1239 lines
37 KiB
Perl
1239 lines
37 KiB
Perl
#!/usr/bin/perl -w
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#
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# Regenerate (overwriting only if changed):
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#
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# reentr.h
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# reentr.c
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#
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# from information stored in the DATA section of this file.
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#
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# With the -U option, it also unconditionally regenerates the relevant
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# metaconfig units:
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#
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# d_${func}_r.U
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#
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# Also accepts the standard regen_lib -q and -v args.
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#
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# This script is normally invoked from regen.pl.
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BEGIN {
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# Get function prototypes
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require './regen/regen_lib.pl';
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}
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use strict;
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use Getopt::Std;
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my %opts;
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getopts('Uv', \%opts);
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my %map = (
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V => "void",
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A => "char*", # as an input argument
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B => "char*", # as an output argument
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C => "const char*", # as a read-only input argument
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I => "int",
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L => "long",
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W => "size_t",
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H => "FILE**",
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E => "int*",
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);
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# (See the definitions after __DATA__.)
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# In func|inc|type|... a "S" means "type*", and a "R" means "type**".
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# (The "types" are often structs, such as "struct passwd".)
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#
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# After the prototypes one can have |X=...|Y=... to define more types.
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# A commonly used extra type is to define D to be equal to "type_data",
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# for example "struct_hostent_data to" go with "struct hostent".
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#
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# Example #1: I_XSBWR means int func_r(X, type, char*, size_t, type**)
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# Example #2: S_SBIE means type func_r(type, char*, int, int*)
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# Example #3: S_CBI means type func_r(const char*, char*, int)
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sub open_print_header {
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my ($file, $quote) = @_;
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return open_new($file, '>',
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{ by => 'regen/reentr.pl',
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from => 'data in regen/reentr.pl',
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file => $file, style => '*',
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copyright => [2002, 2003, 2005 .. 2007],
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quote => $quote });
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}
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my $h = open_print_header('reentr.h');
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print $h <<EOF;
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#ifndef PERL_REENTR_H_
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#define PERL_REENTR_H_
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/* If compiling for a threaded perl, we will macro-wrap the system/library
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* interfaces (e.g. getpwent()) which have threaded versions
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* (e.g. getpwent_r()), which will handle things correctly for
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* the Perl interpreter. This is done automatically for the perl core and
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* extensions, but not generally for XS modules unless they
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* #define PERL_REENTRANT
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* See L<perlxs/Thread-aware system interfaces>.
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*
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* For a function 'foo', use the compile-time directive
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* #ifdef PERL_REENTR_USING_FOO_R
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* to test if the function actually did get replaced by the reentrant version.
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* (If it isn't getting replaced, it might mean it uses a different prototype
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* on the given platform than any we are expecting. To fix that, add the
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* prototype to the __DATA__ section of regen/reentr.pl.)
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*/
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#ifndef PERL_REENTR_API
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# if defined(PERL_CORE) || defined(PERL_EXT) || defined(PERL_REENTRANT)
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# define PERL_REENTR_API 1
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# else
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# define PERL_REENTR_API 0
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# endif
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#endif
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#ifdef USE_REENTRANT_API
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/* For thread-safe builds, alternative methods are used to make calls to this
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* safe. */
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#ifdef USE_THREAD_SAFE_LOCALE
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# undef HAS_SETLOCALE_R
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#endif
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/* Deprecations: some platforms have the said reentrant interfaces
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* but they are declared obsolete and are not to be used. Often this
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* means that the platform has threadsafed the interfaces (hopefully).
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* All this is OS version dependent, so we are of course fooling ourselves.
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* If you know of more deprecations on some platforms, please add your own
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* (by editing reentr.pl, mind!) */
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# ifdef __hpux
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# undef HAS_CRYPT_R
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# undef HAS_ENDGRENT_R
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# undef HAS_ENDPWENT_R
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# undef HAS_GETGRENT_R
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# undef HAS_GETPWENT_R
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# undef HAS_SETLOCALE_R
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# undef HAS_STRERROR_R
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# define NETDB_R_OBSOLETE
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# endif
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# if defined(__osf__) && defined(__alpha) /* Tru64 aka Digital UNIX */
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# undef HAS_CRYPT_R
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# undef HAS_STRERROR_R
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# define NETDB_R_OBSOLETE
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# endif
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# if defined(__GLIBC__) && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 24))
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# undef HAS_READDIR_R
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# undef HAS_READDIR64_R
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# endif
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/*
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* As of OpenBSD 3.7, reentrant functions are now working, they just are
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* incompatible with everyone else. To make OpenBSD happy, we have to
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* memzero out certain structures before calling the functions.
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*/
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# if defined(__OpenBSD__) || defined(__SecBSD__)
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# define REENTR_MEMZERO(a,b) memzero(a,b)
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# else
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# define REENTR_MEMZERO(a,b) 0
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# endif
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# ifdef NETDB_R_OBSOLETE
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# undef HAS_ENDHOSTENT_R
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# undef HAS_ENDNETENT_R
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# undef HAS_ENDPROTOENT_R
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# undef HAS_ENDSERVENT_R
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# undef HAS_GETHOSTBYADDR_R
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# undef HAS_GETHOSTBYNAME_R
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# undef HAS_GETHOSTENT_R
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# undef HAS_GETNETBYADDR_R
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# undef HAS_GETNETBYNAME_R
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# undef HAS_GETNETENT_R
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# undef HAS_GETPROTOBYNAME_R
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# undef HAS_GETPROTOBYNUMBER_R
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# undef HAS_GETPROTOENT_R
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# undef HAS_GETSERVBYNAME_R
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# undef HAS_GETSERVBYPORT_R
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# undef HAS_GETSERVENT_R
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# undef HAS_SETHOSTENT_R
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# undef HAS_SETNETENT_R
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# undef HAS_SETPROTOENT_R
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# undef HAS_SETSERVENT_R
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# endif
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# ifdef I_PWD
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# include <pwd.h>
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# endif
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# ifdef I_GRP
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# include <grp.h>
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# endif
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# ifdef I_NETDB
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# include <netdb.h>
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# endif
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# ifdef I_CRYPT
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# ifdef I_CRYPT
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# include <crypt.h>
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# endif
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# endif
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# ifdef HAS_GETSPNAM_R
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# ifdef I_SHADOW
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# include <shadow.h>
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# endif
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# endif
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EOF
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my %seenh; # the different prototypes signatures for this function
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my %seena; # the different prototypes signatures for this function in order
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my @seenf; # all the seen functions
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my %seenp; # the different prototype signatures for all functions
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my %seent; # the return type of this function
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my %seens; # the type of this function's "S"
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my %seend; # the type of this function's "D"
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my %seenm; # all the types
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my %seenu; # the length of the argument list of this function
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while (<DATA>) { # Read in the prototypes.
