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, 4 insertions, 4 deletions

diff --git a/runit/svlogd.c b/runit/svlogd.c
index 6c8747e96..b5eed15ab 100644
--- a/runit/svlogd.c
+++ b/runit/svlogd.c
@@ -665,7 +665,7 @@ static ssize_t ndelay_read(int fd, void *buf, size_t count)
 }
 
 /* Used for reading stdin */
-static int buffer_pread(int fd, char *s, unsigned len)
+static int buffer_pread(/*int fd, */char *s, unsigned len)
 {
         unsigned now;
         struct pollfd input;
@@ -709,7 +709,7 @@ static int buffer_pread(int fd, char *s, unsigned len)
                 poll(&input, 1, i * 1000);
                 sigprocmask(SIG_BLOCK, blocked_sigset, NULL);
 
-                i = ndelay_read(fd, s, len);
+                i = ndelay_read(0, s, len);
                 if (i >= 0)
                         break;
                 if (errno == EINTR)
@@ -909,7 +909,7 @@ int svlogd_main(int argc, char **argv)
                 if (!np && !exitasap) {
                         i = linemax - stdin_cnt; /* avail. bytes at tail */
                         if (i >= 128) {
-                                i = buffer_pread(0, lineptr + stdin_cnt, i);
+                                i = buffer_pread(/*0, */lineptr + stdin_cnt, i);
                                 if (i <= 0) /* EOF or error on stdin */
                                         exitasap = 1;
                                 else {
@@ -966,7 +966,7 @@ int svlogd_main(int argc, char **argv)
                 /* read/write repeatedly until we see it */
                 while (ch != '\n') {
                         /* lineptr is emptied now, safe to use as buffer */
-                        stdin_cnt = exitasap ? -1 : buffer_pread(0, lineptr, linemax);
+                        stdin_cnt = exitasap ? -1 : buffer_pread(/*0, */lineptr, linemax);
                         if (stdin_cnt <= 0) { /* EOF or error on stdin */
                                 exitasap = 1;
                                 lineptr[0] = ch = '\n';