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sccs-delta(1) User Commands sccs-delta(1) NAME sccs-delta, delta - make a delta to an SCCS file SYNOPSIS /usr/ccs/bin/delta [-dfhknopsz] [-g sid-list | -gsid-list] [-m mr-list | -mmr-list] [-q[nsedelim]] [-r sid | -rsid] [-y [comment]] [-D diff-file] [-Xextended-options] [-Nbulk-spec] s.filename... DESCRIPTION The delta utility checks in a record of the line-by-line differences made to a checked-out version of a file under SCCS control. These changes are taken from the writable working copy that was retrieved using the SCCS get command (see sccs-get(1)). This working copy does not have the `s.' pre- fix, and is also referred to as a g-file. If a directory name is used in place of the s.filename argument, the delta command applies to all s.files in that directory. Unreadable s.files pro- duce an error; processing continues with the next file (if any). The use of `-' as the s.filename argument indicates that the names of files are to be read from the standard input, one s.file per line (requires -y, and in some cases, -m). delta may issue prompts on the standard output depending upon the options specified and the flags that are set in the s.file (see sccs-admin(1), and the -m and -y options below, for details). OPTIONS The following options are supported: -b Use command bdiff(1) instead of fsdiff(1). This version of delta(1) by default uses fsdiff(1) that is faster than bd- iff(1) and does not slow down as much with larger file size. -d Use command diff(1) instead of bdiff(1). Returns exit status 2 instead of 1 if the s.filename argument is not specified. -f In NSE mode, this option allows one to enforce a delta even when no p.file exists. The new SID is assigned using the same rules as with get -e. This option is usually used together with the -q and -n op- tions. This option is an undocumented SUN extension that does not ex- ist in historic sccs implementations. -h In NSE mode, this option allows one to use diffh(1) for large files. This option is currently defunct. This option is an undocumented SUN extension that does not ex- ist in historic sccs implementations. -k Suppresses expansion of ID keywords when delta(1) is doing an implicit get(1) operation because -N+... was specified. This option is a SCHILY extension that does not exist in his- toric sccs implementations. -n Retain the edited g-file, which is normally removed at the completion of processing. -p Display line-by-line differences (in diff(1) format) on the standard output. -q[nsedelim] Enable NSE mode. If NSE mode is enabled, several NSE related extensions may be used. In this release, the value of nsede- lim is ignored. In NSE mode, delta behaves as if the -o option was specified and never issues a warning about missing id keywords. This option is an undocumented SUN extension that does not ex- ist in historic sccs implementations. -s Silent. Do not display warning or confirmation messages. Do not suppress error messages (which are written to standard er- ror). -g sid-list | -gsid-list Specify a list of deltas to omit when the file is accessed at the SCCS version ID (SID) created by this delta. This causes the file to be checked out later to differ from the checked in file unless `get -isid-list' with the same sid-list is speci- fied during checkout. sid-list is a comma-separated list of SIDs. To specify a range of deltas, use a `-' separator in- stead of a comma, between two SIDs in the list. -m mr-list | -mmr-list If the SCCS file has the v flag set (see sccs-admin(1)), you must supply one or more Modification Request (MR) numbers for the new delta. When specifying more than one MR number on the command line, mr-list takes the form of a quoted, space-sepa- rated list. If -m is not used and the standard input is a ter- minal, delta prompts with `MRs? ' for the list (before issuing the `comments? ' prompt). If the v flag in the s.file has a value, it is taken to be the name of a program to validate the MR numbers. If that validation program returns a non-zero exit status, delta terminates without checking in the changes. -o Use the original time of the edited file for the delta time when applying the delta. In NSE mode this is the default be- havior. This option is a SCHILY extension that does not exist in his- toric sccs implementations. -r sid | -rsid When two or more versions are checked out, specify the version to check in. This SID value can be either the SID specified on the get command line, or the SID of the new version to be checked in as reported by get. A diagnostic results if the specified SID is ambiguous, or if one is required but not sup- plied. -y[comment] Supply a comment for the delta table (version log). A null comment is accepted, and produces an empty commentary in the log. If -y is not specified and the standard input is a termi- nal, delta prompts with `comments? '. An unescaped NEWLINE terminates the comment. -z Enable CMF extensions for