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-rw-r--r--examples/loadables/basename.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/examples/loadables/basename.c b/examples/loadables/basename.c
new file mode 100644
index 0000000..7f254c7
--- /dev/null
+++ b/examples/loadables/basename.c
@@ -0,0 +1,108 @@
+/* basename - return nondirectory portion of pathname */
+
+/* See Makefile for compilation details. */
+
+#include "config.h"
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include "builtins.h"
+#include "shell.h"
+
+basename_builtin (list)
+ WORD_LIST *list;
+{
+ int slen, sufflen, off;
+ char *string, *suffix, *fn;
+
+ if (list == 0)
+ {
+ builtin_usage ();
+ return (EX_USAGE);
+ }
+
+ if (no_options (list))
+ 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[] = {
+ "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 */
+};