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next if /^\s+$/;
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chomp;
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my ($func, $hdr, $type, @p) = split(/\s*\|\s*/, $_, -1);
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my $u;
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# Split off the real function name and the argument list.
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($func, $u) = split(' ', $func);
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$seenu{$func} = defined $u ? length $u : 0;
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my $FUNC = uc $func; # for output.
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push @seenf, $func;
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my %m = %map;
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if ($type) {
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$m{S} = "$type*";
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$m{R} = "$type**";
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}
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# Set any special mapping variables (like X=x_t)
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if (@p) {
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while ($p[-1] =~ /=/) {
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my ($k, $v) = ($p[-1] =~ /^([A-Za-z])\s*=\s*(.*)/);
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$m{$k} = $v;
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pop @p;
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}
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}
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# If given the -U option open up the metaconfig unit for this function.
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if ($opts{U} && open(U, ">", "d_${func}_r.U")) {
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binmode U;
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}
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if ($opts{U}) {
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# The metaconfig units needs prerequisite dependencies.
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my $prereqs = '';
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my $prereqh = '';
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my $prereqsh = '';
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if ($hdr ne 'stdio') { # There's no i_stdio.
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$prereqs = "i_$hdr";
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$prereqh = "$hdr.h";
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$prereqsh = "\$$prereqs $prereqh";
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}
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my @prereq = qw(Inlibc Protochk Hasproto i_systypes usethreads);
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push @prereq, $prereqs;
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my $hdrs = "\$i_systypes sys/types.h define stdio.h $prereqsh";
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if ($hdr eq 'time') {
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$hdrs .= " \$i_systime sys/time.h";
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push @prereq, 'i_systime';
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}
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# Output the metaconfig unit header.
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print U <<"EOF";
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?RCS: \$Id: d_${func}_r.U,v $
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?RCS:
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?RCS: Copyright (c) 2002,2003 Jarkko Hietaniemi
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?RCS:
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?RCS: You may distribute under the terms of either the GNU General Public
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?RCS: License or the Artistic License, as specified in the README file.
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?RCS:
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?RCS: Generated by the reentr.pl from the Perl 5.8 distribution.
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?RCS:
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?MAKE:d_${func}_r ${func}_r_proto: @prereq
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?MAKE: -pick add \$@ %<
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?S:d_${func}_r:
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?S: This variable conditionally defines the HAS_${FUNC}_R symbol,
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?S: which indicates to the C program that the ${func}_r()
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?S: routine is available.
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?S:.
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?S:${func}_r_proto:
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?S: This variable encodes the prototype of ${func}_r.
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?S: It is zero if d_${func}_r is undef, and one of the
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?S: REENTRANT_PROTO_T_ABC macros of reentr.h if d_${func}_r
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?S: is defined.
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?S:.
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?C:HAS_${FUNC}_R:
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?C: This symbol, if defined, indicates that the ${func}_r routine
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?C: is available to ${func} re-entrantly.
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?C:.
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?C:${FUNC}_R_PROTO:
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?C: This symbol encodes the prototype of ${func}_r.
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?C: It is zero if d_${func}_r is undef, and one of the
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?C: REENTRANT_PROTO_T_ABC macros of reentr.h if d_${func}_r
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?C: is defined.
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?C:.
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?H:#\$d_${func}_r HAS_${FUNC}_R /**/
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?H:#define ${FUNC}_R_PROTO \$${func}_r_proto /**/
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?H:.
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?T:try hdrs d_${func}_r_proto
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?LINT:set d_${func}_r
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?LINT:set ${func}_r_proto
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: see if ${func}_r exists
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set ${func}_r d_${func}_r
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eval \$inlibc
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case "\$d_${func}_r" in
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"\$define")
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EOF
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print U <<"EOF";
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hdrs="$hdrs"
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case "\$d_${func}_r_proto:\$usethreads" in
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":define") d_${func}_r_proto=define
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set d_${func}_r_proto ${func}_r \$hdrs
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eval \$hasproto ;;
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*) ;;
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esac
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case "\$d_${func}_r_proto" in
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define)
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EOF
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}
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for my $p (@p) {
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my ($r, $a) = ($p =~ /^(.)_(.+)/);
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my $v = join(", ", map { $m{$_} } split '', $a);
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if ($opts{U}) {
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print U <<"EOF";
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case "\$${func}_r_proto" in
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''|0) try='$m{$r} ${func}_r($v);'
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./protochk "extern \$try" \$hdrs && ${func}_r_proto=$p ;;
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esac
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EOF
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}
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$seenh{$func}->{$p}++;
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push @{$seena{$func}}, $p;
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$seenp{$p}++;
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$seent{$func} = $type;
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$seens{$func} = $m{S};
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$seend{$func} = $m{D};
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$seenm{$func} = \%m;
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}
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if ($opts{U}) {
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print U <<"EOF";
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case "\$${func}_r_proto" in
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''|0) d_${func}_r=undef
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${func}_r_proto=0
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echo "Disabling ${func}_r, cannot determine prototype." >&4 ;;
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* ) case "\$${func}_r_proto" in
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REENTRANT_PROTO*) ;;
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*) ${func}_r_proto="REENTRANT_PROTO_\$${func}_r_proto" ;;
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esac
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echo "Prototype: \$try" ;;
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esac
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;;
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*) case "\$usethreads" in
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define) echo "${func}_r has no prototype, not using it." >&4 ;;
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esac
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d_${func}_r=undef
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${func}_r_proto=0
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;;
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esac
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;;
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*) ${func}_r_proto=0
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;;
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esac
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EOF
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close(U);
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}
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}
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close DATA;
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{
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# Write out all the known prototype signatures.
