failed to close file descriptor 0: bad file descriptor

Issue

• It looks like these errors could be traced back to calls within the scripts where we try to start another script. Small piece of logging:

SITERUN -- START backup-pgsql.zsh: 31-07-2014 14:37:21
[2014-07-31 14:37:21 43112] backup-pgsql.zsh; v2.4: the script is stopped
BACKUP_PGSQL:51: failed to close file descriptor 0: bad file descriptor
[2014-07-31 14:37:21 43112]      Error running disk backup; check disk backup [log | err]. For more information,
BACKUP_PGSQL:116: failed to close file descriptor 0: bad file descriptor
[2014-07-31 14:37:23 43112]      Error running disk backup; check disk backup [log | err]. For more information,
[2014-07-31 14:37:23 43112] backup-pgsql.zsh; v2.4: the script is stopped
SITERUN -- STOP backup-pgsql.zsh: 31-07-2014 14:37:23