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30 .\" @(#)utimes.2 8.1 (Berkeley) 6/4/93
41 .Nd set file access and modification times
47 .Fn utimes "const char *path" "const struct timeval *times"
49 .Fn lutimes "const char *path" "const struct timeval *times"
51 .Fn futimes "int fd" "const struct timeval *times"
53 .Fn futimesat "int fd" "const char *path" "const struct timeval times[2]"
55 The access and modification times of the file named by
59 are changed as specified by the argument
66 the access and modification times are set to the current time.
67 The caller must be the owner of the file, have permission to
68 write the file, or be the super-user.
74 it is assumed to point to an array of two timeval structures.
75 The access time is set to the value of the first element, and the
76 modification time is set to the value of the second element.
77 For file systems that support file birth (creation) times (such as
79 the birth time will be set to the value of the second element
80 if the second element is older than the currently set birth time.
81 To set both a birth time and a modification time,
82 two calls are required; the first to set the birth time
83 and the second to set the (presumably newer) modification time.
84 Ideally a new system call will be added that allows the setting
85 of all three times at once.
86 The caller must be the owner of the file or be the super-user.
88 In either case, the inode-change-time of the file is set to the current
96 except in the case where the named file is a symbolic link,
99 changes the access and modification times of the link,
102 changes the times of the file the link references.
106 system call is equivalent to
108 except in the case where
110 specifies a relative path.
111 In this case the access and modification time
112 is set to that of a file relative to the directory associated with the file
115 instead of the current working directory.
118 is passed the special value
122 parameter, the current working directory is used and the behavior
123 is identical to a call to
128 All of the system call will fail if:
131 Search permission is denied for a component of the path prefix.
137 and the effective user ID of the process does not
138 match the owner of the file, and is not the super-user, and write
146 points outside the process's allocated address space.
151 points outside the process's allocated address space.
155 component of at least one of the values specified by the
157 argument has a value less than 0 or greater than 999999.
159 An I/O error occurred while reading or writing the affected inode.
161 Too many symbolic links were encountered in translating the pathname.
162 .It Bq Er ENAMETOOLONG
163 A component of a pathname exceeded
165 characters, or an entire path name exceeded
169 The named file does not exist.
171 A component of the path prefix is not a directory.
177 and the calling process's effective user ID
178 does not match the owner of the file and is not the super-user.
180 The named file has its immutable or append-only flags set.
183 manual page for more information.
185 The file system containing the file is mounted read-only.
197 does not refer to a valid descriptor.
200 In addition to the errors returned by the
209 argument does not specify an absolute path and the
213 nor a valid file descriptor open for searching.
217 argument is not an absolute path and
221 nor a file descriptor associated with a directory.
230 function is expected to conform to
234 system call follows The Open Group Extended API Set 2 specification.
238 system call appeared in
244 system calls first appeared in
248 system call appeared in