1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/*
SSSD
nscd.c
Copyright (C) Jakub Hrozek <jhrozek@redhat.com> 2010
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdio.h>
#include <talloc.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "util/util.h"
#include "tools/tools_util.h"
#ifndef NSCD_RELOAD_ARG
#define NSCD_RELOAD_ARG "-i"
#endif
#if defined(NSCD_PATH) && defined(HAVE_NSCD)
int flush_nscd_cache(enum nscd_db flush_db)
{
const char *service;
pid_t nscd_pid;
int ret, status;
switch(flush_db) {
case NSCD_DB_PASSWD:
service = "passwd";
break;
case NSCD_DB_GROUP:
service = "group";
break;
default:
DEBUG(SSSDBG_CRIT_FAILURE, "Unknown nscd database\n");
ret = EINVAL;
goto done;
}
nscd_pid = fork();
switch (nscd_pid) {
case 0:
execl(NSCD_PATH, "nscd", NSCD_RELOAD_ARG, service, NULL);
/* if this returns it is an error */
DEBUG(SSSDBG_CRIT_FAILURE,
"execl(3) failed: %d(%s)\n", errno, strerror(errno));
exit(errno);
case -1:
DEBUG(SSSDBG_CRIT_FAILURE, "fork failed\n");
ret = EFAULT;
break;
default:
do {
errno = 0;
ret = waitpid(nscd_pid, &status, 0);
} while (ret == -1 && errno == EINTR);
if (ret > 0) {
if (WIFEXITED(status)) {
ret = WEXITSTATUS(status);
if (ret > 0) {
/* The flush fails if nscd is not running, so do not care
* about the return code */
DEBUG(SSSDBG_TRACE_INTERNAL,
"Error flushing cache, is nscd running?\n");
}
}
} else {
DEBUG(SSSDBG_FUNC_DATA,
"Failed to wait for children %d\n", nscd_pid);
ret = EIO;
}
}
done:
return ret;
}
#else /* defined(NSCD_PATH) && defined(HAVE_NSCD) */
int flush_nscd_cache(enum nscd_db flush_db)
{
return EOK;
}
#endif
/* NSCD config file parse and check */
static unsigned int sss_nscd_check_service(char* svc_name)
{
struct sss_nscd_db {
const char *svc_type_name;
unsigned int nscd_service_flag;
};
int i;
unsigned int ret = 0;
struct sss_nscd_db db[] = {
{ "passwd", 0x0001 },
{ "group", 0x0010 },
{ "netgroup", 0x0100 },
{ "services", 0x1000 },
{ NULL, 0 }
};
if (svc_name == NULL) {
return ret;
}
for (i = 0; db[i].svc_type_name != NULL; i++) {
if (!strcmp(db[i].svc_type_name, svc_name)) {
ret = db[i].nscd_service_flag;
break;
}
}
return ret;
}
errno_t sss_nscd_parse_conf(const char *conf_path)
{
FILE *fp;
int ret = EOK;
unsigned int occured = 0;
char *line, *entry, *service, *enabled, *pad;
size_t linelen = 0;
fp = fopen(conf_path, "r");
if (fp == NULL) {
DEBUG(SSSDBG_MINOR_FAILURE, "Couldn't open NSCD configuration "
"file [%s]\n", NSCD_CONF_PATH);
return ENOENT;
}
while (getline(&line, &linelen, fp) != -1) {
pad = strchr(line, '#');
if (pad != NULL) {
*pad = '\0';
}
if (line[0] == '\n' || line[0] == '\0') continue;
entry = line;
while (isspace(*entry) && *entry != '\0') {
entry++;
}
pad = entry;
while (!isspace(*pad) && *pad != '\0') {
pad++;
}
service = pad;
while (isspace(*service) && *service != '\0') {
service++;
}
*pad = '\0';
pad = service;
while (!isspace(*pad) && *pad != '\0') {
pad++;
}
enabled = pad;
while (isspace(*enabled) && *enabled != '\0') {
enabled++;
}
*pad = '\0';
pad = enabled;
while (!isspace(*pad) && *pad != '\0') {
pad++;
}
*pad = '\0';
if (!strcmp(entry, "enable-cache") &&
!strcmp(enabled, "yes")) {
occured |= sss_nscd_check_service(service);
}
};
ret = ferror(fp);
if (ret) {
DEBUG(SSSDBG_MINOR_FAILURE, "Reading NSCD configuration file [%s] "
"ended with failure [%d]: %s.\n",
NSCD_CONF_PATH, ret, strerror(ret));
ret = ENOENT;
goto done;
}
ret = EOK;
if (occured != 0) {
ret = EEXIST;
goto done;
}
done:
free(line);
fclose(fp);
return ret;
}
|
