cpython/install-sh at master · python-emscripten/cpython · GitHub

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#!/bin/sh

# install - install a program, script, or datafile

scriptversion=2018-03-11.20; # UTC

# This originates from X11R5 (mit/util/scripts/install.sh), which was

# later released in X11R6 (xc/config/util/install.sh) with the

# following copyright and license.

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to

# deal in the Software without restriction, including without limitation the

# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

# sell copies of the Software, and to permit persons to whom the Software is

# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in

# all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-

# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# Except as contained in this notice, the name of the X Consortium shall not

# be used in advertising or otherwise to promote the sale, use or other deal-

# ings in this Software without prior written authorization from the X Consor-

# tium.

# FSF changes to this file are in the public domain.

# Calling this script install-sh is preferred over install.sh, to prevent

# 'make' implicit rules from creating a file called install from it

# when there is no Makefile.

# This script is compatible with the BSD install script, but was written

# from scratch.

tab=' '

nl='

IFS=" $tab$nl"

# Set DOITPROG to "echo" to test this script.

doit=${DOITPROG-}

doit_exec=${doit:-exec}

# Put in absolute file names if you don't have them in your path;

# or use environment vars.

chgrpprog=${CHGRPPROG-chgrp}

chmodprog=${CHMODPROG-chmod}

chownprog=${CHOWNPROG-chown}

cmpprog=${CMPPROG-cmp}

cpprog=${CPPROG-cp}

mkdirprog=${MKDIRPROG-mkdir}

mvprog=${MVPROG-mv}

rmprog=${RMPROG-rm}

stripprog=${STRIPPROG-strip}

posix_mkdir=

# Desired mode of installed file.

mode=0755

chgrpcmd=

chmodcmd=$chmodprog

chowncmd=

mvcmd=$mvprog

rmcmd="$rmprog -f"

stripcmd=

src=

dst=

dir_arg=

dst_arg=

copy_on_change=false

is_target_a_directory=possibly

usage="\

Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE

or: $0 [OPTION]... SRCFILES... DIRECTORY

or: $0 [OPTION]... -t DIRECTORY SRCFILES...

or: $0 [OPTION]... -d DIRECTORIES...

In the 1st form, copy SRCFILE to DSTFILE.

In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.

In the 4th, create DIRECTORIES.

Options:

--help display this help and exit.

--version display version info and exit.

-c (ignored)

-C install only if different (preserve the last data modification time)

-d create directories instead of installing files.

-g GROUP $chgrpprog installed files to GROUP.

-m MODE $chmodprog installed files to MODE.

-o USER $chownprog installed files to USER.

-s $stripprog installed files.

-t DIRECTORY install into DIRECTORY.

-T report an error if DSTFILE is a directory.

Environment variables override the default commands:

CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG

RMPROG STRIPPROG

while test $# -ne 0; do

case $1 in

-c) ;;

-C) copy_on_change=true;;

-d) dir_arg=true;;

-g) chgrpcmd="$chgrpprog $2"

shift;;

--help) echo "$usage"; exit $?;;

-m) mode=$2

case $mode in

*' '* | *"$tab"* | *"$nl"* | *'*'* | *'?'* | *'['*)

echo "$0: invalid mode: $mode" >&2

exit 1;;

esac

shift;;

-o) chowncmd="$chownprog $2"

shift;;

-s) stripcmd=$stripprog;;

-t)

is_target_a_directory=always

dst_arg=$2

# Protect names problematic for 'test' and other utilities.

case $dst_arg in

-* | [=!]) dst_arg=./$dst_arg;;

esac

shift;;

-T) is_target_a_directory=never;;

--version) echo "$0 $scriptversion"; exit $?;;

--) shift

break;;

-*) echo "$0: invalid option: $1" >&2

exit 1;;

