>From 317c936677d7b06f6972d5214b8c38aab1e26121 Mon Sep 17 00:00:00 2001
From: Ed Neville <address@hidden>
Date: Tue, 21 Sep 2010 20:59:19 +0100
Subject: [PATCH] This change adds a sleep between invocations of cmd.

---
 xargs/xargs.c |   23 +++++++++++++++++++++--
 1 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/xargs/xargs.c b/xargs/xargs.c
index 22668d3..b9ff31b 100644
--- a/xargs/xargs.c
+++ b/xargs/xargs.c
@@ -175,6 +175,9 @@ static bool query_before_executing = false;
  */
 static char input_delimiter = '\0';
 
+/* Delay between invocations of cmd and flag for previous delay */
+static int delay_before_executing = 0;
+static int delay_before_executing_cycle = 0;
 
 static struct option const longopts[] =
 {
@@ -185,6 +188,7 @@ static struct option const longopts[] =
   {"replace", optional_argument, NULL, 'I'},
   {"max-lines", optional_argument, NULL, 'l'},
   {"max-args", required_argument, NULL, 'n'},
+  {"delay", required_argument, NULL, 'D'},
   {"interactive", no_argument, NULL, 'p'},
   {"no-run-if-empty", no_argument, NULL, 'r'},
   {"max-chars", required_argument, NULL, 's'},
@@ -478,7 +482,7 @@ main (int argc, char **argv)
       bc_use_sensible_arg_max (&bc_ctl);
     }
 
-  while ((optc = getopt_long (argc, argv, "+0a:E:e::i::I:l::L:n:prs:txP:d:",
+  while ((optc = getopt_long (argc, argv, "+0a:E:e::i::I:l::L:n:prs:txP:d:D:",
 			      longopts, (int *) 0)) != -1)
     {
       switch (optc)
@@ -492,6 +496,10 @@ main (int argc, char **argv)
 	  read_args = read_string;
 	  input_delimiter = get_input_delimiter (optarg);
 	  break;
+	
+	case 'D':
+	  delay_before_executing = parse_num (optarg, 'D', 1L, -1L, 1);
+	  break;
 
 	case 'E':		/* POSIX */
 	case 'e':		/* deprecated */
@@ -1087,6 +1095,17 @@ xargs_do_exec (struct buildcmd_control *ctl, void *usercontext, int argc, char *
 
   (void) ctl;
 
+  if (delay_before_executing != 0 && delay_before_executing_cycle > 0 )
+    sleep (delay_before_executing );
+  else 
+    {
+      if (delay_before_executing != 0 )
+        {
+          delay_before_executing_cycle = 1;
+        }
+    }
+
+
   if (!query_before_executing || print_args (true))
     {
       if (proc_max)
@@ -1509,7 +1528,7 @@ Usage: %s [-0prtx] [--interactive] [--null] [-d|--delimiter=delim]\n\
        [-E eof-str] [-e[eof-str]]  [--eof[=eof-str]]\n\
        [-L max-lines] [-l[max-lines]] [--max-lines[=max-lines]]\n\
        [-I replace-str] [-i[replace-str]] [--replace[=replace-str]]\n\
-       [-n max-args] [--max-args=max-args]\n\
+       [-n max-args] [--max-args=max-args] [-D|--delay=[iteration delay sec]]\n\
        [-s max-chars] [--max-chars=max-chars]\n\
        [-P max-procs]  [--max-procs=max-procs] [--show-limits]\n\
        [--verbose] [--exit] [--no-run-if-empty] [--arg-file=file]\n\
-- 
1.7.0.4