29
30#include <sys/types.h>
31#include <sys/event.h>
32#include <sys/mount.h>
33#include <sys/stat.h>
34#include <sys/sysctl.h>
35#include <sys/user.h>
36#include <sys/wait.h>
37
38#include <err.h>
39#include <errno.h>
40#include <fcntl.h>
41#include <kvm.h>
42#include <login_cap.h>
43#include <paths.h>
44#include <pwd.h>
45#include <signal.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <unistd.h>
50
51#include "jailp.h"
52
53#define DEFAULT_STOP_TIMEOUT 10
54#define PHASH_SIZE 256
55
56LIST_HEAD(phhead, phash);
57
58struct phash {
59 LIST_ENTRY(phash) le;
60 struct cfjail *j;
61 pid_t pid;
62};
63
64int paralimit = -1;
65
66extern char **environ;
67
68static int run_command(struct cfjail *j);
69static void add_proc(struct cfjail *j, pid_t pid);
70static void clear_procs(struct cfjail *j);
71static struct cfjail *find_proc(pid_t pid);
72static int term_procs(struct cfjail *j);
73static int get_user_info(struct cfjail *j, const char *username,
74 const struct passwd **pwdp, login_cap_t **lcapp);
75static int check_path(struct cfjail *j, const char *pname, const char *path,
76 int isfile, const char *umount_type);
77
78static struct cfjails sleeping = TAILQ_HEAD_INITIALIZER(sleeping);
79static struct cfjails runnable = TAILQ_HEAD_INITIALIZER(runnable);
80static struct cfstring dummystring = { .len = 1 };
81static struct phhead phash[PHASH_SIZE];
82static int kq;
83
84/*
85 * Run the next command associated with a jail.
86 */
87int
88next_command(struct cfjail *j)
89{
90 enum intparam comparam;
91 int create_failed;
92
93 if (paralimit == 0) {
94 requeue(j, &runnable);
95 return 1;
96 }
97 create_failed = (j->flags & (JF_STOP | JF_FAILED)) == JF_FAILED;
98 comparam = *j->comparam;
99 for (;;) {
100 if (j->comstring == NULL) {
101 j->comparam += create_failed ? -1 : 1;
102 switch ((comparam = *j->comparam)) {
103 case 0:
104 return 0;
105 case IP_MOUNT_DEVFS:
106 if (!bool_param(j->intparams[IP_MOUNT_DEVFS]))
107 continue;
108 /* FALLTHROUGH */
109 case IP__OP:
110 case IP_STOP_TIMEOUT:
111 j->comstring = &dummystring;
112 break;
113 default:
114 if (j->intparams[comparam] == NULL)
115 continue;
116 j->comstring = create_failed
117 ? TAILQ_LAST(&j->intparams[comparam]->val,
118 cfstrings)
119 : TAILQ_FIRST(&j->intparams[comparam]->val);
120 }
121 } else {
122 j->comstring = j->comstring == &dummystring ? NULL :
123 create_failed
124 ? TAILQ_PREV(j->comstring, cfstrings, tq)
125 : TAILQ_NEXT(j->comstring, tq);
126 }
127 if (j->comstring == NULL || j->comstring->len == 0 ||
128 (create_failed && (comparam == IP_EXEC_PRESTART ||
129 comparam == IP_EXEC_START || comparam == IP_COMMAND ||
130 comparam == IP_EXEC_POSTSTART)))
131 continue;
132 switch (run_command(j)) {
133 case -1:
134 failed(j);
135 /* FALLTHROUGH */
136 case 1:
137 return 1;
138 }
139 }
140}
141
142/*
143 * Check command exit status
144 */
145int
146finish_command(struct cfjail *j)
147{
148 int error;
149
150 if (!(j->flags & JF_SLEEPQ))
151 return 0;
152 j->flags &= ~JF_SLEEPQ;
153 if (*j->comparam == IP_STOP_TIMEOUT)
154 {
155 j->flags &= ~JF_TIMEOUT;
156 j->pstatus = 0;
157 return 0;
158 }
159 paralimit++;
160 if (!TAILQ_EMPTY(&runnable))
161 requeue(TAILQ_FIRST(&runnable), &ready);
162 error = 0;
163 if (j->flags & JF_TIMEOUT) {
164 j->flags &= ~JF_TIMEOUT;
165 if (*j->comparam != IP_STOP_TIMEOUT) {
166 jail_warnx(j, "%s: timed out", j->comline);
167 failed(j);
168 error = -1;
169 } else if (verbose > 0)
170 jail_note(j, "timed out\n");
171 } else if (j->pstatus != 0) {
172 if (WIFSIGNALED(j->pstatus))
173 jail_warnx(j, "%s: exited on signal %d",
174 j->comline, WTERMSIG(j->pstatus));
175 else
176 jail_warnx(j, "%s: failed", j->comline);
177 j->pstatus = 0;
178 failed(j);
179 error = -1;
180 }
181 free(j->comline);
182 j->comline = NULL;
183 return error;
184}
185
186/*
187 * Check for finished processes or timeouts.
