r13494: Merge the stuff I've done in head the last days.

Volker
(This used to be commit bb40e544de68f01a6e774753f508e69373b39899)

1 files changed, 178 insertions, 0 deletions

diff --git a/source3/smbd/map_username.c b/source3/smbd/map_username.c
new file mode 100644
index 0000000000..a6025fcf47
--- /dev/null
+++ b/source3/smbd/map_username.c
@@ -0,0 +1,178 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Username handling
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Jeremy Allison 1997-2001.
+   Copyright (C) Volker Lendecke 2006
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program 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 General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/*******************************************************************
+ Map a username from a dos name to a unix name by looking in the username
+ map. Note that this modifies the name in place.
+ This is the main function that should be called *once* on
+ any incoming or new username - in order to canonicalize the name.
+ This is being done to de-couple the case conversions from the user mapping
+ function. Previously, the map_username was being called
+ every time Get_Pwnam was called.
+ Returns True if username was changed, false otherwise.
+********************************************************************/
+
+BOOL map_username(fstring user)
+{
+	static BOOL initialised=False;
+	static fstring last_from,last_to;
+	XFILE *f;
+	char *mapfile = lp_username_map();
+	char *s;
+	pstring buf;
+	BOOL mapped_user = False;
+	char *cmd = lp_username_map_script();
+	
+	if (!*user)
+		return False;
+		
+	if (strequal(user,last_to))
+		return False;
+
+	if (strequal(user,last_from)) {
+		DEBUG(3,("Mapped user %s to %s\n",user,last_to));
+		fstrcpy(user,last_to);
+		return True;
+	}
+	
+	/* first try the username map script */
+	
+	if ( *cmd ) {
+		char **qlines;
+		pstring command;
+		int numlines, ret, fd;
+
+		pstr_sprintf( command, "%s \"%s\"", cmd, user );
+
+		DEBUG(10,("Running [%s]\n", command));
+		ret = smbrun(command, &fd);
+		DEBUGADD(10,("returned [%d]\n", ret));
+
+		if ( ret != 0 ) {
+			if (fd != -1)
+				close(fd);
+			return False;
+		}
+
+		numlines = 0;
+		qlines = fd_lines_load(fd, &numlines,0);
+		DEBUGADD(10,("Lines returned = [%d]\n", numlines));
+		close(fd);
+
+		/* should be either no lines or a single line with the mapped username */
+
+		if (numlines) {
+			DEBUG(3,("Mapped user %s to %s\n", user, qlines[0] ));
+			fstrcpy( user, qlines[0] );
+		}
+
+		file_lines_free(qlines);
+		
+		return numlines != 0;
+	}
+
+	/* ok.  let's try the mapfile */
+	
+	if (!*mapfile)
+		return False;
+
+	if (!initialised) {
+		*last_from = *last_to = 0;
+		initialised = True;
+	}
+  
+	f = x_fopen(mapfile,O_RDONLY, 0);
+	if (!f) {
+		DEBUG(0,("can't open username map %s. Error %s\n",mapfile, strerror(errno) ));
+		return False;
+	}
+
+	DEBUG(4,("Scanning username map %s\n",mapfile));
+
+	while((s=fgets_slash(buf,sizeof(buf),f))!=NULL) {
+		char *unixname = s;
+		char *dosname = strchr_m(unixname,'=');
+		char **dosuserlist;
+		BOOL return_if_mapped = False;
+
+		if (!dosname)
+			continue;
+
+		*dosname++ = 0;
+
+		while (isspace((int)*unixname))
+			unixname++;
+
+		if ('!' == *unixname) {
+			return_if_mapped = True;
+			unixname++;
+			while (*unixname && isspace((int)*unixname))
+				unixname++;
+		}
+    
+		if (!*unixname || strchr_m("#;",*unixname))
+			continue;
+
+		{
+			int l = strlen(unixname);
+			while (l && isspace((int)unixname[l-1])) {
+				unixname[l-1] = 0;
+				l--;
+			}
+		}
+
+		dosuserlist = str_list_make(dosname, NULL);
+		if (!dosuserlist) {
+			DEBUG(0,("Unable to build user list\n"));
+			return False;
+		}
+
+		if (strchr_m(dosname,'*') ||
+		    user_in_list(user, (const char **)dosuserlist)) {
+			DEBUG(3,("Mapped user %s to %s\n",user,unixname));
+			mapped_user = True;
+			fstrcpy( last_from,user );
+			fstrcpy( user, unixname );
+			fstrcpy( last_to,user );
+			if ( return_if_mapped ) {
+				str_list_free (&dosuserlist);
+				x_fclose(f);
+				return True;
+			}
+		}
+    
+		str_list_free (&dosuserlist);
+	}
+
+	x_fclose(f);
+
+	/*
+	 * Setup the last_from and last_to as an optimization so 
+	 * that we don't scan the file again for the same user.
+	 */
+	fstrcpy(last_from,user);
+	fstrcpy(last_to,user);
+
+	return mapped_user;
+}