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GET(P)				    POSIX Programmer's Manual				   GET(P)

NAME
       get - get a version of an SCCS file (DEVELOPMENT)

SYNOPSIS
       get [-begkmnlLpst][-c cutoff][-i list][-r SID][-x list] file...

DESCRIPTION
       The  get  utility  shall  generate  a text file from each named SCCS file according to the
       specifications given by its options.

       The generated text shall normally be written into a file called the g-file whose  name  is
       derived from the SCCS filename by simply removing the leading "s." .

OPTIONS
       The get utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, Sec-
       tion 12.2, Utility Syntax Guidelines.

       The following options shall be supported:

       -r  SID
	      Indicate the SCCS Identification String (SID) of the version  (delta)  of  an  SCCS
	      file  to	be retrieved. The table shows, for the most useful cases, what version of
	      an SCCS file is retrieved (as well as the SID of the version to be eventually  cre-
	      ated by delta if the -e option is also used), as a function of the SID specified.

       -c  cutoff
	      Indicate the cutoff date-time, in the form:

	      YY[MM[DD[HH[MM[SS]]]]]

       For the YY component, values in the range [69,99] shall refer to years 1969 to 1999 inclu-
       sive, and values in the range [00,68] shall refer to years 2000 to 2068 inclusive.

       Note:
	      It is expected that in a future version of IEEE Std 1003.1-2001 the default century
	      inferred from a 2-digit year will change. (This would apply to all commands accept-
	      ing a 2-digit year as input.)

       No changes (deltas) to the SCCS file that were created after the  specified  cutoff  date-
       time  shall  be	included  in  the  generated  text file. Units omitted from the date-time
       default to their maximum possible values;  for  example,  -c  7502  is  equivalent  to  -c
       750228235959.

       Any number of non-numeric characters may separate the various 2-digit pieces of the cutoff
       date-time. This feature allows the  user  to  specify  a  cutoff  date  in  the	form:  -c
       "77/2/2 9:22:25".

       -e     Indicate	that  the get is for the purpose of editing or making a change (delta) to
	      the SCCS file via a subsequent use of delta. The -e option used in a get for a par-
	      ticular  version	(SID)  of  the	SCCS file shall prevent further get commands from
	      editing on the same SID until delta is executed or the j (joint edit) flag  is  set
	      in the SCCS file. Concurrent use of get -e for different SIDs is always allowed.

       If  the	g-file generated by get with a -e option is accidentally ruined in the process of
       editing, it may be regenerated by re-executing the get command with the -k option in place
       of the -e option.

       SCCS  file protection specified via the ceiling, floor, and authorized user list stored in
       the SCCS file shall be enforced when the -e option is used.

       -b     Use with the -e option to indicate that the new delta should have an SID in  a  new
	      branch  as shown in the table below.  This option shall be ignored if the b flag is
	      not present in the file or if the retrieved delta is not	a  leaf  delta.  (A  leaf
	      delta is one that has no successors on the SCCS file tree.)

       Note:
	      A branch delta may always be created from a non-leaf delta.

       -i  list
	      Indicate	a list of deltas to be included (forced to be applied) in the creation of
	      the generated file. The list has the following syntax:

	      <list> ::= <range> | <list> , <range>
	      <range> ::= SID | SID - SID

       SID, the SCCS Identification of a delta, may be in any form shown in the  "SID  Specified"
       column of the table in the EXTENDED DESCRIPTION section, except that the result of supply-
       ing a partial SID is unspecified. A diagnostic message shall be written if the  first  SID
       in the range is not an ancestor of the second SID in the range.

       -x  list
	      Indicate a list of deltas to be excluded (forced not to be applied) in the creation
	      of the generated file. See the -i option for the list format.

       -k     Suppress replacement of identification keywords (see below) in the  retrieved  text
	      by their value. The -k option shall be implied by the -e option.

       -l     Write a delta summary into an l-file.

