libc: Add fopencookie(3) wrapper around funopen(3)

Reviewed by:	jhb, oshogbo
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D6282

1 files changed, 17 insertions, 0 deletions

diff --git a/include/stdio.h b/include/stdio.h
index f55aaf7..7241386 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -58,6 +58,11 @@ typedef	__ssize_t	ssize_t;
 #endif
 #endif
 
+#ifndef _OFF64_T_DECLARED
+#define	_OFF64_T_DECLARED
+typedef	__off_t		off64_t;
+#endif
+
 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
 #ifndef _VA_LIST_DECLARED
 typedef	__va_list	va_list;
@@ -427,6 +432,18 @@ FILE	*funopen(const void *,
 #define	fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
 #define	fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
 
+typedef ssize_t (cookie_read_function_t)(void *, char *, size_t);
+typedef ssize_t (cookie_write_function_t)(void *, const char *, size_t);
+typedef int (cookie_seek_function_t)(void *, off64_t *, int);
+typedef int (cookie_close_function_t)(void *);
+typedef struct {
+	cookie_read_function_t	*read;
+	cookie_write_function_t	*write;
+	cookie_seek_function_t	*seek;
+	cookie_close_function_t	*close;
+} cookie_io_functions_t;
+FILE	*fopencookie(void *, const char *, cookie_io_functions_t);
+
 /*
  * Portability hacks.  See <sys/types.h>.
  */