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-rw-r--r--erts/emulator/drivers/unix/unix_efile.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/erts/emulator/drivers/unix/unix_efile.c b/erts/emulator/drivers/unix/unix_efile.c
index 911ec63588..14b7a5cffa 100644
--- a/erts/emulator/drivers/unix/unix_efile.c
+++ b/erts/emulator/drivers/unix/unix_efile.c
@@ -1511,9 +1511,22 @@ efile_sendfile(Efile_error* errInfo, int in_fd, int out_fd,
*nbytes = written;
return check_error(retval, errInfo);
#elif defined(__FreeBSD__) || defined(__DragonFly__)
- off_t len = 0;
- int retval = sendfile(in_fd, out_fd, *offset, *nbytes, NULL, &len, 0);
- *nbytes = len;
+#define SENDFILE_CHUNK_SIZE ((1 << (8*SIZEOF_SIZE_T)) - 1)
+ off_t len;
+ int retval;
+ do {
+ if (*nbytes > SENDFILE_CHUNK_SIZE)
+ retval = sendfile(in_fd, out_fd, *offset, SENDFILE_CHUNK_SIZE,
+ NULL, &len, 0);
+ else
+ retval = sendfile(in_fd, out_fd, *offset, *nbytes, NULL, &len, 0);
+ if (retval != -1 || errno == EAGAIN || errno == EINTR) {
+ *offset += len;
+ *nbytes -= len;
+ written += len;
+ }
+ } while(len == SENDFILE_CHUNK_SIZE);
+ *nbytes = written;
return check_error(retval, errInfo);
#endif
}