X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=reentr.pl;h=b90c61dcfc4479523ba1bdab0c3472788e9d746d;hb=a9d055aee514470ac397b978d8cd44f6bd078dc6;hp=4f9619eb9ee3f386e438ac406c54c088e573bcbf;hpb=ab2b559bb5510413385bdf5e5398bcdfb293e40d;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/reentr.pl b/reentr.pl
index 4f9619e..b90c61d 100644
--- a/reentr.pl
+++ b/reentr.pl
@@ -1,14 +1,30 @@
 #!/usr/bin/perl -w
-
-#
-# Generate the reentr.c and reentr.h,
-# and optionally also the relevant metaconfig units (-U option).
 # 
+# Regenerate (overwriting only if changed):
+#
+#    reentr.h
+#    reentr.c
+#
+# from information stored in the DATA section of this file.
+#
+# With the -U option, it also unconditionally regenerates the relevant
+# metaconfig units:
+#
+#    d_${func}_r.U
+#
+# Also accepts the standard regen_lib -q and -v args.
+#
+# This script is normally invoked from regen.pl.
+
+BEGIN {
+    # Get function prototypes
+    require 'regen_lib.pl';
+}
 
 use strict;
 use Getopt::Std;
 my %opts;
-getopts('U', \%opts);
+getopts('Uv', \%opts);
 
 my %map = (
 	   V => "void",
@@ -35,23 +51,40 @@ my %map = (
 # Example #3: S_CBI   means type func_r(const char*, char*, int)
 
 
-die "reentr.h: $!" unless open(H, ">reentr.h");
-select H;
+# safer_unlink 'reentr.h';
+my $h = safer_open("reentr.h-new");
+select $h;
 print <<EOF;
-/*
+/* -*- buffer-read-only: t -*-
+ *
  *    reentr.h
  *
- *    Copyright (c) 1997-2003, Larry Wall
+ *    Copyright (C) 2002, 2003, 2005, 2006, 2007 by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
  *
  *  !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
- *  This file is built by reentrl.pl from data in reentr.pl.
+ *  This file is built by reentr.pl from data in reentr.pl.
  */
 
 #ifndef REENTR_H
-#define REENTR_H 
+#define REENTR_H
+
+/* If compiling for a threaded perl, we will macro-wrap the system/library
+ * interfaces (e.g. getpwent()) which have threaded versions
+ * (e.g. getpwent_r()), which will handle things correctly for
+ * the Perl interpreter, but otherwise (for XS) the wrapping does
+ * not take place.  See L<perlxs/Thread-aware system interfaces>.
+ */
+
+#ifndef PERL_REENTR_API
+# if defined(PERL_CORE) || defined(PERL_EXT)
+#  define PERL_REENTR_API 1
+# else
+#  define PERL_REENTR_API 0
+# endif
+#endif
 
 #ifdef USE_REENTRANT_API
  
@@ -59,7 +92,8 @@ print <<EOF;
  * but they are declared obsolete and are not to be used.  Often this
  * means that the platform has threadsafed the interfaces (hopefully).
  * All this is OS version dependent, so we are of course fooling ourselves.
- * If you know of more deprecations on some platforms, please add your own. */
+ * If you know of more deprecations on some platforms, please add your own
+ * (by editing reentr.pl, mind!) */
 
 #ifdef __hpux
 #   undef HAS_CRYPT_R
@@ -80,6 +114,17 @@ print <<EOF;
 #   define NETDB_R_OBSOLETE
 #endif
 
+/*
+ * As of OpenBSD 3.7, reentrant functions are now working, they just are
+ * incompatible with everyone else.  To make OpenBSD happy, we have to
+ * memzero out certain structures before calling the functions.
+ */
+#if defined(__OpenBSD__)
+#    define REENTR_MEMZERO(a,b) memzero(a,b)
+#else
+#    define REENTR_MEMZERO(a,b) 0
+#endif 
+
 #ifdef NETDB_R_OBSOLETE
 #   undef HAS_ENDHOSTENT_R
 #   undef HAS_ENDNETENT_R
@@ -165,6 +210,7 @@ while (<DATA>) { # Read in the protypes.
 
