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