bin/texi2dvi

   1 #! /bin/sh
   2 # texi2dvi --- produce DVI (or PDF) files from Texinfo (or LaTeX) sources.
   3 # $Id: texi2dvi,v 1.1 2002/12/05 21:07:19 earnie Exp $
   4 #
   5 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2001,
   6 # 2002 Free Software Foundation, Inc.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2, or (at your option)
  11 # any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program; if not, you can either send email to this
  20 # program's maintainer or write to: The Free Software Foundation,
  21 # Inc.; 59 Temple Place, Suite 330; Boston, MA 02111-1307, USA.
  22 #
  23 # Original author: Noah Friedman <friedman@gnu.org>.
  24 #
  25 # Please send bug reports, etc. to bug-texinfo@gnu.org.
  26 # If possible, please send a copy of the output of the script called with
  27 # the `--debug' option when making a bug report.
  28
  29 # This string is expanded by rcs automatically when this file is checked out.
  30 rcs_revision='$Revision: 1.1 $'
  31 rcs_version=`set - $rcs_revision; echo $2`
  32 program=`echo $0 | sed -e 's!.*/!!'`
  33 version="texi2dvi (GNU Texinfo 4.3) $rcs_version
  34
  35 Copyright (C) 2002 Free Software Foundation, Inc.
  36 There is NO warranty.  You may redistribute this software
  37 under the terms of the GNU General Public License.
  38 For more information about these matters, see the files named COPYING."
  39
  40 usage="Usage: $program [OPTION]... FILE...
  41
  42 Run each Texinfo or LaTeX FILE through TeX in turn until all
  43 cross-references are resolved, building all indices.  The directory
  44 containing each FILE is searched for included files.  The suffix of FILE
  45 is used to determine its language (LaTeX or Texinfo).
  46
  47 Makeinfo is used to perform Texinfo macro expansion before running TeX
  48 when needed.
  49
  50 Operation modes:
  51   -b, --batch         no interaction
  52   -c, --clean         remove all auxiliary files
  53   -D, --debug         turn on shell debugging (set -x)
  54   -h, --help          display this help and exit successfully
  55   -o, --output=OFILE  leave output in OFILE (implies --clean);
  56                       Only one input FILE may be specified in this case
  57   -q, --quiet         no output unless errors (implies --batch)
  58   -s, --silent        same as --quiet
  59   -v, --version       display version information and exit successfully
  60   -V, --verbose       report on what is done
  61
  62 TeX tuning:
  63   -@                   use @input instead of \input; for preloaded Texinfo
  64   -e, -E, --expand     force macro expansion using makeinfo
  65   -I DIR               search DIR for Texinfo files
  66   -l, --language=LANG  specify the LANG of FILE (LaTeX or Texinfo)
  67   -p, --pdf            use pdftex or pdflatex for processing
  68   -t, --texinfo=CMD    insert CMD after @setfilename in copy of input file
  69                        multiple values accumulate
  70
  71 The values of the BIBTEX, LATEX (or PDFLATEX), MAKEINDEX, MAKEINFO,
  72 TEX (or PDFTEX), and TEXINDEX environment variables are used to run
  73 those commands, if they are set.
  74
  75 Email bug reports to <bug-texinfo@gnu.org>,
  76 general questions and discussion to <help-texinfo@gnu.org>.
  77 Texinfo home page: http://www.gnu.org/software/texinfo/"
  78
  79 # Initialize variables for option overriding and otherwise.
  80 # Don't use `unset' since old bourne shells don't have this command.
  81 # Instead, assign them an empty value.
  82 batch=false     # eval for batch mode
  83 clean=
  84 debug=
  85 escape='\'
  86 expand=         # t for expansion via makeinfo
  87 miincludes=     # makeinfo include path
  88 oformat=dvi
  89 oname=          # --output
  90 quiet=          # by default let the tools' message be displayed
  91 set_language=
  92 textra=
  93 tmpdir=${TMPDIR:-/tmp}/t2d$$  # avoid collisions on 8.3 filesystems.
