How to Convince Z/Os Scp to Transfer Binary Files

How can I convince z/OS scp to transfer binary files?

You can use one of the other SSH-based tools such as sftp.

Whereas scp will let you transfer a file (with automatic authentication set up) with something like:

scp -i ident_file zos_file linux_user@linux_box:linux_file

you can do a similar thing with the secure FTP:

sftp IdentityFile=ident_file -b - linux_user@linux_box <<EOF
    binary
    put zos_file linux_file
EOF

equivalent of ftp put and append in scp

Put is just the normal scp

scp /path/to/source user@host:/path/to/target

Append only works with a little hack (and not with scp directly)

cat source | ssh user@host "cat >> /path/to/target"

Merging EBCDIC converted files and pdf files into a single file and pushing to mainframes

File merging could easily be achieved by using Cat command in unix with > and >> append operators.

Also, if the next file should start from a new line (as was my case) a blank echo could be inserted between files.

How can I determine which security manager is active on z/OS using Java?

You can use the IBM JZOS package to peek at memory as follows. For production code, I would create an enumeration for the security managers and rather than pass strings around and have to deal with string comparisons.

import com.ibm.jzos.ZUtil;

/**
 * This is a sample program that uses IBM JZOS to determine
 * the Enterprise Security Manager that is active on a z/OS
 * system.
 * <p>
 * @see com.ibm.jzos.ZUtil#peekOSMemory(long, int)
 * @see com.ibm.jzos.ZUtil#peekOSMemory(long, byte[])
 */
public class peek {

    public static void main(String[] args) throws Exception {

        byte[] rcvtIdBytes = new byte[4];
        long pPSA  = 0L;
        int psaOffsetCVT = 16;
        long pCVT  = ZUtil.peekOSMemory(pPSA + psaOffsetCVT, 4); // Get address of CVT from PSA+16

        int cvtOffsetCVTRAC = 0x3e0;                             // Offset of CVTRAC (@RCVT) in the CVT
        long pCVTRAC =
                ZUtil.peekOSMemory(pCVT + cvtOffsetCVTRAC, 4);   // Get the address of CVTRAC (Mapped by ICHPRCVT)

        // Now we can retrieve the 4 byte ID (in IBM-1047) of the active ESM.
        int cvtracOffsetRCVTID = 0x45;                                   // Offset of RCVTID in the RCVT
        ZUtil.peekOSMemory(pCVTRAC + cvtracOffsetRCVTID, rcvtIdBytes);   // Get the RCVTID

        String rcvtId = new String(rcvtIdBytes, "IBM-1047");

        System.out.println("The Security Manager is: "+rcvtId);
    }
}

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