| 1 | use ExtUtils::MakeMaker;
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| 2 | use Config;
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| 3 | use strict;
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| 4 |
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| 5 | our $VERSION = "1.09_01";
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| 6 |
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| 7 | my %err = ();
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| 8 | my %wsa = ();
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| 9 |
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| 10 | unlink "Errno.pm" if -f "Errno.pm";
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| 11 | open OUT, ">Errno.pm" or die "Cannot open Errno.pm: $!";
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| 12 | select OUT;
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| 13 | my $file;
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| 14 | my @files = get_files();
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| 15 | if ($Config{gccversion} ne '' && $^O eq 'MSWin32') {
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| 16 | # MinGW complains "warning: #pragma system_header ignored outside include
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| 17 | # file" if the header files are processed individually, so include them
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| 18 | # all in .c file and process that instead.
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| 19 | open INCS, '>includes.c' or
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| 20 | die "Cannot open includes.c";
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| 21 | foreach $file (@files) {
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| 22 | next if $file eq 'errno.c';
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| 23 | next unless -f $file;
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| 24 | print INCS qq[#include "$file"\n];
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| 25 | }
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| 26 | close INCS;
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| 27 | process_file('includes.c');
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| 28 | unlink 'includes.c';
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| 29 | }
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| 30 | else {
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| 31 | foreach $file (@files) {
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| 32 | process_file($file);
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| 33 | }
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| 34 | }
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| 35 | write_errno_pm();
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| 36 | unlink "errno.c" if -f "errno.c";
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| 37 |
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| 38 | sub process_file {
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| 39 | my($file) = @_;
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| 40 |
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| 41 | # for win32 perl under cygwin, we need to get a windows pathname
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| 42 | if ($^O eq 'MSWin32' && $Config{cc} =~ /\B-mno-cygwin\b/ &&
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| 43 | defined($file) && !-f $file) {
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| 44 | chomp($file = `cygpath -w "$file"`);
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| 45 | }
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| 46 |
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| 47 | return unless defined $file and -f $file;
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| 48 | # warn "Processing $file\n";
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| 49 |
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| 50 | local *FH;
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| 51 | if (($^O eq 'VMS') && ($Config{vms_cc_type} ne 'gnuc')) {
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| 52 | unless(open(FH," LIBRARY/EXTRACT=ERRNO/OUTPUT=SYS\$OUTPUT $file |")) {
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| 53 | warn "Cannot open '$file'";
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| 54 | return;
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| 55 | }
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| 56 | } elsif ($Config{gccversion} ne ''
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| 57 | # OpenSTEP has gcc 2.7.2.1 which recognizes but
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| 58 | # doesn't implement the -dM flag.
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| 59 | && $^O ne 'openstep' && $^O ne 'next' && $^O ne 'darwin'
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| 60 | ) {
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| 61 | # With the -dM option, gcc outputs every #define it finds
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| 62 | unless(open(FH,"$Config{cc} -E -dM $Config{cppflags} $file |")) {
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| 63 | warn "Cannot open '$file'";
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| 64 | return;
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| 65 | }
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| 66 | } else {
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| 67 | unless(open(FH,"< $file")) {
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| 68 | # This file could be a temporary file created by cppstdin
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| 69 | # so only warn under -w, and return
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| 70 | warn "Cannot open '$file'" if $^W;
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| 71 | return;
