On 2018/04/04 19:09, Björn Felten wrote:

>  TK> curl.exe -4
>
>    Is this a new feature? What does it do?

I'm sure you can guess what it does. ;)

> D:\Documents and Settings\bfelten>curl.exe -4
> curl: option -4 is unknown
> curl: try 'curl --help' for more information

[C:\]curl.exe --version
curl 7.59.0 (x86_64-unknown-cygwin) libcurl/7.59.0 OpenSSL/1.0.2n
zlib/1.2.11 libidn2/2.0.4 libpsl/0.18.0 (+libidn2/2.0.2) libssh2/1.7.0
nghttp2/1.31.0
Release-Date: 2018-03-14
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps
pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: AsynchDNS Debug IDN IPv6 Largefile GSS-API Kerberos SPNEGO
NTLM NTLM_WB SSL libz TLS-SRP HTTP2 UnixSockets HTTPS-proxy PSL Metalink

[C:\]curl.exe --help
Usage: curl [options...] 
     --abstract-unix-socket  Connect via abstract Unix domain socket
     --anyauth       Pick any authentication method
 -a, --append        Append to target file when uploading
     --basic         Use HTTP Basic Authentication
     --cacert  CA certificate to verify peer against
     --capath   CA directory to verify peer against
 -E, --cert  Client certificate file and password
     --cert-status   Verify the status of the server certificate
     --cert-type  Certificate file type (DER/PEM/ENG)
     --ciphers  SSL ciphers to use
     --compressed    Request compressed response
     --compressed-ssh Enable SSH compression
 -K, --config  Read config from a file
     --connect-timeout  Maximum time allowed for connection
     --connect-to  Connect to host
 -C, --continue-at  Resumed transfer offset
 -b, --cookie  Send cookies from string/file
 -c, --cookie-jar  Write cookies to  after operation
     --create-dirs   Create necessary local directory hierarchy
     --crlf          Convert LF to CRLF in upload
     --crlfile  Get a CRL list in PEM format from the given file
 -d, --data    HTTP POST data
     --data-ascii  HTTP POST ASCII data
     --data-binary  HTTP POST binary data
     --data-raw  HTTP POST data, '@' allowed
     --data-urlencode  HTTP POST data url encoded
     --delegation  GSS-API delegation permission
     --digest        Use HTTP Digest Authentication
 -q, --disable       Disable .curlrc
     --disable-eprt  Inhibit using EPRT or LPRT
     --disable-epsv  Inhibit using EPSV
     --dns-interface  Interface to use for DNS requests
     --dns-ipv4-addr  IPv4 address to use for DNS requests
     --dns-ipv6-addr  IPv6 address to use for DNS requests
     --dns-servers  DNS server addrs to use
 -D, --dump-header  Write the received headers to 
     --egd-file  EGD socket path for random data
     --engine  Crypto engine to use
     --expect100-timeout  How long to wait for 100-continue
 -f, --fail          Fail silently (no output at all) on HTTP errors
     --fail-early    Fail on first transfer error, do not continue
     --false-start   Enable TLS False Start
 -F, --form  Specify multipart MIME data
     --form-string  Specify multipart MIME data
     --ftp-account  Account data string
     --ftp-alternative-to-user  String to replace USER [name]
     --ftp-create-dirs Create the remote dirs if not present
     --ftp-method  Control CWD usage
     --ftp-pasv      Use PASV/EPSV instead of PORT
 -P, --ftp-port  Use PORT instead of PASV
     --ftp-pret      Send PRET before PASV
     --ftp-skip-pasv-ip Skip the IP address for PASV
     --ftp-ssl-ccc   Send CCC after authenticating
     --ftp-ssl-ccc-mode  Set CCC mode
     --ftp-ssl-control Require SSL/TLS for FTP login, clear for transfer
 -G, --get           Put the post data in the URL and use GET
 -g, --globoff       Disable URL sequences and ranges using {} and []
     --happy-eyeballs-timeout-ms How long to wait in milliseconds for
IPv6 before trying IPv4
 -I, --head          Show document info only
 -H, --header  Pass custom header(s) to server
 -h, --help          This help text
     --hostpubmd5  Acceptable MD5 hash of the host public key
 -0, --http1.0       Use HTTP 1.0
     --http1.1       Use HTTP 1.1
