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