Don't lose pointer to first nonempty buf in ngx_*_sendfile_chain(). In ngx_*_sendfile_chain() when calculating pointer to a first non-zero sized buf, use "in" as iterator. This fixes processing of zero sized buf(s) after EINTR. Otherwise function can return zero sized buf to caller, and later ngx_http_write_filter() logs warning.

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#include <ngx_config.h>
#include <ngx_core.h>


#if (NGX_CRYPT)

ngx_int_t
ngx_libc_crypt(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted)
{
    /* STUB: a plain text password */

    *encrypted = key;

    return NGX_OK;
}

#endif /* NGX_CRYPT */