2
# Derive #define directives from specially formatted `case ...:' statements.
2
# Derive #define directives from specially formatted 'case ...:' statements.
4
# Copyright (C) 2003, 2005, 2009-2011 Free Software Foundation, Inc.
4
# Copyright (C) 2003-2012 Free Software Foundation, Inc.
6
6
# This program is free software: you can redistribute it and/or modify
7
7
# it under the terms of the GNU General Public License as published by
68
Derive #define directives from specially formatted `case ...:' statements.
68
There are two modes of operation, the default, which is to emit
69
#define directives derived from specially formatted 'case' statements,
70
and that with --local, which is to emit a static inline function
71
mapping S_MAGIC_* values to 1, 0, -1, corresponding to known-local,
72
known-remote/distributed/network and unknown, respectively.
70
--help display this help and exit
71
--version output version information and exit
74
--local emit an is_local_fs_type function
75
--help display this help and exit
76
--version output version information and exit
94
103
my $file = $ARGV[0];
97
or die "$ME: can't open `$file' for reading: $!\n";
106
or die "$ME: can't open '$file' for reading: $!\n";
99
108
# For each line like this:
100
109
# case S_MAGIC_ROMFS: /* 0x7275 */
101
110
# emit one like this:
102
111
# # define S_MAGIC_ROMFS 0x7275
103
# Fail if there is a `case S_MAGIC_.*' line without
112
# Fail if there is a 'case S_MAGIC_.*' line without
104
113
# a properly formed comment.
115
my $map_comment = <<EOF;
116
/* Map each S_MAGIC_* value to 1, 0 or -1.
117
1 if it is known to be a remote file system type,
118
0 if it is known to be a local file system type, or -1 otherwise. */
120
my $magic_comment = <<EOF;
107
121
/* Define the magic numbers as given by statfs(2).
108
122
Please send additions to bug-coreutils\@gnu.org and meskes\@debian.org.
109
123
This file is generated automatically from $file. */
111
#if defined __linux__
125
print $emit_magic ? $magic_comment : $map_comment;
128
and print "\n#if defined __linux__\n";
130
or print "static inline int\n"
131
. "is_local_fs_type (unsigned long int magic)\n"
132
. "{\n switch (magic)\n {\n";
114
134
while (defined (my $line = <FH>))
116
136
$line =~ /^[ \t]+case S_MAGIC_/
118
$line =~ m!^[ \t]+case (S_MAGIC_\w+): /\* (0x[0-9A-Fa-f]+) \*/$!
139
m!^[ \t]+case (S_MAGIC_\w+): /\* (0x[0-9A-Fa-f]+) (local|remote) \*/!
119
140
or (warn "$ME:$file:$.: malformed case S_MAGIC_... line"),
123
print "# define $name $value\n";
144
my $local = $3 eq 'local' ? 1 : 0;
146
? "# define $name $magic\n"
147
: " case $name: return $local;\n";
127
152
#elif defined __GNU__
128
153
# include <hurd/hurd_types.h>
157
or printf " default: return -1;\n }\n}\n";