188 */
189struct cfjail *
190next_proc(int nonblock)
191{
192 struct kevent ke;
193 struct timespec ts;
194 struct timespec *tsp;
195 struct cfjail *j;
196
197 if (!TAILQ_EMPTY(&sleeping)) {
198 again:
199 tsp = NULL;
200 if ((j = TAILQ_FIRST(&sleeping)) && j->timeout.tv_sec) {
201 clock_gettime(CLOCK_REALTIME, &ts);
202 ts.tv_sec = j->timeout.tv_sec - ts.tv_sec;
203 ts.tv_nsec = j->timeout.tv_nsec - ts.tv_nsec;
204 if (ts.tv_nsec < 0) {
205 ts.tv_sec--;
206 ts.tv_nsec += 1000000000;
207 }
208 if (ts.tv_sec < 0 ||
209 (ts.tv_sec == 0 && ts.tv_nsec == 0)) {
210 j->flags |= JF_TIMEOUT;
211 clear_procs(j);
212 return j;
213 }
214 tsp = &ts;
215 }
216 if (nonblock) {
217 ts.tv_sec = 0;
218 ts.tv_nsec = 0;
219 tsp = &ts;
220 }
221 switch (kevent(kq, NULL, 0, &ke, 1, tsp)) {
222 case -1:
223 if (errno != EINTR)
224 err(1, "kevent");
225 goto again;
226 case 0:
227 if (!nonblock) {
228 j = TAILQ_FIRST(&sleeping);
229 j->flags |= JF_TIMEOUT;
230 clear_procs(j);
231 return j;
232 }
233 break;
234 case 1:
235 (void)waitpid(ke.ident, NULL, WNOHANG);
236 if ((j = find_proc(ke.ident))) {
237 j->pstatus = ke.data;
238 return j;
239 }
240 goto again;
241 }
242 }
243 return NULL;
244}
245
246/*
247 * Run a single command for a jail, possible inside the jail.
248 */
249int
250run_command(struct cfjail *j)
251{
252 const struct passwd *pwd;
253 const struct cfstring *comstring, *s;
254 login_cap_t *lcap;
255 char **argv;
256 char *cs, *comcs, *devpath;
257 const char *jidstr, *conslog, *path, *ruleset, *term, *username;
258 enum intparam comparam;
259 size_t comlen;
260 pid_t pid;
261 int argc, bg, clean, consfd, down, fib, i, injail, sjuser, timeout;
262#if defined(INET) || defined(INET6)
263 char *addr;
264#endif
265
266 static char *cleanenv;
267
268 /* Perform some operations that aren't actually commands */
269 comparam = *j->comparam;
270 down = j->flags & (JF_STOP | JF_FAILED);
271 switch (comparam) {
272 case IP_STOP_TIMEOUT:
273 return term_procs(j);
274
275 case IP__OP:
276 if (down) {
277 if (jail_remove(j->jid) < 0 && errno == EPERM) {
278 jail_warnx(j, "jail_remove: %s",
279 strerror(errno));
280 return -1;
281 }
282 if (verbose > 0 || (verbose == 0 && (j->flags & JF_STOP
283 ? note_remove : j->name != NULL)))
284 jail_note(j, "removed\n");
285 j->jid = -1;
286 if (j->flags & JF_STOP)
287 dep_done(j, DF_LIGHT);
288 else
289 j->flags &= ~JF_PERSIST;
290 } else {
291 if (create_jail(j) < 0)
292 return -1;
293 if (verbose >= 0 && (j->name || verbose > 0))
294 jail_note(j, "created\n");
295 dep_done(j, DF_LIGHT);
296 }
297 return 0;
298
299 default: ;
300 }
301 /*
302 * Collect exec arguments. Internal commands for network and
303 * mounting build their own argument lists.
304 */
305 comstring = j->comstring;
306 bg = 0;
307 switch (comparam) {
308#ifdef INET
309 case IP__IP4_IFADDR:
310 argv = alloca(8 * sizeof(char *));
311 *(const char **)&argv[0] = _PATH_IFCONFIG;
312 if ((cs = strchr(comstring->s, '|'))) {
313 argv[1] = alloca(cs - comstring->s + 1);
314 strlcpy(argv[1], comstring->s, cs - comstring->s + 1);
315 addr = cs + 1;
316 } else {
317 *(const char **)&argv[1] =
318 string_param(j->intparams[IP_INTERFACE]);
319 addr = comstring->s;
320 }
321 *(const char **)&argv[2] = "inet";
322 if (!(cs = strchr(addr, '/'))) {
323 argv[3] = addr;
324 *(const char **)&argv[4] = "netmask";
325 *(const char **)&argv[5] = "255.255.255.255";
326 argc = 6;
327 } else if (strchr(cs + 1, '.')) {
328 argv[3] = alloca(cs - addr + 1);
329 strlcpy(argv[3], addr, cs - addr + 1);
330 *(const char **)&argv[4] = "netmask";
331 *(const char **)&argv[5] = cs + 1;
332 argc = 6;
333 } else {
334 argv[3] = addr;
335 argc = 4;
336 }
337 *(const char **)&argv[argc] = down ? "-alias" : "alias";
