Commit | Line | Data |
eab60bb1 |
1 | use ExtUtils::MakeMaker; |
2 | use Config; |
3 | use strict; |
4 | |
5 | use vars qw($VERSION); |
6 | |
6ad8d9a8 |
7 | $VERSION = "1.111"; |
eab60bb1 |
8 | |
9 | my %err = (); |
10 | |
11 | unlink "Errno.pm" if -f "Errno.pm"; |
12 | open OUT, ">Errno.pm" or die "Cannot open Errno.pm: $!"; |
13 | select OUT; |
14 | my $file; |
15 | foreach $file (get_files()) { |
16 | process_file($file); |
17 | } |
18 | write_errno_pm(); |
19 | unlink "errno.c" if -f "errno.c"; |
20 | |
21 | sub process_file { |
22 | my($file) = @_; |
23 | |
146174a9 |
24 | return unless defined $file and -f $file; |
eab60bb1 |
25 | |
26 | local *FH; |
27 | if (($^O eq 'VMS') && ($Config{vms_cc_type} ne 'gnuc')) { |
28 | unless(open(FH," LIBRARY/EXTRACT=ERRNO/OUTPUT=SYS\$OUTPUT $file |")) { |
29 | warn "Cannot open '$file'"; |
30 | return; |
31 | } |
32 | } else { |
33 | unless(open(FH,"< $file")) { |
def887e8 |
34 | # This file could be a temporary file created by cppstdin |
6ad8d9a8 |
35 | # so only warn under -w, and return |
36 | warn "Cannot open '$file'" if $^W; |
eab60bb1 |
37 | return; |
38 | } |
39 | } |
40 | while(<FH>) { |
41 | $err{$1} = 1 |
dcbf900d |
42 | if /^\s*#\s*define\s+(E\w+)\s+/; |
eab60bb1 |
43 | } |
44 | close(FH); |
45 | } |
46 | |
def887e8 |
47 | my $cppstdin; |
48 | |
49 | sub default_cpp { |
50 | unless (defined $cppstdin) { |
51 | use File::Spec; |
52 | $cppstdin = $Config{cppstdin}; |
53 | my $upup_cppstdin = File::Spec->catfile(File::Spec->updir, |
54 | File::Spec->updir, |
55 | "cppstdin"); |
56 | my $cppstdin_is_wrapper = |
57 | ($cppstdin eq 'cppstdin' |
58 | and -f $upup_cppstdin |
59 | and -x $upup_cppstdin); |
60 | $cppstdin = $upup_cppstdin if $cppstdin_is_wrapper; |
61 | } |
62 | return "$cppstdin $Config{cppflags} $Config{cppminus}"; |
63 | } |
64 | |
eab60bb1 |
65 | sub get_files { |
66 | my %file = (); |
67 | # VMS keeps its include files in system libraries (well, except for Gcc) |
68 | if ($^O eq 'VMS') { |
69 | if ($Config{vms_cc_type} eq 'decc') { |
70 | $file{'Sys$Library:DECC$RTLDEF.TLB'} = 1; |
71 | } elsif ($Config{vms_cc_type} eq 'vaxc') { |
72 | $file{'Sys$Library:vaxcdef.tlb'} = 1; |
73 | } elsif ($Config{vms_cc_type} eq 'gcc') { |
74 | $file{'gnu_cc_include:[000000]errno.h'} = 1; |
75 | } |
9d116dd7 |
76 | } elsif ($^O eq 'os390') { |
77 | # OS/390 C compiler doesn't generate #file or #line directives |
78 | $file{'/usr/include/errno.h'} = 1; |
092bebab |
79 | } elsif ($^O eq 'vmesa') { |
80 | # OS/390 C compiler doesn't generate #file or #line directives |
81 | $file{'../../vmesa/errno.h'} = 1; |
eab60bb1 |
82 | } else { |
83 | open(CPPI,"> errno.c") or |
84 | die "Cannot open errno.c"; |
85 | |
86 | print CPPI "#include <errno.h>\n"; |
87 | |
88 | close(CPPI); |
89 | |
90 | # invoke CPP and read the output |
6ad8d9a8 |
91 | if ($^O eq 'MSWin32') { |
92 | open(CPPO,"$Config{cpprun} $Config{cppflags} errno.c |") or |
93 | die "Cannot run '$Config{cpprun} $Config{cppflags} errno.c'"; |
94 | } else { |
def887e8 |
95 | my $cpp = default_cpp(); |
6ad8d9a8 |
96 | open(CPPO,"$cpp < errno.c |") or |
97 | die "Cannot exec $cpp"; |
98 | } |
eab60bb1 |
99 | |
