tool: use our own stderr variable

Earlier this year we changed our own stderr variable to use the standard
name `stderr` (to avoid bugs where someone is using `stderr` instead of
the

tool: use our own stderr variable

Earlier this year we changed our own stderr variable to use the standard
name `stderr` (to avoid bugs where someone is using `stderr` instead of
the curl-tool specific variable). This solution needed to override the
standard `stderr` symbol via the preprocessor. This in turn didn't play
well with unity builds and caused curl tool to crash or stay silent due
to an uninitialized stderr. This was a hard to find issue, fixed by
manually breaking out one file from the unity sources.

To avoid two these two tricks, this patch implements a different
solution: Restore using our own local variable for our stderr output and
leave `stderr` as-is. To avoid using `stderr` by mistake, add a
`checksrc` rule (based on logic we already used in lib for `strerror`)
that detects any `stderr` use in `src` and points to using our own
variable instead: `tool_stderr`.

Follow-up to 06133d3e9b8aeb9e9ca0b3370c246bdfbfc8619e
Follow-up to 2f17a9b654121dd1ecf4fc043c6d08a9da3522db

Closes #11958

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tool: improve --stderr handling

- freopen stderr with the user-specified file (--stderr file) instead of
using a separate 'errors' stream.

- In tool_setup.h override stdio.h's

tool: improve --stderr handling

- freopen stderr with the user-specified file (--stderr file) instead of
using a separate 'errors' stream.

- In tool_setup.h override stdio.h's stderr macro as global variable
tool_stderr.

Both freopen and overriding the stderr macro are necessary because if
the user-specified filename is "-" then stdout is assigned to
tool_stderr and no freopen takes place. See the PR for more information.

Ref: https://github.com/curl/curl/issues/10491

Closes https://github.com/curl/curl/pull/10673

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misc: remove support for curl_off_t < 8 bytes

Closes #10597

tool_progress: shut off progress meter for --silent in parallel

Reported-by: finkjsc on github
Fixes #10573
Closes #10579

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
- save

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

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tool_progress: remove 'Qd' from the parallel progress bar

The "queued" value is no longer showing anything useful to the user. It
is an internal number of transfers waiting at that momen

tool_progress: remove 'Qd' from the parallel progress bar

The "queued" value is no longer showing anything useful to the user. It
is an internal number of transfers waiting at that moment.

Closes #9389

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tool_progress: avoid division by zero in parallel progress meter

Reported-by: Brian Carpenter
Fixes #9082
Closes #9083

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the file
`.reuse/dep5`.

This commit also adds a Github workflow to check pull requests and adapts
copyright.pl to the changes.

Closes #8869

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tool_operate: Fix --fail-early with parallel transfers

- Abort via progress callback to fail early during parallel transfers.

When a critical error occurs during a transfer (eg --fa

tool_operate: Fix --fail-early with parallel transfers

- Abort via progress callback to fail early during parallel transfers.

When a critical error occurs during a transfer (eg --fail-early
constraint) then other running transfers will be aborted via progress
callback and finish with error CURLE_ABORTED_BY_CALLBACK (42). In this
case, the callback error does not become the most recent error and a
custom error message is used for those transfers:

curld --fail --fail-early --parallel
https://httpbin.org/status/404 https://httpbin.org/delay/10

curl: (22) The requested URL returned error: 404
curl: (42) Transfer aborted due to critical error in another transfer

> echo %ERRORLEVEL%
22

Fixes https://github.com/curl/curl/issues/6939
Closes https://github.com/curl/curl/pull/6984

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tool_progress: Fix progress meter in parallel mode

Make sure the total amount of DL/UL bytes are counted before the
transfer finalizes. Otherwise if a transfer finishes too quick, its

tool_progress: Fix progress meter in parallel mode

Make sure the total amount of DL/UL bytes are counted before the
transfer finalizes. Otherwise if a transfer finishes too quick, its
total numbers are not added, and results in a DL%/UL% that goes above
100%.

Detail:

progress_meter() is called periodically, and it may not catch a
transfer's total bytes if the value was unknown during the last call,
and the transfer is finished and deleted (i.e., lost) during the next
call.

Closes https://github.com/curl/curl/pull/6840

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config: remove CURL_SIZEOF_CURL_OFF_T use only SIZEOF_CURL_OFF_T

Make the code consistently use a single name for the size of the
"curl_off_t" type.

Closes #6702

infof/failf calls: fix format specifiers

Update a few format specifiers to match what is being printed.

Closes #6241

curl.se: new home

Closes #6172

curl: remove 'config' field from OutStruct

As it was just unnecessary duplicated information already stored in the
'per_transfer' struct and that's around mostly anyway.

The dup

curl: remove 'config' field from OutStruct

As it was just unnecessary duplicated information already stored in the
'per_transfer' struct and that's around mostly anyway.

The duplicated pointer caused problems when the code flow was aborted
before the dupe was filled in and could cause a NULL pointer access.

Reported-by: Brian Carpenter
Fixes #4807
Closes #4810

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curl: fix --upload-file . hangs if delay in STDIN

Attempt to unpause a busy read in the CURLOPT_XFERINFOFUNCTION.

When uploading from stdin in non-blocking mode, a delay in reading

curl: fix --upload-file . hangs if delay in STDIN

Attempt to unpause a busy read in the CURLOPT_XFERINFOFUNCTION.

When uploading from stdin in non-blocking mode, a delay in reading
the stream (EAGAIN) causes curl to pause sending data
(CURL_READFUNC_PAUSE). Prior to this change, a busy read was
detected and unpaused only in the CURLOPT_WRITEFUNCTION handler.
This change performs the same busy read handling in a
CURLOPT_XFERINFOFUNCTION handler.

Fixes #2051
Closes #4599
Reported-by: bdry on github

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curl: support parallel transfers

This is done by making sure each individual transfer is first added to a
linked list as then they can be performed serially, or at will, in
parallel.

curl: support parallel transfers

This is done by making sure each individual transfer is first added to a
linked list as then they can be performed serially, or at will, in
parallel.

Closes #3804

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curl tool: reviewed code moved to tool_*.[ch] files

my_setopt and my_setopt_str no longer ignores curl_easy_setopt result.

Fixed some OOM handling issues.