inetd: comment tweak. no code changes

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

diff --git a/coreutils/sleep.c b/coreutils/sleep.c
index 53fe5a0c2bf8b6085a208ee9c83bb2b53a54c627..b16d03c2bd57fa9772e9c2e535ce462d1b73c006 100644 (file)
--- a/coreutils/sleep.c
+++ b/coreutils/sleep.c
@@ -1,20 +1,106 @@
-#include "internal.h"
-#include <stdio.h>
+/* vi: set sw=4 ts=4: */
+/*
+ * sleep implementation for busybox
+ *
+ * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
 
-const char     sleep_usage[] = " NUMBER\n"
-"Pause for NUMBER seconds.\n";
+/* 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)
+/* 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.
+ */
+
+#include "libbb.h"
+
+/* This is a NOFORK applet. Be very careful! */
+
+
+#if ENABLE_FEATURE_FANCY_SLEEP || ENABLE_FEATURE_FLOAT_SLEEP
+static const struct suffix_mult sfx[] = {
+       { "s", 1 },
+       { "m", 60 },
+       { "h", 60*60 },
+       { "d", 24*60*60 },
+       { }
+};
+#endif
+
+int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int sleep_main(int argc UNUSED_PARAM, char **argv)
 {
-        if ( (argc < 2) || (**(argv+1) == '-') ) {
-           fprintf(stderr, "Usage: %s %s", *argv, sleep_usage);
-           exit(FALSE);
+#if ENABLE_FEATURE_FLOAT_SLEEP
+       double duration;
+       struct timespec ts;
+#else
+       unsigned duration;
+#endif
+
+       ++argv;
+       if (!*argv)
+               bb_show_usage();
+
+#if ENABLE_FEATURE_FLOAT_SLEEP
+
+       duration = 0;
+       do {
+               char *arg = *argv;
+               if (strchr(arg, '.')) {
+                       double d;
+                       char *pp;
+                       int len = strspn(arg, "0123456789.");
+                       char sv = arg[len];
+                       arg[len] = '\0';
+                       errno = 0;
+                       d = strtod(arg, &pp);
+                       if (errno || *pp)
+                               bb_show_usage();
+                       arg[len] = sv;
+                       len--;
+                       sv = arg[len];
+                       arg[len] = '1';
+                       duration += d * xatoul_sfx(&arg[len], sfx);
+                       arg[len] = sv;
+               } else
+                       duration += xatoul_sfx(arg, sfx);
+       } while (*++argv);
+
+       ts.tv_sec = MAXINT(typeof(ts.tv_sec));
+       ts.tv_nsec = 0;
+       if (duration >= 0 && duration < ts.tv_sec) {
+               ts.tv_sec = duration;
+               ts.tv_nsec = (duration - ts.tv_sec) * 1000000000;
        }
+       do {
+               errno = 0;
+               nanosleep(&ts, &ts);
+       } while (errno == EINTR);
+
+#elif ENABLE_FEATURE_FANCY_SLEEP
+
+       duration = 0;
+       do {
+               duration += xatou_range_sfx(*argv, 0, UINT_MAX - duration, sfx);
+       } while (*++argv);
+       sleep(duration);
+
+#else /* simple */
+
+       duration = xatou(*argv);
+       sleep(duration);
+       // Off. If it's really needed, provide example why
+       //if (sleep(duration)) {
+       //      bb_perror_nomsg_and_die();
+       //}
+
+#endif
 
-       if ( sleep(atoi(*(++argv))) != 0 ) {
-               perror( "sleep");
-               exit (FALSE);
-       } else
-               exit (TRUE);
+       return EXIT_SUCCESS;
 }