libcurl-errors.3
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- ." * Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
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- ." * $Id: libcurl-errors.3,v 1.35 2008-12-28 21:56:56 bagder Exp $
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- ."
- .TH libcurl-errors 3 "8 Jun 2008" "libcurl 7.19.0" "libcurl errors"
- .SH NAME
- libcurl-errors - error codes in libcurl
- .SH DESCRIPTION
- 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 are also included.
- .SH "CURLcode"
- Almost all "easy" interface functions return a CURLcode error code. No matter
- what, using the fIcurl_easy_setopt(3)fP option fICURLOPT_ERRORBUFFERfP is
- a good idea as it will give you a human readable error string that may offer
- more details about the cause of the error than just the error code.
- fIcurl_easy_strerror(3)fP can be called to get an error string from a
- given CURLcode number.
- CURLcode is one of the following:
- .IP "CURLE_OK (0)"
- All fine. Proceed as usual.
- .IP "CURLE_UNSUPPORTED_PROTOCOL (1)"
- 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.
- .IP "CURLE_FAILED_INIT (2)"
- Very early initialization code failed. This is likely to be an internal error
- or problem.
- .IP "CURLE_URL_MALFORMAT (3)"
- The URL was not properly formatted.
- .IP "CURLE_COULDNT_RESOLVE_PROXY (5)"
- Couldn't resolve proxy. The given proxy host could not be resolved.
- .IP "CURLE_COULDNT_RESOLVE_HOST (6)"
- Couldn't resolve host. The given remote host was not resolved.
- .IP "CURLE_COULDNT_CONNECT (7)"
- Failed to connect() to host or proxy.
- .IP "CURLE_FTP_WEIRD_SERVER_REPLY (8)"
- After connecting to a FTP server, libcurl expects to get a certain reply
- back. This error code implies that it got a strange or bad reply. The given
- remote server is probably not an OK FTP server.
- .IP "CURLE_REMOTE_ACCESS_DENIED (9)"
- We were denied access to the resource given in the URL. For FTP, this occurs
- while trying to change to the remote directory.
- .IP "CURLE_FTP_WEIRD_PASS_REPLY (11)"
- After having sent the FTP password to the server, libcurl expects a proper
- reply. This error code indicates that an unexpected code was returned.
- .IP "CURLE_FTP_WEIRD_PASV_REPLY (13)"
- 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.
- .IP "CURLE_FTP_WEIRD_227_FORMAT (14)"
- 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.
- .IP "CURLE_FTP_CANT_GET_HOST (15)"
- An internal failure to lookup the host used for the new connection.
- .IP "CURLE_FTP_COULDNT_SET_TYPE (17)"
- Received an error when trying to set the transfer mode to binary or ASCII.
- .IP "CURLE_PARTIAL_FILE (18)"
- 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.
- .IP "CURLE_FTP_COULDNT_RETR_FILE (19)"
- This was either a weird reply to a 'RETR' command or a zero byte transfer
- complete.
- .IP "CURLE_QUOTE_ERROR (21)"
- When sending custom "QUOTE" commands to the remote server, one of the commands
- returned an error code that was 400 or higher (for FTP) or otherwise
- indicated unsuccessful completion of the command.
- .IP "CURLE_HTTP_RETURNED_ERROR (22)"
- This is returned if CURLOPT_FAILONERROR is set TRUE and the HTTP server
- returns an error code that is >= 400. (This error code was formerly known as
- CURLE_HTTP_NOT_FOUND.)
- .IP "CURLE_WRITE_ERROR (23)"
- An error occurred when writing received data to a local file, or an error was
- returned to libcurl from a write callback.
- .IP "CURLE_UPLOAD_FAILED (25)"
- Failed starting the upload. For FTP, the server typically denied the STOR
- command. The error buffer usually contains the server's explanation for this.
- (This error code was formerly known as CURLE_FTP_COULDNT_STOR_FILE.)
- .IP "CURLE_READ_ERROR (26)"
- There was a problem reading a local file or an error returned by the read
- callback.
- .IP "CURLE_OUT_OF_MEMORY (27)"
- A memory allocation request failed. This is serious badness and
- things are severely screwed up if this ever occurs.