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my $i = 1;
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for my $p (sort keys %seenp) {
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print $h "# define REENTRANT_PROTO_${p} ${i}\n";
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$i++;
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}
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}
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my @struct; # REENTR struct members
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my @size; # struct member buffer size initialization code
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my @init; # struct member buffer initialization (malloc) code
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my @free; # struct member buffer release (free) code
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my @wrap; # the wrapper (foo(a) -> foo_r(a,...)) cpp code
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my @define; # defines for optional features
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sub ifprotomatch {
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my $FUNC = shift;
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join " || ", map { "${FUNC}_R_PROTO == REENTRANT_PROTO_$_" } @_;
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}
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sub pushssif {
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push @struct, @_;
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push @size, @_;
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push @init, @_;
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push @free, @_;
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}
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sub pushinitfree {
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my $func = shift;
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push @init, <<EOF;
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Newx(PL_reentrant_buffer->_${func}_buffer, PL_reentrant_buffer->_${func}_size, char);
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EOF
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push @free, <<EOF;
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Safefree(PL_reentrant_buffer->_${func}_buffer);
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EOF
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}
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sub define {
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my ($n, $p, @F) = @_;
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my @H;
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my $H = uc $F[0];
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push @define, <<EOF;
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/* The @F using \L$n? */
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EOF
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my $GENFUNC;
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for my $func (@F) {
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my $FUNC = uc $func;
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my $HAS = "${FUNC}_R_HAS_$n";
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push @H, $HAS;
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my @h = grep { /$p/ } @{$seena{$func}};
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unless (defined $GENFUNC) {
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$GENFUNC = $FUNC;
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$GENFUNC =~ s/^GET//;
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}
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if (@h) {
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push @define, "# if defined(HAS_${FUNC}_R) && (" . join(" || ", map { "${FUNC}_R_PROTO == REENTRANT_PROTO_$_" } @h) . ")\n";
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push @define, <<EOF;
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# define $HAS
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# else
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# undef $HAS
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# endif
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EOF
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}
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}
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return if @F == 1;
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push @define, <<EOF;
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/* Any of the @F using \L$n? */
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EOF
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push @define, "# if (" . join(" || ", map { "defined($_)" } @H) . ")\n";
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push @define, <<EOF;
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# define USE_${GENFUNC}_$n
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# else
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# undef USE_${GENFUNC}_$n
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# endif
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EOF
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}
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define('BUFFER', 'B',
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qw(getgrent getgrgid getgrnam));
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define('PTR', 'R',
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qw(getgrent getgrgid getgrnam));
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define('PTR', 'R',
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qw(getpwent getpwnam getpwuid));
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define('PTR', 'R',
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qw(getspent getspnam));
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define('FPTR', 'H',
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qw(getgrent getgrgid getgrnam setgrent endgrent));
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define('FPTR', 'H',
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qw(getpwent getpwnam getpwuid setpwent endpwent));
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define('BUFFER', 'B',
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qw(getpwent getpwgid getpwnam));
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define('BUFFER', 'B',
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qw(getspent getspnam));
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define('PTR', 'R',
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qw(gethostent gethostbyaddr gethostbyname));
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define('PTR', 'R',
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qw(getnetent getnetbyaddr getnetbyname));
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define('PTR', 'R',
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qw(getprotoent getprotobyname getprotobynumber));
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define('PTR', 'R',
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qw(getservent getservbyname getservbyport));
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define('BUFFER', 'B',
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qw(gethostent gethostbyaddr gethostbyname));
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define('BUFFER', 'B',
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qw(getnetent getnetbyaddr getnetbyname));
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define('BUFFER', 'B',
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qw(getprotoent getprotobyname getprotobynumber));
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define('BUFFER', 'B',
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qw(getservent getservbyname getservbyport));
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define('ERRNO', 'E',
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qw(gethostent gethostbyaddr gethostbyname));
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define('ERRNO', 'E',
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qw(getnetent getnetbyaddr getnetbyname));
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|
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# The following loop accumulates the "ssif" (struct, size, init, free)
|
|
# sections that declare the struct members (in reentr.h), and the buffer
|
|
# size initialization, buffer initialization (malloc), and buffer
|
|
# release (free) code (in reentr.c).
|
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#
|
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# The loop also contains a lot of intrinsic logic about groups of
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# functions (since functions of certain kind operate the same way).
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|
|
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for my $func (@seenf) {
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my $FUNC = uc $func;
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|
my $ifdef = "# ifdef HAS_${FUNC}_R\n";
|
|
my $endif = "# endif /* HAS_${FUNC}_R */\n\n";
|
|
if (exists $seena{$func}) {
|
|
my @p = @{$seena{$func}};
|
|
if ($func =~ /^(asctime|ctime|getlogin|setlocale|strerror|ttyname)$/) {
|
|
pushssif $ifdef;
|
|
push @struct, <<EOF;
|
|
char* _${func}_buffer;
|
|
size_t _${func}_size;
|
|
EOF
|
|
my $size = ($func =~ /^(asctime|ctime)$/)
|
|
? 26
|
|
: "REENTRANTSMALLSIZE";
|
|
push @size, <<EOF;
|
|
PL_reentrant_buffer->_${func}_size = $size;
|
|
EOF
|
|
pushinitfree $func;
|
|
pushssif $endif;
|
|
}
|
|
elsif ($func =~ /^(gm|local)time$/) {
|
|
pushssif $ifdef;
|
|
push @struct, <<EOF; # Fixed size
|
|
$seent{$func} _${func}_struct;
|
|
EOF
|
|
pushssif $endif;
|
|
}
|
|
elsif ($func =~ /^(crypt)$/) {
|
|
pushssif $ifdef;
|
|
push @struct, <<EOF;
|
|
# if CRYPT_R_PROTO == REENTRANT_PROTO_B_CCD
|
|
$seend{$func} _${func}_data;
|
|
# else
|
|
$seent{$func} *_${func}_struct_buffer;
|
|
# endif
|
|
EOF
|
|
push @init, <<EOF;
|
|
# if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
|
|
PL_reentrant_buffer->_${func}_struct_buffer = 0;
|
|
# endif
|
|
EOF
|
|
push @free, <<EOF;
|
|
# if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
|
|
Safefree(PL_reentrant_buffer->_${func}_struct_buffer);
|
|
# endif
|
|
EOF
|
|
pushssif $endif;
|
|
}
|
|
elsif ($func =~ /^(getgrnam|getpwnam|getspnam)$/) {
|
|
pushssif $ifdef;
|
|
# 'genfunc' can be read either as 'generic' or 'genre',
|
|
# it represents a group of functions.
|
|
my $genfunc = $func;
|
|
$genfunc =~ s/nam/ent/g;
|
|
$genfunc =~ s/^get//;
|
|
my $GENFUNC = uc $genfunc;
|
|
push @struct, <<EOF;
|
|
$seent{$func} _${genfunc}_struct;
|
|
char* _${genfunc}_buffer;
|
|
size_t _${genfunc}_size;
|
|
EOF
|
|
push @struct, <<EOF;
|
|
# ifdef USE_${GENFUNC}_PTR
|
|
$seent{$func}* _${genfunc}_ptr;
|
|
# endif
|
|
EOF
|
|
push @struct, <<EOF;
|
|
# ifdef USE_${GENFUNC}_FPTR
|
|
FILE* _${genfunc}_fptr;
|
|
# endif
|
|
EOF
|
|
push @init, <<EOF;
|
|
# ifdef USE_${GENFUNC}_FPTR
|
|
PL_reentrant_buffer->_${genfunc}_fptr = NULL;
|
|
# endif
|
|
EOF
|
|
my $sc = $genfunc eq 'grent' ?
|
|
'_SC_GETGR_R_SIZE_MAX' : '_SC_GETPW_R_SIZE_MAX';
|
|
my $sz = "_${genfunc}_size";
|
|
push @size, <<EOF;
|
|
# if defined(HAS_SYSCONF) && defined($sc) && !defined(__GLIBC__)
|
|
PL_reentrant_buffer->$sz = sysconf($sc);
|
|
if (PL_reentrant_buffer->$sz == (size_t) -1)
|
|
PL_reentrant_buffer->$sz = REENTRANTUSUALSIZE;
|
|
# elif defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
|
|
PL_reentrant_buffer->$sz = SIABUFSIZ;
|
|
# elif defined(__sgi)
|
|
PL_reentrant_buffer->$sz = BUFSIZ;
|
|
# else
|
|
PL_reentrant_buffer->$sz = REENTRANTUSUALSIZE;
|
|
# endif
|
|
EOF
|
|
pushinitfree $genfunc;
|
|
pushssif $endif;
|
|
}
|
|
elsif ($func =~ /^(gethostbyname|getnetbyname|getservbyname|getprotobyname)$/) {
|
|
pushssif $ifdef;
|
|
my $genfunc = $func;
|
|
$genfunc =~ s/byname/ent/;
|
|
$genfunc =~ s/^get//;
|
|
my $GENFUNC = uc $genfunc;
|
|
my $D = ifprotomatch($FUNC, grep {/D/} @p);
|
|
my $d = $seend{$func};
|
|
$d =~ s/\*$//; # snip: we need the base type.
|
|
push @struct, <<EOF;
|
|
$seent{$func} _${genfunc}_struct;
|
|
# if $D
|
|
$d _${genfunc}_data;
|
|
# else
|
|
char* _${genfunc}_buffer;
|
|
size_t _${genfunc}_size;
|
|
# endif
|
|
# ifdef USE_${GENFUNC}_PTR
|
|
$seent{$func}* _${genfunc}_ptr;
|
|
# endif
|
|
EOF
|
|
push @struct, <<EOF;
|
|
# ifdef USE_${GENFUNC}_ERRNO
|
|
int _${genfunc}_errno;
|
|
# endif
|
|
EOF
|
|
push @size, <<EOF;
|
|
# if !($D)
|
|
PL_reentrant_buffer->_${genfunc}_size = REENTRANTUSUALSIZE;
|
|
# endif
|
|
EOF
|
|
push @init, <<EOF;
|
|
# if !($D)
|
|
Newx(PL_reentrant_buffer->_${genfunc}_buffer, PL_reentrant_buffer->_${genfunc}_size, char);
|
|
# endif
|
|
EOF
|
|
push @free, <<EOF;
|
|
# if !($D)
|
|
Safefree(PL_reentrant_buffer->_${genfunc}_buffer);
|
|
# endif
|
|
EOF
|
|
pushssif $endif;
|
|
}
|
|
elsif ($func =~ /^(readdir|readdir64)$/) {
|
|
pushssif $ifdef;
|
|
my $R = ifprotomatch($FUNC, grep {/R/} @p);
|
|
push @struct, <<EOF;
|
|
$seent{$func}* _${func}_struct;
|
|
size_t _${func}_size;
|
|
# if $R
|
|
$seent{$func}* _${func}_ptr;
|
|
# endif
|
|
EOF
|
|
push @size, <<EOF;
|
|
/* This is the size Solaris recommends.
|
|
* (though we go static, should use pathconf() instead) */
|
|
PL_reentrant_buffer->_${func}_size = sizeof($seent{$func}) + MAXPATHLEN + 1;
|
|
EOF
|
|
push @init, <<EOF;
|
|
PL_reentrant_buffer->_${func}_struct = ($seent{$func}*)safemalloc(PL_reentrant_buffer->_${func}_size);
|
|
EOF
|
|
push @free, <<EOF;
|
|
Safefree(PL_reentrant_buffer->_${func}_struct);
|
|
EOF
|
|
pushssif $endif;
|
|
}
|
|
|
|
push @wrap, $ifdef;
|
|
|
|
push @wrap, <<EOF;
