Commit | Line | Data |
eab60bb1 |
1 | use ExtUtils::MakeMaker; |
2 | use Config; |
3 | use strict; |
4 | |
76fbd8c4 |
5 | our $VERSION = "1.09_00"; |
eab60bb1 |
6 | |
7 | my %err = (); |
4d70086c |
8 | my %wsa = (); |
eab60bb1 |
9 | |
10 | unlink "Errno.pm" if -f "Errno.pm"; |
11 | open OUT, ">Errno.pm" or die "Cannot open Errno.pm: $!"; |
12 | select OUT; |
13 | my $file; |
14 | foreach $file (get_files()) { |
15 | process_file($file); |
16 | } |
17 | write_errno_pm(); |
18 | unlink "errno.c" if -f "errno.c"; |
19 | |
20 | sub process_file { |
21 | my($file) = @_; |
22 | |
6683669a |
23 | return unless defined $file and -f $file; |
4d70086c |
24 | # warn "Processing $file\n"; |
eab60bb1 |
25 | |
26 | local *FH; |
27 | if (($^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 | } |
7237d657 |
32 | } elsif ($Config{gccversion} ne '' |
8ff7320b |
33 | # OpenSTEP has gcc 2.7.2.1 which recognizes but |
34 | # doesn't implement the -dM flag. |
8f4f83ba |
35 | && $^O ne 'openstep' && $^O ne 'next' && $^O ne 'darwin' |
8ff7320b |
36 | ) { |
9ae2e8df |
37 | # With the -dM option, gcc outputs every #define it finds |
ee1e7ac2 |
38 | unless(open(FH,"$Config{cc} -E -dM $Config{cppflags} $file |")) { |
9ae2e8df |
39 | warn "Cannot open '$file'"; |
40 | return; |
41 | } |
eab60bb1 |
42 | } else { |
43 | unless(open(FH,"< $file")) { |
def887e8 |
44 | # This file could be a temporary file created by cppstdin |
6ad8d9a8 |
45 | # so only warn under -w, and return |
46 | warn "Cannot open '$file'" if $^W; |
eab60bb1 |
47 | return; |
48 | } |
49 | } |
db5fd395 |
50 | |
51 | if ($^O eq 'MacOS') { |
52 | while(<FH>) { |
53 | $err{$1} = $2 |
54 | if /^\s*#\s*define\s+(E\w+)\s+(\d+)/; |
55 | } |
56 | } else { |
57 | while(<FH>) { |
58 | $err{$1} = 1 |
59 | if /^\s*#\s*define\s+(E\w+)\s+/; |
4d70086c |
60 | if ($^O eq 'MSWin32') { |
61 | $wsa{$1} = 1 |
62 | if /^\s*#\s*define\s+WSA(E\w+)\s+/; |
63 | } |
db5fd395 |
64 | } |
65 | } |
66 | close(FH); |
eab60bb1 |
67 | } |
68 | |
def887e8 |
69 | my $cppstdin; |
70 | |
71 | sub default_cpp { |
72 | unless (defined $cppstdin) { |
73 | use File::Spec; |
74 | $cppstdin = $Config{cppstdin}; |
75 | my $upup_cppstdin = File::Spec->catfile(File::Spec->updir, |
76 | File::Spec->updir, |
77 | "cppstdin"); |
78 | my $cppstdin_is_wrapper = |
79 | ($cppstdin eq 'cppstdin' |
80 | and -f $upup_cppstdin |
81 | and -x $upup_cppstdin); |
82 | $cppstdin = $upup_cppstdin if $cppstdin_is_wrapper; |
83 | } |
84 | return "$cppstdin $Config{cppflags} $Config{cppminus}"; |
85 | } |
86 | |
eab60bb1 |
87 | sub get_files { |
88 | my %file = (); |
89 | # VMS keeps its include files in system libraries (well, except for Gcc) |
90 | if ($^O eq 'VMS') { |
91 | if ($Config{vms_cc_type} eq 'decc') { |
92 | $file{'Sys$Library:DECC$RTLDEF.TLB'} = 1; |
93 | } elsif ($Config{vms_cc_type} eq 'vaxc') { |
