• Sequential File Access In Visual Basic

CHKOBJ allows you to check if the file exists, and also allows you to optionally check if you have authority to use it. For the IFS we use access API. Access can be used to check two things: whether the file exists, and whether it's accessible for reading, writing or execution.The C-language prototype for the access API looks like this: int access(const char.path, int amode); Here is how we define the prototype in RPGLE daccess PR 10I 0 extproc('access') dpathptr1. value dmode1 10I 0 value The access API returns an integer which can either be 0 if the file is accessible otherwise -1. The definition of the first parameter specifies “a pointer to the null-terminated path name.” In RPG, we are used to fixed-length strings (for example, we predefine the maximum length of character fields), but in C, the length of a string is indeterminate, and the length is based on what the content of the string is. C strings are terminated with a null value to indicate the end of the string, which you must take into account when you call C functions from RPG.

Sequential File Access In Visual Basic

Use OPTIONS(.STRING) on the definition of the parameter in the prototype, and use the%STR built in function to retrieve a string returned from a C function. The definition of the second parameter reads a lot more complicated then it actually is. A lot of the APIs written in C use a method of setting bits in a byte to indicate certain requirements. The different permutation and combination of bits are defined as named constants. The documentation tells you that the values you can specify for the second parameter are represented by one of the named constants (FOK, ROK, WOK or XOK), which are defined in the member unistd.h. Access mode flags for access.

FOK = File Exists. ROK = Read Access. WOK = Write Access. XOK = Execute or Search.

D FOK C 0 D ROK C 4 D WOK C 2 D XOK C 1 RPGLE Sample program to check existence of an IFS Object and its Read, Write and Execute authority.

RPGLE Service Program Example - iSeries. How to Call a Java Program from RPGLE. SRCFILE(your_library/source_file) SRCMBR(MATHBNDSRC) Add the Service Program to. Each program or service program is assigned an activation group when. On a 1,000,000 record file approx 26 hrs approx 2.8 hours One time 0.0981 seconds 0.0106 seconds. Create a Service Program and how to use binding directory. In the following example I am going to create RPGLE functions but in reality you can have functions in any.