Annotation of src/usr.bin/mandoc/mandoc.1, Revision 1.146
1.146 ! schwarze 1: .\" $OpenBSD: mandoc.1,v 1.145 2017/11/28 20:26:03 schwarze Exp $
1.1 kristaps 2: .\"
1.44 schwarze 3: .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.146 ! schwarze 4: .\" Copyright (c) 2012, 2014-2018 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: .\"
6: .\" Permission to use, copy, modify, and distribute this software for any
1.3 schwarze 7: .\" purpose with or without fee is hereby granted, provided that the above
8: .\" copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: .\"
1.3 schwarze 10: .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 17: .\"
1.146 ! schwarze 18: .Dd $Mdocdate: November 28 2017 $
1.2 deraadt 19: .Dt MANDOC 1
1.1 kristaps 20: .Os
21: .Sh NAME
22: .Nm mandoc
1.105 schwarze 23: .Nd format manual pages
1.1 kristaps 24: .Sh SYNOPSIS
25: .Nm mandoc
1.108 schwarze 26: .Op Fl ac
1.80 schwarze 27: .Op Fl I Cm os Ns = Ns Ar name
28: .Op Fl K Ar encoding
1.104 schwarze 29: .Op Fl mdoc | man
1.108 schwarze 30: .Op Fl O Ar options
1.80 schwarze 31: .Op Fl T Ar output
32: .Op Fl W Ar level
1.45 schwarze 33: .Op Ar
1.1 kristaps 34: .Sh DESCRIPTION
35: The
36: .Nm
1.10 schwarze 37: utility formats
1.1 kristaps 38: .Ux
1.25 jmc 39: manual pages for display.
1.53 schwarze 40: .Pp
41: By default,
42: .Nm
43: reads
44: .Xr mdoc 7
45: or
46: .Xr man 7
1.104 schwarze 47: text from stdin and produces
1.80 schwarze 48: .Fl T Cm locale
1.53 schwarze 49: output.
50: .Pp
1.61 schwarze 51: The options are as follows:
1.5 schwarze 52: .Bl -tag -width Ds
1.60 schwarze 53: .It Fl a
54: If the standard output is a terminal device and
55: .Fl c
56: is not specified, use
57: .Xr more 1
58: to paginate the output, just like
59: .Xr man 1
60: would.
61: .It Fl c
62: Copy the formatted manual pages to the standard output without using
63: .Xr more 1
64: to paginate them.
65: This is the default.
66: It can be specified to override
67: .Fl a .
1.80 schwarze 68: .It Fl I Cm os Ns = Ns Ar name
1.54 schwarze 69: Override the default operating system
70: .Ar name
71: for the
72: .Xr mdoc 7
1.104 schwarze 73: .Ic \&Os
1.70 schwarze 74: and for the
75: .Xr man 7
1.104 schwarze 76: .Ic \&TH
1.54 schwarze 77: macro.
1.80 schwarze 78: .It Fl K Ar encoding
1.64 schwarze 79: Specify the input encoding.
80: The supported
81: .Ar encoding
82: arguments are
83: .Cm us-ascii ,
84: .Cm iso-8859-1 ,
85: and
86: .Cm utf-8 .
1.100 schwarze 87: If not specified, autodetection uses the first match in the following
88: list:
89: .Bl -enum
90: .It
91: If the first three bytes of the input file are the UTF-8 byte order
92: mark (BOM, 0xefbbbf), input is interpreted as
93: .Cm utf-8 .
94: .It
95: If the first or second line of the input file matches the
1.64 schwarze 96: .Sy emacs
97: mode line format
98: .Pp
99: .D1 .\e" -*- Oo ...; Oc coding: Ar encoding ; No -*-
1.100 schwarze 100: .Pp
101: then input is interpreted according to
102: .Ar encoding .
103: .It
104: If the first non-ASCII byte in the file introduces a valid UTF-8
105: sequence, input is interpreted as
106: .Cm utf-8 .
107: .It
108: Otherwise, input is interpreted as
109: .Cm iso-8859-1 .
1.64 schwarze 110: .El
1.104 schwarze 111: .It Fl mdoc | man
112: With
113: .Fl mdoc ,
114: all input files are interpreted as
115: .Xr mdoc 7 .
116: With
117: .Fl man ,
118: all input files are interpreted as
119: .Xr man 7 .
120: By default, the input language is automatically detected for each file:
1.145 schwarze 121: if the first macro is
1.104 schwarze 122: .Ic \&Dd
123: or
124: .Ic \&Dt ,
125: the
126: .Xr mdoc 7
127: parser is used; otherwise, the
128: .Xr man 7
129: parser is used.
130: With other arguments,
131: .Fl m
132: is silently ignored.
1.108 schwarze 133: .It Fl O Ar options
1.25 jmc 134: Comma-separated output options.
1.80 schwarze 135: .It Fl T Ar output
1.25 jmc 136: Output format.
137: See
1.1 kristaps 138: .Sx Output Formats
1.25 jmc 139: for available formats.
140: Defaults to
1.80 schwarze 141: .Fl T Cm locale .
142: .It Fl W Ar level
1.38 schwarze 143: Specify the minimum message
144: .Ar level
145: to be reported on the standard error output and to affect the exit status.
146: The
147: .Ar level
148: can be
1.126 schwarze 149: .Cm base ,
1.109 schwarze 150: .Cm style ,
1.73 schwarze 151: .Cm warning ,
152: .Cm error ,
1.38 schwarze 153: or
1.126 schwarze 154: .Cm unsupp .
155: The
156: .Cm base
157: level automatically derives the operating system from the contents of the
158: .Ic \&Os
159: macro, from the
160: .Fl Ios
161: command line option, or from the
162: .Xr uname 3
163: return value.
164: The levels
165: .Cm openbsd
166: and
167: .Cm netbsd
168: are variants of
169: .Cm base
170: that bypass autodetection and request validation of base system
171: conventions for a particular operating system.
172: The level
1.72 schwarze 173: .Cm all
1.38 schwarze 174: is an alias for
1.126 schwarze 175: .Cm base .
1.72 schwarze 176: By default,
177: .Nm
178: is silent.
1.38 schwarze 179: See
180: .Sx EXIT STATUS
181: and
182: .Sx DIAGNOSTICS
183: for details.
184: .Pp
185: The special option
1.80 schwarze 186: .Fl W Cm stop
1.38 schwarze 187: tells
188: .Nm
189: to exit after parsing a file that causes warnings or errors of at least
190: the requested level.
191: No formatted output will be produced from that file.
192: If both a
193: .Ar level
194: and
195: .Cm stop
196: are requested, they can be joined with a comma, for example
1.80 schwarze 197: .Fl W Cm error , Ns Cm stop .
1.26 jmc 198: .It Ar file
199: Read input from zero or more files.
1.25 jmc 200: If unspecified, reads from stdin.
201: If multiple files are specified,
1.1 kristaps 202: .Nm
203: will halt with the first failed parse.
204: .El
1.61 schwarze 205: .Pp
1.107 schwarze 206: The options
207: .Fl fhklw
208: are also supported and are documented in man(1).
1.61 schwarze 209: In
210: .Fl f
211: and
212: .Fl k
213: mode,
214: .Nm
215: also supports the options
1.107 schwarze 216: .Fl CMmOSs
1.61 schwarze 217: described in the
218: .Xr apropos 1
219: manual.
1.106 schwarze 220: The options
221: .Fl fkl
222: are mutually exclusive and override each other.
1.1 kristaps 223: .Ss Output Formats
224: The
225: .Nm
226: utility accepts the following
227: .Fl T
1.34 schwarze 228: arguments, which correspond to output modes:
1.99 schwarze 229: .Bl -tag -width "-T markdown"
1.80 schwarze 230: .It Fl T Cm ascii
1.42 schwarze 231: Produce 7-bit ASCII output.
1.25 jmc 232: See
1.20 schwarze 233: .Sx ASCII Output .
1.80 schwarze 234: .It Fl T Cm html
1.69 schwarze 235: Produce HTML5, CSS1, and MathML output.
1.25 jmc 236: See
1.20 schwarze 237: .Sx HTML Output .
1.80 schwarze 238: .It Fl T Cm lint
1.26 jmc 239: Parse only: produce no output.
240: Implies
1.141 schwarze 241: .Fl W Cm all
242: and redirects parser messages, which usually appear
243: on standard error output, to standard output.
1.80 schwarze 244: .It Fl T Cm locale
1.48 jmc 245: Encode output using the current locale.
1.68 schwarze 246: This is the default.
1.48 jmc 247: See
248: .Sx Locale Output .
1.80 schwarze 249: .It Fl T Cm man
1.49 schwarze 250: Produce
1.46 schwarze 251: .Xr man 7
1.49 schwarze 252: format output.
253: See
254: .Sx Man Output .
1.99 schwarze 255: .It Fl T Cm markdown
256: Produce output in
257: .Sy markdown
258: format.
259: See
260: .Sx Markdown Output .
1.80 schwarze 261: .It Fl T Cm pdf
1.36 schwarze 262: Produce PDF output.
263: See
264: .Sx PDF Output .
1.80 schwarze 265: .It Fl T Cm ps
1.31 schwarze 266: Produce PostScript output.
267: See
268: .Sx PostScript Output .
1.80 schwarze 269: .It Fl T Cm tree
1.26 jmc 270: Produce an indented parse tree.
1.85 schwarze 271: See
272: .Sx Syntax tree output .
1.80 schwarze 273: .It Fl T Cm utf8
1.48 jmc 274: Encode output in the UTF\-8 multi-byte format.
275: See
276: .Sx UTF\-8 Output .
