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+#!/bin/sh
+
+# Thomas Esser, 1999, 2002, 2003. public domain.
+
+# texlinks: script to maintain symlinks from format to engine. Interprets
+# the lines given in fmtutil.cnf.
+
+# History:
+# (Further changes in ChangeLog.)
+# Tue Oct 9 14:23:01 BST 2007
+# Added unlink option (-u) to aid OpenBSD package uninstall
+# Edd Barrett <vext01@gmail.com>
+# Sun Aug 28 21:41:06 CEST 2005
+# remove special cases for csplain,cslatex,pdfcslatex,pdfcsplain
+# Fr Apr 8 19:15:05 CEST 2005
+# cleanup now has an argument for the return code
+# So Mar 27 18:52:06 CEST 2005
+# honor $TMPDIR, $TEMP and $TMP, not just $TMP
+# Mon May 10 20:52:48 CEST 2004
+# kpseaccess instead of access
+# Thu Dec 25 22:11:53 CET 2003, te:
+# add version string
+# Tue Apr 9 22:46:34 CEST 2002, te:
+# do not create symlinks for cont-??, metafun and mptopdf
+
+test -f /bin/sh5 && test -z "$RUNNING_SH5" \
+ && { UNAMES=`uname -s`; test "x$UNAMES" = xULTRIX; } 2>/dev/null \
+ && { RUNNING_SH5=true; export RUNNING_SH5; exec /bin/sh5 $0 ${1+"$@"}; }
+unset RUNNING_SH5
+
+test -f /bin/bsh && test -z "$RUNNING_BSH" \
+ && { UNAMES=`uname -s`; test "x$UNAMES" = xAIX; } 2>/dev/null \
+ && { RUNNING_BSH=true; export RUNNING_BSH; exec /bin/bsh $0 ${1+"$@"}; }
+unset RUNNING_BSH
+
+export PATH
+
+# hack around a bug in zsh:
+test -n "${ZSH_VERSION+set}" && alias -g '${1+"$@"}'='"$@"'
+
+cnf=fmtutil.cnf # name of the config file
+version=20080528.1847 # utc timestamp
+progname=texlinks
+
+usage='Usage: texlinks [OPTION]... [DIRECTORY]...
+
+Create symbolic links format -> engine according to fmtutil setup.
+
+Mandatory arguments to long options are mandatory for short options too.
+ -h, --help show this help text
+ --version show version string
+ -f, --cnffile FILE use FILE as config file (default: fmtutil.cnf)
+ -v, --verbose enable verbose messages (default: off)
+ -m, --multiplatform operate in all platform specific directories
+ (default: operate only in directory for this platform)
+ -s, --silent silently skip existing scripts / binaries
+ (default: issue warning)
+ -u, --unlink remove symlinks created by texlinks
+
+The DIRECTORY arguments are an optional list of directories in which to
+operate. If no directories are specified and --multiplatform is
+likewise not specified, the directory of this script itself is used.
+With --multiplatform, all child dirs of an upper-level bin/ dir are used.
+
+Report bugs to tex-k@tug.org.'
+
+###############################################################################
+# abort(errmsg)
+# print `errmsg' to stderr and exit with error code 1
+###############################################################################
+abort() { errmsg "texlinks: $1."; cleanup 1; }
+
+# error message to stderr:
+errmsg() { echo "$@" >&2; }
+
+# give message to stderr only if "verbose" mode is on:
+verbose_echo() { $verbose && errmsg "$@"; }
+
+# in verbose mode: show command that is executed:
+verbose_do() { verbose_echo "$@"; "$@"; }
+
+###############################################################################
+# cleanup()
+# clean up the temp area and exit with proper exit status
+###############################################################################
+cleanup()
+{
+ rc=$1
+ $needsCleanup && test -n "$tmpdir" && test -d "$tmpdir" \
+ && { rm -f "$tmpdir"/*; cd /; rmdir "$tmpdir"; }
+ exit $rc
+}
+
+###############################################################################
+# setupTmpDir()
+# set up a temp directory and a trap to remove it
+###############################################################################
+setupTmpDir()
+{
+ $needsCleanup && return
+
+ trap 'cleanup 1' 1 2 3 7 13 15
+ needsCleanup=true
+ (umask 077; mkdir "$tmpdir") \
+ || abort "could not create directory \`$tmpdir'"
+}
+
+
+# search a binary along $PATH:
+check_for_binary()
+{
+ testbin=$1
+ set x `echo "$PATH" | sed 's/^:/.:/; s/:$/:./; s/::/:.:/g; s/:/ /g'`; shift
+ for i
+ do
+ if [ -x "$i/$testbin" ]; then
+ echo "$i/$testbin"
+ return 0
+ fi
+ done
+ return 1
+}
+
+
+###############################################################################
+# install_link(dest src)
+# create a symlink like ln -s dest src, but make sure that src is not
+# an existing binary
+###############################################################################
+install_link()
+{
+ # make symlink src -> dest
+ dest=$1; src=$2
+
+ case $src in
+ */mf)
+ if test "$dest" = mf-nowin; then
+ if test -f $selfautoloc/mfw; then
+ dest=mfw # name for windows-enabled mf, once upon a time
+ verbose_echo "both mfw and mf-nowin exists, $src linked to $dest"
+ fi
+ if test -f $selfautoloc/mf && test -f $selfautoloc/mf-nowin; then
+ # have both mf and mf-nowin binaries. no link.
+ verbose_echo "skipped metafont symlink $src -> $dest (special case)"
+ return
+ fi
+ fi
+ ;;
+ esac
+
+ case $src in
+ */cont-??|*/metafun|*/mptopdf)
+ # context includes wrapper scripts that create/run these.
