fnm -- Return Filename

SYNOPSIS

 #include <lcio.h>

 char *fnm(FILE *f);

DESCRIPTION

fnm returns the filename for the stream associated with the FILE object addressed by f. The filename can be saved and used later to reopen the file.

RETURN VALUE

fnm returns the name of the external file associated with f. If f does not identify an open stream, the effect of calling fnm is unpredictable.

EXAMPLE

This example uses fnm to name the file used for stdout: 
  #include <lcio.h>
  #include <stdio.h>

  main()
  {
     printf("File name associated with stdout is %sn", fnm(stdout));

        /* Try to open stdout as a binary stream. */
     if (!freopen(fnm(stdout), "wb", stdout))
        fputs("Unable to reopen stdout.n", stderr);
     else
        puts("stdout has now been opened in binary mode. ");
  }

SEE ALSO

Copyright (c) 1998 SAS Institute Inc. Cary, NC, USA. All rights reserved.