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| 72 | }
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| 73 | }
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| 74 |
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| 75 | if ($^O eq 'MacOS') {
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| 76 | while(<FH>) {
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| 77 | $err{$1} = $2
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| 78 | if /^\s*#\s*define\s+(E\w+)\s+(\d+)/;
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| 79 | }
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| 80 | } else {
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| 81 | while(<FH>) {
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| 82 | $err{$1} = 1
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| 83 | if /^\s*#\s*define\s+(E\w+)\s+/;
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| 84 | if ($^O eq 'MSWin32') {
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| 85 | $wsa{$1} = 1
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| 86 | if /^\s*#\s*define\s+WSA(E\w+)\s+/;
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| 87 | }
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| 88 | }
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| 89 | }
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| 90 | close(FH);
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| 91 | }
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| 92 |
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| 93 | my $cppstdin;
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| 94 |
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| 95 | sub default_cpp {
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| 96 | unless (defined $cppstdin) {
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| 97 | use File::Spec;
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| 98 | $cppstdin = $Config{cppstdin};
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| 99 | my $upup_cppstdin = File::Spec->catfile(File::Spec->updir,
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| 100 | File::Spec->updir,
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| 101 | "cppstdin");
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| 102 | my $cppstdin_is_wrapper =
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| 103 | ($cppstdin eq 'cppstdin'
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| 104 | and -f $upup_cppstdin
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| 105 | and -x $upup_cppstdin);
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| 106 | $cppstdin = $upup_cppstdin if $cppstdin_is_wrapper;
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| 107 | }
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| 108 | return "$cppstdin $Config{cppflags} $Config{cppminus}";
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| 109 | }
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| 110 |
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| 111 | sub get_files {
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| 112 | my %file = ();
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| 113 | # VMS keeps its include files in system libraries (well, except for Gcc)
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| 114 | if ($^O eq 'VMS') {
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| 115 | if ($Config{vms_cc_type} eq 'decc') {
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| 116 | $file{'Sys$Library:DECC$RTLDEF.TLB'} = 1;
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| 117 | } elsif ($Config{vms_cc_type} eq 'vaxc') {
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| 118 | $file{'Sys$Library:vaxcdef.tlb'} = 1;
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| 119 | } elsif ($Config{vms_cc_type} eq 'gcc') {
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| 120 | $file{'gnu_cc_include:[000000]errno.h'} = 1;
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| 121 | }
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| 122 | } elsif ($^O eq 'os390') {
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| 123 | # OS/390 C compiler doesn't generate #file or #line directives
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| 124 | $file{'/usr/include/errno.h'} = 1;
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| 125 | } elsif ($^O eq 'vmesa') {
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| 126 | # OS/390 C compiler doesn't generate #file or #line directives
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| 127 | $file{'../../vmesa/errno.h'} = 1;
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| 128 | } elsif ($Config{archname} eq 'epoc') {
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| 129 | # Watch out for cross compiling for EPOC (usually done on linux)
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| 130 | $file{'/usr/local/epocemx/epocsdk/include/libc/sys/errno.h'} = 1;
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| 131 | } elsif ($^O eq 'linux' &&
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| 132 | $Config{gccversion} ne '' # might be using, say, Intel's icc
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| 133 | ) {
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| 134 | # Some Linuxes have weird errno.hs which generate
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| 135 | # no #file or #line directives
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| 136 | my $linux_errno_h = -e '/usr/include/errno.h' ?
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| 137 | '/usr/include/errno.h' : '/usr/local/include/errno.h';
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| 138 | $file{$linux_errno_h} = 1;
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| 139 | } elsif ($^O eq 'MacOS') {
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| 140 | # note that we are only getting the GUSI errno's here ...