  94 txincludes=     # TEXINPUTS extensions, with trailing colon
  95 txiprereq=19990129 # minimum texinfo.tex version to have macro expansion
  96 verbose=false   # echo for verbose mode
  97
  98 orig_pwd=`pwd`
  99
 100 # Systems which define $COMSPEC or $ComSpec use semicolons to separate
 101 # directories in TEXINPUTS.
 102 if test -n "$COMSPEC$ComSpec"; then
 103   path_sep=";"
 104 else
 105   path_sep=":"
 106 fi
 107
 108 # Pacify verbose cds.
 109 CDPATH=${ZSH_VERSION+.}$path_sep
 110
 111 # Save this so we can construct a new TEXINPUTS path for each file.
 112 TEXINPUTS_orig="$TEXINPUTS"
 113 # Unfortunately makeindex does not read TEXINPUTS.
 114 INDEXSTYLE_orig="$INDEXSTYLE"
 115 export TEXINPUTS INDEXSTYLE
 116
 117 # Push a token among the arguments that will be used to notice when we
 118 # ended options/arguments parsing.
 119 # Use "set dummy ...; shift" rather than 'set - ..." because on
 120 # Solaris set - turns off set -x (but keeps set -e).
 121 # Use ${1+"$@"} rather than "$@" because Digital Unix and Ultrix 4.3
 122 # still expand "$@" to a single argument (the empty string) rather
 123 # than nothing at all.
 124 arg_sep="$$--$$"
 125 set dummy ${1+"$@"} "$arg_sep"; shift
 126
 127 # \f
 128 # Parse command line arguments.
 129 while test x"$1" != x"$arg_sep"; do
 130
 131   # Handle --option=value by splitting apart and putting back on argv.
 132   case "$1" in
 133     --*=*)
 134       opt=`echo "$1" | sed -e 's/=.*//'`
 135       val=`echo "$1" | sed -e 's/[^=]*=//'`
 136       shift
 137       set dummy "$opt" "$val" ${1+"$@"}; shift
 138       ;;
 139   esac
 140
 141   # This recognizes --quark as --quiet.  So what.
 142   case "$1" in
 143     -@ ) escape=@;;
 144     # Silently and without documentation accept -b and --b[atch] as synonyms.
 145     -b | --b*) batch=eval;;
 146     -q | -s | --q* | --s*) quiet=t; batch=eval;;
 147     -c | --c*) clean=t;;
 148     -D | --d*) debug=t;;
 149     -e | -E | --e*) expand=t;;
 150     -h | --h*) echo "$usage"; exit 0;;
 151     -I | --I*)
 152       shift
 153       miincludes="$miincludes -I $1"
 154       txincludes="$txincludes$1$path_sep"
 155       ;;
 156     -l | --l*) shift; set_language=$1;;
 157     -o | --o*)
 158       shift
 159       clean=t
 160       case "$1" in
 161         /* | ?:/*) oname=$1;;
 162                 *) oname="$orig_pwd/$1";;
 163       esac;;
 164     -p | --p*) oformat=pdf;;
 165     -t | --t*) shift; textra="$textra\\
 166 $1";;
 167     -v | --vers*) echo "$version"; exit 0;;
 168     -V | --verb*) verbose=echo;;
 169     --) # What remains are not options.
 170       shift
 171       while test x"$1" != x"$arg_sep"; do
 172         set dummy ${1+"$@"} "$1"; shift
 173         shift
 174       done
 175       break;;
 176     -*)
 177       echo "$0: Unknown or ambiguous option \`$1'." >&2
 178       echo "$0: Try \`--help' for more information." >&2
 179       exit 1;;
 180     *) set dummy ${1+"$@"} "$1"; shift;;
 181    esac
 182    shift
 183 done
 184 # Pop the token
 185 shift
 186
 187 # Interpret remaining command line args as filenames.
 188 case $# in
 189  0)
 190   echo "$0: Missing file arguments." >&2
 191   echo "$0: Try \`--help' for more information." >&2
 192   exit 2
 193   ;;
 194  1) ;;
 195  *)
 196   if test -n "$oname"; then
 197     echo "$0: Can't use option \`--output' with more than one argument." >&2
 198     exit 2
 199   fi
 200   ;;
 201 esac
 202
 203 # Prepare the temporary directory.  Remove it at exit, unless debugging.
