GET(1s,C) AIX Commands Reference GET(1s,C) ------------------------------------------------------------------------------- get PURPOSE Extracts a specified version of a Source Code Control System (SCCS) file. SYNTAX +-------------------------------+ +---------+ +------------+ get ---| +---------------------------+ |---| one of |---| |---| +-| -b -k -s |-+ | +-----+ | +--- file ---+ ^| -c cutoff -m -t || +-| -l |-+ ^ | || -e -n -x list || | -lp | +--------+ || -g -p -w string || +-----+ || -i list -rSID || |+---------------------------+| +-----------------------------+ DESCRIPTION The get command reads the specified versions of the named Source Code Control System (SCCS) files, creates an ASCII text file for each file according to the specified flags, and writes each text file to a file with the same name as the original SCCS file without the s. (s period) prefix (the g-file). The flags and files can be specified in any order, and all flags apply to all named files. If you specify a directory in place of file, the get command performs the requested actions on all the files in the directory that begin with the s. prefix. If you specify a - (minus) in place of a file, the get command reads standard input and interprets each line as the same of an SCCS file. The get command continues to read input until it reads END OF FILE (Ctrl-D). If the effective user has write permission in the directory containing the SCCS files but the real user does not, only one file can be named when the -e flag is used. If you are not familiar with the terms SID and delta or you do not know the numbering system of the deltas, see AIX Operating System Programming Tools and Interfaces for more information. SCCS Files In addition to the file with the s. prefix (the s-file), the get command can create several auxiliary files: the g-file, l-file, p-file, and z-file. These files are identified by their tag, the letter before the hyphen. The get command names auxiliary files by replacing the leading s. in the SCCS file name Processed November 8, 1990 GET(1s,C) 1 GET(1s,C) AIX Commands Reference GET(1s,C) with the proper tag, except for the g-file, which is named by removing the s. prefix. So, for a file named s.sample, the auxiliary file names would be sample, l.sample, p.sample, and z.sample. These files serve the following purposes: s-file This file contains the original file text and all the changes (deltas) made to the file. It also includes information about who can change the file contents, who has made changes, when those changes were made, and what the changes were. You cannot edit this file directly since the file is read-only. It contains the information needed by the SCCS commands to build the g-file, the file you can edit. g-file The g-file is an ASCII text file that contains the text of the SCCS file version that you specify with the -r flag (or the latest trunk version by default). You can edit this file directly. When you have made all your changes and you want to make a new delta to the file, you can then apply the delta command to the file. The get command creates the g-file in the current directory. The get command creates a g-file whenever it runs, unless the -g flag or the -p flag is specified. The real user owns it (not the effective user). If you do not specify the -k or the -e flag, the file is read-only. If the -k or the -e flag is specified, the owner has write permission for the g-file You must have write permission in the current directory to create a g-file. l-file The get command creates the l-file when the -l flag is specified. The l-file is a read only file. It contains a table showing which deltas were applied in generating the g-file. You must have write permission in the current directory to create an l-file. Lines in the l-file have the following format: 1. A blank character if the delta was applied; a "*" appears otherwise. 2. A blank character if the delta was applied or was not applied and ignored; a * appears if the delta was not applied and was not ignored. 3. A code indicating a special reason why the delta was or was not applied: Blank Included or excluded normally. I Included using the -i flag. X Excluded using the -x flag. C Cut off using the -c flag. 4. The SID. 5. The date and time the file was created. Processed November 8, 1990 GET(1s,C) 2 GET(1s,C) AIX Commands Reference GET(1s,C) 6. The login name of person who created the delta. Comments and MR data follow on subsequent lines, indented one horizontal tab character. A blank line ends each entry. For example, for a delta cutoff with the -c flag, the entry in the l-file might be: **C 1.3 85/03/13 12:44:16 pat and the entry for the initial delta might be: 1.1 85/02/27 15:42:20 pat date and time created 85/02/27 15:42:20 by pat p-file The get command creates the p-file when the -e or the -k flag is specified. The p-file passes information resulting from a get -e to a delta command. The p-file also prevents a subsequent execution of get with a -e flag for the same SID until delta is run or the joint edit keyletter (j) is set in the SCCS file. The j keyletter allows several gets on the same SID. The p-file is created in the directory containing the SCCS file. To create a p-file in the SCCS directory, you must have write permission in that directory. The permission code of the p-file is read-only to all but its owner, and it is owned by the effective user. The p-file contains: o The current SID o The SID of new delta to be created o The user name o The date and time of the get o The -i flag, if it was present o The -x flag, if it was present The p-file contains an entry with the above information for each pending delta for the file. No two lines have the same new delta SID. z-file The z-file is a lock mechanism against simultaneous updates. The z-file contains