section 3 · Library functions 📚

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C (continued)

CURLOPT_IOCTLFUNCTION(3)callback for I/O operations✨
CURLOPT_IPRESOLVE(3)IP protocol version to use✨
CURLOPT_ISSUERCERT(3)issuer SSL certificate filename✨
CURLOPT_ISSUERCERT_BLOB(3)issuer SSL certificate from memory blob✨
CURLOPT_KEEP_SENDING_ON_ERROR(3)keep sending on early HTTP response >= 300✨
CURLOPT_KEYPASSWD(3)passphrase to private key✨
CURLOPT_KRBLEVEL(3)FTP kerberos security level✨
CURLOPT_LOCALPORT(3)local port number to use for socket✨
CURLOPT_LOCALPORTRANGE(3)number of additional local ports to try✨
CURLOPT_LOGIN_OPTIONS(3)login options✨
CURLOPT_LOW_SPEED_LIMIT(3)low speed limit in bytes per second✨
CURLOPT_LOW_SPEED_TIME(3)low speed limit time period✨
CURLOPT_MAIL_AUTH(3)SMTP authentication address✨
CURLOPT_MAIL_FROM(3)SMTP sender address✨
CURLOPT_MAIL_RCPT(3)list of SMTP mail recipients✨
CURLOPT_MAIL_RCPT_ALLLOWFAILS(3)allow RCPT TO command to fail for some recipients✨
CURLOPT_MAIL_RCPT_ALLOWFAILS(3)allow RCPT TO command to fail for some recipients✨
CURLOPT_MAX_RECV_SPEED_LARGE(3)rate limit data download speed✨
CURLOPT_MAX_SEND_SPEED_LARGE(3)rate limit data upload speed✨
CURLOPT_MAXAGE_CONN(3)max idle time allowed for reusing a connection✨
CURLOPT_MAXCONNECTS(3)maximum connection cache size✨
CURLOPT_MAXFILESIZE(3)maximum file size allowed to download✨
CURLOPT_MAXFILESIZE_LARGE(3)maximum file size allowed to download✨
CURLOPT_MAXLIFETIME_CONN(3)max lifetime (since creation) allowed for reusing a connection✨
CURLOPT_MAXREDIRS(3)maximum number of redirects allowed✨
CURLOPT_MIME_OPTIONS(3)set MIME option flags✨
CURLOPT_MIMEPOST(3)send data from mime structure✨
CURLOPT_NETRC(3)enable use of .netrc✨
CURLOPT_NETRC_FILE(3)filename to read .netrc info from✨
CURLOPT_NEW_DIRECTORY_PERMS(3)permissions for remotely created directories✨
CURLOPT_NEW_FILE_PERMS(3)permissions for remotely created files✨
CURLOPT_NOBODY(3)do the download request without getting the body✨
CURLOPT_NOPROGRESS(3)switch off the progress meter✨
CURLOPT_NOPROXY(3)disable proxy use for specific hosts✨
CURLOPT_NOSIGNAL(3)skip all signal handling✨
CURLOPT_OPENSOCKETDATA(3)pointer passed to open socket callback✨
CURLOPT_OPENSOCKETFUNCTION(3)callback for opening socket✨
CURLOPT_PASSWORD(3)password to use in authentication✨
CURLOPT_PATH_AS_IS(3)do not handle dot-dot sequences✨
CURLOPT_PINNEDPUBLICKEY(3)pinned public key✨
CURLOPT_PIPEWAIT(3)wait for multiplexing✨
CURLOPT_PORT(3)remote port number to connect to✨
CURLOPT_POST(3)make an HTTP POST✨
CURLOPT_POSTFIELDS(3)data to POST to server✨
CURLOPT_POSTFIELDSIZE(3)size of POST data pointed to✨
CURLOPT_POSTFIELDSIZE_LARGE(3)size of POST data pointed to✨
CURLOPT_POSTQUOTE(3)(S)FTP commands to run after the transfer✨
CURLOPT_POSTREDIR(3)how to act on an HTTP POST redirect✨
CURLOPT_PRE_PROXY(3)pre-proxy host to use✨
CURLOPT_PREQUOTE(3)commands to run before an FTP transfer✨
