--- /dev/null
+case $CONFIG in
+'')
+ if test ! -f config.sh; then
+ ln ../config.sh . || \
+ ln ../../config.sh . || \
+ ln ../../../config.sh . || \
+ (echo "Can't find config.sh."; exit 1)
+ fi
+ . config.sh
+ ;;
+esac
+: This forces SH files to create target in same directory as SH file.
+: This is so that make depend always knows where to find SH derivatives.
+case "$0" in
+*/*) cd `expr X$0 : 'X\(.*\)/'` ;;
+esac
+echo "Extracting c2ph (with variable substitutions)"
+: This section of the file will have variable substitutions done on it.
+: Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
+: Protect any dollar signs and backticks that you do not want interpreted
+: by putting a backslash in front. You may delete these comments.
+$spitshell >c2ph <<!GROK!THIS!
+#!$bin/perl
+#
+!GROK!THIS!
+
+: In the following dollars and backticks do not need the extra backslash.
+$spitshell >>c2ph <<'!NO!SUBS!'
+#
+# c2ph (aka pstruct)
+# Tom Christiansen, <tchrist@convex.com>
+#
+# As pstruct, dump C structures as generated from 'cc -g -S' stabs.
+# As c2ph, do this PLUS generate perl code for getting at the structures.
+#
+# See the usage message for more. If this isn't enough, read the code.
+#
+
+$RCSID = '$RCSfile: c2ph.SH,v $$Revision: 4.0.1.1 $$Date: 91/11/05 16:02:29 $';
+
+
+######################################################################
+
+# some handy data definitions. many of these can be reset later.
+
+$bitorder = 'b'; # ascending; set to B for descending bit fields
+
+%intrinsics =
+%template = (
+ 'char', 'c',
+ 'unsigned char', 'C',
+ 'short', 's',
+ 'short int', 's',
+ 'unsigned short', 'S',
+ 'unsigned short int', 'S',
+ 'short unsigned int', 'S',
+ 'int', 'i',
+ 'unsigned int', 'I',
+ 'long', 'l',
+ 'long int', 'l',
+ 'unsigned long', 'L',
+ 'unsigned long', 'L',
+ 'long unsigned int', 'L',
+ 'unsigned long int', 'L',
+ 'long long', 'q',
+ 'long long int', 'q',
+ 'unsigned long long', 'Q',
+ 'unsigned long long int', 'Q',
+ 'float', 'f',
+ 'double', 'd',
+ 'pointer', 'p',
+ 'null', 'x',
+ 'neganull', 'X',
+ 'bit', $bitorder,
+);
+
+&buildscrunchlist;
+delete $intrinsics{'neganull'};
+delete $intrinsics{'bit'};
+delete $intrinsics{'null'};
+
+# use -s to recompute sizes
+%sizeof = (
+ 'char', '1',
+ 'unsigned char', '1',
+ 'short', '2',
+ 'short int', '2',
+ 'unsigned short', '2',
+ 'unsigned short int', '2',
+ 'short unsigned int', '2',
+ 'int', '4',
+ 'unsigned int', '4',
+ 'long', '4',
+ 'long int', '4',
+ 'unsigned long', '4',
+ 'unsigned long int', '4',
+ 'long unsigned int', '4',
+ 'long long', '8',
+ 'long long int', '8',
+ 'unsigned long long', '8',
+ 'unsigned long long int', '8',
+ 'float', '4',
+ 'double', '8',
+ 'pointer', '4',
+);
+
+($type_width, $member_width, $offset_width, $size_width) = (20, 20, 6, 5);
+
+($offset_fmt, $size_fmt) = ('d', 'd');
+
+$indent = 2;
+
+$CC = 'cc';
+$CFLAGS = '-g -S';
+$DEFINES = '';
+
+$perl++ if $0 =~ m#/?c2ph$#;
+
+require 'getopts.pl';
+
+eval '$'.$1.'$2;' while $ARGV[0] =~ /^([A-Za-z_]+=)(.*)/ && shift;
+
+&Getopts('aixdpvtnws:') || &usage(0);
+
+$opt_d && $debug++;
+$opt_t && $trace++;
+$opt_p && $perl++;
+$opt_v && $verbose++;
+$opt_n && ($perl = 0);
+
+if ($opt_w) {
+ ($type_width, $member_width, $offset_width) = (45, 35, 8);
+}
+if ($opt_x) {
+ ($offset_fmt, $offset_width, $size_fmt, $size_width) = ( 'x', '08', 'x', 04 );
+}
+
+eval '$'.$1.'$2;' while $ARGV[0] =~ /^([A-Za-z_]+=)(.*)/ && shift;
+
+sub PLUMBER {
+ select(STDERR);
+ print "oops, apperent pager foulup\n";
+ $isatty++;
+ &usage(1);
+}
+
+sub usage {
+ local($oops) = @_;
+ unless (-t STDOUT) {
+ select(STDERR);
+ } elsif (!$oops) {
+ $isatty++;
+ $| = 1;
+ print "hit <RETURN> for further explanation: ";
+ <STDIN>;
+ open (PIPE, "|". ($ENV{PAGER} || 'more'));
+ $SIG{PIPE} = PLUMBER;
+ select(PIPE);
+ }
+
+ print "usage: $0 [-dpnP] [var=val] [files ...]\n";
+
+ exit unless $isatty;
+
+ print <<EOF;
+
+Options:
+
+-w wide; short for: type_width=45 member_width=35 offset_width=8
+-x hex; short for: offset_fmt=x offset_width=08 size_fmt=x size_width=04
+
+-n do not generate perl code (default when invoked as pstruct)
+-p generate perl code (default when invoked as c2ph)
+-v generate perl code, with C decls as comments
+
+-i do NOT recompute sizes for intrinsic datatypes
+-a dump information on intrinsics also
+
+-t trace execution
+-d spew reams of debugging output
+
+-slist give comma-separated list a structures to dump
+
+
+Var Name Default Value Meaning
+
+EOF
+
+ &defvar('CC', 'which_compiler to call');
+ &defvar('CFLAGS', 'how to generate *.s files with stabs');
+ &defvar('DEFINES','any extra cflags or cpp defines, like -I, -D, -U');
+
+ print "\n";
+
+ &defvar('type_width', 'width of type field (column 1)');
+ &defvar('member_width', 'width of member field (column 2)');
+ &defvar('offset_width', 'width of offset field (column 3)');
+ &defvar('size_width', 'width of size field (column 4)');
+
+ print "\n";
+
+ &defvar('offset_fmt', 'sprintf format type for offset');
+ &defvar('size_fmt', 'sprintf format type for size');
+
+ print "\n";
+
+ &defvar('indent', 'how far to indent each nesting level');
+
+ print <<'EOF';
+
+ If any *.[ch] files are given, these will be catted together into
+ a temporary *.c file and sent through:
+ $CC $CFLAGS $DEFINES
+ and the resulting *.s groped for stab information. If no files are
+ supplied, then stdin is read directly with the assumption that it
+ contains stab information. All other liens will be ignored. At
+ most one *.s file should be supplied.
