/usr/bin/ifnames-dickey is in autoconf-dickey 2.52+20170501-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 | #! /bin/sh
# -*- shell-script -*-
# ifnames - print the identifiers used in C preprocessor conditionals
# Copyright 1994, 1995, 1999, 2000 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
# Reads from stdin if no files are given.
# Writes to stdout.
# Written by David MacKenzie <djm@gnu.ai.mit.edu>
# and Paul Eggert <eggert@twinsun.com>.
me=`echo "$0" | sed -e 's,.*/,,'`
usage="\
Usage: $0 [OPTION] ... [FILE] ...
Scan all of the C source FILES (or the standard input, if none are
given) and write to the standard output a sorted list of all the
identifiers that appear in those files in \`#if', \`#elif', \`#ifdef', or
\`#ifndef' directives. Print each identifier on a line, followed by a
space-separated list of the files in which that identifier occurs.
-h, --help print this help, then exit
-V, --version print version number, then exit
Report bugs to <dickey@invisible-island.net>."
version="\
ifnames (GNU Autoconf) 2.52.20170501
Written by David J. MacKenzie and Paul Eggert.
Copyright 1994, 1995, 1999, 2000 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
help="\
Try \`$me --help' for more information."
while test $# -gt 0; do
case "$1" in
--help | -h )
echo "$usage"; exit 0 ;;
--version | -V )
echo "$version"; exit 0 ;;
--) # Stop option processing.
shift; break ;;
-*)
exec >&2
echo "$me: invalid option $1"
echo "$help"
exit 1 ;;
*) break ;;
esac
done
# Variables.
: ${AWK=awk}
$AWK '
# Record that sym was found in FILENAME.
function file_sym(sym, i, fs)
{
if (sym ~ /^[A-Za-z_]/)
{
if (!found[sym,FILENAME])
{
found[sym,FILENAME] = 1
# Insert FILENAME into files[sym], keeping the list sorted.
i = 1
fs = files[sym]
while (match(substr(fs, i), /^ [^ ]*/) \
&& substr(fs, i + 1, RLENGTH - 1) < FILENAME)
{
i += RLENGTH
}
files[sym] = substr(fs, 1, i - 1) " " FILENAME substr(fs, i)
}
}
}
{
while (sub(/\\$/, "", $0) > 0)
{
if ((getline tmp) > 0)
$0 = $0 tmp
else
break
}
}
/^[\t ]*#/ {
if (sub(/^[\t ]*#[\t ]*ifn?def[\t ]+/, "", $0))
{
sub(/[^A-Za-z_0-9].*/, "", $0)
file_sym($0)
}
if (sub(/^[\t ]*#[\t ]*(el)?if[\t ]+/, "", $0))
{
# Remove comments. Not perfect, but close enough.
gsub(/\/\*[^\/]*(\*\/)?/, "", $0)
for (i = split($0, field, /[^A-Za-z_0-9]+/); 1 <= i; i--)
{
if (field[i] != "defined")
{
file_sym(field[i])
}
}
}
}
END {
for (sym in files)
{
print sym files[sym]
}
}
' ${1+"$@"} | sort
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