       -L     Write  a	delta summary to standard output. All informative output that normally is
	      written to standard output shall be written to standard error instead,  unless  the
	      -s option is used, in which case it shall be suppressed.

       -p     Write  the  text	retrieved  from  the SCCS file to the standard output.	No g-file
	      shall be created. All informative output that normally goes to the standard  output
	      shall  go to standard error instead, unless the -s option is used, in which case it
	      shall disappear.

       -s     Suppress all informative output normally	written  to  standard  output.	 However,
	      fatal  error  messages  (which shall always be written to the standard error) shall
	      remain unaffected.

       -m     Precede each text line retrieved from the SCCS file by the SID of  the  delta  that
	      inserted the text line in the SCCS file. The format shall be:

	      "%s\t%s", <SID>, <text line>

       -n     Precede  each  generated	text  line with the %M% identification keyword value (see
	      below). The format shall be:

	      "%s\t%s", <%M% value>, <text line>

       When both the -m and -n options are used, the <text line> shall	be  replaced  by  the  -m
       option-generated format.

       -g     Suppress	the  actual retrieval of text from the SCCS file. It is primarily used to
	      generate an l-file, or to verify the existence of a particular SID.

       -t     Use to access the most recently created (top) delta in a given release  (for  exam-
	      ple, -r 1), or release and level (for example, -r 1.2).

OPERANDS
       The following operands shall be supported:

       file   A pathname of an existing SCCS file or a directory. If file is a directory, the get
	      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 is 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 if the file operand is specified as  '-'
       . Each line of the text file shall be interpreted as an SCCS pathname.

INPUT FILES
       The SCCS files shall be files of an unspecified format.

ENVIRONMENT VARIABLES
       The following environment variables shall affect the execution of get:

       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, Inter-
	      nationalization Variables 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  interna-
	      tionalization 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  argu-
	      ments and input files).

       LC_MESSAGES
	      Determine the locale that should be used to affect the format and contents of diag-
	      nostic messages written to standard error,  and  informative  messages  written  to
	      standard output (or standard error, if the -p option is used).

       NLSPATH
	      Determine the location of message catalogs for the processing of LC_MESSAGES .

       TZ     Determine  the  timezone	in which the times and dates written in the SCCS file are
	      evaluated. If the TZ variable is unset or NULL, an unspecified system default time-
	      zone is used.

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       For each file processed, get shall write to standard output the SID being accessed and the
       number of lines retrieved from the SCCS file, in the following format:

	      "%s\n%d lines\n", <SID>, <number of lines>

       If the -e option is used, the SID of the delta to be  made  shall  appear  after  the  SID
       accessed and before the number of lines generated, in the POSIX locale:

	      "%s\nnew delta %s\n%d lines\n", <SID accessed>,
		  <SID to be made>, <number of lines>

       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 lines shown in one of the preceding formats:

	      "\n%s:\n", <pathname>

       If the -L option is used, a delta summary shall be written following the format	specified
       below for l-files.

       If  the	-i option is used, included deltas shall be listed following the notation, in the
       POSIX locale:

	      "Included:\n"

       If the -x option is used, excluded deltas shall be listed following the notation,  in  the
       POSIX locale:

	      "Excluded:\n"

       If  the	-p  or	-L  options  are specified, the standard output shall consist of the text
       retrieved from the SCCS file.

STDERR
       The standard error shall be used only for diagnostic messages, except  if  the  -p  or  -L
       options are specified, it shall include all informative messages normally sent to standard
       output.

OUTPUT FILES
       Several auxiliary files may be created by get. These files are known generically as the g-
       file,  l-file, p-file, and z-file. The letter before the hyphen is called the tag. An aux-
       iliary filename shall be formed from the SCCS filename: the application shall ensure  that
       the  last  component  of  all SCCS filenames is of the form s.  module-name; the auxiliary
       files shall be named by replacing the leading s with the  tag.  The  g-file  shall  be  an
       exception  to this scheme: the g-file is named by removing the s. prefix. For example, for
       s.xyz.c, the auxiliary filenames would be xyz.c, l.xyz.c, p.xyz.c,  and	z.xyz.c,  respec-
       tively.

