diff options
| -rw-r--r-- | nuttx/lib/misc/lib_sendfile.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/nuttx/lib/misc/lib_sendfile.c b/nuttx/lib/misc/lib_sendfile.c index 7d7a781f58..b7959482e3 100644 --- a/nuttx/lib/misc/lib_sendfile.c +++ b/nuttx/lib/misc/lib_sendfile.c @@ -114,6 +114,7 @@ ssize_t sendfile(int outfd, int infd, off_t *offset, size_t count) { FAR uint8_t *iobuffer; + FAR uint8_t *wrbuffer; off_t startpos = 0; ssize_t nbytesread; ssize_t nbyteswritten; @@ -205,18 +206,31 @@ ssize_t sendfile(int outfd, int infd, off_t *offset, size_t count) * conclusion. */ + wrbuffer = iobuffer; do { - nbyteswritten = write(outfd, iobuffer, nbytesread); + nbyteswritten = write(outfd, wrbuffer, nbytesread); - /* Check for a complete (or parial write) */ + /* Check for a complete (or parial write). write() should not + * return zero. + */ if (nbyteswritten >= 0) { - nbytesread -= nbyteswritten; + /* Advance the buffer pointer and decrement the number of bytes + * remaining in the iobuffer. Typically, nbytesread will now + * be zero. + */ + + wrbuffer += nbyteswritten; + nbytesread -= nbyteswritten; + + /* Increment the total number of bytes successfully transferred. */ + + ntransferred += nbyteswritten; } - /* Otherwise an error occurred (write should not return zero) */ + /* Otherwise an error occurred */ else { |