1 files changed, 131 insertions, 0 deletions
diff --git a/examples/loadables/basename.c b/examples/loadables/basename.c
new file mode 100644
index 0000000..29dd1a6
--- /dev/null
+++ b/examples/loadables/basename.c
@@ -0,0 +1,131 @@
+/* basename - return nondirectory portion of pathname */
+
+/* See Makefile for compilation details. */
+
+/*
+   Copyright (C) 1999-2020 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash.
+   Bash is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Bash is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#if defined (HAVE_UNISTD_H)
+#  include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include "builtins.h"
+#include "shell.h"
+#include "common.h"
+#include "bashgetopt.h"
+
+int
+basename_builtin (list)
+     WORD_LIST *list;
+{
+  int slen, sufflen, off;
+  char *string, *suffix, *fn;
+
+  if (no_options (list))
+    return (EX_USAGE);
+  list = loptend;
+  if (list == 0)
+    {
+      builtin_usage ();
+      return (EX_USAGE);
+    }    
+
+  string = list->word->word;
+  suffix = (char *)NULL;
+  if (list->next)
+    {
+      list = list->next;
+      suffix = list->word->word;
+    }
+
+  if (list->next)
+    {
+      builtin_usage ();
+      return (EX_USAGE);
+    }
+
+  slen = strlen (string);
+
+  /* Strip trailing slashes */
+  while (slen > 0 && string[slen - 1] == '/')
+    slen--;
+
+  /* (2) If string consists entirely of slash characters, string shall be
+	 set to a single slash character.  In this case, skip steps (3)
+	 through (5). */
+  if (slen == 0)
+    {
+      fputs ("/\n", stdout);
+      return (EXECUTION_SUCCESS);
+    }
+
+  /* (3) If there are any trailing slash characters in string, they
+	 shall be removed. */
+  string[slen] = '\0';
+
+  /* (4) If there are any slash characters remaining in string, the prefix
+	 of string up to an including the last slash character in string
+	 shall be removed. */
+  while (--slen >= 0)
+    if (string[slen] == '/')
+      break;
+
+  fn = string + slen + 1;
+
+  /* (5) If the suffix operand is present, is not identical to the
+	 characters remaining in string, and is identical to a suffix
+	 of the characters remaining in string, the suffix suffix
+	 shall be removed from string.  Otherwise, string shall not be
+	 modified by this step. */
+  if (suffix)
+    {
+      sufflen = strlen (suffix);
+      slen = strlen (fn);
+      if (sufflen < slen)
+        {
+          off = slen - sufflen;
+          if (strcmp (fn + off, suffix) == 0)
+            fn[off] = '\0';
+        }
+    }
+  printf ("%s\n", fn);
+  return (EXECUTION_SUCCESS);
+}
+
+char *basename_doc[] = {
+	"Return non-directory portion of pathname.",
+	"",
+	"The STRING is converted to a filename corresponding to the last",
+	"pathname component in STRING.  If the suffix string SUFFIX is",
+	"supplied, it is removed.",
+	(char *)NULL
+};
+
+/* The standard structure describing a builtin command.  bash keeps an array
+   of these structures. */
+struct builtin basename_struct = {
+	"basename",		/* builtin name */
+	basename_builtin,	/* function implementing the builtin */
+	BUILTIN_ENABLED,	/* initial flags for builtin */
+	basename_doc,		/* array of long documentation strings. */
+	"basename string [suffix]",	/* usage synopsis */
+	0			/* reserved for internal use */
+};