sleep: support "inf"

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/coreutils/sleep.c b/coreutils/sleep.c
index 5c9cda9f0..7bfaab920 100644
--- a/coreutils/sleep.c
+++ b/coreutils/sleep.c
@@ -68,6 +68,11 @@ int sleep_main(int argc UNUSED_PARAM, char **argv)
         if (!*argv)
                 bb_show_usage();
 
+        /* GNU sleep accepts "inf", "INF", "infinity" and "INFINITY" */
+        if (strncasecmp(argv[0], "inf", 3) == 0)
+                for (;;)
+                        sleep(INT_MAX);
+
 #if ENABLE_FEATURE_FANCY_SLEEP
 # if ENABLE_FLOAT_DURATION
         /* undo busybox.c setlocale */