table_getpwnam.c revision 1.10 
1/*	$OpenBSD: table_getpwnam.c,v 1.10 2018/12/27 08:57:03 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(void *, 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	table_getpwnam_open,
53	table_getpwnam_update,
54	table_getpwnam_close,
55	table_getpwnam_lookup,
56};
57
58
59static int
60table_getpwnam_config(struct table *table)
61{
62	if (table->t_config[0])
63		return 0;
64	return 1;
65}
66
67static int
68table_getpwnam_update(struct table *table)
69{
70	return 1;
71}
72
73static int
74table_getpwnam_open(struct table *table)
75{
76	return 1;
77}
78
79static void
80table_getpwnam_close(struct table *table)
81{
82	return;
83}
84
85static int
86table_getpwnam_lookup(void *hdl, enum table_service kind, const char *key,
87    char **dst)
88{
89	struct passwd	       *pw;
90
91	if (kind != K_USERINFO)
92		return -1;
93
94	errno = 0;
95	do {
96		pw = getpwnam(key);
97	} while (pw == NULL && errno == EINTR);
98
99	if (pw == NULL) {
100		if (errno)
101			return -1;
102		return 0;
103	}
104	if (dst == NULL)
105		return 1;
106
107	if (asprintf(dst, "%d:%d:%s",
108	    pw->pw_uid,
109	    pw->pw_gid,
110	    pw->pw_dir) == -1) {
111		*dst = NULL;
112		return -1;
113	}
114
115	return (1);
116}
117