utime.2

来自「Unix操作系统minix 2.0源码」· 2 代码 · 共 86 行

.\" Copyright (c) 1980 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)utimes.2	6.4 (Berkeley) 8/26/85
.\"
.TH UTIME 2 "August 26, 1985"
.UC 4
.SH NAME
utime \- set file times
.SH SYNOPSIS
.nf
.ft B
#include <sys/types.h>
#include <utime.h>

int utime(const char *\fIfile\fP, struct utimbuf *\fItimes\fP)
.fi
.SH DESCRIPTION
The
.B utime
call
uses the
\*(lqaccessed\*(rq and \*(lqupdated\*(rq times
from the utimbuf structure pointed to by
.I times
to set the corresponding recorded times for
.I file.
.PP
Struct utimbuf is defined in <utime.h> as follows:
.PP
.RS
.nf
.ta +0.4i +0.8i +1.0i
struct utimbuf {
	time_t	actime;	/* access time */
	time_t	modtime;	/* modification time */
};
.fi
.RE
.PP
The caller must be the owner of the file or the super-user.
The \*(lqinode-changed\*(rq time of the file is set to the current time.
.SH "RETURN VALUE
Upon successful completion, a value of 0 is returned.
Otherwise, a value of \-1 is returned and
.B errno
is set to indicate the error.
.SH "ERRORS
.B Utime
will fail if one or more of the following are true:
.TP 15
[ENOTDIR]
A component of the path prefix is not a directory.
.TP 15
[EINVAL]
The pathname contains a character with the high-order bit set.
.TP 15
[ENAMETOOLONG]
The path name exceeds PATH_MAX characters.
.TP 15
[ENOENT]
The named file does not exist.
.TP 15
[ELOOP]
Too many symbolic links were encountered in translating the pathname.
(Minix-vmd)
.TP 15
[EPERM]
The process is not super-user and not the owner of the file.
.TP 15
[EACCES]
Search permission is denied for a component of the path prefix.
.TP 15
[EROFS]
The file system containing the file is mounted read-only.
.TP 15
[EFAULT]
.I File
or \fItimes\fP points outside the process's allocated address space.
.TP 15
[EIO]
An I/O error occurred while reading or writing the affected inode.
.SH SEE ALSO
.BR stat (2).