libbb: introduce and use safe_waitpid (loops in EINTR)

*: use more approproate (shorter) versions of wait()

function                                             old     new   delta
safe_waitpid                                           -      48     +48
wait_any_nohang                                        -      17     +17
send_tree                                            365     369      +4
processorstop                                        432     435      +3
text_yank                                            110     108      -2
make_human_readable_str                              202     200      -2
crond_main                                          1368    1366      -2
handle_sigchld                                        49      43      -6
reapchild                                            166     159      -7
custom                                               260     250     -10
checkscript                                          191     177     -14
wait_nohang                                           17       -     -17
wait_pid                                              43       -     -43
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 2/7 up/down: 72/-103)           Total: -31 bytes

1 files changed, 1 insertions, 1 deletions

diff --git a/networking/httpd.c b/networking/httpd.c
index 87dc4b7da..72949755a 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -1152,7 +1152,7 @@ static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post
                 count = safe_poll(pfd, 3, -1);
                 if (count <= 0) {
 #if 0
-                        if (waitpid(pid, &status, WNOHANG) <= 0) {
+                        if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
                                 /* Weird. CGI didn't exit and no fd's
                                  * are ready, yet poll returned?! */
                                 continue;