+
+EOF
+ close PIPE;
+ exit 1;
+}
+
+sub defvar {
+ local($var, $msg) = @_;
+ printf "%-16s%-15s %s\n", $var, eval "\$$var", $msg;
+}
+
+$recurse = 1;
+
+if (@ARGV) {
+ if (grep(!/\.[csh]$/,@ARGV)) {
+ warn "Only *.[csh] files expected!\n";
+ &usage;
+ }
+ elsif (grep(/\.s$/,@ARGV)) {
+ if (@ARGV > 1) {
+ warn "Only one *.s file allowed!\n";
+ &usage;
+ }
+ }
+ elsif (@ARGV == 1 && $ARGV[0] =~ /\.c$/) {
+ local($dir, $file) = $ARGV[0] =~ m#(.*/)?(.*)$#;
+ $chdir = "cd $dir; " if $dir;
+ &system("$chdir$CC $CFLAGS $DEFINES $file") && exit 1;
+ $ARGV[0] =~ s/\.c$/.s/;
+ }
+ else {
+ $TMP = "/tmp/c2ph.$$.c";
+ &system("cat @ARGV > $TMP") && exit 1;
+ &system("cd /tmp; $CC $CFLAGS $DEFINES $TMP") && exit 1;
+ unlink $TMP;
+ $TMP =~ s/\.c$/.s/;
+ @ARGV = ($TMP);
+ }
+}
+
+if ($opt_s) {
+ for (split(/[\s,]+/, $opt_s)) {
+ $interested{$_}++;
+ }
+}
+
+
+$| = 1 if $debug;
+
+main: {
+
+ if ($trace) {
+ if (-t && !@ARGV) {
+ print STDERR "reading from your keyboard: ";
+ } else {
+ print STDERR "reading from " . (@ARGV ? "@ARGV" : "<STDIN>").": ";
+ }
+ }
+
+STAB: while (<>) {
+ if ($trace && !($. % 10)) {
+ $lineno = $..'';
+ print STDERR $lineno, "\b" x length($lineno);
+ }
+ next unless /^\s*\.stabs\s+/;
+ $line = $_;
+ s/^\s*\.stabs\s+//;
+ &stab;
+ }
+ print STDERR "$.\n" if $trace;
+ unlink $TMP if $TMP;
+
+ &compute_intrinsics if $perl && !$opt_i;
+
+ print STDERR "resolving types\n" if $trace;
+
+ &resolve_types;
+ &adjust_start_addrs;
+
+ $sum = 2 + $type_width + $member_width;
+ $pmask1 = "%-${type_width}s %-${member_width}s";
+ $pmask2 = "%-${sum}s %${offset_width}${offset_fmt}%s %${size_width}${size_fmt}%s";
+
+ if ($perl) {
+ # resolve template -- should be in stab define order, but even this isn't enough.
+ print STDERR "\nbuilding type templates: " if $trace;
+ for $i (reverse 0..$#type) {
+ next unless defined($name = $type[$i]);
+ next unless defined $struct{$name};
+ $build_recursed = 0;
+ &build_template($name) unless defined $template{&psou($name)} ||
+ $opt_s && !$interested{$name};
+ }
+ print STDERR "\n\n" if $trace;
+ }
+
+ print STDERR "dumping structs: " if $trace;
+
+
+ foreach $name (sort keys %struct) {
+ next if $opt_s && !$interested{$name};
+ print STDERR "$name " if $trace;
+
+ undef @sizeof;
+ undef @typedef;
+ undef @offsetof;
+ undef @indices;
+ undef @typeof;
+
+ $mname = &munge($name);
+
+ $fname = &psou($name);
+
+ print "# " if $perl && $verbose;
+ $pcode = '';
+ print "$fname {\n" if !$perl || $verbose;
+ $template{$fname} = &scrunch($template{$fname}) if $perl;
+ &pstruct($name,$name,0);
+ print "# " if $perl && $verbose;
+ print "}\n" if !$perl || $verbose;
+ print "\n" if $perl && $verbose;
+
+ if ($perl) {
+ print "$pcode";
+
+ printf("\nsub %-32s { %4d; }\n\n", "${mname}'struct", $countof{$name});
+
+ print <<EOF;
+sub ${mname}'typedef {
+ local(\$${mname}'index) = shift;
+ defined \$${mname}'index
+ ? \$${mname}'typedef[\$${mname}'index]
+ : \$${mname}'typedef;
+}
+EOF
+
+ print <<EOF;
+sub ${mname}'sizeof {
+ local(\$${mname}'index) = shift;
+ defined \$${mname}'index
+ ? \$${mname}'sizeof[\$${mname}'index]
+ : \$${mname}'sizeof;
+}
+EOF
+
+ print <<EOF;
+sub ${mname}'offsetof {
+ local(\$${mname}'index) = shift;
+ defined \$${mname}index
+ ? \$${mname}'offsetof[\$${mname}'index]
+ : \$${mname}'sizeof;
+}
+EOF
+
+ print <<EOF;
+sub ${mname}'typeof {
+ local(\$${mname}'index) = shift;
+ defined \$${mname}index
+ ? \$${mname}'typeof[\$${mname}'index]
+ : '$name';
+}
+EOF
+
+
+ print "\$${mname}'typedef = '" . &scrunch($template{$fname})
+ . "';\n";
+
+ print "\$${mname}'sizeof = $sizeof{$name};\n\n";
+
+
+ print "\@${mname}'indices = (", &squishseq(@indices), ");\n";
+
+ print "\n";
+
+ print "\@${mname}'typedef[\@${mname}'indices] = (",
+ join("\n\t", '', @typedef), "\n );\n\n";
+ print "\@${mname}'sizeof[\@${mname}'indices] = (",
+ join("\n\t", '', @sizeof), "\n );\n\n";
+ print "\@${mname}'offsetof[\@${mname}'indices] = (",
+ join("\n\t", '', @offsetof), "\n );\n\n";
+ print "\@${mname}'typeof[\@${mname}'indices] = (",
+ join("\n\t", '', @typeof), "\n );\n\n";
+
+ $template_printed{$fname}++;
+ $size_printed{$fname}++;
+ }
+ print "\n";
+ }
+
+ print STDERR "\n" if $trace;
+
+ unless ($perl && $opt_a) {
+ print "\n1;\n";
+ exit;
+ }
+
+
+
+ foreach $name (sort bysizevalue keys %intrinsics) {
+ next if $size_printed{$name};
+ print '$',&munge($name),"'sizeof = ", $sizeof{$name}, ";\n";
+ }
+
+ print "\n";
+
+ sub bysizevalue { $sizeof{$a} <=> $sizeof{$b}; }
+
+
+ foreach $name (sort keys %intrinsics) {
+ print '$',&munge($name),"'typedef = '", $template{$name}, "';\n";
