1#!/usr/bin/perl -w 2# Derive #define directives from specially formatted `case ...:' statements. 3 4# Copyright (C) 2003, 2005, 2009-2010 Free Software Foundation, Inc. 5 6# This program is free software: you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation, either version 3 of the License, or 9# (at your option) any later version. 10 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15 16# You should have received a copy of the GNU General Public License 17# along with this program. If not, see <http://www.gnu.org/licenses/>. 18 19use strict; 20 21use Getopt::Long; 22 23(my $VERSION = '$Revision: 1.5 $ ') =~ tr/[0-9].//cd; 24(my $ME = $0) =~ s|.*/||; 25 26END 27{ 28 # Nobody ever checks the status of print()s. That's okay, because 29 # if any do fail, we're guaranteed to get an indicator when we close() 30 # the filehandle. 31 # 32 # Close stdout now, and if there were no errors, return happy status. 33 # If stdout has already been closed by the script, though, do nothing. 34 defined fileno STDOUT 35 or return; 36 close STDOUT 37 and return; 38 39 # Errors closing stdout. Indicate that, and hope stderr is OK. 40 warn "$ME: closing standard output: $!\n"; 41 42 # Don't be so arrogant as to assume that we're the first END handler 43 # defined, and thus the last one invoked. There may be others yet 44 # to come. $? will be passed on to them, and to the final _exit(). 45 # 46 # If it isn't already an error, make it one (and if it _is_ an error, 47 # preserve the value: it might be important). 48 $? ||= 1; 49} 50 51sub usage ($) 52{ 53 my ($exit_code) = @_; 54 my $STREAM = ($exit_code == 0 ? *STDOUT : *STDERR); 55 if ($exit_code != 0) 56 { 57 print $STREAM "Try `$ME --help' for more information.\n"; 58 } 59 else 60 { 61 print $STREAM <<EOF; 62Usage: $ME [OPTIONS] FILE 63 64FIXME: describe 65 66OPTIONS: 67 68 Derive #define directives from specially formatted `case ...:' statements. 69 70 --help display this help and exit 71 --version output version information and exit 72 73EOF 74 } 75 exit $exit_code; 76} 77 78{ 79 GetOptions 80 ( 81 help => sub { usage 0 }, 82 version => sub { print "$ME version $VERSION\n"; exit }, 83 ) or usage 1; 84 85 my $fail = 0; 86 87 @ARGV < 1 88 and (warn "$ME: missing FILE arguments\n"), $fail = 1; 89 1 < @ARGV 90 and (warn "$ME: too many arguments\n"), $fail = 1; 91 $fail 92 and usage 1; 93 94 my $file = $ARGV[0]; 95 96 open FH, $file 97 or die "$ME: can't open `$file' for reading: $!\n"; 98 99 # For each line like this: 100 # case S_MAGIC_ROMFS: /* 0x7275 */ 101 # emit one like this: 102 # # define S_MAGIC_ROMFS 0x7275 103 # Fail if there is a `case S_MAGIC_.*' line without 104 # a properly formed comment. 105 106 print <<EOF; 107/* Define the magic numbers as given by statfs(2). 108 Please send additions to bug-coreutils\@gnu.org and meskes\@debian.org. 109 This file is generated automatically from $file. */ 110 111#if defined __linux__ 112EOF 113 114 while (defined (my $line = <FH>)) 115 { 116 $line =~ /^[ \t]+case S_MAGIC_/ 117 or next; 118 $line =~ m!^[ \t]+case (S_MAGIC_\w+): /\* (0x[0-9A-Fa-f]+) \*/$! 119 or (warn "$ME:$file:$.: malformed case S_MAGIC_... line"), 120 $fail = 1, next; 121 my $name = $1; 122 my $value = $2; 123 print "# define $name $value\n"; 124 } 125 126 print <<\EOF; 127#elif defined __GNU__ 128# include <hurd/hurd_types.h> 129#endif 130EOF 131 close FH; 132 133 exit $fail; 134} 135