338 argv[argc + 1] = NULL;
339 break;
340#endif
341
342#ifdef INET6
343 case IP__IP6_IFADDR:
344 argv = alloca(8 * sizeof(char *));
345 *(const char **)&argv[0] = _PATH_IFCONFIG;
346 if ((cs = strchr(comstring->s, '|'))) {
347 argv[1] = alloca(cs - comstring->s + 1);
348 strlcpy(argv[1], comstring->s, cs - comstring->s + 1);
349 addr = cs + 1;
350 } else {
351 *(const char **)&argv[1] =
352 string_param(j->intparams[IP_INTERFACE]);
353 addr = comstring->s;
354 }
355 *(const char **)&argv[2] = "inet6";
356 argv[3] = addr;
357 if (!(cs = strchr(addr, '/'))) {
358 *(const char **)&argv[4] = "prefixlen";
359 *(const char **)&argv[5] = "128";
360 argc = 6;
361 } else
362 argc = 4;
363 *(const char **)&argv[argc] = down ? "-alias" : "alias";
364 argv[argc + 1] = NULL;
365 break;
366#endif
367
368 case IP_VNET_INTERFACE:
369 argv = alloca(5 * sizeof(char *));
370 *(const char **)&argv[0] = _PATH_IFCONFIG;
371 argv[1] = comstring->s;
372 *(const char **)&argv[2] = down ? "-vnet" : "vnet";
373 jidstr = string_param(j->intparams[KP_JID]);
374 *(const char **)&argv[3] =
375 jidstr ? jidstr : string_param(j->intparams[KP_NAME]);
376 argv[4] = NULL;
377 break;
378
379 case IP_MOUNT:
380 case IP__MOUNT_FROM_FSTAB:
381 argv = alloca(8 * sizeof(char *));
382 comcs = alloca(comstring->len + 1);
383 strcpy(comcs, comstring->s);
384 argc = 0;
385 for (cs = strtok(comcs, " \t\f\v\r\n"); cs && argc < 4;
386 cs = strtok(NULL, " \t\f\v\r\n"))
387 argv[argc++] = cs;
388 if (argc == 0)
389 return 0;
390 if (argc < 3) {
391 jail_warnx(j, "%s: %s: missing information",
392 j->intparams[comparam]->name, comstring->s);
393 return -1;
394 }
395 if (check_path(j, j->intparams[comparam]->name, argv[1], 0,
396 down ? argv[2] : NULL) < 0)
397 return -1;
398 if (down) {
399 argv[4] = NULL;
400 argv[3] = argv[1];
401 *(const char **)&argv[0] = "/sbin/umount";
402 } else {
403 if (argc == 4) {
404 argv[7] = NULL;
405 argv[6] = argv[1];
406 argv[5] = argv[0];
407 argv[4] = argv[3];
408 *(const char **)&argv[3] = "-o";
409 } else {
410 argv[5] = NULL;
411 argv[4] = argv[1];
412 argv[3] = argv[0];
413 }
414 *(const char **)&argv[0] = _PATH_MOUNT;
415 }
416 *(const char **)&argv[1] = "-t";
417 break;
418
419 case IP_MOUNT_DEVFS:
| 29
30#include <sys/types.h>
31#include <sys/event.h>
32#include <sys/mount.h>
33#include <sys/stat.h>
34#include <sys/sysctl.h>
35#include <sys/user.h>
36#include <sys/wait.h>
37
38#include <err.h>
39#include <errno.h>
40#include <fcntl.h>
41#include <kvm.h>
42#include <login_cap.h>
43#include <paths.h>
44#include <pwd.h>
45#include <signal.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <unistd.h>
50
51#include "jailp.h"
52
53#define DEFAULT_STOP_TIMEOUT 10
54#define PHASH_SIZE 256
55
56LIST_HEAD(phhead, phash);
57
58struct phash {
59 LIST_ENTRY(phash) le;
60 struct cfjail *j;
61 pid_t pid;
62};
63
64int paralimit = -1;
65
66extern char **environ;
67
68static int run_command(struct cfjail *j);
69static void add_proc(struct cfjail *j, pid_t pid);
70static void clear_procs(struct cfjail *j);
71static struct cfjail *find_proc(pid_t pid);
72static int term_procs(struct cfjail *j);
73static int get_user_info(struct cfjail *j, const char *username,
74 const struct passwd **pwdp, login_cap_t **lcapp);
75static int check_path(struct cfjail *j, const char *pname, const char *path,
76 int isfile, const char *umount_type);
77
78static struct cfjails sleeping = TAILQ_HEAD_INITIALIZER(sleeping);
79static struct cfjails runnable = TAILQ_HEAD_INITIALIZER(runnable);
80static struct cfstring dummystring = { .len = 1 };
81static struct phhead phash[PHASH_SIZE];
82static int kq;
83
84/*
85 * Run the next command associated with a jail.
86 */
87int
88next_command(struct cfjail *j)
89{
90 enum intparam comparam;
91 int create_failed;
92
93 if (paralimit == 0) {
94 requeue(j, &runnable);
95 return 1;
96 }
97 create_failed = (j->flags & (JF_STOP | JF_FAILED)) == JF_FAILED;
98 comparam = *j->comparam;
99 for (;;) {
100 if (j->comstring == NULL) {
101 j->comparam += create_failed ? -1 : 1;
102 switch ((comparam = *j->comparam)) {
103 case 0:
104 return 0;
105 case IP_MOUNT_DEVFS:
106 if (!bool_param(j->intparams[IP_MOUNT_DEVFS]))
107 continue;
108 /* FALLTHROUGH */
109 case IP__OP:
110 case IP_STOP_TIMEOUT:
111 j->comstring = &dummystring;
112 break;
113 default:
114 if (j->intparams[comparam] == NULL)
115 continue;
116 j->comstring = create_failed
117 ? TAILQ_LAST(&j->intparams[comparam]->val,
118 cfstrings)
119 : TAILQ_FIRST(&j->intparams[comparam]->val);
120 }
121 } else {
122 j->comstring = j->comstring == &dummystring ? NULL :
123 create_failed
124 ? TAILQ_PREV(j->comstring, cfstrings, tq)
125 : TAILQ_NEXT(j->comstring, tq);
126 }
127 if (j->comstring == NULL || j->comstring->len == 0 ||
128 (create_failed && (comparam == IP_EXEC_PRESTART ||
129 comparam == IP_EXEC_START || comparam == IP_COMMAND ||
130 comparam == IP_EXEC_POSTSTART)))
131 continue;
132 switch (run_command(j)) {
133 case -1:
134 failed(j);
135 /* FALLTHROUGH */
136 case 1:
137 return 1;
138 }
139 }
140}
141
142/*
143 * Check command exit status
144 */
145int
146finish_command(struct cfjail *j)
147{
148 int error;
149
150 if (!(j->flags & JF_SLEEPQ))
151 return 0;
152 j->flags &= ~JF_SLEEPQ;
153 if (*j->comparam == IP_STOP_TIMEOUT)
154 {
155 j->flags &= ~JF_TIMEOUT;
156 j->pstatus = 0;
157 return 0;
158 }
159 paralimit++;
160 if (!TAILQ_EMPTY(&runnable))
161 requeue(TAILQ_FIRST(&runnable), &ready);
162 error = 0;
163 if (j->flags & JF_TIMEOUT) {
164 j->flags &= ~JF_TIMEOUT;
165 if (*j->comparam != IP_STOP_TIMEOUT) {
166 jail_warnx(j, "%s: timed out", j->comline);
167 failed(j);
168 error = -1;
169 } else if (verbose > 0)
170 jail_note(j, "timed out\n");
171 } else if (j->pstatus != 0) {
172 if (WIFSIGNALED(j->pstatus))
173 jail_warnx(j, "%s: exited on signal %d",
174 j->comline, WTERMSIG(j->pstatus));
175 else
176 jail_warnx(j, "%s: failed", j->comline);
177 j->pstatus = 0;
178 failed(j);
179 error = -1;
180 }
181 free(j->comline);
182 j->comline = NULL;
183 return error;
184}
185
186/*
187 * Check for finished processes or timeouts.
188 */
189struct cfjail *
190next_proc(int nonblock)
191{
192 struct kevent ke;
193 struct timespec ts;
194 struct timespec *tsp;
195 struct cfjail *j;
196
197 if (!TAILQ_EMPTY(&sleeping)) {
198 again:
199 tsp = NULL;
200 if ((j = TAILQ_FIRST(&sleeping)) && j->timeout.tv_sec) {
201 clock_gettime(CLOCK_REALTIME, &ts);
202 ts.tv_sec = j->timeout.tv_sec - ts.tv_sec;
203 ts.tv_nsec = j->timeout.tv_nsec - ts.tv_nsec;
204 if (ts.tv_nsec < 0) {
205 ts.tv_sec--;
206 ts.tv_nsec += 1000000000;
207 }
208 if (ts.tv_sec < 0 ||
209 (ts.tv_sec == 0 && ts.tv_nsec == 0)) {
210 j->flags |= JF_TIMEOUT;
211 clear_procs(j);
212 return j;
213 }
214 tsp = &ts;
215 }
216 if (nonblock) {
217 ts.tv_sec = 0;
218 ts.tv_nsec = 0;
219 tsp = &ts;
220 }
221 switch (kevent(kq, NULL, 0, &ke, 1, tsp)) {
222 case -1:
223 if (errno != EINTR)
224 err(1, "kevent");
225 goto again;
226 case 0:
227 if (!nonblock) {
228 j = TAILQ_FIRST(&sleeping);
229 j->flags |= JF_TIMEOUT;
230 clear_procs(j);
231 return j;
232 }
233 break;
234 case 1:
235 (void)waitpid(ke.ident, NULL, WNOHANG);
236 if ((j = find_proc(ke.ident))) {
237 j->pstatus = ke.data;
238 return j;
239 }
240 goto again;
241 }
242 }
243 return NULL;
244}
245
246/*
247 * Run a single command for a jail, possible inside the jail.
248 */
249int
250run_command(struct cfjail *j)
251{
252 const struct passwd *pwd;
253 const struct cfstring *comstring, *s;
254 login_cap_t *lcap;
255 char **argv;
256 char *cs, *comcs, *devpath;
257 const char *jidstr, *conslog, *path, *ruleset, *term, *username;
258 enum intparam comparam;
259 size_t comlen;
260 pid_t pid;
261 int argc, bg, clean, consfd, down, fib, i, injail, sjuser, timeout;
262#if defined(INET) || defined(INET6)
263 char *addr;
264#endif
265
266 static char *cleanenv;
267
268 /* Perform some operations that aren't actually commands */
269 comparam = *j->comparam;
270 down = j->flags & (JF_STOP | JF_FAILED);
271 switch (comparam) {
272 case IP_STOP_TIMEOUT:
273 return term_procs(j);
274
275 case IP__OP:
276 if (down) {
277 if (jail_remove(j->jid) < 0 && errno == EPERM) {
278 jail_warnx(j, "jail_remove: %s",
279 strerror(errno));
280 return -1;
281 }
282 if (verbose > 0 || (verbose == 0 && (j->flags & JF_STOP
283 ? note_remove : j->name != NULL)))
284 jail_note(j, "removed\n");
285 j->jid = -1;
286 if (j->flags & JF_STOP)
287 dep_done(j, DF_LIGHT);
288 else
289 j->flags &= ~JF_PERSIST;
290 } else {
291 if (create_jail(j) < 0)
292 return -1;
293 if (verbose >= 0 && (j->name || verbose > 0))
294 jail_note(j, "created\n");
295 dep_done(j, DF_LIGHT);
296 }
297 return 0;
298
299 default: ;
300 }
301 /*
302 * Collect exec arguments. Internal commands for network and
303 * mounting build their own argument lists.