+ }
+
+ print "\n1;\n";
+
+ exit;
+}
+
+########################################################################################
+
+
+sub stab {
+ next unless /:[\$\w]+(\(\d+,\d+\))?=[\*\$\w]+/; # (\d+,\d+) is for sun
+ s/"// || next;
+ s/",([x\d]+),([x\d]+),([x\d]+),.*// || next;
+
+ next if /^\s*$/;
+
+ $size = $3 if $3;
+
+
+ $line = $_;
+
+ if (($name, $pdecl) = /^([\$ \w]+):[tT]((\d+)(=[rufs*](\d+))+)$/) {
+ print "$name is a typedef for some funky pointers: $pdecl\n" if $debug;
+ &pdecl($pdecl);
+ next;
+ }
+
+
+
+ if (/(([ \w]+):t(\d+|\(\d+,\d+\)))=r?(\d+|\(\d+,\d+\))(;\d+;\d+;)?/) {
+ local($ident) = $2;
+ push(@intrinsics, $ident);
+ $typeno = &typeno($3);
+ $type[$typeno] = $ident;
+ print STDERR "intrinsic $ident in new type $typeno\n" if $debug;
+ next;
+ }
+
+ if (($name, $typeordef, $typeno, $extra, $struct, $_)
+ = /^([\$ \w]+):([ustT])(\d+|\(\d+,\d+\))(=[rufs*](\d+))?(.*)$/)
+ {
+ $typeno = &typeno($typeno); # sun foolery
+ }
+ elsif (/^[\$\w]+:/) {
+ next; # variable
+ }
+ else {
+ warn "can't grok stab: <$_> in: $line " if $_;
+ next;
+ }
+
+ #warn "got size $size for $name\n";
+ $sizeof{$name} = $size if $size;
+
+ s/;[-\d]*;[-\d]*;$//; # we don't care about ranges
+
+ $typenos{$name} = $typeno;
+
+ unless (defined $type[$typeno]) {
+ &panic("type 0??") unless $typeno;
+ $type[$typeno] = $name unless defined $type[$typeno];
+ printf "new type $typeno is $name" if $debug;
+ if ($extra =~ /\*/ && defined $type[$struct]) {
+ print ", a typedef for a pointer to " , $type[$struct] if $debug;
+ }
+ } else {
+ printf "%s is type %d", $name, $typeno if $debug;
+ print ", a typedef for " , $type[$typeno] if $debug;
+ }
+ print "\n" if $debug;
+ #next unless $extra =~ /[su*]/;
+
+ #$type[$struct] = $name;
+
+ if ($extra =~ /[us*]/) {
+ &sou($name, $extra);
+ $_ = &sdecl($name, $_, 0);
+ }
+ elsif (/^=ar/) {
+ print "it's a bare array typedef -- that's pretty sick\n" if $debug;
+ $_ = "$typeno$_";
+ $scripts = '';
+ $_ = &adecl($_,1);
+
+ }
+ elsif (s/((\w+):t(\d+|\(\d+,\d+\)))?=r?(;\d+;\d+;)?//) { # the ?'s are for gcc
+ push(@intrinsics, $2);
+ $typeno = &typeno($3);
+ $type[$typeno] = $2;
+ print STDERR "intrinsic $2 in new type $typeno\n" if $debug;
+ }
+ elsif (s/^=e//) { # blessed by thy compiler; mine won't do this
+ &edecl;
+ }
+ else {
+ warn "Funny remainder for $name on line $_ left in $line " if $_;
+ }
+}
+
+sub typeno { # sun thinks types are (0,27) instead of just 27
+ local($_) = @_;
+ s/\(\d+,(\d+)\)/$1/;
+ $_;
+}
+
+sub pstruct {
+ local($what,$prefix,$base) = @_;
+ local($field, $fieldname, $typeno, $count, $offset, $entry);
+ local($fieldtype);
+ local($type, $tname);
+ local($mytype, $mycount, $entry2);
+ local($struct_count) = 0;
+ local($pad, $revpad, $length, $prepad, $lastoffset, $lastlength, $fmt);
+ local($bits,$bytes);
+ local($template);
+
+
+ local($mname) = &munge($name);
+
+ sub munge {
+ local($_) = @_;
+ s/[\s\$\.]/_/g;
+ $_;
+ }
+
+ local($sname) = &psou($what);
+
+ $nesting++;
+
+ for $field (split(/;/, $struct{$what})) {
+ $pad = $prepad = 0;
+ $entry = '';
+ ($fieldname, $typeno, $count, $offset, $length) = split(/,/, $field);
+
+ $type = $type[$typeno];
+
+ $type =~ /([^[]*)(\[.*\])?/;
+ $mytype = $1;
+ $count .= $2;
+ $fieldtype = &psou($mytype);
+
+ local($fname) = &psou($name);
+
+ if ($build_templates) {
+
+ $pad = ($offset - ($lastoffset + $lastlength))/8
+ if defined $lastoffset;
+
+ if (! $finished_template{$sname}) {
+ if ($isaunion{$what}) {
+ $template{$sname} .= 'X' x $revpad . ' ' if $revpad;
+ } else {
+ $template{$sname} .= 'x' x $pad . ' ' if $pad;
+ }
+ }
+
+ $template = &fetch_template($type) x
+ ($count ? &scripts2count($count) : 1);
+
+ if (! $finished_template{$sname}) {
+ $template{$sname} .= $template;
+ }
+
+ $revpad = $length/8 if $isaunion{$what};
+
+ ($lastoffset, $lastlength) = ($offset, $length);
+
+ } else {
+ print '# ' if $perl && $verbose;
+ $entry = sprintf($pmask1,
+ ' ' x ($nesting * $indent) . $fieldtype,
+ "$prefix.$fieldname" . $count);
+
+ $entry =~ s/(\*+)( )/$2$1/;
+
+ printf $pmask2,
+ $entry,
+ ($base+$offset)/8,
+ ($bits = ($base+$offset)%8) ? ".$bits" : " ",
+ $length/8,
+ ($bits = $length % 8) ? ".$bits": ""
+ if !$perl || $verbose;
+
+
+ if ($perl && $nesting == 1) {
+ $template = &scrunch(&fetch_template($type) x
+ ($count ? &scripts2count($count) : 1));
+ push(@sizeof, int($length/8) .",\t# $fieldname");
+ push(@offsetof, int($offset/8) .",\t# $fieldname");
+ push(@typedef, "'$template', \t# $fieldname");
+ $type =~ s/(struct|union) //;
+ push(@typeof, "'$type" . ($count ? $count : '') .
