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Try using the UNIX style API's ... open, close .. etc.
D**********************************************************************
D* This code prevents this member from being /copy into the same
D* program twice. This allows you to /copy this file into your
D* own /copy members, without worry about conflicting with programs
D* that also /copy this.
D**********************************************************************
D/if defined(IFSIO_H)
D/eof
D/endif
D/define IFSIO_H
D*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
D*: DEFINITIONS EXPLAINED IN CHAPTER 2:
D*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
D**********************************************************************
D* Flags for use in open()
D*
D* More than one can be used -- add them together.
D**********************************************************************
D* Reading Only
D O_RDONLY C 1
D* Writing Only
D O_WRONLY C 2
D* Reading & Writing
D O_RDWR C 4
D* Create File if not exist
D O_CREAT C 8
D* Exclusively create
D O_EXCL C 16
D* Assign a CCSID
D O_CCSID C 32
D* Truncate File to 0 bytes
D O_TRUNC C 64
D* Append to File
D O_APPEND C 256
D* Synchronous write
D O_SYNC C 1024
D* Sync write, data only
D O_DSYNC C 2048
D* Sync read
D O_RSYNC C 4096
D* No controlling terminal
D O_NOCTTY C 32768
D* Share with readers only
D O_SHARE_RDONLY C 65536
D* Share with writers only
D O_SHARE_WRONLY C 131072
D* Share with read & write
D O_SHARE_RDWR C 262144
D* Share with nobody.
D O_SHARE_NONE C 524288
D* Assign a code page
D O_CODEPAGE C 8388608
D* Open in text-mode
D O_TEXTDATA C 16777216
D* Allow text translation
D* on newly created file.
D* Note: O_TEXT_CREAT requires all of the following flags to work:
D* O_CREAT+O_TEXTDATA+(O_CODEPAGE or O_CCSID)
D O_TEXT_CREAT C 33554432
D* Inherit mode from dir
D O_INHERITMODE C 134217728
D* Large file access
D* (for >2GB files)
D O_LARGEFILE C 536870912
D**********************************************************************
D* Mode Flags.
D* basically, the mode parm of open(), creat(), chmod(),etc
D* uses 9 least significant bits to determine the
D* file's mode. (peoples access rights to the file)
D*
D* user: owner group other
D* access: R W X R W X R W X
D* bit: 8 7 6 5 4 3 2 1 0
D*
D* (This is accomplished by adding the flags below to get the mode)
D**********************************************************************
D* owner authority
D S_IRUSR C 256
D S_IWUSR C 128
D S_IXUSR C 64
D S_IRWXU C 448
D* group authority
D S_IRGRP C 32
D S_IWGRP C 16
D S_IXGRP C 8
D S_IRWXG C 56
D* other people
D S_IROTH C 4
D S_IWOTH C 2
D S_IXOTH C 1
D S_IRWXO C 7
*---------------------------------------------------------------------
* open() -- Open File
*
* int open(const char *path, int oflag, . . .);
*
* path = path name of file to open
* oflag = open flags
* mode = file mode, aka permissions. (Reqd with O_CREAT flag)
* codepage = code page to assign to file (Reqd with O_CODEPAGE flag)
*
* Returns the file descriptor of the opened file
* or -1 if an error occurred
*---------------------------------------------------------------------
D open PR 10I 0 extproc('open')
D path * value options(*string)
D oflag 10I 0 value
D mode 10U 0 value options(*nopass)
D codepage 10U 0 value options(*nopass)
*---------------------------------------------------------------------
* write() -- Write to stream file
*
* int write(int fildes, const void *buf, size_t nbyte);
*
* fildes = file descriptor to write to
* buf = pointer to data to be written
* nbyte = number of bytes to write
*
* Returns the number of bytes written
* or a -1 if an error occurred
*---------------------------------------------------------------------
D write PR 10I 0 extproc('write')
D fildes 10I 0 value
D buf * value
D nbyte 10U 0 value
*---------------------------------------------------------------------
* read() -- Read from stream file
*
* int read(int fildes, void *buf, size_t nbyte);
*
* fildes = file descriptor to read from
* buf = pointer to memory to read into
* nbyte = maximum number of bytes to read
*
* Returns the number of bytes read
* or a -1 if an error occurred
*---------------------------------------------------------------------