     --http2         Use HTTP 2
     --http2-prior-knowledge Use HTTP 2 without HTTP/1.1 Upgrade
     --ignore-content-length Ignore the size of the remote resource
 -i, --include       Include protocol response headers in the output
 -k, --insecure      Allow insecure server connections when using SSL
     --interface  Use network INTERFACE (or address)
 -4, --ipv4          Resolve names to IPv4 addresses
 -6, --ipv6          Resolve names to IPv6 addresses
 -j, --junk-session-cookies Ignore session cookies read from file
     --keepalive-time  Interval time for keepalive probes
     --key      Private key file name
     --key-type  Private key file type (DER/PEM/ENG)
     --krb    Enable Kerberos with security 
     --libcurl  Dump libcurl equivalent code of this command line
     --limit-rate  Limit transfer speed to RATE
 -l, --list-only     List only mode
     --local-port  Force use of RANGE for local port numbers
 -L, --location      Follow redirects
     --location-trusted Like --location, and send auth to other hosts
     --login-options  Server login options
     --mail-auth  Originator address of the original email
     --mail-from  Mail from this address
     --mail-rcpt  Mail to this address
 -M, --manual        Display the full manual
     --max-filesize  Maximum file size to download
     --max-redirs  Maximum number of redirects allowed
 -m, --max-time  Maximum time allowed for the transfer
     --metalink      Process given URLs as metalink XML file
     --negotiate     Use HTTP Negotiate (SPNEGO) authentication
 -n, --netrc         Must read .netrc for user name and password
     --netrc-file  Specify FILE for netrc
     --netrc-optional Use either .netrc or URL
 -:, --next          Make next URL use its separate set of options
     --no-alpn       Disable the ALPN TLS extension
 -N, --no-buffer     Disable buffering of the output stream
     --no-keepalive  Disable TCP keepalive on the connection
     --no-npn        Disable the NPN TLS extension
     --no-sessionid  Disable SSL session-ID reusing
     --noproxy  List of hosts which do not use proxy
     --ntlm          Use HTTP NTLM authentication
     --ntlm-wb       Use HTTP NTLM authentication with winbind
     --oauth2-bearer  OAuth 2 Bearer Token
 -o, --output  Write to file instead of stdout
     --pass  Pass phrase for the private key
     --path-as-is    Do not squash .. sequences in URL path
     --pinnedpubkey  FILE/HASHES Public key to verify peer against
     --post301       Do not switch to GET after following a 301
     --post302       Do not switch to GET after following a 302
     --post303       Do not switch to GET after following a 303
     --preproxy [protocol://]host[:port] Use this proxy first
 -#, --progress-bar  Display transfer progress as a bar
     --proto  Enable/disable PROTOCOLS
     --proto-default  Use PROTOCOL for any URL missing a scheme
     --proto-redir  Enable/disable PROTOCOLS on redirect
 -x, --proxy [protocol://]host[:port] Use this proxy
     --proxy-anyauth Pick any proxy authentication method
     --proxy-basic   Use Basic authentication on the proxy
     --proxy-cacert  CA certificate to verify peer against for proxy
     --proxy-capath  CA directory to verify peer against for proxy
     --proxy-cert  Set client certificate for proxy
     --proxy-cert-type  Client certificate type for HTTS proxy
     --proxy-ciphers  SSL ciphers to use for proxy
     --proxy-crlfile  Set a CRL list for proxy
     --proxy-digest  Use Digest authentication on the proxy
     --proxy-header  Pass custom header(s) to proxy
     --proxy-insecure Do HTTPS proxy connections without verifying the proxy
     --proxy-key  Private key for HTTPS proxy
     --proxy-key-type  Private key file type for proxy
     --proxy-negotiate Use HTTP Negotiate (SPNEGO) authentication on the
proxy
     --proxy-ntlm    Use NTLM authentication on the proxy
     --proxy-pass  Pass phrase for the private key for HTTPS proxy
     --proxy-pinnedpubkey  FILE/HASHES public key to verify
