Re: kern/57145: gmake: *** INTERNAL: readdir: Operation not supported. Stop.

[Andrew Cagney <andrew.cagney%gmail.com@localhost>]

The following reply was made to PR kern/57145; it has been noted by GNATS.

From: Andrew Cagney <andrew.cagney%gmail.com@localhost>
To: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
	gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/57145: gmake: *** INTERNAL: readdir: Operation not
 supported. Stop.
Date: Thu, 29 Dec 2022 11:11:31 -0500

 The code is doing:
 
     open(".")
     lseek(here) -> fails with not supported; should succeed
     read(...)
     lseek(here) -> fails with not supported; should fail with invalid
 
 bad:
 
   1371   1371 gmake    CALL  __stat50(0x499426,0xbfb07448)
   1371   1371 gmake    NAMI  "."
   1371   1371 gmake    RET   __stat50 0
   1371   1371 gmake    CALL  open(0x499426,0x600004,0xf0)
   1371   1371 gmake    NAMI  "."
   1371   1371 gmake    RET   open 3
   1371   1371 gmake    CALL  __fstatvfs190(3,0xbfb066c0,2)
   1371   1371 gmake    RET   __fstatvfs190 0
   1371   1371 gmake    CALL  lseek(3,0,0,0,1)
   1371   1371 gmake    RET   lseek -1 errno 45 Operation not supported
   1371   1371 gmake    CALL  __getdents30(3,0xbaa98000,0x1000)
   1371   1371 gmake    GIO   fd 3 read 2048 bytes
        ....
   1371   1371 gmake    RET   __getdents30 2048/0x800
   1371   1371 gmake    CALL  lseek(3,0,0,0,1)
   1371   1371 gmake    RET   lseek -1 errno 45 Operation not supported
   1371   1371 gmake    CALL  __getdents30(3,0xbaa98000,0x1000)
   1371   1371 gmake    GIO   fd 3 read 0 bytes
        ""
   1371   1371 gmake    RET   __getdents30 0
 
 Good:
 
   1487   1487 gmake    CALL  __stat50(0xf7a426,0xbfb9d0dc)
   1487   1487 gmake    NAMI  "."
   1487   1487 gmake    RET   __stat50 0
   1487   1487 gmake    CALL  open(0xf7a426,0x600004,0xf0)
   1487   1487 gmake    NAMI  "."
   1487   1487 gmake    RET   open 3
   1487   1487 gmake    CALL  __fstatvfs190(3,0xbfb9c354,2)
   1487   1487 gmake    RET   __fstatvfs190 0
   1487   1487 gmake    CALL  lseek(3,0,0,0,1)
   1487   1487 gmake    RET   lseek 0
   1487   1487 gmake    CALL  __getdents30(3,0xbb185000,0x1000)
   1487   1487 gmake    GIO   fd 3 read 2048 bytes
    ...
   1487   1487 gmake    RET   __getdents30 2048/0x800
   1487   1487 gmake    CALL  lseek(3,0,0,0,1)
   1487   1487 gmake    RET   lseek -1 errno 22 Invalid argument
   1487   1487 gmake    CALL  __getdents30(3,0xbb185800,0x800)
   1487   1487 gmake    GIO   fd 3 read 0 bytes
        ""
   1487   1487 gmake    RET   __getdents30 0
   1487   1487 gmake    CALL  close(3)