make echo -e "foo\nfoo" | passwd USER work
Suggested by Michael Zhu (linuxsir320 AT gmail.com) function old new delta bb_ask 333 340 +7 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -30,10 +30,6 @@ char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
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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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@ -46,7 +42,7 @@ char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
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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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/* SIGINT and SIGALRM will interrupt reads 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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@ -56,18 +52,26 @@ char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
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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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if (!passwd)
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passwd = xmalloc(sizeof_passwd);
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memset(passwd, 0, sizeof_passwd);
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ret = passwd;
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i = 0;
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while (1) {
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int r = read(fd, &ret[i], 1);
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if (r < 0) {
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/* read is interrupted by timeout or ^C */
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ret = NULL;
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break;
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}
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if (r == 0 /* EOF */
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|| ret[i] == '\r' || ret[i] == '\n' /* EOL */
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|| ++i == sizeof_passwd-1 /* line limit */
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) {
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ret[i] = '\0';
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break;
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}
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}
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if (timeout) {
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