D read PR 10I 0 extproc('read')
D fildes 10I 0 value
D buf * value
D nbyte 10U 0 value
*---------------------------------------------------------------------
* close() -- Close file descriptor
*
* int close(int fildes);
*
* fildes = file descriptor to close
*
* Returns 0 if successful
* or a -1 if an error occurred
*---------------------------------------------------------------------
/if not defined(CLOSE_PROTOTYPE)
D close PR 10I 0 extproc('close')
D fildes 10I 0 value
/define CLOSE_PROTOTYPE
/endif
D*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
D*: DEFINITIONS EXPLAINED IN CHAPTER 3:
D*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
**********************************************************************
* Access mode flags for access()
*
* F_OK = File Exists
* R_OK = Read Access
* W_OK = Write Access
* X_OK = Execute or Search
**********************************************************************
D F_OK C 0
D R_OK C 4
D W_OK C 2
D X_OK C 1
*--------------------------------------------------------------------
* Determine file accessibility
*
* int access(const char *path, int amode)
*
*--------------------------------------------------------------------
D access PR 10I 0 ExtProc('access')
D Path * Value Options(*string)
D amode 10I 0 Value
*--------------------------------------------------------------------
* Change file permissions
*
* int chmod(const char *path, mode_t mode)
*--------------------------------------------------------------------
D chmod PR 10I 0 ExtProc('chmod')
D path * Value options(*string)
D mode 10U 0 Value
*--------------------------------------------------------------------
* Rename a file or directory.
*
* int rename(const char *old, const char *new);
*--------------------------------------------------------------------
D rename PR 10I 0 ExtProc('Qp0lRenameKeep')
D old * Value options(*string)
D new * Value options(*string)
*--------------------------------------------------------------------
* Remove Link to File. (deletes 1 reference to a file. If this
* is the last reference, the file itself is deleted. See
* Chapter 3 for more info)
*
* int unlink(const char *path)
*--------------------------------------------------------------------
D unlink PR 10I 0 ExtProc('unlink')
D path * Value options(*string)
**********************************************************************
* File Information Structure (stat)
*
* struct stat {
* mode_t st_mode; /* File mode */
* ino_t st_ino; /* File serial number */
* nlink_t st_nlink; /* Number of links */
* uid_t st_uid; /* User ID of the owner of file */
* gid_t st_gid; /* Group ID of the group of file */
* off_t st_size; /* For regular files, the file
* * size in bytes */
* time_t st_atime; /* Time of last access */
* time_t st_mtime; /* Time of last data modification */
* time_t st_ctime; /* Time of last file status change */
* dev_t st_dev; /* ID of device containing file */
* size_t st_blksize; /* Size of a block of the file */
* unsigned long st_allocsize; /* Allocation size of the file */
* qp0l_objtype_t st_objtype; /* AS/400 object type */
* unsigned short st_codepage; /* Object data codepage */
* char st_reserved1[66]; /* Reserved */
* };
*
**********************************************************************
D p_statds S *
D statds DS BASED(p_statds)
D st_mode 10U 0
D st_ino 10U 0
D st_nlink 5U 0
D st_pad 2A
D st_uid 10U 0
D st_gid 10U 0
D st_size 10I 0
D st_atime 10I 0
D st_mtime 10I 0
D st_ctime 10I 0
D st_dev 10U 0
D st_blksize 10U 0
D st_allocsize 10U 0
D st_objtype 12A
D st_codepage 5U 0
D st_reserved1 62A
D st_ino_gen_id 10U 0
*--------------------------------------------------------------------
* Get File Information
*
* int stat(const char *path, struct stat *buf)
*--------------------------------------------------------------------
D stat PR 10I 0 ExtProc('stat')
D path * value options(*string)
D buf * value
D*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
D*: DEFINITIONS EXPLAINED IN CHAPTER 4:
D*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
D**********************************************************************
D* "whence" constants for use with lseek()
D**********************************************************************
D SEEK_SET C CONST(0)
