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/* Copyright (c) 2020 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "buffer.h"
#include "eacces-error.h"
#include "istream.h"
enum buffer_append_result
buffer_append_full_istream(buffer_t *buf, struct istream *is, size_t max_read_size,
const char **error_r)
{
const unsigned char *data;
size_t size;
ssize_t ret;
while ((ret = i_stream_read_more(is, &data, &size)) > 0) {
if (max_read_size == 0)
return BUFFER_APPEND_READ_MAX_SIZE;
size = I_MIN(max_read_size, size);
buffer_append(buf, data, size);
i_stream_skip(is, size);
max_read_size -= size;
}
if (ret == 0)
return BUFFER_APPEND_READ_MORE;
i_assert(is->eof);
if (is->stream_errno != 0) {
*error_r = i_stream_get_error(is);
return BUFFER_APPEND_READ_ERROR;
}
return BUFFER_APPEND_OK;
}
enum buffer_append_result
buffer_append_full_file(buffer_t *buf, const char *file, size_t max_read_size,
const char **error_r)
{
struct istream *is = i_stream_create_file(file, IO_BLOCK_SIZE);
enum buffer_append_result res =
buffer_append_full_istream(buf, is, max_read_size, error_r);
if (is->stream_errno == EACCES)
*error_r = eacces_error_get("open", file);
i_stream_unref(&is);
i_assert(res != BUFFER_APPEND_READ_MORE);
return res;
}
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