*
* 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 "libbb.h"
struct sigaction sa, oldsa;
struct termios tio, oldtio;
- if (!passwd)
- passwd = xmalloc(sizeof_passwd);
- memset(passwd, 0, sizeof_passwd);
+ fputs(prompt, stdout);
+ fflush_all();
+ tcflush(fd, TCIFLUSH);
tcgetattr(fd, &oldtio);
- tcflush(fd, TCIFLUSH);
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);
- tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
- tcsetattr_stdin_TCSANOW(&tio);
+#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 read below */
+ /* SIGINT and SIGALRM will interrupt reads below */
sa.sa_handler = askpass_timeout;
sigaction(SIGINT, &sa, &oldsa);
if (timeout) {
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(fd, 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);
}
sigaction_set(SIGINT, &oldsa);
-
- tcsetattr_stdin_TCSANOW(&oldtio);
+ tcsetattr(fd, TCSANOW, &oldtio);
bb_putchar('\n');
- fflush(stdout);
+ fflush_all();
return ret;
}