Provided by: libcurl4-doc_7.64.0-2ubuntu1_all bug

NAME

       curl_easy_setopt - set options for a curl easy handle

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLoption option, parameter);

DESCRIPTION

       curl_easy_setopt(3)  is  used  to  tell  libcurl how to behave. By setting the appropriate
       options, the application can change libcurl's behavior.   All  options  are  set  with  an
       option  followed  by  a  parameter.  That  parameter can be a long, a function pointer, an
       object pointer or a curl_off_t, depending on what the specific option expects.  Read  this
       manual  carefully as bad input values may cause libcurl to behave badly!  You can only set
       one option in each function call. A  typical  application  uses  many  curl_easy_setopt(3)
       calls in the setup phase.

       Options  set  with  this  function  call are valid for all forthcoming transfers performed
       using this handle.  The options are not in any way reset between transfers, so if you want
       subsequent  transfers  with different options, you must change them between the transfers.
       You can optionally reset all options back to internal default with curl_easy_reset(3).

       Strings passed to libcurl as 'char *' arguments, are  copied  by  the  library;  thus  the
       string   storage   associated   to   the   pointer   argument  may  be  overwritten  after
       curl_easy_setopt(3)   returns.   The   only   exception   to   this   rule    is    really
       CURLOPT_POSTFIELDS(3),     but     the     alternative     that    copies    the    string
       CURLOPT_COPYPOSTFIELDS(3) has some usage characteristics you need to read up on.

       The order in which the options are set does not matter.

       Before version 7.17.0, strings were not copied. Instead the  user  was  forced  keep  them
       available until libcurl no longer needed them.

       The handle is the return code from a curl_easy_init(3) or curl_easy_duphandle(3) call.

BEHAVIOR OPTIONS

       CURLOPT_VERBOSE
              Display verbose information. See CURLOPT_VERBOSE(3)

       CURLOPT_HEADER
              Include the header in the body output. See CURLOPT_HEADER(3)

       CURLOPT_NOPROGRESS
              Shut off the progress meter. See CURLOPT_NOPROGRESS(3)

       CURLOPT_NOSIGNAL
              Do not install signal handlers. See CURLOPT_NOSIGNAL(3)

       CURLOPT_WILDCARDMATCH
              Transfer    multiple    files    according    to   a   file   name   pattern.   See
              CURLOPT_WILDCARDMATCH(3)

CALLBACK OPTIONS

       CURLOPT_WRITEFUNCTION
              Callback for writing data. See CURLOPT_WRITEFUNCTION(3)

       CURLOPT_WRITEDATA
              Data pointer to pass to the write callback. See CURLOPT_WRITEDATA(3)

       CURLOPT_READFUNCTION
              Callback for reading data. See CURLOPT_READFUNCTION(3)

       CURLOPT_READDATA
              Data pointer to pass to the read callback. See CURLOPT_READDATA(3)

       CURLOPT_IOCTLFUNCTION
              Callback for I/O operations. See CURLOPT_IOCTLFUNCTION(3)

       CURLOPT_IOCTLDATA
              Data pointer to pass to the I/O callback. See CURLOPT_IOCTLDATA(3)

       CURLOPT_SEEKFUNCTION
              Callback for seek operations. See CURLOPT_SEEKFUNCTION(3)

       CURLOPT_SEEKDATA
              Data pointer to pass to the seek callback. See CURLOPT_SEEKDATA(3)

       CURLOPT_SOCKOPTFUNCTION
              Callback for sockopt operations. See CURLOPT_SOCKOPTFUNCTION(3)

       CURLOPT_SOCKOPTDATA
              Data pointer to pass to the sockopt callback. See CURLOPT_SOCKOPTDATA(3)

       CURLOPT_OPENSOCKETFUNCTION
              Callback for socket creation. See CURLOPT_OPENSOCKETFUNCTION(3)

       CURLOPT_OPENSOCKETDATA
              Data pointer to pass to the open socket callback. See CURLOPT_OPENSOCKETDATA(3)

       CURLOPT_CLOSESOCKETFUNCTION
              Callback for closing socket. See CURLOPT_CLOSESOCKETFUNCTION(3)

       CURLOPT_CLOSESOCKETDATA
              Data pointer to pass to the close socket callback. See CURLOPT_CLOSESOCKETDATA(3)

       CURLOPT_PROGRESSFUNCTION
              OBSOLETE callback for progress meter. See CURLOPT_PROGRESSFUNCTION(3)

       CURLOPT_PROGRESSDATA
              Data pointer to pass to the progress meter callback. See CURLOPT_PROGRESSDATA(3)

       CURLOPT_XFERINFOFUNCTION
              Callback for progress meter. See CURLOPT_XFERINFOFUNCTION(3)

       CURLOPT_XFERINFODATA
              Data pointer to pass to the progress meter callback. See CURLOPT_XFERINFODATA(3)

       CURLOPT_HEADERFUNCTION
              Callback for writing received headers. See CURLOPT_HEADERFUNCTION(3)