+ verbose_echo "skipped ConTeXtish symlink $src -> $dest (special case)"
+ ;;
+ *)
+ test "x$src" != "x`(ls -ld $src | awk '{print $NF}') 2>/dev/null`" &&
+ verbose_do rm -f "$src"
+
+ if test -f "$src"; then
+ case $silent in
+ true)
+ ;;
+ *)
+ errmsg "install_link $src -> $dest failed: file already exists."
+ ;;
+ esac
+ else
+ verbose_do ln -s "$dest" "$src"
+ fi
+ ;;
+ esac
+}
+
+###############################################################################
+# search_symlinkdir()
+# look if $PATH has only symlinks to the real binaries and find that
+# directory. Also check if this directory is writable.
+###############################################################################
+search_symlinkdir()
+{
+ kpsewhich=`check_for_binary kpsewhich`
+ test -z "$kpsewhich" && return 1
+ symlinkdir=`echo $kpsewhich | sed 's@/*kpsewhich$@@'`
+ kpseaccess -w "$symlinkdir" || return 1
+ touch "$symlinkdir/tl$$"
+ if test -f "$selfautoloc/tl$$"; then
+ rm -f "$symlinkdir/tl$$"
+ return 1
+ else
+ rm -f "$symlinkdir/tl$$"
+ return 0
+ fi
+}
+
+###############################################################################
+# upd_symlinkdir()
+# if $PATH has only symlinks to the real binaries, update that directory
+# that holds the symlinks
+###############################################################################
+upd_symlinkdir()
+{
+ search_symlinkdir || return 0
+ for i in `sed 's@ .*@@' cnf_file_ln.$$`; do
+ install_link "$selfautoloc/$i" "$symlinkdir/$i"
+ done
+}
+
+###############################################################################
+# rm_link()
+# Delete a previously installed link
+###############################################################################
+rm_link()
+{
+ link=$1;
+ if test -e $link; then
+ if test -h $link; then
+ verbose_do rm -Rf $link
+ else
+ verbose_echo "kept $link, since not a symlink"
+ fi
+ else
+ verbose_echo "skipped $link, non-existent"
+ fi
+}
+
+###############################################################################
+# main()
+# parse commandline arguments, initialize variables,
+# switch into temp. direcrory, execute desired command
+###############################################################################
+main()
+{
+ cnf_file= # global variable: full name of the config file
+ dirs=
+ needsCleanup=false
+
+ multiplatform=false
+ verbose=false
+ unlink=false
+ silent=false
+ thisdir=`pwd`
+ : ${KPSE_DOT=$thisdir}; export KPSE_DOT
+ selfautoloc=`kpsewhich --expand-var='$SELFAUTOLOC'`
+ while
+ case $1 in
+ --h*|-h)
+ echo "$usage"; exit 0;;
+ --version)
+ echo "$progname version $version."; exit 0;;
+ --cnffile|-f)
+ shift; cnf_file=$1;;
+ --v*|-v) verbose=true;;
+ --s*|-s) silent=true;;
+ --m*|-m) multiplatform=true;;
+ --u*|-u) unlink=true;;
+ -*) errmsg "fmtutil: unknown option \`$1' ignored.";;
+ *) break;;
+ esac
+ do test $# -gt 0 && shift; done
+ dirs="$*"
+
+ # if no cnf_file from command-line, look it up with kpsewhich:
+ test -z "$cnf_file" && cnf_file=`kpsewhich --format='web2c files' $cnf`
+ test -f "$cnf_file" || abort "config file \`$cnf' not found"
+
+
+ tmpdir=${TMPDIR-${TEMP-${TMP-/tmp}}}/texlinks.$$
+ setupTmpDir
+ cd "$tmpdir" || cleanup 1
+
+ sed '/^[ ]*#/d; /^[ ]*$/d' $cnf_file \
+ | awk '{print $1, $2}' > cnf_file_ln.$$
+
+ if test -z "$dirs"; then
+ if test $multiplatform = true; then
+ case $selfautoloc in
+ */bin) dirs=$selfautoloc;;
+ *) parent=`kpsewhich --expand-var='$SELFAUTODIR'`
+ dirs=`find $parent -type f -name kpsewhich -print \
+ | sed 's@/kpsewhich$@@'`;;
+ esac
+ else
+ dirs=$selfautoloc
+ fi
+ fi
+
+ for d in $dirs; do
+ kpseaccess -w $d \
+ || { errmsg "$d: no write permissions. Skipping..."; continue; }
+ # cnf_file_ln.$$ has lines with "format engine" pairs
+ set x `cat cnf_file_ln.$$`; shift
+ while test $# != 0; do
+ fmt=$1; engine=$2; shift; shift
+
+ # Some broken shells destroy the positional arguments when calling a
+ # shellfunction. Therefore, we save and restore them "by hand" in the
+ # main_args_while variable.
+ main_args_while="$@"
+
+ test "x$fmt" = "x$engine" && continue
+ if test -f "$d/$engine"; then
+ case $unlink in
+ true)
+ rm_link "$d/$fmt";;
+ *)
+ install_link "$engine" "$d/$fmt";;
+ esac
+ else
+ verbose_echo "skipped $d/$engine, engine does not exist"
+ fi
+
+ # restore positional arguments:
+ set x $main_args_while; shift
+
+ done
+ done
+ upd_symlinkdir
+}
+
+main ${1+"$@"}
+
+# set successful return code
+cleanup 0