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Annotation of src/usr.bin/compress/zdiff, Revision 1.2

1.1       millert     1: #!/bin/sh -
                      2: #
1.2     ! otto        3: # $OpenBSD$
        !             4: #
1.1       millert     5: # Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
                      6: #
                      7: # Permission to use, copy, modify, and distribute this software for any
                      8: # purpose with or without fee is hereby granted, provided that the above
                      9: # copyright notice and this permission notice appear in all copies.
                     10: #
                     11: # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     12: # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     13: # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     14: # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     15: # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     16: # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     17: # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     18: #
                     19: # Sponsored in part by the Defense Advanced Research Projects
                     20: # Agency (DARPA) and Air Force Research Laboratory, Air Force
                     21: # Materiel Command, USAF, under agreement number F39502-99-1-0512.
                     22: #
                     23:
                     24: # Set $prog based on $0
                     25: case $0 in
                     26:        *cmp)   prog=cmp
                     27:                ;;
                     28:        *)      prog=diff
                     29:                ;;
                     30: esac
                     31: USAGE="usage: z$prog [options] file1 [file2]"
                     32:
                     33: # Pull out any command line flags so we can pass them to diff/cmp
                     34: # XXX - assumes there is no optarg
                     35: flags=
                     36: while test $# -ne 0; do
                     37:        case "$1" in
                     38:                --)
                     39:                        shift
                     40:                        break
                     41:                        ;;
                     42:                -*)
                     43:                        flags="$flags $1"
                     44:                        shift
                     45:                        ;;
                     46:                *)
                     47:                        break
                     48:                        ;;
                     49:        esac
                     50: done
                     51:
                     52: if [ $# -eq 1 ]; then
                     53:        # One file given, compare compressed to uncompressed
                     54:        files="$1"
                     55:        case "$1" in
                     56:                *[._-][Zz])
                     57:                        files="${1%??}"
                     58:                        ;;
                     59:                *[._-]gz)
                     60:                        files="${1%???}"
                     61:                        ;;
                     62:                *.t[ag]z)
                     63:                        files="${1%??}"ar
                     64:                        ;;
                     65:                *)      echo "z$prog: unknown suffix" 1>&2
                     66:                        exit 1
                     67:        esac
                     68:        compress -cdfq "$1" | $prog $flags - "$files"
                     69:        status=$?
                     70: elif [ $# -eq 2 ]; then
                     71:        # Two files given, compare the two uncompressing as needed
                     72:        case "$1" in
                     73:                *[._-][Zz]|*[._-]gz|*.t[ag]z)
                     74:                        files=-
                     75:                        filt="compress -cdfq $1"
                     76:                        ;;
                     77:                *)
                     78:                        files="$1"
                     79:                        ;;
                     80:        esac
                     81:        case "$2" in
                     82:                *[._-][Zz]|*[._-]gz|*.t[ag]z)
                     83:                        if [ "$files" = "-" ]; then
                     84:                                tmp=`mktemp -t z$prog.XXXXXXXXXX` || exit 1
                     85:                                trap "rm -f $tmp" 0 1 2 3 13 15
                     86:                                compress -cdfq "$2" > $tmp
                     87:                                files="$files $tmp"
                     88:                        else
                     89:                                files="$files -"
                     90:                                filt="compress -cdfq $2"
                     91:                        fi
                     92:                        ;;
                     93:                *)
                     94:                        files="$files $2"
                     95:                        ;;
                     96:        esac
                     97:        if [ -n "$filt" ]; then
                     98:                $filt | $prog $flags $files
                     99:        else
                    100:                $prog $flags $files
                    101:        fi
                    102:        status=$?
                    103: else
                    104:        echo "$USAGE" 1>&2
                    105:        exit 1
                    106: fi
                    107:
                    108: exit $status