+ "',\t# $fieldname");
+ }
+
+ print ' ', ' ' x $indent x $nesting, $template
+ if $perl && $verbose;
+
+ print "\n" if !$perl || $verbose;
+
+ }
+ if ($perl) {
+ local($mycount) = defined $struct{$mytype} ? $countof{$mytype} : 1;
+ $mycount *= &scripts2count($count) if $count;
+ if ($nesting==1 && !$build_templates) {
+ $pcode .= sprintf("sub %-32s { %4d; }\n",
+ "${mname}'${fieldname}", $struct_count);
+ push(@indices, $struct_count);
+ }
+ $struct_count += $mycount;
+ }
+
+
+ &pstruct($type, "$prefix.$fieldname", $base+$offset)
+ if $recurse && defined $struct{$type};
+ }
+
+ $countof{$what} = $struct_count unless defined $countof{$whati};
+
+ $template{$sname} .= '$' if $build_templates;
+ $finished_template{$sname}++;
+
+ if ($build_templates && !defined $sizeof{$name}) {
+ local($fmt) = &scrunch($template{$sname});
+ print STDERR "no size for $name, punting with $fmt..." if $debug;
+ eval '$sizeof{$name} = length(pack($fmt, ()))';
+ if ($@) {
+ chop $@;
+ warn "couldn't get size for \$name: $@";
+ } else {
+ print STDERR $sizeof{$name}, "\n" if $debUg;
+ }
+ }
+
+ --$nesting;
+}
+
+
+sub psize {
+ local($me) = @_;
+ local($amstruct) = $struct{$me} ? 'struct ' : '';
+
+ print '$sizeof{\'', $amstruct, $me, '\'} = ';
+ printf "%d;\n", $sizeof{$me};
+}
+
+sub pdecl {
+ local($pdecl) = @_;
+ local(@pdecls);
+ local($tname);
+
+ warn "pdecl: $pdecl\n" if $debug;
+
+ $pdecl =~ s/\(\d+,(\d+)\)/$1/g;
+ $pdecl =~ s/\*//g;
+ @pdecls = split(/=/, $pdecl);
+ $typeno = $pdecls[0];
+ $tname = pop @pdecls;
+
+ if ($tname =~ s/^f//) { $tname = "$tname&"; }
+ #else { $tname = "$tname*"; }
+
+ for (reverse @pdecls) {
+ $tname .= s/^f// ? "&" : "*";
+ #$tname =~ s/^f(.*)/$1&/;
+ print "type[$_] is $tname\n" if $debug;
+ $type[$_] = $tname unless defined $type[$_];
+ }
+}
+
+
+
+sub adecl {
+ ($arraytype, $unknown, $lower, $upper) = ();
+ #local($typeno);
+ # global $typeno, @type
+ local($_, $typedef) = @_;
+
+ while (s/^((\d+)=)?ar(\d+);//) {
+ ($arraytype, $unknown) = ($2, $3);
+ if (s/^(\d+);(\d+);//) {
+ ($lower, $upper) = ($1, $2);
+ $scripts .= '[' . ($upper+1) . ']';
+ } else {
+ warn "can't find array bounds: $_";
+ }
+ }
+ if (s/^([\d*f=]*),(\d+),(\d+);//) {
+ ($start, $length) = ($2, $3);
+ local($whatis) = $1;
+ if ($whatis =~ /^(\d+)=/) {
+ $typeno = $1;
+ &pdecl($whatis);
+ } else {
+ $typeno = $whatis;
+ }
+ } elsif (s/^(\d+)(=[*suf]\d*)//) {
+ local($whatis) = $2;
+
+ if ($whatis =~ /[f*]/) {
+ &pdecl($whatis);
+ } elsif ($whatis =~ /[su]/) { #
+ print "$prefix.$fieldname is an array$scripts anon structs; disgusting\n"
+ if $debug;
+ #$type[$typeno] = $name unless defined $type[$typeno];
+ ##printf "new type $typeno is $name" if $debug;
+ $typeno = $1;
+ $type[$typeno] = "$prefix.$fieldname";
+ local($name) = $type[$typeno];
+ &sou($name, $whatis);
+ $_ = &sdecl($name, $_, $start+$offset);
+ 1;
+ $start = $start{$name};
+ $offset = $sizeof{$name};
+ $length = $offset;
+ } else {
+ warn "what's this? $whatis in $line ";
+ }
+ } elsif (/^\d+$/) {
+ $typeno = $_;
+ } else {
+ warn "bad array stab: $_ in $line ";
+ next STAB;
+ }
+ #local($wasdef) = defined($type[$typeno]) && $debug;
+ #if ($typedef) {
+ #print "redefining $type[$typeno] to " if $wasdef;
+ #$type[$typeno] = "$whatis$scripts"; # unless defined $type[$typeno];
+ #print "$type[$typeno]\n" if $wasdef;
+ #} else {
+ #$type[$arraytype] = $type[$typeno] unless defined $type[$arraytype];
+ #}
+ $type[$arraytype] = "$type[$typeno]$scripts" if defined $type[$typeno];
+ print "type[$arraytype] is $type[$arraytype]\n" if $debug;
+ print "$prefix.$fieldname is an array of $type[$arraytype]\n" if $debug;
+ $_;
+}
+
+
+
+sub sdecl {
+ local($prefix, $_, $offset) = @_;
+
+ local($fieldname, $scripts, $type, $arraytype, $unknown,
+ $whatis, $pdecl, $upper,$lower, $start,$length) = ();
+ local($typeno,$sou);
+
+
+SFIELD:
+ while (/^([^;]+);/) {
+ $scripts = '';
+ warn "sdecl $_\n" if $debug;
+ if (s/^([\$\w]+)://) {
+ $fieldname = $1;
+ } elsif (s/(\d+)=([us])(\d+|\(\d+,\d+\))//) { #
+ $typeno = &typeno($1);
+ $type[$typeno] = "$prefix.$fieldname";
+ local($name) = "$prefix.$fieldname";
+ &sou($name,$2);
+ $_ = &sdecl("$prefix.$fieldname", $_, $start+$offset);
+ $start = $start{$name};
+ $offset += $sizeof{$name};
+ #print "done with anon, start is $start, offset is $offset\n";
+ #next SFIELD;
+ } else {
+ warn "weird field $_ of $line" if $debug;
+ next STAB;
+ #$fieldname = &gensym;
+ #$_ = &sdecl("$prefix.$fieldname", $_, $start+$offset);
+ }
+
+ if (/^\d+=ar/) {
+ $_ = &adecl($_);
+ }
+ elsif (s/^(\d+|\(\d+,\d+\))?,(\d+),(\d+);//) {
+ ($start, $length) = ($2, $3);
+ &panic("no length?") unless $length;
+ $typeno = &typeno($1) if $1;
+ }
+ elsif (s/^((\d+|\(\d+,\d+\))(=[*f](\d+|\(\d+,\d+\)))+),(\d+),(\d+);//) {
+ ($pdecl, $start, $length) = ($1,$5,$6);
+ &pdecl($pdecl);
+ }
+ elsif (s/(\d+)=([us])(\d+|\(\d+,\d+\))//) { # the dratted anon struct
+ ($typeno, $sou) = ($1, $2);
+ $typeno = &typeno($typeno);
+ if (defined($type[$typeno])) {
+ warn "now how did we get type $1 in $fieldname of $line?";
+ } else {
+ print "anon type $typeno is $prefix.$fieldname\n" if $debug;
+ $type[$typeno] = "$prefix.$fieldname" unless defined $type[$typeno];
+ };
+ local($name) = "$prefix.$fieldname";
+ &sou($name,$sou);
+ print "anon ".($isastruct{$name}) ? "struct":"union"." for $prefix.$fieldname\n" if $debug;
+ $type[$typeno] = "$prefix.$fieldname";
+ $_ = &sdecl("$prefix.$fieldname", $_, $start+$offset);
+ $start = $start{$name};
+ $length = $sizeof{$name};
