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repo/core/curl/files/CURLOPT_SSH_KNOWNHOSTS.3
2024-11-09 22:03:25 -06:00

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.\" generated by cd2nroff 0.1 from CURLOPT_SSH_KNOWNHOSTS.md
.TH CURLOPT_SSH_KNOWNHOSTS 3 "2024-11-09" libcurl
.SH NAME
CURLOPT_SSH_KNOWNHOSTS \- filename holding the SSH known hosts
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_KNOWNHOSTS, char *fname);
.fi
.SH DESCRIPTION
Pass a pointer to a null\-terminated string holding the filename of the
known_host file to use. The known_hosts file should use the OpenSSH file
format as supported by libssh2. If this file is specified, libcurl only
accepts connections with hosts that are known and present in that file, with a
matching public key. Use \fICURLOPT_SSH_KEYFUNCTION(3)\fP to alter the default
behavior on host and key matches and mismatches.
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 DEFAULT
NULL
.SH PROTOCOLS
This functionality affects scp and sftp
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/file");
curl_easy_setopt(curl, CURLOPT_SSH_KNOWNHOSTS,
"/home/clarkkent/.ssh/known_hosts");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in curl 7.19.6
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH SEE ALSO
.BR CURLOPT_SSH_AUTH_TYPES (3),
.BR CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 (3)