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- .\" generated by cd2nroff 0.1 from CURLOPT_SSH_KNOWNHOSTS.md
- .TH CURLOPT_SSH_KNOWNHOSTS 3 "2025-01-17" 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.
- .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)
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