204 lines
8.9 KiB
Groff
204 lines
8.9 KiB
Groff
.\" You can view this file with:
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.\" nroff -man [file]
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.\" $Id$
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.\"
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.TH libcurl-errors 3 "18 Oct 2003" "libcurl 7.10.8" "libcurl errors"
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.SH NAME
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libcurl-errors \- error codes in libcurl
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.SH DESCRIPTION
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This man page includes most, if not all, available error codes in libcurl.
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Why they occur and possibly what you can do to fix the problem.
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.SH "CURLcode"
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Almost all "easy" interface functions return a CURLcode error code. No matter
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what, using \fICURLOPT_ERRORBUFFER\fP is a good idea as it will give you a
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human readable error string that may offer more details about the error cause
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than just the error code does.
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CURLcode is one of the following:
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.IP "CURLE_OK (0)"
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All fine. Proceed as usual.
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.IP "CURLE_UNSUPPORTED_PROTOCOL (1)"
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The URL you passed to libcurl used a protocol that this libcurl does not
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support. The support might be a compile-time option that you didn't use, it
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can be a misspelled protocol string or just a protocol libcurl has no code
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for.
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.IP "CURLE_FAILED_INIT (2)"
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Very early initialization code failed. This is likely to be an internal error
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or problem.
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.IP "CURLE_URL_MALFORMAT (3)"
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The URL was not properly formatted.
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.IP "CURLE_URL_MALFORMAT_USER (4)"
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URL user malformatted. The user-part of the URL syntax was not correct.
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.IP "CURLE_COULDNT_RESOLVE_PROXY (5)"
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Couldn't resolve proxy. The given proxy host could not be resolved.
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.IP "CURLE_COULDNT_RESOLVE_HOST (6)"
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Couldn't resolve host. The given remote host was not resolved.
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.IP "CURLE_COULDNT_CONNECT (7)"
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Failed to connect() to host or proxy.
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.IP "CURLE_FTP_WEIRD_SERVER_REPLY (8)"
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After connecting to a FTP server, libcurl expects to get a certain reply back.
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This error code implies that it god a strange or bad reply. The given remote
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server is probably not an OK FTP server.
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.IP "CURLE_FTP_ACCESS_DENIED (9)"
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We were denied access when trying to login to an FTP server or when trying to
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change working directory to the one given in the URL.
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.IP "CURLE_FTP_USER_PASSWORD_INCORRECT (10)"
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The username and/or the password were incorrect when trying to login to an FTP
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server.
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.IP "CURLE_FTP_WEIRD_PASS_REPLY (11)"
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After having sent the FTP password to the server, libcurl expects a proper
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reply. This error code indicates that an unexpected code was returned.
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.IP "CURLE_FTP_WEIRD_USER_REPLY (12)"
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After having sent user name to the FTP server, libcurl expects a proper
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reply. This error code indicates that an unexpected code was returned.
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.IP "CURLE_FTP_WEIRD_PASV_REPLY (13)"
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libcurl failed to get a sensible result back from the server as a response to
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either a PASV or a EPSV command. The server is flawed.
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.IP "CURLE_FTP_WEIRD_227_FORMAT (14)"
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FTP servers return a 227-line as a response to a PASV command. If libcurl
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fails to parse that line, this return code is passed back.
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.IP "CURLE_FTP_CANT_GET_HOST (15)"
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An internal failure to lookup the host used for the new connection.
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.IP "CURLE_FTP_CANT_RECONNECT (16)"
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A bad return code on either PASV or EPSV was sent by the FTP server,
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preventing libcurl from being able to continue.
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.IP "CURLE_FTP_COULDNT_SET_BINARY (17)"
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Received an error when trying to set the transfer mode to binary.
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.IP "CURLE_PARTIAL_FILE (18)"
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A file transfer was shorter or larger than expected. This happens when the
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server first reports an expected transfer size, and then delivers data that
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doesn't match the previously given size.
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.IP "CURLE_FTP_COULDNT_RETR_FILE (19)"
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This was either a weird reply to a 'RETR' command or a zero byte transfer
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complete.
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.IP "CURLE_FTP_WRITE_ERROR (20)"
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After a completed file transfer, the FTP server did not respond a proper
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\"transfer successful\" code.
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.IP "CURLE_FTP_QUOTE_ERROR (21)"
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When sending custom "QUOTE" commands to the remote server, one of the commands
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returned an error code that was 400 or higher.
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.IP "CURLE_HTTP_RETURNED_ERROR (22)"
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This is returned if CURLOPT_FAILONERROR is set TRUE and the HTTP server
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returns an error code that is >= 400.
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.IP "CURLE_WRITE_ERROR (23)"
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An error occurred when writing received data to a local file, or an error was
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returned to libcurl from a write callback.
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.IP "CURLE_MALFORMAT_USER (24)"
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Malformat user. User name badly specified. *Not currently used*
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.IP "CURLE_FTP_COULDNT_STOR_FILE (25)"
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FTP couldn't STOR file. The server denied the STOR operation. The error buffer
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usually contains the server's explanation to this.
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.IP "CURLE_READ_ERROR (26)"
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There was a problem reading a local file or an error returned by the read
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callback.
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.IP "CURLE_OUT_OF_MEMORY (27)"
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Out of memory. A memory allocation request failed. This is serious badness and
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things are severly screwed up if this ever occur.
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.IP "CURLE_OPERATION_TIMEOUTED (28)"
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Operation timeout. The specified time-out period was reached according to the
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conditions.