 204 if test -z "$debug"; then
 205   trap "cd / && rm -rf $tmpdir" 0 1 2 15
 206 fi
 207
 208 # Create the temporary directory with strict rights
 209 (umask 077 && mkdir $tmpdir) || exit 1
 210
 211 # Prepare the tools we might need.  This may be extra work in some
 212 # cases, but improves the readibility of the script.
 213 utildir=$tmpdir/utils
 214 mkdir $utildir || exit 1
 215
 216 # A sed script that preprocesses Texinfo sources in order to keep the
 217 # iftex sections only.  We want to remove non TeX sections, and
 218 # comment (with `@c texi2dvi') TeX sections so that makeinfo does not
 219 # try to parse them.  Nevertheless, while commenting TeX sections,
 220 # don't comment @macro/@end macro so that makeinfo does propagate
 221 # them.  Unfortunately makeinfo --iftex --no-ifhtml --no-ifinfo
 222 # doesn't work well enough (yet) to use that, so work around with sed.
 223 comment_iftex_sed=$utildir/comment.sed
 224 cat <<EOF >$comment_iftex_sed
 225 /^@tex/,/^@end tex/{
 226   s/^/@c texi2dvi/
 227 }
 228 /^@iftex/,/^@end iftex/{
 229   s/^/@c texi2dvi/
 230   /^@c texi2dvi@macro/,/^@c texi2dvi@end macro/{
 231     s/^@c texi2dvi//
 232   }
 233 }
 234 /^@html/,/^@end html/{
 235   s/^/@c (texi2dvi)/
 236 }
 237 /^@ifhtml/,/^@end ifhtml/{
 238   s/^/@c (texi2dvi)/
 239 }
 240 /^@ifnottex/,/^@end ifnottex/{
 241   s/^/@c (texi2dvi)/
 242 }
 243 /^@ifinfo/,/^@end ifinfo/{
 244   /^@node/p
 245   /^@menu/,/^@end menu/p
 246   t
 247   s/^/@c (texi2dvi)/
 248 }
 249 s/^@ifnotinfo/@c texi2dvi@ifnotinfo/
 250 s/^@end ifnotinfo/@c texi2dvi@end ifnotinfo/
 251 EOF
 252 # Uncommenting is simple: Remove any leading `@c texi2dvi'.
 253 uncomment_iftex_sed=$utildir/uncomment.sed
 254 cat <<EOF >$uncomment_iftex_sed
 255 s/^@c texi2dvi//
 256 EOF
 257
 258 # A shell script that computes the list of xref files.
 259 # Takes the filename (without extension) of which we look for xref
 260 # files as argument.  The index files must be reported last.
 261 get_xref_files=$utildir/get_xref.sh
 262 cat <<\EOF >$get_xref_files
 263 #! /bin/sh
 264
 265 # Get list of xref files (indexes, tables and lists).
 266 # Find all files having root filename with a two-letter extension,
 267 # saves the ones that are really Texinfo-related files.  .?o? catches
 268 # many files: .toc, .log, LaTeX tables and lists, FiXme's .lox, maybe more.
 269 for this_file in "$1".?o? "$1".aux "$1".?? "$1".idx; do
 270   # If file is empty, skip it.
 271   test -s "$this_file" || continue
 272   # If the file is not suitable to be an index or xref file, don't
 273   # process it.  The file can't be if its first character is not a
 274   # backslash or single quote.
 275   first_character=`sed -n '1s/^\(.\).*$/\1/p;q' $this_file`
 276   if test "x$first_character" = "x\\" \
 277      || test "x$first_character" = "x'"; then
 278     xref_files="$xref_files ./$this_file"
 279   fi
 280 done
 281 echo "$xref_files"
 282 EOF
 283 chmod 500 $get_xref_files
 284
 285 # File descriptor usage:
 286 # 0 standard input
 287 # 1 standard output (--verbose messages)
 288 # 2 standard error
 289 # 3 some systems may open it to /dev/tty
 290 # 4 used on the Kubota Titan
 291 # 5 tools output (turned off by --quiet)
 292
 293 # Tools' output.  If quiet, discard, else redirect to the message flow.
