1 #!/bin/sh 2 # Like mv $1 $2, but if the files are the same, just delete $1. 3 # Status is zero if successful, nonzero otherwise. 4 5 VERSION='2012-01-06 07:23'; # UTC 6 # The definition above must lie within the first 8 lines in order 7 # for the Emacs time-stamp write hook (at end) to update it. 8 # If you change this file with Emacs, please let the write hook 9 # do its job. Otherwise, update this string manually. 10 11 # Copyright (C) 2002-2014 Free Software Foundation, Inc. 12 13 # This program is free software: you can redistribute it and/or modify 14 # it under the terms of the GNU General Public License as published by 15 # the Free Software Foundation, either version 3 of the License, or 16 # (at your option) any later version. 17 18 # This program is distributed in the hope that it will be useful, 19 # but WITHOUT ANY WARRANTY; without even the implied warranty of 20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 # GNU General Public License for more details. 22 23 # You should have received a copy of the GNU General Public License 24 # along with this program. If not, see <http://www.gnu.org/licenses/>. 25 26 usage="usage: $0 SOURCE DEST" 27 28 help="$usage 29 or: $0 OPTION 30 If SOURCE is different than DEST, then move it to DEST; else remove SOURCE. 31 32 --help display this help and exit 33 --version output version information and exit 34 35 The variable CMPPROG can be used to specify an alternative to 'cmp'. 36 37 Report bugs to <bug-gnulib (at] gnu.org>." 38 39 version=`expr "$VERSION" : '\([^ ]*\)'` 40 version="move-if-change (gnulib) $version 41 Copyright (C) 2011 Free Software Foundation, Inc. 42 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 43 This is free software: you are free to change and redistribute it. 44 There is NO WARRANTY, to the extent permitted by law." 45 46 cmpprog=${CMPPROG-cmp} 47 48 for arg 49 do 50 case $arg in 51 --help | --hel | --he | --h) 52 exec echo "$help" ;; 53 --version | --versio | --versi | --vers | --ver | --ve | --v) 54 exec echo "$version" ;; 55 --) 56 shift 57 break ;; 58 -*) 59 echo "$0: invalid option: $arg" >&2 60 exit 1 ;; 61 *) 62 break ;; 63 esac 64 done 65 66 test $# -eq 2 || { echo "$0: $usage" >&2; exit 1; } 67 68 if test -r "$2" && $cmpprog -- "$1" "$2" >/dev/null; then 69 rm -f -- "$1" 70 else 71 if mv -f -- "$1" "$2"; then :; else 72 # Ignore failure due to a concurrent move-if-change. 73 test -r "$2" && $cmpprog -- "$1" "$2" >/dev/null && rm -f -- "$1" 74 fi 75 fi 76 77 ## Local Variables: 78 ## eval: (add-hook 'write-file-hooks 'time-stamp) 79 ## time-stamp-start: "VERSION='" 80 ## time-stamp-format: "%:y-%02m-%02d %02H:%02M" 81 ## time-stamp-time-zone: "UTC" 82 ## time-stamp-end: "'; # UTC" 83 ## End: 84
