umount(2)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | USAGE | SUMMARY OF TRUSTED SOLARIS CHANGES | SEE ALSO

NAME

umount, umount2– unmount a file system

SYNOPSIS

#include <sys/mount.h>

int umount(const char *file);
int umount2(const char *file, int mflag);

DESCRIPTION

The umount() function requests that a previously mounted file system contained on the block special device or directory identified by file be unmounted. The file argument is a pointer to a path name. After unmounting the file system, the directory upon which the file system was mounted reverts to its ordinary interpretation.

For all file system types except namefs, umount() may be invoked by a calling process with the PRIV_SYS_MOUNT privilege. For the namefs file system, the calling process must either be the owner of file or assert the PRIV_FILE_OWNER privilege.

RETURN VALUES

umount() returns:

0

On success.

-1

On failure, and sets errno to indicate the error.

ERRORS

The umount() function will fail if:

EACCES

Search permission is denied on a component of file. To override this restriction, the calling process may assert one or both of these privileges: PRIV_FILE_DAC_SEARCH and PRIV_FILE_MAC_SEARCH.

EBUSY

A file on file is busy.

EFAULT

The file pointed to by file points to an illegal address.

EINVAL

The file pointed to by file is not mounted.

ENOENT

The file pointed to by file does not exist.

ELOOP

Too many symbolic links were encountered in translating the path pointed to by file.

ENAMETOOLONG

The length of the file argument exceeds PATH_MAX, or the length of a file component exceeds NAME_MAX while _POSIX_NO_TRUNC is in effect.

ENOLINK

The file pointed to by file is on a remote machine, and the link to that machine is no longer active.

ENOTBLK

The file pointed to by file is not a block special device.

EPERM

The calling process does not own file and file is a file system of type namefs. To override this restriction, the calling process may assert the PRIV_FILE_OWNER.

file is not a file system of type namefs and the calling process has not asserted the PRIV_SYS_MOUNT privilege.

EREMOTE

The file pointed to by file is remote.

USAGE

The umount() function may be invoked by a calling process with the appropriate privilege.

SUMMARY OF TRUSTED SOLARIS CHANGES

Appropriate privilege is required to override access or ownership checks.

For all file system types except namefs, the umount() system call may be invoked by a calling process with the PRIV_SYS_MOUNT privilege. For the namefs file system, the calling process must either be the owner of file or assert the PRIV_FILE_OWNER privilege.

SEE ALSO

Trusted Solaris 8 HW 12/02 Reference Manual

mount(2)

Trusted Solaris 8 HW 12/02  Last Revised 30 Sep 1999

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | USAGE | SUMMARY OF TRUSTED SOLARIS CHANGES | SEE ALSO