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curl/docs/cmdline-opts/keepalive-time.md

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docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751
2024-01-21 06:18:43 +08:00
---
copyright: update all copyright lines and remove year ranges - they are mostly pointless in all major jurisdictions - many big corporations and projects already don't use them - saves us from pointless churn - git keeps history for us - the year range is kept in COPYING checksrc is updated to allow non-year using copyright statements Closes #10205
2023-01-02 20:51:48 +08:00
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
docs/cmdline-opts: add copyright and license identifier to each file gen.pl now insists on C: and SPDX-License-Identifier: fields to be present in all files. Closes #9002
2022-06-14 06:12:03 +08:00
SPDX-License-Identifier: curl
cmdline-docs: more options converted over
2016-11-16 06:44:58 +08:00
Long: keepalive-time
Arg: <seconds>
Help: Interval time for keepalive probes
Added: 7.18.0
docs: add categories to all cmdline opts Adapted gen.pl with 'listcats' This commit is a part of "--help me if you can" Closes #5680
2020-07-13 20:15:04 +08:00
Category: connection
cmdline/docs: add a required 'multi' keyword for each option The keyword specifies how option works when specified multiple times: - single: the last provided value replaces the earlier ones - append: it supports being provided multiple times - boolean: on/off values - mutex: flag-like option that disable anoter flag The 'gen.pl' script then outputs the proper and unified language for each option's multi-use behavior in the generated man page. The multi: header is requires in each .d file and will cause build error if missing or set to an unknown value. Closes #9759
2022-10-18 16:39:43 +08:00
Multi: single
docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751
2024-01-21 06:18:43 +08:00
See-also:
- no-keepalive
tcpkeepalive: add CURLOPT_TCP_KEEPCNT and --keepalive-cnt Closes #13885
2024-06-05 11:30:16 +08:00
- keepalive-cnt
docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751
2024-01-21 06:18:43 +08:00
- max-time
Example:
- --keepalive-time 20 $URL
cmdline-docs: more options converted over
2016-11-16 06:44:58 +08:00
---
docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751
2024-01-21 06:18:43 +08:00
# `--keepalive-time`
cmdline-opts: language cleanups Use imperative mood consistently for the first sentence describing an option. "Set this" instead "tell curl to set" or "this sets..." Plus some extra cleanups and rephrasing. Closes #13106
2024-03-12 17:34:58 +08:00
Set the time a connection needs to remain idle before sending keepalive probes
and the time between individual keepalive probes. It is currently effective on
operating systems offering the `TCP_KEEPIDLE` and `TCP_KEEPINTVL` socket
tcpkeepalive: support setting TCP keep-alive parameters on Solaris <11.4 Solaris didn't support TCP_KEEPIDLE and TCP_KEEPINTVL until 11.4, before that it use TCP_KEEPALIVE_THRESHOLD and TCP_KEEPALIVE_ABORT_THRESHOLD as the substitute. Therefore, for Solaris <11.4 we need to use this substitute for setting TCP keep-alive parameters. Ref: https://docs.oracle.com/cd/E86824_01/html/E54777/tcp-7p.html https://docs.oracle.com/cd/E88353_01/html/E37851/tcp-4p.html Closes #13864
2024-06-03 15:15:55 +08:00
options (meaning Linux, *BSD/macOS, Windows, Solaris, and recent AIX, HP-UX and more).
Keepalive is used by the TCP stack to detect broken networks on idle connections.
The number of missed keepalive probes before declaring the connection down is OS
tcpkeepalive: add CURLOPT_TCP_KEEPCNT and --keepalive-cnt Closes #13885
2024-06-05 11:30:16 +08:00
dependent and is commonly 8 (*BSD/macOS/AIX), 9 (Linux/AIX) or 5/10 (Windows), and
this number can be changed by specifying the curl option `keepalive-cnt`.
Note that this option has no effect if --no-keepalive is used.
cmdline-docs: more options converted over
2016-11-16 06:44:58 +08:00
cmdline/docs: add a required 'multi' keyword for each option The keyword specifies how option works when specified multiple times: - single: the last provided value replaces the earlier ones - append: it supports being provided multiple times - boolean: on/off values - mutex: flag-like option that disable anoter flag The 'gen.pl' script then outputs the proper and unified language for each option's multi-use behavior in the generated man page. The multi: header is requires in each .d file and will cause build error if missing or set to an unknown value. Closes #9759
2022-10-18 16:39:43 +08:00
If unspecified, the option defaults to 60 seconds.
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