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Index: include/stdio.h
===================================================================
--- include/stdio.h
+++ include/stdio.h
@@ -302,7 +302,9 @@
char *ctermid(char *);
FILE *fdopen(int, const char *);
-int fileno(FILE *);
+#ifndef __FILENO_C
+static __inline int fileno(FILE *);
+#endif
#endif /* __POSIX_VISIBLE */
#if __POSIX_VISIBLE >= 199209
@@ -328,7 +330,9 @@
void clearerr_unlocked(FILE *);
int feof_unlocked(FILE *);
int ferror_unlocked(FILE *);
-int fileno_unlocked(FILE *);
+#ifndef __FILENO_C
+static __inline int fileno_unlocked(FILE *);
+#endif
#endif
#if __POSIX_VISIBLE >= 200112
@@ -482,22 +486,44 @@
extern int __isthreaded;
+#define __sfileno(p) ((p)->_file)
+
+#if __POSIX_VISIBLE
+#ifndef __FILENO_C
+extern int __fileno_mt(FILE *fp);
+static __inline int
+fileno(FILE *p)
+{
+ return (!__isthreaded ? __sfileno(p) : (__fileno_mt)(p));
+}
+#endif
+#endif
+
+#if __BSD_VISIBLE
+/*
+ * See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12
+ * B.8.2.7 for the rationale behind the *_unlocked() macros.
+ */
+#ifndef __FILENO_C
+static __inline int
+fileno_unlocked(FILE *p)
+{
+ return __sfileno(p);
+}
+#endif
+#endif
+
#ifndef __cplusplus
#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
#define __sferror(p) (((p)->_flags & __SERR) != 0)
#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
-#define __sfileno(p) ((p)->_file)
#define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p))
#define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p))
#define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p))
-#if __POSIX_VISIBLE
-#define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p))
-#endif
-
#define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp))
#define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp))
@@ -512,7 +538,6 @@
#define feof_unlocked(p) __sfeof(p)
#define ferror_unlocked(p) __sferror(p)
#define clearerr_unlocked(p) __sclearerr(p)
-#define fileno_unlocked(p) __sfileno(p)
#endif
#if __POSIX_VISIBLE >= 199506
#define getc_unlocked(fp) __sgetc(fp)
Index: lib/libc/stdio/Symbol.map
===================================================================
--- lib/libc/stdio/Symbol.map
+++ lib/libc/stdio/Symbol.map
@@ -164,6 +164,7 @@
FBSD_1.4 {
fdclose;
+ __fileno_mt;
};
FBSDprivate_1.0 {
Index: lib/libc/stdio/fileno.c
===================================================================
--- lib/libc/stdio/fileno.c
+++ lib/libc/stdio/fileno.c
@@ -37,6 +37,7 @@
__FBSDID("$FreeBSD$");
#include "namespace.h"
+#define __FILENO_C
#include <stdio.h>
#include "un-namespace.h"
#include "libc_private.h"
@@ -56,6 +57,22 @@
return (fd);
}
+/*
+ * wrapper for fileno() above, this is to be only used inside stdio.h static __inline fileno() wrapper
+ * to avoid symbol conflict for multithreaded programs (that causes infinite recursion).
+ */
+#if defined(__strong_reference)
+__strong_reference(fileno, __fileno_mt);
+#elif defined(__weak_reference)
+__weak_reference(fileno, __fileno_mt);
+#else
+int
+__fileno_mt(FILE *fp)
+{
+ return fileno(fp);
+}
+#endif
+
int
fileno_unlocked(FILE *fp)
{

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