- .IP "CURLE_OPERATION_TIMEDOUT (28)"
- Operation timeout. The specified time-out period was reached according to the
- conditions.
- .IP "CURLE_FTP_PORT_FAILED (30)"
- The FTP PORT command returned error. This mostly happens when you haven't
- specified a good enough address for libcurl to use. See fICURLOPT_FTPPORTfP.
- .IP "CURLE_FTP_COULDNT_USE_REST (31)"
- The FTP REST command returned error. This should never happen if the server is
- sane.
- .IP "CURLE_RANGE_ERROR (33)"
- The server does not support or accept range requests.
- .IP "CURLE_HTTP_POST_ERROR (34)"
- This is an odd error that mainly occurs due to internal confusion.
- .IP "CURLE_SSL_CONNECT_ERROR (35)"
- A problem occurred 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.
- .IP "CURLE_FTP_BAD_DOWNLOAD_RESUME (36)"
- Attempting FTP resume beyond file size.
- .IP "CURLE_FILE_COULDNT_READ_FILE (37)"
- 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?
- .IP "CURLE_LDAP_CANNOT_BIND (38)"
- LDAP cannot bind. LDAP bind operation failed.
- .IP "CURLE_LDAP_SEARCH_FAILED (39)"
- LDAP search failed.
- .IP "CURLE_FUNCTION_NOT_FOUND (41)"
- Function not found. A required zlib function was not found.
- .IP "CURLE_ABORTED_BY_CALLBACK (42)"
- Aborted by callback. A callback returned "abort" to libcurl.
- .IP "CURLE_BAD_FUNCTION_ARGUMENT (43)"
- Internal error. A function was called with a bad parameter.
- .IP "CURLE_INTERFACE_FAILED (45)"
- Interface error. A specified outgoing interface could not be used. Set which
- interface to use for outgoing connections' source IP address with
- CURLOPT_INTERFACE. (This error code was formerly known as
- CURLE_HTTP_PORT_FAILED.)
- .IP "CURLE_TOO_MANY_REDIRECTS (47)"
- Too many redirects. When following redirects, libcurl hit the maximum amount.
- Set your limit with CURLOPT_MAXREDIRS.
- .IP "CURLE_UNKNOWN_TELNET_OPTION (48)"
- An option set with CURLOPT_TELNETOPTIONS was not recognized/known. Refer to
- the appropriate documentation.
- .IP "CURLE_TELNET_OPTION_SYNTAX (49)"
- A telnet option string was Illegally formatted.
- .IP "CURLE_PEER_FAILED_VERIFICATION (51)"
- The remote server's SSL certificate or SSH md5 fingerprint was deemed not OK.
- .IP "CURLE_GOT_NOTHING (52)"
- Nothing was returned from the server, and under the circumstances, getting
- nothing is considered an error.
- .IP "CURLE_SSL_ENGINE_NOTFOUND (53)"
- The specified crypto engine wasn't found.
- .IP "CURLE_SSL_ENGINE_SETFAILED (54)"
- Failed setting the selected SSL crypto engine as default!
- .IP "CURLE_SEND_ERROR (55)"
- Failed sending network data.
- .IP "CURLE_RECV_ERROR (56)"
- Failure with receiving network data.
- .IP "CURLE_SSL_CERTPROBLEM (58)"
- problem with the local client certificate.
- .IP "CURLE_SSL_CIPHER (59)"
- Couldn't use specified cipher.
- .IP "CURLE_SSL_CACERT (60)"
- Peer certificate cannot be authenticated with known CA certificates.
- .IP "CURLE_BAD_CONTENT_ENCODING (61)"
- Unrecognized transfer encoding.
- .IP "CURLE_LDAP_INVALID_URL (62)"
- Invalid LDAP URL.
- .IP "CURLE_FILESIZE_EXCEEDED (63)"
- Maximum file size exceeded.
- .IP "CURLE_USE_SSL_FAILED (64)"
- Requested FTP SSL level failed.
- .IP "CURLE_SEND_FAIL_REWIND (65)"
- When doing a send operation curl had to rewind the data to retransmit, but the
- rewinding operation failed.
