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<title>libcurl-errors man page</title>
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<p class="level0"><a name="NAME"></a><h2 class="nroffsh">NAME</h2>
<p class="level0">libcurl-errors - error codes in libcurl <a name="DESCRIPTION"></a><h2 class="nroffsh">DESCRIPTION</h2>
<p class="level0">This man page includes most, if not all, available error codes in libcurl. Why they occur and possibly what you can do to fix the problem. <a name="CURLcode"></a><h2 class="nroffsh">CURLcode</h2>
<p class="level0">Almost all "easy" interface functions return a CURLcode error code. No matter what, using <span Class="emphasis">CURLOPT_ERRORBUFFER</span> is a good idea as it will give you a human readable error string that may offer more details about the error cause than just the error code does. 
<p class="level0">CURLcode is one of the following: 
<p class="level0"><a name="CURLEOK"></a><span class="nroffip">CURLE_OK (0)</span> 
<p class="level1">All fine. Proceed as usual. 
<p class="level0"><a name="CURLEUNSUPPORTEDPROTOCOL"></a><span class="nroffip">CURLE_UNSUPPORTED_PROTOCOL (1)</span> 
<p class="level1">The URL you passed to libcurl used a protocol that this libcurl does not support. The support might be a compile-time option that you didn't use, it can be a misspelled protocol string or just a protocol libcurl has no code for. 
<p class="level0"><a name="CURLEFAILEDINIT"></a><span class="nroffip">CURLE_FAILED_INIT (2)</span> 
<p class="level1">Very early initialization code failed. This is likely to be an internal error or problem. 
<p class="level0"><a name="CURLEURLMALFORMAT"></a><span class="nroffip">CURLE_URL_MALFORMAT (3)</span> 
<p class="level1">The URL was not properly formatted. 
<p class="level0"><a name="CURLEURLMALFORMATUSER"></a><span class="nroffip">CURLE_URL_MALFORMAT_USER (4)</span> 
<p class="level1">URL user malformatted. The user-part of the URL syntax was not correct. 
<p class="level0"><a name="CURLECOULDNTRESOLVEPROXY"></a><span class="nroffip">CURLE_COULDNT_RESOLVE_PROXY (5)</span> 
<p class="level1">Couldn't resolve proxy. The given proxy host could not be resolved. 
<p class="level0"><a name="CURLECOULDNTRESOLVEHOST"></a><span class="nroffip">CURLE_COULDNT_RESOLVE_HOST (6)</span> 
<p class="level1">Couldn't resolve host. The given remote host was not resolved. 
<p class="level0"><a name="CURLECOULDNTCONNECT"></a><span class="nroffip">CURLE_COULDNT_CONNECT (7)</span> 
<p class="level1">Failed to connect() to host or proxy. 
<p class="level0"><a name="CURLEFTPWEIRDSERVERREPLY"></a><span class="nroffip">CURLE_FTP_WEIRD_SERVER_REPLY (8)</span> 
<p class="level1">After connecting to a FTP server, libcurl expects to get a certain reply back. This error code implies that it god a strange or bad reply. The given remote server is probably not an OK FTP server. 
<p class="level0"><a name="CURLEFTPACCESSDENIED"></a><span class="nroffip">CURLE_FTP_ACCESS_DENIED (9)</span> 
<p class="level1">We were denied access when trying to login to an FTP server or when trying to change working directory to the one given in the URL. 
<p class="level0"><a name="CURLEFTPUSERPASSWORDINCORRECT"></a><span class="nroffip">CURLE_FTP_USER_PASSWORD_INCORRECT (10)</span> 
<p class="level1">The username and/or the password were incorrect when trying to login to an FTP server. 
<p class="level0"><a name="CURLEFTPWEIRDPASSREPLY"></a><span class="nroffip">CURLE_FTP_WEIRD_PASS_REPLY (11)</span> 
<p class="level1">After having sent the FTP password to the server, libcurl expects a proper reply. This error code indicates that an unexpected code was returned. 
<p class="level0"><a name="CURLEFTPWEIRDUSERREPLY"></a><span class="nroffip">CURLE_FTP_WEIRD_USER_REPLY (12)</span> 
<p class="level1">After having sent user name to the FTP server, libcurl expects a proper reply. This error code indicates that an unexpected code was returned. 
<p class="level0"><a name="CURLEFTPWEIRDPASVREPLY"></a><span class="nroffip">CURLE_FTP_WEIRD_PASV_REPLY (13)</span> 
<p class="level1">libcurl failed to get a sensible result back from the server as a response to either a PASV or a EPSV command. The server is flawed. 