proxy with
     --proxy-service-name  SPNEGO proxy service name
     --proxy-ssl-allow-beast Allow security flaw for interop for HTTPS proxy
     --proxy-tlsauthtype  TLS authentication type for HTTPS proxy
     --proxy-tlspassword  TLS password for HTTPS proxy
     --proxy-tlsuser  TLS username for HTTPS proxy
     --proxy-tlsv1   Use TLSv1 for HTTPS proxy
 -U, --proxy-user  Proxy user and password
     --proxy1.0  Use HTTP/1.0 proxy on given port
 -p, --proxytunnel   Operate through a HTTP proxy tunnel (using CONNECT)
     --pubkey   SSH Public key file name
 -Q, --quote         Send command(s) to server before transfer
     --random-file  File for reading random data from
 -r, --range  Retrieve only the bytes within RANGE
     --raw           Do HTTP "raw"; no transfer decoding
 -e, --referer  Referrer URL
 -J, --remote-header-name Use the header-provided filename
 -O, --remote-name   Write output to a file named as the remote file
     --remote-name-all Use the remote file name for all URLs
 -R, --remote-time   Set the remote file's time on the local output
 -X, --request  Specify request command to use
     --request-target Specify the target for this request
     --resolve  Resolve the host+port to this address
     --retry    Retry request if transient problems occur
     --retry-connrefused Retry on connection refused (use with --retry)
     --retry-delay  Wait time between retries
     --retry-max-time  Retry only within this period
     --sasl-ir       Enable initial response in SASL authentication
     --service-name  SPNEGO service name
 -S, --show-error    Show error even when -s is used
 -s, --silent        Silent mode
     --socks4  SOCKS4 proxy on given host + port
     --socks4a  SOCKS4a proxy on given host + port
     --socks5  SOCKS5 proxy on given host + port
     --socks5-basic  Enable username/password auth for SOCKS5 proxies
     --socks5-gssapi Enable GSS-API auth for SOCKS5 proxies
     --socks5-gssapi-nec Compatibility with NEC SOCKS5 server
     --socks5-gssapi-service  SOCKS5 proxy service name for GSS-API
     --socks5-hostname  SOCKS5 proxy, pass host name to proxy
 -Y, --speed-limit  Stop transfers slower than this
 -y, --speed-time  Trigger 'speed-limit' abort after this time
     --ssl           Try SSL/TLS
     --ssl-allow-beast Allow security flaw to improve interop
     --ssl-no-revoke Disable cert revocation checks (WinSSL)
     --ssl-reqd      Require SSL/TLS
 -2, --sslv2         Use SSLv2
 -3, --sslv3         Use SSLv3
     --stderr        Where to redirect stderr
     --suppress-connect-headers Suppress proxy CONNECT response headers
     --tcp-fastopen  Use TCP Fast Open
     --tcp-nodelay   Use the TCP_NODELAY option
 -t, --telnet-option  Set telnet option
     --tftp-blksize  Set TFTP BLKSIZE option
     --tftp-no-options Do not send any TFTP options
 -z, --time-cond  Transfer based on a time condition
     --tls-max  Use TLSv1.0 or greater
     --tlsauthtype  TLS authentication type
     --tlspassword   TLS password
     --tlsuser  TLS user name
 -1, --tlsv1         Use TLSv1.0 or greater
     --tlsv1.0       Use TLSv1.0
     --tlsv1.1       Use TLSv1.1
     --tlsv1.2       Use TLSv1.2
     --tlsv1.3       Use TLSv1.3
     --tr-encoding   Request compressed transfer encoding
     --trace   Write a debug trace to FILE
     --trace-ascii  Like --trace, but without hex output
     --trace-time    Add time stamps to trace/verbose output
     --unix-socket  Connect through this Unix domain socket
 -T, --upload-file  Transfer local FILE to destination
     --url      URL to work with
 -B, --use-ascii     Use ASCII/text transfer
 -u, --user  Server user and password
 -A, --user-agent  Send User-Agent  to server
 -v, --verbose       Make the operation more talkative
 -V, --version       Show version number and quit
 -w, --write-out  Use output FORMAT after completion
     --xattr         Store metadata in extended file attributes

'Tommi

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