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- #include <u.h>
- #include <libc.h>
- #include <../boot/boot.h>
- void
- getpasswd(char *p, int len)
- {
- char c;
- int i, n, fd;
- fd = open("#c/consctl", OWRITE);
- if(fd < 0)
- fatal("can't open consctl; please reboot");
- write(fd, "rawon", 5);
- Prompt:
- print("password: ");
- n = 0;
- for(;;){
- do{
- i = read(0, &c, 1);
- if(i < 0)
- fatal("can't read cons; please reboot");
- }while(i == 0);
- switch(c){
- case '\n':
- p[n] = '\0';
- close(fd);
- print("\n");
- return;
- case '\b':
- if(n > 0)
- n--;
- break;
- case 'u' - 'a' + 1: /* cntrl-u */
- print("\n");
- goto Prompt;
- default:
- if(n < len - 1)
- p[n++] = c;
- break;
- }
- }
- }
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