<p class="level0"><a name="CURLEFTPWEIRD227FORMAT"></a><span class="nroffip">CURLE_FTP_WEIRD_227_FORMAT (14)</span> 
<p class="level1">FTP servers return a 227-line as a response to a PASV command. If libcurl fails to parse that line, this return code is passed back. 
<p class="level0"><a name="CURLEFTPCANTGETHOST"></a><span class="nroffip">CURLE_FTP_CANT_GET_HOST (15)</span> 
<p class="level1">An internal failure to lookup the host used for the new connection. 
<p class="level0"><a name="CURLEFTPCANTRECONNECT"></a><span class="nroffip">CURLE_FTP_CANT_RECONNECT (16)</span> 
<p class="level1">A bad return code on either PASV or EPSV was sent by the FTP server, preventing libcurl from being able to continue. 
<p class="level0"><a name="CURLEFTPCOULDNTSETBINARY"></a><span class="nroffip">CURLE_FTP_COULDNT_SET_BINARY (17)</span> 
<p class="level1">Received an error when trying to set the transfer mode to binary. 
<p class="level0"><a name="CURLEPARTIALFILE"></a><span class="nroffip">CURLE_PARTIAL_FILE (18)</span> 
<p class="level1">A file transfer was shorter or larger than expected. This happens when the server first reports an expected transfer size, and then delivers data that doesn't match the previously given size. 
<p class="level0"><a name="CURLEFTPCOULDNTRETRFILE"></a><span class="nroffip">CURLE_FTP_COULDNT_RETR_FILE (19)</span> 
<p class="level1">This was either a weird reply to a 'RETR' command or a zero byte transfer complete. 
<p class="level0"><a name="CURLEFTPWRITEERROR"></a><span class="nroffip">CURLE_FTP_WRITE_ERROR (20)</span> 
<p class="level1">After a completed file transfer, the FTP server did not respond a proper "transfer successful" code. 
<p class="level0"><a name="CURLEFTPQUOTEERROR"></a><span class="nroffip">CURLE_FTP_QUOTE_ERROR (21)</span> 
<p class="level1">When sending custom "QUOTE" commands to the remote server, one of the commands returned an error code that was 400 or higher. 
<p class="level0"><a name="CURLEHTTPRETURNEDERROR"></a><span class="nroffip">CURLE_HTTP_RETURNED_ERROR (22)</span> 
<p class="level1">This is returned if CURLOPT_FAILONERROR is set TRUE and the HTTP server returns an error code that is &gt;= 400. 
<p class="level0"><a name="CURLEWRITEERROR"></a><span class="nroffip">CURLE_WRITE_ERROR (23)</span> 
<p class="level1">An error occurred when writing received data to a local file, or an error was returned to libcurl from a write callback. 
<p class="level0"><a name="CURLEMALFORMATUSER"></a><span class="nroffip">CURLE_MALFORMAT_USER (24)</span> 
<p class="level1">Malformat user. User name badly specified. *Not currently used* 
<p class="level0"><a name="CURLEFTPCOULDNTSTORFILE"></a><span class="nroffip">CURLE_FTP_COULDNT_STOR_FILE (25)</span> 
<p class="level1">FTP couldn't STOR file. The server denied the STOR operation. The error buffer usually contains the server's explanation to this. 
<p class="level0"><a name="CURLEREADERROR"></a><span class="nroffip">CURLE_READ_ERROR (26)</span> 
<p class="level1">There was a problem reading a local file or an error returned by the read callback. 
<p class="level0"><a name="CURLEOUTOFMEMORY"></a><span class="nroffip">CURLE_OUT_OF_MEMORY (27)</span> 
<p class="level1">Out of memory. A memory allocation request failed. This is serious badness and things are severly screwed up if this ever occur. 
<p class="level0"><a name="CURLEOPERATIONTIMEOUTED"></a><span class="nroffip">CURLE_OPERATION_TIMEOUTED (28)</span> 
<p class="level1">Operation timeout. The specified time-out period was reached according to the conditions. 
<p class="level0"><a name="CURLEFTPCOULDNTSETASCII"></a><span class="nroffip">CURLE_FTP_COULDNT_SET_ASCII (29)</span> 
<p class="level1">libcurl failed to set ASCII transfer type (TYPE A). 
<p class="level0"><a name="CURLEFTPPORTFAILED"></a><span class="nroffip">CURLE_FTP_PORT_FAILED (30)</span> 
<p class="level1">The FTP PORT command returned error. This mostly happen when you haven't specified a good enough address for libcurl to use. See <span Class="emphasis">CURLOPT_FTPPORT</span>. 
