Originální popis anglicky:
prs - print an SCCS file (
DEVELOPMENT)
Návod, kniha: POSIX Programmer's Manual
prs [-a][-d
dataspec][-r[SID]]
file...
prs [ -e| -l] -c cutoff
[-d dataspec] file...
prs [ -e| -l]
-r[SID][-d
dataspec]file ...
The
prs utility shall write to standard output parts or all of an SCCS
file in a user-supplied format.
The
prs utility shall conform to the Base Definitions volume of
IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines,
except that the
-r option has an optional option-argument. This
optional option-argument cannot be presented as a separate argument. The
following options shall be supported:
- -d dataspec
- Specify the output data specification. The dataspec
shall be a string consisting of SCCS file data keywords (see
Data Keywords ) interspersed with optional user-supplied text.
- -r[SID]
- Specify the SCCS identification string (SID) of a delta for
which information is desired. If no SID option-argument is
specified, the SID of the most recently created delta shall be
assumed.
- -e
- Request information for all deltas created earlier than and
including the delta designated via the -r option or the date-time
given by the -c option.
- -l
- Request information for all deltas created later than and
including the delta designated via the -r option or the date-time
given by the -c option.
- -c cutoff
- Indicate the cutoff date-time, in the form:
For the
YY component, values in the range [69,99] shall refer to years
1969 to 1999 inclusive, 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 accepting 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 output. Units omitted from
the date-time default to their maximum possible values; for example,
-c 7502 is equivalent to
-c 750228235959.
- -a
- Request writing of information for both removed-that is,
delta type= R (see rmdel )- and existing-that
is, delta type= D,- deltas. If the -a option
is not specified, information for existing deltas only shall be provided.
The following operand shall be supported:
- file
- A pathname of an existing SCCS file or a directory. If
file is a directory, the prs 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.
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.
Any SCCS files displayed are files of an unspecified format.
The following environment variables shall affect the execution of
prs:
- 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
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 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 .
Default.
The standard output shall be a text file whose format is dependent on the data
keywords specified with the
-d option.
Data keywords specify which parts of an SCCS file shall be retrieved and output.
All parts of an SCCS file have an associated data keyword. A data keyword may
appear in a
dataspec multiple times.
The information written by
prs shall consist of:
- 1.
- The user-supplied text
- 2.
- Appropriate values (extracted from the SCCS file)
substituted for the recognized data keywords in the order of appearance in
the dataspec
The format of a data keyword value shall either be simple (
'S' ), in
which keyword substitution is direct, or multi-line (
'M' ).
User-supplied text shall be any text other than recognized data keywords. A
<tab> shall be specified by
'\t' and <newline> by
'\n' . When the
-r option is not specified, the default
dataspec shall be:
and the following
dataspec shall be used for each selected delta:
:Dt:\t:DL:\nMRs:\n:MR:COMMENTS:\n:C:
| SCCS File Data Keywords |
|
|
|
|
| Keyword |
Data Item |
File Section |
Value |
Format |
| :Dt: |
Delta information |
Delta Table |
See below* |
S |
| :DL: |
Delta line statistics |
" |
:Li:/:Ld:/:Lu: |
S |
| :Li: |
