Clean up {mdoc,man}_pmsg and vmsg invocations (ignore return values).

[mandoc.git] / mandoc.1

diff --git a/mandoc.1 b/mandoc.1
index 187d7d40f3c61abf112c18a04bdabae891d14c5e..25b07f26b16cc9d6cbd4a151bc604d4d2baf3095 100644 (file)
--- a/mandoc.1
+++ b/mandoc.1
@@ -1,4 +1,4 @@
-.\"    $Id: mandoc.1,v 1.74 2010/08/07 17:46:39 kristaps Exp $
+.\"    $Id: mandoc.1,v 1.83 2010/12/20 13:57:49 kristaps Exp $

 .\"
 .\" Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
 .\"
 .\"
 .\" Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
 .\"


@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"

-.Dd $Mdocdate: August 7 2010 $
+.Dd $Mdocdate: December 20 2010 $

 .Dt MANDOC 1
 .Os
 .Sh NAME
 .Dt MANDOC 1
 .Os
 .Sh NAME


@@ -23,11 +23,10 @@
 .Sh SYNOPSIS
 .Nm mandoc
 .Op Fl V
 .Sh SYNOPSIS
 .Nm mandoc
 .Op Fl V

-.Op Fl f Ns Ar option

 .Op Fl m Ns Ar format
 .Op Fl O Ns Ar option
 .Op Fl T Ns Ar output
 .Op Fl m Ns Ar format
 .Op Fl O Ns Ar option
 .Op Fl T Ns Ar output

-.Op Fl W Ns Ar err
+.Op Fl W Ns Ar level

 .Op Ar file...
 .Sh DESCRIPTION
 The
 .Op Ar file...
 .Sh DESCRIPTION
 The


@@ -37,11 +36,6 @@ utility formats
 manual pages for display.
 The arguments are as follows:
 .Bl -tag -width Ds
 manual pages for display.
 The arguments are as follows:
 .Bl -tag -width Ds

-.It Fl f Ns Ar option
-Comma-separated compiler options.
-See
-.Sx Compiler Options
-for details.

 .It Fl m Ns Ar format
 Input format.
 See
 .It Fl m Ns Ar format
 Input format.
 See


@@ -60,18 +54,41 @@ Defaults to
 .Fl T Ns Cm ascii .
 .It Fl V
 Print version and exit.
 .Fl T Ns Cm ascii .
 .It Fl V
 Print version and exit.

-.It Fl W Ns Ar err
-Comma-separated warning options.
-Use
+.It Fl W Ns Ar level
+Specify the minimum message
+.Ar level
+to be reported on the standard error output and to affect the exit status.
+The
+.Ar level
+can be
+.Cm warning ,
+.Cm error ,
+or
+.Cm fatal .
+The default is
+.Fl W Ns Cm fatal ;

 .Fl W Ns Cm all
 .Fl W Ns Cm all

-to print warnings,
-.Fl W Ns Cm error
-for warnings to be considered errors and cause utility
-termination.
-Multiple
-.Fl W
-arguments may be comma-separated, such as
-.Fl W Ns Cm error , Ns Cm all .
+is an alias for
+.Fl W Ns Cm warning .
+See
+.Sx EXIT STATUS
+and
+.Sx DIAGNOSTICS
+for details.
+.Pp
+The special option
+.Fl W Ns Cm stop
+tells
+.Nm
+to exit after parsing a file that causes warnings or errors of at least
+the requested level.
+No formatted output will be produced from that file.
+If both a
+.Ar level
+and
+.Cm stop
+are requested, they can be joined with a comma, for example
+.Fl W Ns Cm error , Ns Cm stop .

 .It Ar file
 Read input from zero or more files.
 If unspecified, reads from stdin.
 .It Ar file
 Read input from zero or more files.
 If unspecified, reads from stdin.


@@ -91,8 +108,6 @@ text from stdin, implying
 and produces
 .Fl T Ns Cm ascii
 output.
 and produces
 .Fl T Ns Cm ascii
 output.

