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-rw-r--r--libc/unistd/getpass.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/libc/unistd/getpass.c b/libc/unistd/getpass.c
new file mode 100644
index 000000000..4fcc489c8
--- /dev/null
+++ b/libc/unistd/getpass.c
@@ -0,0 +1,99 @@
+/* Copyright (C) 1992,93,94,95,96,97,98,99 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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 Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <stdio.h>
+#include <termios.h>
+#include <unistd.h>
+#include <string.h>
+
+/* It is desirable to use this bit on systems that have it.
+ The only bit of terminal state we want to twiddle is echoing, which is
+ done in software; there is no need to change the state of the terminal
+ hardware. */
+
+#ifndef TCSASOFT
+#define TCSASOFT 0
+#endif
+#define PWD_BUFFER_SIZE 256
+
+char *
+getpass (prompt)
+ const char *prompt;
+{
+ FILE *in, *out;
+ struct termios s, t;
+ int tty_changed;
+ static char buf[PWD_BUFFER_SIZE];
+ int nread;
+
+ /* 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;
+
+ /* Turn echoing off if it is on now. */
+
+ if (tcgetattr (fileno (in), &t) == 0)
+ {
+ /* Save the old one. */
+ s = t;
+ /* Tricky, tricky. */
+ t.c_lflag &= ~(ECHO|ISIG);
+ tty_changed = (tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &t) == 0);
+ }
+ else
+ tty_changed = 0;
+
+ /* Write the prompt. */
+ fputs(prompt, out);
+ fflush(out);
+
+ /* Read the password. */
+ fgets (buf, PWD_BUFFER_SIZE-1, in);
+ nread = strlen(buf);
+ if (buf != NULL)
+ {
+ if (nread < 0)
+ buf[0] = '\0';
+ else if (buf[nread - 1] == '\n')
+ {
+ /* Remove the newline. */
+ buf[nread - 1] = '\0';
+ if (tty_changed)
+ /* Write the newline that was not echoed. */
+ putc('\n', out);
+ }
+ }
+
+ /* Restore the original setting. */
+ if (tty_changed)
+ (void) tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &s);
+
+ if (in != stdin)
+ /* We opened the terminal; now close it. */
+ fclose (in);
+
+ return buf;
+}