*) break;;

esac

shift

done

# We allow the use of options -d and -T together, by making -d

# take the precedence; this is for compatibility with GNU install.

if test -n "$dir_arg"; then

if test -n "$dst_arg"; then

echo "$0: target directory not allowed when installing a directory." >&2

exit 1

if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then

# When -d is used, all remaining arguments are directories to create.

# When -t is used, the destination is already specified.

# Otherwise, the last argument is the destination. Remove it from $@.

for arg

if test -n "$dst_arg"; then

# $@ is not empty: it contains at least $arg.

set fnord "$@" "$dst_arg"

shift # fnord

shift # arg

dst_arg=$arg

# Protect names problematic for 'test' and other utilities.

case $dst_arg in

-* | [=!]) dst_arg=./$dst_arg;;

esac

done

if test $# -eq 0; then

if test -z "$dir_arg"; then

echo "$0: no input file specified." >&2

exit 1

# It's OK to call 'install-sh -d' without argument.

# This can happen when creating conditional directories.

exit 0

if test -z "$dir_arg"; then

if test $# -gt 1 || test "$is_target_a_directory" = always; then

if test ! -d "$dst_arg"; then

echo "$0: $dst_arg: Is not a directory." >&2

exit 1

if test -z "$dir_arg"; then

do_exit='(exit $ret); exit $ret'

trap "ret=129; $do_exit" 1

trap "ret=130; $do_exit" 2

trap "ret=141; $do_exit" 13

trap "ret=143; $do_exit" 15

# Set umask so as not to create temps with too-generous modes.

# However, 'strip' requires both read and write access to temps.

case $mode in

# Optimize common cases.

*644) cp_umask=133;;

*755) cp_umask=22;;

*[0-7])

if test -z "$stripcmd"; then

u_plus_rw=

else

u_plus_rw='% 200'

cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;

if test -z "$stripcmd"; then

u_plus_rw=

else

u_plus_rw=,u+rw

cp_umask=$mode$u_plus_rw;;

esac

for src

# Protect names problematic for 'test' and other utilities.

case $src in

-* | [=!]) src=./$src;;

esac

if test -n "$dir_arg"; then

dst=$src

dstdir=$dst

test -d "$dstdir"

dstdir_status=$?

else

# Waiting for this to be detected by the "$cpprog $src $dsttmp" command

# might cause directories to be created, which would be especially bad

# if $src (and thus $dsttmp) contains '*'.

if test ! -f "$src" && test ! -d "$src"; then

echo "$0: $src does not exist." >&2

exit 1

if test -z "$dst_arg"; then

echo "$0: no destination specified." >&2

exit 1

dst=$dst_arg

# If destination is a directory, append the input filename.

if test -d "$dst"; then

if test "$is_target_a_directory" = never; then

echo "$0: $dst_arg: Is a directory" >&2

exit 1

dstdir=$dst

dstbase=`basename "$src"`

case $dst in

*/) dst=$dst$dstbase;;

*) dst=$dst/$dstbase;;

esac

dstdir_status=0

else

dstdir=`dirname "$dst"`

test -d "$dstdir"

dstdir_status=$?

case $dstdir in

*/) dstdirslash=$dstdir;;

*) dstdirslash=$dstdir/;;

esac

obsolete_mkdir_used=false

if test $dstdir_status != 0; then

case $posix_mkdir in

'')

# Create intermediate dirs using mode 755 as modified by the umask.

# This is like FreeBSD 'install' as of 1997-10-28.

umask=`umask`

case $stripcmd.$umask in

# Optimize common cases.

*[2367][2367]) mkdir_umask=$umask;;

.*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;

*[0-7])

mkdir_umask=`expr $umask + 22 \

- $umask % 100 % 40 + $umask % 20 \

- $umask % 10 % 4 + $umask % 2

`;;

*) mkdir_umask=$umask,go-w;;

esac

# With -d, create the new directory with the user-specified mode.

# Otherwise, rely on $mkdir_umask.

if test -n "$dir_arg"; then

mkdir_mode=-m$mode

else

mkdir_mode=

posix_mkdir=false

case $umask in

*[123567][0-7][0-7])

# POSIX mkdir -p sets u+wx bits regardless of umask, which

# is incompatible with FreeBSD 'install' when (umask & 300) != 0.

;;

# Note that $RANDOM variable is not portable (e.g. dash); Use it

# here however when possible just to lower collision chance.

tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$

trap 'ret=$?; rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null; exit $ret' 0

