* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config USLEEP
-//config: bool "usleep"
+//config: bool "usleep (1.1 kb)"
//config: default y
//config: help
-//config: usleep is used to pause for a specified number of microseconds.
+//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))
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;