MPE/iX Shell and Utilities Reference Manual, Vol 2

sh(1) MPE/iX Shell and Utilities sh(1)
Message: Unknown option "option"
Cause: When using the set command, you specified an unknown option after the –o
option.
Action: Check the DESCRIPTION section of the set(1) man page for a list of options
that you can specify with –o.
Message: Unknown or missing operator in symbolic mode "mode-
string"
Cause: When using the symbolic mode to indicate new access permissions, you speci-
fied a string modestring which was either missing an operator or contained an
operator that chmod does not recognize.
Action: Make sure that all mode values in symbolic mode contain one of the following
operators: +, -,or=.
Message: unmatched ? :
Cause: You specified the ? operator without the :.
Action: Specify the missing :.
Message: writing: system error
Cause: See syserror(3).
Action: See syserror(3).
PORTABILITY
POSIX
.2. x/OPEN Portability Guide 4.0. Upward compatible with the Bourne Shell on UNIX sys-
tems.
The select and function reserved word commands are from the KornShell. The shell
variables
ERRNO , LINENO , PS3 , PWD , OLDPWD , TMOUT are from the KornShell. Arrays and
subscripted variables are from the KornShell. All the predefined aliases are from the Korn-
Shell. The restricted shell and invocation option –r are from
SVID and the KornShell.
The construct $[arithmetic expression] is an extension to the POSIX standard.
LIMITS
The size of the command argument and exported variables passed between the shell and the
utilities it runs is dependent on the operating system. On MPE/iX, this limit is 8192 bytes and
includes both the command line arguments and the environment being passed.
The maximum length of an executable file name, including subdirectories and extensions, is
dependent on the operating system.
1-554 Commands and Utilities