94 | $file{'Sys$Library:vaxcdef.tlb'} = 1; |
95 | } elsif ($Config{vms_cc_type} eq 'gcc') { |
96 | $file{'gnu_cc_include:[000000]errno.h'} = 1; |
97 | } |
9d116dd7 |
98 | } elsif ($^O eq 'os390') { |
99 | # OS/390 C compiler doesn't generate #file or #line directives |
100 | $file{'/usr/include/errno.h'} = 1; |
092bebab |
101 | } elsif ($^O eq 'vmesa') { |
102 | # OS/390 C compiler doesn't generate #file or #line directives |
103 | $file{'../../vmesa/errno.h'} = 1; |
a367e475 |
104 | } elsif ($Config{archname} eq 'epoc') { |
105 | # Watch out for cross compiling for EPOC (usually done on linux) |
02a99678 |
106 | $file{'/usr/local/epocemx/epocsdk/include/libc/sys/errno.h'} = 1; |
022394cf |
107 | } elsif ($^O eq 'linux' && |
108 | $Config{gccversion} ne '' # might be using, say, Intel's icc |
109 | ) { |
9ae2e8df |
110 | # Some Linuxes have weird errno.hs which generate |
111 | # no #file or #line directives |
112 | $file{'/usr/include/errno.h'} = 1; |
db5fd395 |
113 | } elsif ($^O eq 'MacOS') { |
114 | # note that we are only getting the GUSI errno's here ... |
115 | # we might miss out on compiler-specific ones |
116 | $file{"$ENV{GUSI}include:sys:errno.h"} = 1; |
117 | |
0d3cd356 |
118 | } elsif ($^O eq 'beos') { |
119 | # hidden in a special place |
120 | $file{'/boot/develop/headers/posix/errno.h'} = 1; |
121 | |
196918b0 |
122 | } elsif ($^O eq 'vos') { |
123 | # avoid problem where cpp returns non-POSIX pathnames |
124 | $file{'/system/include_library/errno.h'} = 1; |
eab60bb1 |
125 | } else { |
126 | open(CPPI,"> errno.c") or |
127 | die "Cannot open errno.c"; |
128 | |
2986a63f |
129 | if ($^O eq 'NetWare') { |
c623ac67 |
130 | print CPPI "#include <nwerrno.h>\n"; |
2986a63f |
131 | } else { |
c623ac67 |
132 | print CPPI "#include <errno.h>\n"; |
133 | if ($^O eq 'MSWin32') { |
134 | print CPPI "#define _WINSOCKAPI_\n"; # don't drag in everything |
135 | print CPPI "#include <winsock.h>\n"; |
136 | } |
2986a63f |
137 | } |
eab60bb1 |
138 | |
139 | close(CPPI); |
140 | |
141 | # invoke CPP and read the output |
2986a63f |
142 | if ($^O eq 'MSWin32' || $^O eq 'NetWare') { |
6ad8d9a8 |
143 | open(CPPO,"$Config{cpprun} $Config{cppflags} errno.c |") or |
144 | die "Cannot run '$Config{cpprun} $Config{cppflags} errno.c'"; |
145 | } else { |
def887e8 |
146 | my $cpp = default_cpp(); |
6ad8d9a8 |
147 | open(CPPO,"$cpp < errno.c |") or |
148 | die "Cannot exec $cpp"; |
149 | } |
eab60bb1 |
150 | |
151 | my $pat; |
2986a63f |
152 | if (($^O eq 'MSWin32' || $^O eq 'NetWare') and $Config{cc} =~ /^bcc/i) { |
eab60bb1 |
153 | $pat = '^/\*\s+(.+)\s+\d+\s*:\s+\*/'; |
154 | } |
155 | else { |
d0d1d9b9 |
156 | $pat = '^#\s*(?:line)?\s*\d+\s+"([^"]+)"'; |
eab60bb1 |
157 | } |
158 | while(<CPPO>) { |
2986a63f |
159 | if ($^O eq 'os2' or $^O eq 'MSWin32' or $^O eq 'NetWare') { |
0196e43b |