+ }
+ else {
+ warn "can't grok stab for $name ($_) in line $line ";
+ next STAB;
+ }
+
+ &panic("no length for $prefix.$fieldname") unless $length;
+ $struct{$name} .= join(',', $fieldname, $typeno, $scripts, $start, $length) . ';';
+ }
+ if (s/;\d*,(\d+),(\d+);//) {
+ local($start, $size) = ($1, $2);
+ $sizeof{$prefix} = $size;
+ print "start of $prefix is $start, size of $sizeof{$prefix}\n" if $debug;
+ $start{$prefix} = $start;
+ }
+ $_;
+}
+
+sub edecl {
+ s/;$//;
+ $enum{$name} = $_;
+ $_ = '';
+}
+
+sub resolve_types {
+ local($sou);
+ for $i (0 .. $#type) {
+ next unless defined $type[$i];
+ $_ = $type[$i];
+ unless (/\d/) {
+ print "type[$i] $type[$i]\n" if $debug;
+ next;
+ }
+ print "type[$i] $_ ==> " if $debug;
+ s/^(\d+)(\**)\&\*(\**)/"$2($3".&type($1) . ')()'/e;
+ s/^(\d+)\&/&type($1)/e;
+ s/^(\d+)/&type($1)/e;
+ s/(\*+)([^*]+)(\*+)/$1$3$2/;
+ s/\((\*+)(\w+)(\*+)\)/$3($1$2)/;
+ s/^(\d+)([\*\[].*)/&type($1).$2/e;
+ #s/(\d+)(\*|(\[[\[\]\d\*]+]\])+)/&type($1).$2/ge;
+ $type[$i] = $_;
+ print "$_\n" if $debug;
+ }
+}
+sub type { &psou($type[$_[0]] || "<UNDEFINED>"); }
+
+sub adjust_start_addrs {
+ for (sort keys %start) {
+ ($basename = $_) =~ s/\.[^.]+$//;
+ $start{$_} += $start{$basename};
+ print "start: $_ @ $start{$_}\n" if $debug;
+ }
+}
+
+sub sou {
+ local($what, $_) = @_;
+ /u/ && $isaunion{$what}++;
+ /s/ && $isastruct{$what}++;
+}
+
+sub psou {
+ local($what) = @_;
+ local($prefix) = '';
+ if ($isaunion{$what}) {
+ $prefix = 'union ';
+ } elsif ($isastruct{$what}) {
+ $prefix = 'struct ';
+ }
+ $prefix . $what;
+}
+
+sub scrunch {
+ local($_) = @_;
+
+ study;
+
+ s/\$//g;
+ s/ / /g;
+ 1 while s/(\w) \1/$1$1/g;
+
+ # i wanna say this, but perl resists my efforts:
+ # s/(\w)(\1+)/$2 . length($1)/ge;
+
+ &quick_scrunch;
+
+ s/ $//;
+
+ $_;
+}
+
+sub buildscrunchlist {
+ $scrunch_code = "sub quick_scrunch {\n";
+ for (values %intrinsics) {
+ $scrunch_code .= "\ts/($_{2,})/'$_' . length(\$1)/ge;\n";
+ }
+ $scrunch_code .= "}\n";
+ print "$scrunch_code" if $debug;
+ eval $scrunch_code;
+ &panic("can't eval scrunch_code $@ \nscrunch_code") if $@;
+}
+
+sub fetch_template {
+ local($mytype) = @_;
+ local($fmt);
+ local($count) = 1;
+
+ &panic("why do you care?") unless $perl;
+
+ if ($mytype =~ s/(\[\d+\])+$//) {
+ $count .= $1;
+ }
+
+ if ($mytype =~ /\*/) {
+ $fmt = $template{'pointer'};
+ }
+ elsif (defined $template{$mytype}) {
+ $fmt = $template{$mytype};
+ }
+ elsif (defined $struct{$mytype}) {
+ if (!defined $template{&psou($mytype)}) {
+ &build_template($mytype) unless $mytype eq $name;
+ }
+ elsif ($template{&psou($mytype)} !~ /\$$/) {
+ #warn "incomplete template for $mytype\n";
+ }
+ $fmt = $template{&psou($mytype)} || '?';
+ }
+ else {
+ warn "unknown fmt for $mytype\n";
+ $fmt = '?';
+ }
+
+ $fmt x $count . ' ';
+}
+
+sub compute_intrinsics {
+ local($TMP) = "/tmp/c2ph-i.$$.c";
+ open (TMP, ">$TMP") || die "can't open $TMP: $!";
+ select(TMP);
+
+ print STDERR "computing intrinsic sizes: " if $trace;
+
+ undef %intrinsics;
+
+ print <<'EOF';
+main() {
+ char *mask = "%d %s\n";
+EOF
+
+ for $type (@intrinsics) {
+ next if $type eq 'void';
+ print <<"EOF";
+ printf(mask,sizeof($type), "$type");
+EOF
+ }
+
+ print <<'EOF';
+ printf(mask,sizeof(char *), "pointer");
+ exit(0);
+}
+EOF
+ close TMP;
+
+ select(STDOUT);
+ open(PIPE, "cd /tmp && $CC $TMP && /tmp/a.out|");
+ while (<PIPE>) {
+ chop;
+ split(' ',$_,2);;
+ print "intrinsic $_[1] is size $_[0]\n" if $debug;
+ $sizeof{$_[1]} = $_[0];
+ $intrinsics{$_[1]} = $template{$_[0]};
+ }
+ close(PIPE) || die "couldn't read intrinsics!";
+ unlink($TMP, '/tmp/a.out');
+ print STDERR "done\n" if $trace;
+}
+
+sub scripts2count {
+ local($_) = @_;
+
+ s/^\[//;
+ s/\]$//;
+ s/\]\[/*/g;
+ $_ = eval;
+ &panic("$_: $@") if $@;
+ $_;
+}
+
+sub system {
+ print STDERR "@_\n" if $trace;
+ system @_;
+}
+
+sub build_template {
+ local($name) = @_;
+
+ &panic("already got a template for $name") if defined $template{$name};
+
+ local($build_templates) = 1;
+
+ local($lparen) = '(' x $build_recursed;
+ local($rparen) = ')' x $build_recursed;
+
+ print STDERR "$lparen$name$rparen " if $trace;
+ $build_recursed++;
+ &pstruct($name,$name,0);
+ print STDERR "TEMPLATE for $name is ", $template{&psou($name)}, "\n" if $debug;
+ --$build_recursed;
+}
+
+
+sub panic {
+
+ select(STDERR);
+
+ print "\npanic: @_\n";
+
+ exit 1 if $] <= 4.003; # caller broken
+
+ local($i,$_);
+ local($p,$f,$l,$s,$h,$a,@a,@sub);
+ for ($i = 0; ($p,$f,$l,$s,$h,$w) = caller($i); $i++) {
+ @a = @DB'args;
+ for (@a) {
+ if (/^StB\000/ && length($_) == length($_main{'_main'})) {
+ $_ = sprintf("%s",$_);
+ }
+ else {
+ s/'/\\'/g;
+ s/([^\0]*)/'$1'/ unless /^-?[\d.]+$/;
+ s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg;
+ s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg;
+ }
+ }
+ $w = $w ? '@ = ' : '$ = ';
+ $a = $h ? '(' . join(', ', @a) . ')' : '';
+ push(@sub, "$w&$s$a from file $f line $l\n");
+ last if $signal;
+ }
+ for ($i=0; $i <= $#sub; $i++) {
+ last if $signal;
+ print $sub[$i];
+ }
+ exit 1;
+}
+
+sub squishseq {
+ local($num);
+ local($last) = -1e8;
+ local($string);
+ local($seq) = '..';
+
+ while (defined($num = shift)) {
+ if ($num == ($last + 1)) {
+ $string .= $seq unless $inseq++;
+ $last = $num;
+ next;
+ } elsif ($inseq) {
+ $string .= $last unless $last == -1e8;
+ }
+
+ $string .= ',' if defined $string;
+ $string .= $num;
+ $last = $num;
+ $inseq = 0;
+ }
+ $string .= $last if $inseq && $last != -e18;
+ $string;
+}
+!NO!SUBS!