-.Pp
-.Ex -std mandoc

 .Ss Input Formats
 The
 .Nm
 .Ss Input Formats
 The
 .Nm


@@ -136,39 +151,6 @@ specified and
 or
 .Fl m Ns Cm an
 is specified, then this format is used exclusively.
 or
 .Fl m Ns Cm an
 is specified, then this format is used exclusively.

-.Ss Compiler Options
-Default
-.Xr mdoc 7
-and
-.Xr man 7
-compilation behaviour may be overridden with the
-.Fl f
-flag.
-.Bl -tag -width Ds
-.It Fl f Ns Cm ign-errors
-When parsing multiple files, don't halt when one errors out.
-Useful with
-.Fl T Ns Cm lint
-over a large set of manuals passed on the command line.
-.It Fl f Ns Cm ign-escape
-Ignore invalid escape sequences.
-This is the default, but the option can be used to override an earlier
-.Fl f Ns Cm strict .
-.It Fl f Ns Cm ign-scope
-When rewinding the scope of a block macro, forces the compiler to ignore
-scope violations.
-This can seriously mangle the resulting tree.
-.Pq mdoc only
-.It Fl f Ns Cm no-ign-escape
-Do not ignore invalid escape sequences.
-.It Fl f Ns Cm no-ign-macro
-Do not ignore unknown macros at the start of input lines.
-.It Fl f Ns Cm strict
-Implies
-.Fl f Ns Cm no-ign-escape
-and
-.Fl f Ns Cm no-ign-macro .
-.El

 .Ss Output Formats
 The
 .Nm
 .Ss Output Formats
 The
 .Nm


@@ -177,21 +159,18 @@ utility accepts the following
 arguments, which correspond to output modes:
 .Bl -tag -width Ds
 .It Fl T Ns Cm ascii
 arguments, which correspond to output modes:
 .Bl -tag -width Ds
 .It Fl T Ns Cm ascii

-Produce 7-bit ASCII output, backspace-encoded for bold and underline
-styles.
+Produce 7-bit ASCII output.

 This is the default.
 See
 .Sx ASCII Output .
 .It Fl T Ns Cm html
 This is the default.
 See
 .Sx ASCII Output .
 .It Fl T Ns Cm html

-Produce strict HTML-4.01 output, with a sane default style.
+Produce strict CSS1/HTML-4.01 output.

 See
 .Sx HTML Output .
 .It Fl T Ns Cm lint
 Parse only: produce no output.
 Implies
 See
 .Sx HTML Output .
 .It Fl T Ns Cm lint
 Parse only: produce no output.
 Implies

-.Fl W Ns Cm all
-and
-.Fl f Ns Cm strict .
+.Fl W Ns Cm warning .

 .It Fl T Ns Cm pdf
 Produce PDF output.
 See
 .It Fl T Ns Cm pdf
 Produce PDF output.
 See


@@ -203,7 +182,7 @@ See
 .It Fl T Ns Cm tree
 Produce an indented parse tree.
 .It Fl T Ns Cm xhtml
 .It Fl T Ns Cm tree
 Produce an indented parse tree.
 .It Fl T Ns Cm xhtml

-Produce strict XHTML-1.0 output, with a sane default style.
+Produce strict CSS1/XHTML-1.0 output.

 See
 .Sx XHTML Output .
 .El
 See
 .Sx XHTML Output .
 .El


@@ -248,16 +227,14 @@ Output produced by
 .Fl T Ns Cm html
 conforms to HTML-4.01 strict.
 .Pp
 .Fl T Ns Cm html
 conforms to HTML-4.01 strict.
 .Pp

-Font styles and page structure are applied using CSS2.
-By default, no font style is applied to any text,
-although CSS2 is hard-coded to format
-the basic structure of output.
-.Pp

 The
 .Pa example.style.css
 The
 .Pa example.style.css

-file documents the range of styles applied to output and, if used, will
-cause rendered documents to appear as they do in
-.Fl T Ns Cm ascii .
+file documents style-sheet classes available for customising output.
+If a style-sheet is not specified with
+.Fl O Ns Ar style ,
+.Fl T Ns Cm html
+defaults to simple output readable in any graphical or text-based web
+browser.