the binary process number of the get command that created it. It is created in the directory containing the SCCS file and exists only while the get command is running. When you use the get command, it displays the SID being accessed and the number of lines created from the SCCS file. If you specify the -e flag, the SID of the delta to be made appears after the SID accessed and before the number of lines created. If you specify more than one file, or a directory, or standard input, the get command displays the file name before each file is processed. If you specify the -i flag, the get command lists included deltas below the word "Included". If you specify the -x flag, the get command lists excluded deltas below the word "Excluded". Identification Keywords Processed November 8, 1990 GET(1s,C) 3 GET(1s,C) AIX Commands Reference GET(1s,C) You can use identification keywords in your files to insert identifying information. These keywords are replaced by their values in the g-file when the get command is invoked without the -e or -k flag. Note: For unformatted files, insert a null effect troff sequence into the keywords so that sccs will not expand them; for example, % M % becomes %M\&%. The following identification keywords can be used in SCCS files: % M % Module name: the value of the m flag in the SCCS file % I % The SID (% R %.% L %.% B %.% S %) of the g-file % R % Release % L % Level % B % Branch % S % Sequence % D % Date of the current get (YY/MM/DD) % H % Date of the current get (MM/DD/YY) % T % Time of the current get (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: the value of the t flag in the SCCS file % F % SCCS file name % P % Full path name of the SCCS file % Q % The value of the q flag in the file % C % The current line number. This keyword is intended for identifying messages output by the program. It is not intended to be used on every line to provide sequence numbers. % Z % The 4-character string "@(#)" recognized by the what command % W % A shorthand notation for constructing what command strings for AIX program files. Its value is the characters and keyletters: % W % = % Z %% M %% I % % A % Another shorthand notation for constructing what command strings for non-AIX program files. Its value is the keyletters: % A % = % Z %% Y % % M % % I %% Z % Figure 4 illustrates how the get command determines the SID of the file it retrieves, and what the pending SID is. The column SID Specified shows the various ways the SID can be specified with the -r flag. The two columns illustrate the various conditions that can exist, including whether the -b flag is used with the get -e command. The SID Retrieved indicates the SID of the file that makes up the g-file. The SID of Delta to be Created column indicates the SID of the version that will is created when the delta command is applied. Processed November 8, 1990 GET(1s,C) 4 GET(1s,C) AIX Commands Reference GET(1s,C) +-----------------------------------------------------------------------------+ |Figure 4. SID Determination for get Command | +-------------+-----+-------------------------------+---------+---------------+ |SID | -b | Other | SID | SID of | |Specified | Used| Conditions | | Delta | | | | | Retrieve| to be | | | | | | Created | +-------------+-----+-------------------------------+---------+---------------+ |none1 | no | R defaults to mR2 | mR.mL | mR.(mL+1) | +-------------+-----+-------------------------------+---------+---------------+ |none1 | yes | R defaults to mR | mR.mL | mR.mL.(mB+1).1| +-------------+-----+-------------------------------+---------+---------------+ |(R)elease | no | R > mR | mR.mL | R.13 | +-------------+-----+-------------------------------+---------+---------------+ |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 | N/A | R < mR and R does not exist | hR.mL6 | hR.mL.(mB+1).1| +-------------+-----+-------------------------------+---------+---------------+ |R | N/A | R < mR and R exists | R.mL | R.mL.(mB+1).1 | +-------------+-----+-------------------------------+---------+---------------+ |R.(L)evel | no | No trunk successor | R.L | R.(L+1) | +-------------+-----+-------------------------------+---------+---------------+ |R.L | yes | No trunk successor | R.L | R.L(mB+1).1 | +-------------+-----+-------------------------------+---------+---------------+ |R.L | N/A |Trunk successor in release => R| R.L | R.L.(mB+1).1 | +-------------+-----+-------------------------------+---------+---------------+ |R.L.(B)ranch | no | No branch successor | R.L.B.mS| R.L.B.(mS+1) | +-------------+-----+-------------------------------+---------+---------------+ |R.L.B | yes | No branch successor | R.L.B.mS| R.L.(mB+1).1 | +-------------+-----+-------------------------------+---------+---------------+ |R.L.B.(S)eque|cno | No branch successor | R.L.B.S | R.L.B.(S+1) | +-------------+-----+-------------------------------+---------+---------------+ |R.L.B.S | yes | No branch successor | R.L.B.S | R.L.(mB+1).1 | +-------------+-----+-------------------------------+---------+---------------+ |R.L.B.S | N/A | Branch successor | R.L.B.S | R.L.