Can't create '\\\\?\\C:\\usr\\bin\\free.exe'

[john-peterson]

I tried to remedy the famous NULL SID with

sed -i -e 's/user/user,noacl,exec/g' /etc/fstab

Now all installations seemingly point to the wrong path. The cygwin prefix is missing. My root is c:/cygwin

wget https://raw.githubusercontent.com/kou1okada/apt-cyg/master/apt-cyg
install apt-cyg /bin

apt-cyg install procps-ng
...
ash_check: sha512sum: procps-ng-4.0.3-1.tar.zst: OK
Unpacking...
x usr/bin/free.exe: Can't create '\\\\?\\C:\\usr\\bin\\free.exe'
x usr/bin/pgrep.exe: Can't create '\\\\?\\C:\\usr\\bin\\pgrep.exe'                                     
x usr/bin/pidof.exe: Can't create '\\\\?\\C:\\usr\\bin\\pidof.exe'
x usr/bin/pkill.exe: Can't create '\\\\?\\C:\\usr\\bin\\pkill.exe'
x usr/bin/pmap.exe: Can't create '\\\\?\\C:\\usr\\bin\\pmap.exe'
...
...
x usr/share/man/uk/man8/vmstat.8.gz: Can't create '\\\\?\\C:\\usr\\share\\man\\uk\\man8\\vmstat.8.gz'     
tar.exe: Error exit delayed from previous errors.    
Package procps-ng requires the following packages, installing:
...

This is no problems

touch /usr/bin/test

dev@win ~
$ ls /cygdrive/c/cygwin/bin/test
/cygdrive/c/cygwin/bin/test

mount
C:/cygwin/bin on /usr/bin type ntfs (binary,auto)
C:/cygwin/lib on /usr/lib type ntfs (binary,auto)
C:/cygwin on / type ntfs (binary,auto)
C: on /cygdrive/c type ntfs (binary,posix=0,user,noumount,auto)

I tried

apt-cyg repair-acl

I believe fstab is restored after this failure maybe it's still wrong??

cat /etc/fstab
# This is default anyway:
none /cygdrive cygdrive binary,posix=0,user 0 0

How do I restore my cygwin prefix to c:/cygwin so it doesn't try to unpack everything in c:/

It already is correct in the registry

C:\Users\dev>reg query HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\setup /v rootdir

HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\setup
    rootdir    REG_SZ    c:\cygwin

Now a different error don't know why

apt-cyg install tree
hash_check: sha512sum: tree-1.7.0-1.tar.xz: OK
Unpacking...

It just hangs at unpacking. Stalls endlessly. Is it the install command that doe something? Should I manually mv chmod?

[kou1okada]

May be your tar command is not cygwin's.
Please check the results of following commands:

type -a tar
declare -p PATH

[kou1okada]

You must place /usr/bin before /cygdrive/c/WINDOWS/system32 at PATH of environment variable.

❌ PATH=/cygdrive/c/WINDOWS/system32:/usr/bin
✔ PATH=/usr/bin:/cygdrive/c/WINDOWS/system32
✔ PATH=/usr/bin