160 | if (/$pat/o) { |
161 | my $f = $1; |
162 | $f =~ s,\\\\,/,g; |
163 | $file{$f} = 1; |
164 | } |
165 | } |
166 | else { |
167 | $file{$1} = 1 if /$pat/o; |
168 | } |
eab60bb1 |
169 | } |
170 | close(CPPO); |
171 | } |
172 | return keys %file; |
173 | } |
174 | |
175 | sub write_errno_pm { |
176 | my $err; |
177 | |
def887e8 |
178 | # quick sanity check |
179 | |
180 | die "No error definitions found" unless keys %err; |
181 | |
eab60bb1 |
182 | # create the CPP input |
183 | |
184 | open(CPPI,"> errno.c") or |
185 | die "Cannot open errno.c"; |
186 | |
2986a63f |
187 | if ($^O eq 'NetWare') { |
4d70086c |
188 | print CPPI "#include <nwerrno.h>\n"; |
189 | } |
190 | else { |
191 | print CPPI "#include <errno.h>\n"; |
192 | } |
193 | if ($^O eq 'MSWin32') { |
194 | print CPPI "#include <winsock.h>\n"; |
195 | foreach $err (keys %wsa) { |
196 | print CPPI "#ifndef $err\n"; |
197 | print CPPI "#define $err WSA$err\n"; |
198 | print CPPI "#endif\n"; |
199 | $err{$err} = 1; |
2986a63f |
200 | } |
4d70086c |
201 | } |
202 | |
eab60bb1 |
203 | foreach $err (keys %err) { |
204 | print CPPI '"',$err,'" [[',$err,']]',"\n"; |
205 | } |
206 | |
207 | close(CPPI); |
208 | |
db5fd395 |
209 | unless ($^O eq 'MacOS') { # trust what we have |
eab60bb1 |
210 | # invoke CPP and read the output |
dcbf900d |
211 | |
db5fd395 |
212 | if ($^O eq 'VMS') { |
213 | my $cpp = "$Config{cppstdin} $Config{cppflags} $Config{cppminus}"; |
214 | $cpp =~ s/sys\$input//i; |
215 | open(CPPO,"$cpp errno.c |") or |
216 | die "Cannot exec $Config{cppstdin}"; |
2986a63f |
217 | } elsif ($^O eq 'MSWin32' || $^O eq 'NetWare') { |
db5fd395 |
218 | open(CPPO,"$Config{cpprun} $Config{cppflags} errno.c |") or |
219 | die "Cannot run '$Config{cpprun} $Config{cppflags} errno.c'"; |
220 | } else { |
221 | my $cpp = default_cpp(); |
222 | open(CPPO,"$cpp < errno.c |") |
223 | or die "Cannot exec $cpp"; |
224 | } |
eab60bb1 |
225 | |
db5fd395 |
226 | %err = (); |
eab60bb1 |
227 | |
db5fd395 |
228 | while(<CPPO>) { |
229 | my($name,$expr); |
230 | next unless ($name, $expr) = /"(.*?)"\s*\[\s*\[\s*(.*?)\s*\]\s*\]/; |
231 | next if $name eq $expr; |
0d3cd356 |
232 | $expr =~ s/(\d+)[LU]+\b/$1/g; # 2147483647L et alia |
db5fd395 |
233 | $err{$name} = eval $expr; |
234 | } |
235 | close(CPPO); |
eab60bb1 |
236 | } |
eab60bb1 |
237 | |
7bf567bf |
238 | # Many of the E constants (including ENOENT, which is being |
239 | # used in the Perl test suite a lot), are available only as |
240 | # enums in BeOS, so compiling and executing some code is about |
241 | # only way to find out what the numeric Evalues are. |
242 | |
243 | if ($^O eq 'beos') { |
244 | if (open(C, ">errno.c")) { |
245 | my @zero = grep { !$err{$_} } keys %err; |
246 | print C <<EOF; |
247 | #include <errno.h> |
248 | #include <stdio.h> |
249 | int main() { |
250 | EOF |