1.1 kristaps 277: .El
278: .Pp
279: If multiple input files are specified, these will be processed by the
280: corresponding filter in-order.
1.34 schwarze 281: .Ss ASCII Output
282: Output produced by
1.80 schwarze 283: .Fl T Cm ascii
1.68 schwarze 284: is rendered in standard 7-bit ASCII documented in
1.34 schwarze 285: .Xr ascii 7 .
286: .Pp
287: Font styles are applied by using back-spaced encoding such that an
288: underlined character
289: .Sq c
290: is rendered as
291: .Sq _ Ns \e[bs] Ns c ,
292: where
293: .Sq \e[bs]
294: is the back-space character number 8.
295: Emboldened characters are rendered as
296: .Sq c Ns \e[bs] Ns c .
297: .Pp
298: The special characters documented in
299: .Xr mandoc_char 7
300: are rendered best-effort in an ASCII equivalent.
301: .Pp
302: Output width is limited to 78 visible columns unless literal input lines
303: exceed this limit.
304: .Pp
305: The following
306: .Fl O
307: arguments are accepted:
1.5 schwarze 308: .Bl -tag -width Ds
1.51 schwarze 309: .It Cm indent Ns = Ns Ar indent
310: The left margin for normal text is set to
311: .Ar indent
312: blank characters instead of the default of five for
313: .Xr mdoc 7
314: and seven for
315: .Xr man 7 .
316: Increasing this is not recommended; it may result in degraded formatting,
1.52 jmc 317: for example overfull lines or ugly line breaks.
1.142 schwarze 318: .It Cm mdoc
319: Format
320: .Xr man 7
321: input files in
322: .Xr mdoc 7
323: output style.
324: Specifically, this suppresses the two additional blank lines near the
325: top and the bottom of each page, and it implies
326: .Fl O Cm indent Ns =5 .
327: One useful application is for checking that
328: .Fl T Cm man
329: output formats in the same way as the
330: .Xr mdoc 7
331: source it was generated from.
1.34 schwarze 332: .It Cm width Ns = Ns Ar width
333: The output width is set to
1.123 schwarze 334: .Ar width .
1.1 kristaps 335: .El
1.34 schwarze 336: .Ss HTML Output
337: Output produced by
1.80 schwarze 338: .Fl T Cm html
1.63 schwarze 339: conforms to HTML5 using optional self-closing tags.
1.69 schwarze 340: Default styles use only CSS1.
341: Equations rendered from
342: .Xr eqn 7
343: blocks use MathML.
1.34 schwarze 344: .Pp
1.30 schwarze 345: The
1.88 schwarze 346: .Pa mandoc.css
1.42 schwarze 347: file documents style-sheet classes available for customising output.
348: If a style-sheet is not specified with
1.80 schwarze 349: .Fl O Cm style ,
350: .Fl T Cm html
1.63 schwarze 351: defaults to simple output (via an embedded style-sheet)
352: readable in any graphical or text-based web
1.42 schwarze 353: browser.
1.34 schwarze 354: .Pp
1.45 schwarze 355: Special characters are rendered in decimal-encoded UTF\-8.
1.34 schwarze 356: .Pp
357: The following
1.33 schwarze 358: .Fl O
1.34 schwarze 359: arguments are accepted:
1.17 schwarze 360: .Bl -tag -width Ds
1.49 schwarze 361: .It Cm fragment
1.67 bentley 362: Omit the <!DOCTYPE> declaration and the <html>, <head>, and <body>
363: elements and only emit the subtree below the <body> element.
1.49 schwarze 364: The
365: .Cm style
1.50 schwarze 366: argument will be ignored.
1.49 schwarze 367: This is useful when embedding manual content within existing documents.
1.33 schwarze 368: .It Cm includes Ns = Ns Ar fmt
1.17 schwarze 369: The string
370: .Ar fmt ,
1.21 schwarze 371: for example,
1.17 schwarze 372: .Ar ../src/%I.html ,
373: is used as a template for linked header files (usually via the
1.104 schwarze 374: .Ic \&In
1.25 jmc 375: macro).
376: Instances of
1.17 schwarze 377: .Sq \&%I
1.25 jmc 378: are replaced with the include filename.
379: The default is not to present a
1.17 schwarze 380: hyperlink.
1.33 schwarze 381: .It Cm man Ns = Ns Ar fmt
1.17 schwarze 382: The string
383: .Ar fmt ,
1.21 schwarze 384: for example,
1.17 schwarze 385: .Ar ../html%S/%N.%S.html ,
386: is used as a template for linked manuals (usually via the
1.104 schwarze 387: .Ic \&Xr
1.25 jmc 388: macro).
389: Instances of
1.17 schwarze 390: .Sq \&%N
391: and
392: .Sq %S
393: are replaced with the linked manual's name and section, respectively.
1.25 jmc 394: If no section is included, section 1 is assumed.
395: The default is not to
1.17 schwarze 396: present a hyperlink.
1.33 schwarze 397: .It Cm style Ns = Ns Ar style.css
1.26 jmc 398: The file
399: .Ar style.css
400: is used for an external style-sheet.
401: This must be a valid absolute or
402: relative URI.
1.30 schwarze 403: .El
1.48 jmc 404: .Ss Locale Output
405: Locale-depending output encoding is triggered with
1.80 schwarze 406: .Fl T Cm locale .
1.68 schwarze 407: This is the default.
408: .Pp
1.48 jmc 409: This option is not available on all systems: systems without locale
410: support, or those whose internal representation is not natively UCS-4,
411: will fall back to
1.80 schwarze 412: .Fl T Cm ascii .
1.48 jmc 413: See
414: .Sx ASCII Output
415: for font style specification and available command-line arguments.
1.49 schwarze 416: .Ss Man Output
417: Translate input format into
418: .Xr man 7
419: output format.
1.55 jmc 420: This is useful for distributing manual sources to legacy systems
1.49 schwarze 421: lacking
422: .Xr mdoc 7
423: formatters.
424: .Pp
425: If
426: .Xr mdoc 7
427: is passed as input, it is translated into
1.50 schwarze 428: .Xr man 7 .
429: If the input format is
1.49 schwarze 430: .Xr man 7 ,
1.50 schwarze 431: the input is copied to the output, expanding any
1.49 schwarze 432: .Xr roff 7
1.104 schwarze 433: .Ic so
1.50 schwarze 434: requests.
435: The parser is also run, and as usual, the
436: .Fl W
437: level controls which
438: .Sx DIAGNOSTICS
439: are displayed before copying the input to the output.
1.99 schwarze 440: .Ss Markdown Output
441: Translate
442: .Xr mdoc 7
443: input to the
444: .Sy markdown
445: format conforming to
446: .Lk http://daringfireball.net/projects/markdown/syntax.text\
447: "John Gruber's 2004 specification" .
1.102 schwarze 448: The output also almost conforms to the
449: .Lk http://commonmark.org/ CommonMark
450: specification.
451: .Pp
452: The character set used for the markdown output is ASCII.
453: Non-ASCII characters are encoded as HTML entities.
454: Since that is not possible in literal font contexts, because these
455: are rendered as code spans and code blocks in the markdown output,
456: non-ASCII characters are transliterated to ASCII approximations in
457: these contexts.
1.99 schwarze 458: .Pp
459: Markdown is a very weak markup language, so all semantic markup is
460: lost, and even part of the presentational markup may be lost.
461: Do not use this as an intermediate step in converting to HTML;
462: instead, use
463: .Fl T Cm html
464: directly.
465: .Pp
466: The
467: .Xr man 7 ,
468: .Xr tbl 7 ,
469: and
470: .Xr eqn 7
471: input languages are not supported by
472: .Fl T Cm markdown
473: output mode.
1.48 jmc 474: .Ss PDF Output
475: PDF-1.1 output may be generated by
1.80 schwarze 476: .Fl T Cm pdf .
1.48 jmc 477: See
478: .Sx PostScript Output
479: for
480: .Fl O
481: arguments and defaults.
1.31 schwarze 482: .Ss PostScript Output
1.33 schwarze 483: PostScript
484: .Qq Adobe-3.0
485: Level-2 pages may be generated by
1.80 schwarze 486: .Fl T Cm ps .
1.35 schwarze 487: Output pages default to letter sized and are rendered in the Times font
488: family, 11-point.
489: Margins are calculated as 1/9 the page length and width.
490: Line-height is 1.4m.
1.34 schwarze 491: .Pp
492: Special characters are rendered as in
493: .Sx ASCII Output .
494: .Pp
495: The following
496: .Fl O
497: arguments are accepted:
498: .Bl -tag -width Ds
499: .It Cm paper Ns = Ns Ar name
500: The paper size
501: .Ar name
502: may be one of
1.35 schwarze 503: .Ar a3 ,
504: .Ar a4 ,
505: .Ar a5 ,
506: .Ar legal ,
1.34 schwarze 507: or
508: .Ar letter .
1.35 schwarze 509: You may also manually specify dimensions as
510: .Ar NNxNN ,
511: width by height in millimetres.
512: If an unknown value is encountered,
513: .Ar letter
514: is used.
1.34 schwarze 515: .El
1.48 jmc 516: .Ss UTF\-8 Output
517: Use
1.80 schwarze 518: .Fl T Cm utf8
1.48 jmc 519: to force a UTF\-8 locale.
1.36 schwarze 520: See
1.48 jmc 521: .Sx Locale Output
522: for details and options.
1.85 schwarze 523: .Ss Syntax tree output
524: Use
525: .Fl T Cm tree
526: to show a human readable representation of the syntax tree.
527: It is useful for debugging the source code of manual pages.
1.86 jmc 528: The exact format is subject to change, so don't write parsers for it.
