| 1 | #!/bin/sh
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| 2 | # Like mv $1 $2, but if the files are the same, just delete $1.
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| 3 | # Status is zero if successful, nonzero otherwise.
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| 4 |
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| 5 | VERSION='2012-01-06 07:23'; # UTC
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| 6 | # The definition above must lie within the first 8 lines in order
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| 7 | # for the Emacs time-stamp write hook (at end) to update it.
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| 8 | # If you change this file with Emacs, please let the write hook
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| 9 | # do its job. Otherwise, update this string manually.
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| 10 |
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| 11 | # Copyright (C) 2002-2014 Free Software Foundation, Inc.
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| 12 |
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| 13 | # This program is free software: you can redistribute it and/or modify
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| 14 | # it under the terms of the GNU General Public License as published by
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| 15 | # the Free Software Foundation, either version 3 of the License, or
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| 16 | # (at your option) any later version.
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| 17 |
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| 18 | # This program is distributed in the hope that it will be useful,
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| 19 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 20 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 21 | # GNU General Public License for more details.
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| 22 |
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| 23 | # You should have received a copy of the GNU General Public License
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| 24 | # along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 25 |
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| 26 | usage="usage: $0 SOURCE DEST"
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| 27 |
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| 28 | help="$usage
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| 29 | or: $0 OPTION
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| 30 | If SOURCE is different than DEST, then move it to DEST; else remove SOURCE.
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| 31 |
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| 32 | --help display this help and exit
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| 33 | --version output version information and exit
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| 34 |
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| 35 | The variable CMPPROG can be used to specify an alternative to 'cmp'.
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| 36 |
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| 37 | Report bugs to <bug-gnulib@gnu.org>."
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| 38 |
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| 39 | version=`expr "$VERSION" : '\([^ ]*\)'`
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| 40 | version="move-if-change (gnulib) $version
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| 41 | Copyright (C) 2011 Free Software Foundation, Inc.
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| 42 | License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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| 43 | This is free software: you are free to change and redistribute it.
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| 44 | There is NO WARRANTY, to the extent permitted by law."
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| 45 |
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| 46 | cmpprog=${CMPPROG-cmp}
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| 47 |
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| 48 | for arg
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| 49 | do
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| 50 | case $arg in
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| 51 | --help | --hel | --he | --h)
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| 52 | exec echo "$help" ;;
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| 53 | --version | --versio | --versi | --vers | --ver | --ve | --v)
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| 54 | exec echo "$version" ;;
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| 55 | --)
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| 56 | shift
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| 57 | break ;;
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| 58 | -*)
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| 59 | echo "$0: invalid option: $arg" >&2
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| 60 | exit 1 ;;
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| 61 | *)
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| 62 | break ;;
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| 63 | esac
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| 64 | done
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| 65 |
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| 66 | test $# -eq 2 || { echo "$0: $usage" >&2; exit 1; }
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| 67 |
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| 68 | if test -r "$2" && $cmpprog -- "$1" "$2" >/dev/null; then
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| 69 | rm -f -- "$1"
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| 70 | else
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| 71 | if mv -f -- "$1" "$2"; then :; else
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| 72 | # Ignore failure due to a concurrent move-if-change.
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| 73 | test -r "$2" && $cmpprog -- "$1" "$2" >/dev/null && rm -f -- "$1"
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| 74 | fi
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| 75 | fi
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| 76 |
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| 77 | ## Local Variables:
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| 78 | ## eval: (add-hook 'write-file-hooks 'time-stamp)
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| 79 | ## time-stamp-start: "VERSION='"
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| 80 | ## time-stamp-format: "%:y-%02m-%02d %02H:%02M"
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| 81 | ## time-stamp-time-zone: "UTC"
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| 82 | ## time-stamp-end: "'; # UTC"
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| 83 | ## End:
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