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TechTip: The Find Object (FND) Command for the Integrated File System

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Search the IFS for objects by name and type—excluding the file systems or directories you wish—and save the result to a database file.

Have you struggled to find certain objects in the IFS? This command solves the problem.

The main characteristics of the Find Object (FND) command are the following:

  • The object name specified in the search can be a regular expression.
  • A list of file systems and/or directories can be excluded from the search.
  • Symbolic links pointing to directories can be followed or not.
  • Multiple paths to the same directory can be searched or not.
  • A sort sequence can be specified to determine the order in which matches found are shown and the order in which subdirectories of a directory are searched.
  • The search result can be sent to the display, a printer file, or a database file.
  • The log generated in the process can be sent along with the result or printed to a separated spool file.

This command can be downloaded for versions 7.1 and 7.3 in English and Spanish. <- Kara, please put the zip files into the two links. Note the “en” for English and “es” for Spanish.

FND Parameters

The parameters of the command are shown in Figures 1 and 2:

TechTip: The Find Object (FND) Command for the Integrated File System - Figure 1

Figure 1: Parameters of command FND, part 1

TechTip: The Find Object (FND) Command for the Integrated File System - Figure 2

Figure 2: Parameters of command FND, part 2

The Search

The search in a directory first examines the objects contained in the directory. Then, if it has been specified to search the subdirectories of directories (parameter SUBTREE), the search continues in these subdirectories in the order specified in the sort sequence (parameter SRTSEQ).

For every directory, the objects that match the name and type specified are listed in the order indicated in the sort sequence.

When a directory can be reached through different paths, the objects contained in this directory might appear several times in the search result. Parameter MLTPATH (search multiple paths) specifies whether all of the paths to a directory are searched—as the UNIX command find does—or only one of them (the first one reached according to the search order).

Regular Expressions

The patterns allowed in the object name are the extended regular expressions (EREs) used in the UNIX commands awk, ed, and grep. These expressions are similar to those used in the SQL predicate REGEXP_LIKE.

Some of the special characters used in these regular expressions are the following:

 

Special Characters for Regular Expressions

 

. (dot)

Any character

?

The preceding item can appear 0 or 1 times

*

The preceding item can appear 0 or more times

+

The preceding item must appear 1 or more times

^

Beginning of line/name

$

End of line/name

\

Removes the special meaning of a special character

\d

Digit

\D

Any character that is not a digit

\s

Generic space—that is, space, tab, end of line, line feed, or carriage return

\S

Any character that is not a generic space

|

Any of the preceding or following items (OR)

()

Group

[abc]

Any of the characters enclosed in brackets

[^abc]

Any character not enclosed in brackets

[a-f]

Range of characters

[^a-f]

Any character out of the range of characters

Regular expressions are managed through the procedures regcomp, regexec, and regfree of service program QC2POSIX. Documentation about these procedures can be found in the IBM i handbook ILE C/C++ Runtime Library Functions.

The prototypes for these procedures are listed in member REGEX of file QSYSINC/H. These prototypes, converted to RPG, can be downloaded along with the command FND.

Object Types

The types of objects specified (parameter OBJTYPE) can be of the file system QSYS.LIB (*FILE, *PGM, etc.) or other file systems. The object types not belonging to QSYS.LIB are the following:

 

Object Types Not in QSYS.LIB

 

*BLKSF

Block special file

*CHRSF

Character special file

*DDIR

Distributed directory

*DIR

Directory

*DOC

Document

*DSTMF

Distributed stream file

*FIFO

First-in-first-out special file

*FLR

Folder

*SOCKET

Socket

*STMF

Stream file

*SYMLNK

Symbolic link

The special values for parameter OBJTPE are the following:

 

Special Values for OBJTYPE

 

*ALL

Any type

*ALLDIR

Any directory (*DDIR, *DIR, *FILE, *FLR, *LIB)

*ALLNODIR

Any type that is not a directory

File Systems Excluded

Parameter EXCFS allows us to specify the file systems that are going to be excluded from the search. The values used to refer to file systems are the following:

 

File Systems

 

*NFS

Network file systems (NFS). Remote.

