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

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

diff --git a/coreutils/usleep.c b/coreutils/usleep.c
index 2e4eb57211d29815e22eb8af7bef10a0024ad57d..684ab781b179ec73e783e2af6c5f580d7b6f94f0 100644 (file)
--- a/coreutils/usleep.c
+++ b/coreutils/usleep.c
@@ -6,6 +6,15 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config USLEEP
+//config:      bool "usleep (1.1 kb)"
+//config:      default y
+//config:      help
+//config:      usleep is used to pause for a specified number of microseconds.
+
+//applet:IF_USLEEP(APPLET_NOFORK(usleep, usleep, BB_DIR_BIN, BB_SUID_DROP, usleep))
+
+//kbuild:lib-$(CONFIG_USLEEP) += usleep.o
 
 /* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
 
@@ -29,6 +38,13 @@ int usleep_main(int argc UNUSED_PARAM, char **argv)
                bb_show_usage();
        }
 
+       /* Safe wrt NOFORK? (noforks are not allowed to run for
+        * a long time). Try "usleep 99999999" + ^C + "echo $?"
+        * in hush with FEATURE_SH_NOFORK=y.
+        * At least on uclibc, usleep() thanslates to nanosleep()
+        * which returns early on any signal (even caught one),
+        * and uclibc does not loop back on EINTR.
+        */
        usleep(xatou(argv[1]));
 
        return EXIT_SUCCESS;