GET(1)GET(1)NAMEget - get a version of an SCCS file
SYNOPSISget [-r SID] [-c cutoff] [-i list] [-x list] [-w string] [-a seq-no.]
[-k] [-e] [-l[p] [-L] [-p] [-m] [-n] [-s] [-b] [-g] [-t] file ...
DESCRIPTIONget generates an ASCII text file from each named SCCS file according to
the specifications given by its keyletter arguments, which begin with -.
The arguments may be specified in any order, but all keyletter arguments
apply to all named SCCS files. If a directory is named, get behaves as
though each file in the directory were specified as a named file, except
that non-SCCS files (last component of the path name does not begin with
s.) and unreadable files are silently ignored. If a name of - is given,
the standard input is read; each line of the standard input is taken to
be the name of an SCCS file to be processed. Again, non-SCCS files and
unreadable files are silently ignored.
The generated text is normally written into a file called the g-file
whose name is derived from the SCCS file name by simply removing the
leading s.; (see also FILES, below).
Each of the keyletter arguments is explained below as though only one
SCCS file is to be processed, but the effects of any keyletter argument
applies independently to each named file.
-rSID The SCCS IDentification string (SID) of the version
(delta) of an SCCS file to be retrieved. Table~1 below
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 created by delta(1) if the -e keyletter is
also used), as a function of the SID specified.
-ccutoff Cutoff date-time, in the form:
YY[MM[DD[HH[MM[SS]]]]]
No changes (deltas) to the SCCS file which were created
after the specified cutoff date-time are included in the
generated ASCII text file. Units omitted from the date-
time default to their maximum possible values; that is,
-c7502 is equivalent to -c750228235959. The values of
00-38 for YY indicate 2000-2038. YY values between 39
and 69 are not permitted. Any number of non-numeric
characters may separate the various 2-digit pieces of the
cutoff date-time. This feature allows one to specify a
cutoff date in the form: "-c77/2/2 9:22:25". Note that
this implies that one may use the %E% and %U%
identification keywords (see below) for nested gets
within, say the input to a send(1C) command:
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~!get "-c%E% %U%" s.file
-ilist 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 Table 1.
-xlist A list of deltas to be excluded in the creation of the
generated file. See the -i keyletter for the list
format.
-e Indicates that the get is for the purpose of editing or
making a change (delta) to the SCCS file via a subsequent
use of delta(1). The -e keyletter used in a get for a
particular version (SID) of the SCCS file prevents
further gets for editing on the same SID until delta is
executed or the j (joint edit) flag is set in the SCCS
file [see admin(1)]. Concurrent use of get-e for
different SIDs is always allowed.
If the g-file generated by get with an -e keyletter is
accidentally ruined in the process of editing it, it may
be regenerated by re-executing the get command with the
-k keyletter in place of the -e keyletter.
SCCS file protection specified via the ceiling, floor,
and authorized user list stored in the SCCS file [see
admin(1)] are enforced when the -e keyletter is used.
-b Used with the -e keyletter to indicate that the new delta
should have an SID in a new branch as shown in Table 1.
This keyletter is ignored if the b flag is not present in
the file [see admin(1)] 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. Partial SIDs are interpreted as shown in the
``SID Retrieved'' column of Table 1.
-k Suppresses replacement of identification keywords (see
below) in the retrieved text by their value. The -k
keyletter is implied by the -e keyletter.
-l[p] Causes a delta summary to be written into an l-file. If
-lp is used then an l-file is not created; the delta
summary is written on the standard output instead. See
FILES for the format of the l-file.
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GET(1)GET(1)-L Equivalent to -lp.
-p Causes the text retrieved from the SCCS file to be
written on the standard output. No g-file is created.
All output which normally goes to the standard output
goes to file descriptor 2 instead, unless the -s
keyletter is used, in which case it disappears.
-s Suppresses all output normally written on the standard
output. However, fatal error messages (which always go
to file descriptor 2) remain unaffected.
-m Causes each text line retrieved from the SCCS file to be
preceded by the SID of the delta that inserted the text
line in the SCCS file. The format is: SID, followed by
a horizontal tab, followed by the text line.
-n Causes each generated text line to be preceded with the
%M% identification keyword value (see below). The format
is: %M% value, followed by a horizontal tab, followed by
the text line. When both the -m and -n keyletters are
used, the format is: %M% value, followed by a horizontal
tab, followed by the -m keyletter generated format.
-g Suppresses 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 Used to access the most recently created delta in a given
release (e.g., -r1), or release and level (e.g., -r1.2).
-w string Substitute string for all occurrences of %W% when getting
the file.
-aseq-no. The delta sequence number of the SCCS file delta
(version) to be retrieved [see sccsfile(5)]. This
keyletter is used by the comb(1) command; it is not a
generally useful keyletter. If both the -r and -a
keyletters are specified, only the -a keyletter is used.
Care should be taken when using the -a keyletter in
conjunction with the -e keyletter, as the SID of the
delta to be created may not be what one expects. The -r
keyletter can be used with the -a and -e keyletters to
control the naming of the SID of the delta to be created.
For each file processed, get responds (on the standard output) with the
SID being accessed and with the number of lines retrieved from the SCCS
file.
If the -e keyletter is used, the SID of the delta to be made appears
after the SID accessed and before the number of lines generated. If
there is more than one named file or if a directory or standard input is
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named, each file name is printed (preceded by a new-line) before it is
processed. If the -i keyletter is used included deltas are listed
following the notation ``Included''; if the -x keyletter is used,
excluded deltas are listed following the notation ``Excluded''.
