53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
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/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <libc.h>
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#include "../boot/boot.h"
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void
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getpasswd(char *p, int len)
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{
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char c;
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int i, n, fd;
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fd = open("#c/consctl", OWRITE);
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if(fd < 0)
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fatal("can't open consctl; please reboot");
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write(fd, "rawon", 5);
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Prompt:
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print("password: ");
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n = 0;
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for(;;){
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do{
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i = read(0, &c, 1);
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if(i < 0)
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fatal("can't read cons; please reboot");
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}while(i == 0);
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switch(c){
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case '\n':
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p[n] = '\0';
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close(fd);
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print("\n");
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return;
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case '\b':
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if(n > 0)
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n--;
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break;
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case 'u' - 'a' + 1: /* cntrl-u */
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print("\n");
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goto Prompt;
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default:
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if(n < len - 1)
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p[n++] = c;
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break;
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}
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}
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}
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