     # If given the -U option open up the metaconfig unit for this function.
     if ($opts{U} && open(U, ">d_${func}_r.U"))  {
+    	binmode U;
 	select U;
     }
 
@@ -296,7 +342,7 @@ close DATA;
 
 # Prepare to continue writing the reentr.h.
 
-select H;
+select $h;
 
 {
     # Write out all the known prototype signatures.
@@ -329,7 +375,7 @@ sub pushssif {
 sub pushinitfree {
     my $func = shift;
     push @init, <<EOF;
-	New(31338, PL_reentrant_buffer->_${func}_buffer, PL_reentrant_buffer->_${func}_size, char);
+	Newx(PL_reentrant_buffer->_${func}_buffer, PL_reentrant_buffer->_${func}_size, char);
 EOF
     push @free, <<EOF;
 	Safefree(PL_reentrant_buffer->_${func}_buffer);
@@ -365,6 +411,7 @@ EOF
 EOF
         }
     }
+    return if @F == 1;
     push @define, <<EOF;
 
 /* Any of the @F using \L$n? */
@@ -453,19 +500,22 @@ EOF
 #if CRYPT_R_PROTO == REENTRANT_PROTO_B_CCD
 	$seend{$func} _${func}_data;
 #else
-	$seent{$func} _${func}_struct;
+	$seent{$func} *_${func}_struct_buffer;
 #endif
 EOF
     	    push @init, <<EOF;
-#ifdef __GLIBC__
-	PL_reentrant_buffer->_${func}_struct.initialized = 0;
-	/* work around glibc-2.2.5 bug */
-	PL_reentrant_buffer->_${func}_struct.current_saltbits = 0;
+#if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
+	PL_reentrant_buffer->_${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 =~ /^(drand48|gmtime|localtime|random)$/) {
+        elsif ($func =~ /^(drand48|random|srandom)$/) {
 	    pushssif $ifdef;
 	    push @struct, <<EOF;
 	$seent{$func} _${func}_struct;
@@ -476,13 +526,13 @@ EOF
 EOF
 	    } elsif ($1 eq 'random') {
 	    push @struct, <<EOF;
-#   if RANDOM_R_PROTO == REENTRANT_PROTO_iS
+#   if RANDOM_R_PROTO == REENTRANT_PROTO_I_iS
 	int	_${func}_retval;
 #   endif
-#   if RANDOM_R_PROTO == REENTRANT_PROTO_lS
+#   if RANDOM_R_PROTO == REENTRANT_PROTO_I_lS
 	long	_${func}_retval;
 #   endif
-#   if RANDOM_R_PROTO == REENTRANT_PROTO_tS
+#   if RANDOM_R_PROTO == REENTRANT_PROTO_I_St
 	int32_t	_${func}_retval;
 #   endif
 EOF
@@ -523,7 +573,7 @@ EOF
 	    push @size, <<EOF;
 #   if defined(HAS_SYSCONF) && defined($sc) && !defined(__GLIBC__)
 	PL_reentrant_buffer->$sz = sysconf($sc);
-	if (PL_reentrant_buffer->$sz == -1)
+	if (PL_reentrant_buffer->$sz == (size_t) -1)
 		PL_reentrant_buffer->$sz = REENTRANTUSUALSIZE;
 #   else
 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
@@ -573,7 +623,7 @@ EOF
 EOF
 	    push @init, <<EOF;
 #if   !($D)
-	New(31338, PL_reentrant_buffer->_${genfunc}_buffer, PL_reentrant_buffer->_${genfunc}_size, char);
+	Newx(PL_reentrant_buffer->_${genfunc}_buffer, PL_reentrant_buffer->_${genfunc}_size, char);
 #endif
 EOF
 	    push @free, <<EOF;
@@ -610,6 +660,7 @@ EOF
 	push @wrap, $ifdef;
 
 	push @wrap, <<EOF;
+#  if defined(PERL_REENTR_API) && (PERL_REENTR_API+0 == 1)
 #   undef $func
 EOF
 
