Mac OS X Catalina - NFS File Access Behavior in CRON or Launchd Post: 303045424

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Top Forums UNIX for Beginners Questions & Answers Mac OS X Catalina - NFS File Access Behavior in CRON or Launchd Post 303045424 by bminear on Friday 20th of March 2020 10:40:09 AM

03-20-2020

Registered User

Mac OS X Catalina - NFS File Access Behavior in CRON or Launchd

I'm really struggling here, and I think this is a new effect of upgrade to Catalina. I have an automounted NFS directory that contains a file I want to periodically copy to my Mac's local file system. I have a script that does this, and it worked beautifully before Catalina upgrade. If I run the script manually (as root) it's all good. If I run the script as part of a scheduled job it fails. I've tried launching the script in root owned cron job, and I've tried using Launchd. Both fail the same way.

My script:

#!/bin/sh

if [ -f /System/Volumes/Data/nfs/hosts ]
then
cat /etc/hosts.base /System/Volumes/Data/nfs/hosts > /etc/hosts
fi

/System/Volumes/Data/nfs is an NFS share coming off a Synology NAS.

The [ -f ...] part works fine. It can successfully determine if the hosts file exists in the NFS directory. But the cat command fails reading the hosts file. Again, if I run the script manually it all works fine. It only fails if the script is launched from cron or launchd.

File permissions:

brians-mbp:etc root# ls -la /System/Volumes/Data/nfs/hosts
-rwxrwxrwx 1 1024 _lpoperator 2393 Feb 8 14:29 /System/Volumes/Data/nfs/hosts

I've tried fiddling with owner and group, no effect. I've tried different approaches of mounting the NFS drive (automount, fstab, etc), no effect. I've tried different directories, different filenames, etc, no effect. I've tried using different shells in the script (sh, zsh, ...), no effect.

I've tried to find whether Catalina introduced some new ACL mechanisms but can't find anything other than gripes about how Apple changed directory structure in Catalina. But the fact that the script runs just fine if run manually tells me the permissions/ACLs must be ok.

Any ideas?

Brian

bminear

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mount.nfs

MOUNT.NFS(8)                                                  System Manager's Manual                                                 MOUNT.NFS(8)

NAME

       mount.nfs, mount.nfs4 - mount a Network File System

SYNOPSIS

       mount.nfs remotetarget dir [-rvVwfnsh ] [-o options]

DESCRIPTION

       mount.nfs is a part of nfs(5) utilities package, which provides NFS client functionality.

       mount.nfs  is  meant to be used by the mount(8) command for mounting NFS shares. This subcommand, however, can also be used as a standalone
       command with limited functionality.

       remotetarget is a server share usually in the form of servername:/path/to/share.  dir is the directory on which the file system  is  to  be
       mounted.

       Under  Linux  2.6.32  and  later  kernel  versions, mount.nfs can mount all NFS file system versions.  Under earlier Linux kernel versions,
       mount.nfs4 must be used for mounting NFSv4 file systems while mount.nfs must be used for NFSv3 and v2.

OPTIONS

       -r     Mount file system readonly.

       -v     Be verbose.

       -V     Print version.

       -w     Mount file system read-write.

       -f     Fake mount. Don't actually call the mount system call.

       -n     Do not update /etc/mtab.  By default, an entry is created in /etc/mtab for every mounted file system. Use this option to skip making
              an entry.

       -s     Tolerate sloppy mount options rather than fail.

       -h     Print help message.

       nfsoptions
              Refer to nfs(5) or mount(8) manual pages.

NOTE

       For further information please refer nfs(5) and mount(8) manual pages.

FILES

       /etc/fstab        file system table

       /etc/mtab         table of mounted file systems

SEE ALSO

       nfs(5), mount(8),

AUTHOR

       Amit Gud <agud@redhat.com>

                                                                    5 Jun 2006                                                        MOUNT.NFS(8)