patch 8.1.0915: fsync() may not work properly on Mac
Problem: fsync() may not work properly on Mac.
Solution: Use fcntl() with F_FULLFSYNC. (suggested by Justin M. Keyes)
diff --git a/src/proto/fileio.pro b/src/proto/fileio.pro
index 21ac55c..e99cbc8 100644
--- a/src/proto/fileio.pro
+++ b/src/proto/fileio.pro
@@ -7,6 +7,7 @@
void set_forced_fenc(exarg_T *eap);
int check_file_readonly(char_u *fname, int perm);
int buf_write(buf_T *buf, char_u *fname, char_u *sfname, linenr_T start, linenr_T end, exarg_T *eap, int append, int forceit, int reset_changed, int filtering);
+int vim_fsync(int fd);
void msg_add_fname(buf_T *buf, char_u *fname);
void msg_add_lines(int insert_space, long lnum, off_T nchars);
char_u *shorten_fname1(char_u *full_path);