       The  g-file,  which contains the generated text, shall be created in the current directory
       (unless the -p option is used). A g-file shall be created in all cases, whether or not any
       lines  of  text	were  generated by the get. It shall be owned by the real user. If the -k
       option is used or implied, the g-file shall be writable by the owner only  (read-only  for
       everyone  else); otherwise, it shall be read-only. Only the real user need have write per-
       mission in the current directory.

       The l-file shall contain a table showing which  deltas  were  applied  in  generating  the
       retrieved  text.  The l-file shall be created in the current directory if the -l option is
       used; it shall be read-only and it is owned by the real user.  Only  the  real  user  need
       have write permission in the current directory.

       Lines in the l-file shall have the following format:

	      "%c%c%c %s\t%s %s\n", <code1>, <code2>, <code3>,
		  <SID>, <date-time>, <login>

       where the entries are:

       <code1>
	      A <space> if the delta was applied; '*' otherwise.

       <code2>
	      A <space> if the delta was applied or was not applied and ignored; '*' if the delta
	      was not applied and was not ignored.

       <code3>
	      A character indicating a special reason why the delta was or was not applied:

       I
	      Included.

       X
	      Excluded.

       C
	      Cut off (by a -c option).

       <date-time>
	      Date and time (using the format of the date utility's %y / %m /  %d  %T  conversion
	      specification format) of creation.

       <login>
	      Login name of person who created delta.

       The  comments  and  MR  data shall follow on subsequent lines, indented one <tab>. A blank
       line shall terminate each entry.

       The p-file shall be used to pass information resulting from a get with a -e  option  along
       to  delta. Its contents shall also be used to prevent a subsequent execution of get with a
       -e option for the same SID until delta is executed or the joint edit flag, j,  is  set  in
       the  SCCS  file. The p-file shall be created in the directory containing the SCCS file and
       the application shall ensure that the effective user has write permission in  that  direc-
       tory.  It  shall  be writable by owner only, and owned by the effective user. Each line in
       the p-file shall have the following format:

	      "%s %s %s %s%s%s\n", <g-file SID>,
		  <SID of new delta>, <login-name of real user>,
		  <date-time>, <i-value>, <x-value>

       where <i-value> uses the format "" if no -i option was specified, and shall use	the  for-
       mat:

	      " -i%s", <-i option option-argument>

       if  a  -i option was specified and <x-value> uses the format "" if no -x option was speci-
       fied, and shall use the format:

	      " -x%s", <-x option option-argument>

       if a -x option was specified. There can be an arbitrary number of lines in the  p-file  at
       any time; no two lines shall have the same new delta SID.

       The  z-file shall serve as a lock-out mechanism against simultaneous updates. Its contents
       shall be the binary process ID of the command (that is, get) that created it.  The  z-file
       shall  be  created  in the directory containing the SCCS file for the duration of get. The
       same protection restrictions as those for the p-file shall apply for the z-file.   The  z-
       file shall be created read-only.

EXTENDED DESCRIPTION
			      Determination of SCCS Identification String
		 SID*	   -b Keyletter Other		       SID	 SID of Delta
		 Specified Used&	Conditions	       Retrieved to be Created
		 none&&    no		R defaults to mR       mR.mL	 mR.(mL+1)
		 none&&    yes		R defaults to mR       mR.mL	 mR.mL.(mB+1).1
		 R	   no		R > mR		       mR.mL	 R.1***

