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-rw-r--r--examples/loadables/strftime.c125
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diff --git a/examples/loadables/strftime.c b/examples/loadables/strftime.c
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+/* strftime - loadable builtin interface to strftime(3) */
+
+/* See Makefile for compilation details. */
+
+/*
+ Copyright (C) 1999-2009 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 "bashtypes.h"
+#include "posixtime.h"
+
+#include <stdio.h>
+
+#include "builtins.h"
+#include "shell.h"
+#include "common.h"
+
+int
+strftime_builtin (list)
+ WORD_LIST *list;
+{
+ char *format, *tbuf;
+ size_t tbsize, tsize;
+ time_t secs;
+ struct tm *t;
+ int n;
+ intmax_t i;
+
+ if (list == 0)
+ {
+ builtin_usage ();
+ return (EX_USAGE);
+ }
+
+ if (no_options (list))
+ return (EX_USAGE);
+
+ format = list->word->word;
+ if (format == 0 || *format == 0)
+ {
+ printf ("\n");
+ return (EXECUTION_SUCCESS);
+ }
+
+ list = list->next;
+
+ if (list && list->word->word)
+ {
+ n = legal_number (list->word->word, &i);
+ if (n == 0 || i < 0 || i != (time_t)i)
+ {
+ sh_invalidnum (list->word->word);
+ return (EXECUTION_FAILURE);
+ }
+ else
+ secs = i;
+ }
+ else
+ secs = NOW;
+
+ t = localtime (&secs);
+
+ tbsize = strlen (format) * 4;
+ tbuf = 0;
+
+ /* Now try to figure out how big the buffer should really be. strftime(3)
+ will return the number of bytes placed in the buffer unless it's greater
+ than MAXSIZE, in which case it returns 0. */
+ for (n = 1; n < 4; n++)
+ {
+ tbuf = xrealloc (tbuf, tbsize * n);
+ tsize = strftime (tbuf, tbsize * n, format, t);
+ if (tsize)
+ break;
+ }
+
+ printf ("%s\n", tbuf);
+ free (tbuf);
+
+ return (EXECUTION_SUCCESS);
+}
+
+/* An array of strings forming the `long' documentation for a builtin xxx,
+ which is printed by `help xxx'. It must end with a NULL. */
+char *strftime_doc[] = {
+ "Display formatted time.",
+ "",
+ "Converts date and time format to a string and displays it on the",
+ "standard output. If the optional second argument is supplied, it",
+ "is used as the number of seconds since the epoch to use in the",
+ "conversion, otherwise the current time is used.",
+ (char *)NULL
+};
+
+/* The standard structure describing a builtin command. bash keeps an array
+ of these structures. The flags must include BUILTIN_ENABLED so the
+ builtin can be used. */
+struct builtin strftime_struct = {
+ "strftime", /* builtin name */
+ strftime_builtin, /* function implementing the builtin */
+ BUILTIN_ENABLED, /* initial flags for builtin */
+ strftime_doc, /* array of long documentation strings. */
+ "strftime format [seconds]", /* usage synopsis; becomes short_doc */
+ 0 /* reserved for internal use */
+};