summaryrefslogtreecommitdiff
path: root/lib/replace/getpass.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/replace/getpass.c')
-rw-r--r--lib/replace/getpass.c222
1 files changed, 222 insertions, 0 deletions
diff --git a/lib/replace/getpass.c b/lib/replace/getpass.c
new file mode 100644
index 0000000000..0be618fc91
--- /dev/null
+++ b/lib/replace/getpass.c
@@ -0,0 +1,222 @@
+/* Copyright (C) 1992-1998 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public License as
+published by the Free Software Foundation; either version 3 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, see <http://www.gnu.org/licenses/>. */
+
+/* Modified to use with samba by Jeremy Allison, 8th July 1995. */
+
+#include "replace.h"
+#include "system/filesys.h"
+#include "system/wait.h"
+#include "system/terminal.h"
+#include "system/passwd.h"
+
+/*
+ * Define additional missing types
+ */
+#ifndef HAVE_SIG_ATOMIC_T_TYPE
+typedef int sig_atomic_t;
+#endif
+
+#ifndef SIGCLD
+#define SIGCLD SIGCHLD
+#endif
+
+#ifndef SIGNAL_CAST
+#define SIGNAL_CAST (RETSIGTYPE (*)(int))
+#endif
+
+#ifdef SYSV_TERMIO
+
+/* SYSTEM V TERMIO HANDLING */
+
+static struct termio t;
+
+#define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
+#define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
+#define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
+
+#ifndef TCSAFLUSH
+#define TCSAFLUSH 1
+#endif
+
+#ifndef TCSANOW
+#define TCSANOW 0
+#endif
+
+static int tcgetattr(int fd, struct termio *_t)
+{
+ return ioctl(fd, TCGETA, _t);
+}
+
+static int tcsetattr(int fd, int flags, struct termio *_t)
+{
+ if(flags & TCSAFLUSH)
+ ioctl(fd, TCFLSH, TCIOFLUSH);
+ return ioctl(fd, TCSETS, _t);
+}
+
+#elif !defined(TCSAFLUSH)
+
+/* BSD TERMIO HANDLING */
+
+static struct sgttyb t;
+
+#define ECHO_IS_ON(t) ((t).sg_flags & ECHO)
+#define TURN_ECHO_OFF(t) ((t).sg_flags &= ~ECHO)
+#define TURN_ECHO_ON(t) ((t).sg_flags |= ECHO)
+
+#define TCSAFLUSH 1
+#define TCSANOW 0
+
+static int tcgetattr(int fd, struct sgttyb *_t)
+{
+ return ioctl(fd, TIOCGETP, (char *)_t);
+}
+
+static int tcsetattr(int fd, int flags, struct sgttyb *_t)
+{
+ return ioctl(fd, TIOCSETP, (char *)_t);
+}
+
+#else /* POSIX TERMIO HANDLING */
+#define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
+#define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
+#define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
+
+static struct termios t;
+#endif /* SYSV_TERMIO */
+
+static void catch_signal(int signum,void (*handler)(int ))
+{
+#ifdef HAVE_SIGACTION
+ struct sigaction act;
+ struct sigaction oldact;
+
+ memset(&act, 0, sizeof(act));
+
+ act.sa_handler = handler;
+#ifdef SA_RESTART
+ /*
+ * We *want* SIGALRM to interrupt a system call.
+ */
+ if(signum != SIGALRM)
+ act.sa_flags = SA_RESTART;
+#endif
+ sigemptyset(&act.sa_mask);
+ sigaddset(&act.sa_mask,signum);
+ sigaction(signum,&act,&oldact);
+#else /* !HAVE_SIGACTION */
+ /* FIXME: need to handle sigvec and systems with broken signal() */
+ signal(signum, handler);
+#endif
+}
+
+static sig_atomic_t gotintr;
+static int in_fd = -1;
+
+/***************************************************************
+ Signal function to tell us were ^C'ed.
+****************************************************************/
+
+static void gotintr_sig(void)
+{
+ gotintr = 1;
+ if (in_fd != -1)
+ close(in_fd); /* Safe way to force a return. */
+ in_fd = -1;
+}
+
+char *rep_getpass(const char *prompt)
+{
+ FILE *in, *out;
+ int echo_off;
+ static char buf[256];
+ static size_t bufsize = sizeof(buf);
+ size_t nread;
+
+ /* Catch problematic signals */
+ catch_signal(SIGINT, SIGNAL_CAST gotintr_sig);
+
+ /* Try to write to and read from the terminal if we can.
+ If we can't open the terminal, use stderr and stdin. */
+
+ in = fopen ("/dev/tty", "w+");
+ if (in == NULL) {
+ in = stdin;
+ out = stderr;
+ } else {
+ out = in;
+ }
+
+ setvbuf(in, NULL, _IONBF, 0);
+
+ /* Turn echoing off if it is on now. */
+
+ if (tcgetattr (fileno (in), &t) == 0) {
+ if (ECHO_IS_ON(t)) {
+ TURN_ECHO_OFF(t);
+ echo_off = tcsetattr (fileno (in), TCSAFLUSH, &t) == 0;
+ TURN_ECHO_ON(t);
+ } else {
+ echo_off = 0;
+ }
+ } else {
+ echo_off = 0;
+ }
+
+ /* Write the prompt. */
+ fputs(prompt, out);
+ fflush(out);
+
+ /* Read the password. */
+ buf[0] = 0;
+ if (!gotintr) {
+ in_fd = fileno(in);
+ if (fgets(buf, bufsize, in) == NULL) {
+ buf[0] = 0;
+ }
+ }
+ nread = strlen(buf);
+ if (nread) {
+ if (buf[nread - 1] == '\n')
+ buf[nread - 1] = '\0';
+ }
+
+ /* Restore echoing. */
+ if (echo_off) {
+ if (gotintr && in_fd == -1) {
+ in = fopen ("/dev/tty", "w+");
+ }
+ if (in != NULL)
+ tcsetattr (fileno (in), TCSANOW, &t);
+ }
+
+ fprintf(out, "\n");
+ fflush(out);
+
+ if (in && in != stdin) /* We opened the terminal; now close it. */
+ fclose(in);
+
+ /* Catch problematic signals */
+ catch_signal(SIGINT, SIGNAL_CAST SIG_DFL);
+
+ if (gotintr) {
+ printf("Interupted by signal.\n");
+ fflush(stdout);
+ exit(1);
+ }
+ return buf;
+}