table_getpwnam.c revision 1.12 
1/*	$OpenBSD: table_getpwnam.c,v 1.12 2018/12/27 14:23:41 eric 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 <sys/types.h>
20#include <sys/queue.h>
21#include <sys/tree.h>
22#include <sys/socket.h>
23
24#include <ctype.h>
25#include <err.h>
26#include <errno.h>
27#include <event.h>
28#include <fcntl.h>
29#include <imsg.h>
30#include <pwd.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <limits.h>
34#include <string.h>
35
36#include "smtpd.h"
37#include "log.h"
38
39
40/* getpwnam(3) backend */
41static int table_getpwnam_config(struct table *);
42static int table_getpwnam_update(struct table *);
43static int table_getpwnam_open(struct table *);
44static int table_getpwnam_lookup(struct table *, enum table_service, const char *,
45    char **);
46static void table_getpwnam_close(struct table *);
47
48struct table_backend table_backend_getpwnam = {
49	"getpwnam",
50	K_USERINFO,
51	table_getpwnam_config,
52	NULL,
53	NULL,
54	table_getpwnam_open,
55	table_getpwnam_update,
56	table_getpwnam_close,
57	table_getpwnam_lookup,
58};
59
60
61static int
62table_getpwnam_config(struct table *table)
63{
64	if (table->t_config[0])
65		return 0;
66	return 1;
67}
68
69static int
70table_getpwnam_update(struct table *table)
71{
72	return 1;
73}
74
75static int
76table_getpwnam_open(struct table *table)
77{
78	return 1;
79}
80
81static void
82table_getpwnam_close(struct table *table)
83{
84	return;
85}
86
87static int
88table_getpwnam_lookup(struct table *table, enum table_service kind, const char *key,
89    char **dst)
90{
91	struct passwd	       *pw;
92
93	if (kind != K_USERINFO)
94		return -1;
95
96	errno = 0;
97	do {
98		pw = getpwnam(key);
99	} while (pw == NULL && errno == EINTR);
100
101	if (pw == NULL) {
102		if (errno)
103			return -1;
104		return 0;
105	}
106	if (dst == NULL)
107		return 1;
108
109	if (asprintf(dst, "%d:%d:%s",
110	    pw->pw_uid,
111	    pw->pw_gid,
112	    pw->pw_dir) == -1) {
113		*dst = NULL;
114		return -1;
115	}
116
117	return (1);
118}
119