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diff --git a/man-pages-posix-2017/man1p/fg.1p b/man-pages-posix-2017/man1p/fg.1p new file mode 100644 index 0000000..2d11a5f --- /dev/null +++ b/man-pages-posix-2017/man1p/fg.1p @@ -0,0 +1,164 @@ +'\" et +.TH FG "1P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" +.SH PROLOG +This manual page is part of the POSIX Programmer's Manual. +The Linux implementation of this interface may differ (consult +the corresponding Linux manual page for details of Linux behavior), +or the interface may not be implemented on Linux. +.\" +.SH NAME +fg +\(em run jobs in the foreground +.SH SYNOPSIS +.LP +.nf +fg \fB[\fIjob_id\fB]\fR +.fi +.SH DESCRIPTION +If job control is enabled (see the description of +.IR set +.BR \-m ), +the +.IR fg +utility shall move a background job from the current environment (see +.IR "Section 2.12" ", " "Shell Execution Environment") +into the foreground. +.P +Using +.IR fg +to place a job into the foreground shall remove its process ID from the +list of those ``known in the current shell execution environment''; see +.IR "Section 2.9.3.1" ", " "Examples". +.SH OPTIONS +None. +.SH OPERANDS +The following operand shall be supported: +.IP "\fIjob_id\fR" 10 +Specify the job to be run as a foreground job. If no +.IR job_id +operand is given, the +.IR job_id +for the job that was most recently suspended, placed in the background, +or run as a background job shall be used. The format of +.IR job_id +is described in the Base Definitions volume of POSIX.1\(hy2017, +.IR "Section 3.204" ", " "Job Control Job ID". +.SH STDIN +Not used. +.SH "INPUT FILES" +None. +.SH "ENVIRONMENT VARIABLES" +The following environment variables shall affect the execution of +.IR fg : +.IP "\fILANG\fP" 10 +Provide a default value for the internationalization variables that are +unset or null. (See the Base Definitions volume of POSIX.1\(hy2017, +.IR "Section 8.2" ", " "Internationalization Variables" +for the precedence of internationalization variables used to determine +the values of locale categories.) +.IP "\fILC_ALL\fP" 10 +If set to a non-empty string value, override the values of all the +other internationalization variables. +.IP "\fILC_CTYPE\fP" 10 +Determine the locale for the interpretation of sequences of bytes of +text data as characters (for example, single-byte as opposed to +multi-byte characters in arguments). +.IP "\fILC_MESSAGES\fP" 10 +.br +Determine the locale that should be used to affect the format and +contents of diagnostic messages written to standard error. +.IP "\fINLSPATH\fP" 10 +Determine the location of message catalogs for the processing of +.IR LC_MESSAGES . +.SH "ASYNCHRONOUS EVENTS" +Default. +.SH STDOUT +The +.IR fg +utility shall write the command line of the job to standard output +in the following format: +.sp +.RS 4 +.nf + +"%s\en", <\fIcommand\fR> +.fi +.P +.RE +.SH STDERR +The standard error shall be used only for diagnostic messages. +.SH "OUTPUT FILES" +None. +.SH "EXTENDED DESCRIPTION" +None. +.SH "EXIT STATUS" +The following exit values shall be returned: +.IP "\00" 6 +Successful completion. +.IP >0 6 +An error occurred. +.SH "CONSEQUENCES OF ERRORS" +If job control is disabled, the +.IR fg +utility shall exit with an error and no job shall be placed in the +foreground. +.LP +.IR "The following sections are informative." +.SH "APPLICATION USAGE" +The +.IR 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. See the APPLICATION USAGE section for +.IR "\fIbg\fR\^". +For this reason, +.IR fg +is generally implemented as a shell regular built-in. +.SH EXAMPLES +None. +.SH RATIONALE +The extensions to the shell specified in this volume of POSIX.1\(hy2017 have mostly been based +on features provided by the KornShell. The job control features +provided by +.IR bg , +.IR fg , +and +.IR jobs +are also based on the KornShell. The standard developers examined the +characteristics of the C shell versions of these utilities and found +that differences exist. Despite widespread use of the C shell, the +KornShell versions were selected for this volume of POSIX.1\(hy2017 to maintain a degree of +uniformity with the rest of the KornShell features selected (such as +the very popular command line editing features). +.SH "FUTURE DIRECTIONS" +None. +.SH "SEE ALSO" +.IR "Section 2.9.3.1" ", " "Examples", +.IR "Section 2.12" ", " "Shell Execution Environment", +.IR "\fIbg\fR\^", +.IR "\fIkill\fR\^", +.IR "\fIjobs\fR\^", +.IR "\fIwait\fR\^" +.P +The Base Definitions volume of POSIX.1\(hy2017, +.IR "Section 3.204" ", " "Job Control Job ID", +.IR "Chapter 8" ", " "Environment Variables" +.\" +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1-2017, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 7, 2018 Edition, +Copyright (C) 2018 by the Institute of +Electrical and Electronics Engineers, Inc and The Open Group. +In the event of any discrepancy between this version and the original IEEE and +The Open Group Standard, the original IEEE and The Open Group Standard +is the referee document. The original Standard can be obtained online at +http://www.opengroup.org/unix/online.html . +.PP +Any typographical or formatting errors that appear +in this page are most likely +to have been introduced during the conversion of the source files to +man page format. To report such errors, see +https://www.kernel.org/doc/man-pages/reporting_bugs.html . |