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-rwxr-xr-xsrc/zstd/programs/zstdgrep134
1 files changed, 134 insertions, 0 deletions
diff --git a/src/zstd/programs/zstdgrep b/src/zstd/programs/zstdgrep
new file mode 100755
index 000000000..61efaa947
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+++ b/src/zstd/programs/zstdgrep
@@ -0,0 +1,134 @@
+#!/bin/sh
+#
+# Copyright (c) 2003 Thomas Klausner.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+grep=${GREP:-grep}
+zcat=${ZCAT:-zstdcat}
+
+endofopts=0
+pattern_found=0
+grep_args=""
+hyphen=0
+silent=0
+
+prog=${0##*/}
+
+# handle being called 'zegrep' or 'zfgrep'
+case $prog in
+ *egrep*) prog=zegrep; grep_args='-E';;
+ *fgrep*) prog=zfgrep; grep_args='-F';;
+ *) prog=zstdgrep;;
+esac
+
+# skip all options and pass them on to grep taking care of options
+# with arguments, and if -e was supplied
+
+while [ "$#" -gt 0 ] && [ "${endofopts}" -eq 0 ]; do
+ case "$1" in
+ # from GNU grep-2.5.1 -- keep in sync!
+ -[ABCDXdefm])
+ if [ "$#" -lt 2 ]; then
+ printf '%s: missing argument for %s flag\n' "${prog}" "$1" >&2
+ exit 1
+ fi
+ case "$1" in
+ -e)
+ pattern="$2"
+ pattern_found=1
+ shift 2
+ break
+ ;;
+ -f)
+ pattern_found=2
+ ;;
+ *)
+ ;;
+ esac
+ grep_args="${grep_args} $1 $2"
+ shift 2
+ ;;
+ --)
+ shift
+ endofopts=1
+ ;;
+ -)
+ hyphen=1
+ shift
+ ;;
+ -h)
+ silent=1
+ shift
+ ;;
+ -*)
+ grep_args="${grep_args} $1"
+ shift
+ ;;
+ *)
+ # pattern to grep for
+ endofopts=1
+ ;;
+ esac
+done
+
+# if no -e option was found, take next argument as grep-pattern
+if [ "${pattern_found}" -lt 1 ]; then
+ if [ "$#" -ge 1 ]; then
+ pattern="$1"
+ shift
+ elif [ "${hyphen}" -gt 0 ]; then
+ pattern="-"
+ else
+ printf '%s: missing pattern\n' "${prog}" >&2
+ exit 1
+ fi
+fi
+
+EXIT_CODE=0
+# call grep ...
+if [ "$#" -lt 1 ]; then
+ # ... on stdin
+ set -f # Disable file name generation (globbing).
+ # shellcheck disable=SC2086
+ "${zcat}" - | "${grep}" ${grep_args} -- "${pattern}" -
+ EXIT_CODE=$?
+ set +f
+else
+ # ... on all files given on the command line
+ if [ "${silent}" -lt 1 ] && [ "$#" -gt 1 ]; then
+ grep_args="-H ${grep_args}"
+ fi
+ set -f
+ while [ "$#" -gt 0 ]; do
+ # shellcheck disable=SC2086
+ if [ $pattern_found -eq 2 ]; then
+ "${zcat}" -- "$1" | "${grep}" --label="${1}" ${grep_args} -- -
+ else
+ "${zcat}" -- "$1" | "${grep}" --label="${1}" ${grep_args} -- "${pattern}" -
+ fi
+ [ "$?" -ne 0 ] && EXIT_CODE=1
+ shift
+ done
+ set +f
+fi
+
+exit "${EXIT_CODE}"