Fix perl #63924: shmget limited to 32 bit segment size on 64 bit OS

Make sure the size argument to shmget() is not limited by the width of an int.
Instead of storing the argument in an int, just store a pointer to the SV and
use different conversions for semget() and shmget().

1 files changed, 3 insertions, 3 deletions

diff --git a/doio.c b/doio.c
index 6135efa46d..2e5947f9c3 100644
--- a/doio.c
+++ b/doio.c
@@ -1981,7 +1981,7 @@ Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
 {
     dVAR;
     const key_t key = (key_t)SvNVx(*++mark);
-    const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
+    SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
     const I32 flags = SvIVx(*++mark);
 
     PERL_ARGS_ASSERT_DO_IPCGET;
@@ -1996,11 +1996,11 @@ Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
 #endif
 #ifdef HAS_SEM
     case OP_SEMGET:
-	return semget(key, n, flags);
+	return semget(key, (int) SvIV(nsv), flags);
 #endif
 #ifdef HAS_SHM
     case OP_SHMGET:
-	return shmget(key, n, flags);
+	return shmget(key, (size_t) SvUV(nsv), flags);
 #endif
 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
     default: