Do not set read/write error indicator if ftell cannot get the file mark.

This is not really an IO operation on the file, and accordingly the C standards do not describe the error indicator as being set here. In particular, you cannot get the mark for a character device, but that is expected behavior, not really an error condition. errno is still set, indicating that the ftell operation failed.
2025-02-06 13:30:40 +00:00 · 2022-07-02 22:09:56 -05:00 · 2022-07-02 22:09:56 -05:00 · 2d6ca8a7b2
commit 2d6ca8a7b2
parent 3eb8a9cb55
1 changed files with 2 additions and 2 deletions
--- a/stdio.asm
+++ b/stdio.asm
@ -2008,8 +2008,8 @@ lb0      ldy   #FILE_file               get the file's mark
         sta   gmRefNum
         OSGet_Mark gm
         bcc   lb1
-         ph4   <stream
-         jsr   ~ioerror
+         lda   #EIO
+         sta   >errno
         bra   rts

 lb1      move4 gmPosition,pos           set the position