|
|
# if defined(PERL_REENTR_API) && (PERL_REENTR_API+0 == 1)
|
|
# undef $func
|
|
EOF
|
|
|
|
# Write out what we have learned.
|
|
|
|
my @v = 'a'..'z';
|
|
my $v = join(", ", @v[0..$seenu{$func}-1]);
|
|
for my $p (@p) {
|
|
my ($r, $a) = split '_', $p;
|
|
my $test = $r eq 'I' ? ' == 0' : '';
|
|
my $true = 1;
|
|
my $genfunc = $func;
|
|
if ($genfunc =~ /^(?:get|set|end)(pw|gr|host|net|proto|serv|sp)/) {
|
|
$genfunc = "${1}ent";
|
|
}
|
|
my $b = $a;
|
|
my $w = '';
|
|
substr($b, 0, $seenu{$func}) = '';
|
|
if ($b =~ /R/) {
|
|
$true = "PL_reentrant_buffer->_${genfunc}_ptr";
|
|
} elsif ($b =~ /S/) {
|
|
if ($func =~ /^readdir/) {
|
|
$true = "PL_reentrant_buffer->_${genfunc}_struct";
|
|
} else {
|
|
$true = "&PL_reentrant_buffer->_${genfunc}_struct";
|
|
}
|
|
} elsif ($b =~ /B/) {
|
|
$true = "PL_reentrant_buffer->_${genfunc}_buffer";
|
|
}
|
|
if (length $b) {
|
|
$w = join ", ",
|
|
map { $_ eq 'R'
|
|
? "&PL_reentrant_buffer->_${genfunc}_ptr"
|
|
: $_ eq 'E'
|
|
? "&PL_reentrant_buffer->_${genfunc}_errno"
|
|
: $_ eq 'B'
|
|
? "PL_reentrant_buffer->_${genfunc}_buffer"
|
|
: $_ =~ /^[WI]$/
|
|
? "PL_reentrant_buffer->_${genfunc}_size"
|
|
: $_ eq 'H'
|
|
? "&PL_reentrant_buffer->_${genfunc}_fptr"
|
|
: $_ eq 'D'
|
|
? "&PL_reentrant_buffer->_${genfunc}_data"
|
|
: $_ eq 'S'
|
|
? ($func =~ /^readdir\d*$/
|
|
? "PL_reentrant_buffer->_${genfunc}_struct"
|
|
: $func =~ /^crypt$/
|
|
? "PL_reentrant_buffer->_${genfunc}_struct_buffer"
|
|
: "&PL_reentrant_buffer->_${genfunc}_struct")
|
|
: $_
|
|
} split '', $b;
|
|
$w = ", $w" if length $v;
|
|
}
|
|
|
|
# This needs a special case, see its definition in config.h
|
|
my $setup = ($func eq 'localtime') ? "L_R_TZSET " : "";
|
|
|
|
my $call = "$setup${func}_r($v$w)";
|
|
|
|
# Must make OpenBSD happy
|
|
my $memzero = '';
|
|
if($p =~ /D$/ &&
|
|
($genfunc eq 'protoent' || $genfunc eq 'servent')) {
|
|
$memzero = 'REENTR_MEMZERO(&PL_reentrant_buffer->_' . $genfunc . '_data, sizeof(PL_reentrant_buffer->_' . $genfunc . '_data)),';
|
|
}
|
|
push @wrap, <<EOF;
|
|
# if !defined($func) && ${FUNC}_R_PROTO == REENTRANT_PROTO_$p
|
|
EOF
|
|
if ($r eq 'V' || $r eq 'B') {
|
|
push @wrap, <<EOF;
|
|
# define $func($v) $call
|
|
EOF
|
|
} else {
|
|
if ($func =~ /^get/) {
|
|
my $rv = $v ? ", $v" : "";
|
|
if ($r eq 'I') {
|
|
push @wrap, <<EOF;
|
|
# define $func($v) ($memzero(PL_reentrant_retint = $call)$test ? $true : ((PL_reentrant_retint == ERANGE) ? ($seent{$func} *) Perl_reentrant_retry("$func"$rv) : 0))
|
|
EOF
|
|
} else {
|
|
push @wrap, <<EOF;
|
|
# define $func($v) ($call$test ? $true : ((errno == ERANGE) ? ($seent{$func} *) Perl_reentrant_retry("$func"$rv) : 0))
|
|
EOF
|
|
}
|
|
} else {
|
|
push @wrap, <<EOF;
|
|
# define $func($v) ($call$test ? $true : 0)
|
|
EOF
|
|
}
|
|
}
|
|
push @wrap, <<EOF; # !defined(xxx) && XXX_R_PROTO == REENTRANT_PROTO_Y_TS
|
|
# endif
|
|
EOF
|
|
}
|
|
push @wrap, <<EOF;
|
|
# if defined($func)
|
|
# define PERL_REENTR_USING_${FUNC}_R
|
|
# endif
|
|
EOF
|
|
|
|
push @wrap, <<EOF; # defined(PERL_REENTR_API) && (PERL_REENTR_API+0 == 1)
|
|
# endif
|
|
EOF
|
|
|
|
push @wrap, $endif, "\n";
|
|
}
|
|
}
|
|
|
|
local $" = '';
|
|
|
|
print $h <<EOF;
|
|
|
|
/* Defines for indicating which special features are supported. */
|
|
|
|
@define
|
|
typedef struct {
|
|
|
|
@struct
|
|
int dummy; /* cannot have empty structs */
|
|
} REENTR;
|
|
|
|
/* The wrappers. */
|
|
|
|
@wrap
|
|
|
|
/* Special case this; if others came along, could automate it */
|
|
# ifdef HAS_GETSPNAM_R
|
|
# define KEY_getspnam -1
|
|
# endif
|
|
|
|
#endif /* USE_REENTRANT_API */
|
|
|
|
#endif
|
|
EOF
|
|
|
|
read_only_bottom_close_and_rename($h);
|
|
|
|
# Prepare to write the reentr.c.
|
|
|
|
my $c = open_print_header('reentr.c', <<'EOQ');
|
|
*/
|
|
|
|
/*
|
|
* "Saruman," I said, standing away from him, "only one hand at a time can
|
|
* wield the One, and you know that well, so do not trouble to say we!"
