Initial revision

src/cmd/samterm/plan9.c

@@ -0,0 +1,296 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <thread.h>
+#include <mouse.h>
+#include <cursor.h>
+#include <keyboard.h>
+#include <frame.h>
+#include "flayer.h"
+#include "samterm.h"
+
+static char exname[64];
+
+void
+getscreen(int argc, char **argv)
+{
+	char *t;
+
+	USED(argc);
+	USED(argv);
+	if(initdraw(panic1, nil, "sam") < 0){
+		fprint(2, "samterm: initimage: %r\n");
+		threadexitsall("init");
+	}
+	t = getenv("tabstop");
+	if(t != nil)
+		maxtab = strtoul(t, nil, 0);
+	draw(screen, screen->clipr, display->white, nil, ZP);
+}
+
+int
+screensize(int *w, int *h)
+{
+	int fd, n;
+	char buf[5*12+1];
+
+	fd = open("/dev/screen", OREAD);
+	if(fd < 0)
+		return 0;
+	n = read(fd, buf, sizeof(buf)-1);
+	close(fd);
+	if (n != sizeof(buf)-1)
+		return 0;
+	buf[n] = 0;
+	if (h) {
+		*h = atoi(buf+4*12)-atoi(buf+2*12);
+		if (*h < 0)
+			return 0;
+	}
+	if (w) {
+		*w = atoi(buf+3*12)-atoi(buf+1*12);
+		if (*w < 0)
+			return 0;
+	}
+	return 1;
+}
+
+int
+snarfswap(char *fromsam, int nc, char **tosam)
+{
+	char *s1;
+	int f, n, ss;
+
+	f = open("/dev/snarf", 0);
+	if(f < 0)
+		return -1;
+	ss = SNARFSIZE;
+	if(hversion < 2)
+		ss = 4096;
+	*tosam = s1 = alloc(ss);
+	n = read(f, s1, ss-1);
+	close(f);
+	if(n < 0)
+		n = 0;
+	if (n == 0) {
+		*tosam = 0;
+		free(s1);
+	} else
+		s1[n] = 0;
+/*
+	f = create("/dev/snarf", 1, 0666);
+	if(f >= 0){
+		write(f, fromsam, nc);
+		close(f);
+	}
+*/
+	return n;
+}
+
+void
+dumperrmsg(int count, int type, int count0, int c)
+{
+	fprint(2, "samterm: host mesg: count %d %ux %ux %ux %s...ignored\n",
+		count, type, count0, c, rcvstring());
+}
+
+void
+removeextern(void)
+{
+	remove(exname);
+}
+
+Readbuf	hostbuf[2];
+/*
+Readbuf	plumbbuf[2];
+
+void
+extproc(void *argv)
+{
+	Channel *c;
+	int i, n, which, *fdp;
+	void **arg;
+
+	arg = argv;
+	c = arg[0];
+	fdp = arg[1];
+
+	i = 0;
+	for(;;){
+		i = 1-i;	/ * toggle * /
+		n = read(*fdp, plumbbuf[i].data, sizeof plumbbuf[i].data);
+		if(n <= 0){
+			fprint(2, "samterm: extern read error: %r\n");
+			threadexits("extern");	/ * not a fatal error * /
+		}
+		plumbbuf[i].n = n;
+		which = i;
+		send(c, &which);
+	}
+}
+*/
+
+void
+extstart(void)
+{
+	char buf[32];
+	int fd;
+	static int p[2];
+	static void *arg[2];
+
+return;
+	if(pipe(p) < 0)
+		return;
+	sprint(exname, "/srv/sam.%s", "rsc"/*getuser()*/);
+	fd = open(exname, 1, 0600);/* BUG was create */
+	if(fd < 0){	/* assume existing guy is more important */
+    Err:
+		close(p[0]);
+		close(p[1]);
+		return;
+	}
+	sprint(buf, "%d", p[0]);
+	if(write(fd, buf, strlen(buf)) <= 0)
+		goto Err;
+	close(fd);
+	/*
+	 * leave p[0] open so if the file is removed the event
+	 * library won't get an error
+	 */
+#if 0
+	plumbc = chancreate(sizeof(int), 0);
+	arg[0] = plumbc;
+	arg[1] = &p[1];
+	proccreate(extproc, arg, 1024);
+#endif
+	atexit(removeextern);
+}
+
+#if 0
+int
+plumbformat(int i)
+{
+	Plumbmsg *m;
+	char *addr, *data, *act;
+	int n;
+
+	data = (char*)plumbbuf[i].data;
+	m = plumbunpack(data, plumbbuf[i].n);
+	if(m == nil)
+		return 0;
+	n = m->ndata;
+	if(n == 0){
+		plumbfree(m);
+		return 0;
+	}
+	act = plumblookup(m->attr, "action");
+	if(act!=nil && strcmp(act, "showfile")!=0){
+		/* can't handle other cases yet */
+		plumbfree(m);
+		return 0;
+	}
+	addr = plumblookup(m->attr, "addr");
+	if(addr){
+		if(addr[0] == '\0')
+			addr = nil;
+		else
+			addr = strdup(addr);	/* copy to safe storage; we'll overwrite data */
+	}
+	memmove(data, "B ", 2);	/* we know there's enough room for this */
+	memmove(data+2, m->data, n);
+	n += 2;
+	if(data[n-1] != '\n')
+		data[n++] = '\n';
+	if(addr != nil){
+		if(n+strlen(addr)+1+1 <= READBUFSIZE)
+			n += sprint(data+n, "%s\n", addr);
+		free(addr);
+	}
+	plumbbuf[i].n = n;
+	plumbfree(m);
+	return 1;
+}
+
+void
+plumbproc(void *argv)
+{
+	Channel *c;
+	int i, n, which, *fdp;
+	void **arg;
+
+	arg = argv;
+	c = arg[0];
+	fdp = arg[1];
+
+	i = 0;
+	for(;;){
+		i = 1-i;	/* toggle */
+		n = read(*fdp, plumbbuf[i].data, READBUFSIZE);
+		if(n <= 0){
+			fprint(2, "samterm: plumb read error: %r\n");
+			threadexits("plumb");	/* not a fatal error */
+		}
+		plumbbuf[i].n = n;
+		if(plumbformat(i)){
+			which = i;
+			send(c, &which);
+		}
+	}
+}
+
+int
+plumbstart(void)
+{
+	static int fd;
+	static void *arg[2];
+
+	plumbfd = plumbopen("send", OWRITE|OCEXEC);	/* not open is ok */
+	fd = plumbopen("edit", OREAD|OCEXEC);
+	if(fd < 0)
+		return -1;
+	plumbc = chancreate(sizeof(int), 0);
+	if(plumbc == nil){
+		close(fd);
+		return -1;
+	}
+	arg[0] =plumbc;
+	arg[1] = &fd;
+	proccreate(plumbproc, arg, 4096);
+	return 1;
+}
+#endif
+
+int
+plumbstart(void)
+{
+	return -1;
+}
+
+void
+hostproc(void *arg)
+{
+	Channel *c;
+	int i, n, which;
+
+	c = arg;
+
+	i = 0;
+	for(;;){
+		i = 1-i;	/* toggle */
+		n = read(0, hostbuf[i].data, sizeof hostbuf[i].data);
+		if(n <= 0){
+			fprint(2, "samterm: host read error: %r\n");
+			threadexitsall("host");
+		}
+		hostbuf[i].n = n;
+		which = i;
+		send(c, &which);
+	}
+}
+
+void
+hoststart(void)
+{
+	hostc = chancreate(sizeof(int), 0);
+	proccreate(hostproc, hostc, 1024);
+}