How to check the buffer size of a file?

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curlopt_buffersize

CURLOPT_BUFFERSIZE(3)					     curl_easy_setopt options					     CURLOPT_BUFFERSIZE(3)

NAME

       CURLOPT_BUFFERSIZE - set preferred receive buffer size

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_BUFFERSIZE, long size);

DESCRIPTION

       Pass  a	long  specifying your preferred size (in bytes) for the receive buffer in libcurl.  The main point of this would be that the write
       callback gets called more often and with smaller chunks. Secondly, for some protocols, there's a benefit of having a larger buffer for per-
       formance.

       This is just treated as a request, not an order. You cannot be guaranteed to actually get the given size.

       This buffer size is by default CURL_MAX_WRITE_SIZE (16kB). The maximum buffer size allowed to set is CURL_MAX_READ_SIZE (512kB).

DEFAULT

       CURL_MAX_WRITE_SIZE (16kB)

PROTOCOLS

       All

EXAMPLE

       TODO

AVAILABILITY

       Added in 7.10.  Growing the buffer was added in 7.53.0.

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_MAX_RECV_SPEED_LARGE(3), CURLOPT_WRITEFUNCTION(3),

libcurl 7.54.0							 December 20, 2016					     CURLOPT_BUFFERSIZE(3)

UNIX for Dummies Questions & Answers