1990/0319/gnot/devdk.c (diff list | history)

1990/0315/sys/src/9/gnot/devdk.c:644,651 – 1990/0319/sys/src/9/gnot/devdk.c:644,658 (short | long | prev | next)
1990/0312		Dk *dp; int line; if(c->qid == Dcloneqid){
1990/0319		if(c->qid & CHDIR){
1990/0312		/*
1990/0319		* directories are read only */ if(omode != OREAD) error(0, Ebadarg); } else switch(STREAMTYPE(c->qid)){ case Dcloneqid: /*
1990/0312		* get an unused device and open it's control file */ dp = &dk[c->dev];
1990/0315/sys/src/9/gnot/devdk.c:665,671 – 1990/0319/sys/src/9/gnot/devdk.c:672,679
1990/0312		error(0, Enodev); streamopen(c, &dkinfo); pushq(c->stream, &urpinfo); } else if(STREAMTYPE(c->qid) == Dlistenqid){
1990/0319		break; case Dlistenqid:
1990/0312		/* * listen for a call and open the control file for the * channel on which the call arrived.
1990/0315/sys/src/9/gnot/devdk.c:675,687 – 1990/0319/sys/src/9/gnot/devdk.c:683,707
1990/0312		streamopen(c, &dkinfo); pushq(c->stream, &urpinfo); dkwindow(c); } else if(c->qid != CHDIR){
1990/0319		break; case Daddrqid: case Draddrqid: case Duserqid: case Dotherqid:
1990/0312		/*
1990/0319		* read only files */ if(omode != OREAD) error(0, Ebadarg); break; default: /*
1990/0312		* open whatever c points to, make sure it has an urp */ streamopen(c, &dkinfo); if(strcmp(c->stream->procq->next->info->name, "urp")!=0) pushq(c->stream, &urpinfo);
1990/0319		break;
1990/0312		} c->mode = openmode(omode);
1990/0315/sys/src/9/gnot/devdk.c:702,708 – 1990/0319/sys/src/9/gnot/devdk.c:722,728
1990/0312		Dk *dp; /* real closing happens in lancestclose */ if(c->qid != CHDIR)
1990/0319		if(c->stream)
1990/0312		streamclose(c); dp = &dk[c->dev];
1990/0315/sys/src/9/gnot/devdk.c:714,730 – 1990/0319/sys/src/9/gnot/devdk.c:734,753
1990/0312		long dkread(Chan *c, void *a, long n) { int t; Line *lp; t = STREAMTYPE(c->qid); if(t>=Slowqid || t==Dlineqid)
1990/0319		if(c->stream)
1990/0312		return streamread(c, a, n); if(c->qid == CHDIR) return devdirread(c, a, n, dkdir, dk[c->dev].lines, devgen);
1990/0319		if(c->qid & CHDIR){ if(c->qid == CHDIR) return devdirread(c, a, n, dkdir, dk[c->dev].lines, devgen); else return devdirread(c, a, n, dksubdir, Nsubdir, streamgen); }
1990/0312		lp = &dk[c->dev].line[STREAMID(c->qid)]; switch(t){
1990/0319		switch(STREAMTYPE(c->qid)){
1990/0312		case Daddrqid: return stringread(c, a, n, lp->addr); case Draddrqid:
1990/0315/sys/src/9/gnot/devdk.c:781,789 – 1990/0319/sys/src/9/gnot/devdk.c:804,809
1990/0312		return streamwrite(c, a, n, 0); return n; }                  if(t >= Slowqid) return streamwrite(c, a, n, 0); error(0, Eperm); }