curl.1

(HTTP) Forces curl to issue its requests using HTTP 1.0 instead of using its
internally preferred: HTTP 1.1.
.IP "-1/--tlsv1"
(HTTPS)
Forces curl to use TSL version 1 when negotiating with a remote TLS server.
.IP "-2/--sslv2"
(HTTPS)
Forces curl to use SSL version 2 when negotiating with a remote SSL server.
.IP "-3/--sslv3"
(HTTPS)
Forces curl to use SSL version 3 when negotiating with a remote SSL server.
.IP "-4/--ipv4"
If libcurl is capable of resolving an address to multiple IP versions (which
it is if it is ipv6-capable), this option tells libcurl to resolve names to
IPv4 addresses only. (Added in 7.10.8)
.IP "-6/--ipv6"
If libcurl is capable of resolving an address to multiple IP versions (which
it is if it is ipv6-capable), this option tells libcurl to resolve names to
IPv6 addresses only. (Added in 7.10.8)
.IP "-#/--progress-bar"
Make curl display progress information as a progress bar instead of the
default statistics.

If this option is used twice, the second will again disable the progress bar.
.SH FILES
.I ~/.curlrc
.RS
Default config file.

.SH ENVIRONMENT
.IP "http_proxy [protocol://]<host>[:port]"
Sets proxy server to use for HTTP.
.IP "HTTPS_PROXY [protocol://]<host>[:port]"
Sets proxy server to use for HTTPS.
.IP "FTP_PROXY [protocol://]<host>[:port]"
Sets proxy server to use for FTP.
.IP "GOPHER_PROXY [protocol://]<host>[:port]"
Sets proxy server to use for GOPHER.
.IP "ALL_PROXY [protocol://]<host>[:port]"
Sets proxy server to use if no protocol-specific proxy is set.
.IP "NO_PROXY <comma-separated list of hosts>"
list of host names that shouldn't go through any proxy. If set to a asterisk
'*' only, it matches all hosts.
.SH EXIT CODES
There exists a bunch of different error codes and their corresponding error
messages that may appear during bad conditions. At the time of this writing,
the exit codes are:
.IP 1
Unsupported protocol. This build of curl has no support for this protocol.
.IP 2
Failed to initialize.
.IP 3
URL malformat. The syntax was not correct.
.IP 4
URL user malformatted. The user-part of the URL syntax was not correct.
.IP 5
Couldn't resolve proxy. The given proxy host could not be resolved.
.IP 6
Couldn't resolve host. The given remote host was not resolved.
.IP 7
Failed to connect to host.
.IP 8
FTP weird server reply. The server sent data curl couldn't parse.
.IP 9
FTP access denied. The server denied login.
.IP 10
FTP user/password incorrect. Either one or both were not accepted by the
server.
.IP 11
FTP weird PASS reply. Curl couldn't parse the reply sent to the PASS request.
.IP 12
FTP weird USER reply. Curl couldn't parse the reply sent to the USER request.
.IP 13
FTP weird PASV reply, Curl couldn't parse the reply sent to the PASV request.
.IP 14
FTP weird 227 format. Curl couldn't parse the 227-line the server sent.
.IP 15
FTP can't get host. Couldn't resolve the host IP we got in the 227-line.
.IP 16
FTP can't reconnect. Couldn't connect to the host we got in the 227-line.
.IP 17
FTP couldn't set binary. Couldn't change transfer method to binary.
.IP 18
Partial file. Only a part of the file was transfered.
.IP 19
FTP couldn't download/access the given file, the RETR (or similar) command
failed.
.IP 20
FTP write error. The transfer was reported bad by the server.
.IP 21
FTP quote error. A quote command returned error from the server.
.IP 22
HTTP page not retrieved. The requested url was not found or returned another
error with the HTTP error code being 400 or above. This return code only
appears if \fI-f/--fail\fP is used.
.IP 23
Write error. Curl couldn't write data to a local filesystem or similar.
.IP 24
Malformed user. User name badly specified.
.IP 25
FTP couldn't STOR file. The server denied the STOR operation, used for FTP
uploading.
.IP 26
Read error. Various reading problems.
.IP 27
Out of memory. A memory allocation request failed.
.IP 28
Operation timeout. The specified time-out period was reached according to the
conditions.
.IP 29
FTP couldn't set ASCII. The server returned an unknown reply.
.IP 30
FTP PORT failed. The PORT command failed. Not all FTP servers support the PORT
command, try doing a transfer using PASV instead!
.IP 31
FTP couldn't use REST. The REST command failed. This command is used for
resumed FTP transfers.
.IP 32
FTP couldn't use SIZE. The SIZE command failed. The command is an extension
to the original FTP spec RFC 959.
.IP 33
HTTP range error. The range "command" didn't work.
.IP 34
HTTP post error. Internal post-request generation error.
.IP 35
SSL connect error. The SSL handshaking failed.
.IP 36
FTP bad download resume. Couldn't continue an earlier aborted download.
.IP 37
FILE couldn't read file. Failed to open the file. Permissions?
.IP 38
LDAP cannot bind. LDAP bind operation failed.
.IP 39
LDAP search failed.
.IP 40
Library not found. The LDAP library was not found.
.IP 41
Function not found. A required LDAP function was not found.
.IP 42
Aborted by callback. An application told curl to abort the operation.
.IP 43
Internal error. A function was called with a bad parameter.
.IP 44
Internal error. A function was called in a bad order.
.IP 45
Interface error. A specified outgoing interface could not be used.
.IP 46
Bad password entered. An error was signaled when the password was entered.
.IP 47
Too many redirects. When following redirects, curl hit the maximum amount.
.IP 48
Unknown TELNET option specified.
.IP 49
Malformed telnet option.
.IP 51
The remote peer's SSL certificate wasn't ok
.IP 52
The server didn't reply anything, which here is considered an error.
.IP 53
SSL crypto engine not found
.IP 54
Cannot set SSL crypto engine as default
.IP 55
Failed sending network data
.IP 56
Failure in receiving network data
.IP 57
Share is in use (internal error)
.IP 58
Problem with the local certificate
.IP 59
Couldn't use specified SSL cipher
.IP 60
Problem with the CA cert (path? permission?)
.IP 61
Unrecognized transfer encoding
.IP 62
Invalid LDAP URL
.IP 63
Maximum file size exceeded
.IP XX
There will appear more error codes here in future releases. The existing ones
are meant to never change.
.SH AUTHORS / CONTRIBUTORS
Daniel Stenberg is the main author, but the whole list of contributors is
found in the separate THANKS file.
.SH WWW
http://curl.haxx.se
.SH FTP
ftp://ftp.sunet.se/pub/www/utilities/curl/
.SH "SEE ALSO"
.BR ftp (1),
.BR wget (1),
.BR snarf (1)