Module com.aoapps.lang
Package com.aoapps.lang

Class SysExits

  • public final class SysExits
extends Object
    POSIX-compatible process exit values.

    From /usr/include/sysexits.h: 

      SYSEXITS.H -- Exit status codes for system programs.

  This include file attempts to categorize possible error
  exit statuses for system programs, notably delivermail
  and the Berkeley network.

  Error numbers begin at EX__BASE to reduce the possibility of
  clashing with other exit statuses that random programs may
  already return.  The meaning of the codes is approximately
  as follows:

  EX_USAGE -- The command was used incorrectly, e.g., with
    the wrong number of arguments, a bad flag, a bad
    syntax in a parameter, or whatever.
  EX_DATAERR -- The input data was incorrect in some way.
    This should only be used for user's data & not
    system files.
  EX_NOINPUT -- An input file (not a system file) did not
    exist or was not readable.  This could also include
    errors like "No message" to a mailer (if it cared
    to catch it).
  EX_NOUSER -- The user specified did not exist.  This might
    be used for mail addresses or remote logins.
  EX_NOHOST -- The host specified did not exist.  This is used
    in mail addresses or network requests.
  EX_UNAVAILABLE -- A service is unavailable.  This can occur
    if a support program or file does not exist.  This
    can also be used as a catchall message when something
    you wanted to do doesn't work, but you don't know
    why.
  EX_SOFTWARE -- An internal software error has been detected.
    This should be limited to non-operating system related
    errors as possible.
  EX_OSERR -- An operating system error has been detected.
    This is intended to be used for such things as "cannot
    fork", "cannot create pipe", or the like.  It includes
    things like getuid returning a user that does not
    exist in the passwd file.
  EX_OSFILE -- Some system file (e.g., /etc/passwd, /etc/utmp,
    etc.) does not exist, cannot be opened, or has some
    sort of error (e.g., syntax error).
  EX_CANTCREAT -- A (user specified) output file cannot be
    created.
  EX_IOERR -- An error occurred while doing I/O on some file.
  EX_TEMPFAIL -- temporary failure, indicating something that
    is not really an error.  In sendmail, this means
    that a mailer (e.g.) could not create a connection,
    and the request should be reattempted later.
  EX_PROTOCOL -- the remote system returned something that
    was "not possible" during a protocol exchange.
  EX_NOPERM -- You did not have sufficient permission to
    perform the operation.  This is not intended for
    file system problems, which should use NOINPUT or
    CANTCREAT, but rather for higher level permissions.

    • Method Detail

      • getSysExit

        public static int getSysExit​(Throwable t)
        Gets a sysexit value for common exception types.
        Returns:
        When t is null, returns EX_OK, otherwise returns a non-zero sys exit best matching the given throwable.