 .Pp
 Special characters are rendered in decimal-encoded UTF-8.
 .Pp
 .Pp
 Special characters are rendered in decimal-encoded UTF-8.
 .Pp


@@ -352,30 +329,133 @@ See
 .Sx HTML Output
 for details; beyond generating XHTML tags instead of HTML tags, these
 output modes are identical.
 .Sx HTML Output
 for details; beyond generating XHTML tags instead of HTML tags, these
 output modes are identical.

+.Sh EXIT STATUS
+The
+.Nm
+utility exits with one of the following values, controlled by the message
+.Ar level
+associated with the
+.Fl W
+option:
+.Pp
+.Bl -tag -width Ds -compact
+.It 0
+No warnings or errors occurred, or those that did were ignored because
+they were lower than the requested
+.Ar level .
+.It 2
+At least one warning occurred, but no error, and
+.Fl W Ns Cm warning
+was specified.
+.It 3
+At least one parsing error occurred, but no fatal error, and
+.Fl W Ns Cm error
+or
+.Fl W Ns Cm warning
+was specified.
+.It 4
+A fatal parsing error occurred.
+.It 5
+Invalid command line arguments were specified.
+No input files have been read.
+.It 6
+An operating system error occurred, for example memory exhaustion or an
+error accessing input files.
+Such errors cause
+.Nm
+to exit at once, possibly in the middle of parsing or formatting a file.
+.El
+.Pp
+Note that selecting
+.Fl T Ns Cm lint
+output mode implies
+.Fl W Ns Cm warning .

 .Sh EXAMPLES
 To page manuals to the terminal:
 .Pp
 .Sh EXAMPLES
 To page manuals to the terminal:
 .Pp

-.D1 $ mandoc \-Wall,error \-fstrict mandoc.1 2\*(Gt&1 | less
-.D1 $ mandoc mandoc.1 mdoc.3 mdoc.7 | less
+.Dl $ mandoc \-Wall,stop mandoc.1 2\*(Gt&1 | less
+.Dl $ mandoc mandoc.1 mdoc.3 mdoc.7 | less

 .Pp
 To produce HTML manuals with
 .Ar style.css
 as the style-sheet:
 .Pp
 .Pp
 To produce HTML manuals with
 .Ar style.css
 as the style-sheet:
 .Pp

-.D1 $ mandoc \-Thtml -Ostyle=style.css mdoc.7 \*(Gt mdoc.7.html
+.Dl $ mandoc \-Thtml -Ostyle=style.css mdoc.7 \*(Gt mdoc.7.html

 .Pp
 To check over a large set of manuals:
 .Pp
 .Pp
 To check over a large set of manuals:
 .Pp

-.Dl $ mandoc \-Tlint \-fign-errors `find /usr/src -name \e*\e.[1-9]`
+.Dl $ mandoc \-Tlint `find /usr/src -name \e*\e.[1-9]`

 .Pp
 To produce a series of PostScript manuals for A4 paper:
 .Pp
 .Pp
 To produce a series of PostScript manuals for A4 paper:
 .Pp