       CURLOPT_HEADERDATA
              Data pointer to pass to the header callback. See CURLOPT_HEADERDATA(3)

       CURLOPT_DEBUGFUNCTION
              Callback for debug information. See CURLOPT_DEBUGFUNCTION(3)

       CURLOPT_DEBUGDATA
              Data pointer to pass to the debug callback. See CURLOPT_DEBUGDATA(3)

       CURLOPT_SSL_CTX_FUNCTION
              Callback for SSL context logic. See CURLOPT_SSL_CTX_FUNCTION(3)

       CURLOPT_SSL_CTX_DATA
              Data pointer to pass to the SSL context callback. See CURLOPT_SSL_CTX_DATA(3)

       CURLOPT_CONV_TO_NETWORK_FUNCTION
              Callback for code base conversion. See CURLOPT_CONV_TO_NETWORK_FUNCTION(3)

       CURLOPT_CONV_FROM_NETWORK_FUNCTION
              Callback for code base conversion. See CURLOPT_CONV_FROM_NETWORK_FUNCTION(3)

       CURLOPT_CONV_FROM_UTF8_FUNCTION
              Callback for code base conversion. See CURLOPT_CONV_FROM_UTF8_FUNCTION(3)

       CURLOPT_INTERLEAVEFUNCTION
              Callback for RTSP interleaved data. See CURLOPT_INTERLEAVEFUNCTION(3)

       CURLOPT_INTERLEAVEDATA
              Data pointer to pass to the RTSP interleave callback. See CURLOPT_INTERLEAVEDATA(3)

       CURLOPT_CHUNK_BGN_FUNCTION
              Callback for wildcard download start of chunk. See CURLOPT_CHUNK_BGN_FUNCTION(3)

       CURLOPT_CHUNK_END_FUNCTION
              Callback for wildcard download end of chunk. See CURLOPT_CHUNK_END_FUNCTION(3)

       CURLOPT_CHUNK_DATA
              Data pointer to pass to the chunk callbacks. See CURLOPT_CHUNK_DATA(3)

       CURLOPT_FNMATCH_FUNCTION
              Callback for wildcard matching. See CURLOPT_FNMATCH_FUNCTION(3)

       CURLOPT_FNMATCH_DATA
              Data pointer to pass to the wildcard matching callback. See CURLOPT_FNMATCH_DATA(3)

       CURLOPT_SUPPRESS_CONNECT_HEADERS
              Suppress   proxy   CONNECT   response   headers   from    user    callbacks.    See
              CURLOPT_SUPPRESS_CONNECT_HEADERS(3)

       CURLOPT_RESOLVER_START_FUNCTION
              Callback   to   be   called   before   a   new  resolve  request  is  started.  See
              CURLOPT_RESOLVER_START_FUNCTION(3)

       CURLOPT_RESOLVER_START_DATA
              Data pointer to pass to resolver start callback. See CURLOPT_RESOLVER_START_DATA(3)

ERROR OPTIONS

       CURLOPT_ERRORBUFFER
              Error message buffer. See CURLOPT_ERRORBUFFER(3)

       CURLOPT_STDERR
              stderr replacement stream. See CURLOPT_STDERR(3)

       CURLOPT_FAILONERROR
              Fail on HTTP 4xx errors. CURLOPT_FAILONERROR(3)

       CURLOPT_KEEP_SENDING_ON_ERROR
              Keep sending on HTTP >= 300 errors. CURLOPT_KEEP_SENDING_ON_ERROR(3)

NETWORK OPTIONS

       CURLOPT_URL
              URL to work on. See CURLOPT_URL(3)

       CURLOPT_PATH_AS_IS
              Disable squashing /../ and /./ sequences in the path. See CURLOPT_PATH_AS_IS(3)

       CURLOPT_PROTOCOLS
              Allowed protocols. See CURLOPT_PROTOCOLS(3)

       CURLOPT_REDIR_PROTOCOLS
              Protocols to allow redirects to. See CURLOPT_REDIR_PROTOCOLS(3)

       CURLOPT_DEFAULT_PROTOCOL
              Default protocol. See CURLOPT_DEFAULT_PROTOCOL(3)

       CURLOPT_PROXY
              Proxy to use. See CURLOPT_PROXY(3)

       CURLOPT_PRE_PROXY
              Socks proxy to use. See CURLOPT_PRE_PROXY(3)

       CURLOPT_PROXYPORT
              Proxy port to use. See CURLOPT_PROXYPORT(3)

       CURLOPT_PROXYTYPE
              Proxy type. See CURLOPT_PROXYTYPE(3)

       CURLOPT_NOPROXY
              Filter out hosts from proxy use. CURLOPT_NOPROXY(3)

       CURLOPT_HTTPPROXYTUNNEL
              Tunnel through the HTTP proxy. CURLOPT_HTTPPROXYTUNNEL(3)

