# patchrm Exit Codes:
# 0   No error
# 1   Usage error
# 2   Attempt to backout a patch that hasn't been applied
# 3   Effective UID is not root
# 4   No saved files to restore
# 5   pkgrm failed
# 6   Attempt to back out an obsoleted patch
# 7   Attempt to restore CPIO archived files failed
# 8   Invalid patch id format
# 9   Prebackout script failed
# 10  Postbackout script failed
# 11  Suspended due to administrative defaults
# 12  Patchrm could not locate the backout data
# 13  The relative directory supplied can't be found
# 14  Patchadd has been interrupted, re-invoke patchadd
# 15  This patch is required by a patch already installed, can't back it out
# 16  Unable to create safe temporary directory
# 17  Must be running Solaris 2.6 or greater
# 18  Error unable to retrieve patch information from SQL DB.
# 19  Lock file not available
# 20  Insufficient space to uncompress undo.Z files
# 21  Unable to copy pkginfo file to pspool directory