2 * Copyright (c) 1996 by
3 * Sean Eric Fagan <sef@kithrup.com>
4 * David Nugent <davidn@blaze.net.au>
7 * Portions copyright (c) 1995,1997 by
8 * Berkeley Software Design, Inc.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, is permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice immediately at the beginning of the file, without modification,
16 * this list of conditions, and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. This work was done expressly for inclusion into FreeBSD. Other use
21 * is permitted provided this notation is included.
22 * 4. Absolutely no warranty of function or purpose is made by the authors.
23 * 5. Modifications may be freely made to this file providing the above
26 * Low-level routines relating to the user capabilities database
28 * $FreeBSD: src/lib/libutil/login_auth.c,v 1.11 1999/08/28 00:05:45 peter Exp $
31 #include <sys/types.h>
33 #include <sys/resource.h>
35 #include <sys/param.h>
46 #include <login_cap.h>
49 #include <sys/socket.h>
57 * Checks for the existance of a nologin file in the login_cap
58 * capability <lc>. If there isn't one specified, then it checks
59 * to see if this class should just ignore nologin files. Lastly,
60 * it tries to print out the default nologin file, and, if such
65 auth_checknologin(login_cap_t *lc)
69 /* Do we ignore a nologin file? */
70 if (login_getcapbool(lc, "ignorenologin", 0))
73 /* Note that <file> will be "" if there is no nologin capability */
74 if ((file = login_getcapstr(lc, "nologin", "", NULL)) == NULL)
78 * *file is true IFF there was a "nologin" capability
79 * Note that auth_cat() returns 1 only if the specified
80 * file exists, and is readable. E.g., /.nologin exists.
82 if ((*file && auth_cat(file)) || auth_cat(_PATH_NOLOGIN))
89 * Checks for the readability of <file>; if it can be opened for
90 * reading, it prints it out to stdout, and then exits. Otherwise,
91 * it returns 0 (meaning no nologin file).
95 auth_cat(const char *file)
100 if ((fd = open(file, O_RDONLY)) < 0)
102 while ((count = read(fd, buf, sizeof(buf))) > 0)
103 (void)write(fileno(stdout), buf, count);
105 sleep(5); /* wait an arbitrary time to drain */