1.94 schwarze 529: .Pp
530: The first paragraph shows meta data found in the
531: .Xr mdoc 7
532: prologue, on the
533: .Xr man 7
534: .Ic \&TH
535: line, or the fallbacks used.
536: .Pp
537: In the tree dump, each output line shows one syntax tree node.
1.85 schwarze 538: Child nodes are indented with respect to their parent node.
539: The columns are:
540: .Pp
541: .Bl -enum -compact
542: .It
543: For macro nodes, the macro name; for text and
544: .Xr tbl 7
1.86 jmc 545: nodes, the content.
546: There is a special format for
1.85 schwarze 547: .Xr eqn 7
548: nodes.
549: .It
550: Node type (text, elem, block, head, body, body-end, tail, tbl, eqn).
551: .It
552: Flags:
553: .Bl -dash -compact
554: .It
555: An opening parenthesis if the node is an opening delimiter.
556: .It
557: An asterisk if the node starts a new input line.
558: .It
559: The input line number (starting at one).
560: .It
561: A colon.
562: .It
563: The input column number (starting at one).
564: .It
565: A closing parenthesis if the node is a closing delimiter.
566: .It
567: A full stop if the node ends a sentence.
1.93 schwarze 568: .It
1.98 schwarze 569: BROKEN if the node is a block broken by another block.
570: .It
1.93 schwarze 571: NOSRC if the node is not in the input file,
572: but automatically generated from macros.
573: .It
574: NOPRT if the node is not supposed to generate output
575: for any output format.
1.85 schwarze 576: .El
1.98 schwarze 577: .El
578: .Pp
579: The following
580: .Fl O
581: argument is accepted:
582: .Bl -tag -width Ds
583: .It Cm noval
584: Skip validation and show the unvalidated syntax tree.
585: This can help to find out whether a given behaviour is caused by
586: the parser or by the validator.
587: Meta data is not available in this case.
1.85 schwarze 588: .El
1.60 schwarze 589: .Sh ENVIRONMENT
590: .Bl -tag -width MANPAGER
591: .It Ev MANPAGER
592: Any non-empty value of the environment variable
593: .Ev MANPAGER
1.103 schwarze 594: is used instead of the standard pagination program,
595: .Xr more 1 ;
596: see
597: .Xr man 1
598: for details.
599: Only used if
600: .Fl a
601: or
602: .Fl l
603: is specified.
1.60 schwarze 604: .It Ev PAGER
605: Specifies the pagination program to use when
606: .Ev MANPAGER
607: is not defined.
608: If neither PAGER nor MANPAGER is defined,
1.83 schwarze 609: .Xr more 1
610: .Fl s
1.103 schwarze 611: is used.
612: Only used if
613: .Fl a
614: or
615: .Fl l
616: is specified.
1.60 schwarze 617: .El
1.38 schwarze 618: .Sh EXIT STATUS
619: The
620: .Nm
621: utility exits with one of the following values, controlled by the message
622: .Ar level
623: associated with the
624: .Fl W
625: option:
626: .Pp
627: .Bl -tag -width Ds -compact
628: .It 0
1.126 schwarze 629: No base system convention violations, style suggestions, warnings,
630: or errors occurred, or those that did were ignored because they
631: were lower than the requested
1.38 schwarze 632: .Ar level .
1.109 schwarze 633: .It 1
1.126 schwarze 634: At least one base system convention violation or style suggestion
635: occurred, but no warning or error, and
636: .Fl W Cm base
637: or
1.109 schwarze 638: .Fl W Cm style
639: was specified.
1.38 schwarze 640: .It 2
641: At least one warning occurred, but no error, and
1.80 schwarze 642: .Fl W Cm warning
1.126 schwarze 643: or a lower
644: .Ar level
645: was requested.
1.38 schwarze 646: .It 3
1.73 schwarze 647: At least one parsing error occurred,
648: but no unsupported feature was encountered, and
1.80 schwarze 649: .Fl W Cm error
1.109 schwarze 650: or a lower
651: .Ar level
652: was requested.
1.73 schwarze 653: .It 4
1.74 jmc 654: At least one unsupported feature was encountered, and
1.109 schwarze 655: .Fl W Cm unsupp
656: or a lower
657: .Ar level
658: was requested.
1.38 schwarze 659: .It 5
660: Invalid command line arguments were specified.
661: No input files have been read.
662: .It 6
1.71 schwarze 663: An operating system error occurred, for example exhaustion
664: of memory, file descriptors, or process table entries.
1.38 schwarze 665: Such errors cause
666: .Nm
667: to exit at once, possibly in the middle of parsing or formatting a file.
668: .El
669: .Pp
670: Note that selecting
1.80 schwarze 671: .Fl T Cm lint
1.38 schwarze 672: output mode implies
1.126 schwarze 673: .Fl W Cm all .
1.1 kristaps 674: .Sh EXAMPLES
675: To page manuals to the terminal:
676: .Pp
1.111 schwarze 677: .Dl $ mandoc -l mandoc.1 man.1 apropos.1 makewhatis.8
1.12 schwarze 678: .Pp
1.17 schwarze 679: To produce HTML manuals with
1.88 schwarze 680: .Pa mandoc.css
1.17 schwarze 681: as the style-sheet:
682: .Pp
1.88 schwarze 683: .Dl $ mandoc \-T html -O style=mandoc.css mdoc.7 \*(Gt mdoc.7.html
1.17 schwarze 684: .Pp
1.12 schwarze 685: To check over a large set of manuals:
686: .Pp
1.82 bentley 687: .Dl $ mandoc \-T lint \(gafind /usr/src -name \e*\e.[1-9]\(ga
1.34 schwarze 688: .Pp
689: To produce a series of PostScript manuals for A4 paper:
690: .Pp
1.80 schwarze 691: .Dl $ mandoc \-T ps \-O paper=a4 mdoc.7 man.7 \*(Gt manuals.ps
1.46 schwarze 692: .Pp
693: Convert a modern
694: .Xr mdoc 7
695: manual to the older
696: .Xr man 7
697: format, for use on systems lacking an
698: .Xr mdoc 7
699: parser:
700: .Pp
1.80 schwarze 701: .Dl $ mandoc \-T man foo.mdoc \*(Gt foo.man
1.38 schwarze 702: .Sh DIAGNOSTICS
1.59 schwarze 703: Messages displayed by
704: .Nm
705: follow this format:
1.126 schwarze 706: .Bd -ragged -offset indent
1.129 schwarze 707: .Nm :
1.126 schwarze 708: .Ar file : Ns Ar line : Ns Ar column : level : message : macro args
709: .Pq Ar os
710: .Ed
1.38 schwarze 711: .Pp
1.59 schwarze 712: Line and column numbers start at 1.
713: Both are omitted for messages referring to an input file as a whole.
714: Macro names and arguments are omitted where meaningless.
1.126 schwarze 715: The
716: .Ar os
717: operating system specifier is omitted for messages that are relevant
718: for all operating systems.
1.59 schwarze 719: Fatal messages about invalid command line arguments
720: or operating system errors, for example when memory is exhausted,
721: may also omit the
722: .Ar file
1.57 schwarze 723: and
1.59 schwarze 724: .Ar level
725: fields.
1.57 schwarze 726: .Pp
1.38 schwarze 727: Message levels have the following meanings:
728: .Bl -tag -width "warning"
1.73 schwarze 729: .It Cm unsupp
730: An input file uses unsupported low-level
731: .Xr roff 7
732: features.
733: The output may be incomplete and/or misformatted,
734: so using GNU troff instead of
735: .Nm
736: to process the file may be preferable.
1.38 schwarze 737: .It Cm error
1.140 schwarze 738: Indicates a risk of information loss or severe misformatting,
739: in most cases caused by serious syntax errors.
1.38 schwarze 740: .It Cm warning
1.140 schwarze 741: Indicates a risk that the information shown or its formatting
742: may mismatch the author's intent in minor ways.
743: Additionally, syntax errors are classified at least as warnings,
744: even if they do not usually cause misformatting.
1.109 schwarze 745: .It Cm style
746: An input file uses dubious or discouraged style.
747: This is not a complaint about the syntax, and probably neither
748: formatting nor portability are in danger.
749: While great care is taken to avoid false positives on the higher
750: message levels, the
751: .Cm style
752: level tries to reduce the probability that issues go unnoticed,
753: so it may occasionally issue bogus suggestions.
754: Please use your good judgement to decide whether any particular
755: .Cm style
756: suggestion really justifies a change to the input file.
1.126 schwarze 757: .It Cm base
1.143 dcoppa 758: A convention used in the base system of a specific operating system
1.126 schwarze 759: is not adhered to.
760: These are not markup mistakes, and neither the quality of formatting
761: nor portability are in danger.
1.138 schwarze 762: Messages of the
763: .Cm base
764: level are printed with the more intuitive
765: .Cm style
766: .Ar level
767: tag.
1.38 schwarze 768: .El
769: .Pp
770: Messages of the
1.126 schwarze 771: .Cm base ,
1.109 schwarze 772: .Cm style ,
1.73 schwarze 773: .Cm warning ,
774: .Cm error ,
1.38 schwarze 775: and
1.73 schwarze 776: .Cm unsupp
1.71 schwarze 777: levels except those about non-existent or unreadable input files
778: are hidden unless their level, or a lower level, is requested using a
1.38 schwarze 779: .Fl W
780: option or
1.80 schwarze 781: .Fl T Cm lint
1.38 schwarze 782: output mode.
1.126 schwarze 783: .Pp
784: As indicated below, all
785: .Cm base
786: and some
787: .Cm style
788: checks are only performed if a specific operating system name occurs
789: in the arguments of the
790: .Fl W
791: command line option, of the
1.119 schwarze 792: .Ic \&Os
793: macro, of the
794: .Fl Ios
795: command line option, or, if neither are present, in the return value
796: of the
797: .Xr uname 3
798: function.
1.126 schwarze 799: .Ss Conventions for base system manuals
1.113 schwarze 800: .Bl -ohang
1.124 schwarze 801: .It Sy "Mdocdate found"
802: .Pq mdoc , Nx
803: The
804: .Ic \&Dd
805: macro uses CVS
806: .Ic Mdocdate
807: keyword substitution, which is not supported by the
808: .Nx
809: base system.
810: Consider using the conventional
811: .Dq "Month dd, yyyy"
812: format instead.
813: .It Sy "Mdocdate missing"
814: .Pq mdoc , Ox
815: The
816: .Ic \&Dd
817: macro does not use CVS
818: .Ic Mdocdate
819: keyword substitution, but using it is conventionally expected in the
820: .Ox
821: base system.
1.128 schwarze 822: .It Sy "unknown architecture"
823: .Pq mdoc , Ox , Nx
824: The third argument of the
825: .Ic \&Dt
826: macro does not match any of the architectures this operating system
827: is running on.
1.127 schwarze 828: .It Sy "operating system explicitly specified"
829: .Pq mdoc , Ox , Nx
830: The
831: .Ic \&Os
832: macro has an argument.
833: In the base system, it is conventionally left blank.
1.126 schwarze 834: .It Sy "RCS id missing"
835: .Pq Ox , Nx
836: The manual page lacks the comment line with the RCS identifier
837: generated by CVS
838: .Ic OpenBSD
839: or
840: .Ic NetBSD
841: keyword substitution as conventionally used in these operating systems.
1.134 schwarze 842: .It Sy "referenced manual not found"
843: .Pq mdoc
844: An
845: .Ic \&Xr
846: macro references a manual page that is not found in the base system.
847: The path to look for base system manuals is configurable at compile
848: time and defaults to
849: .Pa /usr/share/man : /usr/X11R6/man .
1.126 schwarze 850: .El
851: .Ss Style suggestions
852: .Bl -ohang
1.124 schwarze 853: .It Sy "legacy man(7) date format"
854: .Pq mdoc
855: The
856: .Ic \&Dd
857: macro uses the legacy
858: .Xr man 7
859: date format
860: .Dq yyyy-dd-mm .
861: Consider using the conventional
862: .Xr mdoc 7
863: date format
864: .Dq "Month dd, yyyy"
865: instead.
1.139 schwarze 866: .It Sy "lower case character in document title"
867: .Pq mdoc , man
868: The title is still used as given in the
869: .Ic \&Dt
870: or
871: .Ic \&TH
872: macro.
1.125 schwarze 873: .It Sy "duplicate RCS id"
874: A single manual page contains two copies of the RCS identifier for
875: the same operating system.
876: Consider deleting the later instance and moving the first one up
877: to the top of the page.
1.144 jca 878: .It Sy "possible typo in section name"
1.131 schwarze 879: .Pq mdoc
880: Fuzzy string matching revealed that the argument of an
881: .Ic \&Sh
882: macro is similar, but not identical to a standard section name.
1.139 schwarze 883: .It Sy "unterminated quoted argument"
884: .Pq roff
885: Macro arguments can be enclosed in double quote characters
886: such that space characters and macro names contained in the quoted
887: argument need not be escaped.
888: The closing quote of the last argument of a macro can be omitted.
889: However, omitting it is not recommended because it makes the code
890: harder to read.
1.113 schwarze 891: .It Sy "useless macro"
892: .Pq mdoc
893: A
894: .Ic \&Bt ,
895: .Ic \&Tn ,
896: or
1.114 jmc 897: .Ic \&Ud
1.113 schwarze 898: macro was found.
1.114 jmc 899: Simply delete it: it serves no useful purpose.
1.115 schwarze 900: .It Sy "consider using OS macro"
901: .Pq mdoc
902: A string was found in plain text or in a
903: .Ic \&Bx
904: macro that could be represented using
905: .Ic \&Ox ,
906: .Ic \&Nx ,
907: .Ic \&Fx ,
908: or
909: .Ic \&Dx .
1.119 schwarze 910: .It Sy "errnos out of order"
911: .Pq mdoc, Nx
912: The
913: .Ic \&Er
914: items in a
915: .Ic \&Bl
916: list are not in alphabetical order.
917: .It Sy "duplicate errno"
918: .Pq mdoc, Nx
919: A
920: .Ic \&Bl
921: list contains two consecutive
922: .Ic \&It
923: entries describing the same
924: .Ic \&Er
925: number.
1.137 schwarze 926: .It Sy "trailing delimiter"
1.116 schwarze 927: .Pq mdoc
1.137 schwarze 928: The last argument of an
929: .Ic \&Ex , \&Fo , \&Nd , \&Nm , \&Os , \&Sh , \&Ss , \&St ,
930: or
931: .Ic \&Sx
932: macro ends with a trailing delimiter.
933: This is usually bad style and often indicates typos.
934: Most likely, the delimiter can be removed.
1.121 schwarze 935: .It Sy "no blank before trailing delimiter"
1.122 schwarze 936: .Pq mdoc
1.121 schwarze 937: The last argument of a macro that supports trailing delimiter
938: arguments is longer than one byte and ends with a trailing delimiter.
939: Consider inserting a blank such that the delimiter becomes a separate
940: argument, thus moving it out of the scope of the macro.
1.139 schwarze 941: .It Sy "fill mode already enabled, skipping"
942: .Pq man
943: A
944: .Ic \&fi
945: request occurs even though the document is still in fill mode,
946: or already switched back to fill mode.
947: It has no effect.
948: .It Sy "fill mode already disabled, skipping"
949: .Pq man
950: An
951: .Ic \&nf
952: request occurs even though the document already switched to no-fill mode
953: and did not switch back to fill mode yet.
954: It has no effect.
1.146 ! schwarze 955: .It Sy "verbatim \(dq--\(dq, maybe consider using \e(em"
! 956: .Pq mdoc
! 957: Even though the ASCII output device renders an em-dash as
! 958: .Qq \-\- ,
! 959: that is not a good way to write it in an input file
! 960: because it renders poorly on all other output devices.
1.122 schwarze 961: .It Sy "function name without markup"
962: .Pq mdoc
963: A word followed by an empty pair of parentheses occurs on a text line.
964: Consider using an
965: .Ic \&Fn
966: or
967: .Ic \&Xr
968: macro.
1.139 schwarze 969: .It Sy "whitespace at end of input line"
970: .Pq mdoc , man , roff
971: Whitespace at the end of input lines is almost never semantically
972: significant \(em but in the odd case where it might be, it is
973: extremely confusing when reviewing and maintaining documents.
974: .It Sy "bad comment style"
975: .Pq roff
976: Comment lines start with a dot, a backslash, and a double-quote character.
977: The
978: .Nm
979: utility treats the line as a comment line even without the backslash,
980: but leaving out the backslash might not be portable.
1.113 schwarze 981: .El
1.76 schwarze 982: .Ss Warnings related to the document prologue
983: .Bl -ohang
984: .It Sy "missing manual title, using UNTITLED"
985: .Pq mdoc
986: A
987: .Ic \&Dt
988: macro has no arguments, or there is no
989: .Ic \&Dt
990: macro before the first non-prologue macro.
991: .It Sy "missing manual title, using \(dq\(dq"
992: .Pq man
993: There is no
994: .Ic \&TH
995: macro, or it has no arguments.
996: .It Sy "missing manual section, using \(dq\(dq"
997: .Pq mdoc , man
998: A
999: .Ic \&Dt
1000: or
1001: .Ic \&TH
1002: macro lacks the mandatory section argument.
1003: .It Sy "unknown manual section"
1004: .Pq mdoc
1005: The section number in a
1006: .Ic \&Dt
1007: line is invalid, but still used.
1008: .It Sy "missing date, using today's date"
1009: .Pq mdoc, man
1010: The document was parsed as
1011: .Xr mdoc 7
1012: and it has no
1013: .Ic \&Dd
1014: macro, or the
1015: .Ic \&Dd
1016: macro has no arguments or only empty arguments;
1017: or the document was parsed as
1018: .Xr man 7
1019: and it has no
1020: .Ic \&TH
1021: macro, or the
1022: .Ic \&TH
1023: macro has less than three arguments or its third argument is empty.
1024: .It Sy "cannot parse date, using it verbatim"
1025: .Pq mdoc , man
1026: The date given in a
1027: .Ic \&Dd
1028: or
1029: .Ic \&TH
1030: macro does not follow the conventional format.
1.136 schwarze 1031: .It Sy "date in the future, using it anyway"
1032: .Pq mdoc , man
1033: The date given in a
1034: .Ic \&Dd
1035: or
1036: .Ic \&TH
1037: macro is more than a day ahead of the current system
1038: .Xr time 3 .
1.76 schwarze 1039: .It Sy "missing Os macro, using \(dq\(dq"
1040: .Pq mdoc
1041: The default or current system is not shown in this case.
1042: .It Sy "late prologue macro"
1043: .Pq mdoc
1044: A
1045: .Ic \&Dd
1046: or
1047: .Ic \&Os
1048: macro occurs after some non-prologue macro, but still takes effect.
1049: .It Sy "prologue macros out of order"
1050: .Pq mdoc
1051: The prologue macros are not given in the conventional order
1052: .Ic \&Dd ,
1053: .Ic \&Dt ,
1054: .Ic \&Os .
1055: All three macros are used even when given in another order.
1056: .El
1057: .Ss Warnings regarding document structure
1058: .Bl -ohang
1059: .It Sy ".so is fragile, better use ln(1)"
1060: .Pq roff
1061: Including files only works when the parser program runs with the correct
1062: current working directory.