Lines inserted by Delta |
" |
nnnnn*** |
S |
| :Ld: |
Lines deleted by Delta |
" |
nnnnn*** |
S |
| :Lu: |
Lines unchanged by Delta |
" |
nnnnn*** |
S |
| :DT: |
Delta type |
" |
D or R |
S |
| :I: |
SCCS ID string (SID) |
" |
See below** |
S |
| :R: |
Release number |
" |
nnnn |
S |
| :L: |
Level number |
" |
nnnn |
S |
| :B: |
Branch number |
" |
nnnn |
S |
| :S: |
Sequence number |
" |
nnnn |
S |
| :D: |
Date delta created |
" |
:Dy:/:Dm:/:Dd: |
S |
| :Dy: |
Year delta created |
" |
nn |
S |
| :Dm: |
Month delta created |
" |
nn |
S |
| :Dd: |
Day delta created |
" |
nn |
S |
| :T: |
Time delta created |
" |
:Th:::Tm:::Ts: |
S |
| :Th: |
Hour delta created |
" |
nn |
S |
| :Tm: |
Minutes delta created |
" |
nn |
S |
| :Ts: |
Seconds delta created |
" |
nn |
S |
| :P: |
Programmer who created Delta |
" |
logname |
S |
| :DS: |
Delta sequence number |
" |
nnnn |
S |
| :DP: |
Predecessor Delta sequence |
" |
nnnn |
S |
| |
number |
|
|
|
| :DI: |
Sequence number of deltas |
" |
:Dn:/:Dx:/:Dg: |
S |
| |
included, excluded, or ignored |
|
|
|
| :Dn: |
Deltas included (sequence #) |
" |
:DS: :DS: ... |
S |
| :Dx: |
Deltas excluded (sequence #) |
" |
:DS: :DS: ... |
S |
| :Dg: |
Deltas ignored (sequence #) |
" |
:DS: :DS: ... |
S |
| :MR: |
MR numbers for delta |
" |
text |
M |
| :C: |
Comments for delta |
" |
text |
M |
| :UN: |
User names |
User Names |
text |
M |
| :FL: |
Flag list |
Flags |
text |
M |
| :Y: |
Module type flag |
" |
text |
S |
| :MF: |
MR validation flag |
" |
yes or no |
S |
| :MP: |
MR validation program name |
" |
text |
S |
| :KF: |
Keyword error, warning flag |
" |
yes or no |
S |
| :KV: |
Keyword validation string |
" |
text |
S |
| :BF: |
Branch flag |
" |
yes or no |
S |
| :J: |
Joint edit flag |
" |
yes or no |
S |
| :LK: |
Locked releases |
" |
:R: ... |
S |
| :Q: |
User-defined keyword |
" |
text |
S |
| :M: |
Module name |
" |
text |
S |
| :FB: |
Floor boundary |
" |
:R: |
S |
| :CB: |
Ceiling boundary |
" |
:R: |
S |
| :Ds: |
Default SID |
" |
:I: |
S |
| :ND: |
Null delta flag |
" |
yes or no |
S |
| :FD: |
File descriptive text |
Comments |
text |
M |
| :BD: |
Body |
Body |
text |
M |
| :GB: |
Gotten body |
" |
text |
M |
| :W: |
A form of what string |
N/A |
:Z::M:\t:I: |
S |
| :A: |
A form of what string |
N/A |
:Z::Y: :M: :I::Z: |
S |
| :Z: |
what string delimiter |
N/A |
@(#) |
S |
| :F: |
SCCS filename |
N/A |
text |
S |
| :PN: |
SCCS file pathname |
N/A |
text |
S |
- *
- :Dt:= :DT: :I: :D: :T: :P: :DS: :DP:
- **
- :R:.:L:.:B:.:S: if the delta is a branch delta (
:BF:== yes)
:R:.:L: if the delta is not a branch delta ( :BF:==
no)
- ***
- The line statistics are capped at 99999. For example, if
100000 lines were unchanged in a certain revision, :Lu: shall
produce the value 99999.
The standard error shall be used only for diagnostic messages.
None.
None.
The following exit values shall be returned:
- 0
- Successful completion.
- >0
- An error occurred.
Default.
The following sections are informative.
None.
- 1.
- The following example:
prs -d "User Names for :F: are:\n:UN:" s.file
might write to standard output:
User Names for s.file are:
xyz
131
abc
- 2.
- The following example:
prs -d "Delta for pgm :M:: :I: - :D: By :P:" -r s.file
might write to standard output:
Delta for pgm main.c: 3.7 - 77/12/01 By cas
- 3.
- As a special case:
might write to standard output:
s.file:
<blank line>
D 1.1 77/12/01 00:00:00 cas 1 000000/00000/00000
MRs:
bl78-12345
bl79-54321
COMMENTS:
this is the comment line for s.file initial delta
<blank line>
for each delta table entry of the
D type. The only option allowed to be
used with this special case is the
-a option.
None.
None.
admin ,
delta ,
get ,
what
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
.