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| 141 | # we might miss out on compiler-specific ones
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| 142 | $file{"$ENV{GUSI}include:sys:errno.h"} = 1;
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| 143 |
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| 144 | } elsif ($^O eq 'beos') {
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| 145 | # hidden in a special place
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| 146 | $file{'/boot/develop/headers/posix/errno.h'} = 1;
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| 147 |
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| 148 | } elsif ($^O eq 'vos') {
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| 149 | # avoid problem where cpp returns non-POSIX pathnames
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| 150 | $file{'/system/include_library/errno.h'} = 1;
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| 151 | } else {
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| 152 | open(CPPI,"> errno.c") or
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| 153 | die "Cannot open errno.c";
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| 154 |
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| 155 | if ($^O eq 'NetWare') {
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| 156 | print CPPI "#include <nwerrno.h>\n";
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| 157 | } else {
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| 158 | print CPPI "#include <errno.h>\n";
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| 159 | if ($^O eq 'MSWin32') {
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| 160 | print CPPI "#define _WINSOCKAPI_\n"; # don't drag in everything
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| 161 | print CPPI "#include <winsock.h>\n";
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| 162 | }
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| 163 | }
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| 164 |
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| 165 | close(CPPI);
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| 166 |
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| 167 | # invoke CPP and read the output
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| 168 | if ($^O eq 'MSWin32' || $^O eq 'NetWare') {
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| 169 | open(CPPO,"$Config{cpprun} $Config{cppflags} errno.c |") or
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| 170 | die "Cannot run '$Config{cpprun} $Config{cppflags} errno.c'";
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| 171 | } else {
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| 172 | my $cpp = default_cpp();
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| 173 | open(CPPO,"$cpp < errno.c |") or
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| 174 | die "Cannot exec $cpp";
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| 175 | }
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| 176 |
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| 177 | my $pat;
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| 178 | if (($^O eq 'MSWin32' || $^O eq 'NetWare') and $Config{cc} =~ /^bcc/i) {
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| 179 | $pat = '^/\*\s+(.+)\s+\d+\s*:\s+\*/';
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| 180 | }
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| 181 | else {
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| 182 | $pat = '^#\s*(?:line)?\s*\d+\s+"([^"]+)"';
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| 183 | }
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| 184 | while(<CPPO>) {
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| 185 | if ($^O eq 'os2' or $^O eq 'MSWin32' or $^O eq 'NetWare') {
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| 186 | if (/$pat/o) {
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| 187 | my $f = $1;
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| 188 | $f =~ s,\\\\,/,g;
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| 189 | $file{$f} = 1;
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| 190 | }
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| 191 | }
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| 192 | else {
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| 193 | $file{$1} = 1 if /$pat/o;
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| 194 | }
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| 195 | }
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| 196 | close(CPPO);
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| 197 | }
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| 198 | return keys %file;
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| 199 | }
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| 200 |
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| 201 | sub write_errno_pm {
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| 202 | my $err;
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| 203 |
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| 204 | # quick sanity check
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| 205 |
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| 206 | die "No error definitions found" unless keys %err;
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| 207 |
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| 208 | # create the CPP input
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| 209 |
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| 210 | open(CPPI,"> errno.c") or
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| 211 | die "Cannot open errno.c";
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| 212 |
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| 213 | if ($^O eq 'NetWare') {
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| 214 | print CPPI "#include <nwerrno.h>\n";
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| 215 | }
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| 216 | else {
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| 217 | print CPPI "#include <errno.h>\n";
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| 218 | }
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| 219 | if ($^O eq 'MSWin32') {
