win32: add fcntl()

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>

2 files changed, 15 insertions, 1 deletions

diff --git a/include/mingw.h b/include/mingw.h
index bfe21137d..3283a1364 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -254,7 +254,7 @@ IMPL(getegid,int,1,void);
 IMPL(geteuid,int,1,void);
 NOIMPL(getsid,pid_t pid UNUSED_PARAM);
 IMPL(getuid,int,1,void);
-NOIMPL(fcntl,int fd UNUSED_PARAM, int cmd UNUSED_PARAM, ...);
+int fcntl(int fd, int cmd, ...);
 #define fork() -1
 IMPL(fsync,int,0,int fd UNUSED_PARAM);
 NOIMPL(kill,pid_t pid UNUSED_PARAM, int sig UNUSED_PARAM);
diff --git a/win32/mingw.c b/win32/mingw.c
index bd855dc7a..652406d13 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -387,3 +387,17 @@ int mingw_mkdir(const char *path, int mode UNUSED_PARAM)
 {
         return mkdir(path);
 }
+
+int fcntl(int fd UNUSED_PARAM, int cmd, ...)
+{
+        /*
+         * F_GETFL needs to be dealt at higher level
+         * Usually it does not matter if the call is
+         *   fcntl(fd, F_SETFL, fcntl(fd, F_GETFD) | something)
+         * because F_SETFL is not supported
+         */
+        if (cmd == F_GETFD || cmd == F_SETFD || cmd == F_GETFL)
+                return 0;
+        errno = EINVAL;
+        return -1;
+}