document mingw linker fix and close associated bug

[debian/gzip] / zgrep.in

diff --git a/zgrep.in b/zgrep.in
index 154d17f4cea73a20179fdcb86a014fc670a9a465..3efdb529b8f7dc384a001562ca13261183d70d8d 100644 (file)
--- a/zgrep.in
+++ b/zgrep.in
@@ -3,8 +3,8 @@
 # zgrep -- a wrapper around a grep program that decompresses files as needed
 # Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
 
-# Copyright (C) 1998, 2001, 2002, 2006, 2007, 2009, 2010 Free Software
-# Foundation
+# Copyright (C) 1998, 2001-2002, 2006-2007, 2009-2018 Free Software Foundation,
+# Inc.
 
 # Copyright (C) 1993 Jean-loup Gailly
 
@@ -22,18 +22,12 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
-bindir=@bindir@
-case $1 in
---__bindir) bindir=${2?}; shift; shift;;
-esac
-PATH=$bindir:$PATH
-
 grep='${GREP-'\''@GREP@'\''}'
 
 version='zgrep (gzip) @VERSION@
-Copyright (C) 2010-2013 Free Software Foundation, Inc.
+Copyright (C) 2010-2018 Free Software Foundation, Inc.
 This is free software.  You may redistribute copies of it under the terms of
-the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
+the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.
 There is NO WARRANTY, to the extent permitted by law.
 
 Written by Jean-loup Gailly.'
@@ -42,7 +36,10 @@ usage="Usage: $0 [OPTION]... [-e] PATTERN [FILE]...
 Look for instances of PATTERN in the input FILEs, using their
 uncompressed contents if they are compressed.
 
-OPTIONs are the same as for 'grep'.
+OPTIONs are the same as for 'grep', except that the following 'grep'
+options are not supported: --dereference-recursive (-R), --directories (-d),
+--exclude, --exclude-from, --exclude-dir, --include, --null (-Z),
+--null-data (-z), and --recursive (-r).
 
 Report bugs to <bug-gzip@gnu.org>."
 
@@ -58,6 +55,7 @@ files_with_matches=0
 files_without_matches=0
 no_filename=0
 with_filename=0
+pattmp=
 
 while test $# -ne 0; do
   option=$1
@@ -116,16 +114,42 @@ while test $# -ne 0; do
     # The pattern is coming from a file rather than the command-line.
     # If the file is actually stdin then we need to do a little
     # magic, since we use stdin to pass the gzip output to grep.
-    # Turn the -f option into an -e option by copying the file's
-    # contents into OPTARG.
-    case $optarg in
-    (" '-'" | " '/dev/stdin'" | " '/dev/fd/0'")
-      option=-e
-      optarg=" '"$(sed "$escape") || exit 2;;
-    esac
+    # Similarly if it is not a regular file, since it might be read repeatedly.
+    # In either of these two cases, copy the pattern into a temporary file,
+    # and use that file instead.  The pattern might contain null bytes,
+    # so we cannot simply switch to -e here.
+    if case $optarg in
+       (" '-'" | " '/dev/stdin'" | " '/dev/fd/0'")
+         :;;
+       (*)
+         eval "test ! -f$optarg";;
+       esac
+    then
+      if test -n "$pattmp"; then
+        eval "cat --$optarg" >>"$pattmp" || exit 2
+        continue
+      fi
+      trap '
+        test -n "$pattmp" && rm -f "$pattmp"
+        (exit 2); exit 2
+      ' HUP INT PIPE TERM 0
+      case $TMPDIR in
+        / | /*/) ;;
+        /*) TMPDIR=$TMPDIR/;;
+        *) TMPDIR=/tmp/;;
+      esac
+      if type mktemp >/dev/null 2>&1; then
+        pattmp=$(mktemp "${TMPDIR}zgrepXXXXXXXXX") || exit 2
+      else
+        set -C
+        pattmp=${TMPDIR}zgrep$$
+      fi
+      eval "cat --$optarg" >"$pattmp" || exit 2
+      optarg=' "$pattmp"'
+    fi
     have_pat=1;;
   (--h | --he | --hel | --help)
-    echo "$usage" || exit 2
+    printf '%s\n' "$usage" || exit 2
     exit;;
   (-H | --wi | --wit | --with | --with- | --with-f | --with-fi \
   | --with-fil | --with-file | --with-filen | --with-filena | --with-filenam \
@@ -139,7 +163,7 @@ while test $# -ne 0; do
   (-h | --no-f*)
     no_filename=1;;
   (-V | --v | --ve | --ver | --vers | --versi | --versio | --version)
-    echo "$version" || exit 2
+    printf '%s\n' "$version" || exit 2
     exit;;
   esac
 
@@ -170,7 +194,7 @@ if test $# -eq 0; then
 fi
 
 exec 3>&1
-res=0
+res=1
 
 for i
 do
@@ -186,6 +210,7 @@ do
         if test $r -eq 1; then
           printf '%s\n' "$i" || r=2
         fi
+        test 256 -le $r && r=$(expr 128 + $r % 128)
         exit $r
       }
     elif test $with_filename -eq 0 &&
@@ -208,14 +233,40 @@ do
       r=$(
         exec 4>&1
         (eval "$grep" 4>&-; echo $? >&4) 3>&- | sed "$sed_script" >&3 4>&-
-      ) && exit $r
-      r=$?
-      test 1 -lt $r && exit $r || exit 2
+      ) || { r=$?; test $r -lt 2 && r=2; }
+      test 256 -le $r && r=$(expr 128 + $r % 128)
+      exit $r
     fi >&3 5>&-
   )
   r=$?
-  test 128 -lt $r && exit $r
-  test "$gzip_status" -eq 0 || test "$gzip_status" -eq 2 || r=2
-  test $res -lt $r && res=$r
+
+  # Ignore gzip status 2, as it is just a warning.
+  # gzip status 1 is an error, like grep status 2.
+  test $gzip_status -eq 2 && gzip_status=0
+  test $gzip_status -eq 1 && gzip_status=2
+
+  # Use the more serious of the grep and gzip statuses.
+  test $r -lt $gzip_status && r=$gzip_status
+
+  # Accumulate the greatest status, except consider 0 to be greater than 1.
+  if test $r -le 1 && test $res -le 1; then
+     test $r -lt $res
+  else
+     test $res -lt $r
+  fi && res=$r
+
+  # Exit immediately on a serious error.
+  test 126 -le $res && break
 done
+
+if test -n "$pattmp"; then
+  rm -f "$pattmp" || {
+    r=$?
+    test $r -lt 2 && r=2
+    test $res -lt $r && res=$r
+  }
+  trap - HUP INT PIPE TERM 0
+fi
+
+test 128 -le $res && kill -$(expr $res % 128) $$
 exit $res