+$eunicefix c2ph
+rm -f pstruct
+ln c2ph pstruct
--- /dev/null
+Article 484 of comp.lang.perl:
+Xref: netlabs comp.lang.perl:484 comp.lang.c:983 alt.sources:134
+Path: netlabs!psinntp!iggy.GW.Vitalink.COM!lll-winken!sun-barr!cronkite.Central.Sun.COM!spdev!texsun!convex!tchrist
+From: tchrist@convex.com (Tom Christiansen)
+Newsgroups: comp.lang.perl,comp.lang.c,alt.sources
+Subject: pstruct -- a C structure formatter; AKA c2ph, a C to perl header translator
+Keywords: C perl tranlator
+Message-ID: <1991Jul25.081021.8104@convex.com>
+Date: 25 Jul 91 08:10:21 GMT
+Sender: usenet@convex.com (news access account)
+Followup-To: comp.lang.perl
+Organization: CONVEX Computer Corporation, Richardson, Tx., USA
+Lines: 1208
+Nntp-Posting-Host: pixel.convex.com
+
+Once upon a time, I wrote a program called pstruct. It was a perl
+program that tried to parse out C structures and display their member
+offsets for you. This was especially useful for people looking at
+binary dumps or poking around the kernel.
+
+Pstruct was not a pretty program. Neither was it particularly robust.
+The problem, you see, was that the C compiler was much better at parsing
+C than I could ever hope to be.
+
+So I got smart: I decided to be lazy and let the C compiler parse the C,
+which would spit out debugger stabs for me to read. These were much
+easier to parse. It's still not a pretty program, but at least it's more
+robust.
+
+Pstruct takes any .c or .h files, or preferably .s ones, since that's
+the format it is going to massage them into anyway, and spits out
+listings like this:
+
+struct tty {
+ int tty.t_locker 000 4
+ int tty.t_mutex_index 004 4
+ struct tty * tty.t_tp_virt 008 4
+ struct clist tty.t_rawq 00c 20
+ int tty.t_rawq.c_cc 00c 4
+ int tty.t_rawq.c_cmax 010 4
+ int tty.t_rawq.c_cfx 014 4
+ int tty.t_rawq.c_clx 018 4
+ struct tty * tty.t_rawq.c_tp_cpu 01c 4
+ struct tty * tty.t_rawq.c_tp_iop 020 4
+ unsigned char * tty.t_rawq.c_buf_cpu 024 4
+ unsigned char * tty.t_rawq.c_buf_iop 028 4
+ struct clist tty.t_canq 02c 20
+ int tty.t_canq.c_cc 02c 4
+ int tty.t_canq.c_cmax 030 4
+ int tty.t_canq.c_cfx 034 4
+ int tty.t_canq.c_clx 038 4
+ struct tty * tty.t_canq.c_tp_cpu 03c 4
+ struct tty * tty.t_canq.c_tp_iop 040 4
+ unsigned char * tty.t_canq.c_buf_cpu 044 4
+ unsigned char * tty.t_canq.c_buf_iop 048 4
+ struct clist tty.t_outq 04c 20
+ int tty.t_outq.c_cc 04c 4
+ int tty.t_outq.c_cmax 050 4
+ int tty.t_outq.c_cfx 054 4
+ int tty.t_outq.c_clx 058 4
+ struct tty * tty.t_outq.c_tp_cpu 05c 4
+ struct tty * tty.t_outq.c_tp_iop 060 4
+ unsigned char * tty.t_outq.c_buf_cpu 064 4
+ unsigned char * tty.t_outq.c_buf_iop 068 4
+ (*int)() tty.t_oproc_cpu 06c 4
+ (*int)() tty.t_oproc_iop 070 4
+ (*int)() tty.t_stopproc_cpu 074 4
+ (*int)() tty.t_stopproc_iop 078 4
+ struct thread * tty.t_rsel 07c 4
+
+ etc.
+
+
+Actually, this was generated by a particular set of options. You can control
+the formatting of each column, whether you prefer wide or fat, hex or decimal,
+leading zeroes or whatever.
+
+All you need to be able to use this is a C compiler than generates
+BSD/GCC-style stabs. The -g option on native BSD compilers and GCC
+should get this for you.
+
+To learn more, just type a bogus option, like -\?, and a long usage message
+will be provided. There are a fair number of possibilities.
+
+If you're only a C programmer, than this is the end of the message for you.
+You can quit right now, and if you care to, save off the source and run it
+when you feel like it. Or not.
+
+
+
+But if you're a perl programmer, then for you I have something much more
+wondrous than just a structure offset printer.
+
+You see, if you call pstruct by its other incybernation, c2ph, you have a code
+generator that translates C code into perl code! Well, structure and union
+declarations at least, but that's quite a bit.
+
+Prior to this point, anyone programming in perl who wanted to interact
+with C programs, like the kernel, was forced to guess the layouts of the C
+strutures, and then hardwire these into his program. Of course, when you
+took your wonderfully to a system where the sgtty structure was laid out
+differently, you program broke. Which is a shame.
