Problems running script from postcpbackup

I have a simple bash script that uses mysqldump to create backups of my databases and keep that last x number. I found it on the web quite some time ago and it works well for me when executed as root from ssh or from cron. I call this script from another, which executes the mysqlbak, then rsync's those and my cPanel backups off-site, and then does some basic database maintenance. Again, this works fine from ssh or cron.

I decided to use postcpbackup to start all this so to minimize the possibility that cpbackup might still be running when the other starts. This seemed like a great solution but I can't make it work. No matter how I call the mysqlbak script from postcpbackup, I get "error 2" from mysqldump (which seems to be "can't find the specified file" but I'm not sure). To be clear, here is the mysqlbak script:

/http://dl.dropbox.com/u/48873/mysqlbak.sh

This, along with other things, is called from another script:

/http://dl.dropbox.com/u/48873/s3backup.sh

All the scripts referenced including those above are located in /root/scripts/. I've tried placing the contents of s3backup.sh in poscpbackup, and just placing a reference to /root/scripts/s3backup.sh in postcpbackup. I even tried calling mysqlbak.sh directly from postcpbackup. In all cases, everything works fine except for mysqlbak.sh and it gives the error described above. And all works fine if run directly from ssh or cron.

What have I missed? Is there a permissions issue? What user does postcpbackup run under? I'm out of ideas and have found precious little concerning either the error or using postcpbackup. Any advice is greatly appreciated.

 

Thanks for the response, Dave. I tried but it appears that mysql is compiled without the debug option and I get nothing. I'm running Centos 6.2, and I'm not sure if cPanel compiles mysql upon install or just pulls it from the repos. Any further suggestions?

Code:

Variables (--variable-name=value)
and boolean options {FALSE|TRUE}  Value (after reading options)
--------------------------------- -----------------------------
all                               TRUE
all-databases                     FALSE
add-drop-database                 FALSE
add-drop-table                    TRUE
add-locks                         TRUE
allow-keywords                    FALSE
character-sets-dir                (No default value)
comments                          TRUE
compatible                        (No default value)
compact                           FALSE
complete-insert                   FALSE
compress                          FALSE
create-options                    TRUE
databases                         FALSE
[COLOR="#FF0000"]debug-info                        FALSE[/COLOR]
default-character-set             utf8
delayed-insert                    FALSE
delete-master-logs                FALSE
disable-keys                      TRUE
extended-insert                   TRUE
fields-terminated-by              (No default value)
fields-enclosed-by                (No default value)
fields-optionally-enclosed-by     (No default value)
fields-escaped-by                 (No default value)
first-slave                       FALSE
flush-logs                        FALSE
flush-privileges                  FALSE
force                             FALSE
hex-blob                          FALSE
host                              (No default value)
insert-ignore                     FALSE
lines-terminated-by               (No default value)
lock-all-tables                   FALSE
lock-tables                       TRUE
log-error                         (No default value)
master-data                       0
max_allowed_packet                16777216
net_buffer_length                 1046528
no-autocommit                     FALSE
no-create-db                      FALSE
no-create-info                    FALSE
no-data                           FALSE
order-by-primary                  FALSE
port                              0
quick                             TRUE
quote-names                       TRUE
routines                          FALSE
set-charset                       TRUE
single-transaction                FALSE
dump-date                         TRUE
socket                            (No default value)
tab                               (No default value)
triggers                          TRUE
tz-utc                            TRUE
user                              root
verbose                           FALSE
where                             (No default value)