|
|
*
|
|
* [p.260 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
|
|
*/
|
|
|
|
/*
|
|
* This file contains a collection of automatically created wrappers
|
|
* (created by running reentr.pl) for reentrant (thread-safe) versions of
|
|
* various library calls, such as getpwent_r. The wrapping is done so
|
|
* that other files like pp_sys.c calling those library functions need not
|
|
* care about the differences between various platforms' idiosyncrasies
|
|
* regarding these reentrant interfaces.
|
|
*/
|
|
EOQ
|
|
|
|
print $c <<"EOF";
|
|
#include "EXTERN.h"
|
|
#define PERL_IN_REENTR_C
|
|
#include "perl.h"
|
|
#include "reentr.h"
|
|
#include "keywords.h"
|
|
|
|
#define RenewDouble(data_pointer, size_pointer, type) \\
|
|
STMT_START { \\
|
|
const size_t size = MAX(*(size_pointer), 1) * 2; \\
|
|
Renew((data_pointer), (size), type); \\
|
|
*(size_pointer) = size; \\
|
|
} STMT_END
|
|
|
|
void
|
|
Perl_reentrant_size(pTHX) {
|
|
PERL_UNUSED_CONTEXT;
|
|
|
|
/* Set the sizes of the reentrant buffers */
|
|
|
|
#ifdef USE_REENTRANT_API
|
|
# define REENTRANTSMALLSIZE 256 /* Make something up. */
|
|
# define REENTRANTUSUALSIZE 4096 /* Make something up. */
|
|
|
|
@size
|
|
#endif /* USE_REENTRANT_API */
|
|
|
|
}
|
|
|
|
void
|
|
Perl_reentrant_init(pTHX) {
|
|
PERL_UNUSED_CONTEXT;
|
|
|
|
/* Initialize the whole thing */
|
|
|
|
#ifdef USE_REENTRANT_API
|
|
|
|
Newx(PL_reentrant_buffer, 1, REENTR);
|
|
Perl_reentrant_size(aTHX);
|
|
|
|
@init
|
|
#endif /* USE_REENTRANT_API */
|
|
|
|
}
|
|
|
|
void
|
|
Perl_reentrant_free(pTHX) {
|
|
PERL_UNUSED_CONTEXT;
|
|
|
|
/* Tear down */
|
|
|
|
#ifdef USE_REENTRANT_API
|
|
|
|
@free
|
|
Safefree(PL_reentrant_buffer);
|
|
|
|
#endif /* USE_REENTRANT_API */
|
|
}
|
|
|
|
void*
|
|
Perl_reentrant_retry(const char *f, ...)
|
|
{
|
|
/* This function is set up to be called if the normal function returns
|
|
* failure with errno ERANGE, which indicates the buffer is too small.
|
|
* This function calls the failing one again with a larger buffer.
|
|
*
|
|
* What has happened is that, due to the magic of C preprocessor macro
|
|
* expansion, when the original code called function 'foo(args)', it was
|
|
* instead compiled into something like a call of 'foo_r(args, buffer)'
|
|
* Below we retry with 'foo', but the preprocessor has changed that into
|
|
* 'foo_r', so this function will end up calling itself recursively, each
|
|
* time with a larger buffer. If PERL_REENTRANT_MAXSIZE is defined, it
|
|
* won't increase beyond that, instead failing. */
|
|
|
|
void *retptr = NULL;
|
|
va_list ap;
|
|
|
|
I32 key = 0;
|
|
|
|
#ifdef USE_REENTRANT_API
|
|
|
|
dTHX;
|
|
|
|
key = Perl_keyword (aTHX_ f, strlen(f), FALSE /* not feature enabled */);
|
|
|
|
/* Easier to special case this here than in embed.pl. (Look at what it
|
|
generates for proto.h) */
|
|
PERL_ARGS_ASSERT_REENTRANT_RETRY;
|
|
|
|
#endif
|
|
|
|
if (key == 0) {
|
|
|
|
#ifdef HAS_GETSPNAM_R
|
|
|
|
/* This is a #define as has no corresponding keyword */
|
|
if (strEQ(f, "getspnam")) {
|
|
key = KEY_getspnam;
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
else if (key < 0) {
|
|
key = -key;
|
|
}
|
|
|
|
va_start(ap, f);
|
|
|
|
#ifdef USE_REENTRANT_API
|
|
|
|
switch (key) {
|
|
|
|
# ifdef USE_HOSTENT_BUFFER
|
|
|
|
case KEY_gethostbyaddr:
|
|
case KEY_gethostbyname:
|
|
case KEY_endhostent:
|
|
{
|
|
char * host_addr;
|
|
Size_t asize;
|
|
char * host_name;
|
|
int anint;
|
|
|
|
# ifdef PERL_REENTRANT_MAXSIZE
|
|
if (PL_reentrant_buffer->_hostent_size <=
|
|
PERL_REENTRANT_MAXSIZE / 2)
|
|
# endif
|
|
RenewDouble(PL_reentrant_buffer->_hostent_buffer,
|
|
&PL_reentrant_buffer->_hostent_size, char);
|
|
switch (key) {
|
|
case KEY_gethostbyaddr:
|
|
host_addr = va_arg(ap, char *);
|
|
asize = va_arg(ap, Size_t);
|
|
anint = va_arg(ap, int);
|
|
/* socklen_t is what Posix 2001 says this should be */
|
|
retptr = gethostbyaddr(host_addr, (socklen_t) asize, anint); break;
|
|
case KEY_gethostbyname:
|
|
host_name = va_arg(ap, char *);
|
|
retptr = gethostbyname(host_name); break;
|
|
case KEY_endhostent:
|
|
retptr = gethostent(); break;
|
|
default:
|
|
SETERRNO(ERANGE, LIB_INVARG);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
# endif
|
|
# ifdef USE_GRENT_BUFFER
|
|
|
|
case KEY_getgrent:
|
|
case KEY_getgrgid:
|
|
case KEY_getgrnam:
|
|
{
|
|
char * name;
|
|
Gid_t gid;
|
|
|
|
# ifdef PERL_REENTRANT_MAXSIZE
|
|
if (PL_reentrant_buffer->_grent_size <=
|
|
PERL_REENTRANT_MAXSIZE / 2)
|
|
# endif
|
|
RenewDouble(PL_reentrant_buffer->_grent_buffer,
|
|
&PL_reentrant_buffer->_grent_size, char);
