Replace asprintf() with strlcpy() and strlcat()

Makefile

@@ -5,7 +5,7 @@ MANPREFIX = $(PREFIX)/man
 #CFLAGS += -g
 LDLIBS = -lncursesw
 
-OBJ = noice.o strlcpy.o
+OBJ = noice.o strlcat.o strlcpy.o
 BIN = noice
 
 all: $(BIN)
@@ -14,6 +14,7 @@ $(BIN): $(OBJ)
 	$(CC) $(CFLAGS) -o $@ $(OBJ) $(LDLIBS)
 
 noice.o: util.h config.h
+strlcat.o: util.h
 strlcpy.o: util.h
 
 install: all

noice.c

@@ -458,13 +458,17 @@ makepath(char *dir, char *name)
 	if (name[0] == '/') {
 		path = xstrdup(name);
 	} else {
+		path = xmalloc(PATH_MAX);
 		/* Handle root case */
-		if (strcmp(dir, "/") == 0)
+		if (strcmp(dir, "/") == 0) {
-			asprintf(&path, "/%s", name);
+			strlcpy(path, "/", PATH_MAX);
-		else
+			strlcat(path, name, PATH_MAX);
-			asprintf(&path, "%s/%s", dir, name);
+		} else {
+			strlcpy(path, dir, PATH_MAX);
+			strlcat(path, "/", PATH_MAX);
+			strlcat(path, name, PATH_MAX);
+		}
 	}
-
 	return path;
 }
 

strlcat.c

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * 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.
+ */
+
+#include <sys/types.h>
+#include <string.h>
+
+#include "util.h"
+
+/*
+ * Appends src to string dst of size siz (unlike strncat, siz is the
+ * full size of dst, not space left). At most siz-1 characters
+ * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
+ * Returns strlen(src) + MIN(siz, strlen(initial dst)).
+ * If retval >= siz, truncation occurred.
+ */
+size_t
+strlcat(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+	size_t dlen;
+	/* Find the end of dst and adjust bytes left but don't go past end */
+	while (n-- != 0 && *d != '\0')
+		d++;
+	dlen = d - dst;
+	n = siz - dlen;
+	if (n == 0)
+		return(dlen + strlen(s));
+	while (*s != '\0') {
+		if (n != 1) {
+			*d++ = *s;
+			n--;
+		}
+		s++;
+	}
+	*d = '\0';
+	return(dlen + (s - src)); /* count does not include NUL */
+}

util.h

@@ -1,2 +1,6 @@
+#include <stdarg.h>
+
+#undef strlcat
+size_t strlcat(char *, const char *, size_t);
 #undef strlcpy
 size_t strlcpy(char *, const char *, size_t);