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Index: sys/sys/fcntl.h
===================================================================
--- sys/sys/fcntl.h
+++ sys/sys/fcntl.h
@@ -207,35 +207,56 @@
* Constants used for fcntl(2)
*/
+#define __fcntl_type_attr(type) __datatype_type_tag(fcntl, type)
+
/* command values */
-#define F_DUPFD 0 /* duplicate file descriptor */
-#define F_GETFD 1 /* get file descriptor flags */
-#define F_SETFD 2 /* set file descriptor flags */
-#define F_GETFL 3 /* get file status flags */
-#define F_SETFL 4 /* set file status flags */
+static const int __F_DUPFD __fcntl_type_attr(int) = 0;
+#define F_DUPFD __F_DUPFD /* duplicate file descriptor */
+static const int __F_GETFD __fcntl_type_attr(void) = 1;
+#define F_GETFD __F_GETFD /* get file descriptor flags */
+static const int __F_SETFD __fcntl_type_attr(int) = 2;
+#define F_SETFD __F_SETFD /* set file descriptor flags */
+static const int __F_GETFL __fcntl_type_attr(void) = 3;
+#define F_GETFL __F_GETFL /* get file status flags */
+static const int __F_SETFL __fcntl_type_attr(int) = 4;
+#define F_SETFL __F_SETFL /* set file status flags */
#if __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
-#define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */
-#define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */
+static const int __F_GETOWN __fcntl_type_attr(pid_t) = 5;
+#define F_GETOWN __F_GETOWN /* get SIGIO/SIGURG proc/pgrp */
+static const int __F_SETOWN __fcntl_type_attr(pid_t) = 6;
+#define F_SETOWN __F_SETOWN /* set SIGIO/SIGURG proc/pgrp */
#endif
#if __BSD_VISIBLE
-#define F_OGETLK 7 /* get record locking information */
-#define F_OSETLK 8 /* set record locking information */
-#define F_OSETLKW 9 /* F_SETLK; wait if blocked */
-#define F_DUP2FD 10 /* duplicate file descriptor to arg */
+static const int __F_OGETLK __fcntl_type_attr(int) = 7;
+#define F_OGETLK __F_OGETLK /* get record locking information */
+static const int __F_OSETLK __fcntl_type_attr(int) = 8;
+#define F_OSETLK __F_OSETLK /* set record locking information */
+static const int __F_OSETLKW __fcntl_type_attr(int) = 9;
+#define F_OSETLKW __F_OSETLKW /* F_SETLK; wait if blocked */
+static const int __F_DUP2FD __fcntl_type_attr(int) = 10;
+#define F_DUP2FD __F_DUP2FD /* duplicate file descriptor to arg */
#endif
-#define F_GETLK 11 /* get record locking information */
-#define F_SETLK 12 /* set record locking information */
-#define F_SETLKW 13 /* F_SETLK; wait if blocked */
+static const int __F_GETLK __fcntl_type_attr(__intptr_t) = 11;
+#define F_GETLK __F_GETLK /* get record locking information */
+static const int __F_SETLK __fcntl_type_attr(__intptr_t) = 12;
+#define F_SETLK __F_SETLK /* set record locking information */
+static const int __F_SETLKW __fcntl_type_attr(__intptr_t) = 13;
+#define F_SETLKW __F_SETLKW /* F_SETLK; wait if blocked */
#if __BSD_VISIBLE
-#define F_SETLK_REMOTE 14 /* debugging support for remote locks */
-#define F_READAHEAD 15 /* read ahead */
-#define F_RDAHEAD 16 /* Darwin compatible read ahead */
+static const int __F_SETLK_REMOTE __fcntl_type_attr(__intptr_t) = 14;
+#define F_SETLK_REMOTE __F_SETLK_REMOTE /* debugging support for remote locks */
+static const int __F_READAHEAD __fcntl_type_attr(int) = 15;
+#define F_READAHEAD __F_READAHEAD /* read ahead */
+static const int __F_RDAHEAD __fcntl_type_attr(int) = 16;
+#define F_RDAHEAD __F_RDAHEAD /* Darwin compatible read ahead */
#endif
#if __POSIX_VISIBLE >= 200809
-#define F_DUPFD_CLOEXEC 17 /* Like F_DUPFD, but FD_CLOEXEC is set */
+static const int __F_DUPFD_CLOEXEC __fcntl_type_attr(int) = 17;
+#define F_DUPFD_CLOEXEC __F_DUPFD_CLOEXEC /* Like F_DUPFD, but FD_CLOEXEC is set */
#endif
#if __BSD_VISIBLE
-#define F_DUP2FD_CLOEXEC 18 /* Like F_DUP2FD, but FD_CLOEXEC is set */
+static const int __F_DUP2FD_CLOEXEC __fcntl_type_attr(int) = 18;
+#define F_DUP2FD_CLOEXEC __F_DUP2FD_CLOEXEC /* Like F_DUP2FD, but FD_CLOEXEC is set */
#endif
/* file descriptor flags (F_GETFD, F_SETFD) */
@@ -308,7 +329,7 @@
__BEGIN_DECLS
int open(const char *, int, ...);
int creat(const char *, mode_t);
-int fcntl(int, int, ...);
+int fcntl(int, int, ...) __arg_type_tag(fcntl, 3, 2);
#if __BSD_VISIBLE
int flock(int, int);
#endif

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