UTIMES(2) System Calls Manual UTIMES(2)NAME
utimes - set file times
SYNOPSIS
#include <sys/time.h>
utimes(file, tvp)
char *file;
struct timeval tvp[2];
DESCRIPTION
The utimes call uses the "accessed" and "updated" times in that order from the tvp vector to set the corresponding recorded times for file.
The caller must be the owner of the file or the super-user. The "inode-changed" time of the file is set to the current time.
RETURN VALUE
Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error.
ERRORS
Utime will fail if one or more of the following are true:
[ENOTDIR] A component of the path prefix is not a directory.
[EINVAL] The pathname contains a character with the high-order bit set.
[ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters.
[ENOENT] The named file does not exist.
[ELOOP] Too many symbolic links were encountered in translating the pathname.
[EPERM] The process is not super-user and not the owner of the file.
[EACCES] Search permission is denied for a component of the path prefix.
[EROFS] The file system containing the file is mounted read-only.
[EFAULT] File or tvp points outside the process's allocated address space.
[EIO] An I/O error occurred while reading or writing the affected inode.
SEE ALSO stat(2)4th Berkeley Distribution August 26, 1985 UTIMES(2)
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UTIMES(2) BSD System Calls Manual UTIMES(2)NAME
utimes, futimes -- set file access and modification times
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/time.h>
int
utimes(const char *path, const struct timeval *times);
int
futimes(int fd, const struct timeval *times);
DESCRIPTION
The access and modification times of the file named by path or referenced by fd are changed as specified by the argument times.
If times is NULL, the access and modification times are set to the current time. The caller must be the owner of the file, have permission
to write the file, or be the super-user.
If times is non-NULL, it is assumed to point to an array of two timeval structures. The access time is set to the value of the first ele-
ment, and the modification time is set to the value of the second element. The caller 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, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the
error.
ERRORS
utimes() 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] path or times points outside the process's allocated address space.
[EIO] An I/O error occurred while reading or writing the affected inode.
[ELOOP] Too many symbolic links were encountered in translating the pathname.
[ENAMETOOLONG] A component of a pathname exceeded NAME_MAX characters, or an entire path name exceeded PATH_MAX 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.
futimes() will fail if:
[EBADF] fd does not refer to a valid descriptor.
All of the functions will fail if:
[EACCES] 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] times points outside the process's allocated address space.
[EIO] An I/O error occurred while reading or writing the affected inode.
[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 ALSO stat(2), utime(3)HISTORY
The utimes() function call appeared in 4.2BSD. The futimes() function call first appeared in FreeBSD 3.0.
BSD June 4, 1993 BSD