       CURLOPT_CONNECT_TO
              Connect to a specific host and port. See CURLOPT_CONNECT_TO(3)

       CURLOPT_SOCKS5_AUTH
              Socks5 authentication methods. See CURLOPT_SOCKS5_AUTH(3)

       CURLOPT_SOCKS5_GSSAPI_SERVICE
              Socks5 GSSAPI service name. CURLOPT_SOCKS5_GSSAPI_SERVICE(3)

       CURLOPT_SOCKS5_GSSAPI_NEC
              Socks5 GSSAPI NEC mode. See CURLOPT_SOCKS5_GSSAPI_NEC(3)

       CURLOPT_PROXY_SERVICE_NAME
              Proxy authentication service name. CURLOPT_PROXY_SERVICE_NAME(3)

       CURLOPT_HAPROXYPROTOCOL
              Send an HAProxy PROXY protocol v1 header. See CURLOPT_HAPROXYPROTOCOL(3)

       CURLOPT_SERVICE_NAME
              Authentication service name. CURLOPT_SERVICE_NAME(3)

       CURLOPT_INTERFACE
              Bind connection locally to this. See CURLOPT_INTERFACE(3)

       CURLOPT_LOCALPORT
              Bind connection locally to this port. See CURLOPT_LOCALPORT(3)

       CURLOPT_LOCALPORTRANGE
              Bind connection locally to port range. See CURLOPT_LOCALPORTRANGE(3)

       CURLOPT_DNS_CACHE_TIMEOUT
              Timeout for DNS cache. See CURLOPT_DNS_CACHE_TIMEOUT(3)

       CURLOPT_DNS_USE_GLOBAL_CACHE
              OBSOLETE Enable global DNS cache. See CURLOPT_DNS_USE_GLOBAL_CACHE(3)

       CURLOPT_DOH_URL
              Use this DOH server for name resolves. See CURLOPT_DOH_URL(3)

       CURLOPT_BUFFERSIZE
              Ask for alternate buffer size. See CURLOPT_BUFFERSIZE(3)

       CURLOPT_PORT
              Port number to connect to. See CURLOPT_PORT(3)

       CURLOPT_TCP_FASTOPEN
              Enable TFO, TCP Fast Open. See CURLOPT_TCP_FASTOPEN(3)

       CURLOPT_TCP_NODELAY
              Disable the Nagle algorithm. See CURLOPT_TCP_NODELAY(3)

       CURLOPT_ADDRESS_SCOPE
              IPv6 scope for local addresses. See CURLOPT_ADDRESS_SCOPE(3)

       CURLOPT_TCP_KEEPALIVE
              Enable TCP keep-alive. See CURLOPT_TCP_KEEPALIVE(3)

       CURLOPT_TCP_KEEPIDLE
              Idle time before sending keep-alive. See CURLOPT_TCP_KEEPIDLE(3)

       CURLOPT_TCP_KEEPINTVL
              Interval between keep-alive probes. See CURLOPT_TCP_KEEPINTVL(3)

       CURLOPT_UNIX_SOCKET_PATH
              Path to a Unix domain socket. See CURLOPT_UNIX_SOCKET_PATH(3)

       CURLOPT_ABSTRACT_UNIX_SOCKET
              Path to an abstract Unix domain socket. See CURLOPT_ABSTRACT_UNIX_SOCKET(3)

NAMES and PASSWORDS OPTIONS (Authentication)

       CURLOPT_NETRC
              Enable .netrc parsing. See CURLOPT_NETRC(3)

       CURLOPT_NETRC_FILE
              .netrc file name. See CURLOPT_NETRC_FILE(3)

       CURLOPT_USERPWD
              User name and password. See CURLOPT_USERPWD(3)

       CURLOPT_PROXYUSERPWD
              Proxy user name and password. See CURLOPT_PROXYUSERPWD(3)

       CURLOPT_USERNAME
              User name. See CURLOPT_USERNAME(3)

       CURLOPT_PASSWORD
              Password. See CURLOPT_PASSWORD(3)

       CURLOPT_LOGIN_OPTIONS
              Login options. See CURLOPT_LOGIN_OPTIONS(3)

       CURLOPT_PROXYUSERNAME
              Proxy user name. See CURLOPT_PROXYUSERNAME(3)

       CURLOPT_PROXYPASSWORD
              Proxy password. See CURLOPT_PROXYPASSWORD(3)

       CURLOPT_HTTPAUTH
              HTTP server authentication methods. See CURLOPT_HTTPAUTH(3)

       CURLOPT_TLSAUTH_USERNAME
              TLS authentication user name. See CURLOPT_TLSAUTH_USERNAME(3)

       CURLOPT_PROXY_TLSAUTH_USERNAME
              Proxy TLS authentication user name. See CURLOPT_PROXY_TLSAUTH_USERNAME(3)

       CURLOPT_TLSAUTH_PASSWORD
              TLS authentication password. See CURLOPT_TLSAUTH_PASSWORD(3)