 294 if test "$quiet" = t; then
 295   exec 5>/dev/null
 296 else
 297   exec 5>&1
 298 fi
 299
 300 # Enable tracing
 301 test "$debug" = t && set -x
 302
 303 # \f
 304 # TeXify files.
 305
 306 for command_line_filename in ${1+"$@"}; do
 307   $verbose "Processing $command_line_filename ..."
 308
 309   # If the COMMAND_LINE_FILENAME is not absolute (e.g., --debug.tex),
 310   # prepend `./' in order to avoid that the tools take it as an option.
 311   echo "$command_line_filename" | egrep '^(/|[A-z]:/)' >/dev/null \
 312   || command_line_filename="./$command_line_filename"
 313
 314   # See if the file exists.  If it doesn't we're in trouble since, even
 315   # though the user may be able to reenter a valid filename at the tex
 316   # prompt (assuming they're attending the terminal), this script won't
 317   # be able to find the right xref files and so forth.
 318   if test ! -r "$command_line_filename"; then
 319     echo "$0: Could not read $command_line_filename, skipping." >&2
 320     continue
 321   fi
 322
 323   # Get the name of the current directory.  We want the full path
 324   # because in clean mode we are in tmp, in which case a relative
 325   # path has no meaning.
 326   filename_dir=`echo $command_line_filename | sed 's!/[^/]*$!!;s!^$!.!'`
 327   filename_dir=`cd "$filename_dir" >/dev/null && pwd`
 328
 329   # Strip directory part but leave extension.
 330   filename_ext=`basename "$command_line_filename"`
 331   # Strip extension.
 332   filename_noext=`echo "$filename_ext" | sed 's/\.[^.]*$//'`
 333   ext=`echo "$filename_ext" | sed 's/^.*\.//'`
 334
 335   # _src.  Use same basename since we want to generate aux files with
 336   # the same basename as the manual.  If --expand, then output the
 337   # macro-expanded file to here, else copy the original file.
 338   tmpdir_src=$tmpdir/src
 339   filename_src=$tmpdir_src/$filename_noext.$ext
 340
 341   # _xtr.  The file with the user's extra commands.
 342   tmpdir_xtr=$tmpdir/xtr
 343   filename_xtr=$tmpdir_xtr/$filename_noext.$ext
 344
 345   # _bak.  Copies of the previous xref files (another round is run if
 346   # they differ from the new one).
 347   tmpdir_bak=$tmpdir/bak
 348
 349   # Make all those directories and give up if we can't succeed.
 350   mkdir $tmpdir_src $tmpdir_xtr $tmpdir_bak || exit 1
 351
 352   # Source file might include additional sources.
 353   # We want `.:$orig_pwd' before anything else.  (We'll add `.:' later
 354   # after all other directories have been turned into absolute paths.)
 355   # `.' goes first to ensure that any old .aux, .cps,
 356   # etc. files in ${directory} don't get used in preference to fresher
 357   # files in `.'.  Include orig_pwd in case we are in clean mode, where
 358   # we've cd'd to a temp directory.
 359   common="$orig_pwd$path_sep$filename_dir$path_sep$txincludes"
 360    TEXINPUTS="$common$TEXINPUTS_orig"
 361   INDEXSTYLE="$common$INDEXSTYLE_orig"
 362
 363   # Convert relative paths to absolute paths, so we can run in another
 364   # directory (e.g., in --clean mode, or during the macro-support
 365   # detection.)
 366   #
 367   # Empty path components are meaningful to tex.  We rewrite them
 368   # as `EMPTY' so they don't get lost when we split on $path_sep.
 369    TEXINPUTS=`echo $TEXINPUTS  |sed 's/^:/EMPTY:/;s/:$/:EMPTY/;s/::/:EMPTY:/g'`
 370   INDEXSTYLE=`echo $INDEXSTYLE |sed 's/^:/EMPTY:/;s/:$/:EMPTY/;s/::/:EMPTY:/g'`
 371   save_IFS=$IFS
 372   IFS=$path_sep
 373   set x $TEXINPUTS; shift
 374   TEXINPUTS=.
 375   for dir
 376   do
 377     case $dir in
 378       EMPTY)
 379         TEXINPUTS=$TEXINPUTS$path_sep
 380         ;;
 381       [\\/]* | ?:[\\/]*)        # Absolute paths don't need to be expansed.
