[patch] Samba 2.09: /etc/passwd.samba instead of /etc/passwd

[Thomas Jarosch]

> > I've developed a short, dirty patch for Samba 2.09
> > that allows me to have a separate /etc/passwd for Samba.
> > (and so allows me to have virtual users running under the UID of
"nobody")
> >
> > It's based upon the diet libc (www.fefe.de/dietlibc/)
> > getpwnam() and getpwuid() functions.
> >
> > Please CC: any comments as I'm not on the Samba list.
> >
> > Enjoy, Thomas.
> >
> > [demime 0.98b removed an attachment of type application/octet-stream
which had a name of samba-getpwnam.patch]
> > --
> > To unsubscribe from this list go to the following URL and read the
> > instructions:  http://lists.samba.org/mailman/listinfo/samba
>
> You will need to send it as plain-text, as binary attachments are
> striped by the list.  Also, the best destination is
> samba-patches at samba.org, possibly CCing this list or
> samba-techincal at samba.org, where they are indexed for future reference.
>
> However, based on your description I suspect that there may be some
> issues with the patch, but I would need to see it to tell.  In
> particualar, I would worry about how it would work on PAM based systems
> and on the possiblity that different utilities might operate on one
> smbpasswd file with compleatly different world views, with 'interesting'
> results.
>
> Andrew Bartlet

Okay, I've resent it. I don't know much about PAM,
but if it provides a wrapper for the getpwent()/getfpwent() functions
then it could work. Someone should give it a try.

Thomas.

diff -r -u samba-2.0.7/source/lib/system.c
samba-2.0.7.pwnam/source/lib/system.c
--- samba-2.0.7/source/lib/system.c Wed Apr 26 01:06:52 2000
+++ samba-2.0.7.pwnam/source/lib/system.c Fri May 25 17:34:23 2001
@@ -718,9 +718,55 @@
  Wrapper for getpwnam(). Always returns a static that can be modified.

****************************************************************************
/

+struct passwd *my_getpwnam(const char * name) {
+  struct passwd *tmp;
+  FILE *in = fopen ("/etc/passwd.samba", "rb");
+  if (in == NULL)
+ return 0;
+
+  for (;;) {
+    tmp=fgetpwent(in);
+    if (!tmp) {
+  fclose (in);
+  return 0;
+  }
+    if (!strcmp(tmp->pw_name,name)){
+  fclose (in);
+                return tmp;
+  }
+  }
+}
+
+/**************************************************************************
+ Wrapper for getpwuid(). Always returns a static that can be modified.
+***************************************************************************
*/
+
+struct passwd *my_getpwuid(uid_t uid) {
+  struct passwd *tmp;
+  FILE *in = fopen ("/etc/passwd.samba", "rb");
+  if (in == NULL)
+ return 0;
+
+  for (;;) {
+    tmp=fgetpwent(in);
+    if (!tmp) {
+  fclose (in);
+  return 0;
+  }
+    if (tmp->pw_uid==uid) {
+  fclose (in);
+                return tmp;
+  }
+  }
+}
+
+/**************************************************************************
+ Wrapper for getpwnam(). Always returns a static that can be modified.
+***************************************************************************
*/
+
 struct passwd *sys_getpwnam(const char *name)
 {
- return setup_pwret(getpwnam(name));
+ return setup_pwret(my_getpwnam(name));
 }

 /**************************************************************************
@@ -729,7 +775,7 @@

 struct passwd *sys_getpwuid(uid_t uid)
 {
- return setup_pwret(getpwuid(uid));
+ return setup_pwret(my_getpwuid(uid));
 }

 /**************************************************************************