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diagnostics. Distinguish "incomplete escape sequence", "invalid special
character", and "unknown special character" from the generic "invalid
escape sequence", also promoting them from WARNING to ERROR because
incomplete escape sequences are severe syntax violations and because
encountering an invalid or unknown special character makes it likely
that part of the document content intended by the authors gets lost.
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and the roff_onearg() parsing function is too generic,
so provide a dedicated parsing function instead.
This fixes an assertion failure when an \o escape sequence is
passed as the argument; the bug was found by tb@ using afl(1).
It also makes mandoc output more similar to groff in various cases.
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index but use 0 instead of the argument, just like groff.
Warn about the invalid argument.
While here, fix the column number in another warning message.
Segfault reported by tb@, found with afl(1).
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suggested by Michael Stapelberg at debian dot org
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neither supports tbl(7) nor eqn(7) input.
If an input file contains such code anyway, tell the user
rather than failing an assert(3)ion.
Fixing a crash reported by Bjarni Ingi Gislason <bjarniig at rhi dot hi dot is>
in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901636 which the
Debian maintainer of mandoc, Michael at Stapelberg dot ch, forwarded to me.
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trying very hard to avoid false positives,
not at all trying to catch as many cases as possible;
feature originally suggested by tb@,
OK tb@ kn@ jmc@
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that is more useful for validating manuals of non-base software.
Nothing changes in -W all mode: by default for -T lint, we still
assume we want to check base system conventions, including usually
not wanting to link to non-base manual pages.
The use case, a partial idea how to handle it, and a preliminary
patch was originally presented by kn@, then refined by me.
Final patch tested and OK'ed by kn@.
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Jan Schreiber <jes at posteo dot de> ran afl on mandoc and it turned
out mandoc tried to use spacing modifiers so large that they would
trigger assertion failures in term_ascii.c, function locale_advance().
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disagrees with the section number given in the .Dt or .TH macro;
feature suggested and patch tested by jmc@
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as defining a term. Please only use it when automatic tagging does
not work. Manual page authors will not be required to add the new
macro; using it remains optional. HTML output is still rudimentary
in this version and will be polished later.
Thanks to kn@ for reminding me that i have been considering since
BSDCan 2014 whether something like this might be useful. Given
that possibilities of making automatic tagging better are running
out and there are still several situations where automatic tagging
cannot do the job, i think the time is now ripe.
Feedback and no objection from millert@; OK espie@ inoguchi@ kn@.
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without an argument, use the empty string, and always concatenate
all arguments, no matter their number.
This allows reducing the number of arguments of mandoc_normdate()
and some other simplifications, at the same time polishing some
error messages by adding the name of the macro in question.
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a heads-up on stderr at the end because otherwise, users may easily
miss the messages: because messages typically occur while parsing,
they typically preceed the output. This is most useful with flag
combinations like "-c -W all" but may also help in some unusual
error scenarios.
Inconvenient ordering of output originally pointed out by espie@
for the example situation that /tmp/ is not writeable.
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everywhere and not only in the parsers.
For more uniform messages, use it at more places instead of err(3),
in particular in the main program.
While here, integrate a few trivial functions called at exactly one
place into the main option parser, and let a few more functions use
the normal convention of returning 0 for success and -1 for error.
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found while testing on Debian jessie
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constants, and while stderr is a compile-time constant in OpenBSD,
Kelvin Sherlock <ksherlock at gmail dot com> reports that it isn't
on some other systems, for example on FreeBSD or Linux.
So do the initialization by calling mandoc_msg_setoutfile()
from main() instead.
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* Add the missing special character \_ (underscore).
* Partial implementations of \a (leader character)
and \E (uninterpreted escape character).
* Parse and ignore \r (reverse line feed).
* Add a WARNING message about undefined escape sequences.
* Add an UNSUPP message about unsupported escape sequences.
* Mark \! and \? (transparent throughput)
and \O (suppress output) as unsupported.
* Treat the various variants of zero-width spaces as one-byte escape
sequences rather than as special characters, to avoid defining bogus
forms with square brackets.
* For special characters with one-byte names, do not define bogus
forms with square brackets, except for \[-], which is valid.
* In the form with square brackets, undefined special characters do not
fall back to printing the name verbatim, not even for one-byte names.
* Starting a special character name with a blank is an error.
* Undefined escape sequences never abort formatting of the input
string, not even in HTML output mode.
* Document the newly handled escapes, and a few that were missing.
* Regression tests for most of the above.
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from mandoc_msg(), where it is no longer used.
While here, rename mandoc_vmsg() to mandoc_msg() and retire the
old version: There is really no point in having another function
merely to save "%s" in a few places.
Minus 140 lines of code.
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Finally, drop support for the run-time configurable mandocmsg()
callback. It was over-engineered from the start, never used for
anything in a decade, and repeatedly caused maintenance headaches.
Consolidate reporting infrastructure into two files, mandoc.h and
mandoc_msg.c, mopping up the bits and pieces that were scattered
around main.c, read.c, mandoc_parse.h, libmandoc.h, the prototypes
of four parsing-related functions, and both parser structs.
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