+
+We've had Larry's h2ph translator, which helped, but that only works on
+cpp symbols, not real C, which was also very much needed. What I offer
+you is a symbolic way of getting at all the C structures. I've couched
+them in terms of packages and functions. Consider the following program:
+
+ #!/usr/local/bin/perl
+
+ require 'syscall.ph';
+ require 'sys/time.ph';
+ require 'sys/resource.ph';
+
+ $ru = "\0" x &rusage'sizeof();
+
+ syscall(&SYS_getrusage, &RUSAGE_SELF, $ru) && die "getrusage: $!";
+
+ @ru = unpack($t = &rusage'typedef(), $ru);
+
+ $utime = $ru[ &rusage'ru_utime + &timeval'tv_sec ]
+ + ($ru[ &rusage'ru_utime + &timeval'tv_usec ]) / 1e6;
+
+ $stime = $ru[ &rusage'ru_stime + &timeval'tv_sec ]
+ + ($ru[ &rusage'ru_stime + &timeval'tv_usec ]) / 1e6;
+
+ printf "you have used %8.3fs+%8.3fu seconds.\n", $utime, $stime;
+
+
+As you see, the name of the package is the name of the structure. Regular
+fields are just their own names. Plus the follwoing accessor functions are
+provided for your convenience:
+
+ struct This takes no arguments, and is merely the number of first-level
+ elements in the structure. You would use this for indexing
+ into arrays of structures, perhaps like this
+
+
+ $usec = $u[ &user'u_utimer
+ + (&ITIMER_VIRTUAL * &itimerval'struct)
+ + &itimerval'it_value
+ + &timeval'tv_usec
+ ];
+
+ sizeof Returns the bytes in the structure, or the member if
+ you pass it an argument, such as
+
+ &rusage'sizeof(&rusage'ru_utime)
+
+ typedef This is the perl format definition for passing to pack and
+ unpack. If you ask for the typedef of a nothing, you get
+ the whole structure, otherwise you get that of the member
+ you ask for. Padding is taken care of, as is the magic to
+ guarantee that a union is unpacked into all its aliases.
+ Bitfields are not quite yet supported however.
+
+ offsetof This function is the byte offset into the array of that
+ member. You may wish to use this for indexing directly
+ into the packed structure with vec() if you're too lazy
+ to unpack it.
+
+ typeof Not to be confused with the typedef accessor function, this
+ one returns the C type of that field. This would allow
+ you to print out a nice structured pretty print of some
+ structure without knoning anything about it beforehand.
+ No args to this one is a noop. Someday I'll post such
+ a thing to dump out your u structure for you.
+
+
+The way I see this being used is like basically this:
+
+ % h2ph <some_include_file.h > /usr/lib/perl/tmp.ph
+ % c2ph some_include_file.h >> /usr/lib/perl/tmp.ph
+ % install
+
+It's a little tricker with c2ph because you have to get the includes right.
+I can't know this for your system, but it's not usually too terribly difficult.
+
+The code isn't pretty as I mentioned -- I never thought it would be a 1000-
+line program when I started, or I might not have begun. :-) But I would have
+been less cavalier in how the parts of the program communicated with each
+other, etc. It might also have helped if I didn't have to divine the makeup
+of the stabs on the fly, and then account for micro differences between my
+compiler and gcc.
+
+Anyway, here it is. Should run on perl v4 or greater. Maybe less.
+
+
+--tom
+
+
--- /dev/null
+## chat.pl: chat with a server
+## V2.01.alpha.7 91/06/16
+## Randal L. Schwartz
+
+package chat;
+
+$sockaddr = 'S n a4 x8';
+chop($thishost = `hostname`); $thisaddr = (gethostbyname($thishost))[4];
+$thisproc = pack($sockaddr, 2, 0, $thisaddr);
+
+# *S = symbol for current I/O, gets assigned *chatsymbol....
+$next = "chatsymbol000000"; # next one
+$nextpat = "^chatsymbol"; # patterns that match next++, ++, ++, ++
+
+
+## $handle = &chat'open_port("server.address",$port_number);
+## opens a named or numbered TCP server
+
+sub open_port { ## public
+ local($server, $port) = @_;
+
+ local($serveraddr,$serverproc);
+
+ *S = ++$next;
+ if ($server =~ /^(\d+)+\.(\d+)\.(\d+)\.(\d+)$/) {
+ $serveraddr = pack('C4', $1, $2, $3, $4);
+ } else {
+ local(@x) = gethostbyname($server);
+ return undef unless @x;
+ $serveraddr = $x[4];
+ }
+ $serverproc = pack($sockaddr, 2, $port, $serveraddr);
+ unless (socket(S, 2, 1, 6)) {
+ # XXX hardwired $AF_SOCKET, $SOCK_STREAM, 'tcp'
+ # but who the heck would change these anyway? (:-)
+ ($!) = ($!, close(S)); # close S while saving $!
+ return undef;
+ }
+ unless (bind(S, $thisproc)) {
+ ($!) = ($!, close(S)); # close S while saving $!
+ return undef;
+ }
+ unless (connect(S, $serverproc)) {
+ ($!) = ($!, close(S)); # close S while saving $!
+ return undef;
+ }
+ select((select(S), $| = 1)[0]);
+ $next; # return symbol for switcharound
+}
+
+## ($host, $port, $handle) = &chat'open_listen([$port_number]);
+## opens a TCP port on the current machine, ready to be listened to
+## if $port_number is absent or zero, pick a default port number
+## process must be uid 0 to listen to a low port number
+
+sub open_listen { ## public
+
+ *S = ++$next;
+ local($thisport) = shift || 0;
+ local($thisproc_local) = pack($sockaddr, 2, $thisport, $thisaddr);
+ local(*NS) = "__" . time;
+ unless (socket(NS, 2, 1, 6)) {
+ # XXX hardwired $AF_SOCKET, $SOCK_STREAM, 'tcp'
+ # but who the heck would change these anyway? (:-)
+ ($!) = ($!, close(NS));
+ return undef;
+ }
+ unless (bind(NS, $thisproc_local)) {
+ ($!) = ($!, close(NS));
+ return undef;
+ }
+ unless (listen(NS, 1)) {
+ ($!) = ($!, close(NS));
+ return undef;
+ }
+ select((select(NS), $| = 1)[0]);
+ local($family, $port, @myaddr) =
+ unpack("S n C C C C x8", getsockname(NS));
+ $S{"needs_accept"} = *NS; # so expect will open it
+ (@myaddr, $port, $next); # returning this
+}
+
+## $handle = &chat'open_proc("command","arg1","arg2",...);
+## opens a /bin/sh on a pseudo-tty
+
+sub open_proc { ## public
+ local(@cmd) = @_;
+
+ *S = ++$next;
+ local(*TTY) = "__TTY" . time;
+ local($pty,$tty) = &_getpty(S,TTY);
+ die "Cannot find a new pty" unless defined $pty;
+ local($pid) = fork;
+ die "Cannot fork: $!" unless defined $pid;
+ unless ($pid) {
+ close STDIN; close STDOUT; close STDERR;
+ setpgrp(0,$$);
+ if (open(DEVTTY, "/dev/tty")) {
+ ioctl(DEVTTY,0x20007471,0); # XXX s/b &TIOCNOTTY
+ close DEVTTY;
+ }
+ open(STDIN,"<&TTY");
+ open(STDOUT,">&TTY");
+ open(STDERR,">&STDOUT");
+ die "Oops" unless fileno(STDERR) == 2; # sanity
+ close(S);
+ exec @cmd;
+ die "Cannot exec @cmd: $!";
+ }
+ close(TTY);
+ $next; # return symbol for switcharound
+}
+
+# $S is the read-ahead buffer
+
+## $return = &chat'expect([$handle,] $timeout_time,
+## $pat1, $body1, $pat2, $body2, ... )
+## $handle is from previous &chat'open_*().