304 */
305 comstring = j->comstring;
306 bg = 0;
307 switch (comparam) {
308#ifdef INET
309 case IP__IP4_IFADDR:
310 argv = alloca(8 * sizeof(char *));
311 *(const char **)&argv[0] = _PATH_IFCONFIG;
312 if ((cs = strchr(comstring->s, '|'))) {
313 argv[1] = alloca(cs - comstring->s + 1);
314 strlcpy(argv[1], comstring->s, cs - comstring->s + 1);
315 addr = cs + 1;
316 } else {
317 *(const char **)&argv[1] =
318 string_param(j->intparams[IP_INTERFACE]);
319 addr = comstring->s;
320 }
321 *(const char **)&argv[2] = "inet";
322 if (!(cs = strchr(addr, '/'))) {
323 argv[3] = addr;
324 *(const char **)&argv[4] = "netmask";
325 *(const char **)&argv[5] = "255.255.255.255";
326 argc = 6;
327 } else if (strchr(cs + 1, '.')) {
328 argv[3] = alloca(cs - addr + 1);
329 strlcpy(argv[3], addr, cs - addr + 1);
330 *(const char **)&argv[4] = "netmask";
331 *(const char **)&argv[5] = cs + 1;
332 argc = 6;
333 } else {
334 argv[3] = addr;
335 argc = 4;
336 }
337 *(const char **)&argv[argc] = down ? "-alias" : "alias";
338 argv[argc + 1] = NULL;
339 break;
340#endif
341
342#ifdef INET6
343 case IP__IP6_IFADDR:
344 argv = alloca(8 * sizeof(char *));
345 *(const char **)&argv[0] = _PATH_IFCONFIG;
346 if ((cs = strchr(comstring->s, '|'))) {
347 argv[1] = alloca(cs - comstring->s + 1);
348 strlcpy(argv[1], comstring->s, cs - comstring->s + 1);
349 addr = cs + 1;
350 } else {
351 *(const char **)&argv[1] =
352 string_param(j->intparams[IP_INTERFACE]);
353 addr = comstring->s;
354 }
355 *(const char **)&argv[2] = "inet6";
356 argv[3] = addr;
357 if (!(cs = strchr(addr, '/'))) {
358 *(const char **)&argv[4] = "prefixlen";
359 *(const char **)&argv[5] = "128";
360 argc = 6;
361 } else
362 argc = 4;
363 *(const char **)&argv[argc] = down ? "-alias" : "alias";
364 argv[argc + 1] = NULL;
365 break;
366#endif
367
368 case IP_VNET_INTERFACE:
369 argv = alloca(5 * sizeof(char *));
370 *(const char **)&argv[0] = _PATH_IFCONFIG;
371 argv[1] = comstring->s;
372 *(const char **)&argv[2] = down ? "-vnet" : "vnet";
373 jidstr = string_param(j->intparams[KP_JID]);
374 *(const char **)&argv[3] =
375 jidstr ? jidstr : string_param(j->intparams[KP_NAME]);
376 argv[4] = NULL;
377 break;
378
379 case IP_MOUNT:
380 case IP__MOUNT_FROM_FSTAB:
381 argv = alloca(8 * sizeof(char *));
382 comcs = alloca(comstring->len + 1);
383 strcpy(comcs, comstring->s);
384 argc = 0;
385 for (cs = strtok(comcs, " \t\f\v\r\n"); cs && argc < 4;
386 cs = strtok(NULL, " \t\f\v\r\n"))
387 argv[argc++] = cs;
388 if (argc == 0)
389 return 0;
390 if (argc < 3) {
391 jail_warnx(j, "%s: %s: missing information",
392 j->intparams[comparam]->name, comstring->s);
393 return -1;
394 }
395 if (check_path(j, j->intparams[comparam]->name, argv[1], 0,
396 down ? argv[2] : NULL) < 0)
397 return -1;
398 if (down) {
399 argv[4] = NULL;
400 argv[3] = argv[1];
401 *(const char **)&argv[0] = "/sbin/umount";
402 } else {
403 if (argc == 4) {
404 argv[7] = NULL;
405 argv[6] = argv[1];
406 argv[5] = argv[0];
407 argv[4] = argv[3];
408 *(const char **)&argv[3] = "-o";
409 } else {
410 argv[5] = NULL;
411 argv[4] = argv[1];
412 argv[3] = argv[0];
413 }
414 *(const char **)&argv[0] = _PATH_MOUNT;
415 }
416 *(const char **)&argv[1] = "-t";
417 break;
418
419 case IP_MOUNT_DEVFS:
|
447 }
448 break;
449
450 case IP_COMMAND:
451 if (j->name != NULL)
452 goto default_command;
453 argc = 0;
454 TAILQ_FOREACH(s, &j->intparams[IP_COMMAND]->val, tq)
455 argc++;
456 argv = alloca((argc + 1) * sizeof(char *));
457 argc = 0;
458 TAILQ_FOREACH(s, &j->intparams[IP_COMMAND]->val, tq)
459 argv[argc++] = s->s;
460 argv[argc] = NULL;
461 j->comstring = &dummystring;
462 break;
463
464 default:
465 default_command:
466 if ((cs = strpbrk(comstring->s, "!\"$&'()*;<>?[\\]`{|}~")) &&
467 !(cs[0] == '&' && cs[1] == '\0')) {
468 argv = alloca(4 * sizeof(char *));
469 *(const char **)&argv[0] = _PATH_BSHELL;
470 *(const char **)&argv[1] = "-c";
471 argv[2] = comstring->s;
472 argv[3] = NULL;
473 } else {