 382         TEXINPUTS=$TEXINPUTS$path_sep$dir
 383         ;;
 384       *)
 385         abs=`cd "$dir" && pwd` && TEXINPUTS=$TEXINPUTS$path_sep$abs
 386         ;;
 387     esac
 388   done
 389   set x $INDEXSTYLE; shift
 390   INDEXSTYLE=.
 391   for dir
 392   do
 393     case $dir in
 394       EMPTY)
 395         INDEXSTYLE=$INDEXSTYLE$path_sep
 396         ;;
 397       [\\/]* | ?:[\\/]*)        # Absolute paths don't need to be expansed.
 398         INDEXSTYLE=$INDEXSTYLE$path_sep$dir
 399         ;;
 400       *)
 401         abs=`cd "$dir" && pwd` && INDEXSTYLE=$INDEXSTYLE$path_sep$abs
 402         ;;
 403     esac
 404   done
 405   IFS=$save_IFS
 406
 407   # If the user explicitly specified the language, use that.
 408   # Otherwise, if the first line is \input texinfo, assume it's texinfo.
 409   # Otherwise, guess from the file extension.
 410   if test -n "$set_language"; then
 411     language=$set_language
 412   elif sed 1q "$command_line_filename" | fgrep 'input texinfo' >/dev/null; then
 413     language=texinfo
 414   else
 415     language=
 416   fi
 417
 418   # Get the type of the file (latex or texinfo) from the given language
 419   # we just guessed, or from the file extension if not set yet.
 420   case ${language:-$filename_ext} in
 421     [lL]a[tT]e[xX] | *.ltx | *.tex)
 422       # Assume a LaTeX file.  LaTeX needs bibtex and uses latex for
 423       # compilation.  No makeinfo.
 424       bibtex=${BIBTEX:-bibtex}
 425       makeinfo= # no point in running makeinfo on latex source.
 426       texindex=${MAKEINDEX:-makeindex}
 427       if test $oformat = dvi; then
 428         tex=${LATEX:-latex}
 429       else
 430         tex=${PDFLATEX:-pdflatex}
 431       fi
 432       ;;
 433
 434     *)
 435       # Assume a Texinfo file.  Texinfo files need makeinfo, texindex and tex.
 436       bibtex=
 437       texindex=${TEXINDEX:-texindex}
 438       if test $oformat = dvi; then
 439         tex=${TEX:-tex}
 440       else
 441         tex=${PDFTEX:-pdftex}
 442       fi
 443       # Unless required by the user, makeinfo expansion is wanted only
 444       # if texinfo.tex is too old.
 445       if test "$expand" = t; then
 446         makeinfo=${MAKEINFO:-makeinfo}
 447       else
 448         # Check if texinfo.tex performs macro expansion by looking for
 449         # its version.  The version is a date of the form YEAR-MO-DA.
 450         # We don't need to use [0-9] to match the digits since anyway
 451         # the comparison with $txiprereq, a number, will fail with non
 452         # digits.
 453         txiversion_tex=txiversion.tex
 454         echo '\input texinfo.tex @bye' >$tmpdir/$txiversion_tex
 455         # Run in the tmpdir to avoid leaving files.
 456         eval `cd $tmpdir >/dev/null &&
 457               $tex $txiversion_tex 2>/dev/null |
 458               sed -n 's/^.*\[\(.*\)version \(....\)-\(..\)-\(..\).*$/txiformat=\1 txiversion="\2\3\4"/p'`
 459         $verbose "texinfo.tex preloaded as \`$txiformat', version is \`$txiversion' ..."
 460         if test "$txiprereq" -le "$txiversion" >/dev/null 2>&1; then
 461           makeinfo=
 462         else
 463           makeinfo=${MAKEINFO:-makeinfo}
 464         fi
 465         # As long as we had to run TeX, offer the user this convenience
 466         if test "$txiformat" = Texinfo; then
 467           escape=@
 468         fi
 469       fi
 470       ;;
 471   esac
 472
 473   # Expand macro commands in the original source file using Makeinfo.