@@ -661,9 +712,11 @@ EOF
 			     $_ eq 'D' ?
 				 "&PL_reentrant_buffer->_${genfunc}_data" :
 			     $_ eq 'S' ?
-				 ($func =~ /^readdir/ ?
+				 ($func =~ /^readdir\d*$/ ?
 				  "PL_reentrant_buffer->_${genfunc}_struct" :
-				  "&PL_reentrant_buffer->_${genfunc}_struct" ) :
+				  $func =~ /^crypt$/ ?
+				  "PL_reentrant_buffer->_${genfunc}_struct_buffer" :
+				  "&PL_reentrant_buffer->_${genfunc}_struct") :
 			     $_ eq 'T' && $func eq 'drand48' ?
 				 "&PL_reentrant_buffer->_${genfunc}_double" :
 			     $_ =~ /^[ilt]$/ && $func eq 'random' ?
@@ -672,8 +725,15 @@ EOF
 			 } split '', $b;
 		$w = ", $w" if length $v;
 	    }
+
 	    my $call = "${func}_r($v$w)";
-	    $call = "((errno = $call))" if $r eq 'I' && $func ne 'random';
+
+            # 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
@@ -684,20 +744,30 @@ EOF
 	    } else {
 		if ($func =~ /^get/) {
 		    my $rv = $v ? ", $v" : "";
-		    push @wrap, <<EOF;
-#       define $func($v) ($call$test ? $true : (errno == ERANGE ? Perl_reentrant_retry("$func"$rv) : 0))
+		    if ($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;
+	    push @wrap, <<EOF;  # !defined(xxx) && XXX_R_PROTO == REENTRANT_PROTO_Y_TS
 #   endif
 EOF
 	}
 
+	    push @wrap, <<EOF;  # defined(PERL_REENTR_API) && (PERL_REENTR_API+0 == 1)
+#  endif
+EOF
+
 	push @wrap, $endif, "\n";
     }
 }
@@ -717,33 +787,44 @@ typedef struct {
 /* The wrappers. */
 
 @wrap
+
 #endif /* USE_REENTRANT_API */
  
 #endif
 
+/* ex: set ro: */
 EOF
 
-close(H);
+safer_close($h);
+rename_if_different('reentr.h-new', 'reentr.h');
 
 # Prepare to write the reentr.c.
 
-die "reentr.c: $!" unless open(C, ">reentr.c");
-select C;
+# safer_unlink 'reentr.c';
+my $c = safer_open("reentr.c-new");
+select $c;
 print <<EOF;
-/*
+/* -*- buffer-read-only: t -*-
+ *
  *    reentr.c
  *
- *    Copyright (c) 1997-2003, Larry Wall
+ *    Copyright (C) 2002, 2003, 2005, 2006, 2007 by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
  *
  *  !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
- *  This file is built by reentrl.pl from data in reentr.pl.
+ *  This file is built by reentr.pl from data in reentr.pl.
  *
  * "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!"
  *
+ * 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.  
  */
 
 #include "EXTERN.h"
@@ -763,7 +844,7 @@ Perl_reentrant_size(pTHX) {
 void
 Perl_reentrant_init(pTHX) {
 #ifdef USE_REENTRANT_API
-	New(31337, PL_reentrant_buffer, 1, REENTR);
+	Newx(PL_reentrant_buffer, 1, REENTR);
 	Perl_reentrant_size(aTHX);
 @init
 #endif /* USE_REENTRANT_API */
@@ -782,8 +863,16 @@ Perl_reentrant_retry(const char *f, ...)
 {
     dTHX;
     void *retptr = NULL;
+    va_list ap;
 #ifdef USE_REENTRANT_API
-#  if defined(USE_HOSTENT_BUFFER) || defined(USE_GRENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PWENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SRVENT_BUFFER)
+    /* Easier to special case this here than in embed.pl. (Look at what it
+       generates for proto.h) */
+    PERL_ARGS_ASSERT_REENTRANT_RETRY;
+#endif
+    va_start(ap, f);
+    {
+#ifdef USE_REENTRANT_API
+#  if defined(USE_HOSTENT_BUFFER) || defined(USE_GRENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PWENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
     void *p0;
 #  endif
 #  if defined(USE_SERVENT_BUFFER)
@@ -795,9 +884,6 @@ Perl_reentrant_retry(const char *f, ...)
 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
     int anint;
 #  endif
-    va_list ap;
-
-    va_start(ap, f);
 