CURLOPT_PREREQDATA(3)pointer passed to the pre-request callback✨
CURLOPT_PREREQFUNCTION(3)user callback called when a connection has been established, but before a request has been made.✨
CURLOPT_PRIVATE(3)store a private pointer✨
CURLOPT_PROGRESSDATA(3)pointer passed to the progress callback✨
CURLOPT_PROGRESSFUNCTION(3)progress meter callback✨
CURLOPT_PROTOCOLS(3)allowed protocols✨
CURLOPT_PROTOCOLS_STR(3)allowed protocols✨
CURLOPT_PROXY(3)proxy to use✨
CURLOPT_PROXY_CAINFO(3)path to proxy Certificate Authority (CA) bundle✨
CURLOPT_PROXY_CAINFO_BLOB(3)proxy Certificate Authority (CA) bundle in PEM format✨
CURLOPT_PROXY_CAPATH(3)directory holding HTTPS proxy CA certificates✨
CURLOPT_PROXY_CRLFILE(3)HTTPS proxy Certificate Revocation List file✨
CURLOPT_PROXY_ISSUERCERT(3)proxy issuer SSL certificate filename✨
CURLOPT_PROXY_ISSUERCERT_BLOB(3)proxy issuer SSL certificate from memory blob✨
CURLOPT_PROXY_KEYPASSWD(3)passphrase for the proxy private key✨
CURLOPT_PROXY_PINNEDPUBLICKEY(3)pinned public key for https proxy✨
CURLOPT_PROXY_SERVICE_NAME(3)proxy authentication service name✨
CURLOPT_PROXY_SSL_CIPHER_LIST(3)ciphers to use for HTTPS proxy✨
CURLOPT_PROXY_SSL_OPTIONS(3)HTTPS proxy SSL behavior options✨
CURLOPT_PROXY_SSL_VERIFYHOST(3)verify the proxy certificate's name against host✨
CURLOPT_PROXY_SSL_VERIFYPEER(3)verify the proxy's SSL certificate✨
CURLOPT_PROXY_SSLCERT(3)HTTPS proxy client certificate✨
CURLOPT_PROXY_SSLCERT_BLOB(3)SSL proxy client certificate from memory blob✨
CURLOPT_PROXY_SSLCERTTYPE(3)type of the proxy client SSL certificate✨
CURLOPT_PROXY_SSLKEY(3)private key file for HTTPS proxy client cert✨
CURLOPT_PROXY_SSLKEY_BLOB(3)private key for proxy cert from memory blob✨
CURLOPT_PROXY_SSLKEYTYPE(3)type of the proxy private key file✨
CURLOPT_PROXY_SSLVERSION(3)preferred HTTPS proxy TLS version✨
CURLOPT_PROXY_TLS13_CIPHERS(3)ciphers suites for proxy TLS 1.3✨
CURLOPT_PROXY_TLSAUTH_PASSWORD(3)password to use for proxy TLS authentication✨
CURLOPT_PROXY_TLSAUTH_TYPE(3)HTTPS proxy TLS authentication methods✨
CURLOPT_PROXY_TLSAUTH_USERNAME(3)username to use for proxy TLS authentication✨
CURLOPT_PROXY_TRANSFER_MODE(3)append FTP transfer mode to URL for proxy✨
CURLOPT_PROXYAUTH(3)HTTP proxy authentication methods✨
CURLOPT_PROXYHEADER(3)set of HTTP headers to pass to proxy✨
CURLOPT_PROXYPASSWORD(3)password to use with proxy authentication✨
CURLOPT_PROXYPORT(3)port number the proxy listens on✨
CURLOPT_PROXYTYPE(3)proxy protocol type✨
CURLOPT_PROXYUSERNAME(3)username to use for proxy authentication✨
CURLOPT_PROXYUSERPWD(3)username and password to use for proxy authentication✨
CURLOPT_PUT(3)make an HTTP PUT request✨
CURLOPT_QUICK_EXIT(3)allow libcurl to exit quickly✨
CURLOPT_QUOTE(3)(S)FTP commands to run before transfer✨
CURLOPT_RANDOM_FILE(3)file to read random data from✨
CURLOPT_RANGE(3)byte range to request✨
CURLOPT_READDATA(3)pointer passed to the read callback✨
CURLOPT_READFUNCTION(3)read callback for data uploads✨