(mB+1).1 | +-------------+-----+-------------------------------+---------+---------------+ | | |1 Applies only if the d (default SID) flag is not present in the file (see | |"admin") | |2 The mR indicates the maximum existing release. | |3 Forces creation of the first delta in a new release. | |6 The hR is the highest existing release that is lower than the specified, | |nonexistent, release R. | +-----------------------------------------------------------------------------+ FLAGS Processed November 8, 1990 GET(1s,C) 5 GET(1s,C) AIX Commands Reference GET(1s,C) -b Specifies that the delta to be created should have an SID in a new branch. The new SID is numbered according to the rules stated in Figure 4. You can use the -b flag only with the -e flag. It is necessary only when you want to branch from a leaf delta (a delta without a successor). Attempting to create a delta at a nonleaf delta automatically results in a branch, even if the b header flag is not set. If you do not specify the b header flag in the SCCS file, the get command ignores the -b flag because the file does not allow branching (see the discussion of header flags on page admin-3). -c cutoff Specifies a cutoff date and time, in the form: YY[MM[DD[HH[MM[SS]]]]]. The get command includes no deltas to the SCCS file created after the specified cutoff in the g-file. The values of any unspecified items in the cutoff default to their maximum allowable values. Thus, a cutoff date and time specified with only the year (YY) specifies the last month, day, hour, minute, and second of that year. Any number of non-numeric characters can separate the two-digit items of the cutoff date and time. This allows you to specify a date and time in a number of ways, as follows: -c85/9/2,9:00:00 -c"85/9/2 9:00:00" "-c85/9/2 9:00:00" -e Indicates that the g-file being created is to be edited by the user applying the get command. The changes are recorded later with the delta command. get -e creates a p-file that prevents other users from issuing another get -e command and editing a second g-file on the same SID before delta is run. The owner of the file can override this restriction by allowing joint editing on the same SID through the use of the admin command with the -fj flag. Other users, with permission, can obtain read-only copies by using the get command without the -e flag. The get -e command enforces SCCS file protection specified via the ceiling, floor, and authorized user list in the SCCS file (see "admin"). -g Suppresses the actual retrieval of text from the SCCS file. Use the -g flag primarily to create an l-file or to verify the existence of a particular SID. Do not use it with the -e flag. -i list Specifies a list of deltas to be included in the creation of a g-file. The SID list format consists of a combination of individual SIDs separated by commas and SID ranges indicated by two SIDs separated by a hyphen. You specify the same SIDs with both the following command lines: get -e -i1.4,1.5,1.6 s.file get -e -i1.4-1.6 s.file Processed November 8, 1990 GET(1s,C) 6 GET(1s,C) AIX Commands Reference GET(1s,C) You can specify the SCCS Identification of a delta in any form shown in the SID Specified column of Figure 4. The get command interprets partial SIDs as shown in the SID Retrieved column of the table. -k Suppresses replacement of identification keywords in the g-file by their value (see "Identification Keywords"). The -k flag is implied by the -e flag. If you accidentally ruin the g-file created by get with an -e flag, you can recreate it by reissuing the get command with the -k flag in place of the -e flag. -l[p] Writes a delta summary to an l-file. If you specify -lp, the delta summary is written to standard output, and the get command does not create the l-file. Use this flag to determine which deltas were used to create the g-file currently in use. See "SCCS Files" for the format of the l-file. -m Writes before each line of text in the g-file the SID of the delta that inserted the line into the SCCS file. The format is: SID tab line of text -n Writes the value of the % M % keyword before each line of text in the g-file (see "Identification Keywords" for information on keywords). The format is the value of % M %, followed by a horizontal tab, followed by the text line. When both the -m and -n flags are used, the format is: % M % value tab SID tab line of text -p Writes the text created from the SCCS file to standard output and does not create a g-file. The get command sends output normally sent to standard output to file descriptor 2 instead. If you specify the -s flag with the -p flag, output normally sent to standard output does not appear anywhere. Do not use the -p flag with the -e flag. -rSID Specifies the SCCS identification string (SID) of the SCCS file version to be created. Figure 4 shows what version of a file is created and the SID of the pending delta as functions of the SID specified. -s Suppresses all output normally written to standard output. Error messages (written to standard error output) remain unaffected. -t Accesses the most recently created delta in a given release or release and level. Without the -r flag, the get command accesses the most recent delta regardless of its SID. -w string Substitutes string for the % W % keyword in g-files not intended for editing (see "SCCS Files" for information on g-files). Processed November 8, 1990 GET(1s,C) 7 GET(1s,C) AIX Commands Reference GET(1s,C) -x list Excludes a list of deltas in the creation of a file. See the -i flag for the SID list format on page 6. EXAMPLES 1. To get an SCCS file for editing: get -e s.prog.c This command creates a file named "prog.c" that only you have permission to modify. It also creates a p.prog.c file that prevents other users from using a get -e and editing a second prog.c file on the same SID before the delta is run. No one else can use "prog.c" or "s.prog.c" until you use the delta command to indicate that you are finished. 2. To get an SCCS file for reading: get s.prog.c This command creates a file named "prog.c" that anyone can read, but that no one can modify. You can do this before searching files with the grep command or before compiling programs that are controlled with SCCS. RELATED INFORMATION See the following commands: "admin," "delta," "sccshelp," "prs," and "what." See the sccsfile file in AIX Operating System Technical Reference. See the discussion of SCCS in AIX Operating System Programming Tools and Interfaces. Processed November 8, 1990 GET(1s,C) 8