bytes.obj		\

lib/roken/mkostemp.c

@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2019 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.
+ */
+
+#include <config.h>
+
+#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <errno.h>
+
+#include <roken.h>
+
+#ifndef O_APPEND
+#define O_APPEND 0
+#endif
+#ifndef O_CLOEXEC
+#define O_CLOEXEC 0
+#endif
+#ifndef O_SYNC
+#define O_SYNC 0
+#endif
+
+#ifndef HAVE_MKOSTEMP
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+mkostemp(char *template, int flags)
+{
+    int fd = mkstemp(template);
+
+    if (flags == 0)
+        return fd;
+
+    if ((flags & O_CLOEXEC))
+        rk_cloexec(fd);
+
+    /* fcntl F_SETFL O_APPEND and O_SYNC. */
+#ifdef HAVE_FCNTL
+    if ((flags & (O_APPEND | O_SYNC))) {
+        int fl;
+
+        if ((fl = fcntl(fd, F_GETFL)) == -1 ||
+            fcntl(fd, F_SETFD, fl | (flags & (O_APPEND | O_SYNC))) == -1) {
+            int save_errno = errno;
+
+            (void) unlink(template);
+            (void) close(fd);
+            errno = save_errno;
+            return -1;
+        }
+    }
+#endif
+    return fd;
+}
+#endif

lib/roken/roken.h.in

@@ -703,6 +703,11 @@ ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL lstat(const char *, struct stat *);
 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL mkstemp(char *);
 #endif
 
+#ifndef HAVE_MKOSTEMP
+#define mkostemp rk_mkostemp
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL mkostemp(char *, int);
+#endif
+
 #ifndef HAVE_CGETENT
 #define cgetent rk_cgetent
 #define cgetstr rk_cgetstr

lib/roken/version-script.map

@@ -86,6 +86,7 @@ HEIMDAL_ROKEN_2.0 {
 		rk_memmem;
 		rk_memset_s;
 		rk_mkdir;
+		rk_mkostemp;
 		rk_mkstemp;
 		rk_parse_flags;
 		rk_parse_time;