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