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-rw-r--r--perliol.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/perliol.h b/perliol.h
index c14e823efe..a84d1c6ff1 100644
--- a/perliol.h
+++ b/perliol.h
@@ -158,6 +158,7 @@ extern PerlIO *PerlIOBuf_open(pTHX_ PerlIO_funcs *self,
const char *mode, int fd, int imode,
int perm, PerlIO *old, int narg, SV **args);
extern IV PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg);
+extern PerlIO *PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param);
extern SSize_t PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count);
extern SSize_t PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count);
extern SSize_t PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count);