1063: .It Sy "no document body"
1064: .Pq mdoc , man
1065: The document body contains neither text nor macros.
1066: An empty document is shown, consisting only of a header and a footer line.
1067: .It Sy "content before first section header"
1068: .Pq mdoc , man
1069: Some macros or text precede the first
1070: .Ic \&Sh
1071: or
1072: .Ic \&SH
1073: section header.
1074: The offending macros and text are parsed and added to the top level
1075: of the syntax tree, outside any section block.
1076: .It Sy "first section is not NAME"
1077: .Pq mdoc
1078: The argument of the first
1079: .Ic \&Sh
1080: macro is not
1081: .Sq NAME .
1082: This may confuse
1083: .Xr makewhatis 8
1084: and
1085: .Xr apropos 1 .
1.92 schwarze 1086: .It Sy "NAME section without Nm before Nd"
1.76 schwarze 1087: .Pq mdoc
1.79 schwarze 1088: The NAME section does not contain any
1089: .Ic \&Nm
1.92 schwarze 1090: child macro before the first
1091: .Ic \&Nd
1092: macro.
1.79 schwarze 1093: .It Sy "NAME section without description"
1094: .Pq mdoc
1095: The NAME section lacks the mandatory
1096: .Ic \&Nd
1097: child macro.
1098: .It Sy "description not at the end of NAME"
1099: .Pq mdoc
1100: The NAME section does contain an
1.76 schwarze 1101: .Ic \&Nd
1.79 schwarze 1102: child macro, but other content follows it.
1103: .It Sy "bad NAME section content"
1104: .Pq mdoc
1105: The NAME section contains plain text or macros other than
1106: .Ic \&Nm
1.76 schwarze 1107: and
1.79 schwarze 1108: .Ic \&Nd .
1.92 schwarze 1109: .It Sy "missing comma before name"
1110: .Pq mdoc
1111: The NAME section contains an
1112: .Ic \&Nm
1113: macro that is neither the first one nor preceded by a comma.
1.76 schwarze 1114: .It Sy "missing description line, using \(dq\(dq"
1115: .Pq mdoc
1116: The
1117: .Ic \&Nd
1118: macro lacks the required argument.
1119: The title line of the manual will end after the dash.
1.101 schwarze 1120: .It Sy "description line outside NAME section"
1121: .Pq mdoc
1122: An
1123: .Ic \&Nd
1124: macro appears outside the NAME section.
1125: The arguments are printed anyway and the following text is used for
1126: .Xr apropos 1 ,
1127: but none of that behaviour is portable.
1.76 schwarze 1128: .It Sy "sections out of conventional order"
1129: .Pq mdoc
1130: A standard section occurs after another section it usually precedes.
1131: All section titles are used as given,
1132: and the order of sections is not changed.
1133: .It Sy "duplicate section title"
1134: .Pq mdoc
1135: The same standard section title occurs more than once.
1136: .It Sy "unexpected section"
1137: .Pq mdoc
1138: A standard section header occurs in a section of the manual
1139: where it normally isn't useful.
1.135 schwarze 1140: .It Sy "cross reference to self"
1141: .Pq mdoc
1142: An
1143: .Ic \&Xr
1144: macro refers to a name and section matching the section of the present
1145: manual page and a name mentioned in an
1146: .Ic \&Nm
1147: macro in the NAME or SYNOPSIS section, or in an
1148: .Ic \&Fn
1149: or
1150: .Ic \&Fo
1151: macro in the SYNOPSIS.
1152: Consider using
1153: .Ic \&Nm
1154: or
1155: .Ic \&Fn
1156: instead of
1157: .Ic \&Xr .
1.76 schwarze 1158: .It Sy "unusual Xr order"
1159: .Pq mdoc
1160: In the SEE ALSO section, an
1161: .Ic \&Xr
1162: macro with a lower section number follows one with a higher number,
1163: or two
1164: .Ic \&Xr
1.81 jmc 1165: macros referring to the same section are out of alphabetical order.
1.76 schwarze 1166: .It Sy "unusual Xr punctuation"
1167: .Pq mdoc
1168: In the SEE ALSO section, punctuation between two
1169: .Ic \&Xr
1170: macros differs from a single comma, or there is trailing punctuation
1171: after the last
1172: .Ic \&Xr
1173: macro.
1174: .It Sy "AUTHORS section without An macro"
1175: .Pq mdoc
1176: An AUTHORS sections contains no
1177: .Ic \&An
1178: macros, or only empty ones.
1179: Probably, there are author names lacking markup.
1180: .El
1181: .Ss "Warnings related to macros and nesting"
1182: .Bl -ohang
1183: .It Sy "obsolete macro"
1184: .Pq mdoc
1185: See the
1186: .Xr mdoc 7
1187: manual for replacements.
1188: .It Sy "macro neither callable nor escaped"
1189: .Pq mdoc
1190: The name of a macro that is not callable appears on a macro line.
1191: It is printed verbatim.
1192: If the intention is to call it, move it to its own input line;
1193: otherwise, escape it by prepending
1194: .Sq \e& .
1195: .It Sy "skipping paragraph macro"
1196: In
1197: .Xr mdoc 7
1198: documents, this happens
1199: .Bl -dash -compact
1200: .It
1201: at the beginning and end of sections and subsections
1202: .It
1203: right before non-compact lists and displays
1204: .It
1205: at the end of items in non-column, non-compact lists
1206: .It
1207: and for multiple consecutive paragraph macros.
1208: .El
1209: In
1210: .Xr man 7
1211: documents, it happens
1212: .Bl -dash -compact
1213: .It
1214: for empty
1215: .Ic \&P ,
1216: .Ic \&PP ,
1217: and
1218: .Ic \&LP
1219: macros
1220: .It
1221: for
1222: .Ic \&IP
1223: macros having neither head nor body arguments
1224: .It
1225: for
1226: .Ic \&br
1227: or
1228: .Ic \&sp
1229: right after
1230: .Ic \&SH
1231: or
1232: .Ic \&SS
1233: .El
1234: .It Sy "moving paragraph macro out of list"
1235: .Pq mdoc
1236: A list item in a
1237: .Ic \&Bl
1238: list contains a trailing paragraph macro.
1239: The paragraph macro is moved after the end of the list.
1240: .It Sy "skipping no-space macro"
1241: .Pq mdoc
1242: An input line begins with an
1243: .Ic \&Ns
1.132 schwarze 1244: macro, or the next argument after an
1245: .Ic \&Ns
1246: macro is an isolated closing delimiter.
1.76 schwarze 1247: The macro is ignored.
1248: .It Sy "blocks badly nested"
1249: .Pq mdoc
1250: If two blocks intersect, one should completely contain the other.
1251: Otherwise, rendered output is likely to look strange in any output
1252: format, and rendering in SGML-based output formats is likely to be
1253: outright wrong because such languages do not support badly nested
1254: blocks at all.
1255: Typical examples of badly nested blocks are
1256: .Qq Ic \&Ao \&Bo \&Ac \&Bc
1257: and
1258: .Qq Ic \&Ao \&Bq \&Ac .
1259: In these examples,
1260: .Ic \&Ac
1261: breaks
1262: .Ic \&Bo
1263: and
1264: .Ic \&Bq ,
1265: respectively.
1266: .It Sy "nested displays are not portable"
1267: .Pq mdoc
1268: A
1269: .Ic \&Bd ,
1270: .Ic \&D1 ,
1271: or
1272: .Ic \&Dl
1273: display occurs nested inside another
1274: .Ic \&Bd
1275: display.
1276: This works with
1277: .Nm ,
1278: but fails with most other implementations.
1279: .It Sy "moving content out of list"
1280: .Pq mdoc
1281: A
1282: .Ic \&Bl
1283: list block contains text or macros before the first
1284: .Ic \&It
1285: macro.
1286: The offending children are moved before the beginning of the list.
1.133 schwarze 1287: .It Sy "first macro on line"
1288: Inside a
1289: .Ic \&Bl Fl column
1290: list, a
1291: .Ic \&Ta
1292: macro occurs as the first macro on a line, which is not portable.
1.76 schwarze 1293: .It Sy "line scope broken"
1294: .Pq man
1295: While parsing the next-line scope of the previous macro,
1296: another macro is found that prematurely terminates the previous one.
1297: The previous, interrupted macro is deleted from the parse tree.
1298: .El
1299: .Ss "Warnings related to missing arguments"
1300: .Bl -ohang
1301: .It Sy "skipping empty request"
1302: .Pq roff , eqn
1303: The macro name is missing from a macro definition request,
1304: or an
1305: .Xr eqn 7
1306: control statement or operation keyword lacks its required argument.
1307: .It Sy "conditional request controls empty scope"
1308: .Pq roff
1309: A conditional request is only useful if any of the following
1310: follows it on the same logical input line:
1311: .Bl -dash -compact
1312: .It
1313: The
1314: .Sq \e{
1315: keyword to open a multi-line scope.
1316: .It
1317: A request or macro or some text, resulting in a single-line scope.
1318: .It
1319: The immediate end of the logical line without any intervening whitespace,
1320: resulting in next-line scope.
1321: .El
1322: Here, a conditional request is followed by trailing whitespace only,
1323: and there is no other content on its logical input line.
1324: Note that it doesn't matter whether the logical input line is split
1325: across multiple physical input lines using
1326: .Sq \e
1327: line continuation characters.
1328: This is one of the rare cases
1329: where trailing whitespace is syntactically significant.
1330: The conditional request controls a scope containing whitespace only,
1331: so it is unlikely to have a significant effect,
1332: except that it may control a following
1333: .Ic \&el
1334: clause.
