1 #include <linux/compiler.h>
3 #include <linux/linkage.h>
4 #include <linux/namei.h>
5 #include <linux/utime.h>
6 #include <asm/uaccess.h>
7 #include <asm/unistd.h>
9 #ifdef __ARCH_WANT_SYS_UTIME
12 * sys_utime() can be implemented in user-level using sys_utimes().
13 * Is this for backwards compatibility? If so, why not move it
14 * into the appropriate arch directory (for those architectures that
18 /* If times==NULL, set access and modification to current time,
19 * must be owner or have write permission.
20 * Else, update from *times, must be owner or super user.
22 asmlinkage
long sys_utime(char __user
* filename
, struct utimbuf __user
* times
)
27 struct iattr newattrs
;
29 error
= user_path_walk(filename
, &nd
);
32 inode
= nd
.dentry
->d_inode
;
38 /* Don't worry, the checks are done in inode_change_ok() */
39 newattrs
.ia_valid
= ATTR_CTIME
| ATTR_MTIME
| ATTR_ATIME
;
42 if (IS_APPEND(inode
) || IS_IMMUTABLE(inode
))
45 error
= get_user(newattrs
.ia_atime
.tv_sec
, ×
->actime
);
46 newattrs
.ia_atime
.tv_nsec
= 0;
48 error
= get_user(newattrs
.ia_mtime
.tv_sec
, ×
->modtime
);
49 newattrs
.ia_mtime
.tv_nsec
= 0;
53 newattrs
.ia_valid
|= ATTR_ATIME_SET
| ATTR_MTIME_SET
;
56 if (IS_IMMUTABLE(inode
))
59 if (current
->fsuid
!= inode
->i_uid
&&
60 (error
= vfs_permission(&nd
, MAY_WRITE
)) != 0)
63 mutex_lock(&inode
->i_mutex
);
64 error
= notify_change(nd
.dentry
, &newattrs
);
65 mutex_unlock(&inode
->i_mutex
);
74 /* If times==NULL, set access and modification to current time,
75 * must be owner or have write permission.
76 * Else, update from *times, must be owner or super user.
78 long do_utimes(int dfd
, char __user
*filename
, struct timeval
*times
)
83 struct iattr newattrs
;
85 error
= __user_walk_fd(dfd
, filename
, LOOKUP_FOLLOW
, &nd
);
89 inode
= nd
.dentry
->d_inode
;
95 /* Don't worry, the checks are done in inode_change_ok() */
96 newattrs
.ia_valid
= ATTR_CTIME
| ATTR_MTIME
| ATTR_ATIME
;
99 if (IS_APPEND(inode
) || IS_IMMUTABLE(inode
))
102 newattrs
.ia_atime
.tv_sec
= times
[0].tv_sec
;
103 newattrs
.ia_atime
.tv_nsec
= times
[0].tv_usec
* 1000;
104 newattrs
.ia_mtime
.tv_sec
= times
[1].tv_sec
;
105 newattrs
.ia_mtime
.tv_nsec
= times
[1].tv_usec
* 1000;
106 newattrs
.ia_valid
|= ATTR_ATIME_SET
| ATTR_MTIME_SET
;
109 if (IS_IMMUTABLE(inode
))
112 if (current
->fsuid
!= inode
->i_uid
&&
113 (error
= vfs_permission(&nd
, MAY_WRITE
)) != 0)
116 mutex_lock(&inode
->i_mutex
);
117 error
= notify_change(nd
.dentry
, &newattrs
);
118 mutex_unlock(&inode
->i_mutex
);
125 asmlinkage
long sys_futimesat(int dfd
, char __user
*filename
, struct timeval __user
*utimes
)
127 struct timeval times
[2];
129 if (utimes
&& copy_from_user(×
, utimes
, sizeof(times
)))
131 return do_utimes(dfd
, filename
, utimes
? times
: NULL
);
134 asmlinkage
long sys_utimes(char __user
*filename
, struct timeval __user
*utimes
)
136 return sys_futimesat(AT_FDCWD
, filename
, utimes
);
This page took 0.03355 seconds and 6 git commands to generate.