TABLE 1. 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 < mR and
R - R does not exist hR.mL** hR.mL.(mB+1).1
________________________________________________________________________
Trunk succ.#
in release > R
R - and R exists R.mL R.mL.(mB+1).1
________________________________________________________________________
R.L no No trunk succ. R.L R.(L+1)
________________________________________________________________________
R.L yes No trunk succ. R.L R.L.(mB+1).1
________________________________________________________________________
Trunk succ.
R.L - in release > R R.L R.L.(mB+1).1
________________________________________________________________________
R.L.B no No branch succ. R.L.B.mS R.L.B.(mS+1)
________________________________________________________________________
R.L.B yes No branch succ. R.L.B.mS R.L.(mB+1).1
________________________________________________________________________
R.L.B.S no No branch succ. R.L.B.S R.L.B.(S+1)
________________________________________________________________________
R.L.B.S yes No branch succ. R.L.B.S R.L.(mB+1).1
________________________________________________________________________
R.L.B.S - Branch succ. 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
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maximum level number within release R''; ``R.L.(mB+1).1'' means
``the first sequence number on the new branch (i.e., 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 specified components must 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.
# Successor.
- The -b keyletter is effective only if the b flag [see admin(1)] 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.
IDENTIFICATION KEYWORDS
Identifying information is inserted into the text retrieved from the SCCS
file by replacing identification keywords with their value wherever they
occur. The following keywords may be used in the text stored in an SCCS
file:
Keyword Value
%M% Module name: either the value of the m flag in the file [see
admin(1)], or if absent, the name of the SCCS file with the
leading s. removed.
%I% SCCS identification (SID) (%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 [see
admin(1)].
%F% SCCS file name.
%P% Fully qualified SCCS file name.
%Q% The value of the q flag in the file [see admin(1)].
%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 4-character string @(#) recognizable by what(1).
%W% A shorthand notation for constructing what(1) strings for UNIX
system program files. %W% = %Z%%M%<horizontal-tab>%I%
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%A% Another shorthand notation for constructing what(1) strings for
non-UNIX system program files.
%A% = %Z%%Y% %M% %I%%Z%
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 auxiliary file name is formed from the
SCCS file name: the last component of all SCCS file names must be of the
form s.module-name, the auxiliary files are named by replacing the
leading s with the tag. The g-file is an exception to this scheme: the
g-file is named by removing the s. prefix. For example, s.xyz.c, the
auxiliary file names would be xyz.c, l.xyz.c, p.xyz.c, and z.xyz.c,
respectively.
The g-file, which contains the generated text, is created in the current
directory (unless the -p keyletter is used). A g-file is created in all
cases, whether or not any lines of text were generated by the get. It is
owned by the real user. If the -k keyletter is used or implied its mode
is 644; otherwise its mode is 444. Only the real user need have write
permission in the current directory.
The l-file contains a table showing which deltas were applied in
generating the retrieved text. The l-file is created in the current
directory if the -l keyletter is used; its mode is 444 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 have the following format:
a. A blank character if the delta was applied;
* otherwise.
b. A blank character if the delta was applied or was not applied
and ignored;
* if the delta was not applied and was not ignored.
c. A code indicating a ``special'' reason why the delta was or was
not applied:
``I'': Included.
``X'': Excluded.
``C'': Cut off (by a -c keyletter).
d. Blank.
e. SCCS identification (SID).
f. Tab character.
g. Date and time (in the form YY/MM/DD HH:MM:SS) of creation.
h. Blank.
i. Login name of person who created delta.
The comments and MR data follow on subsequent lines, indented one
horizontal tab character. A blank line terminates each entry.
The p-file is used to pass information resulting from a get with an -e
keyletter along to delta. Its contents are also used to prevent a
subsequent execution of get with an -e keyletter for the same SID until
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delta is executed or the joint edit flag, j, [see admin(1)] is set in the
SCCS file. The p-file is created in the directory containing the SCCS
file and the effective user must have write permission in that directory.
Its mode is 644 and it is owned by the effective user. The format of the
p-file is: the gotten SID, followed by a blank, followed by the SID that
the new delta will have when it is made, followed by a blank, followed by
the login name of the real user, followed by a blank, followed by the
date-time the get was executed, followed by a blank and the -i keyletter
argument if it was present, followed by a blank and the -x keyletter
argument if it was present, followed by a new-line. There can be an
arbitrary number of lines in the p-file at any time; no two lines can
have the same new delta SID.
The z-file serves as a lock-out mechanism against simultaneous updates.
Its contents are the binary (2 bytes) process ID of the command (i.e.,
get) that created it. The z-file is created in the directory containing
the SCCS file for the duration of get. The same protection restrictions
as those for the p-file apply for the z-file. The z-file is created mode
444.
FILES
g-file Existed before the execution of delta; removed after
completion of delta.
p-file Existed before the execution of delta; may exist after
completion of delta.
q-file Created during the execution of delta; removed after
completion of delta.
x-file Created during the execution of delta; renamed to SCCS
file after completion of delta.
z-file Created during the execution of delta; removed during
the execution of delta.
d-file Created during the execution of delta; removed after
completion of delta.
/usr/bin/bdiff Program to compute differences between the ``gotten''
file and the g-file.
SEE ALSOadmin(1), delta(1), help(1), prs(1), what(1)DIAGNOSTICS
Use help(1) for explanations.
BUGS
If the effective user has write permission (either explicitly or
implicitly) in the directory containing the SCCS files, but the real user
does not, then only one file may be named when the -e keyletter is used.
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