bfstd: New wrappers for dirname()/basename()

3 files changed, 65 insertions, 15 deletions

diff --git a/tests/bfstd.c b/tests/bfstd.c
new file mode 100644
index 0000000..4a8181b
--- /dev/null
+++ b/tests/bfstd.c
@@ -0,0 +1,57 @@
+/****************************************************************************
+ * bfs                                                                      *
+ * Copyright (C) 2022 Tavian Barnes <tavianator@tavianator.com>             *
+ *                                                                          *
+ * Permission to use, copy, modify, and/or distribute this software for any *
+ * purpose with or without fee is hereby granted.                           *
+ *                                                                          *
+ * 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 "../src/bfstd.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/** Check the result of xdirname()/xbasename(). */
+static void check_base_dir(const char *path, const char *dir, const char *base) {
+	char *xdir = xdirname(path);
+	if (!xdir) {
+		perror("xdirname()");
+		abort();
+	} else if (strcmp(xdir, dir) != 0) {
+		fprintf(stderr, "xdirname(\"%s\") == \"%s\" (!= \"%s\")\n", path, xdir, dir);
+		abort();
+	}
+	free(xdir);
+
+	char *xbase = xbasename(path);
+	if (!xbase) {
+		perror("xbasename()");
+		abort();
+	} else if (strcmp(xbase, base) != 0) {
+		fprintf(stderr, "xbasename(\"%s\") == \"%s\" (!= \"%s\")\n", path, xbase, base);
+		abort();
+	}
+	free(xbase);
+}
+
+int main(void) {
+	// From man 3p basename
+	check_base_dir("usr", ".", "usr");
+	check_base_dir("usr/", ".", "usr");
+	check_base_dir("", ".", ".");
+	check_base_dir("/", "/", "/");
+	// check_base_dir("//", "/" or "//", "/" or "//");
+	check_base_dir("///", "/", "/");
+	check_base_dir("/usr/", "/", "usr");
+	check_base_dir("/usr/lib", "/usr", "lib");
+	check_base_dir("//usr//lib//", "//usr", "lib");
+	check_base_dir("/home//dwc//test", "/home//dwc", "test");
+}
diff --git a/tests/mksock.c b/tests/mksock.c
index d1776b3..5068bc8 100644
--- a/tests/mksock.c
+++ b/tests/mksock.c
@@ -19,8 +19,8 @@
  * program does the job.
  */
 
+#include "../src/bfstd.h"
 #include <errno.h>
-#include <libgen.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
@@ -41,18 +41,13 @@ static void errmsg(const char *cmd, const char *path) {
  * file name is not.
  */
 static int chdir_parent(const char *path) {
-	char *copy = strdup(path);
-	if (!copy) {
+	char *dir = xdirname(path);
+	if (!dir) {
 		return -1;
 	}
-	const char *dir = dirname(copy);
 
 	int ret = chdir(dir);
-
-	int error = errno;
-	free(copy);
-	errno = error;
-
+	free(dir);
 	return ret;
 }
 
@@ -66,22 +61,21 @@ static int init_sun(struct sockaddr_un *sock, const char *path) {
 		return -1;
 	}
 
-	char *copy = strdup(path);
-	if (!copy) {
+	char *base = xbasename(path);
+	if (!base) {
 		return -1;
 	}
-	const char *base = basename(copy);
 
 	len = strlen(base);
 	if (len >= sizeof(sock->sun_path)) {
-		free(copy);
+		free(base);
 		errno = ENAMETOOLONG;
 		return -1;
 	}
 
 	sock->sun_family = AF_UNIX;
 	memcpy(sock->sun_path, base, len + 1);
-	free(copy);
+	free(base);
 	return 0;
 }
 
diff --git a/tests/xtouch.c b/tests/xtouch.c
index 9a91ec7..262fc33 100644
--- a/tests/xtouch.c
+++ b/tests/xtouch.c
@@ -14,7 +14,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           *
  ****************************************************************************/
 
-#include "../src/bfstd.h"
 #include "../src/xtime.h"
 #include <errno.h>
 #include <fcntl.h>