- .IP "CURLE_SSL_ENGINE_INITFAILED (66)"
- Initiating the SSL Engine failed.
- .IP "CURLE_LOGIN_DENIED (67)"
- The remote server denied curl to login (Added in 7.13.1)
- .IP "CURLE_TFTP_NOTFOUND (68)"
- File not found on TFTP server.
- .IP "CURLE_TFTP_PERM (69)"
- Permission problem on TFTP server.
- .IP "CURLE_REMOTE_DISK_FULL (70)"
- Out of disk space on the server.
- .IP "CURLE_TFTP_ILLEGAL (71)"
- Illegal TFTP operation.
- .IP "CURLE_TFTP_UNKNOWNID (72)"
- Unknown TFTP transfer ID.
- .IP "CURLE_REMOTE_FILE_EXISTS (73)"
- File already exists and will not be overwritten.
- .IP "CURLE_TFTP_NOSUCHUSER (74)"
- This error should never be returned by a properly functioning TFTP server.
- .IP "CURLE_CONV_FAILED (75)"
- Character conversion failed.
- .IP "CURLE_CONV_REQD (76)"
- Caller must register conversion callbacks.
- .IP "CURLE_SSL_CACERT_BADFILE (77)"
- Problem with reading the SSL CA cert (path? access rights?)
- .IP "CURLE_REMOTE_FILE_NOT_FOUND (78)"
- The resource referenced in the URL does not exist.
- .IP "CURLE_SSH (79)"
- An unspecified error occurred during the SSH session.
- .IP "CURLE_SSL_SHUTDOWN_FAILED (80)"
- Failed to shut down the SSL connection.
- .IP "CURLE_AGAIN (81)"
- Socket is not ready for send/recv wait till it's ready and try again. This
- return code is only returned from fIcurl_easy_recv(3)fP and
- fIcurl_easy_send(3)fP (Added in 7.18.2)
- .IP "CURLE_SSL_CRL_BADFILE (82)"
- Failed to load CRL file (Added in 7.19.0)
- .IP "CURLE_SSL_ISSUER_ERROR (83)"
- Issuer check failed (Added in 7.19.0)
- .IP "CURLE_OBSOLETE*"
- These error codes will never be returned. They were used in an old libcurl
- version and are currently unused.
- .SH "CURLMcode"
- This is the generic return code used by functions in the libcurl multi
- interface. Also consider fIcurl_multi_strerror(3)fP.
- .IP "CURLM_CALL_MULTI_PERFORM (-1)"
- This is not really an error. It means you should call
- fIcurl_multi_perform(3)fP again without doing select() or similar in between.
- .IP "CURLM_OK (0)"
- Things are fine.
- .IP "CURLM_BAD_HANDLE (1)"
- The passed-in handle is not a valid CURLM handle.
- .IP "CURLM_BAD_EASY_HANDLE (2)"
- An easy handle was not good/valid. It could mean that it isn't an easy handle
- at all, or possibly that the handle already is in used by this or another
- multi handle.
- .IP "CURLM_OUT_OF_MEMORY (3)"
- You are doomed.
- .IP "CURLM_INTERNAL_ERROR (4)"
- This can only be returned if libcurl bugs. Please report it to us!
- .IP "CURLM_BAD_SOCKET (5)"
- The passed-in socket is not a valid one that libcurl already knows about.
- (Added in 7.15.4)
- .IP "CURLM_UNKNOWN_OPTION (6)"
- curl_multi_setopt() with unsupported option
- (Added in 7.15.4)
- .SH "CURLSHcode"
- The "share" interface will return a CURLSHcode to indicate when an error has
- occurred. Also consider fIcurl_share_strerror(3)fP.
- .IP "CURLSHE_OK (0)"
- All fine. Proceed as usual.
- .IP "CURLSHE_BAD_OPTION (1)"
- An invalid option was passed to the function.
- .IP "CURLSHE_IN_USE (2)"
- The share object is currently in use.
- .IP "CURLSHE_INVALID (3)"
- An invalid share object was passed to the function.
- .IP "CURLSHE_NOMEM (4)"
- Not enough memory was available.
- (Added in 7.12.0)