Import sources from 2011-03-30 iso image

1 files changed, 106 insertions, 0 deletions

diff --git a/sys/src/cmd/unix/drawterm/posix-factotum.c b/sys/src/cmd/unix/drawterm/posix-factotum.c
new file mode 100755
index 000000000..728131bb5
--- /dev/null
+++ b/sys/src/cmd/unix/drawterm/posix-factotum.c
@@ -0,0 +1,106 @@
+#include <u.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <libc.h>
+#include <auth.h>
+#include <fcall.h>
+#include <authsrv.h>
+#include <libsec.h>
+#include "drawterm.h"
+
+#undef socket
+#undef connect
+#undef getenv
+#undef access
+
+char*
+getuser(void)
+{
+	static char user[64];
+	struct passwd *pw;
+
+	pw = getpwuid(getuid());
+	if(pw == nil)
+		return "none";
+	strecpy(user, user+sizeof user, pw->pw_name);
+	return user;
+}
+/*
+ * Absent other hints, it works reasonably well to use
+ * the X11 display name as the name space identifier.
+ * This is how sam's B has worked since the early days.
+ * Since most programs using name spaces are also using X,
+ * this still seems reasonable.  Terminal-only sessions
+ * can set $NAMESPACE.
+ */
+static char*
+nsfromdisplay(void)
+{
+	char *disp, *p;
+
+	if((disp = getenv("DISPLAY")) == nil){
+		werrstr("$DISPLAY not set");
+		return nil;
+	}
+
+	/* canonicalize: xxx:0.0 => xxx:0 */
+	p = strrchr(disp, ':');
+	if(p){
+		p++;
+		while(isdigit((uchar)*p))
+			p++;
+		if(strcmp(p, ".0") == 0)
+			*p = 0;
+	}
+
+	return smprint("/tmp/ns.%s.%s", getuser(), disp);
+}
+
+char*
+getns(void)
+{
+	char *ns;
+
+	ns = getenv("NAMESPACE");
+	if(ns == nil)
+		ns = nsfromdisplay();
+	if(ns == nil){
+		werrstr("$NAMESPACE not set, %r");
+		return nil;
+	}
+	return ns;
+}
+
+int
+dialfactotum(void)
+{
+	int fd;
+	struct sockaddr_un su;
+	char *name;
+	
+	name = smprint("%s/factotum", getns());
+
+	if(name == nil || access(name, 0) < 0)
+		return -1;
+	memset(&su, 0, sizeof su);
+	su.sun_family = AF_UNIX;
+	if(strlen(name)+1 > sizeof su.sun_path){
+		werrstr("socket name too long");
+		return -1;
+	}
+	strcpy(su.sun_path, name);
+	if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0){
+		werrstr("socket: %r");
+		return -1;
+	}
+	if(connect(fd, (struct sockaddr*)&su, sizeof su) < 0){
+		werrstr("connect %s: %r", name);
+		close(fd);
+		return -1;
+	}
+
+	return lfdfd(fd);
+}
+