table_getpwnam.c revision 1.15 
1/*	$OpenBSD: table_getpwnam.c,v 1.15 2024/05/14 13:28:08 op Exp $	*/
2
3/*
4 * Copyright (c) 2012 Gilles Chehade <gilles@poolp.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <errno.h>
20#include <pwd.h>
21
22#include "smtpd.h"
23
24/* getpwnam(3) backend */
25static int table_getpwnam_config(struct table *);
26static int table_getpwnam_update(struct table *);
27static int table_getpwnam_open(struct table *);
28static int table_getpwnam_lookup(struct table *, enum table_service, const char *,
29    char **);
30static void table_getpwnam_close(struct table *);
31
32struct table_backend table_backend_getpwnam = {
33	.name = "getpwnam",
34	.services = K_USERINFO,
35	.config = table_getpwnam_config,
36	.add = NULL,
37	.dump = NULL,
38	.open = table_getpwnam_open,
39	.update = table_getpwnam_update,
40	.close = table_getpwnam_close,
41	.lookup = table_getpwnam_lookup,
42	.fetch = NULL,
43};
44
45
46static int
47table_getpwnam_config(struct table *table)
48{
49	if (table->t_config[0])
50		return 0;
51	return 1;
52}
53
54static int
55table_getpwnam_update(struct table *table)
56{
57	return 1;
58}
59
60static int
61table_getpwnam_open(struct table *table)
62{
63	return 1;
64}
65
66static void
67table_getpwnam_close(struct table *table)
68{
69	return;
70}
71
72static int
73table_getpwnam_lookup(struct table *table, enum table_service kind, const char *key,
74    char **dst)
75{
76	struct passwd	       *pw;
77
78	if (kind != K_USERINFO)
79		return -1;
80
81	errno = 0;
82	do {
83		pw = getpwnam(key);
84	} while (pw == NULL && errno == EINTR);
85
86	if (pw == NULL) {
87		if (errno)
88			return -1;
89		return 0;
90	}
91	if (dst == NULL)
92		return 1;
93
94	if (asprintf(dst, "%d:%d:%s",
95	    pw->pw_uid,
96	    pw->pw_gid,
97	    pw->pw_dir) == -1) {
98		*dst = NULL;
99		return -1;
100	}
101
102	return (1);
103}
104