fg - Runs jobs in the foreground
fg [job_id...]
Note
The C shell has a built-in version of the fg command. If
you are using the C shell, and want to guarantee that you
are using the command described here, you must specify the
full path /usr/bin/fg. See the csh(1) reference page for
a description of the built-in command.
Interfaces documented on this reference page conform to
industry standards as follows:
fg: XCU5.0
Refer to the standards(5) reference page for more information
about industry standards and associated tags.
None
Specifies the job to be run as a foreground job. If no
job_id operand is given, the job_id for the job that was
most recently suspended, placed in the background or run
as a background job is used. The format of job_id is
described in the Jobs section of the ksh(1) reference
page.
If job control is enabled (see the description of set -m
in the ksh(1) reference page), the fg utility moves a
background job from the current environment into the foreground.
Using fg to place a job into the foreground removes its
process ID from the list of those "known in the current
shell execution environment"; see the Jobs section of the
ksh(1) reference page.
If job control is disabled, the fg utility exits with an
error and no job is placed in the foreground. The fg
utility does not work as expected when it is operating in
its own utility execution environment because that environment
has no applicable jobs to manipulate.
The following exit values are returned: Successful completion.
An error occurred.
ENVIRONMENT VARIABLES [Toc] [Back] The following environment variables affect the execution
of fg: Provides a default value for the internationalization
variables that are unset or null. If LANG is unset or
null, the corresponding value from the default locale is
used. If any of the internationalization variables contain
an invalid setting, the utility behaves as if none of
the variables had been defined. If set to a non-empty
string value, overrides the values of all the other internationalization
variables. Determines the locale for the
interpretation of sequences of bytes of text data as characters
(for example, single-byte as opposed to multibyte
characters in arguments). Determines the locale used to
affect the format and contents of diagnostic messages
written to standard error. Determines the location of
message catalogues for the processing of LC_MESSAGES.
Commands: bg(1), csh(1), jobs(1), kill(1), ksh(1),
sh(1p), wait(1)
Standards: standards(5)
fg(1)
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