An nmh-specific getpass, to remove dependency on system

getpass()es, which may or may not do what we want (including
flushing input streams, and taking input from stdin in the
absence of a controlling tty).

diff --git a/sbr/getpass.c b/sbr/getpass.c
new file mode 100644 (file)
index 0000000..6a53b72
--- /dev/null
+++ b/sbr/getpass.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 1988, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $ID$
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <termios.h>
+
+#define PASSWORD_LEN 128
+
+#ifndef TCSANOW
+#define TCSANOW 0
+#endif
+
+char *getpass(const char *prompt)
+{
+  struct termios oterm, term;
+  int ch;
+  char *p, *ttystring, buf[PASSWORD_LEN+1];
+  FILE *fout, *fin;
+
+  /* Find if stdin is connect to a terminal. If so, read directly from
+   * the terminal, and turn off echo. Otherwise read from stdin.
+   */
+
+  if((ttystring = ttyname(fileno(stdin))) == NULL) {
+    fout = stderr;
+    fin = stdin;
+  }
+  else /* Reading directly from terminal here */
+    {
+      fout = fin = fopen(ttystring, "w+");
+      (void)tcgetattr(fileno(fin), &oterm);
+      term = oterm; /* Save original info */
+      term.c_lflag &= ~ECHO;
+      (void)fputs(prompt, fout);
+      rewind(fout);                    /* implied flush */
+      (void)tcsetattr(fileno(fin), TCSANOW, &term);
+    }
+
+  for (p = buf; (ch = getc(fin)) != EOF && ch != '\n';)
+    if (p < buf + PASSWORD_LEN)
+      *p++ = ch;
+  *p = '\0';
+
+  if(ttystring != NULL) {
+    (void)tcsetattr(fileno(fin), TCSANOW, &oterm);
+    rewind(fout);
+    (void)fputc('\n', fout);
+    (void)fclose(fin);
+  }
+  return(buf);
+}