MR number handling. This option is an undocumented SUN extension that does not ex- ist in historic sccs implementations. -Cdir Specify the base directory for the g-file relative to the cur- rent working directory. By default, the g-file is searched for in the current directory (independent from the location of the s.file. This option is a SCHILY extension that does not exist in his- toric sccs implementations. -Ddiff-file Provide a file with prepared diff output to delta(1). If this option is present, delta(1) will not get the previous file content and call diff(1) on the previous file content and the current file content, but read the diff-file instead. This option is a SCHILY extension that does not exist in his- toric sccs implementations. -Nbulk-spec Processes a bulk of SCCS history files. This option allows one to do an efficient mass processing of SCCS history files. The bulk-spec parameter is composed from an optional list of flag parameters followed by an optional path specifier. The following flag types are supported: + If bulk-spec is preceded by a `+', delta(1) removes the original g-files and replaces them by file con- tent that is retrieved by a get(1) operation on the related s.file. This option is ignored if -n has been specified. space This is a placeholder dummy flag that allows one to use a prepared string for the -N option and to re- place the space character by one of the supported flags on demand. The following path specifier types are supported: -N The file name parameters to the delta command are not s.filename files but the names of the g-files. The s.filename names are automatically derived from the g-file names by prepending s. to the last path name component. Both, s.filename and the g-file are in the same directory. -Ns. The file name parameters to the delta command are s.filename files. The the g-files names are auto- matically derived by removing s. from the beginning of last path name component of the s.filename. Both, s.filename and the g-file are in the same di- rectory. -Ndir The file name parameters to the delta command are not s.filename files but the names of the g-files. The s.filename names are put into directory dir, the names are automatically derived from the g-file names by prepending dir/s. to the last path name component. -Ndir/s. The file name parameters to the delta command are s.filename files in directory dir. The the g-files names are automatically derived by removing dir/s. from the beginning of last path name component of the s.filename. A typical value for dir is SCCS. In order to overcome the limited number of exec(2) arguments, it is recommended to use `-' as the file name parameter for delta(1) and to send a list of path names to stdin. This option is a SCHILY extension that does not exist in his- toric sccs implementations. -Xextended-options Specify extended options. The argument extended-options may be a comma separated list of extended option names. The following extended options are supported, they may be ab- breviated as long as the abbreviation is still unique: date=datetime Allows one to overwrite the usual methods to determine the time stamp used for a new delta. This is needed to e.g. convert a historic SCCS history into a new project oriented bundle history. The format of the datetime argument is the same as for cutoff times but nanosec- onds and a time zone offset are permitted in addition. gpath=g-path Specify a different path to the g-file instead of de- riving the path from the s-file using an algorithm that may not apply in a specific case. This option is needed to manage the changeset file. nobulk Disables the -N (bulkmode) filename translations. This is needed to disable a -N option that is automatically added by sccs(1) in NewMode and would otherwise make it impossible to deal with the changeset file ``.sccs/SCCS/s.changeset''. mail=address Set address as e-mail address in the delta table for the SID just created. prepend Prepend the current content of the g-file to the previ- ous content of that file. With this option, there is no need to unpack the old reference version and to diff the current version against that old version. This causes a major performance win that is used for updat- ing the sccschangeset(5) file when in project mode. user=name Use a different user name for the programmer field in the delta table. By the default, the logname is used for this field. Using a different name may however later deny the permission to modify a delta by programs like cdc(1). 