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/editors/vi.c b/editors/vi.c
index f5df41636..1fa7c3a09 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -2139,7 +2139,7 @@ static int mysleep(int hund)	// sleep for 'h' 1/100 seconds
 
         pfd[0].fd = 0;
         pfd[0].events = POLLIN;
-        return poll(pfd, 1, hund*10) > 0;
+        return safe_poll(pfd, 1, hund*10) > 0;
 }
 
 #define readbuffer bb_common_bufsiz1
@@ -2221,7 +2221,7 @@ static char readit(void)	// read (maybe cursor) key from stdin
                         pfd[0].events = POLLIN;
                         // Wait 50 ms
                         // keep reading while there are input chars and room in buffer
-                        while (poll(pfd, 1, 50) > 0 && n <= (MAX_LINELEN - 5)) {
+                        while (safe_poll(pfd, 1, 50) > 0 && n <= (MAX_LINELEN - 5)) {
                                 // read the rest of the ESC string
                                 int r = read(0, readbuffer + n, MAX_LINELEN - n);
                                 if (r > 0)