char* FAST_FUNC bb_askpass(int timeout, const char *prompt)
{
/* Was static char[BIGNUM] */
enum { sizeof_passwd = 128 };
static char *passwd;
char *ret;
int i;
struct sigaction sa, oldsa;
struct termios tio, oldtio;
if (!passwd)
passwd = xmalloc(sizeof_passwd);
memset(passwd, 0, sizeof_passwd);
tcgetattr(STDIN_FILENO, &oldtio);
tcflush(STDIN_FILENO, TCIFLUSH);
tio = oldtio;
tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
tcsetattr(STDIN_FILENO, TCSANOW, &tio);
memset(&sa, 0, sizeof(sa));
/* sa.sa_flags = 0; - no SA_RESTART! */
/* SIGINT and SIGALRM will interrupt read below */
sa.sa_handler = askpass_timeout;
sigaction(SIGINT, &sa, &oldsa);
if (timeout) {
sigaction_set(SIGALRM, &sa);
alarm(timeout);
}
fputs(prompt, stdout);
fflush(stdout);
ret = NULL;
/* On timeout or Ctrl-C, read will hopefully be interrupted,
* and we return NULL */
if (read(STDIN_FILENO, passwd, sizeof_passwd - 1) > 0) {
ret = passwd;
i = 0;
/* Last byte is guaranteed to be 0
(read did not overwrite it) */
do {
if (passwd[i] == '\r' || passwd[i] == '\n')
passwd[i] = '\0';
} while (passwd[i++]);
}
if (timeout) {
alarm(0);
}
sigaction_set(SIGINT, &oldsa);
tcsetattr(STDIN_FILENO, TCSANOW, &oldtio);
bb_putchar('\n');
fflush(stdout);
return ret;
}
void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int))
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
/*sigemptyset(&sa.sa_mask);*/
sa.sa_flags = SA_RESTART;
sa.sa_handler = handler;
sigaction_set(sig, &sa);
}
void bb_signals_recursive(int sigs, void (*f)(int))
{
int sig_no = 0;
int bit = 1;
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = f;
/*sa.sa_flags = 0;*/
/*sigemptyset(&sa.sa_mask); - hope memset did it*/
while (sigs) {
if (sigs & bit) {
sigs &= ~bit;
sigaction_set(sig_no, &sa);
}
sig_no++;
bit <<= 1;
}
}
char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
{
/* Was static char[BIGNUM] */
enum { sizeof_passwd = 128 };
static char *passwd;
char *ret;
int i;
struct sigaction sa, oldsa;
struct termios tio, oldtio;
tcgetattr(fd, &oldtio);
tcflush(fd, TCIFLUSH);
tio = oldtio;
#ifndef IUCLC
# define IUCLC 0
#endif
tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
tcsetattr(fd, TCSANOW, &tio);
memset(&sa, 0, sizeof(sa));
/* sa.sa_flags = 0; - no SA_RESTART! */
/* SIGINT and SIGALRM will interrupt reads below */
sa.sa_handler = askpass_timeout;
sigaction(SIGINT, &sa, &oldsa);
if (timeout) {
sigaction_set(SIGALRM, &sa);
alarm(timeout);
}
fputs(prompt, stdout);
fflush_all();
if (!passwd)
passwd = xmalloc(sizeof_passwd);
ret = passwd;
i = 0;
while (1) {
int r = read(fd, &ret[i], 1);
if (r < 0) {
/* read is interrupted by timeout or ^C */
ret = NULL;
break;
}
if (r == 0 /* EOF */
|| ret[i] == '\r' || ret[i] == '\n' /* EOL */
|| ++i == sizeof_passwd-1 /* line limit */
) {
ret[i] = '\0';
break;
}
}
if (timeout) {
alarm(0);
}
sigaction_set(SIGINT, &oldsa);
tcsetattr(fd, TCSANOW, &oldtio);
bb_putchar('\n');
fflush_all();
return ret;
}