       CURLOPT_PROXY_TLSAUTH_PASSWORD
              Proxy TLS authentication password. See CURLOPT_PROXY_TLSAUTH_PASSWORD(3)

       CURLOPT_TLSAUTH_TYPE
              TLS authentication methods. See CURLOPT_TLSAUTH_TYPE(3)

       CURLOPT_PROXY_TLSAUTH_TYPE
              Proxy TLS authentication methods. See CURLOPT_PROXY_TLSAUTH_TYPE(3)

       CURLOPT_PROXYAUTH
              HTTP proxy authentication methods. See CURLOPT_PROXYAUTH(3)

       CURLOPT_SASL_IR
              Enable SASL initial response. See CURLOPT_SASL_IR(3)

       CURLOPT_XOAUTH2_BEARER
              OAuth2 bearer token. See CURLOPT_XOAUTH2_BEARER(3)

       CURLOPT_DISALLOW_USERNAME_IN_URL
              Don't allow username in URL. See CURLOPT_DISALLOW_USERNAME_IN_URL(3)

HTTP OPTIONS

       CURLOPT_AUTOREFERER
              Automatically set Referer: header. See CURLOPT_AUTOREFERER(3)

       CURLOPT_ACCEPT_ENCODING
              Accept-Encoding and automatic decompressing data. See CURLOPT_ACCEPT_ENCODING(3)

       CURLOPT_TRANSFER_ENCODING
              Request Transfer-Encoding. See CURLOPT_TRANSFER_ENCODING(3)

       CURLOPT_FOLLOWLOCATION
              Follow HTTP redirects. See CURLOPT_FOLLOWLOCATION(3)

       CURLOPT_UNRESTRICTED_AUTH
              Do not restrict authentication to original host. CURLOPT_UNRESTRICTED_AUTH(3)

       CURLOPT_MAXREDIRS
              Maximum number of redirects to follow. See CURLOPT_MAXREDIRS(3)

       CURLOPT_POSTREDIR
              How to act on redirects after POST. See CURLOPT_POSTREDIR(3)

       CURLOPT_PUT
              Issue an HTTP PUT request. See CURLOPT_PUT(3)

       CURLOPT_POST
              Issue an HTTP POST request. See CURLOPT_POST(3)

       CURLOPT_POSTFIELDS
              Send a POST with this data. See CURLOPT_POSTFIELDS(3)

       CURLOPT_POSTFIELDSIZE
              The POST data is this big. See CURLOPT_POSTFIELDSIZE(3)

       CURLOPT_POSTFIELDSIZE_LARGE
              The POST data is this big. See CURLOPT_POSTFIELDSIZE_LARGE(3)

       CURLOPT_COPYPOSTFIELDS
              Send a POST with this data - and copy it. See CURLOPT_COPYPOSTFIELDS(3)

       CURLOPT_HTTPPOST
              Multipart formpost HTTP POST. See CURLOPT_HTTPPOST(3)

       CURLOPT_REFERER
              Referer: header. See CURLOPT_REFERER(3)

       CURLOPT_USERAGENT
              User-Agent: header. See CURLOPT_USERAGENT(3)

       CURLOPT_HTTPHEADER
              Custom HTTP headers. See CURLOPT_HTTPHEADER(3)

       CURLOPT_HEADEROPT
              Control custom headers. See CURLOPT_HEADEROPT(3)

       CURLOPT_PROXYHEADER
              Custom HTTP headers sent to proxy. See CURLOPT_PROXYHEADER(3)

       CURLOPT_HTTP200ALIASES
              Alternative versions of 200 OK. See CURLOPT_HTTP200ALIASES(3)

       CURLOPT_COOKIE
              Cookie(s) to send. See CURLOPT_COOKIE(3)

       CURLOPT_COOKIEFILE
              File to read cookies from. See CURLOPT_COOKIEFILE(3)

       CURLOPT_COOKIEJAR
              File to write cookies to. See CURLOPT_COOKIEJAR(3)

       CURLOPT_COOKIESESSION
              Start a new cookie session. See CURLOPT_COOKIESESSION(3)

       CURLOPT_COOKIELIST
              Add or control cookies. See CURLOPT_COOKIELIST(3)

       CURLOPT_HTTPGET
              Do an HTTP GET request. See CURLOPT_HTTPGET(3)

       CURLOPT_REQUEST_TARGET
              Set the request target. CURLOPT_REQUEST_TARGET(3)

       CURLOPT_HTTP_VERSION
              HTTP version to use. CURLOPT_HTTP_VERSION(3)

       CURLOPT_HTTP09_ALLOWED
              Allow HTTP/0.9 responses. CURLOPT_HTTP09_ALLOWED(3)

       CURLOPT_IGNORE_CONTENT_LENGTH
              Ignore Content-Length. See CURLOPT_IGNORE_CONTENT_LENGTH(3)