# Because "mkdir -p" follows existing symlinks and we likely work

# directly in world-writeable /tmp, make sure that the '$tmpdir'

# directory is successfully created first before we actually test

# 'mkdir -p' feature.

if (umask $mkdir_umask &&

$mkdirprog $mkdir_mode "$tmpdir" &&

exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1

then

if test -z "$dir_arg" || {

# Check for POSIX incompatibilities with -m.

# HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or

# other-writable bit of parent directory when it shouldn't.

# FreeBSD 6.1 mkdir -m -p sets mode of existing directory.

test_tmpdir="$tmpdir/a"

ls_ld_tmpdir=`ls -ld "$test_tmpdir"`

case $ls_ld_tmpdir in

d????-?r-*) different_mode=700;;

d????-?--*) different_mode=755;;

*) false;;

esac &&

$mkdirprog -m$different_mode -p -- "$test_tmpdir" && {

ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`

test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"

}

then posix_mkdir=:

rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"

else

# Remove any dirs left behind by ancient mkdir implementations.

rmdir ./$mkdir_mode ./-p ./-- "$tmpdir" 2>/dev/null

trap '' 0;;

esac;;

esac

$posix_mkdir && (

umask $mkdir_umask &&

$doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"

)

then :

else

# The umask is ridiculous, or mkdir does not conform to POSIX,

# or it failed possibly due to a race condition. Create the

# directory the slow way, step by step, checking for races as we go.

case $dstdir in

/*) prefix='/';;

[-=!]*) prefix='./';;

*) prefix='';;

esac

oIFS=$IFS

IFS=/

set -f

set fnord $dstdir

shift

set +f

IFS=$oIFS

prefixes=

for d

test X"$d" = X && continue

prefix=$prefix$d

if test -d "$prefix"; then

prefixes=

else

if $posix_mkdir; then

(umask=$mkdir_umask &&

$doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break

# Don't fail if two instances are running concurrently.

test -d "$prefix" || exit 1

else

case $prefix in

*\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;

*) qprefix=$prefix;;

esac

prefixes="$prefixes '$qprefix'"

prefix=$prefix/

done

if test -n "$prefixes"; then

# Don't fail if two instances are running concurrently.

(umask $mkdir_umask &&

eval "\$doit_exec \$mkdirprog $prefixes") ||

test -d "$dstdir" || exit 1

obsolete_mkdir_used=true

if test -n "$dir_arg"; then

{ test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&

{ test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&

{ test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||

test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1

else

# Make a couple of temp file names in the proper directory.

dsttmp=${dstdirslash}_inst.$$_

rmtmp=${dstdirslash}_rm.$$_

# Trap to clean up those temp files at exit.

trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0

# Copy the file name to the temp name.

(umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") &&

# and set any options; do chmod last to preserve setuid bits.

# If any of these fail, we abort the whole thing. If we want to

# ignore errors from any of these, just make sure not to ignore

# errors from the above "$doit $cpprog $src $dsttmp" command.

{ test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&

{ test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&

{ test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&

{ test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&

# If -C, don't bother to copy if it wouldn't change the file.

if $copy_on_change &&

old=`LC_ALL=C ls -dlL "$dst" 2>/dev/null` &&

new=`LC_ALL=C ls -dlL "$dsttmp" 2>/dev/null` &&

set -f &&

set X $old && old=:$2:$4:$5:$6 &&

set X $new && new=:$2:$4:$5:$6 &&

set +f &&

test "$old" = "$new" &&

$cmpprog "$dst" "$dsttmp" >/dev/null 2>&1

then

rm -f "$dsttmp"

else

# Rename the file to the real destination.

$doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||

# The rename failed, perhaps because mv can't rename something else

# to itself, or perhaps because mv is so ancient that it does not

# support -f.

{

# Now remove or move aside any old file at destination location.

# We try this two ways since rm can't unlink itself on some

# systems and the destination file might be busy for other

# reasons. In this case, the final cleanup might fail but the new

# file should still install successfully.

{

test ! -f "$dst" ||

$doit $rmcmd -f "$dst" 2>/dev/null ||

{ $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&

{ $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }

} ||

{ echo "$0: cannot unlink or rename $dst" >&2

(exit 1); exit 1

}

} &&

# Now rename the file to the real destination.

$doit $mvcmd "$dsttmp" "$dst"

}

fi || exit 1

trap '' 0

done

# Local variables:

# eval: (add-hook 'before-save-hook 'time-stamp)

# time-stamp-start: "scriptversion="

# time-stamp-format: "%:y-%02m-%02d.%02H"

# time-stamp-time-zone: "UTC0"

# time-stamp-end: "; # UTC"

# End:

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