| -a |
All subsequent variables that are
defined are automatically exported. |
| -b |
Causes the shell to notify the user asynchronously of background job
completions. The following message will be written to standard error:
"[%d]%c %s%s\n", <job-number>, <current>, <status>, <job-name>
where the fields are as follows:
<current> The character + identifies the job that would be used as a default for the fg or bg
utilities; this job can also be specified using the job_id %+ or %%. The character - identifies the job that would become the default if the
current default job were to exit; this job can also be specified using the job_id %-.
For other jobs, this field is a space character. At most one job can be identified with +
and at most one job can be identified with -. If there is any suspended job, then the
current job will be a suspended job. If there are at least two suspended jobs, then the previous job will also be
a suspended job.
<job-number> A number that can be used to
identify the process group to the wait , fg , bg , and kill utilities. Using these
utilities, the job can be identified by prefixing the job number with %.
<status> Unspecified.
<job-name> Unspecified.
When the shell notifies the user a job has been completed, it may remove the
job's process ID from the list of those known in the current shell execution
environment. Asynchronous notification will not be enabled by default. |
| -C |
-C Prevent existing files from being
overwritten by the shell's > redirection will override this noclobber option for an individual file. |
| -e |
If a command has a non-zero exit status, execute the ERR trap, if set, and exit.
This mode is disabled while reading profiles. |
| -f |
Disables file name generation. |
| -h |
Each command becomes a tracked alias
when first encountered. |
| -k |
All variable assignment arguments are placed in the environment for a command,
not just those that precede the command name. |
| -m |
Background jobs will run in a separate process group and a line will print upon
completion. The exit status of background jobs is reported in a completion message. On systems with job control, this flag is turned on automatically for interactive shells. |
| -n |
Read commands and check them for syntax errors, but do not execute them. Ignored for interactive shells. |
| -o |
The following argument can be one of the following option names:
| allexport |
Same as -a. |
| errexit |
Same as -e. |
| bgnice |
All background jobs are run at a lower priority. This is the
default mode. |
| emacs |
Puts you in an emacs style in-line editor for command entry. |
| gmacs |
Puts you in a gmacs style in-
line editor for command entry. |
| ignoreeof |
The shell will not exit onEOF. The command exit must be
used. |
| keword |
Same as -k. |
| markdirs |
All directory names resulting from file name generation have a trailing / appended. |
| monitor |
Same as -m. |
| noclobber |
Prevents redirection > from truncating existing files.
Require >| to truncate a file when turned on. Equivalent to -C. |
| noexec |
Same as -n. |
| noglob |
Same as -f. |
| nolog |
Do not save function
definitions in history file. |
| notify |
Equivalent to -b. |
| nounset |
Same as -u. |
| privileged |
Same as -p. |
| verbose |
Same as -v. |
| trackall |
Same as -h. |
| vi |
Puts you in insert mode of a vi style in-line editor until you hit escape
character 033. This puts you in control mode. A return sends the line. |
| viraw |
Each character is processed as it is typed in vi mode. |
| xtrace |
Same as -x. |
If no option name is supplied, the current option settings are printed. |
| -p |
Disables processing of the $HOME/.profile file and uses the file
/etc/suid_profile instead of the ENV file. This mode is on whenever the effective uid is not equal to the real
uid, or when the effective gid is not equal to the real gid. Turning this off causes the effective uid and gid to be set to the real uid and gid.
|
| -s |
Sort the positional parameters
lexicographically. |
| -t |
Exit after reading and executing one command. |
| -u |
Treat unset parameters as an error when substituting. |
| -v |
Print shell input lines as they are read. |
| -x |
Print commands and their arguments as they are executed. |
| - |
Turns off -x and -v flags and stops
examining arguments for flags. |
| -- |
Do not change any of the flags; useful in setting $1 to a value beginning with -. If no arguments follow this flag then
the positional parameters are unset.
Using + rather than - causes these flags
to be turned off. These flags can also be used upon invocation of the shell.
The current set of flags may be found in $-. Unless -A is specified, the
remaining arguments are positional parameters and are assigned, in order, to $1 $2 .... If no arguments are given, the names and values of all variables are
printed on the standard output. |
|
|
| +A name |
Array assignment. Unset the variable name and assign values sequentially from
the list arg. If +A is used, the variable name is not unset first. |
| arg |
Additional arguments. |
