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.