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

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160 Chapter5

HP C/iX Library Function Descriptions

fopen

speciﬁed. The default for text and binary streams is 256 bytes. The default

for byte streams is 1 byte.

The S option speciﬁes the maximum size of the ﬁle. The value of

is the

maximum size of the ﬁle in records for text and binary streams, and in

bytes for byte streams. Notice that if the S parameter is not speciﬁed, the

default is 4095.

Te If the Te option is speciﬁed, the ﬁle is saved in the temporary ﬁle domain.

If the Te option is not speciﬁed and the ﬁle is a new ﬁle, the default is to

save the ﬁle as a permanent ﬁle. If the ﬁle is old, the default is to not

change the disposition.

Tm If the Tm option is speciﬁed, disk read functions trim editor line numbers, if

they exist, and trailing blanks from each record of an ASCII ﬁxed record

length ﬁle before returning ﬁle data to the reader. This option is used on

ﬁles opened with read only access. Random access to ﬁle data using

fseek() and lseek() is not permitted. The default is to not trim editor

line numbers and blanks.

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 Intrinsics

Reference Manual under the FOPEN speciﬁcation.

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

records, a ﬁle size of 1000 records, and a ﬁle code of 1030:

#include stdio.h>

FILE *

stream

;

stream

= fopen("

filename

","wb R256 S1000 F1030");