utimes(2)utimes(2)Nameutimes - set file times
Syntax
#include <sys/time.h>
int utimes(file, tvp)
char *file;
struct timeval *tvp;
Description
The call sets the access and modification times of the file named by
file.
If tvp 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, the
superuser, or have write permission to use in this manner.
If tvp is not NULL, it is assumed to point to an array of two timeval
structures. The access time is set to the value of the first member,
and the modification time is set to the value of the second member.
Only the owner of the file or the super-user may use in this manner.
In either case, the inode-changed time of the file is set to the cur‐
rent time.
Return Values
Upon successful completion, a value of zero (0) is returned. Other‐
wise, a value of -1 is returned, and errno is set to indicate the
error.
Diagnostics
The system call fails if one or more of the following are true:
[EACCES] Search permission is denied for a component of the
path prefix.
[EACCES] The tvp argument is NULL and the caller is not the
owner of the file; write access is denied.
[EFAULT] The file or tvp points outside the process's allo‐
cated address space.
[EINVAL] An illegal timeval (that is, negative seconds or
microseconds greater than 999999) was supplied.
[EIO] An I/O error occurred while reading or writing the
affected inode.
[ELOOP] Too many symbolic links were encountered in trans‐
lating the pathname.
[ENAMETOOLONG] A component of a pathname exceeds 255 characters,
or an entire pathname exceeds 1023 characters.
[ENOENT] The named file does not exist.
[ENOTDIR] A component of the path prefix is not a directory.
[EPERM] The tvp argument is not NULL, the caller has write
access, the caller is not the owner of the file,
and the caller is not the superuser.
[EROFS] The file system containing the file is mounted
read-only.
[ETIMEDOUT] A connect request or remote file operation failed,
because the connected party did not respond after a
period of time determined by the communications
protocol.
See Alsostat(2)utimes(2)