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.IP "CURLE_FTP_COULDNT_SET_ASCII (29)"
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libcurl failed to set ASCII transfer type (TYPE A).
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.IP "CURLE_FTP_PORT_FAILED (30)"
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The FTP PORT command returned error. This mostly happen when you haven't
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specified a good enough address for libcurl to use. See \fICURLOPT_FTPPORT\fP.
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.IP "CURLE_FTP_COULDNT_USE_REST (31)"
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The FTP REST command returned error. This should never happen if the server is
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sane.
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.IP "CURLE_FTP_COULDNT_GET_SIZE (32)"
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The FTP SIZE command returned errror. SIZE is not a kosher FTP command, it is
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an extension and not all servers support it. This is not a surprising error.
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.IP "CURLE_HTTP_RANGE_ERROR (33)"
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The HTTP server does not support or accept range requests.
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.IP "CURLE_HTTP_POST_ERROR (34)"
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This is an odd error that mainly occurs due to internal confusion.
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.IP "CURLE_SSL_CONNECT_ERROR (35)"
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A problem occured somewhere in the SSL/TLS handshake. You really want the
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error buffer and read the message there as it pinpoints the problem slightly
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more. Could be certificates (file formats, paths, permissions), passwords, and
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others.
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.IP "CURLE_FTP_BAD_DOWNLOAD_RESUME (36)"
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Attempting FTP resume beyond file size.
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.IP "CURLE_FILE_COULDNT_READ_FILE (37)"
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A file given with FILE:// couldn't be opened. Most likely because the file
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path doesn't identify an existing file. Did you check file permissions?
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.IP "CURLE_LDAP_CANNOT_BIND (38)"
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LDAP cannot bind. LDAP bind operation failed.
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.IP "CURLE_LDAP_SEARCH_FAILED (39)"
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LDAP search failed.
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.IP "CURLE_LIBRARY_NOT_FOUND (40)"
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Library not found. The LDAP library was not found.
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.IP "CURLE_FUNCTION_NOT_FOUND (41)"
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Function not found. A required LDAP function was not found.
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.IP "CURLE_ABORTED_BY_CALLBACK (42)"
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Aborted by callback. A callback returned "abort" to libcurl.
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.IP "CURLE_BAD_FUNCTION_ARGUMENT (43)"
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Internal error. A function was called with a bad parameter.
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.IP "CURLE_BAD_CALLING_ORDER (44)"
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Internal error. A function was called in a bad order.
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.IP "CURLE_HTTP_PORT_FAILED (45)"
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Interface error. A specified outgoing interface could not be used. Set which
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interface to use for outgoing connections' source IP address with
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CURLOPT_INTERFACE.
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.IP "CURLE_BAD_PASSWORD_ENTERED (46)"
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Bad password entered. An error was signaled when the password was
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entered. This can also be the result of a "bad password" returned from a
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specified password callback.
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.IP "CURLE_TOO_MANY_REDIRECTS (47)"
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Too many redirects. When following redirects, libcurl hit the maximum amount.
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Set your limit with CURLOPT_MAXREDIRS.
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.IP "CURLE_UNKNOWN_TELNET_OPTION (48)"
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An option set with CURLOPT_TELNETOPTIONS was not recognized/known. Refer to
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the appropriate documentation.
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.IP "CURLE_TELNET_OPTION_SYNTAX (49)"
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A telnet option string was Illegally formatted.
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.IP "CURLE_OBSOLETE (50)"
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This is not an error. This used to be another error code in an old libcurl
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version and is currently unused.
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.IP "CURLE_SSL_PEER_CERTIFICATE (51)"
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The remote server's SSL certificate was deemed not OK.
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.IP "CURLE_GOT_NOTHING (52)"
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Nothing was returned from the server, and under the circumstances, getting
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nothing is considered an error.
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.IP "CURLE_SSL_ENGINE_NOTFOUND (53)"
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The specified crypto engine wasn't found.
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.IP "CURLE_SSL_ENGINE_SETFAILED (54)"
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Failed setting the selected SSL crypto engine as default!
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.IP "CURLE_SEND_ERROR (55)"
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Failed sending network data.
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.IP "CURLE_RECV_ERROR (56)"
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Failure with receiving network data.
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.IP "CURLE_RECV_ERROR (57)"
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Failure with receiving network data.
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.IP "CURLE_SSL_CERTPROBLEM (58)"
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problem with the local certificate
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.IP "CURLE_SSL_CIPHER (59)"
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couldn't use specified cipher
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.IP "CURLE_SSL_CACERT (60)"
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problem with the CA cert (path? access rights?)
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.IP "CURLE_BAD_CONTENT_ENCODING (61)"
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Unrecognized transfer encoding
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.IP "CURLE_LDAP_INVALID_URL (62)"
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Invalid LDAP URL
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.IP "CURLE_FILESIZE_EXCEEDED (63)"
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Maximum file size exceeded
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.SH "CURLMcode"
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This is the generic return code used by functions in the libcurl multi
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interface.
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This is left to be documented.
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.SH "CURLSHcode"
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The "share" interface will return a CURLSHcode to indicate when an
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error has occurred.
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CURLSHcode is one of the following:
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.IP "CURLSHE_OK (0)"
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All fine. Proceed as usual.
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.IP "CURLSHE_BAD_OPTION (1)"
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An invalid option was passed to the function.
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.IP "CURLSHE_IN_USE (2)"
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The share object is currently in use.
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.IP "CURLSHE_INVALID (3)"
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An invalid share object was passed to the function.
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