-.D1 $ mandoc \-Tps \-Opaper=a4 mdoc.7 man.7 \*(Gt manuals.ps
+.Dl $ mandoc \-Tps \-Opaper=a4 mdoc.7 man.7 \*(Gt manuals.ps
+.Sh DIAGNOSTICS
+Standard error messages reporting parsing errors are prefixed by
+.Pp
+.Sm off
+.D1 Ar file : line : column : \ level :
+.Sm on
+.Pp
+where the fields have the following meanings:
+.Bl -tag -width "column"
+.It Ar file
+The name of the input file causing the message.
+.It Ar line
+The line number in that input file.
+Line numbering starts at 1.
+.It Ar column
+The column number in that input file.
+Column numbering starts at 1.
+If the issue is caused by a word, the column number usually
+points to the first character of the word.
+.It Ar level
+The message level, printed in capital letters.
+.El
+.Pp
+Message levels have the following meanings:
+.Bl -tag -width "warning"
+.It Cm fatal
+The parser is unable to parse a given input file at all.
+No formatted output is produced from that input file.
+.It Cm error
+An input file contains syntax that cannot be safely interpreted,
+either because it is invalid or because
+.Nm
+does not implement it yet.
+By discarding part of the input or inserting missing tokens,
+the parser is able to continue, and the error does not prevent
+generation of formatted output, but typically, preparing that
+output involves information loss, broken document structure
+or unintended formatting.
+.It Cm warning
+An input file uses obsolete, discouraged or non-portable syntax.
+All the same, the meaning of the input is unambiguous and a correct
+rendering can be produced.
+Documents causing warnings may render poorly when using other
+formatting tools instead of
+.Nm .
+.El
+.Pp
+Messages of the
+.Cm warning
+and
+.Cm error
+levels are hidden unless their level, or a lower level, is requested using a
+.Fl W
+option or
+.Fl T Ns Cm lint
+output mode.
+.Pp
+The
+.Nm
+utility may also print messages related to invalid command line arguments
+or operating system errors, for example when memory is exhausted or
+input files cannot be read.
+Such messages do not carry the prefix described above.

 .Sh COMPATIBILITY
 This section summarises
 .Nm
 .Sh COMPATIBILITY
 This section summarises
 .Nm

-compatibility with
-.Xr groff 1 .
+compatibility with GNU troff.

 Each input and output format is separately noted.
 .Ss ASCII Compatibility
 .Bl -bullet -compact
 Each input and output format is separately noted.
 .Ss ASCII Compatibility
 .Bl -bullet -compact


@@ -390,9 +470,7 @@ in
 .Fl T Ns Cm ascii
 are synonyms, as are \-filled and \-ragged.
 .It
 .Fl T Ns Cm ascii
 are synonyms, as are \-filled and \-ragged.
 .It

-In
-.Xr groff 1 ,
-the
+In GNU troff, the

 .Sq \&Pa
 .Xr mdoc 7
 macro does not underline when scoped under an
 .Sq \&Pa
 .Xr mdoc 7
 macro does not underline when scoped under an


@@ -460,15 +538,6 @@ The
 utility was written by
 .An Kristaps Dzonsons Aq kristaps@bsd.lv .
 .Sh CAVEATS
 utility was written by
 .An Kristaps Dzonsons Aq kristaps@bsd.lv .
 .Sh CAVEATS

-The
-.Fl T Ns Cm html
-and
-.Fl T Ns Cm xhtml
-CSS2 styling used for
-.Fl m Ns Cm doc
-input lists does not render properly in older browsers, such as Internet
-Explorer 6 and earlier.
-.Pp

 In
 .Fl T Ns Cm html
 and
 In
 .Fl T Ns Cm html
 and


@@ -480,17 +549,6 @@ Be aware of this when setting long link
 formats such as
 .Fl O Ns Cm style Ns = Ns Ar really/long/link .
 .Pp
 formats such as
 .Fl O Ns Cm style Ns = Ns Ar really/long/link .
 .Pp

-The
-.Fl T Ns Cm html
-and
-.Fl T Ns Cm xhtml
-output modes don't render the
-.Sq \es
-font size escape documented in
-.Xr mdoc 7
-and
-.Xr man 7 .
-.Pp

 Nesting elements within next-line element scopes of
 .Fl m Ns Cm an ,
 such as
 Nesting elements within next-line element scopes of
 .Fl m Ns Cm an ,
 such as


@@ -504,12 +562,6 @@ and
 and cause them to forget the formatting of the prior next-line scope.
 .Pp
 The
 and cause them to forget the formatting of the prior next-line scope.
 .Pp
 The

-.Sq i
-macro in
-.Fl m Ns Cm an
-should italicise all subsequent text if a line argument is not provided.
-This behaviour is not implemented.
-The

 .Sq \(aq
 control character is an alias for the standard macro control character
 and does not emit a line-break as stipulated in GNU troff.
 .Sq \(aq
 control character is an alias for the standard macro control character
 and does not emit a line-break as stipulated in GNU troff.