 474   # Always use `end' footnote style, since the `separate' style
 475   #   generates different output (arguably this is a bug in -E).
 476   # Discard main info output, the user asked to run TeX, not makeinfo.
 477   if test -n "$makeinfo"; then
 478     $verbose "Macro-expanding $command_line_filename to $filename_src ..."
 479     sed -f $comment_iftex_sed "$command_line_filename" \
 480       | $makeinfo --footnote-style=end -I "$filename_dir" $miincludes \
 481         -o /dev/null --macro-expand=- \
 482       | sed -f $uncomment_iftex_sed >"$filename_src"
 483     filename_input=$filename_src
 484   fi
 485
 486   # If makeinfo failed (or was not even run), use the original file as input.
 487   if test $? -ne 0 \
 488      || test ! -r "$filename_src"; then
 489     $verbose "Reverting to $command_line_filename ..."
 490     filename_input=$filename_dir/$filename_ext
 491   fi
 492
 493   # Used most commonly for @finalout, @smallbook, etc.
 494   if test -n "$textra"; then
 495     $verbose "Inserting extra commands: $textra"
 496     sed '/^@setfilename/a\
 497 '"$textra" "$filename_input" >$filename_xtr
 498     filename_input=$filename_xtr
 499   fi
 500
 501   # If clean mode was specified, then move to the temporary directory.
 502   if test "$clean" = t; then
 503     $verbose "cd $tmpdir_src"
 504     cd "$tmpdir_src" || exit 1
 505   fi
 506
 507   while :; do # will break out of loop below
 508     orig_xref_files=`$get_xref_files "$filename_noext"`
 509
 510     # Save copies of originals for later comparison.
 511     if test -n "$orig_xref_files"; then
 512       $verbose "Backing up xref files: `echo $orig_xref_files | sed 's|\./||g'`"
 513       cp $orig_xref_files $tmpdir_bak
 514     fi
 515
 516     # Run bibtex on current file.
 517     # - If its input (AUX) exists.
 518     # - If AUX contains both `\bibdata' and `\bibstyle'.
 519     # - If some citations are missing (LOG contains `Citation').
 520     #   or the LOG complains of a missing .bbl
 521     #
 522     # We run bibtex first, because I can see reasons for the indexes
 523     # to change after bibtex is run, but I see no reason for the
 524     # converse.
 525     #
 526     # Don't try to be too smart.  Running bibtex only if the bbl file
 527     # exists and is older than the LaTeX file is wrong, since the
 528     # document might include files that have changed.  Because there
 529     # can be several AUX (if there are \include's), but a single LOG,
 530     # looking for missing citations in LOG is easier, though we take
 531     # the risk to match false messages.
 532     if test -n "$bibtex" \
 533        && test -r "$filename_noext.aux" \
 534        && test -r "$filename_noext.log" \
 535        && (grep '^\\bibdata[{]'  "$filename_noext.aux" \
 536            && grep '^\\bibstyle[{]' "$filename_noext.aux" \
 537            && (grep 'Warning:.*Citation.*undefined' "$filename_noext.log" \
 538                || grep 'No file .*\.bbl\.' "$filename_noext.log")) \
 539           >/dev/null 2>&1; \
 540     then
 541       $verbose "Running $bibtex $filename_noext ..."
 542       if $bibtex "$filename_noext" >&5; then :; else
 543         echo "$0: $bibtex exited with bad status, quitting." >&2
 544         exit 1
 545       fi
 546     fi
 547
 548     # What we'll run texindex on -- exclude non-index files.
 549     # Since we know index files are last, it is correct to remove everything
 550     # before .aux and .?o?.  But don't really do <anything>o<anything>
 551     # -- don't match whitespace as <anything>.
 552     # Otherwise, if orig_xref_files contains something like
 553     #   foo.xo foo.whatever
 554     # the space after the o will get matched.
 555     index_files=`echo "$orig_xref_files" \
 556                  | sed "s!.*\.aux!!g;
 557                         s!./$filename_noext\.[^ ]o[^ ]!!g;
 558                         s/^[ ]*//;s/[ ]*$//"`
 559     # Run texindex (or makeindex) on current index files.  If they
 560     # already exist, and after running TeX a first time the index
 561     # files don't change, then there's no reason to run TeX again.
