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.\" generated by cd2nroff 0.1 from CURLOPT_COOKIEJAR.md
.TH CURLOPT_COOKIEJAR 3 "2025-06-27" libcurl
.SH NAME
CURLOPT_COOKIEJAR \- filename to store cookies to
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_COOKIEJAR, char *filename);
.fi
.SH DESCRIPTION
Pass a \fIfilename\fP as a char *, null\-terminated. This makes libcurl write all
internally known cookies to the specified file when \fIcurl_easy_cleanup(3)\fP is
called. If no cookies are kept in memory at that time, no file is created.
Specify "\-" as filename to instead have the cookies written to stdout. Using
this option also enables cookies for this session, so if you for example
follow a redirect it makes matching cookies get sent accordingly.

Note that libcurl does not read any cookies from the cookie jar specified with
this option. To read cookies from a file, use \fICURLOPT_COOKIEFILE(3)\fP.

If the cookie jar file cannot be created or written to (when the
\fIcurl_easy_cleanup(3)\fP is called), libcurl does not and cannot report an error
for this. Using \fICURLOPT_VERBOSE(3)\fP or \fICURLOPT_DEBUGFUNCTION(3)\fP displays a
warning, but that is the only visible feedback you get about this possibly
lethal situation.

Cookies are imported in the Set\-Cookie format without a domain name are not
exported by this option.

The application does not have to keep the string around after setting this
option.

Using this option multiple times makes the last set string override the
previous ones. Set it to NULL to disable its use again.
.SH SECURITY CONCERNS
libcurl cannot fully protect against attacks where an attacker has write
access to the same directory where it is directed to save files. This is
particularly sensitive if you save files using elevated privileges.
.SH DEFAULT
NULL
.SH PROTOCOLS
This functionality affects http only
.SH EXAMPLE
.nf
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");

    /* export cookies to this file when closing the handle */
    curl_easy_setopt(curl, CURLOPT_COOKIEJAR, "/tmp/cookies.txt");

    res = curl_easy_perform(curl);

    /* close the handle, write the cookies */
    curl_easy_cleanup(curl);
  }
}
.fi
.SH AVAILABILITY
Added in curl 7.9
.SH RETURN VALUE
\fIcurl_easy_setopt(3)\fP returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non\-zero means an error occurred, see
\fIlibcurl\-errors(3)\fP.
.SH SEE ALSO
.BR CURLOPT_COOKIE (3),
.BR CURLOPT_COOKIEFILE (3),
.BR CURLOPT_COOKIELIST (3)
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