zstdgrep

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    1 #!/bin/sh
    2 #
    3 # Copyright (c) 2003 Thomas Klausner.
    4 #
    5 # Redistribution and use in source and binary forms, with or without
    6 # modification, are permitted provided that the following conditions
    7 # are met:
    8 # 1. Redistributions of source code must retain the above copyright
    9 #    notice, this list of conditions and the following disclaimer.
   10 # 2. Redistributions in binary form must reproduce the above copyright
   11 #    notice, this list of conditions and the following disclaimer in the
   12 #    documentation and/or other materials provided with the distribution.
   13 #
   14 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   15 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   18 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   19 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   20 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   21 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   22 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   23 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24 
   25 grep=${GREP:-grep}
   26 zcat=${ZCAT:-zstdcat}
   27 
   28 endofopts=0
   29 pattern_found=0
   30 grep_args=""
   31 hyphen=0
   32 silent=0
   33 
   34 prog=${0##*/}
   35 
   36 # handle being called 'zegrep' or 'zfgrep'
   37 case $prog in
   38     *egrep*) prog=zegrep; grep_args='-E';;
   39     *fgrep*) prog=zfgrep; grep_args='-F';;
   40     *)       prog=zstdgrep;;
   41 esac
   42 
   43 # skip all options and pass them on to grep taking care of options
   44 # with arguments, and if -e was supplied
   45 
   46 while [ "$#" -gt 0 ] && [ "${endofopts}" -eq 0 ]; do
   47     case "$1" in
   48     # from GNU grep-2.5.1 -- keep in sync!
   49         -[ABCDXdefm])
   50             if [ "$#" -lt 2 ]; then
   51                 printf '%s: missing argument for %s flag\n' "${prog}" "$1" >&2
   52                 exit 1
   53             fi
   54             case "$1" in
   55                 -e)
   56                     pattern="$2"
   57                     pattern_found=1
   58                     shift 2
   59                     break
   60                     ;;
   61                 -f)
   62                     pattern_found=2
   63                     ;;
   64                 *)
   65                     ;;
   66             esac
   67             grep_args="${grep_args} $1 $2"
   68             shift 2
   69             ;;
   70         --)
   71             shift
   72             endofopts=1
   73             ;;
   74         -)
   75             hyphen=1
   76             shift
   77             ;;
   78         -h)
   79             silent=1
   80             shift
   81             ;;
   82         -*)
   83             grep_args="${grep_args} $1"
   84             shift
   85             ;;
   86         *)
   87             # pattern to grep for
   88             endofopts=1
   89             ;;
   90     esac
   91 done
   92 
   93 # if no -e option was found, take next argument as grep-pattern
   94 if [ "${pattern_found}" -lt 1 ]; then
   95     if [ "$#" -ge 1 ]; then
   96         pattern="$1"
   97         shift
   98     elif [ "${hyphen}" -gt 0 ]; then
   99         pattern="-"
  100     else
  101         printf '%s: missing pattern\n' "${prog}" >&2
  102         exit 1
  103     fi
  104 fi
  105 
  106 EXIT_CODE=0
  107 # call grep ...
  108 if [ "$#" -lt 1 ]; then
  109     # ... on stdin
  110     set -f # Disable file name generation (globbing).
  111     # shellcheck disable=SC2086
  112     "${zcat}" - | "${grep}" ${grep_args} -- "${pattern}" -
  113     EXIT_CODE=$?
  114     set +f
  115 else
  116     # ... on all files given on the command line
  117     if [ "${silent}" -lt 1 ] && [ "$#" -gt 1 ]; then
  118         grep_args="-H ${grep_args}"
  119     fi
  120     set -f
  121     while [ "$#" -gt 0 ]; do
  122         # shellcheck disable=SC2086
  123         if [ $pattern_found -eq 2 ]; then
  124             "${zcat}" -- "$1" | "${grep}" --label="${1}" ${grep_args} -- -
  125         else
  126             "${zcat}" -- "$1" | "${grep}" --label="${1}" ${grep_args} -- "${pattern}" -
  127         fi
  128         [ "$?" -ne 0 ] && EXIT_CODE=1
  129         shift
  130     done
  131     set +f
  132 fi
  133 
  134 exit "${EXIT_CODE}"

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FreeBSD/Linux Kernel Cross Reference sys/contrib/zstd/programs/zstdgrep

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sys/contrib/zstd/programs/zstdgrep