ref: 41e27b2d10c6a60c49931332e8677438736a1e36
dir: /os/boot/puma/console.c/
#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" static Queue* consiq; static Queue* consoq; void bothputs(char *s, int n) { uartputs(s, n); // cgascreenputs(s, n); } static void (*consputs)(char*, int) = 0; void consinit(void) { char *p; int baud, port; static int cgadone; if((p = getconf("console")) == 0 || strcmp(p, "lcd") == 0 || strcmp(p, "screen") == 0){ consiq = qopen(4*1024, 0, 0, 0); consoq = qopen(8*1024, 0, 0, 0); consputs = uartputs; if(!cgadone) { cgadone = 1; //screeninit(); //kbdinit(); port = 1; baud = 9600; uartspecial(port, baud, &consiq, &consoq, kbdchar); } return; } if(0 || strstr(p, "lcd") == 0) consputs = bothputs; else consputs = uartputs; port = strtoul(p, 0, 0); baud = 0; if(p = getconf("baud")) baud = strtoul(p, 0, 0); if(baud == 0) baud = 9600; uartspecial(port, baud, &consiq, &consoq, kbdchar); } void kbdchar(Queue *q, int c) { c &= 0x7F; if(c == 0x10) panic("^p"); if(q == 0) { if(consiq != 0) qbputc(consiq, c); } else qbputc(q, c); } static int getline(char *buf, int size, int dotimeout) { int c, i=0; ulong start; char echo; for (;;) { start = m->ticks; do{ if(dotimeout && ((m->ticks - start) > 5*HZ)) return -2; c = qbgetc(consiq); }while(c == -1); if(c == '\r') c = '\n'; /* turn carriage return into newline */ if(c == '\177') c = '\010'; /* turn delete into backspace */ if(c == '\025') echo = '\n'; /* echo ^U as a newline */ else echo = c; (*consputs)(&echo, 1); if(c == '\010'){ if(i > 0) i--; /* bs deletes last character */ continue; } /* a newline ends a line */ if (c == '\n') break; /* ^U wipes out the line */ if (c =='\025') return -1; if(i == size) return size; buf[i++] = c; } buf[i] = 0; return i; } int getstr(char *prompt, char *buf, int size, char *def) { int len, isdefault; buf[0] = 0; isdefault = (def && *def); for (;;) { if(isdefault) print("%s[default==%s]: ", prompt, def); else print("%s: ", prompt); len = getline(buf, size, isdefault); switch(len){ case -1: /* ^U typed */ continue; case -2: /* timeout, use default */ (*consputs)("\n", 1); len = 0; break; default: break; } if(len >= size){ print("line too long\n"); continue; } break; } if(len == 0 && isdefault) strcpy(buf, def); return 0; } int sprint(char *s, char *fmt, ...) { return donprint(s, s+PRINTSIZE, fmt, (&fmt+1)) - s; } int print(char *fmt, ...) { char buf[PRINTSIZE]; int n; if(consputs == 0) return 0; n = donprint(buf, buf+sizeof(buf), fmt, (&fmt+1)) - buf; (*consputs)(buf, n); return n; } void panic(char *fmt, ...) { char buf[PRINTSIZE]; int n; if(consputs){ (*consputs)("panic: ", 7); n = donprint(buf, buf+sizeof(buf), fmt, (&fmt+1)) - buf; (*consputs)(buf, n); (*consputs)("\n", 1); } spllo(); for(;;) idle(); }