Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdebase@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 284 insertions, 0 deletions

diff --git a/kdepasswd/passwd.cpp b/kdepasswd/passwd.cpp
new file mode 100644
index 000000000..903b2830f
--- /dev/null
+++ b/kdepasswd/passwd.cpp
@@ -0,0 +1,284 @@
+/* vi: ts=8 sts=4 sw=4
+ *
+ * $Id$
+ *
+ * This file is part of the KDE project, module kdesu.
+ * Copyright (C) 1999,2000 Geert Jansen <[email protected]>
+ * 
+ * passwd.cpp: Change a user's password.
+ */
+
+#include <config.h> // setenv
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <signal.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <qcstring.h>
+
+#include <kdebug.h>
+#include <kstandarddirs.h>
+
+#include <kdesu/process.h>
+#include "passwd.h"
+
+
+PasswdProcess::PasswdProcess(QCString user)
+{
+    struct passwd *pw;
+
+    if (user.isEmpty()) 
+    {
+	pw = getpwuid(getuid());
+	if (pw == 0L) 
+	{
+	    kdDebug(1512) << "You don't exist!\n";
+            return;
+	}
+	m_User = pw->pw_name;
+    } else 
+    {
+	pw = getpwnam(user);
+	if (pw == 0L) 
+	{
+	    kdDebug(1512) << k_lineinfo << "User " << user << "does not exist.\n";
+	    return;
+	}
+	m_User = user;
+    }
+    bOtherUser = (pw->pw_uid != getuid());
+}
+
+
+PasswdProcess::~PasswdProcess()
+{
+}
+
+
+int PasswdProcess::checkCurrent(const char *oldpass)
+{
+    return exec(oldpass, 0L, 1);
+}
+    
+
+int PasswdProcess::exec(const char *oldpass, const char *newpass,
+	int check)
+{    
+    if (m_User.isEmpty())
+	return -1;
+//    if (check)
+//	setTerminal(true);
+
+    // Try to set the default locale to make the parsing of the output 
+    // of `passwd' easier.
+    setenv("LANG","C", true /* override */);
+
+    QCStringList args;
+    if(bOtherUser)
+        args += m_User;
+    int ret = PtyProcess::exec("passwd", args);
+    if (ret < 0)
+    {
+	kdDebug(1512) << k_lineinfo << "Passwd not found!\n";
+	return PasswdNotFound;
+    }
+
+    ret = ConversePasswd(oldpass, newpass, check);
+    if (ret < 0)
+        kdDebug(1512) << k_lineinfo << "Conversation with passwd failed. pid = " << pid() << endl;
+
+    if ((waitForChild() != 0) && !check)
+        return PasswordNotGood;
+
+    return ret;
+}
+
+
+/*
+ * The tricky thing is to make this work with a lot of different passwd
+ * implementations. We _don't_ want implementation specific routines.
+ * Return values: -1 = unknown error, 0 = ok, >0 = error code.
+ */
+
+int PasswdProcess::ConversePasswd(const char *oldpass, const char *newpass, 
+	int check)
+{
+    QCString line, errline;
+    int state = 0;
+
+    while (state != 7)
+    {
+	line = readLine();
+	if (line.isNull()) 
+	{
+	    return -1;
+	}
+
+	if (state == 0 && isPrompt(line, "new"))
+	    // If root is changing a user's password,
+	    // passwd can't prompt for the original password.
+	    // Therefore, we have to start at state=2.
+	    state=2;
+
+	switch (state) 
+	{
+	case 0:
+	    // Eat garbage, wait for prompt
+	    m_Error += line+"\n";
+	    if (isPrompt(line, "password")) 
+	    {
+		WaitSlave();
+		write(m_Fd, oldpass, strlen(oldpass));
+		write(m_Fd, "\n", 1);
+		state++; 
+		break;
+	    }
+	    if (m_bTerminal) 
+		fputs(line, stdout);
+	    break;
+	
+	case 1: case 3: case 6:
+	    // Wait for \n
+	    if (line.isEmpty()) 
+	    {
+		state++;
+		break;
+	    }
+	    // error
+	    return -1;
+
+	case 2: 
+	    m_Error = "";
+	    if( line.contains("again"))
+	    {
+		m_Error = line;
+		kill(m_Pid, SIGKILL);
+		waitForChild();
+		return PasswordIncorrect;
+	    }
+	    // Wait for second prompt.
+	    errline = line;  // use first line for error message
+	    while (!isPrompt(line, "new"))
+	    {
+	    	line = readLine();
+				if (line.isNull())
+				{
+	    		// We didn't get the new prompt so assume incorrect password.
+	    		if (m_bTerminal)
+						fputs(errline, stdout);
+					m_Error = errline;
+					return PasswordIncorrect;
+				}
+	    }
+
+			// we have the new prompt
+			if (check)
+			{
+				kill(m_Pid, SIGKILL);
+		    waitForChild();
+		    return 0;
+			}
+			WaitSlave();
+			write(m_Fd, newpass, strlen(newpass));
+			write(m_Fd, "\n", 1);
+			state++;
+			break;
+
+	case 4:
+	    // Wait for third prompt
+	    if (isPrompt(line, "re")) 
+	    {
+		WaitSlave();
+		write(m_Fd, newpass, strlen(newpass));
+		write(m_Fd, "\n", 1);
+		state += 2;
+		break;
+	    }
+	    // Warning or error about the new password
+	    if (m_bTerminal) 
+		fputs(line, stdout);
+	    m_Error = line + "\n";
+	    state++;
+	    break;
+
+	case 5:
+	    // Wait for either a "Reenter password" or a "Enter password" prompt
+	    if (isPrompt(line, "re"))
+	    {
+		WaitSlave();
+		write(m_Fd, newpass, strlen(newpass));
+		write(m_Fd, "\n", 1);
+		state++;
+		break;
+	    }
+	    else if (isPrompt(line, "password"))
+	    {
+		kill(m_Pid, SIGKILL);
+		waitForChild();
+		return PasswordNotGood;
+	    }
+	    if (m_bTerminal)
+		fputs(line, stdout);
+	    m_Error += line + "\n";
+	    break;
+	}
+    }
+
+    // Are we ok or do we still get an error thrown at us?
+    m_Error = "";
+    state = 0;
+    while (state != 1)
+    {
+	line = readLine();
+	if (line.isNull()) 
+	{
+	    // No more input... OK
+	    return 0;
+	}
+	if (isPrompt(line, "password"))
+	{
+	   // Uh oh, another prompt. Not good!
+           kill(m_Pid, SIGKILL);
+	   waitForChild();
+	   return PasswordNotGood;
+	}
+	m_Error += line + "\n"; // Collect error message
+    }
+
+    kdDebug(1512) << k_lineinfo << "Conversation ended successfully.\n";
+    return 0;
+}
+    
+
+bool PasswdProcess::isPrompt(QCString line, const char *word)
+{
+    unsigned i, j, colon;
+    unsigned int lineLength(line.length());
+    for (i=0,j=0,colon=0; i<lineLength; i++) 
+    {
+	if (line[i] == ':') 
+	{
+	    j = i; colon++;
+	    continue;
+	}
+	if (!isspace(line[i]))
+	    j++;
+    }
+
+    if ((colon != 1) || (line[j] != ':'))
+	return false;
+    if (word == 0L)
+	return true;
+    return line.contains(word, false);
+}
+
+