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| 220 | print CPPI "#include <winsock.h>\n";
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| 221 | foreach $err (keys %wsa) {
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| 222 | print CPPI "#ifndef $err\n";
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| 223 | print CPPI "#define $err WSA$err\n";
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| 224 | print CPPI "#endif\n";
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| 225 | $err{$err} = 1;
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| 226 | }
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| 227 | }
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| 228 |
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| 229 | foreach $err (keys %err) {
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| 230 | print CPPI '"',$err,'" [[',$err,']]',"\n";
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| 231 | }
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| 232 |
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| 233 | close(CPPI);
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| 234 |
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| 235 | unless ($^O eq 'MacOS' || $^O eq 'beos') { # trust what we have / get later
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| 236 | # invoke CPP and read the output
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| 237 |
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| 238 | if ($^O eq 'VMS') {
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| 239 | my $cpp = "$Config{cppstdin} $Config{cppflags} $Config{cppminus}";
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| 240 | $cpp =~ s/sys\$input//i;
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| 241 | open(CPPO,"$cpp errno.c |") or
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| 242 | die "Cannot exec $Config{cppstdin}";
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| 243 | } elsif ($^O eq 'MSWin32' || $^O eq 'NetWare') {
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| 244 | open(CPPO,"$Config{cpprun} $Config{cppflags} errno.c |") or
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| 245 | die "Cannot run '$Config{cpprun} $Config{cppflags} errno.c'";
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| 246 | } else {
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| 247 | my $cpp = default_cpp();
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| 248 | open(CPPO,"$cpp < errno.c |")
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| 249 | or die "Cannot exec $cpp";
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| 250 | }
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| 251 |
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| 252 | %err = ();
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| 253 |
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| 254 | while(<CPPO>) {
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| 255 | my($name,$expr);
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| 256 | next unless ($name, $expr) = /"(.*?)"\s*\[\s*\[\s*(.*?)\s*\]\s*\]/;
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| 257 | next if $name eq $expr;
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| 258 | $expr =~ s/\(?\([a-z_]\w*\)([^\)]*)\)?/$1/i; # ((type)0xcafebabe) at alia
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| 259 | $expr =~ s/((?:0x)?[0-9a-fA-F]+)[LU]+\b/$1/g; # 2147483647L et alia
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| 260 | next if $expr =~ m/^[a-zA-Z]+$/; # skip some Win32 functions
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| 261 | if($expr =~ m/^0[xX]/) {
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| 262 | $err{$name} = hex $expr;
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| 263 | }
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| 264 | else {
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| 265 | $err{$name} = eval $expr;
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| 266 | }
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| 267 | delete $err{$name} unless defined $err{$name};
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| 268 | }
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| 269 | close(CPPO);
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| 270 | }
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| 271 |
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| 272 | # Many of the E constants (including ENOENT, which is being
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| 273 | # used in the Perl test suite a lot), are available only as
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| 274 | # enums in BeOS, so compiling and executing some code is about
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| 275 | # only way to find out what the numeric Evalues are. In fact above, we
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| 276 | # didn't even bother to get the values of the ones that have numeric
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| 277 | # values, since we can get all of them here, anyway.
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| 278 |
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| 279 | if ($^O eq 'beos') {
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| 280 | if (open(C, ">errno.c")) {
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| 281 | my @allerrs = keys %err;
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| 282 | print C <<EOF;
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| 283 | #include <errno.h>
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| 284 | #include <stdio.h>
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| 285 | int main() {
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| 286 | EOF
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| 287 | for (@allerrs) {
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| 288 | print C qq[printf("$_ %d\n", $_);]
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| 289 | }
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| 290 | print C "}\n";
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| 291 | close C;
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| 292 | system("cc -o errno errno.c");
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| 293 | unlink("errno.c");
