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From: nyse@nicedel.north.de (Hermann Behrens)
Newsgroups: comp.lang.c,comp.unix.sysv386
Subject: How to execute 'sz' and 'rc' ?
Message-ID: <1991Apr29.221812.5038@nicedel.north.de>
Date: 29 Apr 91 22:18:12 GMT
Organization: NICE DELmenhorst, FRG
Lines: 53

Hello.
I have problems to execute an external protocoll, in this case zmodem.
I open the device, let the programm call a mailbox(up to this point no
problems), but when i have to execute the sz, i get errors :-(

this is my routine to start sz:

int	zm_upload()
{
	int	pid, status;

	chdir("/somewhere");
	if((pid = fork()) == 0)  {
		close(fp);
		close(0);
		open("/dev/ttyF00", O_RDONLY | O_NDELAY);

		close(1);
		open("/dev/ttyF00", O_WRONLY | O_NDELAY);

/* I think, that the bug is in the redirecting of stdin and stdout,
but where is the bug?? */

		execl("/bin/sh", "sh", "-c", "sz a_file",NULL);
	}
	else
		wait(&status);
}

int	zm_download()
{
	int	pid, status;

	chdir("/somewhere");
	if((pid = fork()) == 0) {
		close(fp);
		close(0);
		open("/dev/ttyF00", O_RDONLY | O_NDELAY);

		close(1);
		open("/dev/ttyF00", O_RDONLY | O_NDELAY);

		execl("/bin/sh", "sh", "-c", "rz", NULL);
	}
	else
		wait(&status);
}

It would be great, if someone could help me ...

ciao, Hermann Behrens
-- 
Hermann Behrens|Bremerstr. 323|2870 Delmenhorst|04221/71931(DATA)71932(VOICE)