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This reverts commit eaf8ca41dfa4850437ad270d3897399c9358ced0.
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kernel: inet - fix invalid IPv4-mapped-address examples
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* lukas/doc/extend-secure-distr-warn/OTP-14425:
otp: Extend secure distribution docs warnings
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Warnings have been added to the relevant documentation
about not using un-secure distributed nodes in exposed
environments.
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This patch adds a mechanism by which shell history gets stored
persistently on disk and gets loaded whenever a new shell session
begins.
The log files are added to the user's cache directory, with multiple
files in it, although the location is configurable.
All Erlang instances on a given host will share the same log file.
There are two hook points in group.erl that are used: when instantiating
the buffer, where we fetch from disk, and when adding a line to the
buffer (gets stored).
This allows all shell instances to use the same base set of lines when
loaded, but to keep their history separate after the fact. As lines are
added as you go, a new shell session (with ^G -> s -> c) will have
access to previous sessions' lines.
The implementation makes use of the disk_log library with a rotating log
in order to store data, and allow automated repairs.
By default, the feature is disabled and must be turned on through OTP
environment variable part of the kernel application. The options
include:
| Option | Accepted values | Default | Description |
| ------------------------ | ----------------- |---------- | -------------------- |
| shell_history | enabled, disabled | disabled | turn feature on/off |
| shell_history_path | any string | user cache| where to put files |
| shell_history_file_bytes | 51200..N bytes | 512kb | max data size (>50kb)|
| shell_history_drop | ["q().", ...] | [] | blacklisted lines |
A version header is added to the disk_log configuration, allowing
changes in the storage format to be enacted in the future (i.e. adding
segmentation by node name in the same file, or encoding) without
conflict.
Log rotation is used with multiple log files to ensure proper
enforcement of resizing without too much data loss. Because disk_log
does not allow to just flush bits of content on rewrite (it truncates
any full file), we instead use a wrap log and try to divide the
configured size into up to 10 log files so that every time we rotate a
log, we lose only 10% of the data. This remains true for corrupted files
that cannot fully be repaired.
This many-logs-based approach in turn forces the use of a minimal log
size for the `shell_history_file_bytes` configuration, since it has to
be divided by 10.
The shell history is not loaded for the `user` process which, despite
running the group.erl module, does not actually require history as it
mostly just forwards IO protocol information.
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This option allows to suppress output of info_msgs to error_logger when
recoverable errors are encountered in disk_log by setting the value to
'true'.
Defaults to 'false', the backwards compatible behaviour.
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This reverts commit dc57404252c47520f352834ad9be45ad684f96c9.
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* IPv6 address FFFF::192.168.42.2 is an invalid form as an IPv4-mapped address.
This should be fixed as ::FFFF:192.168.42.2.
The assigned address block is ::ffff:0:0/96.
See RFC6890 Table 20 in the Section 2.2.2 for the further details.
And for this IPv4-mapped address use *only*,
the 32bit LSB of the IPv6 address can be written
with the respective IPv4 address.
See RFC4291 Section 2.2 Form 3 for the further details.
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bind to device is needed to properly support VRF-Lite under
Linux (see [1] for details).
[1]: https://www.kernel.org/doc/Documentation/networking/vrf.txt
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* lukas/kernel/gen_tcp_close_docs:
kernel: Expand gen_tcp:close docs with send text
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This commit attempts to clarify some of the guarantees given by
the TCP standard when issuing close. This is quite a complex
topic so there are probably corner cases still left, but this
at least tells the user that things can go wrong when doing
a close.
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* vans163/patch-1/PR-1319:
Update inet.xml. Note buffer relation to MTU
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The documentation does not indicate this is the buffer responsible for the maximum bytes we can receive from a recv call.