       CURLOPT_HTTP_CONTENT_DECODING
              Disable Content decoding. See CURLOPT_HTTP_CONTENT_DECODING(3)

       CURLOPT_HTTP_TRANSFER_DECODING
              Disable Transfer decoding. See CURLOPT_HTTP_TRANSFER_DECODING(3)

       CURLOPT_EXPECT_100_TIMEOUT_MS
              100-continue timeout. See CURLOPT_EXPECT_100_TIMEOUT_MS(3)

       CURLOPT_TRAILERFUNCTION
              Set callback for sending trailing headers. See CURLOPT_TRAILERFUNCTION(3)

       CURLOPT_TRAILERDATA
              Custom pointer passed to the trailing headers callback. See CURLOPT_TRAILERDATA(3)

       CURLOPT_PIPEWAIT
              Wait on connection to pipeline on it. See CURLOPT_PIPEWAIT(3)

       CURLOPT_STREAM_DEPENDS
              This HTTP/2 stream depends on another. See CURLOPT_STREAM_DEPENDS(3)

       CURLOPT_STREAM_DEPENDS_E
              This HTTP/2 stream depends on another exclusively. See CURLOPT_STREAM_DEPENDS_E(3)

       CURLOPT_STREAM_WEIGHT
              Set this HTTP/2 stream's weight. See CURLOPT_STREAM_WEIGHT(3)

SMTP OPTIONS

       CURLOPT_MAIL_FROM
              Address of the sender. See CURLOPT_MAIL_FROM(3)

       CURLOPT_MAIL_RCPT
              Address of the recipients. See CURLOPT_MAIL_RCPT(3)

       CURLOPT_MAIL_AUTH
              Authentication address. See CURLOPT_MAIL_AUTH(3)

TFTP OPTIONS

       CURLOPT_TFTP_BLKSIZE
              TFTP block size. See CURLOPT_TFTP_BLKSIZE(3)

       CURLOPT_TFTP_NO_OPTIONS
              Do not send TFTP options requests. See CURLOPT_TFTP_NO_OPTIONS(3)

FTP OPTIONS

       CURLOPT_FTPPORT
              Use active FTP. See CURLOPT_FTPPORT(3)

       CURLOPT_QUOTE
              Commands to run before transfer. See CURLOPT_QUOTE(3)

       CURLOPT_POSTQUOTE
              Commands to run after transfer. See CURLOPT_POSTQUOTE(3)

       CURLOPT_PREQUOTE
              Commands to run just before transfer. See CURLOPT_PREQUOTE(3)

       CURLOPT_APPEND
              Append to remote file. See CURLOPT_APPEND(3)

       CURLOPT_FTP_USE_EPRT
              Use EPTR. See CURLOPT_FTP_USE_EPRT(3)

       CURLOPT_FTP_USE_EPSV
              Use EPSV. See CURLOPT_FTP_USE_EPSV(3)

       CURLOPT_FTP_USE_PRET
              Use PRET. See CURLOPT_FTP_USE_PRET(3)

       CURLOPT_FTP_CREATE_MISSING_DIRS
              Create     missing     directories     on     the      remote      server.      See
              CURLOPT_FTP_CREATE_MISSING_DIRS(3)

       CURLOPT_FTP_RESPONSE_TIMEOUT
              Timeout for FTP responses. See CURLOPT_FTP_RESPONSE_TIMEOUT(3)

       CURLOPT_FTP_ALTERNATIVE_TO_USER
              Alternative to USER. See CURLOPT_FTP_ALTERNATIVE_TO_USER(3)

       CURLOPT_FTP_SKIP_PASV_IP
              Ignore the IP address in the PASV response. See CURLOPT_FTP_SKIP_PASV_IP(3)

       CURLOPT_FTPSSLAUTH
              Control how to do TLS. See CURLOPT_FTPSSLAUTH(3)

       CURLOPT_FTP_SSL_CCC
              Back to non-TLS again after authentication. See CURLOPT_FTP_SSL_CCC(3)

       CURLOPT_FTP_ACCOUNT
              Send ACCT command. See CURLOPT_FTP_ACCOUNT(3)

       CURLOPT_FTP_FILEMETHOD
              Specify how to reach files. See CURLOPT_FTP_FILEMETHOD(3)

RTSP OPTIONS

       CURLOPT_RTSP_REQUEST
              RTSP request. See CURLOPT_RTSP_REQUEST(3)

       CURLOPT_RTSP_SESSION_ID
              RTSP session-id. See CURLOPT_RTSP_SESSION_ID(3)

       CURLOPT_RTSP_STREAM_URI
              RTSP stream URI. See CURLOPT_RTSP_STREAM_URI(3)

       CURLOPT_RTSP_TRANSPORT
              RTSP Transport: header. See CURLOPT_RTSP_TRANSPORT(3)

       CURLOPT_RTSP_CLIENT_CSEQ
              Client CSEQ number. See CURLOPT_RTSP_CLIENT_CSEQ(3)