|
|
switch (key) {
|
|
case KEY_getgrnam:
|
|
name = va_arg(ap, char *);
|
|
retptr = getgrnam(name); break;
|
|
case KEY_getgrgid:
|
|
# if Gid_t_size < INTSIZE
|
|
gid = (Gid_t)va_arg(ap, int);
|
|
# else
|
|
gid = va_arg(ap, Gid_t);
|
|
# endif
|
|
retptr = getgrgid(gid); break;
|
|
case KEY_getgrent:
|
|
retptr = getgrent(); break;
|
|
default:
|
|
SETERRNO(ERANGE, LIB_INVARG);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
# endif
|
|
# ifdef USE_NETENT_BUFFER
|
|
|
|
case KEY_getnetbyaddr:
|
|
case KEY_getnetbyname:
|
|
case KEY_getnetent:
|
|
{
|
|
char * name;
|
|
Netdb_net_t net;
|
|
int anint;
|
|
|
|
# ifdef PERL_REENTRANT_MAXSIZE
|
|
if (PL_reentrant_buffer->_netent_size <=
|
|
PERL_REENTRANT_MAXSIZE / 2)
|
|
# endif
|
|
RenewDouble(PL_reentrant_buffer->_netent_buffer,
|
|
&PL_reentrant_buffer->_netent_size, char);
|
|
switch (key) {
|
|
case KEY_getnetbyaddr:
|
|
net = va_arg(ap, Netdb_net_t);
|
|
anint = va_arg(ap, int);
|
|
retptr = getnetbyaddr(net, anint); break;
|
|
case KEY_getnetbyname:
|
|
name = va_arg(ap, char *);
|
|
retptr = getnetbyname(name); break;
|
|
case KEY_getnetent:
|
|
retptr = getnetent(); break;
|
|
default:
|
|
SETERRNO(ERANGE, LIB_INVARG);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
# endif
|
|
# ifdef USE_PWENT_BUFFER
|
|
|
|
case KEY_getpwnam:
|
|
case KEY_getpwuid:
|
|
case KEY_getpwent:
|
|
{
|
|
Uid_t uid;
|
|
char * name;
|
|
|
|
# ifdef PERL_REENTRANT_MAXSIZE
|
|
if (PL_reentrant_buffer->_pwent_size <=
|
|
PERL_REENTRANT_MAXSIZE / 2)
|
|
|
|
# endif
|
|
RenewDouble(PL_reentrant_buffer->_pwent_buffer,
|
|
&PL_reentrant_buffer->_pwent_size, char);
|
|
switch (key) {
|
|
case KEY_getpwnam:
|
|
name = va_arg(ap, char *);
|
|
retptr = getpwnam(name); break;
|
|
case KEY_getpwuid:
|
|
|
|
# if Uid_t_size < INTSIZE
|
|
uid = (Uid_t)va_arg(ap, int);
|
|
# else
|
|
uid = va_arg(ap, Uid_t);
|
|
# endif
|
|
retptr = getpwuid(uid); break;
|
|
|
|
# if defined(HAS_GETPWENT) || defined(HAS_GETPWENT_R)
|
|
|
|
case KEY_getpwent:
|
|
retptr = getpwent(); break;
|
|
# endif
|
|
default:
|
|
SETERRNO(ERANGE, LIB_INVARG);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
# endif
|
|
# ifdef USE_SPENT_BUFFER
|
|
|
|
case KEY_getspnam:
|
|
{
|
|
char * name;
|
|
|
|
# ifdef PERL_REENTRANT_MAXSIZE
|
|
if (PL_reentrant_buffer->_spent_size <=
|
|
PERL_REENTRANT_MAXSIZE / 2)
|
|
|
|
# endif
|
|
RenewDouble(PL_reentrant_buffer->_spent_buffer,
|
|
&PL_reentrant_buffer->_spent_size, char);
|
|
switch (key) {
|
|
case KEY_getspnam:
|
|
name = va_arg(ap, char *);
|
|
retptr = getspnam(name); break;
|
|
default:
|
|
SETERRNO(ERANGE, LIB_INVARG);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
# endif
|
|
# ifdef USE_PROTOENT_BUFFER
|
|
|
|
case KEY_getprotobyname:
|
|
case KEY_getprotobynumber:
|
|
case KEY_getprotoent:
|
|
{
|
|
char * name;
|
|
int anint;
|
|
|
|
# ifdef PERL_REENTRANT_MAXSIZE
|
|
if (PL_reentrant_buffer->_protoent_size <=
|
|
PERL_REENTRANT_MAXSIZE / 2)
|
|
# endif
|
|
RenewDouble(PL_reentrant_buffer->_protoent_buffer,
|
|
&PL_reentrant_buffer->_protoent_size, char);
|
|
switch (key) {
|
|
case KEY_getprotobyname:
|
|
name = va_arg(ap, char *);
|
|
retptr = getprotobyname(name); break;
|
|
case KEY_getprotobynumber:
|
|
anint = va_arg(ap, int);
|
|
retptr = getprotobynumber(anint); break;
|
|
case KEY_getprotoent:
|
|
retptr = getprotoent(); break;
|
|
default:
|
|
SETERRNO(ERANGE, LIB_INVARG);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
# endif
|
|
# ifdef USE_SERVENT_BUFFER
|
|
|
|
case KEY_getservbyname:
|
|
case KEY_getservbyport:
|
|
case KEY_getservent:
|
|
{
|
|
char * name;
|
|
char * proto;
|
|
int anint;
|
|
|
|
# ifdef PERL_REENTRANT_MAXSIZE
|
|
if (PL_reentrant_buffer->_servent_size <=
|
|
PERL_REENTRANT_MAXSIZE / 2)
|
|
# endif
|
|
RenewDouble(PL_reentrant_buffer->_servent_buffer,
|
|
&PL_reentrant_buffer->_servent_size, char);
|
|
switch (key) {
|
|
case KEY_getservbyname:
|
|
name = va_arg(ap, char *);
|
|
proto = va_arg(ap, char *);
|
|
retptr = getservbyname(name, proto); break;
|
|
case KEY_getservbyport:
|
|
anint = va_arg(ap, int);
|
|
name = va_arg(ap, char *);
|
|
retptr = getservbyport(anint, name); break;
|
|
case KEY_getservent:
|
|
retptr = getservent(); break;
|
|
default:
|
|
SETERRNO(ERANGE, LIB_INVARG);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
# endif
|
|
|
|
default:
|
|
/* Not known how to retry, so just fail. */
|
|
break;
|
|
}
|
|
|
|
#else
|
|
|
|
PERL_UNUSED_ARG(f);
|
|
|
|
#endif
|
|
|
|
va_end(ap);
|
|
return retptr;
|
|
}
|
|
EOF
|
|
|
|
read_only_bottom_close_and_rename($c);
