unget.1p (5545B)
- '\" et
- .TH UNGET "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
- unget
- \(em undo a previous get of an SCCS file (\fBDEVELOPMENT\fP)
- .SH SYNOPSIS
- .LP
- .nf
- unget \fB[\fR-ns\fB] [\fR-r \fISID\fB] \fIfile\fR...
- .fi
- .SH DESCRIPTION
- The
- .IR unget
- utility shall reverse the effect of a
- .IR get
- .BR \-e
- done prior to creating the intended new delta.
- .SH OPTIONS
- The
- .IR unget
- utility shall conform to the Base Definitions volume of POSIX.1\(hy2017,
- .IR "Section 12.2" ", " "Utility Syntax Guidelines".
- .P
- The following options shall be supported:
- .IP "\fB\-r\ \fISID\fR" 10
- Uniquely identify which delta is no longer intended. (This would have
- been specified by
- .IR get
- as the new delta.) The use of this option is necessary only if two or
- more outstanding
- .IR get
- commands for editing on the same SCCS file were done by the same person
- (login name).
- .IP "\fB\-s\fP" 10
- Suppress the writing to standard output of the intended delta's SID.
- .IP "\fB\-n\fP" 10
- Retain the file that was obtained by
- .IR get ,
- which would normally be removed from the current directory.
- .SH OPERANDS
- The following operands shall be supported:
- .IP "\fIfile\fR" 10
- A pathname of an existing SCCS file or a directory. If
- .IR file
- is a directory, the
- .IR unget
- utility shall behave as though each file in the directory were specified as a named
- file, except that non-SCCS files (last component of the pathname does
- not begin with
- .BR s. )
- and unreadable files shall be silently ignored.
- .RS 10
- .P
- If exactly one
- .IR file
- operand appears, and it is
- .BR '\-' ,
- the standard input shall be read; each line of the standard input shall
- be taken to be the name of an SCCS file to be processed. Non-SCCS files
- and unreadable files shall be silently ignored.
- .RE
- .SH STDIN
- The standard input shall be a text file used only when the
- .IR file
- operand is specified as
- .BR '\-' .
- Each line of the text file shall be interpreted as an SCCS pathname.
- .SH "INPUT FILES"
- Any SCCS files processed shall be files of an unspecified format.
- .SH "ENVIRONMENT VARIABLES"
- The following environment variables shall affect the execution of
- .IR unget :
- .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 and input files).
- .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 standard output shall consist of a line for each file, in the
- following format:
- .sp
- .RS 4
- .nf
- "%s\en", <\fISID removed from file\fR>
- .fi
- .P
- .RE
- .P
- If there is more than one named file or if a directory or standard
- input is named, each pathname shall be written before each of the
- preceding lines:
- .sp
- .RS 4
- .nf
- "\en%s:\en", <\fIpathname\fR>
- .fi
- .P
- .RE
- .SH STDERR
- The standard error shall be used only for diagnostic messages.
- .SH "OUTPUT FILES"
- Any SCCS files updated shall be files of an unspecified format.
- During processing of a
- .IR file ,
- a locking
- .IR z-file ,
- as described in
- .IR get ,
- and a
- .IR q-file
- (a working copy of the
- .IR p-file ),
- may be created and deleted. The
- .IR p-file
- and
- .IR g-file ,
- as described in
- .IR get ,
- shall be deleted.
- .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"
- Default.
- .LP
- .IR "The following sections are informative."
- .SH "APPLICATION USAGE"
- None.
- .SH EXAMPLES
- None.
- .SH RATIONALE
- None.
- .SH "FUTURE DIRECTIONS"
- None.
- .SH "SEE ALSO"
- .IR "\fIdelta\fR\^",
- .IR "\fIget\fR\^",
- .IR "\fIsact\fR\^"
- .P
- The Base Definitions volume of POSIX.1\(hy2017,
- .IR "Chapter 8" ", " "Environment Variables",
- .IR "Section 12.2" ", " "Utility Syntax Guidelines"
- .\"
- .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 .