 562     # But we won't know that if the index files are out of date or
 563     # nonexistent.
 564     if test -n "$texindex" && test -n "$index_files"; then
 565       $verbose "Running $texindex $index_files ..."
 566       if $texindex $index_files 2>&5 1>&2; then :; else
 567          echo "$0: $texindex exited with bad status, quitting." >&2
 568          exit 1
 569       fi
 570     fi
 571
 572     # Finally, run TeX.
 573     # Prevent $ESCAPE from being interpreted by the shell if it happens
 574     # to be `/'.
 575     $batch tex_args="\\${escape}nonstopmode\ \\${escape}input"
 576     cmd="$tex $tex_args $filename_input"
 577     $verbose "Running $cmd ..."
 578     if $cmd >&5; then :; else
 579       echo "$0: $tex exited with bad status, quitting." >&2
 580       echo "$0: see $filename_noext.log for errors." >&2
 581       test "$clean" = t \
 582         && cp "$filename_noext.log" "$orig_pwd"
 583       exit 1
 584     fi
 585
 586
 587     # Decide if looping again is needed.
 588     finished=t
 589
 590     # LaTeX (and the package changebar) report in the LOG file if it
 591     # should be rerun.  This is needed for files included from
 592     # subdirs, since texi2dvi does not try to compare xref files in
 593     # subdirs.  Performing xref files test is still good since LaTeX
 594     # does not report changes in xref files.
 595     if fgrep "Rerun to get" "$filename_noext.log" >/dev/null 2>&1; then
 596       finished=
 597     fi
 598
 599     # Check if xref files changed.
 600     new_xref_files=`$get_xref_files "$filename_noext"`
 601     $verbose "Original xref files = `echo $orig_xref_files | sed 's|\./||g'`"
 602     $verbose "New xref files      = `echo $new_xref_files | sed 's|\./||g'`"
 603
 604     # If old and new lists don't at least have the same file list,
 605     # then one file or another has definitely changed.
 606     test "x$orig_xref_files" != "x$new_xref_files" && finished=
 607
 608     # File list is the same.  We must compare each file until we find
 609     # a difference.
 610     if test -n "$finished"; then
 611       for this_file in $new_xref_files; do
 612         $verbose "Comparing xref file `echo $this_file | sed 's|\./||g'` ..."
 613         # cmp -s returns nonzero exit status if files differ.
 614         if cmp -s "$this_file" "$tmpdir_bak/$this_file"; then :; else
 615           # We only need to keep comparing until we find one that
 616           # differs, because we'll have to run texindex & tex again no
 617           # matter how many more there might be.
 618           finished=
 619           $verbose "xref file `echo $this_file | sed 's|\./||g'` differed ..."
 620           test "$debug" = t && diff -c "$tmpdir_bak/$this_file" "$this_file"
 621           break
 622         fi
 623       done
 624     fi
 625
 626     # If finished, exit the loop, else rerun the loop.
 627     test -n "$finished" && break
 628   done
 629
 630   # If we were in clean mode, compilation was in a tmp directory.
 631   # Copy the DVI (or PDF) file into the directory where the compilation
 632   # has been done.  (The temp dir is about to get removed anyway.)
 633   # We also return to the original directory so that
 634   # - the next file is processed in correct conditions
 635   # - the temporary file can be removed
 636   if test -n "$clean"; then
 637     if test -n "$oname"; then
 638        dest=$oname
 639     else
 640        dest=$orig_pwd
 641     fi
 642     $verbose "Copying $oformat file from `pwd` to $dest"
 643     cp -p "./$filename_noext.$oformat" "$dest"
 644     cd / # in case $orig_pwd is on a different drive (for DOS)
 645     cd $orig_pwd || exit 1
 646   fi
 647
 648   # Remove temporary files.
 649   if test "x$debug" = "x"; then
 650     $verbose "Removing $tmpdir_src $tmpdir_xtr $tmpdir_bak ..."
 651     cd /
 652     rm -rf $tmpdir_src $tmpdir_xtr $tmpdir_bak
 653   fi
 654 done
 655
 656 $verbose "$0 done."
 657 exit 0 # exit successfully, not however we ended the loop.