|
|
|
|
# As of March 2020, the config.h entries that have reentrant prototypes that
|
|
# aren't in this file are:
|
|
# drand48
|
|
# random
|
|
# srand48
|
|
# srandom
|
|
|
|
# The meanings of the flags are derivable from %map above
|
|
# Fnc, arg flags| hdr | ? struct type | prototypes...
|
|
__DATA__
|
|
asctime S |time |const struct tm|B_SB|B_SBI|I_SB|I_SBI
|
|
crypt CC |crypt |struct crypt_data|B_CCS|B_CCD|D=CRYPTD*
|
|
ctermid B |stdio | |B_B
|
|
ctime S |time |const time_t |B_SB|B_SBI|I_SB|I_SBI
|
|
endgrent |grp | |I_H|V_H
|
|
endhostent |netdb | |I_D|V_D|D=struct hostent_data*
|
|
endnetent |netdb | |I_D|V_D|D=struct netent_data*
|
|
endprotoent |netdb | |I_D|V_D|D=struct protoent_data*
|
|
endpwent |pwd | |I_H|V_H
|
|
endservent |netdb | |I_D|V_D|D=struct servent_data*
|
|
getgrent |grp |struct group |I_SBWR|I_SBIR|S_SBW|S_SBI|I_SBI|I_SBIH
|
|
getgrgid T |grp |struct group |I_TSBWR|I_TSBIR|I_TSBI|S_TSBI|T=gid_t
|
|
getgrnam C |grp |struct group |I_CSBWR|I_CSBIR|S_CBI|I_CSBI|S_CSBI
|
|
gethostbyaddr CWI |netdb |struct hostent |I_CWISBWRE|S_CWISBWIE|S_CWISBIE|S_TWISBIE|S_CIISBIE|S_CSBIE|S_TSBIE|I_CWISD|I_CIISD|I_CII|I_TsISBWRE|D=struct hostent_data*|T=const void*|s=socklen_t
|
|
gethostbyname C |netdb |struct hostent |I_CSBWRE|S_CSBIE|I_CSD|D=struct hostent_data*
|
|
gethostent |netdb |struct hostent |I_SBWRE|I_SBIE|S_SBIE|S_SBI|I_SBI|I_SD|D=struct hostent_data*
|
|
getlogin |unistd |char |I_BW|I_BI|B_BW|B_BI
|
|
getnetbyaddr LI |netdb |struct netent |I_UISBWRE|I_LISBI|S_TISBI|S_LISBI|I_TISD|I_LISD|I_IISD|I_uISBWRE|D=struct netent_data*|T=in_addr_t|U=unsigned long|u=uint32_t
|
|
getnetbyname C |netdb |struct netent |I_CSBWRE|I_CSBI|S_CSBI|I_CSD|D=struct netent_data*
|
|
getnetent |netdb |struct netent |I_SBWRE|I_SBIE|S_SBIE|S_SBI|I_SBI|I_SD|D=struct netent_data*
|
|
getprotobyname C|netdb |struct protoent|I_CSBWR|S_CSBI|I_CSD|D=struct protoent_data*
|
|
getprotobynumber I |netdb |struct protoent|I_ISBWR|S_ISBI|I_ISD|D=struct protoent_data*
|
|
getprotoent |netdb |struct protoent|I_SBWR|I_SBI|S_SBI|I_SD|D=struct protoent_data*
|
|
getpwent |pwd |struct passwd |I_SBWR|I_SBIR|S_SBW|S_SBI|I_SBI|I_SBIH
|
|
getpwnam C |pwd |struct passwd |I_CSBWR|I_CSBIR|S_CSBI|I_CSBI
|
|
getpwuid T |pwd |struct passwd |I_TSBWR|I_TSBIR|I_TSBI|S_TSBI|T=uid_t
|
|
getservbyname CC|netdb |struct servent |I_CCSBWR|S_CCSBI|I_CCSD|D=struct servent_data*
|
|
getservbyport IC|netdb |struct servent |I_ICSBWR|S_ICSBI|I_ICSD|D=struct servent_data*
|
|
getservent |netdb |struct servent |I_SBWR|I_SBI|S_SBI|I_SD|D=struct servent_data*
|
|
getspnam C |shadow |struct spwd |I_CSBWR|S_CSBI
|
|
gmtime T |time |struct tm |S_TS|T=time_t*
|
|
localtime T |time |struct tm |S_TS|T=time_t*
|
|
readdir T |dirent |struct dirent |I_TSR|I_TS|T=DIR*
|
|
readdir64 T |dirent |struct dirent64|I_TSR|I_TS|T=DIR*
|
|
setgrent |grp | |I_H|V_H
|
|
sethostent I |netdb | |I_ID|V_ID|D=struct hostent_data*
|
|
setlocale IC |locale | |I_ICBI
|
|
setnetent I |netdb | |I_ID|V_ID|D=struct netent_data*
|
|
setprotoent I |netdb | |I_ID|V_ID|D=struct protoent_data*
|
|
setpwent |pwd | |I_H|V_H
|
|
setservent I |netdb | |I_ID|V_ID|D=struct servent_data*
|
|
strerror I |string | |I_IBW|I_IBI|B_IBW
|
|
tmpnam B |stdio | |B_B
|
|
ttyname I |unistd | |I_IBW|I_IBI|B_IBI
|