       CURLOPT_RTSP_SERVER_CSEQ
              CSEQ number for RTSP Server->Client request. See CURLOPT_RTSP_SERVER_CSEQ(3)

PROTOCOL OPTIONS

       CURLOPT_TRANSFERTEXT
              Use text transfer. See CURLOPT_TRANSFERTEXT(3)

       CURLOPT_PROXY_TRANSFER_MODE
              Add transfer mode to URL over proxy. See CURLOPT_PROXY_TRANSFER_MODE(3)

       CURLOPT_CRLF
              Convert newlines. See CURLOPT_CRLF(3)

       CURLOPT_RANGE
              Range requests. See CURLOPT_RANGE(3)

       CURLOPT_RESUME_FROM
              Resume a transfer. See CURLOPT_RESUME_FROM(3)

       CURLOPT_RESUME_FROM_LARGE
              Resume a transfer. See CURLOPT_RESUME_FROM_LARGE(3)

       CURLOPT_CURLU
              Set URL to work on with CURLU *. See CURLOPT_CURLU(3)

       CURLOPT_CUSTOMREQUEST
              Custom request/method. See CURLOPT_CUSTOMREQUEST(3)

       CURLOPT_FILETIME
              Request file modification date and time. See CURLOPT_FILETIME(3)

       CURLOPT_DIRLISTONLY
              List only. See CURLOPT_DIRLISTONLY(3)

       CURLOPT_NOBODY
              Do not get the body contents. See CURLOPT_NOBODY(3)

       CURLOPT_INFILESIZE
              Size of file to send. CURLOPT_INFILESIZE(3)

       CURLOPT_INFILESIZE_LARGE
              Size of file to send. CURLOPT_INFILESIZE_LARGE(3)

       CURLOPT_UPLOAD
              Upload data. See CURLOPT_UPLOAD(3)

       CURLOPT_UPLOAD_BUFFERSIZE
              Set upload buffer size. See CURLOPT_UPLOAD_BUFFERSIZE(3)

       CURLOPT_MIMEPOST
              Post/send MIME data. See CURLOPT_MIMEPOST(3)

       CURLOPT_MAXFILESIZE
              Maximum file size to get. See CURLOPT_MAXFILESIZE(3)

       CURLOPT_MAXFILESIZE_LARGE
              Maximum file size to get. See CURLOPT_MAXFILESIZE_LARGE(3)

       CURLOPT_TIMECONDITION
              Make a time conditional request. See CURLOPT_TIMECONDITION(3)

       CURLOPT_TIMEVALUE
              Time value for the time conditional request. See CURLOPT_TIMEVALUE(3)

       CURLOPT_TIMEVALUE_LARGE
              Time value for the time conditional request. See CURLOPT_TIMEVALUE_LARGE(3)

CONNECTION OPTIONS

       CURLOPT_TIMEOUT
              Timeout for the entire request. See CURLOPT_TIMEOUT(3)

       CURLOPT_TIMEOUT_MS
              Millisecond timeout for the entire request. See CURLOPT_TIMEOUT_MS(3)

       CURLOPT_LOW_SPEED_LIMIT
              Low speed limit to abort transfer. See CURLOPT_LOW_SPEED_LIMIT(3)

       CURLOPT_LOW_SPEED_TIME
              Time    to    be    below   the   speed   to   trigger   low   speed   abort.   See
              CURLOPT_LOW_SPEED_TIME(3)

       CURLOPT_MAX_SEND_SPEED_LARGE
              Cap the upload speed to this. See CURLOPT_MAX_SEND_SPEED_LARGE(3)

       CURLOPT_MAX_RECV_SPEED_LARGE
              Cap the download speed to this. See CURLOPT_MAX_RECV_SPEED_LARGE(3)

       CURLOPT_MAXCONNECTS
              Maximum number of connections in the connection pool. See CURLOPT_MAXCONNECTS(3)

       CURLOPT_FRESH_CONNECT
              Use a new connection. CURLOPT_FRESH_CONNECT(3)

       CURLOPT_FORBID_REUSE
              Prevent subsequent connections from re-using this. See CURLOPT_FORBID_REUSE(3)

       CURLOPT_CONNECTTIMEOUT
              Timeout for the connection phase. See CURLOPT_CONNECTTIMEOUT(3)

       CURLOPT_CONNECTTIMEOUT_MS
              Millisecond timeout for the connection phase. See CURLOPT_CONNECTTIMEOUT_MS(3)

       CURLOPT_IPRESOLVE
              IP version to resolve to. See CURLOPT_IPRESOLVE(3)

       CURLOPT_CONNECT_ONLY
              Only connect, nothing else. See CURLOPT_CONNECT_ONLY(3)

       CURLOPT_USE_SSL
              Use TLS/SSL. See CURLOPT_USE_SSL(3)

       CURLOPT_RESOLVE
              Provide fixed/fake name resolves. See CURLOPT_RESOLVE(3)

