HP C/iX Library Reference Manual (30026-90004)

268 Chapter5

HP C/iX Library Function Descriptions

open

If the U option is speciﬁed, the ﬁle is created with

user-label records. If

this option is not speciﬁed, the default is no user-label records.

V If the V option is speciﬁed, the ﬁle is created with an MPE variable-length

record format. If the V or Bs options are not speciﬁed, then the ﬁle is

created with an MPE ﬁxed-length record format. This option is mutually

exclusive with the Bs option.

The X option controls exclusive access ability for the ﬁle. The option

character is followed by an integer that indicates the level of exclusivity

for this open request. The levels are speciﬁed in the MPE/iX Intrinsics

Reference Manual under the FOPEN intrinsic.

NOTE

If linking with the POSIX/iX library, refer to the description of open() located

in the MPE/iX Developer's Kit Reference Manual.

Examples

The following creates or opens a ﬁxed record binary ﬁle f1 for writing with 256 byte

records, a ﬁle size of 10000 records, and a ﬁle code of 1030:

#include <fcntl.h>

int

;

= open("f1",O_WRONLY | O_CREAT | O_MPEOPTS, 0664, "b R256

s10000 F1030");

To open an existing ﬁle f1 for reading:

#include <fcntl.h>

int

;

= open("f1",O_RDONLY);