CURLOPT_REDIR_PROTOCOLS(3)protocols allowed to redirect to✨
CURLOPT_REDIR_PROTOCOLS_STR(3)protocols allowed to redirect to✨
CURLOPT_REFERER(3)the HTTP referer header✨
CURLOPT_REQUEST_TARGET(3)alternative target for this request✨
CURLOPT_RESOLVE(3)provide custom hostname to IP address resolves✨
CURLOPT_RESOLVER_START_DATA(3)pointer passed to the resolver start callback✨
CURLOPT_RESOLVER_START_FUNCTION(3)callback called before a new name resolve is started✨
CURLOPT_RESUME_FROM(3)offset to resume transfer from✨
CURLOPT_RESUME_FROM_LARGE(3)offset to resume transfer from✨
CURLOPT_RTSP_CLIENT_CSEQ(3)RTSP client CSEQ number✨
CURLOPT_RTSP_REQUEST(3)RTSP request✨
CURLOPT_RTSP_SERVER_CSEQ(3)RTSP server CSEQ number✨
CURLOPT_RTSP_SESSION_ID(3)RTSP session ID✨
CURLOPT_RTSP_STREAM_URI(3)RTSP stream URI✨
CURLOPT_RTSP_TRANSPORT(3)RTSP Transport: header✨
CURLOPT_SASL_AUTHZID(3)authorization identity (identity to act as)✨
CURLOPT_SASL_IR(3)send initial response in first packet✨
CURLOPT_SEEKDATA(3)pointer passed to the seek callback✨
CURLOPT_SEEKFUNCTION(3)user callback for seeking in input stream✨
CURLOPT_SERVER_RESPONSE_TIMEOUT(3)time allowed to wait for server response✨
CURLOPT_SERVER_RESPONSE_TIMEOUT_MS(3)time allowed to wait for server response✨
CURLOPT_SERVICE_NAME(3)authentication service name✨
CURLOPT_SHARE(3)share handle to use✨
CURLOPT_SOCKOPTDATA(3)pointer to pass to sockopt callback✨
CURLOPT_SOCKOPTFUNCTION(3)callback for setting socket options✨
CURLOPT_SOCKS5_AUTH(3)methods for SOCKS5 proxy authentication✨
CURLOPT_SOCKS5_GSSAPI_NEC(3)SOCKS proxy GSSAPI negotiation protection✨
CURLOPT_SOCKS5_GSSAPI_SERVICE(3)SOCKS5 proxy authentication service name✨
CURLOPT_SSH_AUTH_TYPES(3)auth types for SFTP and SCP✨
CURLOPT_SSH_COMPRESSION(3)enable SSH compression✨
CURLOPT_SSH_HOST_PUBLIC_KEY_MD5(3)MD5 checksum of SSH server public key✨
CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256(3)SHA256 hash of SSH server public key✨
CURLOPT_SSH_HOSTKEYDATA(3)pointer to pass to the SSH host key callback✨
CURLOPT_SSH_HOSTKEYFUNCTION(3)callback to check host key✨
CURLOPT_SSH_KEYDATA(3)pointer passed to the SSH key callback✨
CURLOPT_SSH_KEYFUNCTION(3)callback for known host matching logic✨
CURLOPT_SSH_KNOWNHOSTS(3)filename holding the SSH known hosts✨
CURLOPT_SSH_PRIVATE_KEYFILE(3)private key file for SSH auth✨
CURLOPT_SSH_PUBLIC_KEYFILE(3)public key file for SSH auth✨
CURLOPT_SSL_CIPHER_LIST(3)ciphers to use for TLS✨
CURLOPT_SSL_CTX_DATA(3)pointer passed to SSL context callback✨
CURLOPT_SSL_CTX_FUNCTION(3)SSL context callback✨
CURLOPT_SSL_EC_CURVES(3)key exchange curves✨
CURLOPT_SSL_ENABLE_ALPN(3)Application Layer Protocol Negotiation✨
CURLOPT_SSL_ENABLE_NPN(3)use NPN✨
CURLOPT_SSL_FALSESTART(3)TLS false start✨
CURLOPT_SSL_OPTIONS(3)SSL behavior options✨
CURLOPT_SSL_SESSIONID_CACHE(3)use the SSL session-ID cache✨
CURLOPT_SSL_SIGNATURE_ALGORITHMS(3)signature algorithms to use for TLS✨
CURLOPT_SSL_VERIFYHOST(3)verify the certificate's name against host✨
