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30 .\" @(#)utimes.2 8.1 (Berkeley) 6/4/93
40 .Nd set file access and modification times
46 .Fn utimes "const char *path" "const struct timeval *times"
48 .Fn lutimes "const char *path" "const struct timeval *times"
50 .Fn futimes "int fd" "const struct timeval *times"
52 The access and modification times of the file named by
56 are changed as specified by the argument
63 the access and modification times are set to the current time.
64 The caller must be the owner of the file, have permission to
65 write the file, or be the super-user.
71 it is assumed to point to an array of two timeval structures.
72 The access time is set to the value of the first element, and the
73 modification time is set to the value of the second element.
74 For file systems that support file birth (creation) times (such as
76 the birth time will be set to the value of the second element
77 if the second element is older than the currently set birth time.
78 To set both a birth time and a modification time,
79 two calls are required; the first to set the birth time
80 and the second to set the (presumably newer) modification time.
81 Ideally a new system call will be added that allows the setting
82 of all three times at once.
83 The caller must be the owner of the file or be the super-user.
85 In either case, the inode-change-time of the file is set to the current
93 except in the case where the named file is a symbolic link,
96 changes the access and modification times of the link,
99 changes the times of the file the link references.
111 Search permission is denied for a component of the path prefix;
116 and the effective user ID of the process does not
117 match the owner of the file, and is not the super-user, and write
125 points outside the process's allocated address space.
127 An I/O error occurred while reading or writing the affected inode.
129 Too many symbolic links were encountered in translating the pathname.
130 .It Bq Er ENAMETOOLONG
131 A component of a pathname exceeded
133 characters, or an entire path name exceeded
137 The named file does not exist.
139 A component of the path prefix is not a directory.
145 and the calling process's effective user ID
146 does not match the owner of the file and is not the super-user.
148 The named file has its immutable or append-only flag set, see the
150 manual page for more information.
152 The file system containing the file is mounted read-only.
164 does not refer to a valid descriptor.
167 All of the system calls will fail if:
174 and the effective user ID of the process does not
175 match the owner of the file, and is not the super-user, and write
181 points outside the process's allocated address space.
185 component of at least one of the values specified by the
187 argument has a value less than 0 or greater than 999999.
189 An I/O error occurred while reading or writing the affected inode.
195 and the calling process's effective user ID
196 does not match the owner of the file and is not the super-user.
198 The file system containing the file is mounted read-only.
207 system call appeared in
213 system calls first appeared in