Import sources from 2011-03-30 iso image

sys/src/cmd/auth/lib/readln.c

@@ -0,0 +1,115 @@
+#include <u.h>
+#include <libc.h>
+#include <authsrv.h>
+#include <bio.h>
+#include "authcmdlib.h"
+
+void
+getpass(char *key, char *pass, int check, int confirm)
+{
+	char rpass[32], npass[32];
+	char *err;
+
+	if(pass == nil)
+		pass = npass;
+
+	for(;;){
+		readln("Password: ", pass, sizeof npass, 1);
+		if(confirm){
+			readln("Confirm password: ", rpass, sizeof rpass, 1);
+			if(strcmp(pass, rpass) != 0){
+				print("mismatch, try again\n");
+				continue;
+			}
+		}
+		if(!passtokey(key, pass)){
+			print("bad password, try again\n");
+			continue;
+		}
+		if(check)
+			if(err = okpasswd(pass)){
+				print("%s, try again\n", err);
+				continue;
+			}
+		break;
+	}
+}
+
+int
+getsecret(int passvalid, char *p9pass)
+{
+	char answer[32];
+
+	readln("assign Inferno/POP secret? (y/n) ", answer, sizeof answer, 0);
+	if(*answer != 'y' && *answer != 'Y')
+		return 0;
+
+	if(passvalid){
+		readln("make it the same as the plan 9 password? (y/n) ",
+			answer, sizeof answer, 0);
+		if(*answer == 'y' || *answer == 'Y')
+			return 1;
+	}
+
+	for(;;){
+		readln("Secret(0 to 256 characters): ", p9pass,
+			sizeof answer, 1);
+		readln("Confirm: ", answer, sizeof answer, 1);
+		if(strcmp(p9pass, answer) == 0)
+			break;
+		print("mismatch, try again\n");
+	}
+	return 1;
+}
+
+void
+readln(char *prompt, char *line, int len, int raw)
+{
+	char *p;
+	int fdin, fdout, ctl, n, nr;
+
+	fdin = open("/dev/cons", OREAD);
+	fdout = open("/dev/cons", OWRITE);
+	fprint(fdout, "%s", prompt);
+	if(raw){
+		ctl = open("/dev/consctl", OWRITE);
+		if(ctl < 0)
+			error("couldn't set raw mode");
+		write(ctl, "rawon", 5);
+	} else
+		ctl = -1;
+	nr = 0;
+	p = line;
+	for(;;){
+		n = read(fdin, p, 1);
+		if(n < 0){
+			close(ctl);
+			error("can't read cons\n");
+		}
+		if(*p == 0x7f)
+			exits(0);
+		if(n == 0 || *p == '\n' || *p == '\r'){
+			*p = '\0';
+			if(raw){
+				write(ctl, "rawoff", 6);
+				write(fdout, "\n", 1);
+			}
+			close(ctl);
+			return;
+		}
+		if(*p == '\b'){
+			if(nr > 0){
+				nr--;
+				p--;
+			}
+		}else{
+			nr++;
+			p++;
+		}
+		if(nr == len){
+			fprint(fdout, "line too long; try again\n");
+			nr = 0;
+			p = line;
+		}
+	}
+}