id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
396	psFitsAlloc() needs a second mode argument (r/w/a)	rhl@…	eugene	"The current definition of psFItsAlloc doesn't specify if the file should be opened for read or write.
Additionally, if the file can be opened for append, we have a way to create multi-extension FITS
files when desireable.

If a non-existent file is opened for read the psFitsAlloc() call doesn't fail, but instead creates
a 2880-byte file; a later attempt to psFitsReadImage() the file fails as the file contains no
data (but we shouldn't get that far)

I propose that the prototype be changed to:
    psFits *psFitsAlloc(const char *name, const char *mode);
where mode can be ""r"", ""w"", or ""a"" (by analogy to fopen)

The function should return NULL if it is unable to open the file in the desired mode."	defect	closed	high		IPP SDRS	unspecified	normal	fixed