SYSOUT

A C program can use SYSOUT as follows:

• An open function (fopen/fopen64, freopen/freopen64, open/open64) is used to open a file with the name "(SYSOUT)" or "(SYSTERM)" for writing. The file pointer returned by the open function then serves as an argument for a subsequent input function.

  Example

  FILE *fp;
  fp = fopen("(SYSTERM)", "w");
  fputc(fp);
  

• For output functions, the file pointer

  stdout or the file descriptor 1 is specified as the file argument.

  Examples

  fputc(stdout);

  write(1, buf, n);

• In this case, the file pointer stderr or the file descriptor 2 is specified as the file argument for output functions.

• Output functions that write to stdout/stderr by default (e.g. printf, puts, putchar or perror) are used.

If a parameter line was requested with PARAMETER-PROMPTING=YES (in the RUNTIME-OPTIONS compiler option), this parameter line can be used to redirect the standard output (file pointer stdout or file descriptor 1) and the standard error output (file pointer stderr or file descriptor 2) to a cataloged file. Please refer to your C and C++ User Guides.

This reassignment has no effect on files that were opened with the name "(SYSOUT)" or "(SYSTERM)".