8131eea3dc
function old new delta buffer_fill_and_print 179 196 +17 fflush_all - 9 +9 spawn 87 92 +5 rtcwake_main 455 453 -2 ... alarm_intr 93 84 -9 readcmd 1072 1062 -10 bb_ask 345 333 -12 more_main 845 832 -13 flush_stdout_stderr 42 23 -19 xfflush_stdout 27 - -27 flush_stderr 30 - -30 ------------------------------------------------------------------------------ (add/remove: 1/2 grow/shrink: 2/50 up/down: 31/-397) Total: -366 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Ask for a password
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* I use a static buffer in this function. Plan accordingly.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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/* do nothing signal handler */
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static void askpass_timeout(int UNUSED_PARAM ignore)
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{
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}
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char* FAST_FUNC bb_ask_stdin(const char *prompt)
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{
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return bb_ask(STDIN_FILENO, 0, prompt);
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}
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char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
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{
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/* Was static char[BIGNUM] */
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enum { sizeof_passwd = 128 };
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static char *passwd;
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char *ret;
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int i;
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struct sigaction sa, oldsa;
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struct termios tio, oldtio;
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if (!passwd)
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passwd = xmalloc(sizeof_passwd);
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memset(passwd, 0, sizeof_passwd);
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tcgetattr(fd, &oldtio);
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tcflush(fd, TCIFLUSH);
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tio = oldtio;
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#ifndef IUCLC
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# define IUCLC 0
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#endif
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tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
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tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
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tcsetattr_stdin_TCSANOW(&tio);
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memset(&sa, 0, sizeof(sa));
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/* sa.sa_flags = 0; - no SA_RESTART! */
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/* SIGINT and SIGALRM will interrupt read below */
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sa.sa_handler = askpass_timeout;
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sigaction(SIGINT, &sa, &oldsa);
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if (timeout) {
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sigaction_set(SIGALRM, &sa);
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alarm(timeout);
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}
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fputs(prompt, stdout);
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fflush_all();
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ret = NULL;
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/* On timeout or Ctrl-C, read will hopefully be interrupted,
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* and we return NULL */
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if (read(fd, passwd, sizeof_passwd - 1) > 0) {
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ret = passwd;
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i = 0;
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/* Last byte is guaranteed to be 0
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(read did not overwrite it) */
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do {
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if (passwd[i] == '\r' || passwd[i] == '\n')
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passwd[i] = '\0';
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} while (passwd[i++]);
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}
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if (timeout) {
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alarm(0);
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}
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sigaction_set(SIGINT, &oldsa);
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tcsetattr_stdin_TCSANOW(&oldtio);
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bb_putchar('\n');
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fflush_all();
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return ret;
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}
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