Content-type: text/html Man page of umount

umount

Section: C Library Functions (3)
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NAME

umount - Unmounts a file system  

LIBRARY

System V Compatibility Library (libsys5.a)  

SYNOPSIS

#include <sys/mount.h>

int umount(

char *
spec );
 

PARAMETERS

spec
Points to the pathname of the special file or file system to be unmounted.
 

DESCRIPTION

The umount() function unmounts a previously-mounted file system contained on the block special file pointed to by the spec parameter. When the file system is unmounted, the directory mount point where the file system was mounted returns to its normal interpretation.

The umount() function can only be invoked by the superuser.  

NOTES

Two umount() functions are supported by the Tru64 UNIX operating system: the BSD umount() and the System V umount(). The default umount() function is the BSD umount(). To use the version of umount() documented on this reference page, you must link with the libsys5 library before you link with libc.  

RETURN VALUE

The umount() function returns 0 (zero) if the file system was successfully unmounted. Otherwise, -1 is returned and errno is set to indicate the error.

 

ERRORS

If the umount() function fails, errno may be set to one of the following values:
[EPERM]
The effective user ID of the calling process is not root.
[ENOENT]
The spec parameter points to a pathname that does not exist.
[ENOTDIR]
A component of the path prefix of spec is not a directory.
[ENOTBLK]
The device identified by spec is not a block-special device.
[ENXIO]
The device identified by spec does not exist.
[EBUSY]
A file on the device pointed to by the spec parameter is busy.
[EINVAL]
The device pointed to by the spec parameter is not mounted.
 

RELATED INFORMATION

Commands: mount(8) delim off


 

Index

NAME
LIBRARY
SYNOPSIS
PARAMETERS
DESCRIPTION
NOTES
RETURN VALUE
ERRORS
RELATED INFORMATION

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Time: 02:41:36 GMT, October 02, 2010