PRS(1) General Commands Manual PRS(1)

prs — print an SCCS file (DEVELOPMENT)

[XSI]
prs [-a][-d dataspec][-r[SID]file ...] file... [XSI]

prs [-e | -l] -c cutoff [-d dataspec] file... [XSI]

prs [-e | -l] -r[-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 (“POSIX.1”), xbd_chap12(7), 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:

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.
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.
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.
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.
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 inclusive, and values in the range [00,68] shall refer to years 2000 to 2068 inclusive.

It is expected that in a future version of IEEE Std 1003.1-2001 (“POSIX.1”) 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.

Request writing of information for both removed-that is, delta type = R (see )- 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 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:

Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), Section 8.2, Internationalization Variables for the precedence of internationalization variables used to determine the values of locale categories.)
If set to a non-empty string value, override the values of all the other internationalization variables.
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).
Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error.
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:

:PN::\n\n

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 Ta :Li:/:Ld:/:Lu: Ta S
:Li: Lines inserted by Delta Ta nnnnn*** Ta S
:Ld: Lines deleted by Delta Ta nnnnn*** Ta S
:Lu: Lines unchanged by Delta Ta nnnnn*** Ta S
:DT: Delta type Ta D or R Ta S
:I: SCCS ID string (SID) Ta See below** Ta S
:R: Release number Ta nnnn Ta S
:L: Level number Ta nnnn Ta S
:B: Branch number Ta nnnn Ta S
:S: Sequence number Ta nnnn Ta S
:D: Date delta created Ta :Dy:/:Dm:/:Dd: Ta S
:Dy: Year delta created Ta nn Ta S
:Dm: Month delta created Ta nn Ta S
:Dd: Day delta created Ta nn Ta S
:T: Time delta created Ta :Th:::Tm:::Ts: Ta S
:Th: Hour delta created Ta nn Ta S
:Tm: Minutes delta created Ta nn Ta S
:Ts: Seconds delta created Ta nn Ta S
:P: Programmer who created Delta Ta logname Ta S
:DS: Delta sequence number Ta nnnn Ta S
:DP: Predecessor Delta sequence Ta nnnn Ta S
number
:DI: Sequence number of deltas Ta :Dn:/:Dx:/:Dg: Ta S
included, excluded, or ignored
:Dn: Deltas included (sequence #) Ta :DS: :DS: ... Ta S
:Dx: Deltas excluded (sequence #) Ta :DS: :DS: ... Ta S
:Dg: Deltas ignored (sequence #) Ta :DS: :DS: ... Ta S
:MR: MR numbers for delta Ta text Ta M
:C: Comments for delta Ta text Ta M
:UN: User names User Names text M
:FL: Flag list Flags text M
:Y: Module type flag Ta text Ta S
:MF: MR validation flag Ta yes or no Ta S
:MP: MR validation program name Ta text Ta S
:KF: Keyword error, warning flag Ta yes or no Ta S
:KV: Keyword validation string Ta text Ta S
:BF: Branch flag Ta yes or no Ta S
:J: Joint edit flag Ta yes or no Ta S
:LK: Locked releases Ta :R: ... Ta S
:Q: User-defined keyword Ta text Ta S
:M: Module name Ta text Ta S
:FB: Floor boundary Ta :R: Ta S
:CB: Ceiling boundary Ta :R: Ta S
:Ds: Default SID Ta :I: Ta S
:ND: Null delta flag Ta yes or no Ta S
:FD: File descriptive text Comments text M
:BD: Body Body text M
:GB: Gotten body Ta text Ta 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:

Successful completion.
An error occurred.

Default.

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: 
    prs s.file

    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 type. The only option allowed to be used with this special case is the -a option.

None.

None.

admin(1), delta(1), get(1), what(1)

First released in Issue 2.

The phrase "in which keyword substitution is followed by a <newline>" is deleted from the end of the second paragraph of Data Keywords.

The interpretation of the YY component of the -c cutoff argument is noted.

The normative text is reworded to emphasize the term "shall" for implementation requirements.

The Open Group Base Resolution bwg2001-007 is applied, updating the table in STDOUT with a note that line statistics are capped at 99999 for the , , , and keywords.

The Open Group Interpretation PIN4C.00009 is applied.

footer end

December 6, 2001 posix.fail