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YAMF2.2: Allow @group entries in /etc/ftpusers & /etc/ftpchroot to deny 

and allow chroot access to entire groups.
This commit is contained in:
David Nugent 1997-04-27 08:29:21 +00:00
parent 524a1478c8
commit 31fea7b8f2
2 changed files with 35 additions and 10 deletions
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19
libexec/ftpd/ftpd.8
View File

@ -30,7 +30,7 @@
.\" SUCH DAMAGE.
.\"
.\" @(#)ftpd.8 8.2 (Berkeley) 4/19/94
.\" $Id: ftpd.8,v 1.15 1997/04/23 04:56:39 davidn Exp $
.\" $Id: ftpd.8,v 1.16 1997/04/26 12:23:51 davidn Exp $
.\"
.Dd April 19, 1994
.Dt FTPD 8
@ -261,11 +261,20 @@ Bellcore.
The login name must not appear in the file
.Pa /etc/ftpusers .
.It
The login name must not be a member of a group specified in the file
.Pa /etc/ftpusers .
Entries in this file interpreted as group names are prefixed by an "at"
.Ql \&@
sign.
.It
The user must have a standard shell returned by
.Xr getusershell 3 .
.It
If the user name appears in the file
.Pa /etc/ftpchroot
.Pa /etc/ftpchroot ,
or the user is a member of a group with a group entry in this file,
i.e. one prefixed with
.Ql \&@ ,
the session's root will be changed to the user's login directory by
.Xr chroot 2
as for an
@ -273,13 +282,13 @@ as for an
or
.Dq ftp
account (see next item).
This facility may also be used by using the boolean "ftp-chroot"
This facility may also be triggered by enabling the boolean "ftp-chroot"
capability in
.Xr login.conf 5 .
However, the user must still supply a password.
This feature is intended as a compromise between a fully anonymous account
and a fully privileged account. The account should also be set up as for an
anonymous account.
and a fully privileged account.
The account should also be set up as for an anonymous account.
.It
If the user name is
.Dq anonymous

26
libexec/ftpd/ftpd.c
View File

@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: ftpd.c,v 1.35 1997/04/23 04:56:39 davidn Exp $
* $Id: ftpd.c,v 1.36 1997/04/26 12:12:10 davidn Exp $
*/
#if 0
@ -76,6 +76,7 @@ static char sccsid[] = "@(#)ftpd.c 8.4 (Berkeley) 4/16/94";
#include <limits.h>
#include <netdb.h>
#include <pwd.h>
#include <grp.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
@ -670,15 +671,30 @@ checkuser(fname, name)
char *p, line[BUFSIZ];
if ((fd = fopen(fname, "r")) != NULL) {
while (fgets(line, sizeof(line), fd) != NULL)
while (!found && fgets(line, sizeof(line), fd) != NULL)
if ((p = strchr(line, '\n')) != NULL) {
*p = '\0';
if (line[0] == '#')
continue;
if (strcmp(line, name) == 0) {
found = 1;
break;
/*
* if first chr is '@', check group membership
*/
if (line[0] == '@') {
int i = 0;
struct group *grp;
if ((grp = getgrnam(line+1)) == NULL)
continue;
while (!found && grp->gr_mem[i])
found = strcmp(name,
grp->gr_mem[i++])
== 0;
}
/*
* Otherwise, just check for username match
*/
else
found = strcmp(line, name) == 0;
}
(void) fclose(fd);
}