1335: .It Sy "skipping empty macro"
1336: .Pq mdoc
1337: The indicated macro has no arguments and hence no effect.
1338: .It Sy "empty block"
1339: .Pq mdoc , man
1340: A
1341: .Ic \&Bd ,
1342: .Ic \&Bk ,
1343: .Ic \&Bl ,
1344: .Ic \&D1 ,
1345: .Ic \&Dl ,
1.130 bentley 1346: .Ic \&MT ,
1.76 schwarze 1347: .Ic \&RS ,
1348: or
1349: .Ic \&UR
1350: block contains nothing in its body and will produce no output.
1351: .It Sy "empty argument, using 0n"
1352: .Pq mdoc
1353: The required width is missing after
1354: .Ic \&Bd
1355: or
1356: .Ic \&Bl
1357: .Fl offset
1358: or
1.110 jmc 1359: .Fl width .
1.76 schwarze 1360: .It Sy "missing display type, using -ragged"
1361: .Pq mdoc
1362: The
1363: .Ic \&Bd
1364: macro is invoked without the required display type.
1365: .It Sy "list type is not the first argument"
1366: .Pq mdoc
1367: In a
1368: .Ic \&Bl
1369: macro, at least one other argument precedes the type argument.
1370: The
1371: .Nm
1372: utility copes with any argument order, but some other
1373: .Xr mdoc 7
1374: implementations do not.
1375: .It Sy "missing -width in -tag list, using 8n"
1376: .Pq mdoc
1377: Every
1378: .Ic \&Bl
1379: macro having the
1380: .Fl tag
1381: argument requires
1382: .Fl width ,
1383: too.
1384: .It Sy "missing utility name, using \(dq\(dq"
1385: .Pq mdoc
1386: The
1387: .Ic \&Ex Fl std
1388: macro is called without an argument before
1389: .Ic \&Nm
1390: has first been called with an argument.
1391: .It Sy "missing function name, using \(dq\(dq"
1392: .Pq mdoc
1393: The
1394: .Ic \&Fo
1395: macro is called without an argument.
1396: No function name is printed.
1397: .It Sy "empty head in list item"
1398: .Pq mdoc
1399: In a
1400: .Ic \&Bl
1401: .Fl diag ,
1402: .Fl hang ,
1403: .Fl inset ,
1404: .Fl ohang ,
1405: or
1406: .Fl tag
1407: list, an
1408: .Ic \&It
1409: macro lacks the required argument.
1410: The item head is left empty.
1411: .It Sy "empty list item"
1412: .Pq mdoc
1413: In a
1414: .Ic \&Bl
1415: .Fl bullet ,
1416: .Fl dash ,
1417: .Fl enum ,
1418: or
1419: .Fl hyphen
1420: list, an
1421: .Ic \&It
1422: block is empty.
1423: An empty list item is shown.
1.133 schwarze 1424: .It Sy "missing argument, using next line"
1425: .Pq mdoc
1426: An
1427: .Ic \&It
1428: macro in a
1429: .Ic \&Bd Fl column
1430: list has no arguments.
1431: While
1432: .Nm
1433: uses the text or macros of the following line, if any, for the cell,
1434: other formatters may misformat the list.
1.76 schwarze 1435: .It Sy "missing font type, using \efR"
1436: .Pq mdoc
1437: A
1438: .Ic \&Bf
1439: macro has no argument.
1440: It switches to the default font.
1441: .It Sy "unknown font type, using \efR"
1442: .Pq mdoc
1443: The
1444: .Ic \&Bf
1445: argument is invalid.
1446: The default font is used instead.
1447: .It Sy "nothing follows prefix"
1448: .Pq mdoc
1449: A
1450: .Ic \&Pf
1451: macro has no argument, or only one argument and no macro follows
1452: on the same input line.
1453: This defeats its purpose; in particular, spacing is not suppressed
1454: before the text or macros following on the next input line.
1455: .It Sy "empty reference block"
1456: .Pq mdoc
1457: An
1458: .Ic \&Rs
1459: macro is immediately followed by an
1460: .Ic \&Re
1461: macro on the next input line.
1462: Such an empty block does not produce any output.
1.89 schwarze 1463: .It Sy "missing section argument"
1464: .Pq mdoc
1465: An
1466: .Ic \&Xr
1467: macro lacks its second, section number argument.
1468: The first argument, i.e. the name, is printed, but without subsequent
1.90 jmc 1469: parentheses.
1.76 schwarze 1470: .It Sy "missing -std argument, adding it"
1471: .Pq mdoc
1472: An
1473: .Ic \&Ex
1474: or
1475: .Ic \&Rv
1476: macro lacks the required
1477: .Fl std
1478: argument.
1479: The
1480: .Nm
1481: utility assumes
1482: .Fl std
1483: even when it is not specified, but other implementations may not.
1484: .It Sy "missing option string, using \(dq\(dq"
1485: .Pq man
1486: The
1487: .Ic \&OP
1488: macro is invoked without any argument.
1489: An empty pair of square brackets is shown.
1490: .It Sy "missing resource identifier, using \(dq\(dq"
1491: .Pq man
1492: The
1.130 bentley 1493: .Ic \&MT
1494: or
1.76 schwarze 1495: .Ic \&UR
1496: macro is invoked without any argument.
1497: An empty pair of angle brackets is shown.
1498: .It Sy "missing eqn box, using \(dq\(dq"
1499: .Pq eqn
1500: A diacritic mark or a binary operator is found,
1501: but there is nothing to the left of it.
1502: An empty box is inserted.
1503: .El
1504: .Ss "Warnings related to bad macro arguments"
1505: .Bl -ohang
1506: .It Sy "duplicate argument"
1507: .Pq mdoc
1508: A
1509: .Ic \&Bd
1510: or
1511: .Ic \&Bl
1512: macro has more than one
1513: .Fl compact ,
1514: more than one
1515: .Fl offset ,
1516: or more than one
1517: .Fl width
1518: argument.
1519: All but the last instances of these arguments are ignored.
1520: .It Sy "skipping duplicate argument"
1521: .Pq mdoc
1522: An
1523: .Ic \&An
1524: macro has more than one
1525: .Fl split
1526: or
1527: .Fl nosplit
1528: argument.
1529: All but the first of these arguments are ignored.
1530: .It Sy "skipping duplicate display type"
1531: .Pq mdoc
1532: A
1533: .Ic \&Bd
1534: macro has more than one type argument; the first one is used.
1535: .It Sy "skipping duplicate list type"
1536: .Pq mdoc
1537: A
1538: .Ic \&Bl
1539: macro has more than one type argument; the first one is used.
1540: .It Sy "skipping -width argument"
1541: .Pq mdoc
1542: A
1543: .Ic \&Bl
1544: .Fl column ,
1545: .Fl diag ,
1546: .Fl ohang ,
1547: .Fl inset ,
1548: or
1549: .Fl item
1550: list has a
1551: .Fl width
1552: argument.
1553: That has no effect.
1554: .It Sy "wrong number of cells"
1555: In a line of a
1556: .Ic \&Bl Fl column
1557: list, the number of tabs or
1558: .Ic \&Ta
1559: macros is less than the number expected from the list header line
1560: or exceeds the expected number by more than one.
1561: Missing cells remain empty, and all cells exceeding the number of
1562: columns are joined into one single cell.
1563: .It Sy "unknown AT&T UNIX version"
1564: .Pq mdoc
1565: An
1566: .Ic \&At
1567: macro has an invalid argument.
1568: It is used verbatim, with
1569: .Qq "AT&T UNIX "
1570: prefixed to it.
1571: .It Sy "comma in function argument"
1572: .Pq mdoc
1573: An argument of an
1574: .Ic \&Fa
1575: or
1576: .Ic \&Fn
1577: macro contains a comma; it should probably be split into two arguments.
1578: .It Sy "parenthesis in function name"
1579: .Pq mdoc
1580: The first argument of an
1581: .Ic \&Fc
1582: or
1583: .Ic \&Fn
1584: macro contains an opening or closing parenthesis; that's probably wrong,
1585: parentheses are added automatically.
1.120 schwarze 1586: .It Sy "unknown library name"
1587: .Pq mdoc, not on Ox
1588: An
1589: .Ic \&Lb
1590: macro has an unknown name argument and will be rendered as
1591: .Qq library Dq Ar name .
1.76 schwarze 1592: .It Sy "invalid content in Rs block"
1593: .Pq mdoc
1594: An
1595: .Ic \&Rs
1596: block contains plain text or non-% macros.
1597: The bogus content is left in the syntax tree.
1598: Formatting may be poor.
1599: .It Sy "invalid Boolean argument"
1600: .Pq mdoc
1601: An
1602: .Ic \&Sm
1603: macro has an argument other than
1604: .Cm on
1605: or
1606: .Cm off .
1607: The invalid argument is moved out of the macro, which leaves the macro
1608: empty, causing it to toggle the spacing mode.
1609: .It Sy "unknown font, skipping request"
1610: .Pq man , tbl
1611: A
1612: .Xr roff 7
1613: .Ic \&ft
1614: request or a
1615: .Xr tbl 7
1616: .Ic \&f
1617: layout modifier has an unknown
1618: .Ar font
1619: argument.
1620: .It Sy "odd number of characters in request"
1621: .Pq roff
1622: A
1623: .Ic \&tr
1624: request contains an odd number of characters.
1625: The last character is mapped to the blank character.
1626: .El
1627: .Ss "Warnings related to plain text"
1628: .Bl -ohang
1629: .It Sy "blank line in fill mode, using .sp"
1630: .Pq mdoc
1631: The meaning of blank input lines is only well-defined in non-fill mode:
1632: In fill mode, line breaks of text input lines are not supposed to be
1633: significant.
