hard code list of plan 9 services in case they are not in /etc/services

src/lib9/readcons.c

@@ -0,0 +1,102 @@
+#include <u.h>
+#define NOPLAN9DEFINES
+#include <libc.h>
+#include <termios.h>
+#include <sys/termios.h>
+
+static int
+rawx(int fd, int echoing)
+{
+	int was;
+	static struct termios ttmode;
+
+	if(echoing == -1)
+		return -1;
+
+	if(tcgetattr(fd, &ttmode) < 0)
+		return -1;
+	was = (ttmode.c_lflag&(ECHO|ICANON));
+	ttmode.c_lflag &= ~(ECHO|ICANON);
+	ttmode.c_lflag |= echoing;
+	if(tcsetattr(fd, TCSANOW, &ttmode) < 0)
+		return -1;
+	return was;
+}
+
+char*
+readcons(char *prompt, char *def, int secret)
+{
+	int fd, n, raw;
+	char line[10];
+	char *s, *t;
+	int l;
+
+	if((fd = open("/dev/tty", ORDWR)) < 0)
+		return nil;
+
+	raw = -1;
+	if(secret){
+		raw = rawx(fd, 0);
+		if(raw == -1)
+			return nil;
+	}
+
+	if(def)
+		fprint(fd, "%s[%s]: ", prompt, def);
+	else
+		fprint(fd, "%s: ", prompt);
+
+	s = strdup("");
+	if(s == nil)
+		return nil;
+
+	for(;;){
+		n = read(fd, line, 1);
+		if(n < 0){
+		Error:
+			if(secret){
+				rawx(fd, raw);
+				write(fd, "\n", 1);
+			}
+			close(fd);
+			free(s);
+			return nil;
+		}
+		if(n > 0 && line[0] == 0x7F)
+			goto Error;
+		if(n == 0 || line[0] == 0x04 || line[0] == '\n' || line[0] == '\r'){
+			if(secret){
+				rawx(fd, raw);
+				write(fd, "\n", 1);
+			}
+			close(fd);
+			if(*s == 0 && def){
+				free(s);
+				s = strdup(def);
+			}
+			return s;
+		}
+		if(line[0] == '\b'){
+			if(strlen(s) > 0)
+				s[strlen(s)-1] = 0;
+		}else if(line[0] == 0x15){	/* ^U: line kill */
+			if(def != nil)
+				fprint(fd, "\n%s[%s]: ", prompt, def);
+			else
+				fprint(fd, "\n%s: ", prompt);
+			s[0] = 0;
+		}else{
+			l = strlen(s);
+			t = malloc(l+2);
+			if(t)
+				memmove(t, s, l);
+			memset(s, 'X', l);
+			free(s);
+			if(t == nil)
+				return nil;
+			t[l] = line[0];
+			t[l+1] = 0;
+			s = t;
+		}
+	}
+}