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(WIP Answer)

Thanks to muru's answer for the kickstart.

Using the information in /proc/[pid]/fdinfo/[fd#]:

• Get mountpoint pathname and device using mnt_id as an index into /proc/[pid]/mountinfo or possibly use a global mountinfo
• Convert ino to decimal
• Lookup pathnames from inode:
• btrfs (requires pathname)
• ext4 (requires device, possibly via https://unix.stackexchange.com/q/387086/143394 )

Possibly lsof: list only files of a particular type with a_inode.

(WIP Answer)

Thanks to muru's answer for the kickstart.

Using the information in /proc/[pid]/fdinfo/[fd#]:

• Get mountpoint pathname and device using mnt_id as an index into /proc/[pid]/mountinfo or possibly use a global mountinfo
• Convert ino to decimal
• Lookup pathnames from inode:
• btrfs (requires pathname)
• ext4 (requires device, possibly via https://unix.stackexchange.com/q/387086/143394 )

Possibly lsof: list only files of a particular type with a_inode.

Too slow as a shell script with all the greping. Perhaps system call interface to /proc information.

(WIP Answer)

Thanks to muru's answer for the kickstart.

Using the information in /proc/[pid]/fdinfo/[fd#]:

• Get mountpoint pathname and device using mnt_id as an index into /proc/[pid]/mountinfo
• Convert ino to decimal
• Lookup pathnames from inode:
• btrfs (requires pathname)
• ext4 (requires device, possibly via https://unix.stackexchange.com/q/387086/143394 )

Possibly lsof: list only files of a particular type with a_inode.

(WIP Answer)

Thanks to muru's answer for the kickstart.

Using the information in /proc/[pid]/fdinfo/[fd#]:

• Get mountpoint pathname and device using mnt_id as an index into /proc/[pid]/mountinfo or possibly use a global mountinfo
• Convert ino to decimal
• Lookup pathnames from inode:
• btrfs (requires pathname)
• ext4 (requires device, possibly via https://unix.stackexchange.com/q/387086/143394 )

Possibly lsof: list only files of a particular type with a_inode.

(WIP Answer)

Thanks to muru's answer for the kickstart.

Using the information in /proc/[pid]/fdinfo/[fd#]:

• Get mountpoint pathname and device using mnt_id as an index into /proc/[pid]/mountinfo
• Convert ino to decimal
• Lookup pathnames from inode:
• btrfs (requires pathname)
• ext4 (requires device)

Possibly lsof: list only files of a particular type with a_inode.

(WIP Answer)

Thanks to muru's answer for the kickstart.

Using the information in /proc/[pid]/fdinfo/[fd#]:

• Get mountpoint pathname and device using mnt_id as an index into /proc/[pid]/mountinfo
• Convert ino to decimal
• Lookup pathnames from inode:
• btrfs (requires pathname)
• ext4 (requires device, possibly via https://unix.stackexchange.com/q/387086/143394 )

Possibly lsof: list only files of a particular type with a_inode.