#include #define NOPLAN9DEFINES #include #include #ifdef HAS_SYS_TERMIOS #include #endif 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; } } }