1 files changed, 82 insertions, 0 deletions

diff --git a/src/regress/lib/libc/dirname/dirname_test.c b/src/regress/lib/libc/dirname/dirname_test.c
new file mode 100644
index 0000000000..7d0b0e221f
--- /dev/null
+++ b/src/regress/lib/libc/dirname/dirname_test.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2007 Bret S. Lambert <blambert@gsipt.net>
+ *
+ * Public domain.
+ */
+
+#include <sys/param.h>
+
+#include <libgen.h>
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+#include <errno.h>
+
+int
+main(void)
+{
+        char path[2 * MAXPATHLEN];
+        char dname[128];
+        const char *dir = "junk";
+        const char *fname = "/file.name.ext";
+        char *str;
+        int i;
+
+        /* Test normal functioning */
+        strlcpy(path, "/", sizeof(path));
+        strlcpy(dname, "/", sizeof(dname));
+        strlcat(path, dir, sizeof(path)); 
+        strlcat(dname, dir, sizeof(dname)); 
+        strlcat(path, fname, sizeof(path));
+        str = dirname(path);
+        if (strcmp(str, dname) != 0)
+                goto fail;
+
+        /*
+         * There are four states that require special handling:
+         *
+         * 1) path is NULL
+         * 2) path is the empty string
+         * 3) path is composed entirely of slashes
+         * 4) the resulting name is larger than MAXPATHLEN
+         *
+         * The first two cases require that a pointer
+         * to the string "." be returned.
+         *
+         * The third case requires that a pointer
+         * to the string "/" be returned.
+         *
+         * The final case requires that NULL be returned
+         * and errno * be set to ENAMETOOLONG.
+         */
+        /* Case 1 */
+        str = dirname(NULL);
+        if (strcmp(str, ".") != 0)
+                goto fail;
+
+        /* Case 2 */
+        strlcpy(path, "", sizeof(path));
+        str = dirname(path);
+        if (strcmp(str, ".") != 0)
+                goto fail;
+
+        /* Case 3 */
+        for (i = 0; i < MAXPATHLEN - 1; i++)
+                strlcat(path, "/", sizeof(path));       /* path cleared above */
+        str = dirname(path);
+        if (strcmp(str, "/") != 0)
+                goto fail;
+
+        /* Case 4 */
+        strlcpy(path, "/", sizeof(path));               /* reset path */
+        for (i = 0; i <= MAXPATHLEN; i += sizeof(dir))
+                strlcat(path, dir, sizeof(path));
+        strlcat(path, fname, sizeof(path));
+        str = dirname(path);
+        if (str != NULL || errno != ENAMETOOLONG)
+                goto fail;
+
+        return (0);
+fail:
+        return (1);
+}