D SEEK_CUR C CONST(1)
D SEEK_END C CONST(2)
D*--------------------------------------------------------------------
D* Set File Read/Write Offset
D*
D* off_t lseek(int fildes, off_t offset, int whence)
D*--------------------------------------------------------------------
D lseek PR 10I 0 ExtProc('lseek')
D fildes 10I 0 value
D offset 10I 0 value
D whence 10I 0 value
*--------------------------------------------------------------------
* Get File Information from descriptor
*
* int fstat(int fildes, struct stat *buf)
*--------------------------------------------------------------------
D fstat PR 10I 0 ExtProc('fstat')
D fildes 10I 0 value
D buf * value
D*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
D*: DEFINITIONS EXPLAINED IN CHAPTER 7:
D*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
D**********************************************************************
D*
D* Directory Entry Structure (dirent)
D*
D* struct dirent {
D* char d_reserved1[16]; /* Reserved */
D* unsigned int d_reserved2; /* Reserved */
D* ino_t d_fileno; /* The file number of the file */
D* unsigned int d_reclen; /* Length of this directory entry
D* * in bytes */
D* int d_reserved3; /* Reserved */
D* char d_reserved4[8]; /* Reserved */
D* qlg_nls_t d_nlsinfo; /* National Language Information
D* * about d_name */
D* unsigned int d_namelen; /* Length of the name, in bytes
D* * excluding NULL terminator */
D* char d_name[_QP0L_DIR_NAME]; /* Name...null terminated */
D*
D* };
D*
D**********************************************************************
D p_dirent s *
D dirent ds based(p_dirent)
D d_reserv1 16A
D d_reserv2 10U 0
D d_fileno 10U 0
D d_reclen 10U 0
D d_reserv3 10I 0
D d_reserv4 8A
D d_nlsinfo 12A
D nls_ccsid 10I 0 OVERLAY(d_nlsinfo:1)
D nls_cntry 2A OVERLAY(d_nlsinfo:5)
D nls_lang 3A OVERLAY(d_nlsinfo:7)
D nls_reserv 3A OVERLAY(d_nlsinfo:10)
D d_namelen 10U 0
D d_name 640A
D*--------------------------------------------------------------------
D* Make Directory
D*
D* int mkdir(const char *path, mode_t mode)
D*--------------------------------------------------------------------
D mkdir PR 10I 0 ExtProc('mkdir')
D path * Value options(*string)
D mode 10U 0 Value
D*--------------------------------------------------------------------
D* Remove Directory
D*
D* int rmdir(const char *path)
D*--------------------------------------------------------------------
D rmdir PR 10I 0 ExtProc('rmdir')
D path * value options(*string)
D*--------------------------------------------------------------------
D* Change Directory
D*
D* int chdir(const char *path)
D*--------------------------------------------------------------------
D chdir PR 10I 0 ExtProc('chdir')
D path * Value Options(*string)
D*--------------------------------------------------------------------
D* Open a Directory
D*
D* DIR *opendir(const char *dirname)
D*--------------------------------------------------------------------
D opendir PR * EXTPROC('opendir')
D dirname * VALUE options(*string)
D*--------------------------------------------------------------------
D* Read Directory Entry
D*
D* struct dirent *readdir(DIR *dirp)
D*--------------------------------------------------------------------
D readdir PR * EXTPROC('readdir')
D dirp * VALUE
D*--------------------------------------------------------------------
D* Close a directory
D*
D* int closedir(DIR *dirp)
D*--------------------------------------------------------------------
D closedir PR 10I 0 EXTPROC('closedir')
D dirhandle * VALUE
D*--------------------------------------------------------------------
D* Get Current Working Directory
D*
D* char *getcwd(char *buf, int size);
D*--------------------------------------------------------------------
D getcwd PR * EXTPROC('getcwd')
D buf * VALUE
D size 10I 0 VALUE
Chris Wolcott <cwolcott@xxxxxxxxxxxxxxxxxxxxxx> wrote:
I have the following RPG copybook that prototypes C library functions:
/**
* RPG Procedures definitions for accessing IFS files via C functions.
* Based on article on iSeriesNetwork.com by Jef Sutherland
* If you create an IFS file, specify 'w codepage=1252' on the open,
then
* close it and reopen with 'a codepage=37'. This will cause the
fputs()
* function to translate the data from EBCDIC to ASCII and back for
fgets().