       CURLOPT_DNS_INTERFACE
              Bind name resolves to this interface. See CURLOPT_DNS_INTERFACE(3)

       CURLOPT_DNS_LOCAL_IP4
              Bind name resolves to this IP4 address. See CURLOPT_DNS_LOCAL_IP4(3)

       CURLOPT_DNS_LOCAL_IP6
              Bind name resolves to this IP6 address. See CURLOPT_DNS_LOCAL_IP6(3)

       CURLOPT_DNS_SERVERS
              Preferred DNS servers. See CURLOPT_DNS_SERVERS(3)

       CURLOPT_DNS_SHUFFLE_ADDRESSES
              Shuffle addresses before use. See CURLOPT_DNS_SHUFFLE_ADDRESSES(3)

       CURLOPT_ACCEPTTIMEOUT_MS
              Timeout  for  waiting  for  the  server's  connect  back  to   be   accepted.   See
              CURLOPT_ACCEPTTIMEOUT_MS(3)

       CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS
              Timeout for happy eyeballs. See CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS(3)

       CURLOPT_UPKEEP_INTERVAL_MS
              Sets    the    interval   at   which   connection   upkeep   are   performed.   See
              CURLOPT_UPKEEP_INTERVAL_MS(3)

SSL and SECURITY OPTIONS

       CURLOPT_SSLCERT
              Client cert. See CURLOPT_SSLCERT(3)

       CURLOPT_PROXY_SSLCERT
              Proxy client cert. See CURLOPT_PROXY_SSLCERT(3)

       CURLOPT_SSLCERTTYPE
              Client cert type.  See CURLOPT_SSLCERTTYPE(3)

       CURLOPT_PROXY_SSLCERTTYPE
              Proxy client cert type.  See CURLOPT_PROXY_SSLCERTTYPE(3)

       CURLOPT_SSLKEY
              Client key. See CURLOPT_SSLKEY(3)

       CURLOPT_PROXY_SSLKEY
              Proxy client key. See CURLOPT_PROXY_SSLKEY(3)

       CURLOPT_SSLKEYTYPE
              Client key type. See CURLOPT_SSLKEYTYPE(3)

       CURLOPT_PROXY_SSLKEYTYPE
              Proxy client key type. See CURLOPT_PROXY_SSLKEYTYPE(3)

       CURLOPT_KEYPASSWD
              Client key password. See CURLOPT_KEYPASSWD(3)

       CURLOPT_PROXY_KEYPASSWD
              Proxy client key password. See CURLOPT_PROXY_KEYPASSWD(3)

       CURLOPT_SSL_ENABLE_ALPN
              Enable use of ALPN. See CURLOPT_SSL_ENABLE_ALPN(3)

       CURLOPT_SSL_ENABLE_NPN
              Enable use of NPN. See CURLOPT_SSL_ENABLE_NPN(3)

       CURLOPT_SSLENGINE
              Use identifier with SSL engine. See CURLOPT_SSLENGINE(3)

       CURLOPT_SSLENGINE_DEFAULT
              Default SSL engine. See CURLOPT_SSLENGINE_DEFAULT(3)

       CURLOPT_SSL_FALSESTART
              Enable TLS False Start. See CURLOPT_SSL_FALSESTART(3)

       CURLOPT_SSLVERSION
              SSL version to use. See CURLOPT_SSLVERSION(3)

       CURLOPT_PROXY_SSLVERSION
              Proxy SSL version to use. See CURLOPT_PROXY_SSLVERSION(3)

       CURLOPT_SSL_VERIFYHOST
              Verify the host name in the SSL certificate. See CURLOPT_SSL_VERIFYHOST(3)

       CURLOPT_PROXY_SSL_VERIFYHOST
              Verify    the    host    name    in    the    proxy    SSL     certificate.     See
              CURLOPT_PROXY_SSL_VERIFYHOST(3)

       CURLOPT_SSL_VERIFYPEER
              Verify the SSL certificate. See CURLOPT_SSL_VERIFYPEER(3)

       CURLOPT_PROXY_SSL_VERIFYPEER
              Verify the proxy SSL certificate. See CURLOPT_PROXY_SSL_VERIFYPEER(3)

       CURLOPT_SSL_VERIFYSTATUS
              Verify the SSL certificate's status. See CURLOPT_SSL_VERIFYSTATUS(3)

       CURLOPT_CAINFO
              CA cert bundle. See CURLOPT_CAINFO(3)

       CURLOPT_PROXY_CAINFO
              Proxy CA cert bundle. See CURLOPT_PROXY_CAINFO(3)

       CURLOPT_ISSUERCERT
              Issuer certificate. See CURLOPT_ISSUERCERT(3)

       CURLOPT_CAPATH
              Path to CA cert bundle. See CURLOPT_CAPATH(3)

       CURLOPT_PROXY_CAPATH
              Path to proxy CA cert bundle. See CURLOPT_PROXY_CAPATH(3)

