ILE C considerations

These topics summarize considerations for using the ILE C programming language to access remote VSAM data sets from an iSeries™ server.

Because ILE C programming language supports only sequential I/O, open operations will fail if KSDS or VSAM paths are opened.

This topic shows the open mode considerations when using ILE C programming language.

Table 1. Use ILE C programming language to open a CICS^® file
ILE C open mode	VSAM data set organization
ILE C open mode	ESDS	RRDS	KSDS	VSAM Path
r, rb	X	X	X	X
w, wb	E	E	E	E
w+, wb+, w+b, a+, ab+, a+b, r+, rb+, r+b, a, ab	X	X	X	E
a, ab	X	—	—	—
Where: X Open mode is allowed. E Open mode is allowed by ILE C programming language, but the open fails when accessing the VSAM data set. — Open mode is not applicable.