CURLOPT_SSL_VERIFYPEER(3)verify the peer's SSL certificate✨
CURLOPT_SSL_VERIFYSTATUS(3)verify the certificate's status✨
CURLOPT_SSLCERT(3)SSL client certificate✨
CURLOPT_SSLCERT_BLOB(3)SSL client certificate from memory blob✨
CURLOPT_SSLCERTTYPE(3)type of client SSL certificate✨
CURLOPT_SSLENGINE(3)Set SSL engine or provider✨
CURLOPT_SSLENGINE_DEFAULT(3)make SSL engine default✨
CURLOPT_SSLKEY(3)private key file for TLS and SSL client cert✨
CURLOPT_SSLKEY_BLOB(3)private key for client cert from memory blob✨
CURLOPT_SSLKEYTYPE(3)type of the private key file✨
CURLOPT_SSLVERSION(3)preferred TLS/SSL version✨
CURLOPT_STDERR(3)redirect stderr to another stream✨
CURLOPT_STREAM_DEPENDS(3)stream this transfer depends on✨
CURLOPT_STREAM_DEPENDS_E(3)stream this transfer depends on exclusively✨
CURLOPT_STREAM_WEIGHT(3)numerical stream weight✨
CURLOPT_SUPPRESS_CONNECT_HEADERS(3)suppress proxy CONNECT response headers✨
CURLOPT_TCP_FASTOPEN(3)TCP Fast Open✨
CURLOPT_TCP_KEEPALIVE(3)TCP keep-alive probing✨
CURLOPT_TCP_KEEPCNT(3)Maximum number of TCP keep-alive probes✨
CURLOPT_TCP_KEEPIDLE(3)TCP keep-alive idle time wait✨
CURLOPT_TCP_KEEPINTVL(3)TCP keep-alive interval✨
CURLOPT_TCP_NODELAY(3)the TCP_NODELAY option✨
CURLOPT_TELNETOPTIONS(3)set of telnet options✨
CURLOPT_TFTP_BLKSIZE(3)TFTP block size✨
CURLOPT_TFTP_NO_OPTIONS(3)send no TFTP options requests✨
CURLOPT_TIMECONDITION(3)select condition for a time request✨
CURLOPT_TIMEOUT(3)maximum time the transfer is allowed to complete✨
CURLOPT_TIMEOUT_MS(3)maximum time the transfer is allowed to complete✨
CURLOPT_TIMEVALUE(3)time value for conditional✨
CURLOPT_TIMEVALUE_LARGE(3)time value for conditional✨
CURLOPT_TLS13_CIPHERS(3)ciphers suites to use for TLS 1.3✨
CURLOPT_TLSAUTH_PASSWORD(3)password to use for TLS authentication✨
CURLOPT_TLSAUTH_TYPE(3)TLS authentication methods✨
CURLOPT_TLSAUTH_USERNAME(3)username to use for TLS authentication✨
CURLOPT_TRAILERDATA(3)pointer passed to trailing headers callback✨
CURLOPT_TRAILERFUNCTION(3)callback for sending trailing headers✨
CURLOPT_TRANSFER_ENCODING(3)ask for HTTP Transfer Encoding✨
CURLOPT_TRANSFERTEXT(3)request a text based transfer for FTP✨
CURLOPT_UNIX_SOCKET_PATH(3)Unix domain socket✨
CURLOPT_UNRESTRICTED_AUTH(3)send credentials to other hosts too✨
CURLOPT_UPKEEP_INTERVAL_MS(3)connection upkeep interval✨
CURLOPT_UPLOAD(3)data upload✨
CURLOPT_UPLOAD_BUFFERSIZE(3)upload buffer size✨
CURLOPT_UPLOAD_FLAGS(3)upload flags for IMAP✨
CURLOPT_URL(3)URL for this transfer✨
CURLOPT_USE_SSL(3)request using SSL / TLS for the transfer✨
CURLOPT_USERAGENT(3)HTTP user-agent header✨
CURLOPT_USERNAME(3)username to use in authentication✨
CURLOPT_USERPWD(3)username and password to use in authentication✨
CURLOPT_VERBOSE(3)verbose mode✨
CURLOPT_WILDCARDMATCH(3)directory wildcard transfers✨
CURLOPT_WRITEDATA(3)pointer passed to the write callback✨
CURLOPT_WRITEFUNCTION(3)callback for writing received data✨