251 | for (@zero) { |
252 | print C qq[printf("$_ %d\n", $_);] |
253 | } |
254 | print C "}\n"; |
255 | close C; |
256 | system("cc -o errno errno.c"); |
257 | unlink("errno.c"); |
258 | if (open(C, "./errno|")) { |
259 | while (<C>) { |
260 | if (/^(\w+) (-?\d+)$/) { $err{$1} = $2 } |
261 | } |
262 | close(C); |
263 | } else { |
264 | die "failed to execute ./errno: $!\n"; |
265 | } |
266 | unlink("errno"); |
267 | } else { |
268 | die "failed to create errno.c: $!\n"; |
269 | } |
270 | } |
271 | |
eab60bb1 |
272 | # Write Errno.pm |
273 | |
274 | print <<"EDQ"; |
275 | # |
276 | # This file is auto-generated. ***ANY*** changes here will be lost |
277 | # |
278 | |
279 | package Errno; |
f168a5e7 |
280 | our (\@EXPORT_OK,\%EXPORT_TAGS,\@ISA,\$VERSION,\%errno,\$AUTOLOAD); |
eab60bb1 |
281 | use Exporter (); |
282 | use Config; |
283 | use strict; |
284 | |
8bc9d590 |
285 | "\$Config{'archname'}-\$Config{'osvers'}" eq |
286 | "$Config{'archname'}-$Config{'osvers'}" or |
81be85b8 |
287 | die "Errno architecture ($Config{'archname'}-$Config{'osvers'}) does not match executable architecture (\$Config{'archname'}-\$Config{'osvers'})"; |
eab60bb1 |
288 | |
289 | \$VERSION = "$VERSION"; |
290 | \@ISA = qw(Exporter); |
291 | |
292 | EDQ |
293 | |
294 | my $len = 0; |
295 | my @err = sort { $err{$a} <=> $err{$b} } keys %err; |
296 | map { $len = length if length > $len } @err; |
297 | |
298 | my $j = "\@EXPORT_OK = qw(" . join(" ",keys %err) . ");\n"; |
299 | $j =~ s/(.{50,70})\s/$1\n\t/g; |
300 | print $j,"\n"; |
301 | |
302 | print <<'ESQ'; |
303 | %EXPORT_TAGS = ( |
304 | POSIX => [qw( |
305 | ESQ |
306 | |
307 | my $k = join(" ", grep { exists $err{$_} } |
308 | qw(E2BIG EACCES EADDRINUSE EADDRNOTAVAIL EAFNOSUPPORT |
309 | EAGAIN EALREADY EBADF EBUSY ECHILD ECONNABORTED |
310 | ECONNREFUSED ECONNRESET EDEADLK EDESTADDRREQ EDOM EDQUOT |
311 | EEXIST EFAULT EFBIG EHOSTDOWN EHOSTUNREACH EINPROGRESS |
312 | EINTR EINVAL EIO EISCONN EISDIR ELOOP EMFILE EMLINK |
313 | EMSGSIZE ENAMETOOLONG ENETDOWN ENETRESET ENETUNREACH |
314 | ENFILE ENOBUFS ENODEV ENOENT ENOEXEC ENOLCK ENOMEM |
315 | ENOPROTOOPT ENOSPC ENOSYS ENOTBLK ENOTCONN ENOTDIR |
316 | ENOTEMPTY ENOTSOCK ENOTTY ENXIO EOPNOTSUPP EPERM |
317 | EPFNOSUPPORT EPIPE EPROCLIM EPROTONOSUPPORT EPROTOTYPE |
318 | ERANGE EREMOTE ERESTART EROFS ESHUTDOWN ESOCKTNOSUPPORT |
319 | ESPIPE ESRCH ESTALE ETIMEDOUT ETOOMANYREFS ETXTBSY |
320 | EUSERS EWOULDBLOCK EXDEV)); |
321 | |
322 | $k =~ s/(.{50,70})\s/$1\n\t/g; |
323 | print "\t",$k,"\n )]\n);\n\n"; |
324 | |
325 | foreach $err (@err) { |
326 | printf "sub %s () { %d }\n",,$err,$err{$err}; |
327 | } |
328 | |
329 | print <<'ESQ'; |
330 | |
331 | sub TIEHASH { bless [] } |
332 | |
333 | sub FETCH { |
334 | my ($self, $errname) = @_; |
335 | my $proto = prototype("Errno::$errname"); |
68301627 |
336 | my $errno = ""; |
