Sometimes one needs to write data to a file that is only temporary. This is most commonly used when an external program launched from within Octave needs to access data. When Octave exits all temporary files will be deleted, so this step need not be executed manually.
Return the file descriptor fid corresponding to a new temporary file with a unique name created from template.
The last six characters of template must be
these are replaced with a string that makes the filename unique. The file
is then created with mode read/write and permissions that are system
dependent (on GNU/Linux systems, the permissions will be 0600 for versions of
glibc 2.0.7 and later). The file is opened in binary mode and with the
If the optional argument delete is supplied and is true, the file will be deleted automatically when Octave exits.
If successful, fid is a valid file ID, name is the name of the file, and msg is an empty string. Otherwise, fid is -1, name is empty, and msg contains a system-dependent error message.
See also: tempname, tempdir, P_tmpdir, tmpfile, fopen.
Return the file ID corresponding to a new temporary file with a unique name.
The file is opened in binary read/write (
"w+b") mode and will be
deleted automatically when it is closed or when Octave exits.
If successful, fid is a valid file ID and msg is an empty string. Otherwise, fid is -1 and msg contains a system-dependent error message.
See also: tempname, mkstemp, tempdir, P_tmpdir.
Return a unique temporary file name as a string.
If prefix is omitted, a value of
"oct-" is used.
If dir is also omitted, the default directory for temporary files
P_tmpdir) is used. If dir is provided, it must exist,
otherwise the default directory for temporary files is used.
Programming Note: Because the named file is not opened by
it is possible, though relatively unlikely, that it will not be available
by the time your program attempts to open it. If this is a concern,
See also: mkstemp, tempdir, P_tmpdir, tmpfile.
Return the name of the host system’s directory for temporary files.
The directory name is taken first from the environment variable
TMPDIR. If that does not exist the system default returned by
P_tmpdir is used.
See also: P_tmpdir, tempname, mkstemp, tmpfile.
Return the name of the host system’s default directory for temporary files.
Programming Note: The value returned by
P_tmpdir is always the
default location. This value may not agree with that returned from
tempdir if the user has overridden the default with the
See also: tempdir, tempname, mkstemp, tmpfile.