delta(1)delta(1)NAMEdelta - make a delta (change) to an SCCS file
SYNOPSIS
SID] list] mrlist] comment] files
DESCRIPTION
The command is used to permanently introduce into the named SCCS file
changes that were made to the file retrieved by (called the g-file, or
generated file). See get(1).
makes a delta to each named SCCS file. If a directory is named,
behaves as though each file in the directory was specified as a named
file, except that non-SCCS files (last component of the path name does
not begin with and unreadable files are silently ignored. If a name of
is given, the standard input is read (see WARNINGS). Each line of the
standard input is taken to be the name of an SCCS file to be processed.
may issue prompts on the standard output, depending upon certain
options specified and flags (see admin(1)) that may be present in the
SCCS file (see the and options below).
Options
Option arguments apply independently to each named file.
Uniquely identifies which delta is to be made to the
SCCS file. Use of this option is necessary only
if two or more outstanding for editing on the
same SCCS file were done by the same person
(login name). The SID value specified with the
option can be either the SID specified on the
command line or the SID to be made as reported by
the command (see get(1)). A diagnostic results
if the specified SID is ambiguous, or, if neces‐
sary and omitted on the command line.
Suppresses issuing, on the standard output, of the created
delta's
SID as well as the number of lines inserted,
deleted and unchanged in the SCCS file.
Specifies retention of the edited
g-file (normally removed at completion of delta
processing).
Specifies a list (see get(1) for the definition of list) of
deltas which are to be when the file is accessed
at the change level (SID) created by this delta.
If the SCCS file has the flag set (see admin(1)), a Mod‐
ification Request (MR) number be supplied as the
reason for creating the new delta.
If is not used and the standard input is a termi‐
nal, the prompt is issued on the standard output
before the standard input is read. If the stan‐
dard input is not a terminal, no prompt is
issued. The prompt always precedes the prompt
(see the option).
MRs in a list are separated by blanks and/or tab
characters. An unescaped new-line character ter‐
minates the MR list.
Note that if the flag has a value (see admin(1)),
it is assumed to be the name of a program (or
shell procedure) that is to validate the correct‐
ness of the MR numbers. If a non-zero exit sta‐
tus is returned from the MR number-validation
program, assumes that the MR numbers were not all
valid and terminates.
Arbitrary text used to describe the reason for making the delta.
A null string is considered a valid comment.
If is not specified and the standard input is a
terminal, the prompt is issued on the standard
output before the standard input is read. If the
standard input is not a terminal, no prompt is
issued. An unescaped new-line character termi‐
nates the comment text.
Causes to print (on the standard output in a diff(1)
format) the SCCS file differences before and
after the delta is applied.
EXTERNAL INFLUENCES
Environment Variables
determines the interpretation of text as single- and/or multi-byte
characters.
determines the language in which messages are displayed.
If or is not specified in the environment or is set to the empty
string, the value of is used as a default for each unspecified or empty
variable. If is not specified or is set to the empty string, a default
of "C" (see lang(5)) is used instead of If any internationalization
variable contains an invalid setting, behaves as if all international‐
ization variables are set to "C". See environ(5).
International Code Set Support
Single- and multi-byte character code sets are supported.
DIAGNOSTICS
Use sccshelp(1) for explanations.
WARNINGS
SCCS files can be any length, but the number of lines in the text file
itself cannot exceed 99999 lines.
Lines beginning with an ASCII SOH character (octal 001) cannot be
placed in the SCCS file unless the SOH is escaped. This character has
special meaning to SCCS (see sccsfile(4)) and will cause an error.
A of many SCCS files, followed by a of those files, should be avoided
when the generates a large amount of data. Instead, multiple sequences
should be used.
If the standard input is specified on the command line, the (if neces‐
sary) and options must also be present. Omission of these options
causes an error.
Comments can be of multiple lines. The maximum length of the comment
(total length of all comment lines) cannot exceed 1024 bytes. No line
in a comment should have a length of more than 1000 bytes.
FILES
All of the auxiliary files listed below, except for the g-file, are
created in the same directory as the s-file (see get(1)). The g-file
is created in the user's working directory.
g-file Existed before the execution of removed after
completion of (unless was specified).
p-file Existed before the execution of may exist after
completion of
q-file Created during the execution of removed after
completion of
x-file Created during the execution of renamed to SCCS
file after completion of
z-file Created during the execution of removed during
the execution of
d-file Created during the execution of removed after
completion of
Program to compute differences between the file retrieved by
and the g-file.
SEE ALSOadmin(1), bdiff(1), cdc(1), get(1), sccshelp(1), prs(1), rmdel(1),
sccsfile(4).
STANDARDS CONFORMANCEdelta(1)
