mars-nwe/examples/comm.c

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2011-11-13 00:38:57 +01:00
/*
* simple demo for a command programm which do a
* DOS <-> UNX command handling using PIPE filesystem.
* can be used with unxcomm for UNX.
*
* Can also be used under Linux for ncpfs <-> mars_nwe.
*
*/
#define ENV_UNXCOMM "UNXCOMM"
#ifdef LINUX
# define DEFAULT_COMM "/pipes/unxcomm"
# else
# define DEFAULT_COMM "p:/unxcomm"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#ifndef LINUX
# include <io.h>
#endif
#include <fcntl.h>
static int usage(char *progname)
{
fprintf(stderr, "Usage:\t%s prog [paras]\n", progname);
return(1);
}
int main(int argc, char **argv)
{
char *unxcomm=getenv("UNXCOMM");
if (NULL == unxcomm) unxcomm=DEFAULT_COMM;
if (argc > 1) {
int fdout = open(unxcomm, O_RDWR);
int fdin = dup(fdout);
if (fdout > -1 && fdin > -1) {
char **pp=argv+1;
unsigned char b=32;
int size;
int buf[512];
while(--argc) {
write(fdout, *pp, strlen(*pp));
++pp;
write(fdout, &b, 1);
}
b=0;
write(fdout, &b, 1);
close(fdout);
while (0 < (size = read(fdin, buf, sizeof(buf)))) {
write(1, buf, size);
}
close(fdin);
return(0);
} else
fprintf(stderr, "Cannot open PIPECOMMAND '%s'\n", unxcomm);
}
return(usage(argv[0]));
}