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* maint:
Updated OTP version
Prepare release
Conflicts:
OTP_VERSION
lib/typer/doc/src/notes.xml
lib/typer/vsn.mk
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Extend shell c(...) to find and recompile modules
OTP-14190
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* egil/20/erts/signal-service/OTP-14186:
kernel: Document signal server
erts: Use os module instead of erts_internal for set_signal/2
erts: Do not handle SIGILL
erts: Fix thread suspend in crashdump
erts: Do not enable SIGINT
erts: Use generic signal handler
erts: Add OS signal tests
erts: Handle SIGUSR1 via signal service instead
erts: Handle SIGTERM via signal service instead
kernel: Add gen_event signal server and default handler
erts: Add SIGHUP signal handler
erts: Remove whitespace errors
Conflicts:
erts/emulator/beam/bif.tab
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Reported-by: Loïc Hoguin
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* legoscia/remove-watchdog-vestiges/PR-1255/OTP-14112:
Remove vestiges of watchdog support in heart
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=== OTP-19.2 ===
Changed Applications:
- common_test-1.13
- compiler-7.0.3
- crypto-3.7.2
- dialyzer-3.0.3
- edoc-0.8.1
- erl_docgen-0.6.1
- erl_interface-3.9.2
- erts-8.2
- eunit-2.3.2
- hipe-3.15.3
- inets-6.3.4
- kernel-5.1.1
- mnesia-4.14.2
- observer-2.3
- odbc-2.12
- parsetools-2.1.4
- public_key-1.3
- runtime_tools-1.11
- sasl-3.0.2
- ssh-4.4
- ssl-8.1
- stdlib-3.2
- syntax_tools-2.1.1
- tools-2.9
- wx-1.8
Unchanged Applications:
- asn1-4.0.4
- cosEvent-2.2.1
- cosEventDomain-1.2.1
- cosFileTransfer-1.2.1
- cosNotification-1.2.2
- cosProperty-1.2.1
- cosTime-1.2.2
- cosTransactions-1.3.2
- debugger-4.2.1
- diameter-1.12.1
- eldap-1.2.2
- et-1.6
- gs-1.6.2
- ic-4.4.2
- jinterface-1.7.1
- megaco-3.18.1
- orber-3.8.2
- os_mon-2.4.1
- otp_mibs-1.1.1
- percept-0.9
- reltool-0.7.2
- snmp-5.2.4
- typer-0.9.11
- xmerl-1.3.12
* tag 'OTP-19.2':
Updated OTP version
Prepare release
Conflicts:
OTP_VERSION
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* richcarl/kernel/disk_log_tweaks/OTP-14057/PR-1245:
Pass log format through from handle()
Improve caching in disk_log
Use pattern matching for records where suitable
Eliminate more code duplication
Simplify for rflat
Clarify that the type for disk log data is iodata()
Pass through known size instead of recomputing
Use iolist_size instead of local function
Only read log format once in collect loop
Eliminate some code duplication
Rename internal function for clarity
Minor documentation cleanup
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* richcarl/code-change-utils/PR-1257/OTP-14059:
Update preloaded modules
Add shell mm() and lm() functions
Add code:module_status/1 and modified_modules/0
Fix spec for erlang:get_module_info()
Handle prefetched paths
Restructure code:which() and where_is_file()
Remove remnants of module package support
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These functions use the MD5 beam/native checksum to determine whether the
code for a module has changed on disk and is a candidate for loading.
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* maint:
Remove duplicate docs for the priority inet option
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* maint:
Update primary bootstrap
document {yield/nb_yield}() limitation
Suppress warnings from v3_kernel when inlining is turned on
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Hardware watchdog support was removed from heart in R13A, but there were
still some vestiges in the code and the documentation.
- Remove mentions of the HW_WD_DISABLE variable, as it's no longer used.
- Remove the HEART_BEAT_BOOT_DELAY variable, as it was only used for the
hardware watchdog.
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'gomoripeti/kernel/controlling_proc_badarg_doc/PR-1208/OTP-14022' into maint
* gomoripeti/kernel/controlling_proc_badarg_doc/PR-1208/OTP-14022:
controlling_process can return {error, badarg}
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For gen_tcp, gen_udp and gen_sctp controlling_process/2 can return
badarg if erlang:port_connect/2 fails with badarg. This can easily
happen if the new owner is not alive but in some race condition also
when the socket is closed right before port_connect/2 (and after the
previous socket function)
This commit documents this behaviour.
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In commit 3d70cee4034e, this text was changed to suggest that a list of Unix-specific permission bits would follow, but no such list was added. Let's revert back to the previous wording, so people won't look for a list that isn't there.
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* rickard/time-unit/OTP-13831:
Replace usage of deprecated time units
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code:add_pathsa/1 reverts the list of directories when adding it at
the beginning of the code path. The command line option '-pa' behaves
in the same way. This is now documented.
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