* Open Modes and their meanings:
* 'r' Open existing file for reading - Fails if not found
* 'w' Creates empty file for writting - Clears existing file
* 'a' Open existing file for appending - Creates file if not found
* 'r+' Open existing file for reading/writing - Fails if not found
* 'w+' Creates empty file for reading/writting - Clears existing file
* 'a+' Open existing file for reading/appending - Creates file if not
found
* @version V0R0M0
* @see
http://www.iseriesnetwork.com/artarchiveImages/2004/jan/17693-fig1.html
* @see
http://www.iseriesnetwork.com/artarchiveImages/2004/jan/17693-Fig2.html
*/
D/IF NOT DEFINED(UTL_IFS)
D/DEFINE UTL_IFS
DifsOpn PR * EXTPROC( '_C_IFS_fopen' )
Open IFS file
D * VALUE OPTIONS( *String )
D * VALUE OPTIONS( *String )
DifsClo PR 10I 0 EXTPROC( '_C_IFS_fclose' )
Close IFS file
D * VALUE
DifsDlt PR 10I 0 EXTPROC( '_C_IFS_remove' )
Delete IFS file
D * VALUE OPTIONS( *String )
DifsRd PR * EXTPROC( '_C_IFS_fgets' )
Read IFS file
D * VALUE
D 10I 0 VALUE
D * VALUE
DifsWrt PR 10I 0 EXTPROC( '_C_IFS_fputs' )
Write IFS file
D * VALUE OPTIONS( *String )
D * VALUE
DifsFileErr PR 10I 0 EXTPROC( 'ferror')
Chk File Errors
D * VALUE
DifsSts PR 10I 0 EXTPROC( 'lstat' )
Get File Status
D * VALUE OPTIONS( *String )
D * VALUE
DifsEOF PR 10I 0 EXTPROC( '_C_IFS_feof' )
End of File Test
D * VALUE
D p_ifsSts S * Inz( %Addr( ifsSts_t ))
D ifsSts_t DS Align
IFS Status Structure
D st_mode 10U 0
D st_ino 10U 0
D st_nlink 5U 0
D 2A
D st_uid 10U 0
D st_gid 10U 0
D st_size 10I 0
D st_atime 10I 0
D st_mtime 10I 0
D st_ctime 10I 0
D st_dev 10U 0
D st_blksize 10U 0
D st_allocsize 10U 0
D st_objtype 11A
D 1A
D st_codepage 5U 0
D st_reserv1 62A
D st_ino_gen_id 10U 0
D/ENDIF
All was well until V5R3 (V4R5 to V5R2), now we get this during the call
to ferror() after doing an fgets():
>From program . . . . . . . . . : QC2IFS
>From library . . . . . . . . : QSYS
>From module . . . . . . . . : QC2IP124
>From procedure . . . . . . . : fp124
>From statement . . . . . . . : 38
To program . . . . . . . . . . : QC2IFS
To library . . . . . . . . . : QSYS
To module . . . . . . . . . : QC2IP124
To procedure . . . . . . . . : fp124
To statement . . . . . . . . : 38
Pointer not set for location referenced.
Function check. MCH3601 unmonitored by QC2IFS at statement
0000000038,
instruction X'0000'.
Application error. *N unmonitored by *N at statement *N,
instruction
X'4000'.
Function check. CEE9901 unmonitored by QUIMNDRV at statement *N,
instruction X'0CDE'.
Exception handler not available because of reason code 5.
Function check. CPF2524 unmonitored by QUIMNDRV at statement *N,
instruction X'0CDE'.
Any ideas? Are these functions no longer supported? I called IBM
support and he could not find ANY references to these functions at all.
Is there a better way to access the IFS from RPG?
--
This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
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Jeff Young
Sr. Programmer Analyst
Dynax Solutions, Inc.
IBM -e(logo) server Certified Systems Exper - iSeries Technical Solutions V5R2
IBM Certified Specialist- e(logo) server i5Series Technical Solutions Designer
V5R3
IBM Certified Specialist- e(logo)server i5Series Technical Solutions
Implementer V5R3
---------------------------------
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