mvsutils

Node.js interface to z/OS resources

Installation

Before installing, download and install IBM Open Enterprise SDK for Node.js 16 or higher. mvsutils v1.0.9 or higher is required for Node.js 18 or higher.

npm install mvsutils

Availble interfaces

SimpleConsoleMessage

• Arguments: String or type that can be converted to a string via ToString(). When more than one argument is provided, it will be space delimited. e.g

mvsutils.SimpleConsoleMessage("Write this to","System console") 

GetFileCcsid

• First argument: Path name of file descriptor, if path name is a number prepend with ./ to make it a string
• Returns object contains either "fd" or "file" and "ccsid", "text" or "error". e.g

fs.open("./somefile.txt","r",function (err,fd) {
    let attr = mvsutils.GetFileCcsid(fd)
    console.log("file text mode", attr.text, " file ccsid", attr.ccsid)
})

or

let attr = mvsutils.GetFileCcsid("./sometext.txt")
console.log("file text mode", attr.text, " file ccsid", attr.ccsid)

SetFileCcsid

• First argument: Path name of file descriptor, if path name is a number prepend with ./ to make it a string
• Second argument: text mode bit in file attribute, 1 or 0
• Third arguemnt: CCSID to set
• Return object contains "rc", "error" may be set

fs.open("./somefile.txt","r+",function (err,fd) {
    let result = mvsutils.SetFileCcsid(fd,1,1047)
    console.log(result.rc)
})

or

let result = mvsutils.SetFileCcsid("./somefile.txt",1,819)
console.log(result.rc)

GuessFileCcsid

Function to perform a content scan on a file descriptor or path name.

• First argument: Path name of file descriptor, if path name is a number prepend with ./ to make it a string
• Second argument: optional call back function
• Return object contains "fd" or "file", "rc", "error" may be set, "ccsid" contains best guess CCSID of the file. If the file contains well formed unicode in utf-8, "ccsid" will be set to 819 e.g

fs.open("./somefile.txt","r+",function (err,fd) {
    mvsutils.GuessFileCcsid(fd,function(obj){
        if (obj.ccsid) {
            console.log("file ccsid guessed:", obj.ccsid)
        }
    })
})

or

let result = mvsutils.GuessFileCcsid("./somefile.txt");
if (result.ccsid) {
  console.log("file ccsid: ", result.ccsid)
} else {
  console.log(result)
}

Tests

npm test

Examples

fixv6.js contains an example to fix untag files created by node.js V6 npm downloads.