eab60bb1 |
337 | if (defined($proto) && $proto eq "") { |
338 | no strict 'refs'; |
68301627 |
339 | $errno = &$errname; |
340 | $errno = 0 unless $! == $errno; |
eab60bb1 |
341 | } |
68301627 |
342 | return $errno; |
93014de6 |
343 | } |
eab60bb1 |
344 | |
345 | sub STORE { |
346 | require Carp; |
347 | Carp::confess("ERRNO hash is read only!"); |
348 | } |
349 | |
350 | *CLEAR = \&STORE; |
351 | *DELETE = \&STORE; |
352 | |
353 | sub NEXTKEY { |
354 | my($k,$v); |
355 | while(($k,$v) = each %Errno::) { |
356 | my $proto = prototype("Errno::$k"); |
357 | last if (defined($proto) && $proto eq ""); |
eab60bb1 |
358 | } |
359 | $k |
360 | } |
361 | |
362 | sub FIRSTKEY { |
68301627 |
363 | my $s = scalar keys %Errno::; # initialize iterator |
eab60bb1 |
364 | goto &NEXTKEY; |
365 | } |
366 | |
367 | sub EXISTS { |
368 | my ($self, $errname) = @_; |
369 | my $proto = prototype($errname); |
370 | defined($proto) && $proto eq ""; |
371 | } |
372 | |
373 | tie %!, __PACKAGE__; |
374 | |
375 | 1; |
376 | __END__ |
377 | |
378 | =head1 NAME |
379 | |
380 | Errno - System errno constants |
381 | |
382 | =head1 SYNOPSIS |
383 | |
384 | use Errno qw(EINTR EIO :POSIX); |
385 | |
386 | =head1 DESCRIPTION |
387 | |
388 | C<Errno> defines and conditionally exports all the error constants |
389 | defined in your system C<errno.h> include file. It has a single export |
390 | tag, C<:POSIX>, which will export all POSIX defined error numbers. |
391 | |
93014de6 |
392 | C<Errno> also makes C<%!> magic such that each element of C<%!> has a |
68301627 |
393 | non-zero value only if C<$!> is set to that value. For example: |
eab60bb1 |
394 | |
395 | use Errno; |
3cb6de81 |
396 | |
eab60bb1 |
397 | unless (open(FH, "/fangorn/spouse")) { |
398 | if ($!{ENOENT}) { |
399 | warn "Get a wife!\n"; |
400 | } else { |
401 | warn "This path is barred: $!"; |
402 | } |
403 | } |
404 | |
68301627 |
405 | If a specified constant C<EFOO> does not exist on the system, C<$!{EFOO}> |
406 | returns C<"">. You may use C<exists $!{EFOO}> to check whether the |
93014de6 |
407 | constant is available on the system. |
408 | |
68301627 |
409 | =head1 CAVEATS |
410 | |
411 | Importing a particular constant may not be very portable, because the |
412 | import will fail on platforms that do not have that constant. A more |
413 | portable way to set C<$!> to a valid value is to use: |
414 | |
415 | if (exists &Errno::EFOO) { |
416 | $! = &Errno::EFOO; |
417 | } |
418 | |
eab60bb1 |
419 | =head1 AUTHOR |
420 | |
421 | Graham Barr <gbarr@pobox.com> |
422 | |
423 | =head1 COPYRIGHT |
424 | |
425 | Copyright (c) 1997-8 Graham Barr. All rights reserved. |
426 | This program is free software; you can redistribute it and/or modify it |
427 | under the same terms as Perl itself. |
428 | |
429 | =cut |
430 | |
431 | ESQ |
432 | |
433 | } |