UTIME(3) BSD Library Functions Manual UTIME(3)NAMEutime — set file times
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <utime.h>
int
utime(const char *file, const struct utimbuf *timep);
DESCRIPTION
This interface is obsoleted by utimes(2).
The utime() function sets the access and modification times of the named
file.
If timep is NULL, the access and modification times are set to the cur‐
rent time. The calling process must be the owner of the file or have
permission to write the file.
If timep is non-NULL, time is assumed to be a pointer to a utimbuf struc‐
ture, as defined in <utime.h>:
struct utimbuf {
time_t actime; /* Access time */
time_t modtime; /* Modification time */
};
The access time is set to the value of the actime member, and the modifi‐
cation time is set to the value of the modtime member. The times are
measured in seconds since 0 hours, 0 minutes, 0 seconds, January 1, 1970
Coordinated Universal Time (UTC). The calling process must be the owner
of the file or be the super-user.
In either case, the inode-change-time of the file is set to the current
time.
RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, a value
of -1 is returned and errno is set to indicate the error.
ERRORSutime() will fail if:
[EACCES] Search permission is denied for a component of the
path prefix; or the times argument is NULL and the
effective user ID of the process does not match the
owner of the file, and is not the super-user, and
write access is denied.
[EFAULT] file or times points outside the process's allocated
address space.
[EINVAL] The pathname contains a character with the high-order
bit set.
[EIO] An I/O error occurred while reading or writing the
affected inode.
[ELOOP] Too many symbolic links were encountered in translat‐
ing the pathname.
[ENAMETOOLONG] A component of a pathname exceeded 255 characters, or
an entire path name exceeded 1023 characters.
[ENOENT] The named file does not exist.
[ENOTDIR] A component of the path prefix is not a directory.
[EPERM] The times argument is not NULL and the calling
process's effective user ID does not match the owner
of the file and is not the super-user.
[EROFS] The file system containing the file is mounted read-
only.
SEE ALSOstat(2), utimes(2)STANDARDS
The utime() function conforms to ISO/IEC 9945-1:1990 (“POSIX.1”). It was
however marked as legacy in the IEEE Std 1003.1-2008 (“POSIX.1”) revision
of the standard.
HISTORY
A utime() function appeared in Version 7 AT&T UNIX.
BSD April 29, 2010 BSD
