diff options
Diffstat (limited to 'libbb/copyfd.c')
| -rw-r--r-- | libbb/copyfd.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/libbb/copyfd.c b/libbb/copyfd.c index ae5c26999..d41fd10f0 100644 --- a/libbb/copyfd.c +++ b/libbb/copyfd.c @@ -18,7 +18,7 @@ * was seen to cause largish delays when user tries to ^C a file copy. * Let's use a saner size. * Note: needs to be >= max(CONFIG_FEATURE_COPYBUF_KB), - * or else "copy to eof" code will use neddlesly short reads. + * or else "copy to eof" code will use needlesly short reads. */ #define SENDFILE_BIGBUF (16*1024*1024) @@ -60,10 +60,13 @@ static off_t bb_full_fd_action(int src_fd, int dst_fd, off_t size) ssize_t rd; if (sendfile_sz) { - rd = sendfile(dst_fd, src_fd, NULL, - size > sendfile_sz ? sendfile_sz : size); - if (rd >= 0) - goto read_ok; + /* dst_fd == -1 is a fake, else... */ + if (dst_fd >= 0) { + rd = sendfile(dst_fd, src_fd, NULL, + size > sendfile_sz ? sendfile_sz : size); + if (rd >= 0) + goto read_ok; + } sendfile_sz = 0; /* do not try sendfile anymore */ } #if CONFIG_FEATURE_COPYBUF_KB > 4 |