UNGET(1P) POSIX Programmer's Manual UNGET(1P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
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NAMEunget - undo a previous get of an SCCS file (DEVELOPMENT)
SYNOPSISunget [-ns][-r SID] file...
DESCRIPTION
The unget utility shall reverse the effect of a get -e done prior to
creating the intended new delta.
OPTIONS
The unget utility shall conform to the Base Definitions volume of
IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
The following options shall be supported:
-r SID
Uniquely identify which delta is no longer intended. (This would
have been specified by get as the new delta.) The use of this
option is necessary only if two or more outstanding get commands
for editing on the same SCCS file were done by the same person
(login name).
-s Suppress the writing to standard output of the intended delta's
SID.
-n Retain the file that was obtained by get, which would normally
be removed from the current directory.
OPERANDS
The following operands shall be supported:
file A pathname of an existing SCCS file or a directory. If file is a
directory, the 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
s.) and unreadable files shall be silently ignored.
If exactly one file operand appears, and it is '-', 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.
STDIN
The standard input shall be a text file used only when the file operand
is specified as '-' . Each line of the text file shall be interpreted
as an SCCS pathname.
INPUT FILES
Any SCCS files processed shall be files of an unspecified format.
ENVIRONMENT VARIABLES
The following environment variables shall affect the execution of
unget:
LANG Provide a default value for the internationalization variables
that are unset or null. (See the Base Definitions volume of
IEEE Std 1003.1-2001, Section 8.2, Internationalization Vari‐
ables for the precedence of internationalization variables used
to determine the values of locale categories.)
LC_ALL If set to a non-empty string value, override the values of all
the other internationalization variables.
LC_CTYPE
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).
LC_MESSAGES
Determine the locale that should be used to affect the format
and contents of diagnostic messages written to standard error.
NLSPATH
Determine the location of message catalogs for the processing of
LC_MESSAGES .
ASYNCHRONOUS EVENTS
Default.
STDOUT
The standard output shall consist of a line for each file, in the fol‐
lowing format:
"%s\n", <SID removed from file>
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 pre‐
ceding lines:
"\n%s:\n", <pathname>
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
Any SCCS files updated shall be files of an unspecified format. During
processing of a file, a locking z-file, as described in get, and a q-
file (a working copy of the p-file), may be created and deleted. The p-
file and g-file, as described in get, shall be deleted.
EXTENDED DESCRIPTION
None.
EXIT STATUS
The following exit values shall be returned:
0 Successful completion.
>0 An error occurred.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
delta, get, sact
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 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 .
IEEE/The Open Group 2003 UNGET(1P)