1634: However, for compatibility with groff, blank lines in fill mode
1635: are replaced with
1636: .Ic \&sp
1637: requests.
1638: .It Sy "tab in filled text"
1639: .Pq mdoc , man
1640: The meaning of tab characters is only well-defined in non-fill mode:
1641: In fill mode, whitespace is not supposed to be significant
1642: on text input lines.
1643: As an implementation dependent choice, tab characters on text lines
1644: are passed through to the formatters in any case.
1645: Given that the text before the tab character will be filled,
1646: it is hard to predict which tab stop position the tab will advance to.
1.96 schwarze 1647: .It Sy "new sentence, new line"
1648: .Pq mdoc
1649: A new sentence starts in the middle of a text line.
1650: Start it on a new input line to help formatters produce correct spacing.
1.76 schwarze 1651: .It Sy "invalid escape sequence"
1652: .Pq roff
1653: An escape sequence has an invalid opening argument delimiter, lacks the
1654: closing argument delimiter, or the argument has too few characters.
1655: If the argument is incomplete,
1656: .Ic \e*
1657: and
1658: .Ic \en
1659: expand to an empty string,
1660: .Ic \eB
1661: to the digit
1662: .Sq 0 ,
1663: and
1664: .Ic \ew
1665: to the length of the incomplete argument.
1666: All other invalid escape sequences are ignored.
1667: .It Sy "undefined string, using \(dq\(dq"
1668: .Pq roff
1669: If a string is used without being defined before,
1670: its value is implicitly set to the empty string.
1671: However, defining strings explicitly before use
1672: keeps the code more readable.
1673: .El
1674: .Ss "Warnings related to tables"
1675: .Bl -ohang
1676: .It Sy "tbl line starts with span"
1677: .Pq tbl
1678: The first cell in a table layout line is a horizontal span
1679: .Pq Sq Cm s .
1680: Data provided for this cell is ignored, and nothing is printed in the cell.
1681: .It Sy "tbl column starts with span"
1682: .Pq tbl
1683: The first line of a table layout specification
1684: requests a vertical span
1685: .Pq Sq Cm ^ .
1686: Data provided for this cell is ignored, and nothing is printed in the cell.
1687: .It Sy "skipping vertical bar in tbl layout"
1688: .Pq tbl
1689: A table layout specification contains more than two consecutive vertical bars.
1690: A double bar is printed, all additional bars are discarded.
1691: .El
1692: .Ss "Errors related to tables"
1693: .Bl -ohang
1694: .It Sy "non-alphabetic character in tbl options"
1695: .Pq tbl
1696: The table options line contains a character other than a letter,
1697: blank, or comma where the beginning of an option name is expected.
1698: The character is ignored.
1699: .It Sy "skipping unknown tbl option"
1700: .Pq tbl
1701: The table options line contains a string of letters that does not
1702: match any known option name.
1703: The word is ignored.
1704: .It Sy "missing tbl option argument"
1705: .Pq tbl
1706: A table option that requires an argument is not followed by an
1707: opening parenthesis, or the opening parenthesis is immediately
1708: followed by a closing parenthesis.
1709: The option is ignored.
1710: .It Sy "wrong tbl option argument size"
1711: .Pq tbl
1712: A table option argument contains an invalid number of characters.
1713: Both the option and the argument are ignored.
1714: .It Sy "empty tbl layout"
1715: .Pq tbl
1716: A table layout specification is completely empty,
1717: specifying zero lines and zero columns.
1718: As a fallback, a single left-justified column is used.
1719: .It Sy "invalid character in tbl layout"
1720: .Pq tbl
1721: A table layout specification contains a character that can neither
1722: be interpreted as a layout key character nor as a layout modifier,
1723: or a modifier precedes the first key.
1724: The invalid character is discarded.
1725: .It Sy "unmatched parenthesis in tbl layout"
1726: .Pq tbl
1727: A table layout specification contains an opening parenthesis,
1728: but no matching closing parenthesis.
1729: The rest of the input line, starting from the parenthesis, has no effect.
1730: .It Sy "tbl without any data cells"
1731: .Pq tbl
1732: A table does not contain any data cells.
1733: It will probably produce no output.
1734: .It Sy "ignoring data in spanned tbl cell"
1735: .Pq tbl
1736: A table cell is marked as a horizontal span
1737: .Pq Sq Cm s
1738: or vertical span
1739: .Pq Sq Cm ^
1740: in the table layout, but it contains data.
1741: The data is ignored.
1742: .It Sy "ignoring extra tbl data cells"
1743: .Pq tbl
1744: A data line contains more cells than the corresponding layout line.
1745: The data in the extra cells is ignored.
1746: .It Sy "data block open at end of tbl"
1747: .Pq tbl
1748: A data block is opened with
1749: .Cm T{ ,
1750: but never closed with a matching
1751: .Cm T} .
1752: The remaining data lines of the table are all put into one cell,
1753: and any remaining cells stay empty.
1754: .El
1755: .Ss "Errors related to roff, mdoc, and man code"
1756: .Bl -ohang
1.139 schwarze 1757: .It Sy "duplicate prologue macro"
1758: .Pq mdoc
1759: One of the prologue macros occurs more than once.
1760: The last instance overrides all previous ones.
1761: .It Sy "skipping late title macro"
1762: .Pq mdoc
1763: The
1764: .Ic \&Dt
1765: macro appears after the first non-prologue macro.
1766: Traditional formatters cannot handle this because
1767: they write the page header before parsing the document body.
1768: Even though this technical restriction does not apply to
1769: .Nm ,
1770: traditional semantics is preserved.
1771: The late macro is discarded including its arguments.
1.76 schwarze 1772: .It Sy "input stack limit exceeded, infinite loop?"
1773: .Pq roff
1774: Explicit recursion limits are implemented for the following features,
1775: in order to prevent infinite loops:
1776: .Bl -dash -compact
1777: .It
1778: expansion of nested escape sequences
1779: including expansion of strings and number registers,
1780: .It
1781: expansion of nested user-defined macros,
1782: .It
1783: and
1784: .Ic \&so
1785: file inclusion.
1786: .El
1787: When a limit is hit, the output is incorrect, typically losing
1788: some content, but the parser can continue.
1789: .It Sy "skipping bad character"
1790: .Pq mdoc , man , roff
1791: The input file contains a byte that is not a printable
1792: .Xr ascii 7
1793: character.
1794: The message mentions the character number.
1795: The offending byte is replaced with a question mark
1796: .Pq Sq \&? .
1797: Consider editing the input file to replace the byte with an ASCII
1798: transliteration of the intended character.
1799: .It Sy "skipping unknown macro"
1800: .Pq mdoc , man , roff
1801: The first identifier on a request or macro line is neither recognized as a
1802: .Xr roff 7
1803: request, nor as a user-defined macro, nor, respectively, as an
1804: .Xr mdoc 7
1805: or
1806: .Xr man 7
1807: macro.
1808: It may be mistyped or unsupported.
1809: The request or macro is discarded including its arguments.
1810: .It Sy "skipping insecure request"
1811: .Pq roff
1812: An input file attempted to run a shell command
1813: or to read or write an external file.
1814: Such attempts are denied for security reasons.
1815: .It Sy "skipping item outside list"
1816: .Pq mdoc , eqn
1817: An
1818: .Ic \&It
1819: macro occurs outside any
1820: .Ic \&Bl
1821: list, or an
1822: .Xr eqn 7
1823: .Ic above
1824: delimiter occurs outside any pile.
1825: It is discarded including its arguments.
1826: .It Sy "skipping column outside column list"
1827: .Pq mdoc
1828: A
1829: .Ic \&Ta
1830: macro occurs outside any
1831: .Ic \&Bl Fl column
1832: block.
1833: It is discarded including its arguments.
1834: .It Sy "skipping end of block that is not open"
1835: .Pq mdoc , man , eqn , tbl , roff
1836: Various syntax elements can only be used to explicitly close blocks
1837: that have previously been opened.
1838: An
1839: .Xr mdoc 7
1840: block closing macro, a
1841: .Xr man 7
1.130 bentley 1842: .Ic \&ME , \&RE
1.76 schwarze 1843: or
1844: .Ic \&UE
1845: macro, an
1846: .Xr eqn 7
1847: right delimiter or closing brace, or the end of an equation, table, or
1848: .Xr roff 7
1849: conditional request is encountered but no matching block is open.
1850: The offending request or macro is discarded.
1851: .It Sy "fewer RS blocks open, skipping"
1852: .Pq man
1853: The
1854: .Ic \&RE
1855: macro is invoked with an argument, but less than the specified number of
1856: .Ic \&RS
1857: blocks is open.
1858: The
1859: .Ic \&RE
1860: macro is discarded.
1861: .It Sy "inserting missing end of block"
1862: .Pq mdoc , tbl
1863: Various
1864: .Xr mdoc 7
1865: macros as well as tables require explicit closing by dedicated macros.
1866: A block that doesn't support bad nesting
1867: ends before all of its children are properly closed.
1868: The open child nodes are closed implicitly.
1869: .It Sy "appending missing end of block"
1870: .Pq mdoc , man , eqn , tbl , roff
1871: At the end of the document, an explicit
1872: .Xr mdoc 7
1873: block, a
1874: .Xr man 7
1875: next-line scope or
1.130 bentley 1876: .Ic \&MT , \&RS
1.76 schwarze 1877: or
1878: .Ic \&UR
1879: block, an equation, table, or
1880: .Xr roff 7
1881: conditional or ignore block is still open.
1882: The open block is closed implicitly.
1883: .It Sy "escaped character not allowed in a name"
1884: .Pq roff
1885: Macro, string and register identifiers consist of printable,
1886: non-whitespace ASCII characters.
