.\" generated by cd2nroff 0.1 from CURLOPT_INFILESIZE.md .TH CURLOPT_INFILESIZE 3 "2024-09-18" libcurl .SH NAME CURLOPT_INFILESIZE \- size of the input file to send off .SH SYNOPSIS .nf #include CURLcode curl_easy_setopt(CURL *handle, CURLOPT_INFILESIZE, long filesize); .fi .SH DESCRIPTION When uploading a file to a remote site, \fIfilesize\fP should be used to tell libcurl what the expected size of the input file is. This value must be passed as a long. See also \fICURLOPT_INFILESIZE_LARGE(3)\fP for sending files larger than 2GB. For uploading using SCP, this option or \fICURLOPT_INFILESIZE_LARGE(3)\fP is mandatory. To unset this value again, set it to \-1. Using \fICURLOPT_UPLOAD(3)\fP to an HTTP/1.1 server and this value set to \-1, makes libcurl do a chunked transfer\-encoded upload. When sending emails using SMTP, this command can be used to specify the optional SIZE parameter for the MAIL FROM command. This option does not limit how much data libcurl actually sends, as that is controlled entirely by what the read callback returns, but telling one value and sending a different amount may lead to errors. .SH DEFAULT Unset .SH PROTOCOLS This functionality affects all supported protocols .SH EXAMPLE .nf #define FILE_SIZE 12345L int main(void) { CURL *curl = curl_easy_init(); if(curl) { long uploadsize = FILE_SIZE; curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/destination.tar.gz"); curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L); curl_easy_setopt(curl, CURLOPT_INFILESIZE, uploadsize); curl_easy_perform(curl); } } .fi .SH HISTORY SMTP support added in 7.23.0 .SH AVAILABILITY Added in curl 7.1 .SH RETURN VALUE Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. .SH SEE ALSO .BR CURLINFO_CONTENT_LENGTH_UPLOAD_T (3), .BR CURLOPT_INFILESIZE_LARGE (3), .BR CURLOPT_UPLOAD (3)