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31 .\" @(#)utimes.2 8.1 (Berkeley) 6/4/93
40 .Nd set file access and modification times
46 .Fn futimens "int fd" "const struct timespec times[2]"
50 .Fa "const char *path"
51 .Fa "const struct timespec times[2]"
55 The access and modification times of the file named by
59 are changed as specified by the argument
61 The inode-change-time of the file is set to the current time.
65 specifies a relative path,
66 it is relative to the current working directory if
70 and otherwise relative to the directory associated with the file descriptor
78 can be set to the special value
80 to set the current time, or to
82 to leave the time unchanged.
91 it is assumed to point to an array of two timespec structures.
92 The access time is set to the value of the first element, and the
93 modification time is set to the value of the second element.
98 this is equivalent to passing
99 a pointer to an array of two timespec structures
109 the timestamps remain unchanged and
110 no permissions are needed for the file itself,
111 although search permissions may be required for the path prefix.
112 The call may or may not succeed if the named file does not exist.
118 the caller must be the owner of the file, have permission to
119 write the file, or be the super-user.
121 For all other values of the timestamps,
122 the caller must be the owner of the file or be the super-user.
129 are constructed by a bitwise-inclusive OR of flags from the following list,
132 .Bl -tag -width indent
133 .It Dv AT_SYMLINK_NOFOLLOW
136 names a symbolic link, the symbolic link's times are changed.
139 changes the times of the file referenced by the symbolic link.
144 These system calls will fail if:
155 and the effective user ID of the process does not
156 match the owner of the file, and is not the super-user, and write
162 points outside the process's allocated address space.
166 component of at least one of the values specified by the
168 argument has a value less than 0 or greater than 999999.
170 An I/O error occurred while reading or writing the affected inode.
184 and the calling process's effective user ID
185 does not match the owner of the file and is not the super-user.
187 The named file has its immutable or append-only flag set, see the
189 manual page for more information.
191 The file system containing the file is mounted read-only.
203 does not refer to a valid descriptor.
212 Search permission is denied for a component of the path prefix.
216 argument does not specify an absolute path and the
220 nor a valid file descriptor.
225 points outside the process's allocated address space.
227 Too many symbolic links were encountered in translating the pathname.
228 .It Bq Er ENAMETOOLONG
229 A component of a pathname exceeded
231 characters, or an entire path name exceeded
235 The named file does not exist.
237 A component of the path prefix is not a directory.
241 argument is not an absolute path and
245 nor a file descriptor associated with a directory.
247 The running kernel does not support this system call and
248 .Dv AT_SYMLINK_NOFOLLOW
249 is used with a path relative to a file descriptor.
263 system calls are expected to conform to
270 system calls appeared in