pdftotext.1

这是一个做pdf阅读器的源代码文件,是大家学习阅读器资料的很好参考

.\" Copyright 1997-2007 Glyph & Cog, LLC
.TH pdftotext 1 "27 Febuary 2007"
.SH NAME
pdftotext \- Portable Document Format (PDF) to text converter
(version 3.02)
.SH SYNOPSIS
.B pdftotext
[options]
.RI [ PDF-file
.RI [ text-file ]]
.SH DESCRIPTION
.B Pdftotext
converts Portable Document Format (PDF) files to plain text.
.PP
Pdftotext reads the PDF file,
.IR PDF-file ,
and writes a text file,
.IR text-file .
If
.I text-file
is not specified, pdftotext converts
.I file.pdf
to
.IR file.txt .
If 
.I text-file
is \'-', the text is sent to stdout.
.SH CONFIGURATION FILE
Pdftotext reads a configuration file at startup.  It first tries to
find the user's private config file, ~/.xpdfrc.  If that doesn't
exist, it looks for a system-wide config file, typically
/usr/local/etc/xpdfrc (but this location can be changed when pdftotext
is built).  See the
.BR xpdfrc (5)
man page for details.
.SH OPTIONS
Many of the following options can be set with configuration file
commands.  These are listed in square brackets with the description of
the corresponding command line option.
.TP
.BI \-f " number"
Specifies the first page to convert.
.TP
.BI \-l " number"
Specifies the last page to convert.
.TP
.B \-layout
Maintain (as best as possible) the original physical layout of the
text.  The default is to \'undo' physical layout (columns,
hyphenation, etc.) and output the text in reading order.
.TP
.B \-raw
Keep the text in content stream order.  This is a hack which often
"undoes" column formatting, etc.  Use of raw mode is no longer
recommended.
.TP
.B \-htmlmeta
Generate a simple HTML file, including the meta information.  This
simply wraps the text in <pre> and </pre> and prepends the meta
headers.
.TP
.BI \-enc " encoding-name"
Sets the encoding to use for text output.  The
.I encoding\-name
must be defined with the unicodeMap command (see
.BR xpdfrc (5)).
The encoding name is case-sensitive.  This defaults to "Latin1" (which
is a built-in encoding).
.RB "[config file: " textEncoding ]
.TP
.BI \-eol " unix | dos | mac"
Sets the end-of-line convention to use for text output.
.RB "[config file: " textEOL ]
.TP
.B \-nopgbrk
Don't insert page breaks (form feed characters) between pages.
.RB "[config file: " textPageBreaks ]
.TP
.BI \-opw " password"
Specify the owner password for the PDF file.  Providing this will
bypass all security restrictions.
.TP
.BI \-upw " password"
Specify the user password for the PDF file.
.TP
.B \-q
Don't print any messages or errors.
.RB "[config file: " errQuiet ]
.TP
.BI \-cfg " config-file"
Read
.I config-file
in place of ~/.xpdfrc or the system-wide config file.
.TP
.B \-v
Print copyright and version information.
.TP
.B \-h
Print usage information.
.RB ( \-help
and
.B \-\-help
are equivalent.)
.SH BUGS
Some PDF files contain fonts whose encodings have been mangled beyond
recognition.  There is no way (short of OCR) to extract text from
these files.
.SH EXIT CODES
The Xpdf tools use the following exit codes:
.TP
0
No error.
.TP
1
Error opening a PDF file.
.TP
2
Error opening an output file.
.TP
3
Error related to PDF permissions.
.TP
99
Other error.
.SH AUTHOR
The pdftotext software and documentation are copyright 1996-2007 Glyph
& Cog, LLC.
.SH "SEE ALSO"
.BR xpdf (1),
.BR pdftops (1),
.BR pdfinfo (1),
.BR pdffonts (1),
.BR pdftoppm (1),
.BR pdfimages (1),
.BR xpdfrc (5)
.br
.B http://www.foolabs.com/xpdf/