CF: Problem with crossedit under SGI IRIX 5.3

["Paul Mikell" <pmikell@rare.co.uk>]

When a compressed map is saved, crossedit becomes unable to load any more
compressed maps, because the uncompress commands are spawned with their
standard output file descriptors closed. This appears to be caused by a bug in
the standard library's implementation of "popen". Adding the following code to
map.c after #include <unistd.h> at line 34 should solve the problem:

#if defined(sgi)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define popen fixed_popen

FILE *fixed_popen(const char *command, const char *type)
{
	int		fd[2];
	int		pd;
	FILE	*ret;
	if (!strcmp(type,"r"))
	{
		pd=STDOUT_FILENO;
	}
	else if (!strcmp(type,"w"))
	{
		pd=STDIN_FILENO;
	}
	else
	{
		return NULL;
	}
	if (pipe(fd)!=-1)
	{
		switch (fork())
		{
		case -1:
			close(fd[0]);
			close(fd[1]);
			break;
		case 0:
			close(fd[0]);
			if ((fd[1]==pd)||(dup2(fd[1],pd)==pd))
			{
				if (fd[1]!=pd)
				{
					close(fd[1]);
				}
				execl("/bin/sh","sh","-c",command,NULL);
				close(pd);
			}
			exit(1);
			break;
		default:
			close(fd[1]);
			if (ret=fdopen(fd[0],type))
			{
				return ret;
			}
			close(fd[0]);
			break;
		}
	}
	return NULL;
}

#endif /* defined(sgi) */

-- 
Paul Mikell
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