     switch (PL_op->op_type) {
 #ifdef USE_HOSTENT_BUFFER
@@ -821,7 +907,7 @@ Perl_reentrant_retry(const char *f, ...)
 		    retptr = gethostbyaddr(p0, asize, anint); break;
 	        case OP_GHBYNAME:
 		    p0 = va_arg(ap, void *);
-		    retptr = gethostbyname(p0); break;
+		    retptr = gethostbyname((char *)p0); break;
 	        case OP_GHOSTENT:
 		    retptr = gethostent(); break;
 	        default:
@@ -849,7 +935,7 @@ Perl_reentrant_retry(const char *f, ...)
 		switch (PL_op->op_type) {
 	        case OP_GGRNAM:
 		    p0 = va_arg(ap, void *);
-		    retptr = getgrnam(p0); break;
+		    retptr = getgrnam((char *)p0); break;
 	        case OP_GGRGID:
 #if Gid_t_size < INTSIZE
 		    gid = (Gid_t)va_arg(ap, int);
@@ -888,7 +974,7 @@ Perl_reentrant_retry(const char *f, ...)
 		    retptr = getnetbyaddr(net, anint); break;
 	        case OP_GNBYNAME:
 		    p0 = va_arg(ap, void *);
-		    retptr = getnetbyname(p0); break;
+		    retptr = getnetbyname((char *)p0); break;
 	        case OP_GNETENT:
 		    retptr = getnetent(); break;
 	        default:
@@ -916,7 +1002,7 @@ Perl_reentrant_retry(const char *f, ...)
 		switch (PL_op->op_type) {
 	        case OP_GPWNAM:
 		    p0 = va_arg(ap, void *);
-		    retptr = getpwnam(p0); break;
+		    retptr = getpwnam((char *)p0); break;
 	        case OP_GPWUID:
 #if Uid_t_size < INTSIZE
 		    uid = (Uid_t)va_arg(ap, int);
@@ -950,7 +1036,7 @@ Perl_reentrant_retry(const char *f, ...)
 		switch (PL_op->op_type) {
 	        case OP_GPBYNAME:
 		    p0 = va_arg(ap, void *);
-		    retptr = getprotobyname(p0); break;
+		    retptr = getprotobyname((char *)p0); break;
 	        case OP_GPBYNUMBER:
 		    anint = va_arg(ap, int);
 		    retptr = getprotobynumber(anint); break;
@@ -981,11 +1067,11 @@ Perl_reentrant_retry(const char *f, ...)
 	        case OP_GSBYNAME:
 		    p0 = va_arg(ap, void *);
 		    p1 = va_arg(ap, void *);
-		    retptr = getservbyname(p0, p1); break;
+		    retptr = getservbyname((char *)p0, (char *)p1); break;
 	        case OP_GSBYPORT:
 		    anint = va_arg(ap, int);
 		    p0 = va_arg(ap, void *);
-		    retptr = getservbyport(anint, p0); break;
+		    retptr = getservbyport(anint, (char *)p0); break;
 	        case OP_GSERVENT:
 		    retptr = getservent(); break;
 	        default:
@@ -1000,14 +1086,20 @@ Perl_reentrant_retry(const char *f, ...)
 	/* Not known how to retry, so just fail. */
 	break;
     }
-
-    va_end(ap);
+#else
+    PERL_UNUSED_ARG(f);
 #endif
+    }
+    va_end(ap);
     return retptr;
 }
 
+/* ex: set ro: */
 EOF
 
+safer_close($c);
+rename_if_different('reentr.c-new', 'reentr.c');
+
 __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*
@@ -1026,7 +1118,7 @@ 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	|		|I_BW|I_BI|B_BW|B_BI
+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*
@@ -1040,8 +1132,6 @@ getservbyname CC|netdb	|struct servent	|I_CCSBWR|S_CCSBI|I_CCSD|D=struct servent
 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|I_TS|T=const time_t*
-localtime T	|time	|struct tm	|S_TS|I_TS|T=const time_t*
 random		|stdlib	|struct random_data|I_iS|I_lS|I_St|i=int*|l=long*|t=int32_t*
 readdir T	|dirent	|struct dirent	|I_TSR|I_TS|T=DIR*
 readdir64 T	|dirent	|struct dirent64|I_TSR|I_TS|T=DIR*