mirror of https://github.com/mkerrisk/man-pages
175 lines
4.9 KiB
Groff
175 lines
4.9 KiB
Groff
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "UNGET" 1P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" unget
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.SH NAME
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unget \- undo a previous get of an SCCS file (\fBDEVELOPMENT\fP)
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.SH SYNOPSIS
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.LP
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\fBunget\fP \fB[\fP\fB-ns\fP\fB][\fP\fB-r\fP \fISID\fP\fB]\fP \fIfile\fP\fB...
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\fP
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.SH DESCRIPTION
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.LP
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The \fIunget\fP utility shall reverse the effect of a \fIget\fP \fB-e\fP
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done prior to
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creating the intended new delta.
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.SH OPTIONS
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.LP
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The \fIunget\fP utility shall conform to the Base Definitions volume
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of IEEE\ Std\ 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
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.LP
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The following options shall be supported:
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.TP 7
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\fB-r\ \fP \fISID\fP
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Uniquely identify which delta is no longer intended. (This would have
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been specified by \fIget\fP as the new delta.) The use of this option
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is necessary only if two or more outstanding \fIget\fP commands for
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editing on the same SCCS file were done by the same person (login
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name).
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.TP 7
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\fB-s\fP
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Suppress the writing to standard output of the intended delta's SID.
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.TP 7
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\fB-n\fP
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Retain the file that was obtained by \fIget\fP, which would normally
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be removed from the
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current directory.
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.sp
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.SH OPERANDS
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.LP
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The following operands shall be supported:
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.TP 7
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\fIfile\fP
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A pathname of an existing SCCS file or a directory. If \fIfile\fP
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is a directory, the \fIunget\fP utility shall behave as
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though each file in the directory were specified as a named file,
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except that non-SCCS files (last component of the pathname does
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not begin with \fBs.\fP) and unreadable files shall be silently ignored.
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.LP
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If exactly one \fIfile\fP operand appears, and it is \fB'-'\fP , the
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standard input shall be read; each line of the standard
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input shall be taken to be the name of an SCCS file to be processed.
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Non-SCCS files and unreadable files shall be silently
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ignored.
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.sp
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.SH STDIN
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.LP
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The standard input shall be a text file used only when the \fIfile\fP
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operand is specified as \fB'-'\fP . Each line of the
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text file shall be interpreted as an SCCS pathname.
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.SH INPUT FILES
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.LP
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Any SCCS files processed shall be files of an unspecified format.
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.SH ENVIRONMENT VARIABLES
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.LP
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The following environment variables shall affect the execution of
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\fIunget\fP:
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.TP 7
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\fILANG\fP
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Provide a default value for the internationalization variables that
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are unset or null. (See the Base Definitions volume of
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IEEE\ Std\ 1003.1-2001, Section 8.2, Internationalization Variables
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for
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the precedence of internationalization variables used to determine
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the values of locale categories.)
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.TP 7
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\fILC_ALL\fP
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If set to a non-empty string value, override the values of all the
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other internationalization variables.
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.TP 7
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\fILC_CTYPE\fP
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Determine the locale for the interpretation of sequences of bytes
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of text data as characters (for example, single-byte as
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opposed to multi-byte characters in arguments and input files).
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.TP 7
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\fILC_MESSAGES\fP
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Determine the locale that should be used to affect the format and
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contents of diagnostic messages written to standard
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error.
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.TP 7
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\fINLSPATH\fP
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Determine the location of message catalogs for the processing of \fILC_MESSAGES
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\&.\fP
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.sp
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.SH ASYNCHRONOUS EVENTS
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.LP
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Default.
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.SH STDOUT
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.LP
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The standard output shall consist of a line for each file, in the
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following format:
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.sp
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.RS
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.nf
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\fB"%s\\n", <\fP\fISID removed from file\fP\fB>
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\fP
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.fi
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.RE
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.LP
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If there is more than one named file or if a directory or standard
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input is named, each pathname shall be written before each of
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the preceding lines:
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.sp
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.RS
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.nf
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\fB"\\n%s:\\n", <\fP\fIpathname\fP\fB>
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\fP
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.fi
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.RE
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.SH STDERR
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.LP
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The standard error shall be used only for diagnostic messages.
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.SH OUTPUT FILES
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.LP
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Any SCCS files updated shall be files of an unspecified format. During
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processing of a \fIfile\fP, a locking \fIz-file\fP, as
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described in \fIget\fP, and a \fIq-file\fP (a working copy of the
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\fIp-file\fP), may be
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created and deleted. The \fIp-file\fP and \fIg-file\fP, as described
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in \fIget\fP, shall be
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deleted.
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.SH EXTENDED DESCRIPTION
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.LP
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None.
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.SH EXIT STATUS
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.LP
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The following exit values shall be returned:
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.TP 7
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\ 0
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Successful completion.
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.TP 7
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>0
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An error occurred.
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.sp
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.SH CONSEQUENCES OF ERRORS
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.LP
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Default.
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.LP
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\fIThe following sections are informative.\fP
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.SH APPLICATION USAGE
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.LP
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None.
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.SH EXAMPLES
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.LP
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None.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fIdelta\fP , \fIget\fP , \fIsact\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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