---
name: "sync_volume_np"
section: "3"
platform: "macos"
package: "Libc"
version: "1752.120.2"
release: "macOS 26.5"
platforms: ["macos"]
url: "https://new.carta.tech/sync_volume_np"
---

# sync\_volume\_np(3)

Sync a mounted filesystem

## NAME

**sync\_volume\_np** – Sync a mounted filesystem

## LIBRARY

Standard C Library (libc, -lc)

## SYNOPSIS

**#include \<unistd.h\>**

*int*\

**sync\_volume\_np**(*const char \*path*, *int flags*);

*int*\

**fsync\_volume\_np**(*int fd*, *int flags*);

## DESCRIPTION

The **sync\_volume\_np**() function causes data and metadata on the filesystem containing *path* to be synced to disk; this may be any file or directory on that filesystem.  The **fsync\_volume\_np**() does the same thing, but using an open file descriptor for that filesystem. Both functions take a flags parameter, with the currently-defined options:

- SYNC\_VOLUME\_FULLSYNC

  Request that the data and metadata be written to the disk hardware; if not set, then the hardware may keep it in cache.

- SYNC\_VOLUME\_WAIT

  Wait for the data and metadata to be written; if not set, then it will return when the requests have been made.

## RETURN VALUES

Both functions return 0 on success, and a non-zero error code on error.

## ERRORS

The **fsync\_volume\_np**() function may return EBADF if the *fd* parameter is not a valid, open file descriptor. The **sync\_volume\_np**() function may return errors if:

- \[EACCES\]

  Search permission is denied for a component of the path prefix.

- \[EIO\]

  An I/O error occurs while reading from or writing to the file system.

- \[ELOOP\]

  Too many symbolic links are encountered in translating the pathname. This is taken to be indicative of a looping symbolic link.

- \[ENAMETOOLONG\]

  A component of a pathname exceeds {NAME\_MAX} characters, or an entire path name exceeds {PATH\_MAX} characters.

- \[ENOENT\]

  The named file does not exist.

- \[ENOTDIR\]

  A component of the path prefix is not a directory.