add strlcpy compatibility file for non-openbsd

Makefile

@@ -1,6 +1,6 @@
 include config.mk
 
-SRC = main.c xml.c parse.c save.c
+SRC = main.c xml.c parse.c save.c strlcpy.c
 OBJ = ${SRC:.c=.o}
 
 all: rssdl

README

@@ -10,7 +10,7 @@ from Yoran Heling.
 
 Dependencies
 ------------
-- C89 compatible compiler
+- C99 compatible compiler
 - POSIX-compliant libc
 - a way to pipe the feed data to rssdl
 

config.mk

@@ -2,8 +2,8 @@
 PREFIX = ~/.local
 
 # flags
-#CPPFLAGS = -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=500
-CFLAGS = -static -g -O3 -std=c89 -Wall -Wextra -Wshadow -pedantic -pedantic-errors -Wno-unused-parameter
+CPPFLAGS = -D_XOPEN_SOURCE=500
+CFLAGS = -static -g -O3 -std=c99 -Wall -Wextra -Wshadow -pedantic -pedantic-errors -Wno-unused-parameter
 
 # compiler/linker
 CC = cc

parse.c

@@ -6,6 +6,9 @@
 #include "parse.h"
 #include "save.h"
 #include "xml.h"
+#ifndef OpenBSD
+#include "strlcpy.h"
+#endif
 
 #define istag(name)	strcmp(x->tag, name) == 0
 

strlcpy.c

@@ -0,0 +1,54 @@
+/*	$OpenBSD: strlcpy.c,v 1.16 2019/01/25 00:19:25 millert Exp $	*/
+
+/*
+ * Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef OpenBSD
+
+#include <sys/types.h>
+#include <string.h>
+
+/*
+ * Copy string src to buffer dst of size dsize.  At most dsize-1
+ * chars will be copied.  Always NUL terminates (unless dsize == 0).
+ * Returns strlen(src); if retval >= dsize, truncation occurred.
+ */
+size_t
+strlcpy(char *dst, const char *src, size_t dsize)
+{
+	const char *osrc = src;
+	size_t nleft = dsize;
+
+	/* Copy as many bytes as will fit. */
+	if (nleft != 0) {
+		while (--nleft != 0) {
+			if ((*dst++ = *src++) == '\0')
+				break;
+		}
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src. */
+	if (nleft == 0) {
+		if (dsize != 0)
+			*dst = '\0';		/* NUL-terminate dst */
+		while (*src++)
+			;
+	}
+
+	return(src - osrc - 1);	/* count does not include NUL */
+}
+
+#endif

strlcpy.h

@@ -0,0 +1,3 @@
+#ifndef OpenBSD
+size_t strlcpy(char *, const char *, size_t);
+#endif