Originální popis anglicky:
utimes - set file access and modification times (
LEGACY)
Návod, kniha: POSIX Programmer's Manual
#include <sys/time.h>
int utimes(const char *
path, const struct
timeval times[2]);
The
utimes() function shall set the access and modification times of the
file pointed to by the
path argument to the value of the
times
argument. The
utimes() function allows time specifications accurate to
the microsecond.
For
utimes(), 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 shall be set to the current time. The effective user ID of
the process shall match the owner of the file, or has write access to the file
or appropriate privileges to use this call in this manner. Upon completion,
utimes() shall mark the time of the last file status change,
st_ctime, for update.
Upon successful completion, 0 shall be returned. Otherwise, -1 shall be returned
and
errno shall be set to indicate the error, and the file times shall
not be affected.
The
utimes() function shall fail if:
- EACCES
- 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.
- ELOOP
- A loop exists in symbolic links encountered during
resolution of the path argument.
- ENAMETOOLONG
- The length of the path argument exceeds {PATH_MAX}
or a pathname component is longer than {NAME_MAX}.
- ENOENT
- A component of path does not name an existing file
or path is an empty string.
- ENOTDIR
- A component of the path prefix is not a directory.
- EPERM
- The times argument is not a null pointer and the
calling process' effective user ID has write access to the file but does
not match the owner of the file and the calling process does not have the
appropriate privileges.
- EROFS
- The file system containing the file is read-only.
The
utimes() function may fail if:
- ELOOP
- More than {SYMLOOP_MAX} symbolic links were encountered
during resolution of the path argument.
- ENAMETOOLONG
- Pathname resolution of a symbolic link produced an
intermediate result whose length exceeds {PATH_MAX}.
The following sections are informative.
None.
For applications portability, the
utime() function should be used to set
file access and modification times instead of
utimes().
None.
This function may be withdrawn in a future version.
utime() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<sys/time.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