*QDLS

Document library services file system (QDLS)

*QFSVR400

File server file systems (QFileSvr.400). Remote.

*QNTC

NetClient file systems (QNTC). Remote.

*QOPENSYS

Open Systems file system (QOpenSys)

*QOPT

Optical file system (QOPT)

*QSYS

Library file system (QSYS.LIB)

*QSYSIASP

Independent ASP library file systems

*UDFS

User-defined file systems

*UDFSMGT

User-defined management file systems

*REMOTE

Remote file systems (*NFS, *QFSVR400, *QNTC)

The default value for this parameter is *NONE, but, if the command is prompted, all of the file systems except root and QOpenSys will be included in the parameter (see Figure 1). This can be useful if you search the UNIX-like file systems most of the time.

However, these values—and any other default value for the other parameters—can be altered by changing the prompt override program of the command. An example of this program is shown next:

                   PGM       PARM(&C_CMD &C_PARM)

/* */

             DCL       &C_CMD        *CHAR    20

             DCL       &C_PARM       *CHAR   202

             DCL       &EOL          *CHAR     1

             DCL       &EXCFSKWD     *CHAR    15

             DCL       &EXCFSVAL     *CHAR   100

             DCL       &PARMLEN      *DEC      3

/* */

             MONMSG     MSGID(CPF0000) +

                        EXEC(GOTO CMDLBL(ERRORS))

/* */

             CHGVAR     &EOL X'00'

             CHGVAR     &EXCFSKWD '??EXCFS('

             CHGVAR     &EXCFSVAL +

'*QDLS *QOPT *QSYS *QSYSIASP *UDFS *UDFSMGT *REMOTE)'

             CHGVAR     &C_PARM (' ' *CAT &EXCFSKWD *TCAT &EXCFSVAL)

/* */

             CHGVAR     &C_PARM (%trimr(&C_PARM) *CAT &EOL)

             CHGVAR     &PARMLEN (%scan(&EOL &C_PARM) - 3)

             CHGVAR     %bin(&C_PARM 1 2) &PARMLEN

/* */

             RETURN

ERRORS:

             CHGVAR     &C_PARM X'0000'

FINAL:

             ENDPGM

You can find more information about prompt override programs in the IBM i handbook CL Overview and Concepts.

Output

The search result can be sent to the display, a printer file, or a database file. Figure 3 shows an example of output sent to the display or a printer file:

TechTip: The Find Object (FND) Command for the Integrated File System - Figure 3

Figure 3: Example of output for command FND

The first seven lines of the result of Figure 3 (from lib_data.h to zlib.h) correspond to the entries of directory /qopensys/usr/include, and the next lines to the entries of its subdirectories.

If the output is directed to a database file, this file is created with the following format:

 

Format of Output File

 

Field

Type

 

Text

OBTYPE

10A

 

Object type

OBLOG

5A

 

Log

OBPATH

256A

VARLEN

Object path

Log

Parameter LOG specifies whether a search log is kept or not as well as whether it is sent along with the search result or printed to a separate spool file.

The events that can be included in the log are the following:

 

Log Events

 

DUP

Directory duplicated, that is, already searched

ECHK

Error in checking object

ECLO

Error in closing directory

ECMP

Error in comparing object name

EOPN

Error in opening directory

EREAD

Error in reading directory entries

EXCD

Excluded directory

EXCFS

Excluded file system

LONGN

Name too long

LONGP

Path too long

LOOP

Searching this directory would cause a loop

NAUT

Not authorized to object

NDIR

Object is not a directory

NFND

Object not found

The FND command helps you find the objects in the IFS that you’re looking for. Enjoy!

Juan Macias

Juan Macias has a Degree in Mathematics (1988) and a Master in Data Management from the Universidad Complutense de Madrid (1989). He's a developer of RPG and COBOL applications mainly for finance and insurance companies. He can be contacted at correojrm@yahoo.es.

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