| #!/bin/sh |
| # |
| # This is an actually-safe install command which installs the new |
| # file atomically in the new location, rather than overwriting |
| # existing files. |
| # |
| |
| usage() { |
| printf "usage: %s [-D] [-l] [-m mode] src dest\n" "$0" 1>&2 |
| exit 1 |
| } |
| |
| mkdirp= |
| symlink= |
| mode=755 |
| |
| while getopts Dlm: name ; do |
| case "$name" in |
| D) mkdirp=yes ;; |
| l) symlink=yes ;; |
| m) mode=$OPTARG ;; |
| ?) usage ;; |
| esac |
| done |
| shift $(($OPTIND - 1)) |
| |
| test "$#" -eq 2 || usage |
| src=$1 |
| dst=$2 |
| tmp="$dst.tmp.$$" |
| |
| case "$dst" in |
| */) printf "%s: %s ends in /\n", "$0" "$dst" 1>&2 ; exit 1 ;; |
| esac |
| |
| set -C |
| set -e |
| |
| if test "$mkdirp" ; then |
| umask 022 |
| case "$2" in |
| */*) mkdir -p "${dst%/*}" ;; |
| esac |
| fi |
| |
| trap 'rm -f "$tmp"' EXIT INT QUIT TERM HUP |
| |
| umask 077 |
| |
| if test "$symlink" ; then |
| ln -s "$1" "$tmp" |
| else |
| cat < "$1" > "$tmp" |
| chmod "$mode" "$tmp" |
| fi |
| |
| mv -f "$tmp" "$2" |
| test -d "$2" && { |
| rm -f "$2/$tmp" |
| printf "%s: %s is a directory\n" "$0" "$dst" 1>&2 |
| exit 1 |
| } |
| |
| exit 0 |