100 | my $pat; |
101 | if ($^O eq 'MSWin32' and $Config{cc} =~ /^bcc/i) { |
102 | $pat = '^/\*\s+(.+)\s+\d+\s*:\s+\*/'; |
103 | } |
104 | else { |
76287dce |
105 | $pat = '^#(?:line)?\s*\d+\s+"([^"]+)"'; |
eab60bb1 |
106 | } |
107 | while(<CPPO>) { |
2449e420 |
108 | if ($^O eq 'os2' or $^O eq 'MSWin32') { |
0196e43b |
109 | if (/$pat/o) { |
110 | my $f = $1; |
111 | $f =~ s,\\\\,/,g; |
112 | $file{$f} = 1; |
113 | } |
114 | } |
115 | else { |
116 | $file{$1} = 1 if /$pat/o; |
117 | } |
eab60bb1 |
118 | } |
119 | close(CPPO); |
120 | } |
121 | return keys %file; |
122 | } |
123 | |
124 | sub write_errno_pm { |
125 | my $err; |
126 | |
def887e8 |
127 | # quick sanity check |
128 | |
129 | die "No error definitions found" unless keys %err; |
130 | |
eab60bb1 |
131 | # create the CPP input |
132 | |
133 | open(CPPI,"> errno.c") or |
134 | die "Cannot open errno.c"; |
135 | |
136 | print CPPI "#include <errno.h>\n"; |
137 | |
138 | foreach $err (keys %err) { |
139 | print CPPI '"',$err,'" [[',$err,']]',"\n"; |
140 | } |
141 | |
142 | close(CPPI); |
143 | |
144 | # invoke CPP and read the output |
dcbf900d |
145 | |
eab60bb1 |
146 | if ($^O eq 'VMS') { |
147 | my $cpp = "$Config{cppstdin} $Config{cppflags} $Config{cppminus}"; |
148 | $cpp =~ s/sys\$input//i; |
149 | open(CPPO,"$cpp errno.c |") or |
150 | die "Cannot exec $Config{cppstdin}"; |
6ad8d9a8 |
151 | } elsif ($^O eq 'MSWin32') { |
152 | open(CPPO,"$Config{cpprun} $Config{cppflags} errno.c |") or |
153 | die "Cannot run '$Config{cpprun} $Config{cppflags} errno.c'"; |
154 | } else { |
def887e8 |
155 | my $cpp = default_cpp(); |
dcbf900d |
156 | open(CPPO,"$cpp < errno.c |") |
157 | or die "Cannot exec $cpp"; |
eab60bb1 |
158 | } |
159 | |
160 | %err = (); |
161 | |
162 | while(<CPPO>) { |
163 | my($name,$expr); |
164 | next unless ($name, $expr) = /"(.*?)"\s*\[\s*\[\s*(.*?)\s*\]\s*\]/; |
165 | next if $name eq $expr; |
166 | $err{$name} = eval $expr; |
167 | } |
168 | close(CPPO); |
169 | |
170 | # Write Errno.pm |
171 | |
172 | print <<"EDQ"; |
173 | # |
174 | # This file is auto-generated. ***ANY*** changes here will be lost |
175 | # |
176 | |
177 | package Errno; |
178 | use vars qw(\@EXPORT_OK \%EXPORT_TAGS \@ISA \$VERSION \%errno \$AUTOLOAD); |
179 | use Exporter (); |
180 | use Config; |
181 | use strict; |
182 | |
146174a9 |
183 | "\$Config{'archname'}-\$Config{'osvers'}" eq |
184 | "$Config{'archname'}-$Config{'osvers'}" or |
185 | die "Errno architecture ($Config{'archname'}-$Config{'osvers'}) does not match executable architecture (\$Config{'archname'}-\$Config{'osvers'})"; |
eab60bb1 |
186 | |
187 | \$VERSION = "$VERSION"; |
188 | \@ISA = qw(Exporter); |
189 | |
190 | EDQ |
191 | |
192 | my $len = 0; |
193 | my @err = sort { $err{$a} <=> $err{$b} } keys %err; |
194 | map { $len = length if length > $len } @err; |
195 | |
196 | my $j = "\@EXPORT_OK = qw(" . join(" ",keys %err) . ");\n"; |
197 | $j =~ s/(.{50,70})\s/$1\n\t/g; |
198 | print $j,"\n"; |
199 | |
200 | print <<'ESQ'; |
201 | %EXPORT_TAGS = ( |
202 | POSIX => [qw( |
203 | ESQ |
204 | |
205 | my $k = join(" ", grep { exists $err{$_} } |
206 | qw(E2BIG EACCES EADDRINUSE EADDRNOTAVAIL EAFNOSUPPORT |