		 R	   no		R = mR		       mR.mL	 mR.(mL+1)
		 R	   yes		R > mR		       mR.mL	 mR.mL.(mB+1).1
		 R	   yes		R = mR		       mR.mL	 mR.mL.(mB+1).1
		 R	   -		R < mR and R does not  hR.mL**	 hR.mL.(mB+1).1
					exist
		 R	   -		Trunk successor in     R.mL	 R.mL.(mB+1).1
					release > R and R
					exists
		 R.L	   no		No trunk successor     R.L	 R.(L+1)
		 R.L	   yes		No trunk successor     R.L	 R.L.(mB+1).1
		 R.L	   -		Trunk successor in     R.L	 R.L.(mB+1).1
					release >= R
		 R.L.B	   no		No branch successor    R.L.B.mS  R.L.B.(mS+1)
		 R.L.B	   yes		No branch successor    R.L.B.mS  R.L.(mB+1).1
		 R.L.B.S   no		No branch successor    R.L.B.S	 R.L.B.(S+1)
		 R.L.B.S   yes		No branch successor    R.L.B.S	 R.L.(mB+1).1
		 R.L.B.S   -		Branch successor       R.L.B.S	 R.L.(mB+1).1

       *      R,  L, B, and S are the release, level, branch, and sequence components of the SID,
	      respectively; m means maximum. Thus, for example, R.mL  means  "the  maximum  level
	      number within release R''; R.L.(mB+1).1 means "the first sequence number on the new
	      branch (that is, maximum branch number plus one) of level L within release R". Note
	      that if the SID specified is of the form R.L, R.L.B, or R.L.B.S, each of the speci-
	      fied components shall exist.

       **     hR is the highest existing release that is lower than the  specified,  nonexistent,
	      release R.

       ***    This is used to force creation of the first delta in a new release.

       &      The  -b  option is effective only if the b flag is present in the file. An entry of
	      '-' means "irrelevant".

       &&     This case applies if the d (default SID) flag is not present in the file. If the	d
	      flag  is	present in the file, then the SID obtained from the d flag is interpreted
	      as if it had been specified on the command line. Thus, one of the  other	cases  in
	      this table applies.

   System Date and Time
       When a g-file is generated, the creation time of deltas in the SCCS file may be taken into
       account. If any of these times are apparently in the future, the behavior is unspecified.

   Identification Keywords
       Identifying information shall be inserted into the text retrieved from the  SCCS  file  by
       replacing identification keywords with their value wherever they occur. The following key-
       words may be used in the text stored in an SCCS file:

       %M%    Module name: either the value of the m flag in the file, or if absent, the name  of
	      the SCCS file with the leading s. removed.

       %I%    SCCS identification (SID) (%R%.%L% or %R%.%L%.%B%.%S%) of the retrieved text.

       %R%    Release.

       %L%    Level.

       %B%    Branch.

       %S%    Sequence.

       %D%    Current date (YY/MM/DD).

       %H%    Current date (MM/DD/YY).

       %T%    Current time (HH:MM:SS).

       %E%    Date newest applied delta was created (YY/MM/DD).

       %G%    Date newest applied delta was created (MM/DD/YY).

       %U%    Time newest applied delta was created (HH:MM:SS).

       %Y%    Module type: value of the t flag in the SCCS file.

       %F%    SCCS filename.

       %P%    SCCS absolute pathname.

       %Q%    The value of the q flag in the file.

       %C%    Current  line  number.  This keyword is intended for identifying messages output by
	      the program, such as "this should  not  have  happened"  type  errors.  It  is  not
	      intended to be used on every line to provide sequence numbers.

       %Z%    The four-character string "@(#)" recognizable by what.

       %W%    A shorthand notation for constructing what strings:

	      %W%=%Z%%M%<tab>%I%

       %A%    Another shorthand notation for constructing what strings:

	      %A%=%Z%%Y%%M%%I%%Z%

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
       Problems  can  arise if the system date and time have been modified (for example, put for-
       ward and then back again, or unsynchronized clocks across a network) and  can  also  arise
       when different values of the TZ environment variable are used.

       Problems  of a similar nature can also arise for the operation of the delta utility, which
       compares the previous file body against the working file as part of its normal operation.

EXAMPLES
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       The -lp option may be withdrawn in a future version.

SEE ALSO
       admin , delta , prs , what

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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					   GET(P)
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