1887: Escape sequences and characters and strings expressed in terms of them
1888: cannot form part of a name.
1889: The first argument of an
1890: .Ic \&am ,
1891: .Ic \&as ,
1892: .Ic \&de ,
1893: .Ic \&ds ,
1894: .Ic \&nr ,
1895: or
1896: .Ic \&rr
1897: request, or any argument of an
1898: .Ic \&rm
1899: request, or the name of a request or user defined macro being called,
1900: is terminated by an escape sequence.
1901: In the cases of
1902: .Ic \&as ,
1903: .Ic \&ds ,
1904: and
1905: .Ic \&nr ,
1906: the request has no effect at all.
1907: In the cases of
1908: .Ic \&am ,
1909: .Ic \&de ,
1910: .Ic \&rr ,
1911: and
1912: .Ic \&rm ,
1913: what was parsed up to this point is used as the arguments to the request,
1914: and the rest of the input line is discarded including the escape sequence.
1915: When parsing for a request or a user-defined macro name to be called,
1916: only the escape sequence is discarded.
1917: The characters preceding it are used as the request or macro name,
1918: the characters following it are used as the arguments to the request or macro.
1919: .It Sy "NOT IMPLEMENTED: Bd -file"
1920: .Pq mdoc
1921: For security reasons, the
1922: .Ic \&Bd
1923: macro does not support the
1924: .Fl file
1925: argument.
1926: By requesting the inclusion of a sensitive file, a malicious document
1927: might otherwise trick a privileged user into inadvertently displaying
1928: the file on the screen, revealing the file content to bystanders.
1929: The argument is ignored including the file name following it.
1.87 schwarze 1930: .It Sy "skipping display without arguments"
1931: .Pq mdoc
1932: A
1933: .Ic \&Bd
1934: block macro does not have any arguments.
1935: The block is discarded, and the block content is displayed in
1936: whatever mode was active before the block.
1.76 schwarze 1937: .It Sy "missing list type, using -item"
1938: .Pq mdoc
1939: A
1940: .Ic \&Bl
1941: macro fails to specify the list type.
1.118 schwarze 1942: .It Sy "argument is not numeric, using 1"
1943: .Pq roff
1944: The argument of a
1945: .Ic \&ce
1946: request is not a number.
1.76 schwarze 1947: .It Sy "missing manual name, using \(dq\(dq"
1948: .Pq mdoc
1949: The first call to
1.92 schwarze 1950: .Ic \&Nm ,
1951: or any call in the NAME section, lacks the required argument.
1.76 schwarze 1952: .It Sy "uname(3) system call failed, using UNKNOWN"
1953: .Pq mdoc
1954: The
1955: .Ic \&Os
1956: macro is called without arguments, and the
1957: .Xr uname 3
1958: system call failed.
1959: As a workaround,
1960: .Nm
1961: can be compiled with
1962: .Sm off
1963: .Fl D Cm OSNAME=\(dq\e\(dq Ar string Cm \e\(dq\(dq .
1964: .Sm on
1965: .It Sy "unknown standard specifier"
1966: .Pq mdoc
1967: An
1968: .Ic \&St
1969: macro has an unknown argument and is discarded.
1970: .It Sy "skipping request without numeric argument"
1971: .Pq roff , eqn
1972: An
1973: .Ic \&it
1974: request or an
1975: .Xr eqn 7
1976: .Ic \&size
1977: or
1978: .Ic \&gsize
1979: statement has a non-numeric or negative argument or no argument at all.
1980: The invalid request or statement is ignored.
1981: .It Sy "NOT IMPLEMENTED: .so with absolute path or \(dq..\(dq"
1982: .Pq roff
1983: For security reasons,
1984: .Nm
1985: allows
1986: .Ic \&so
1987: file inclusion requests only with relative paths
1988: and only without ascending to any parent directory.
1989: By requesting the inclusion of a sensitive file, a malicious document
1990: might otherwise trick a privileged user into inadvertently displaying
1991: the file on the screen, revealing the file content to bystanders.
1992: .Nm
1993: only shows the path as it appears behind
1994: .Ic \&so .
1995: .It Sy ".so request failed"
1996: .Pq roff
1997: Servicing a
1998: .Ic \&so
1999: request requires reading an external file, but the file could not be
2000: opened.
2001: .Nm
2002: only shows the path as it appears behind
2003: .Ic \&so .
2004: .It Sy "skipping all arguments"
2005: .Pq mdoc , man , eqn , roff
2006: An
2007: .Xr mdoc 7
2008: .Ic \&Bt ,
2009: .Ic \&Ed ,
2010: .Ic \&Ef ,
2011: .Ic \&Ek ,
2012: .Ic \&El ,
2013: .Ic \&Lp ,
2014: .Ic \&Pp ,
2015: .Ic \&Re ,
2016: .Ic \&Rs ,
2017: or
2018: .Ic \&Ud
2019: macro, an
2020: .Ic \&It
2021: macro in a list that don't support item heads, a
2022: .Xr man 7
2023: .Ic \&LP ,
2024: .Ic \&P ,
2025: or
2026: .Ic \&PP
2027: macro, an
2028: .Xr eqn 7
2029: .Ic \&EQ
2030: or
2031: .Ic \&EN
2032: macro, or a
2033: .Xr roff 7
2034: .Ic \&br ,
2035: .Ic \&fi ,
2036: or
2037: .Ic \&nf
2038: request or
2039: .Sq \&..
2040: block closing request is invoked with at least one argument.
2041: All arguments are ignored.
2042: .It Sy "skipping excess arguments"
2043: .Pq mdoc , man , roff
2044: A macro or request is invoked with too many arguments:
2045: .Bl -dash -offset 2n -width 2n -compact
2046: .It
2047: .Ic \&Fo ,
1.130 bentley 2048: .Ic \&MT ,
1.76 schwarze 2049: .Ic \&PD ,
2050: .Ic \&RS ,
2051: .Ic \&UR ,
2052: .Ic \&ft ,
2053: or
2054: .Ic \&sp
2055: with more than one argument
2056: .It
2057: .Ic \&An
2058: with another argument after
2059: .Fl split
2060: or
2061: .Fl nosplit
2062: .It
2063: .Ic \&RE
2064: with more than one argument or with a non-integer argument
2065: .It
2066: .Ic \&OP
2067: or a request of the
2068: .Ic \&de
2069: family with more than two arguments
1.78 schwarze 2070: .It
2071: .Ic \&Dt
2072: with more than three arguments
1.76 schwarze 2073: .It
2074: .Ic \&TH
2075: with more than five arguments
2076: .It
2077: .Ic \&Bd ,
2078: .Ic \&Bk ,
2079: or
2080: .Ic \&Bl
2081: with invalid arguments
2082: .El
2083: The excess arguments are ignored.
2084: .El
2085: .Ss Unsupported features
2086: .Bl -ohang
2087: .It Sy "input too large"
2088: .Pq mdoc , man
2089: Currently,
2090: .Nm
2091: cannot handle input files larger than its arbitrary size limit
2092: of 2^31 bytes (2 Gigabytes).
2093: Since useful manuals are always small, this is not a problem in practice.
2094: Parsing is aborted as soon as the condition is detected.
2095: .It Sy "unsupported control character"
2096: .Pq roff
2097: An ASCII control character supported by other
2098: .Xr roff 7
2099: implementations but not by
2100: .Nm
2101: was found in an input file.
2102: It is replaced by a question mark.
2103: .It Sy "unsupported roff request"
2104: .Pq roff
2105: An input file contains a
2106: .Xr roff 7
2107: request supported by GNU troff or Heirloom troff but not by
2108: .Nm ,
2109: and it is likely that this will cause information loss
2110: or considerable misformatting.
2111: .It Sy "eqn delim option in tbl"
2112: .Pq eqn , tbl
2113: The options line of a table defines equation delimiters.
2114: Any equation source code contained in the table will be printed unformatted.
2115: .It Sy "unsupported table layout modifier"
2116: .Pq tbl
2117: A table layout specification contains an
2118: .Sq Cm m
2119: modifier.
2120: The modifier is discarded.
2121: .It Sy "ignoring macro in table"
2122: .Pq tbl , mdoc , man
2123: A table contains an invocation of an
2124: .Xr mdoc 7
2125: or
2126: .Xr man 7
2127: macro or of an undefined macro.
2128: The macro is ignored, and its arguments are handled
2129: as if they were a text line.
2130: .El
1.1 kristaps 2131: .Sh SEE ALSO
1.75 schwarze 2132: .Xr apropos 1 ,
2133: .Xr man 1 ,
1.47 schwarze 2134: .Xr eqn 7 ,
1.25 jmc 2135: .Xr man 7 ,
1.1 kristaps 2136: .Xr mandoc_char 7 ,
1.43 schwarze 2137: .Xr mdoc 7 ,
2138: .Xr roff 7 ,
2139: .Xr tbl 7
1.97 schwarze 2140: .Sh HISTORY
2141: The
2142: .Nm
2143: utility first appeared in
2144: .Ox 4.8 .
2145: The option
2146: .Fl I
2147: appeared in
2148: .Ox 5.2 ,
2149: and
2150: .Fl aCcfhKklMSsw
2151: in
2152: .Ox 5.7 .
1.1 kristaps 2153: .Sh AUTHORS
1.80 schwarze 2154: .An -nosplit
1.1 kristaps 2155: The
2156: .Nm
1.10 schwarze 2157: utility was written by
1.75 schwarze 2158: .An Kristaps Dzonsons Aq Mt kristaps@bsd.lv
2159: and is maintained by
2160: .An Ingo Schwarze Aq Mt schwarze@openbsd.org .