System Calls utimes(2)
NAME
utimes, futimesat - set file access and modification times
SYNOPSIS
#include
int utimes(const char *path, const struct timeval times[2]);
int futimesat(int fildes, const char *path, const struct timeval times[2]);
DESCRIPTION
The utimes() function sets the access and modification times
of the file pointed to by the path argument to the value of
the times argument. It allows time specifications accurate
to the microsecond.
The futimesat() function also sets access and modification
times. See fsattr(5). If path is a relative path name, how-
ever, futimesat() resolves the path relative to the fildes
argument rather than the current working directory. If
fildes is set to ATFDCWD, defined in , futimesat()
resolves the path relative to the current working directory.
If path is a null pointer, futimesat() sets the access and
modification times on the file referenced by fildes. The
fildes argument is ignored even when futimesat() is provided
with an absolute path.
The times argument is an array of timeval structures. The
first array member represents the date and time of last
access, and the second member represents the date and time
of last modification. The times in the timeval structure
are measured in seconds and microseconds since the Epoch,
although rounding toward the nearest second may occur.
If the times argument is a null pointer, the access and
modification times of the file are set to the current time.
The effective user ID of the process must be the same as the
owner of the file, or must have write access to the file or
the {PRIVFILEOWNER} privilege to use this call in this
manner. Upon completion, utimes() will mark the time of the
last file status change, stctime, for update.
RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, -1 is
returned, errno is set to indicate the error, and the file
times will not be affected.
SunOS 5.11 Last change: 19 Apr 2004 1
System Calls utimes(2)
ERORS
The utimes() and futimesat() functions will fail if:
EACES Search permission is denied by a component
of the path prefix; or the times argument is
a null pointer and the effective user ID of
the process does not match the owner of the
file and write access is denied.
EFAULT The path or times argument points to an
illegal address. For futimesat(), path might
have the value NUL if the fildes argument
refers to a valid open file descriptor.
EINTR A signal was caught during the execution of
the utimes() function.
EINVAL The number of microseconds specified in one
or both of the timeval structures pointed to
by times was greater than or equal to
1,000,000 or less than 0.
EIO An I/O error occurred while reading from or
writing to the file system.
ELOP Too many symbolic links were encountered in
resolving path.
ENAMETOLONG The length of the path argument exceeds
{PATHMAX} or a pathname component is longer
than {NAMEMAX}.
ENOLINK The path argument points to a remote machine
and the link to that machine is no longer
active.
ENOENT A component of path does not name an exist-
ing file or path is an empty string.
ENOTDIR A component of the path prefix is not a
directory or the path argument is relative
and the fildes argument is not ATFDCWD or
does not refer to a valid directory.
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System Calls utimes(2)
EPERM The times argument is not a null pointer and
the calling process's effective user ID has
write access to the file but does not match
the owner of the file and the calling pro-
cess does not have the appropriate
privileges.
EROFS The file system containing the file is
read-only.
The utimes() and futimesat() functions may fail if:
ENAMETOLONG Path name resolution of a symbolic link pro-
duced an intermediate result whose length
exceeds {PATHMAX}.
ATRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
ATRIBUTE TYPE ATRIBUTE VALUE
Interface Stability utimes() is Standard; fun-
timesat() is Evolving
SEE ALSO
stat(2), utime(2), attributes(5), fsattr(5)
SunOS 5.11 Last change: 19 Apr 2004 3
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