added extpass option

include/pcp/readpass.h

@@ -0,0 +1,69 @@
+/*-
+ * Copyright 2009 Colin Percival
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * This file was originally written by Colin Percival as part of the Tarsnap
+ * online backup system.
+ */
+#ifndef _READPASS_H_
+#define _READPASS_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+
+#include "defines.h"
+#include "context.h"
+#include "util.h"
+
+#define MAXPASSLEN 2048
+
+/**
+ * tarsnap_getpass(passwd, prompt, confirmprompt, devtty)
+ * If ${devtty} is non-zero, read a password from /dev/tty if possible; if
+ * not, read from stdin.  If reading from a tty (either /dev/tty or stdin),
+ * disable echo and prompt the user by printing ${prompt} to stderr.  If
+ * ${confirmprompt} is non-NULL, read a second password (prompting if a
+ * terminal is being used) and repeat until the user enters the same password
+ * twice.  Return the password as a malloced NUL-terminated string via
+ * ${passwd}.  The obscure name is to avoid namespace collisions due to the
+ * getpass / readpass / readpassphrase / etc. functions in various libraries.
+ */
+int pcp_readpass(PCPCTX *ptx, char **passwd, const char *prompt,
+		 const char *confirmprompt, int devtty, char *readfromfile);
+
+/**
+   from encfs getUserKey().
+   
+*/
+int pcp_readpass_fromprog(PCPCTX *ptx, char **passwd, const char *askpass);
+
+#endif /* !_READPASS_H_ */