Template for file name, as in g_mkstemp(), basename only, or NULL for a default template. [type filename][allow-none]
location to store actual name used, or NULL. out[type filename]
A file handle (as from open()) to the file opened for reading and writing. The file is opened in binary mode on platforms where there is a difference. The file handle should be closed with close(). In case of errors, -1 is returned and error will be set.
GException on failure.
Opens a file for writing in the preferred directory for temporary files (as returned by g_get_tmp_dir()). tmpl should be a string in the GLib file name encoding containing a sequence of six 'X' characters, as the parameter to g_mkstemp(). However, unlike these functions, the template should only be a basename, no directory components are allowed. If template is NULL, a default template is used. Note that in contrast to g_mkstemp() (and mkstemp()) tmpl is not modified, and might thus be a read-only literal string. Upon success, and if name_used is non-NULL, the actual name used is returned in name_used. This string should be freed with g_free() when not needed any longer. The returned name is in the GLib file name encoding.