introduce safe_poll (fixes a problem in top)

function                                             old     new   delta
safe_poll                                              -      77     +77
svlogd_main                                         1470    1466      -4
zcip_main                                           1530    1524      -6
forkexec                                            1345    1338      -7
decode_format_string                                 795     788      -7
collect_blk                                          474     467      -7
buffer_pread                                         540     532      -8
tftp                                                1182    1172     -10
microcom_main                                        763     749     -14
arpping                                              441     424     -17
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/9 up/down: 77/-80)             Total: -3 bytes
   text    data     bss     dec     hex filename
 770162    1034   10404  781600   bed20 busybox_old
 770158    1034   10404  781596   bed1c busybox_unstripped

1 files changed, 2 insertions, 2 deletions

diff --git a/networking/tftp.c b/networking/tftp.c
index ac3a86afb..59f53ae4a 100644
--- a/networking/tftp.c
+++ b/networking/tftp.c
@@ -225,7 +225,7 @@ static int tftp( USE_GETPUT(const int cmd,)
                 /* Receive packet */
                 /*pfd[0].fd = socketfd;*/
                 pfd[0].events = POLLIN;
-                switch (poll(pfd, 1, waittime_ms)) {
+                switch (safe_poll(pfd, 1, waittime_ms)) {
                         unsigned from_port;
                 case 1:
                         from->len = peer_lsa->len;
@@ -262,7 +262,7 @@ static int tftp( USE_GETPUT(const int cmd,)
 
                         goto send_again; /* resend last sent pkt */
                 default:
-                        bb_perror_msg("poll");
+                        /*bb_perror_msg("poll"); - done in safe_poll */
                         goto ret;
                 }
  process_pkt: