*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <termios.h>
-#include <sys/ioctl.h>
-
#include "libbb.h"
/* do nothing signal handler */
-static void askpass_timeout(int ATTRIBUTE_UNUSED ignore)
+static void askpass_timeout(int UNUSED_PARAM ignore)
{
}
-char *bb_askpass(int timeout, const char * prompt)
+char* FAST_FUNC bb_ask_stdin(const char *prompt)
+{
+ return bb_ask(STDIN_FILENO, 0, prompt);
+}
+char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
{
- static char passwd[64];
+ /* Was static char[BIGNUM] */
+ enum { sizeof_passwd = 128 };
+ static char *passwd;
char *ret;
int i;
- struct sigaction sa;
- struct termios old, new;
-
- tcgetattr(STDIN_FILENO, &old);
- tcflush(STDIN_FILENO, TCIFLUSH);
-
- memset(passwd, 0, sizeof(passwd));
+ struct sigaction sa, oldsa;
+ struct termios tio, oldtio;
fputs(prompt, stdout);
- fflush(stdout);
+ fflush_all();
+ tcflush(fd, TCIFLUSH);
- tcgetattr(STDIN_FILENO, &new);
- new.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
- new.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
- tcsetattr(STDIN_FILENO, TCSANOW, &new);
+ tcgetattr(fd, &oldtio);
+ tio = oldtio;
+#if 0
+ /* Switch off UPPERCASE->lowercase conversion (never used since 198x)
+ * and XON/XOFF (why we want to mess with this??)
+ */
+# ifndef IUCLC
+# define IUCLC 0
+# endif
+ tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
+#endif
+ /* Switch off echo */
+ tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL);
+ 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) {
- sa.sa_flags = 0;
- sa.sa_handler = askpass_timeout;
- sigaction(SIGALRM, &sa, NULL);
+ sigaction_set(SIGALRM, &sa);
alarm(timeout);
}
- ret = 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 (!passwd)
+ passwd = xmalloc(sizeof_passwd);
+ ret = passwd;
+ i = 0;
+ while (1) {
+ int r = read(fd, &ret[i], 1);
+ if ((i == 0 && r == 0) /* EOF (^D) with no password */
+ || 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);
}
-
- tcsetattr(STDIN_FILENO, TCSANOW, &old);
- puts("");
- fflush(stdout);
+ sigaction_set(SIGINT, &oldsa);
+ tcsetattr(fd, TCSANOW, &oldtio);
+ bb_putchar('\n');
+ fflush_all();
return ret;
}