474 if (cs) {
475 *cs = 0;
476 bg = 1;
477 }
478 comcs = alloca(comstring->len + 1);
479 strcpy(comcs, comstring->s);
480 argc = 0;
481 for (cs = strtok(comcs, " \t\f\v\r\n"); cs;
482 cs = strtok(NULL, " \t\f\v\r\n"))
483 argc++;
484 argv = alloca((argc + 1) * sizeof(char *));
485 strcpy(comcs, comstring->s);
486 argc = 0;
487 for (cs = strtok(comcs, " \t\f\v\r\n"); cs;
488 cs = strtok(NULL, " \t\f\v\r\n"))
489 argv[argc++] = cs;
490 argv[argc] = NULL;
491 }
492 }
493 if (argv[0] == NULL)
494 return 0;
495
496 if (int_param(j->intparams[IP_EXEC_TIMEOUT], &timeout) &&
497 timeout != 0) {
498 clock_gettime(CLOCK_REALTIME, &j->timeout);
499 j->timeout.tv_sec += timeout;
500 } else
501 j->timeout.tv_sec = 0;
502
503 injail = comparam == IP_EXEC_START || comparam == IP_COMMAND ||
504 comparam == IP_EXEC_STOP;
505 clean = bool_param(j->intparams[IP_EXEC_CLEAN]);
506 username = string_param(j->intparams[injail
507 ? IP_EXEC_JAIL_USER : IP_EXEC_SYSTEM_USER]);
508 sjuser = bool_param(j->intparams[IP_EXEC_SYSTEM_JAIL_USER]);
509
510 consfd = 0;
511 if (injail &&
512 (conslog = string_param(j->intparams[IP_EXEC_CONSOLELOG]))) {
513 if (check_path(j, "exec.consolelog", conslog, 1, NULL) < 0)
514 return -1;
515 consfd =
516 open(conslog, O_WRONLY | O_CREAT | O_APPEND, DEFFILEMODE);
517 if (consfd < 0) {
518 jail_warnx(j, "open %s: %s", conslog, strerror(errno));
519 return -1;
520 }
521 }
522
523 comlen = 0;
524 for (i = 0; argv[i]; i++)
525 comlen += strlen(argv[i]) + 1;
526 j->comline = cs = emalloc(comlen);
527 for (i = 0; argv[i]; i++) {
528 strcpy(cs, argv[i]);
529 if (argv[i + 1]) {
530 cs += strlen(argv[i]) + 1;
531 cs[-1] = ' ';
532 }
533 }
534 if (verbose > 0)
535 jail_note(j, "run command%s%s%s: %s\n",
536 injail ? " in jail" : "", username ? " as " : "",
537 username ? username : "", j->comline);
538
539 pid = fork();
540 if (pid < 0)
541 err(1, "fork");
542 if (pid > 0) {
543 if (bg) {
544 free(j->comline);
545 j->comline = NULL;
546 return 0;
547 } else {
548 paralimit--;
549 add_proc(j, pid);
550 return 1;
551 }
552 }
553 if (bg)
554 setsid();
555
556 /* Set up the environment and run the command */
557 pwd = NULL;
558 lcap = NULL;
559 if ((clean || username) && injail && sjuser &&
560 get_user_info(j, username, &pwd, &lcap) < 0)
561 exit(1);
562 if (injail) {
563 /* jail_attach won't chdir along with its chroot. */
564 path = string_param(j->intparams[KP_PATH]);
565 if (path && chdir(path) < 0) {
566 jail_warnx(j, "chdir %s: %s", path, strerror(errno));
567 exit(1);
568 }
569 if (int_param(j->intparams[IP_EXEC_FIB], &fib) &&
570 setfib(fib) < 0) {
571 jail_warnx(j, "setfib: %s", strerror(errno));
572 exit(1);
573 }
574 if (jail_attach(j->jid) < 0) {
575 jail_warnx(j, "jail_attach: %s", strerror(errno));
576 exit(1);
577 }
578 }
579 if (clean || username) {
580 if (!(injail && sjuser) &&
581 get_user_info(j, username, &pwd, &lcap) < 0)
582 exit(1);
583 if (clean) {
584 term = getenv("TERM");
585 environ = &cleanenv;
586 setenv("PATH", "/bin:/usr/bin", 0);
587 setenv("TERM", term, 1);
588 }
589 if (setusercontext(lcap, pwd, pwd->pw_uid, username
590 ? LOGIN_SETALL & ~LOGIN_SETGROUP & ~LOGIN_SETLOGIN
591 : LOGIN_SETPATH | LOGIN_SETENV) < 0) {
592 jail_warnx(j, "setusercontext %s: %s", pwd->pw_name,
593 strerror(errno));
594 exit(1);
595 }
596 login_close(lcap);
597 setenv("USER", pwd->pw_name, 1);
598 setenv("HOME", pwd->pw_dir, 1);
599 setenv("SHELL",
600 *pwd->pw_shell ? pwd->pw_shell : _PATH_BSHELL, 1);
601 if (clean && chdir(pwd->pw_dir) < 0) {
602 jail_warnx(j, "chdir %s: %s",
603 pwd->pw_dir, strerror(errno));
604 exit(1);
605 }
606 endpwent();
607 }
608
609 if (consfd != 0 && (dup2(consfd, 1) < 0 || dup2(consfd, 2) < 0)) {
610 jail_warnx(j, "exec.consolelog: %s", strerror(errno));
611 exit(1);
612 }
613 closefrom(3);
614 execvp(argv[0], argv);
615 jail_warnx(j, "exec %s: %s", argv[0], strerror(errno));
616 exit(1);
617}
618
619/*
620 * Add a process to the hash, tied to a jail.