+## $timeout_time is the time (either relative to the current time, or
+## absolute, ala time(2)) at which a timeout event occurs.
+## $pat1, $pat2, and so on are regexs which are matched against the input
+## stream. If a match is found, the entire matched string is consumed,
+## and the corresponding body eval string is evaled.
+##
+## Each pat is a regular-expression (probably enclosed in single-quotes
+## in the invocation). ^ and $ will work, respecting the current value of $*.
+## If pat is 'TIMEOUT', the body is executed if the timeout is exceeded.
+## If pat is 'EOF', the body is executed if the process exits before
+## the other patterns are seen.
+##
+## Pats are scanned in the order given, so later pats can contain
+## general defaults that won't be examined unless the earlier pats
+## have failed.
+##
+## The result of eval'ing body is returned as the result of
+## the invocation. Recursive invocations are not thought
+## through, and may work only accidentally. :-)
+##
+## undef is returned if either a timeout or an eof occurs and no
+## corresponding body has been defined.
+## I/O errors of any sort are treated as eof.
+
+$nextsubname = "expectloop000000"; # used for subroutines
+
+sub expect { ## public
+ if ($_[0] =~ /$nextpat/) {
+ *S = shift;
+ }
+ local($endtime) = shift;
+
+ local($timeout,$eof) = (1,1);
+ local($caller) = caller;
+ local($rmask, $nfound, $timeleft, $thisbuf);
+ local($cases, $pattern, $action, $subname);
+ $endtime += time if $endtime < 600_000_000;
+
+ if (defined $S{"needs_accept"}) { # is it a listen socket?
+ local(*NS) = $S{"needs_accept"};
+ delete $S{"needs_accept"};
+ $S{"needs_close"} = *NS;
+ unless(accept(S,NS)) {
+ ($!) = ($!, close(S), close(NS));
+ return undef;
+ }
+ select((select(S), $| = 1)[0]);
+ }
+
+ # now see whether we need to create a new sub:
+
+ unless ($subname = $expect_subname{$caller,@_}) {
+ # nope. make a new one:
+ $expect_subname{$caller,@_} = $subname = $nextsubname++;
+
+ $cases .= <<"EDQ"; # header is funny to make everything elsif's
+sub $subname {
+ LOOP: {
+ if (0) { ; }
+EDQ
+ while (@_) {
+ ($pattern,$action) = splice(@_,0,2);
+ if ($pattern =~ /^eof$/i) {
+ $cases .= <<"EDQ";
+ elsif (\$eof) {
+ package $caller;
+ $action;
+ }
+EDQ
+ $eof = 0;
+ } elsif ($pattern =~ /^timeout$/i) {
+ $cases .= <<"EDQ";
+ elsif (\$timeout) {
+ package $caller;
+ $action;
+ }
+EDQ
+ $timeout = 0;
+ } else {
+ $pattern =~ s#/#\\/#g;
+ $cases .= <<"EDQ";
+ elsif (\$S =~ /$pattern/) {
+ \$S = \$';
+ package $caller;
+ $action;
+ }
+EDQ
+ }
+ }
+ $cases .= <<"EDQ" if $eof;
+ elsif (\$eof) {
+ undef;
+ }
+EDQ
+ $cases .= <<"EDQ" if $timeout;
+ elsif (\$timeout) {
+ undef;
+ }
+EDQ
+ $cases .= <<'ESQ';
+ else {
+ $rmask = "";
+ vec($rmask,fileno(S),1) = 1;
+ ($nfound, $rmask) =
+ select($rmask, undef, undef, $endtime - time);
+ if ($nfound) {
+ $nread = sysread(S, $thisbuf, 1024);
+ if ($nread > 0) {
+ $S .= $thisbuf;
+ } else {
+ $eof++, redo LOOP; # any error is also eof
+ }
+ } else {
+ $timeout++, redo LOOP; # timeout
+ }
+ redo LOOP;
+ }
+ }
+}
+ESQ
+ eval $cases; die "$cases:\n$@" if $@;
+ }
+ $eof = $timeout = 0;
+ do $subname();
+}
+
+## &chat'print([$handle,] @data)
+## $handle is from previous &chat'open().
+## like print $handle @data
+
+sub print { ## public
+ if ($_[0] =~ /$nextpat/) {
+ *S = shift;
+ }
+ print S @_;
+}
+
+## &chat'close([$handle,])
+## $handle is from previous &chat'open().
+## like close $handle
+
+sub close { ## public
+ if ($_[0] =~ /$nextpat/) {
+ *S = shift;
+ }
+ close(S);
+ if (defined $S{"needs_close"}) { # is it a listen socket?
+ local(*NS) = $S{"needs_close"};
+ delete $S{"needs_close"};
+ close(NS);
+ }
+}
+
+## @ready_handles = &chat'select($timeout, @handles)
+## select()'s the handles with a timeout value of $timeout seconds.
+## Returns an array of handles that are ready for I/O.
+## Both user handles and chat handles are supported (but beware of
+## stdio's buffering for user handles).
+
+sub select { ## public
+ local($timeout) = shift;
+ local(@handles) = @_;
+ local(%handlename) = ();
+ local(%ready) = ();
+ local($caller) = caller;
+ local($rmask) = "";
+ for (@handles) {
+ if (/$nextpat/o) { # one of ours... see if ready
+ local(*SYM) = $_;
+ if (length($SYM)) {
+ $timeout = 0; # we have a winner
+ $ready{$_}++;
+ }
+ $handlename{fileno($_)} = $_;
+ } else {
+ $handlename{fileno(/'/ ? $_ : "$caller\'$_")} = $_;
+ }
+ }
+ for (sort keys %handlename) {
+ vec($rmask, $_, 1) = 1;
+ }
+ select($rmask, undef, undef, $timeout);
+ for (sort keys %handlename) {
+ $ready{$handlename{$_}}++ if vec($rmask,$_,1);
+ }
+ sort keys %ready;
+}
+
+# ($pty,$tty) = $chat'_getpty(PTY,TTY):
+# internal procedure to get the next available pty.
+# opens pty on handle PTY, and matching tty on handle TTY.
+# returns undef if can't find a pty.
+
+sub _getpty { ## private
+ local($_PTY,$_TTY) = @_;
+ $_PTY =~ s/^([^']+)$/(caller)[$[]."'".$1/e;
+ $_TTY =~ s/^([^']+)$/(caller)[$[]."'".$1/e;
+ local($pty,$tty);
+ for $bank (112..127) {
+ next unless -e sprintf("/dev/pty%c0", $bank);
+ for $unit (48..57) {
+ $pty = sprintf("/dev/pty%c%c", $bank, $unit);
+ open($_PTY,"+>$pty") || next;
+ select((select($_PTY), $| = 1)[0]);
+ ($tty = $pty) =~ s/pty/tty/;
+ open($_TTY,"+>$tty") || next;
+ select((select($_TTY), $| = 1)[0]);
+ system "stty nl>$tty";
+ return ($pty,$tty);
+ }
+ }
+ undef;
+}
+
+1;
projects / p5sagit/p5-mst-13.2.git / commitdiff