mount.2 (2010 09)

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mount(2) mount(2)

NAME

mount() - mount a ﬁle system

SYNOPSIS

#include <sys/mount.h>

int mount(const char *fs, const char *path, int mflag);

int mount(const char *fs,

const char *path,

int mflag,

const char *fstype,

const char *dataptr,

int datalen);

DESCRIPTION

The mount() system call requests that a ﬁle system identiﬁed by fs be mounted on the ﬁle identiﬁed by

path.

mﬂag contains a bit-mask of ﬂags (described below). Note that the

MS_DATA ﬂag must be set for the six-

argument version of the call.

fstype is the ﬁle system type name. It is the same name that

sysfs() uses.

The last two arguments together describe a block of ﬁle-system-speciﬁc data at address dataptr of length

datalen . This is interpreted by ﬁle-system-speciﬁc code within the operating system and its format

depends upon the ﬁle system type. A particular ﬁle system type may not require this data, in which case

dataptr and datalen should both be zero. The mounting of some ﬁle system types may be restricted to a

user with appropriate privileges.

mount() can be invoked only by a user who has appropriate privileges.

Upon successful completion, references to the ﬁle path will refer to the root directory of the mounted ﬁle

system.

mﬂag contains a bit-mask of ﬂag values, which includes the following deﬁned in

<sys/mount.h>:

MS_DATA This is ordinarily required. It indicates the presence of the fstype, dataptr , and

datalen arguments.

(For backward compatibility, if this ﬂag is not set, the fstype is assumed to be that

of the root ﬁle system, and dataptr and datalen are assumed to be zero.)

MS_RDONLY This is used to control write permission on the mounted ﬁle system. If not set, writ-

ing is permitted according to individual ﬁle accessibility.

MS_NOSUID This ﬂag disables set-user-ID and set-group-ID behavior on this ﬁle system.

MS_QUOTA

MS_USRQUOTA

This causes user quotas to be enabled if the ﬁle system supports user quotas.

MS_GRPQUOTA

This causes group quotas to be enabled if the ﬁle system supports group quotas.

If fstype is speciﬁed as:

MNTTYPE_HFS

Mount a local HFS ﬁle system. dataptr points to a structure of the following for-

mat, if the options described below need to be speciﬁed for the mount:

struct ufs_args {

char *fspec;

int flags;

};

fspec points to the name of the block special ﬁle that is to be mounted. This is

identical in use and function to the ﬁrst argument, fs, of the system call.

HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1

Summary of content (4 pages)

PAGE 1
mount(2) mount(2) NAME mount() - mount a file system SYNOPSIS #include int mount(const char *fs, const char *path, int mflag); int mount(const char *fs, const char *path, int mflag, const char *fstype, const char *dataptr, int datalen); DESCRIPTION The mount() system call requests that a file system identified by fs be mounted on the file identified by path. mflag contains a bit-mask of flags (described below). Note that the MS_DATA flag must be set for the sixargument version of the call.
PAGE 2
mount(2) mount(2) flags points to a bit map that sets options. The following values of the bits are defined in : MS_DELAY Writes to disks are to be delayed until the buffer needs to be reused. This is the default. MS_BEHIND Writes to disks are to be done asynchronously, where possible, without waiting for completion. MS_BEHIND and MS_DELAY are mutually exclusive. MS_NO_FSASYNC Rigorous posting of file system metadata is to be used. This is the default.
PAGE 3
mount(2) mount(2) SEE ALSO mount(1M), sysfs(2), umount(2), privileges(5).
PAGE 4
(Notes) A (Notes) mA 4 Hewlett-Packard Company −1− HP-UX 11i Version 3: September 2010