621 */
622static void
623add_proc(struct cfjail *j, pid_t pid)
624{
625 struct kevent ke;
626 struct cfjail *tj;
627 struct phash *ph;
628
629 if (!kq && (kq = kqueue()) < 0)
630 err(1, "kqueue");
631 EV_SET(&ke, pid, EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, NULL);
632 if (kevent(kq, &ke, 1, NULL, 0, NULL) < 0)
633 err(1, "kevent");
634 ph = emalloc(sizeof(struct phash));
635 ph->j = j;
636 ph->pid = pid;
637 LIST_INSERT_HEAD(&phash[pid % PHASH_SIZE], ph, le);
638 j->nprocs++;
639 j->flags |= JF_SLEEPQ;
640 if (j->timeout.tv_sec == 0)
641 requeue(j, &sleeping);
642 else {
643 /* File the jail in the sleep queue acording to its timeout. */
644 TAILQ_REMOVE(j->queue, j, tq);
645 TAILQ_FOREACH(tj, &sleeping, tq) {
646 if (!tj->timeout.tv_sec ||
647 j->timeout.tv_sec < tj->timeout.tv_sec ||
648 (j->timeout.tv_sec == tj->timeout.tv_sec &&
649 j->timeout.tv_nsec <= tj->timeout.tv_nsec)) {
650 TAILQ_INSERT_BEFORE(tj, j, tq);
651 break;
652 }
653 }
654 if (tj == NULL)
655 TAILQ_INSERT_TAIL(&sleeping, j, tq);
656 j->queue = &sleeping;
657 }
658}
659
660/*
661 * Remove any processes from the hash that correspond to a jail.
662 */
663static void
664clear_procs(struct cfjail *j)
665{
666 struct kevent ke;
667 struct phash *ph, *tph;
668 int i;
669
670 j->nprocs = 0;
671 for (i = 0; i < PHASH_SIZE; i++)
672 LIST_FOREACH_SAFE(ph, &phash[i], le, tph)
673 if (ph->j == j) {
674 EV_SET(&ke, ph->pid, EVFILT_PROC, EV_DELETE,
675 NOTE_EXIT, 0, NULL);
676 (void)kevent(kq, &ke, 1, NULL, 0, NULL);
677 LIST_REMOVE(ph, le);
678 free(ph);
679 }
680}
681
682/*
683 * Find the jail that corresponds to an exited process.
684 */
685static struct cfjail *
686find_proc(pid_t pid)
687{
688 struct cfjail *j;
689 struct phash *ph;
690
691 LIST_FOREACH(ph, &phash[pid % PHASH_SIZE], le)
692 if (ph->pid == pid) {
693 j = ph->j;
694 LIST_REMOVE(ph, le);
695 free(ph);
696 return --j->nprocs ? NULL : j;
697 }
698 return NULL;
699}
700
701/*
702 * Send SIGTERM to all processes in a jail and wait for them to die.
703 */
704static int
705term_procs(struct cfjail *j)
706{
707 struct kinfo_proc *ki;
708 int i, noted, pcnt, timeout;
709
710 static kvm_t *kd;
711
712 if (!int_param(j->intparams[IP_STOP_TIMEOUT], &timeout))
713 timeout = DEFAULT_STOP_TIMEOUT;
714 else if (timeout == 0)
715 return 0;
716
717 if (kd == NULL) {
718 kd = kvm_open(NULL, NULL, NULL, O_RDONLY, NULL);
719 if (kd == NULL)
720 return 0;
721 }
722
723 ki = kvm_getprocs(kd, KERN_PROC_PROC, 0, &pcnt);
724 if (ki == NULL)
725 return 0;
726 noted = 0;
727 for (i = 0; i < pcnt; i++)
728 if (ki[i].ki_jid == j->jid &&
729 kill(ki[i].ki_pid, SIGTERM) == 0) {
730 add_proc(j, ki[i].ki_pid);
731 if (verbose > 0) {
732 if (!noted) {
733 noted = 1;
734 jail_note(j, "sent SIGTERM to:");
735 }
736 printf(" %d", ki[i].ki_pid);
737 }
738 }
739 if (noted)
740 printf("\n");
741 if (j->nprocs > 0) {
742 clock_gettime(CLOCK_REALTIME, &j->timeout);
743 j->timeout.tv_sec += timeout;
744 return 1;
745 }
746 return 0;
747}
748
749/*
750 * Look up a user in the passwd and login.conf files.
751 */
752static int
753get_user_info(struct cfjail *j, const char *username,
754 const struct passwd **pwdp, login_cap_t **lcapp)
755{
756 const struct passwd *pwd;
757
758 *pwdp = pwd = username ? getpwnam(username) : getpwuid(getuid());
759 if (pwd == NULL) {
760 if (errno)
761 jail_warnx(j, "getpwnam%s%s: %s", username ? " " : "",
762 username ? username : "", strerror(errno));
763 else if (username)
764 jail_warnx(j, "%s: no such user", username);
765 else
766 jail_warnx(j, "unknown uid %d", getuid());
767 return -1;
768 }
769 *lcapp = login_getpwclass(pwd);
770 if (*lcapp == NULL) {
771 jail_warnx(j, "getpwclass %s: %s", pwd->pw_name,
772 strerror(errno));
773 return -1;
774 }
775 /* Set the groups while the group file is still available */
776 if (initgroups(pwd->pw_name, pwd->pw_gid) < 0) {
777 jail_warnx(j, "initgroups %s: %s", pwd->pw_name,
778 strerror(errno));
779 return -1;
780 }
781 return 0;
782}
783
784/*
785 * Make sure a mount or consolelog path is a valid absolute pathname
786 * with no symlinks.
