When will fopen fail?

[John Gordon]

markh at csd4.csd.uwm.edu (Mark William Hopkins) writes:


>   Assuming all the subdirectories are there and writeable (on UNIX or
>MS-DOS), when does

>		     FP = fopen("...", "w");

>fail and return FP == NULL?

	Well, it could fail if the process has reached the limit of
simultaneous open files.  Or if the filename is not valid.  Or if the
filename is actually a device.

---
John Gordon
Internet: gordon at osiris.cso.uiuc.edu        #include <disclaimer.h>
          gordon at cerl.cecer.army.mil       #include <clever_saying.h>