utime(2)
utime --
set file access and modification times
Synopsis
#include <sys/types.h>
#include <utime.h>
int utime(const char
path, const struct utimbuf
times);
Description
utime sets the access and modification times
of the file named by path.
path points to a pathname naming a file.
If times is NULL,
the access and modification times of the file are set to the current time.
A process must be the owner of the file or have write permission to use
utime in this manner.
If times is not NULL, times is interpreted as a pointer
to a utimbuf structure (defined in utime.h) and
the access and modification times are set to the values contained in
the designated structure.
Only the owner of the file may use utime this way.
The times in the following structure are measured in seconds since
00:00:00
UTC,
Jan. 1, 1970, and includes the following members:
time_t actime; /
access time
/
time_t modtime; /
modification time
/
utime also causes the time of the last file status change
(st_ctime) to be updated.
Return values
On success, utime returns 0.
On failure, utime returns -1 and sets errno to identify the error.
In the following conditions, utime fails and sets errno to:
- EACCES
-
Search permission is denied by a component of the path prefix.
- EACCES
-
Write permission on the file named by path is denied.
- EACCES
-
The effective user ID is not the owner of the file, times is
NULL, and write access is denied.
- EFAULT
-
times is not NULL
and points outside the process's allocated address space.
- EFAULT
-
path points outside the process's allocated address space.
- EINTR
-
A signal was caught during the utime system call.
- ELOOP
-
Too many symbolic links were encountered in translating path.
- EMULTIHOP
-
Components of path require hopping to multiple
remote machines and the file system does not allow it.
- ENAMETOOLONG
-
The length of the path argument exceeds {PATH_MAX}, or the
length of a path component exceeds {NAME_MAX} while
_POSIX_NO_TRUNC is in effect.
- ENOENT
-
The named file does not exist or is a null pathname.
- ENOLINK
-
path points to a remote machine and the link
to that machine is no longer active.
- ENOTDIR
-
A component of the path prefix is not a directory.
- EPERM
-
The calling process does not have the P_OWNER privilege, the
effective user ID is
not the owner of the file, and times is not NULL.
- EPERM
-
The calling process does not have the P_OWNER privilege, the
effective user ID is not the owner of the file, times is NULL,
and write permission on the file named by path is denied.
- EROFS
-
The file system containing the file is mounted read-only.
References
stat(2)
30 January 1998
© 1998 The Santa Cruz Operation, Inc. All rights reserved.