bc: convert to "G trick" - this returns bc to zero bss increase

[oweals/busybox.git] / coreutils / sleep.c

diff --git a/coreutils/sleep.c b/coreutils/sleep.c
index 13f07c02feab2990cb1b601109e756f9d9486e23..126665839a2a6dea284e0357c76c29d98dfe15d1 100644 (file)
--- a/coreutils/sleep.c
+++ b/coreutils/sleep.c
@@ -1,44 +1,86 @@
 /* vi: set sw=4 ts=4: */
 /*
- * Mini sleep implementation for busybox
+ * sleep implementation for busybox
  *
+ * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
  *
- * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
- *
- * This program 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 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
  *
+ * Rewritten to do proper arg and error checking.
+ * Also, added a 'fancy' configuration to accept multiple args with
+ * time suffixes for seconds, minutes, hours, and days.
  */
+//config:config SLEEP
+//config:      bool "sleep (1.7 kb)"
+//config:      default y
+//config:      help
+//config:      sleep is used to pause for a specified number of seconds.
+//config:      It comes in 3 versions:
+//config:      - small: takes one integer parameter
+//config:      - fancy: takes multiple integer arguments with suffixes:
+//config:              sleep 1d 2h 3m 15s
+//config:      - fancy with fractional numbers:
+//config:              sleep 2.3s 4.5h sleeps for 16202.3 seconds
+//config:      Last one is "the most compatible" with coreutils sleep,
+//config:      but it adds around 1k of code.
+//config:
+//config:config FEATURE_FANCY_SLEEP
+//config:      bool "Enable multiple arguments and s/m/h/d suffixes"
+//config:      default y
+//config:      depends on SLEEP
+//config:      help
+//config:      Allow sleep to pause for specified minutes, hours, and days.
 
-#include "internal.h"
-#include <stdio.h>
+/* Do not make this applet NOFORK. It breaks ^C-ing of pauses in shells */
+//applet:IF_SLEEP(APPLET(sleep, BB_DIR_BIN, BB_SUID_DROP))
 
-const char sleep_usage[] = "sleep N\n" 
-#ifndef BB_FEATURE_TRIVIAL_HELP
-       "\nPause for N seconds.\n"
-#endif
-       ;
+//kbuild:lib-$(CONFIG_SLEEP) += sleep.o
+
+/* BB_AUDIT SUSv3 compliant */
+/* BB_AUDIT GNU issues -- fancy version matches except args must be ints. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html */
 
-extern int sleep_main(int argc, char **argv)
+//usage:#define sleep_trivial_usage
+//usage:       IF_FEATURE_FANCY_SLEEP("[") "N" IF_FEATURE_FANCY_SLEEP("]...")
+//usage:#define sleep_full_usage "\n\n"
+//usage:       IF_NOT_FEATURE_FANCY_SLEEP("Pause for N seconds")
+//usage:       IF_FEATURE_FANCY_SLEEP(
+//usage:       "Pause for a time equal to the total of the args given, where each arg can\n"
+//usage:       "have an optional suffix of (s)econds, (m)inutes, (h)ours, or (d)ays")
+//usage:
+//usage:#define sleep_example_usage
+//usage:       "$ sleep 2\n"
+//usage:       "[2 second delay results]\n"
+//usage:       IF_FEATURE_FANCY_SLEEP(
+//usage:       "$ sleep 1d 3h 22m 8s\n"
+//usage:       "[98528 second delay results]\n")
+
+#include "libbb.h"
+
+int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int sleep_main(int argc UNUSED_PARAM, char **argv)
 {
-       if ((argc < 2) || (**(argv + 1) == '-')) {
-               usage(sleep_usage);
-       }
-
-       if (sleep(atoi(*(++argv))) != 0) {
-               perror("sleep");
-               exit(FALSE);
-       } else
-               exit(TRUE);
+       duration_t duration;
+
+       ++argv;
+       if (!*argv)
+               bb_show_usage();
+
+#if ENABLE_FEATURE_FANCY_SLEEP
+# if ENABLE_FLOAT_DURATION
+       /* undo busybox.c setlocale */
+       setlocale(LC_NUMERIC, "C");
+# endif
+       duration = 0;
+       do {
+               duration += parse_duration_str(*argv);
+       } while (*++argv);
+       sleep_for_duration(duration);
+#else /* simple */
+       duration = xatou(*argv);
+       sleep(duration);
+#endif
+       return EXIT_SUCCESS;
 }