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| 294 | if (open(C, "./errno|")) {
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| 295 | while (<C>) {
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| 296 | if (/^(\w+) (-?\d+)$/) { $err{$1} = $2 }
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| 297 | }
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| 298 | close(C);
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| 299 | } else {
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| 300 | die "failed to execute ./errno: $!\n";
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| 301 | }
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| 302 | unlink("errno");
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| 303 | } else {
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| 304 | die "failed to create errno.c: $!\n";
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| 305 | }
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| 306 | }
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| 307 |
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| 308 | # Write Errno.pm
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| 309 |
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| 310 | print <<"EDQ";
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| 311 | #
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| 312 | # This file is auto-generated. ***ANY*** changes here will be lost
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| 313 | #
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| 314 |
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| 315 | package Errno;
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| 316 | our (\@EXPORT_OK,\%EXPORT_TAGS,\@ISA,\$VERSION,\%errno,\$AUTOLOAD);
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| 317 | use Exporter ();
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| 318 | use Config;
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| 319 | use strict;
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| 320 |
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| 321 | "\$Config{'archname'}-\$Config{'osvers'}" eq
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| 322 | "$Config{'archname'}-$Config{'osvers'}" or
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| 323 | die "Errno architecture ($Config{'archname'}-$Config{'osvers'}) does not match executable architecture (\$Config{'archname'}-\$Config{'osvers'})";
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| 324 |
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| 325 | \$VERSION = "$VERSION";
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| 326 | \$VERSION = eval \$VERSION;
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| 327 | \@ISA = qw(Exporter);
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| 328 |
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| 329 | EDQ
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| 330 |
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| 331 | my $len = 0;
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| 332 | my @err = sort { $err{$a} <=> $err{$b} } keys %err;
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| 333 | map { $len = length if length > $len } @err;
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| 334 |
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| 335 | my $j = "\@EXPORT_OK = qw(" . join(" ",keys %err) . ");\n";
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| 336 | $j =~ s/(.{50,70})\s/$1\n\t/g;
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| 337 | print $j,"\n";
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| 338 |
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| 339 | print <<'ESQ';
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| 340 | %EXPORT_TAGS = (
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| 341 | POSIX => [qw(
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| 342 | ESQ
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| 343 |
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| 344 | my $k = join(" ", grep { exists $err{$_} }
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| 345 | qw(E2BIG EACCES EADDRINUSE EADDRNOTAVAIL EAFNOSUPPORT
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| 346 | EAGAIN EALREADY EBADF EBUSY ECHILD ECONNABORTED
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| 347 | ECONNREFUSED ECONNRESET EDEADLK EDESTADDRREQ EDOM EDQUOT
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| 348 | EEXIST EFAULT EFBIG EHOSTDOWN EHOSTUNREACH EINPROGRESS
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| 349 | EINTR EINVAL EIO EISCONN EISDIR ELOOP EMFILE EMLINK
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| 350 | EMSGSIZE ENAMETOOLONG ENETDOWN ENETRESET ENETUNREACH
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| 351 | ENFILE ENOBUFS ENODEV ENOENT ENOEXEC ENOLCK ENOMEM
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| 352 | ENOPROTOOPT ENOSPC ENOSYS ENOTBLK ENOTCONN ENOTDIR
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| 353 | ENOTEMPTY ENOTSOCK ENOTTY ENXIO EOPNOTSUPP EPERM
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| 354 | EPFNOSUPPORT EPIPE EPROCLIM EPROTONOSUPPORT EPROTOTYPE
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| 355 | ERANGE EREMOTE ERESTART EROFS ESHUTDOWN ESOCKTNOSUPPORT
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| 356 | ESPIPE ESRCH ESTALE ETIMEDOUT ETOOMANYREFS ETXTBSY
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| 357 | EUSERS EWOULDBLOCK EXDEV));
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| 358 |
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| 359 | $k =~ s/(.{50,70})\s/$1\n\t/g;
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| 360 | print "\t",$k,"\n )]\n);\n\n";
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| 361 |
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| 362 | foreach $err (@err) {
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| 363 | printf "sub %s () { %d }\n",,$err,$err{$err};
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| 364 | }
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| 365 |
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| 366 | print <<'ESQ';
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| 367 |
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| 368 | sub TIEHASH { bless [] }