<p class="level0"><a name="CURLEFTPCOULDNTUSEREST"></a><span class="nroffip">CURLE_FTP_COULDNT_USE_REST (31)</span> 
<p class="level1">The FTP REST command returned error. This should never happen if the server is sane. 
<p class="level0"><a name="CURLEFTPCOULDNTGETSIZE"></a><span class="nroffip">CURLE_FTP_COULDNT_GET_SIZE (32)</span> 
<p class="level1">The FTP SIZE command returned errror. SIZE is not a kosher FTP command, it is an extension and not all servers support it. This is not a surprising error. 
<p class="level0"><a name="CURLEHTTPRANGEERROR"></a><span class="nroffip">CURLE_HTTP_RANGE_ERROR (33)</span> 
<p class="level1">The HTTP server does not support or accept range requests. 
<p class="level0"><a name="CURLEHTTPPOSTERROR"></a><span class="nroffip">CURLE_HTTP_POST_ERROR (34)</span> 
<p class="level1">This is an odd error that mainly occurs due to internal confusion. 
<p class="level0"><a name="CURLESSLCONNECTERROR"></a><span class="nroffip">CURLE_SSL_CONNECT_ERROR (35)</span> 
<p class="level1">A problem occured somewhere in the SSL/TLS handshake. You really want the error buffer and read the message there as it pinpoints the problem slightly more. Could be certificates (file formats, paths, permissions), passwords, and others. 
<p class="level0"><a name="CURLEFTPBADDOWNLOADRESUME"></a><span class="nroffip">CURLE_FTP_BAD_DOWNLOAD_RESUME (36)</span> 
<p class="level1">Attempting FTP resume beyond file size. 
<p class="level0"><a name="CURLEFILECOULDNTREADFILE"></a><span class="nroffip">CURLE_FILE_COULDNT_READ_FILE (37)</span> 
<p class="level1">A file given with FILE:// couldn't be opened. Most likely because the file path doesn't identify an existing file. Did you check file permissions? 
<p class="level0"><a name="CURLELDAPCANNOTBIND"></a><span class="nroffip">CURLE_LDAP_CANNOT_BIND (38)</span> 
<p class="level1">LDAP cannot bind. LDAP bind operation failed. 
<p class="level0"><a name="CURLELDAPSEARCHFAILED"></a><span class="nroffip">CURLE_LDAP_SEARCH_FAILED (39)</span> 
<p class="level1">LDAP search failed. 
<p class="level0"><a name="CURLELIBRARYNOTFOUND"></a><span class="nroffip">CURLE_LIBRARY_NOT_FOUND (40)</span> 
<p class="level1">Library not found. The LDAP library was not found. 
<p class="level0"><a name="CURLEFUNCTIONNOTFOUND"></a><span class="nroffip">CURLE_FUNCTION_NOT_FOUND (41)</span> 
<p class="level1">Function not found. A required LDAP function was not found. 
<p class="level0"><a name="CURLEABORTEDBYCALLBACK"></a><span class="nroffip">CURLE_ABORTED_BY_CALLBACK (42)</span> 
<p class="level1">Aborted by callback. A callback returned "abort" to libcurl. 
<p class="level0"><a name="CURLEBADFUNCTIONARGUMENT"></a><span class="nroffip">CURLE_BAD_FUNCTION_ARGUMENT (43)</span> 
<p class="level1">Internal error. A function was called with a bad parameter. 
<p class="level0"><a name="CURLEBADCALLINGORDER"></a><span class="nroffip">CURLE_BAD_CALLING_ORDER (44)</span> 
<p class="level1">Internal error. A function was called in a bad order. 
<p class="level0"><a name="CURLEHTTPPORTFAILED"></a><span class="nroffip">CURLE_HTTP_PORT_FAILED (45)</span> 
<p class="level1">Interface error. A specified outgoing interface could not be used. Set which interface to use for outgoing connections' source IP address with CURLOPT_INTERFACE. 
<p class="level0"><a name="CURLEBADPASSWORDENTERED"></a><span class="nroffip">CURLE_BAD_PASSWORD_ENTERED (46)</span> 
<p class="level1">Bad password entered. An error was signaled when the password was entered. This can also be the result of a "bad password" returned from a specified password callback. 
<p class="level0"><a name="CURLETOOMANYREDIRECTS"></a><span class="nroffip">CURLE_TOO_MANY_REDIRECTS (47)</span> 
<p class="level1">Too many redirects. When following redirects, libcurl hit the maximum amount. Set your limit with CURLOPT_MAXREDIRS. 
<p class="level0"><a name="CURLEUNKNOWNTELNETOPTION"></a><span class="nroffip">CURLE_UNKNOWN_TELNET_OPTION (48)</span> 
<p class="level1">An option set with CURLOPT_TELNETOPTIONS was not recognized/known. Refer to the appropriate documentation. 
