76 строки
2.5 KiB
Groff
76 строки
2.5 KiB
Groff
|
.\" You can view this file with:
|
||
|
|
.\" nroff -man [file]
|
||
|
|
.\" Written by Daniel.Stenberg@haxx.nu
|
||
|
|
.\"
|
||
|
|
.TH curl_easy_setopt 3 "22 May 2000" "Curl 7.0" "libcurl Manual"
|
||
|
|
.SH NAME
|
||
|
|
curl_easy_setopt - Set curl easy-session options
|
||
|
|
.SH SYNOPSIS
|
||
|
|
.B #include <curl/easy.h>
|
||
|
|
.sp
|
||
|
|
.BI "CURLcode curl_easy_setopt(CURL *" handle ", CURLoption "option ", ...);
|
||
|
|
.ad
|
||
|
|
.SH DESCRIPTION
|
||
|
|
curl_easy_setopt() is called to tell libcurl how to behave in a number of
|
||
|
|
ways. Most operations in libcurl have default actions, and by using the
|
||
|
|
appropriate options you can make them behave differently (as documented). All
|
||
|
|
options are set with the
|
||
|
|
.I option
|
||
|
|
followed by a parameter. That parameter can be a long, a function pointer or
|
||
|
|
an object pointer, all depending on what the option in question expects. Read
|
||
|
|
this manual carefully as bad input values may cause libcurl to behave badly!
|
||
|
|
|
||
|
|
The
|
||
|
|
.I "handle"
|
||
|
|
is the return code from the
|
||
|
|
.I "curl_easy_init"
|
||
|
|
call.
|
||
|
|
.SH OPTIONS
|
||
|
|
.TP 0.8i
|
||
|
|
.B CURLOPT_FILE
|
||
|
|
Data pointer to pass instead of FILE * to the file write function. Note that
|
||
|
|
if you specify the
|
||
|
|
.I CURLOPT_WRITEFUNCTION
|
||
|
|
, this is the pointer you'll get as input.
|
||
|
|
.TP
|
||
|
|
.B CURLOPT_WRITEFUNCTION
|
||
|
|
Function pointer that should use match the following prototype:
|
||
|
|
.BI "size_t function( void *ptr, size_t size, size_t nmemb, FILE *stream);"
|
||
|
|
This function gets called by libcurl as soon as there is received data that
|
||
|
|
needs to be written down. The size of the data pointed to by
|
||
|
|
.I ptr
|
||
|
|
is
|
||
|
|
.I size
|
||
|
|
multiplied with
|
||
|
|
.I nmemb.
|
||
|
|
Return the number of bytes actually written or return -1 to signal error to the library (it will cause it to abort the transfer).
|
||
|
|
.TP
|
||
|
|
.B CURLOPT_INFILE
|
||
|
|
Data pointer to pass instead of FILE * to the file read function. Note that if
|
||
|
|
you specify the
|
||
|
|
.I CURLOPT_READFUNCTION
|
||
|
|
, this is the pointer you'll get as input.
|
||
|
|
.TP
|
||
|
|
.B CURLOPT_READFUNCTION
|
||
|
|
Function pointer that should use match the following prototype:
|
||
|
|
.BI "size_t function( void *ptr, size_t size, size_t nmemb, FILE *stream);"
|
||
|
|
This function gets called by libcurl as soon as it needs to read data in order
|
||
|
|
to send it to the peer. The data area pointed at by the pointer
|
||
|
|
.I ptr
|
||
|
|
may be filled with at most
|
||
|
|
.I size
|
||
|
|
multiplied with
|
||
|
|
.I nmemb
|
||
|
|
number of bytes. Your function must return the actual number of bytes that you
|
||
|
|
stored in that memory area. Returning -1 will signal an error to the library
|
||
|
|
and cause it to abort the current transfer immediately.
|
||
|
|
.PP
|
||
|
|
.SH RETURN VALUE
|
||
|
|
0 means the option was set properly, non-zero means an error as
|
||
|
|
.I <curl/curl.h>
|
||
|
|
defines
|
||
|
|
.SH "SEE ALSO"
|
||
|
|
.BR curl_easy_init "(3), " curl_easy_cleanup "(3), "
|
||
|
|
.SH BUGS
|
||
|
|
Surely there are some, you tell me!
|