207 | EAGAIN EALREADY EBADF EBUSY ECHILD ECONNABORTED |
208 | ECONNREFUSED ECONNRESET EDEADLK EDESTADDRREQ EDOM EDQUOT |
209 | EEXIST EFAULT EFBIG EHOSTDOWN EHOSTUNREACH EINPROGRESS |
210 | EINTR EINVAL EIO EISCONN EISDIR ELOOP EMFILE EMLINK |
211 | EMSGSIZE ENAMETOOLONG ENETDOWN ENETRESET ENETUNREACH |
212 | ENFILE ENOBUFS ENODEV ENOENT ENOEXEC ENOLCK ENOMEM |
213 | ENOPROTOOPT ENOSPC ENOSYS ENOTBLK ENOTCONN ENOTDIR |
214 | ENOTEMPTY ENOTSOCK ENOTTY ENXIO EOPNOTSUPP EPERM |
215 | EPFNOSUPPORT EPIPE EPROCLIM EPROTONOSUPPORT EPROTOTYPE |
216 | ERANGE EREMOTE ERESTART EROFS ESHUTDOWN ESOCKTNOSUPPORT |
217 | ESPIPE ESRCH ESTALE ETIMEDOUT ETOOMANYREFS ETXTBSY |
218 | EUSERS EWOULDBLOCK EXDEV)); |
219 | |
220 | $k =~ s/(.{50,70})\s/$1\n\t/g; |
221 | print "\t",$k,"\n )]\n);\n\n"; |
222 | |
223 | foreach $err (@err) { |
224 | printf "sub %s () { %d }\n",,$err,$err{$err}; |
225 | } |
226 | |
227 | print <<'ESQ'; |
228 | |
229 | sub TIEHASH { bless [] } |
230 | |
231 | sub FETCH { |
232 | my ($self, $errname) = @_; |
233 | my $proto = prototype("Errno::$errname"); |
234 | if (defined($proto) && $proto eq "") { |
235 | no strict 'refs'; |
236 | return $! == &$errname; |
237 | } |
238 | require Carp; |
239 | Carp::confess("No errno $errname"); |
240 | } |
241 | |
242 | sub STORE { |
243 | require Carp; |
244 | Carp::confess("ERRNO hash is read only!"); |
245 | } |
246 | |
247 | *CLEAR = \&STORE; |
248 | *DELETE = \&STORE; |
249 | |
250 | sub NEXTKEY { |
251 | my($k,$v); |
252 | while(($k,$v) = each %Errno::) { |
253 | my $proto = prototype("Errno::$k"); |
254 | last if (defined($proto) && $proto eq ""); |
255 | |
256 | } |
257 | $k |
258 | } |
259 | |
260 | sub FIRSTKEY { |
261 | my $s = scalar keys %Errno::; |
262 | goto &NEXTKEY; |
263 | } |
264 | |
265 | sub EXISTS { |
266 | my ($self, $errname) = @_; |
267 | my $proto = prototype($errname); |
268 | defined($proto) && $proto eq ""; |
269 | } |
270 | |
271 | tie %!, __PACKAGE__; |
272 | |
273 | 1; |
274 | __END__ |
275 | |
276 | =head1 NAME |
277 | |
278 | Errno - System errno constants |
279 | |
280 | =head1 SYNOPSIS |
281 | |
282 | use Errno qw(EINTR EIO :POSIX); |
283 | |
284 | =head1 DESCRIPTION |
285 | |
286 | C<Errno> defines and conditionally exports all the error constants |
287 | defined in your system C<errno.h> include file. It has a single export |
288 | tag, C<:POSIX>, which will export all POSIX defined error numbers. |
289 | |
290 | C<Errno> also makes C<%!> magic such that each element of C<%!> has a non-zero |
291 | value only if C<$!> is set to that value, eg |
292 | |
293 | use Errno; |
294 | |
295 | unless (open(FH, "/fangorn/spouse")) { |
296 | if ($!{ENOENT}) { |
297 | warn "Get a wife!\n"; |
298 | } else { |
299 | warn "This path is barred: $!"; |
300 | } |
301 | } |
302 | |
303 | =head1 AUTHOR |
304 | |
305 | Graham Barr <gbarr@pobox.com> |
306 | |
307 | =head1 COPYRIGHT |
308 | |
309 | Copyright (c) 1997-8 Graham Barr. All rights reserved. |
310 | This program is free software; you can redistribute it and/or modify it |
311 | under the same terms as Perl itself. |
312 | |
313 | =cut |
314 | |
315 | ESQ |
316 | |
317 | } |