<p class="level0"><a name="CURLETELNETOPTIONSYNTAX"></a><span class="nroffip">CURLE_TELNET_OPTION_SYNTAX (49)</span> 
<p class="level1">A telnet option string was Illegally formatted. 
<p class="level0"><a name="CURLEOBSOLETE"></a><span class="nroffip">CURLE_OBSOLETE (50)</span> 
<p class="level1">This is not an error. This used to be another error code in an old libcurl version and is currently unused. 
<p class="level0"><a name="CURLESSLPEERCERTIFICATE"></a><span class="nroffip">CURLE_SSL_PEER_CERTIFICATE (51)</span> 
<p class="level1">The remote server's SSL certificate was deemed not OK. 
<p class="level0"><a name="CURLEGOTNOTHING"></a><span class="nroffip">CURLE_GOT_NOTHING (52)</span> 
<p class="level1">Nothing was returned from the server, and under the circumstances, getting nothing is considered an error. 
<p class="level0"><a name="CURLESSLENGINENOTFOUND"></a><span class="nroffip">CURLE_SSL_ENGINE_NOTFOUND (53)</span> 
<p class="level1">The specified crypto engine wasn't found. 
<p class="level0"><a name="CURLESSLENGINESETFAILED"></a><span class="nroffip">CURLE_SSL_ENGINE_SETFAILED (54)</span> 
<p class="level1">Failed setting the selected SSL crypto engine as default! 
<p class="level0"><a name="CURLESENDERROR"></a><span class="nroffip">CURLE_SEND_ERROR (55)</span> 
<p class="level1">Failed sending network data. 
<p class="level0"><a name="CURLERECVERROR"></a><span class="nroffip">CURLE_RECV_ERROR (56)</span> 
<p class="level1">Failure with receiving network data. 
<p class="level0"><a name="CURLERECVERROR"></a><span class="nroffip">CURLE_RECV_ERROR (57)</span> 
<p class="level1">Failure with receiving network data. 
<p class="level0"><a name="CURLESSLCERTPROBLEM"></a><span class="nroffip">CURLE_SSL_CERTPROBLEM (58)</span> 
<p class="level1">problem with the local certificate 
<p class="level0"><a name="CURLESSLCIPHER"></a><span class="nroffip">CURLE_SSL_CIPHER (59)</span> 
<p class="level1">couldn't use specified cipher 
<p class="level0"><a name="CURLESSLCACERT"></a><span class="nroffip">CURLE_SSL_CACERT (60)</span> 
<p class="level1">problem with the CA cert (path? access rights?)  
<p class="level0"><a name="CURLEBADCONTENTENCODING"></a><span class="nroffip">CURLE_BAD_CONTENT_ENCODING (61)</span> 
<p class="level1">Unrecognized transfer encoding 
<p class="level0"><a name="CURLELDAPINVALIDURL"></a><span class="nroffip">CURLE_LDAP_INVALID_URL (62)</span> 
<p class="level1">Invalid LDAP URL 
<p class="level0"><a name="CURLEFILESIZEEXCEEDED"></a><span class="nroffip">CURLE_FILESIZE_EXCEEDED (63)</span> 
<p class="level1">Maximum file size exceeded 
<p class="level0"><a name="CURLEFTPSSLFAILED"></a><span class="nroffip">CURLE_FTP_SSL_FAILED (64)</span> 
<p class="level1">Requested FTP SSL level failed <a name="CURLMcode"></a><h2 class="nroffsh">CURLMcode</h2>
<p class="level0">This is the generic return code used by functions in the libcurl multi interface. 
<p class="level0">This is left to be documented. <a name="CURLSHcode"></a><h2 class="nroffsh">CURLSHcode</h2>
<p class="level0">The "share" interface will return a CURLSHcode to indicate when an  error has occurred.  
<p class="level0">CURLSHcode is one of the following: 
<p class="level0"><a name="CURLSHEOK"></a><span class="nroffip">CURLSHE_OK (0)</span> 
<p class="level1">All fine. Proceed as usual. 
<p class="level0"><a name="CURLSHEBADOPTION"></a><span class="nroffip">CURLSHE_BAD_OPTION (1)</span> 
<p class="level1">An invalid option was passed to the function. 
<p class="level0"><a name="CURLSHEINUSE"></a><span class="nroffip">CURLSHE_IN_USE (2)</span> 
<p class="level1">The share object is currently in use. 
<p class="level0"><a name="CURLSHEINVALID"></a><span class="nroffip">CURLSHE_INVALID (3)</span> 
<p class="level1">An invalid share object was passed to the function. 
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