0 When reading filenames from stdin, triggered by a file name argument `-', the filename separator is a null byte instead of a newline. This allows one to use long lists with arbitrary filenames. help Print a short online help for available options. The -X option is a SCHILY extension that does not exist in historic sccs implementations. -V -version --version Prints the delta version number string and exists. This option is a SCHILY extension that does not exist in his- toric sccs implementations. ENVIRONMENT VARIABLES See environ(7) for descriptions of the following environment variables that affect the execution of delta(1): LANG, LC_ALL, LC_COLLATE, LC_CTYPE, LC_MESSAGES, and NLSPATH. SCCS_NO_HELP If set, delta(1) will not automatically call help(1) with the SCCS error code in order to print a more helpful error message. Scripts that depend on the exact error messages of SCCS commands should set the environment variable SCCS_NO_HELP and set LC_ALL=C. STDOUT If the -s option was not specified, delta prints statistics about file ac- tivities in the following format: new-sid nn inserted nn deleted nn unchanged EXIT STATUS The following exit values are returned: 0 Successful completion. 1 An error occurred and the -d option had not been specified. 2 An error occurred, the -d option had been specified, and the s.file- name argument was not specified. FILES d.file temporary file created by the delta(1) program with the content of the previous version, used to compute differences to the current version e.file temporary file to hold an uuencoded version of the g-file in case of an encoded history file p.file permission (lock) file for checked-out versions. See sccs- get(1) for a description of the layout of the p.file. q.file temporary copy of the p.file; renamed to the p.file after com- pletion s.file SCCS history file, see sccsfile(5). x.file temporary copy of the s.file; renamed to the s.file after com- pletion z.file temporary lock file contains the binary process id in host byte order followed by the host name dump.core If the file dump.core exists in the current directory and a fa- tal signal is received, a coredump is initiated via abort(3). ATTRIBUTES See attributes(7) for descriptions of the following attributes: /usr/ccs/bin/delta +------------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +------------------------------+-----------------------------+ | Availability |SUNWsprot | +------------------------------+-----------------------------+ SEE ALSO sccs(1), sccs-add(1), sccs-admin(1), sccs-branch(1), sccs-cdc(1), sccs-check(1), sccs-clean(1), sccs-comb(1), sccs-commit(1), sccs-create(1), sccs-cvt(1), sccs-deledit(1), sccs-delget(1), sccs-diffs(1), sccs-edit(1), sccs-editor(1), sccs-enter(1), sccs-fix(1), sccs-get(1), sccs-help(1), sccs-histfile(1), sccs-info(1), sccs-init(1), sccs-istext(1), sccs-ld- iffs(1), sccs-log(1), sccs-print(1), sccs-prs(1), sccs-prt(1), sccs-rcs2sccs(1), sccs-remove(1), sccs-rename(1), sccs-rmdel(1), sccs-root(1), sccs-sact(1), sccs-sccsdiff(1), sccs-status(1), sccs-tell(1), sccs-unedit(1), sccs-unget(1), sccs-val(1), bdiff(1), diff(1), fsdiff(1), what(1), sccschangeset(5), sccsfile(5), attributes(7), environ(7), stan- dards(7). DIAGNOSTICS Use the SCCS help command for explanations (see sccs-help(1)). WARNINGS Lines beginning with an ASCII SOH character (binary 001) cannot be placed in the SCCS file if the SCCS v4 history file format is used, unless the SOH is escaped. This character has special meaning to SCCS (see sccsfile(5)) and produces an error in SCCS v4 mode. SCCS v6 automatically escapes such characters and thus allows to use ASCII SOH at any place in a file. If delta(1) is used in force mode (using `delta -q -f -n s.file'), using the option -gsid-list in addition will result in unexpected behavior. This is because the file content used for delta(1), differs from what is ex- tracted using get(1). As in force delta mode, get(1) is usually not used, the next delta will revert the effect of the `delta -g...' call. BUGS None currently known. Mail bugs and suggestions to schilytools@mlists.in-berlin.de or open a ticket at https://codeberg.org/schilytools/schilytools/issues. The mailing list archive may be found at: https://mlists.in-berlin.de/mailman/listinfo/schilytools-mlists.in-berlin.de. AUTHORS The SCCS suite was originally written by Marc J. Rochkind at Bell Labs in 1972. Release 4.0 of SCCS, introducing new versions of the programs ad- min(1), get(1), prt(1), and delta(1) was published on February 18, 1977; it introduced the new text based SCCS v4 history file format (previous SCCS releases used a binary history file format). The SCCS suite was later maintained by various people at AT&T and Sun Microsystems. Since 2006, the SCCS suite has been maintained by Joerg Schilling and is now maintained by the schilytools project authors. SOURCE DOWNLOAD The source code for SCCS is included in the schilytools project and may be retrieved from the schilytools project at Codeberg at https://codeberg.org/schilytools/schilytools. The download directory is https://codeberg.org/schilytools/schilytools/releases. SunOS 5.11 2022/10/06 sccs-delta(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT VARIABLES | STDOUT | EXIT STATUS | FILES | ATTRIBUTES | SEE ALSO | DIAGNOSTICS | WARNINGS | BUGS | AUTHORS | SOURCE DOWNLOAD
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