Changes for IO.C by Andreas Scherer, January 20, 1995.

@x l.26
#if !defined(VMS) && !defined(VMS_POSIX) && !defined(_MSC_VER)
#include <sys/param.h>
#endif
#include "awk.h"
@y
#include "ansiawk.h"
@z

@x l.49
#if defined(MSDOS) || defined(OS2) || defined(atarist)
#define PIPES_SIMULATED
#endif
@y
#if defined(MSDOS) || defined(OS2) || defined(atarist) || defined(_AMIGA)
#define PIPES_SIMULATED
#endif
#ifdef _AMIGA
extern int fileno(FILE *);
extern FILE *fdopen(int, const char *);
#define _NFILE 23
#endif
@z

@x l.69
static int pidopen P((IOBUF *iop, const char *name, const char *mode));
static int useropen P((IOBUF *iop, const char *name, const char *mode));
@y
@z

@x l.376
		case Node_redirect_pipe:
			if ((rp->fp = popen(str, "w")) == NULL)
				fatal("can't open pipe (\"%s\") for output (%s)",
					str, strerror(errno));
			rp->flag |= RED_NOBUF;
			break;
@y
@z

@x l.504
	if ((rp->flag & (RED_PIPE|RED_WRITE)) == (RED_PIPE|RED_WRITE))
		status = pclose(rp->fp);
	else if (rp->fp)
@y
	if (rp->fp)
@z

@x l.649
	const char *cp, *ptr;
@y
	const char *cp;
	char *ptr;
@z

@x l.767
/* pidopen --- "open" /dev/pid, /dev/ppid, and /dev/pgrpid */
@y
#ifndef _AMIGA
/* pidopen --- "open" /dev/pid, /dev/ppid, and /dev/pgrpid */
@z

@x l.786
	return 0;
}
@y
	return 0;
}
#endif /* _AMIGA */
@z

@x l.789
/* useropen --- "open" /dev/user */
@y
#ifndef _AMIGA
/* useropen --- "open" /dev/user */
@z

@x l.838
	return 0;
}
@y
	return 0;
}
#endif /* _AMIGA */
@z

@x l.861
		{ "/dev/pid",		8,	pidopen },
		{ "/dev/ppid",		9,	pidopen },
		{ "/dev/pgrpid",	11,	pidopen },
		{ "/dev/user",		9,	useropen },
@y
@z

@x l.1056
	if ((name = tempnam(".", "pip")) == NULL)
		return NULL;
@y
	if ((name = tmpnam("pip")) == NULL)
		return NULL;
@z