f7a00a2334
libmisc/sulog.c, libmisc/hushed.c, libmisc/failure.c, libmisc/loginprompt.c, libmisc/ttytype.c, libmisc/pam_pass_non_interractive.c, src/userdel.c, src/login.c, lib/commonio.c, lib/commonio.h: Fix some const issues. * libmisc/motd.c: Avoid multi-statements lines. * libmisc/motd.c: Support long MOTD_FILE. * libmisc/list.c, lib/prototypes.h: Revert previous change. dup_list and is_on_list are used with members as defined for the group structure, and thus even if the list is not modified, the list elements cannot be constant strings. * libmisc/system.c: Avoid C++ comments. * src/vipw.c: WITH_TCB cannot be tested inside a gettextized string. Split the Usage string. * lib/commonio.h: Re-indent.
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 1991 , Julianne Frances Haugh
|
|
* Copyright (c) 1991 , Chip Rosenthal
|
|
* Copyright (c) 1996 - 1998, Marek Michałkiewicz
|
|
* Copyright (c) 2003 - 2005, Tomasz Kłoczko
|
|
* Copyright (c) 2007 - 2008, Nicolas François
|
|
* 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.
|
|
* 3. The name of the copyright holders or contributors may not be used to
|
|
* endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
|
|
* HOLDERS 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.
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include "defines.h"
|
|
#include <stdio.h>
|
|
#include "getdef.h"
|
|
#include "prototypes.h"
|
|
|
|
#ident "$Id$"
|
|
|
|
/* local function prototypes */
|
|
static bool is_listed (const char *cfgin, const char *tty, bool def);
|
|
|
|
/*
|
|
* This is now rather generic function which decides if "tty" is listed
|
|
* under "cfgin" in config (directly or indirectly). Fallback to default if
|
|
* something is bad.
|
|
*/
|
|
static bool is_listed (const char *cfgin, const char *tty, bool def)
|
|
{
|
|
FILE *fp;
|
|
char buf[200], *s;
|
|
const char *cons;
|
|
|
|
/*
|
|
* If the CONSOLE configuration definition isn't given,
|
|
* fallback to default.
|
|
*/
|
|
|
|
cons = getdef_str (cfgin);
|
|
if (NULL == cons) {
|
|
return def;
|
|
}
|
|
|
|
/*
|
|
* If this isn't a filename, then it is a ":" delimited list of
|
|
* console devices upon which root logins are allowed.
|
|
*/
|
|
|
|
if (*cons != '/') {
|
|
strcpy (buf, cons);
|
|
while ((s = strtok (buf, ":")) != NULL) {
|
|
if (strcmp (s, tty) == 0) {
|
|
return true;
|
|
}
|
|
|
|
cons = NULL;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* If we can't open the console list, then call everything a
|
|
* console - otherwise root will never be allowed to login.
|
|
*/
|
|
|
|
fp = fopen (cons, "r");
|
|
if (NULL == fp) {
|
|
return def;
|
|
}
|
|
|
|
/*
|
|
* See if this tty is listed in the console file.
|
|
*/
|
|
|
|
while (fgets (buf, (int) sizeof (buf), fp) != NULL) {
|
|
buf[strlen (buf) - 1] = '\0';
|
|
if (strcmp (buf, tty) == 0) {
|
|
(void) fclose (fp);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This tty isn't a console.
|
|
*/
|
|
|
|
(void) fclose (fp);
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* console - return 1 if the "tty" is a console device, else 0.
|
|
*
|
|
* Note - we need to take extreme care here to avoid locking out root logins
|
|
* if something goes awry. That's why we do things like call everything a
|
|
* console if the consoles file can't be opened. Because of this, we must
|
|
* warn the user to protect against the remove of the consoles file since
|
|
* that would allow an unauthorized root login.
|
|
*/
|
|
|
|
bool console (const char *tty)
|
|
{
|
|
if (strncmp (tty, "/dev/", 5) == 0) {
|
|
tty += 5;
|
|
}
|
|
|
|
return is_listed ("CONSOLE", tty, true);
|
|
}
|
|
|