bsd-user: Implement fdatasync, fsync and close_from

Implement fdatasync(2), fsync(2) and close_from(2).

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Jung-uk Kim <jkim@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

2 files changed, 31 insertions, 0 deletions

diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h
index 2bd312f8e1..94eb03df62 100644
--- a/bsd-user/bsd-file.h
+++ b/bsd-user/bsd-file.h
@@ -239,4 +239,23 @@ static inline abi_long do_bsd_close(abi_long arg1)
     return get_errno(close(arg1));
 }
 
+/* fdatasync(2) */
+static abi_long do_bsd_fdatasync(abi_long arg1)
+{
+    return get_errno(fdatasync(arg1));
+}
+
+/* fsync(2) */
+static abi_long do_bsd_fsync(abi_long arg1)
+{
+    return get_errno(fsync(arg1));
+}
+
+/* closefrom(2) */
+static abi_long do_bsd_closefrom(abi_long arg1)
+{
+    closefrom(arg1);  /* returns void */
+    return get_errno(0);
+}
+
 #endif /* BSD_FILE_H */
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index a824785fee..f7d0990992 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -273,6 +273,18 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
         ret = do_bsd_close(arg1);
         break;
 
+    case TARGET_FREEBSD_NR_fdatasync: /* fdatasync(2) */
+        ret = do_bsd_fdatasync(arg1);
+        break;
+
+    case TARGET_FREEBSD_NR_fsync: /* fsync(2) */
+        ret = do_bsd_fsync(arg1);
+        break;
+
+    case TARGET_FREEBSD_NR_freebsd12_closefrom: /* closefrom(2) */
+        ret = do_bsd_closefrom(arg1);
+        break;
+
     default:
         qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
         ret = -TARGET_ENOSYS;