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

Sponsored Content

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

View Public Profile for bminear

Find all posts by bminear

7 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Strange IP traffic behavior when using Samba and FTP (Windows/Mac to Linux)

I have set up a samba share on my Linux server. I have a gigabit switch, gigabit NICs in each machine. I have set up the /etc/samba/smb.conf to support no delay, 8192 send/receive buffers, etc. This helped the rate for Samba go from about 4MB/S to about 10MB/S, but I expect to see about...

2. AIX

Cannot access NFS file system

I create a NFS file system. I can read this system from client, however, I cannot write anything in this folder. Why?

3. Shell Programming and Scripting

Behavior of Bad Script in Cron Job

Hi A Ksh script is deployed in a server and executed through cronjob. If one of the line in the middle of the script fails . Are the remaining lines executed ?

4. Red Hat

NFS Access Issue

Hi, I am facing issue on NFS. I have shared /data file file system on Server 192.192.192.1, added below lines in /etc/exports /data 192.192.192.2(rw,no_root_squash,sync) the owner of /data directory was test(uid 500) and same I have mounted on another server 192.192.192.2 where the...

5. Shell Programming and Scripting

grep startup messages from catalina.out file

Hello Team, I am trying to extract date from the following output and trying to compare with current date and if there is 10 minute difference between the two. it should logs message in the file server is started.can anyone help me to implement this in the script?

6. UNIX for Advanced & Expert Users

Different redirection behavior in BASH/Linux when run under cron vice login ???

run_xfs_fsr is a xfs filesystem maintenance script designed to run under cron. The system is a home theater personal computer running mythbuntu 10.10, and is accessed remotely for these tests. cron runs a script, (xfs_fsr.sh) at 02:30 that runs the subject script under BASH and sets the...

7. UNIX for Dummies Questions & Answers

Launchd-owned processes unexpected behavior

Ok, so I have been struggling with this for a few days and I think I need an explanation of a few things before I go any further. I'm not sure it's possible to do what I'm trying, so before I pull my hair out, here is what I'm doing: I have written a program in LiveCode that sits on our...

LEARN ABOUT OPENSOLARIS

dfmounts_nfs

dfmounts_nfs(1M)					  System Administration Commands					  dfmounts_nfs(1M)

NAME

       dfmounts_nfs - display mounted NFS resource information

SYNOPSIS

       dfmounts [-F nfs] [-h] [server]...

DESCRIPTION

       dfmounts  shows	the local resources shared through  NFS, along with the list of clients that have mounted the resource. The -F flag may be
       omitted if  NFS is the only file system type listed in the file	/etc/dfs/fstypes.

       dfmounts without options, displays all remote resources mounted on the local system, regardless of file system type.

       The output of dfmounts consists of an optional header line (suppressed with the -h flag) followed by a list of lines containing whitespace-
       separated fields.  For each resource, the fields are:

	 resource server pathname clients ...

       where

       resource    Does not apply to  NFS. Printed as a hyphen (-).

       server	   Specifies the system from which the resource was mounted.

       pathname    Specifies the pathname that must be given to the share(1M) command.

       clients	   Is a comma-separated list of systems that have mounted the resource.

OPTIONS

       -F nfs	 Specifies the nfs-FSType.

       -h	 Suppress header line in output.

       server	 Displays  information	about the resources mounted from each server, where server can be any system on the network.  If no server
		 is specified, the server is assumed to be the local system.

FILES

       /etc/dfs/fstypes

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWnfscu 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mount(1M), share(1M), unshare(1M), attributes(5)

SunOS 5.11							    6 Nov 2000							  dfmounts_nfs(1M)