       CURLOPT_CRLFILE
              Certificate Revocation List. See CURLOPT_CRLFILE(3)

       CURLOPT_PROXY_CRLFILE
              Proxy Certificate Revocation List. See CURLOPT_PROXY_CRLFILE(3)

       CURLOPT_CERTINFO
              Extract certificate info. See CURLOPT_CERTINFO(3)

       CURLOPT_PINNEDPUBLICKEY
              Set pinned SSL public key . See CURLOPT_PINNEDPUBLICKEY(3)

       CURLOPT_PROXY_PINNEDPUBLICKEY
              Set the proxy's pinned SSL public key. See CURLOPT_PROXY_PINNEDPUBLICKEY(3)

       CURLOPT_RANDOM_FILE
              Provide source for entropy random data. See CURLOPT_RANDOM_FILE(3)

       CURLOPT_EGDSOCKET
              Identify EGD socket for entropy. See CURLOPT_EGDSOCKET(3)

       CURLOPT_SSL_CIPHER_LIST
              Ciphers to use. See CURLOPT_SSL_CIPHER_LIST(3)

       CURLOPT_PROXY_SSL_CIPHER_LIST
              Proxy ciphers to use. See CURLOPT_PROXY_SSL_CIPHER_LIST(3)

       CURLOPT_TLS13_CIPHERS
              TLS 1.3 cipher suites to use. See CURLOPT_TLS13_CIPHERS(3)

       CURLOPT_PROXY_TLS13_CIPHERS
              Proxy TLS 1.3 cipher suites to use. See CURLOPT_PROXY_TLS13_CIPHERS(3)

       CURLOPT_SSL_SESSIONID_CACHE
              Disable SSL session-id cache. See CURLOPT_SSL_SESSIONID_CACHE(3)

       CURLOPT_SSL_OPTIONS
              Control SSL behavior. See CURLOPT_SSL_OPTIONS(3)

       CURLOPT_PROXY_SSL_OPTIONS
              Control proxy SSL behavior. See CURLOPT_PROXY_SSL_OPTIONS(3)

       CURLOPT_KRBLEVEL
              Kerberos security level. See CURLOPT_KRBLEVEL(3)

       CURLOPT_GSSAPI_DELEGATION
              Disable GSS-API delegation. See CURLOPT_GSSAPI_DELEGATION(3)

SSH OPTIONS

       CURLOPT_SSH_AUTH_TYPES
              SSH authentication types. See CURLOPT_SSH_AUTH_TYPES(3)

       CURLOPT_SSH_COMPRESSION
              Enable SSH compression. See CURLOPT_SSH_COMPRESSION(3)

       CURLOPT_SSH_HOST_PUBLIC_KEY_MD5
              MD5 of host's public key. See CURLOPT_SSH_HOST_PUBLIC_KEY_MD5(3)

       CURLOPT_SSH_PUBLIC_KEYFILE
              File name of public key. See CURLOPT_SSH_PUBLIC_KEYFILE(3)

       CURLOPT_SSH_PRIVATE_KEYFILE
              File name of private key. See CURLOPT_SSH_PRIVATE_KEYFILE(3)

       CURLOPT_SSH_KNOWNHOSTS
              File name with known hosts. See CURLOPT_SSH_KNOWNHOSTS(3)

       CURLOPT_SSH_KEYFUNCTION
              Callback for known hosts handling. See CURLOPT_SSH_KEYFUNCTION(3)

       CURLOPT_SSH_KEYDATA
              Custom pointer to pass to ssh key callback. See CURLOPT_SSH_KEYDATA(3)

OTHER OPTIONS

       CURLOPT_PRIVATE
              Private pointer to store. See CURLOPT_PRIVATE(3)

       CURLOPT_SHARE
              Share object to use. See CURLOPT_SHARE(3)

       CURLOPT_NEW_FILE_PERMS
              Mode for creating new remote files. See CURLOPT_NEW_FILE_PERMS(3)

       CURLOPT_NEW_DIRECTORY_PERMS
              Mode for creating new remote directories. See CURLOPT_NEW_DIRECTORY_PERMS(3)

TELNET OPTIONS

       CURLOPT_TELNETOPTIONS
              TELNET options. See CURLOPT_TELNETOPTIONS(3)

RETURN VALUE

       CURLE_OK  (zero)  means that the option was set properly, non-zero means an error occurred
       as <curl/curl.h> defines. See the libcurl-errors(3)  man  page  for  the  full  list  with
       descriptions.

       If  you  try to set an option that libcurl doesn't know about, perhaps because the library
       is too old to support it or the option was removed in a recent version, this function will
       return  CURLE_UNKNOWN_OPTION.  If  support for the option was disabled at compile-time, it
       will return CURLE_NOT_BUILT_IN.

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         CURLcode res;
         curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
         res = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

SEE ALSO

       curl_easy_init(3),   curl_easy_cleanup(3),    curl_easy_reset(3),    curl_easy_getinfo(3),
       curl_multi_setopt(3),