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| 369 |
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| 370 | sub FETCH {
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| 371 | my ($self, $errname) = @_;
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| 372 | my $proto = prototype("Errno::$errname");
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| 373 | my $errno = "";
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| 374 | if (defined($proto) && $proto eq "") {
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| 375 | no strict 'refs';
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| 376 | $errno = &$errname;
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| 377 | $errno = 0 unless $! == $errno;
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| 378 | }
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| 379 | return $errno;
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| 380 | }
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| 381 |
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| 382 | sub STORE {
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| 383 | require Carp;
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| 384 | Carp::confess("ERRNO hash is read only!");
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| 385 | }
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| 386 |
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| 387 | *CLEAR = \&STORE;
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| 388 | *DELETE = \&STORE;
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| 389 |
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| 390 | sub NEXTKEY {
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| 391 | my($k,$v);
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| 392 | while(($k,$v) = each %Errno::) {
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| 393 | my $proto = prototype("Errno::$k");
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| 394 | last if (defined($proto) && $proto eq "");
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| 395 | }
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| 396 | $k
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| 397 | }
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| 398 |
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| 399 | sub FIRSTKEY {
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| 400 | my $s = scalar keys %Errno::; # initialize iterator
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| 401 | goto &NEXTKEY;
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| 402 | }
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| 403 |
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| 404 | sub EXISTS {
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| 405 | my ($self, $errname) = @_;
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| 406 | my $r = ref $errname;
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| 407 | my $proto = !$r || $r eq 'CODE' ? prototype($errname) : undef;
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| 408 | defined($proto) && $proto eq "";
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| 409 | }
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| 410 |
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| 411 | tie %!, __PACKAGE__;
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| 412 |
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| 413 | 1;
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| 414 | __END__
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| 415 |
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| 416 | =head1 NAME
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| 417 |
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| 418 | Errno - System errno constants
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| 419 |
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| 420 | =head1 SYNOPSIS
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| 421 |
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| 422 | use Errno qw(EINTR EIO :POSIX);
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| 423 |
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| 424 | =head1 DESCRIPTION
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| 425 |
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| 426 | C<Errno> defines and conditionally exports all the error constants
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| 427 | defined in your system C<errno.h> include file. It has a single export
|
|---|
| 428 | tag, C<:POSIX>, which will export all POSIX defined error numbers.
|
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| 429 |
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| 430 | C<Errno> also makes C<%!> magic such that each element of C<%!> has a
|
|---|
| 431 | non-zero value only if C<$!> is set to that value. For example:
|
|---|
| 432 |
|
|---|
| 433 | use Errno;
|
|---|
| 434 |
|
|---|
| 435 | unless (open(FH, "/fangorn/spouse")) {
|
|---|
| 436 | if ($!{ENOENT}) {
|
|---|
| 437 | warn "Get a wife!\n";
|
|---|
| 438 | } else {
|
|---|
| 439 | warn "This path is barred: $!";
|
|---|
| 440 | }
|
|---|
| 441 | }
|
|---|
| 442 |
|
|---|
| 443 | If a specified constant C<EFOO> does not exist on the system, C<$!{EFOO}>
|
|---|
| 444 | returns C<"">. You may use C<exists $!{EFOO}> to check whether the
|
|---|
| 445 | constant is available on the system.
|
|---|
| 446 |
|
|---|
| 447 | =head1 CAVEATS
|
|---|
| 448 |
|
|---|
| 449 | Importing a particular constant may not be very portable, because the
|
|---|
| 450 | import will fail on platforms that do not have that constant. A more
|
|---|
| 451 | portable way to set C<$!> to a valid value is to use:
|
|---|
| 452 |
|
|---|
| 453 | if (exists &Errno::EFOO) {
|
|---|
| 454 | $! = &Errno::EFOO;
|
|---|
| 455 | }
|
|---|
| 456 |
|
|---|
| 457 | =head1 AUTHOR
|
|---|
| 458 |
|
|---|
| 459 | Graham Barr <[email protected]>
|
|---|
| 460 |
|
|---|
| 461 | =head1 COPYRIGHT
|
|---|
| 462 |
|
|---|
| 463 | Copyright (c) 1997-8 Graham Barr. All rights reserved.
|
|---|
| 464 | This program is free software; you can redistribute it and/or modify it
|
|---|
| 465 | under the same terms as Perl itself.
|
|---|
| 466 |
|
|---|
| 467 | =cut
|
|---|
| 468 |
|
|---|
| 469 | ESQ
|
|---|
| 470 |
|
|---|
| 471 | }
|
|---|