787 */
788static int
789check_path(struct cfjail *j, const char *pname, const char *path, int isfile,
790 const char *umount_type)
791{
792 struct stat st, mpst;
793 struct statfs stfs;
794 char *tpath, *p;
795 const char *jailpath;
796 size_t jplen;
797
798 if (path[0] != '/') {
799 jail_warnx(j, "%s: %s: not an absolute pathname",
800 pname, path);
801 return -1;
802 }
803 /*
804 * Only check for symlinks in components below the jail's path,
805 * since that's where the security risk lies.
806 */
807 jailpath = string_param(j->intparams[KP_PATH]);
808 if (jailpath == NULL)
809 jailpath = "";
810 jplen = strlen(jailpath);
811 if (!strncmp(path, jailpath, jplen) && path[jplen] == '/') {
812 tpath = alloca(strlen(path) + 1);
813 strcpy(tpath, path);
814 for (p = tpath + jplen; p != NULL; ) {
815 p = strchr(p + 1, '/');
816 if (p)
817 *p = '\0';
818 if (lstat(tpath, &st) < 0) {
819 if (errno == ENOENT && isfile && !p)
820 break;
821 jail_warnx(j, "%s: %s: %s", pname, tpath,
822 strerror(errno));
823 return -1;
824 }
825 if (S_ISLNK(st.st_mode)) {
826 jail_warnx(j, "%s: %s is a symbolic link",
827 pname, tpath);
828 return -1;
829 }
830 if (p)
831 *p = '/';
832 }
833 }
834 if (umount_type != NULL) {
835 if (stat(path, &st) < 0 || statfs(path, &stfs) < 0) {
836 jail_warnx(j, "%s: %s: %s", pname, path,
837 strerror(errno));
838 return -1;
839 }
840 if (stat(stfs.f_mntonname, &mpst) < 0) {
841 jail_warnx(j, "%s: %s: %s", pname, stfs.f_mntonname,
842 strerror(errno));
843 return -1;
844 }
845 if (st.st_ino != mpst.st_ino) {
846 jail_warnx(j, "%s: %s: not a mount point",
847 pname, path);
848 return -1;
849 }
850 if (strcmp(stfs.f_fstypename, umount_type)) {
851 jail_warnx(j, "%s: %s: not a %s mount",
852 pname, path, umount_type);
853 return -1;
854 }
855 }
856 return 0;
857}
| 447 }
448 break;
449
450 case IP_COMMAND:
451 if (j->name != NULL)
452 goto default_command;
453 argc = 0;
454 TAILQ_FOREACH(s, &j->intparams[IP_COMMAND]->val, tq)
455 argc++;
456 argv = alloca((argc + 1) * sizeof(char *));
457 argc = 0;
458 TAILQ_FOREACH(s, &j->intparams[IP_COMMAND]->val, tq)
459 argv[argc++] = s->s;
460 argv[argc] = NULL;
461 j->comstring = &dummystring;
462 break;
463
464 default:
465 default_command:
466 if ((cs = strpbrk(comstring->s, "!\"$&'()*;<>?[\\]`{|}~")) &&
467 !(cs[0] == '&' && cs[1] == '\0')) {
468 argv = alloca(4 * sizeof(char *));
469 *(const char **)&argv[0] = _PATH_BSHELL;
470 *(const char **)&argv[1] = "-c";
471 argv[2] = comstring->s;
472 argv[3] = NULL;
473 } else {
474 if (cs) {
475 *cs = 0;
476 bg = 1;
477 }
478 comcs = alloca(comstring->len + 1);
479 strcpy(comcs, comstring->s);
480 argc = 0;
481 for (cs = strtok(comcs, " \t\f\v\r\n"); cs;
482 cs = strtok(NULL, " \t\f\v\r\n"))
483 argc++;
484 argv = alloca((argc + 1) * sizeof(char *));
485 strcpy(comcs, comstring->s);
486 argc = 0;
487 for (cs = strtok(comcs, " \t\f\v\r\n"); cs;
488 cs = strtok(NULL, " \t\f\v\r\n"))
489 argv[argc++] = cs;
490 argv[argc] = NULL;
491 }
492 }
493 if (argv[0] == NULL)
494 return 0;
495
496 if (int_param(j->intparams[IP_EXEC_TIMEOUT], &timeout) &&
497 timeout != 0) {
498 clock_gettime(CLOCK_REALTIME, &j->timeout);
499 j->timeout.tv_sec += timeout;
500 } else
501 j->timeout.tv_sec = 0;
502
503 injail = comparam == IP_EXEC_START || comparam == IP_COMMAND ||
504 comparam == IP_EXEC_STOP;
505 clean = bool_param(j->intparams[IP_EXEC_CLEAN]);
506 username = string_param(j->intparams[injail
507 ? IP_EXEC_JAIL_USER : IP_EXEC_SYSTEM_USER]);
508 sjuser = bool_param(j->intparams[IP_EXEC_SYSTEM_JAIL_USER]);
509
510 consfd = 0;
511 if (injail &&
512 (conslog = string_param(j->intparams[IP_EXEC_CONSOLELOG]))) {
513 if (check_path(j, "exec.consolelog", conslog, 1, NULL) < 0)
514 return -1;
515 consfd =
516 open(conslog, O_WRONLY | O_CREAT | O_APPEND, DEFFILEMODE);
517 if (consfd < 0) {
518 jail_warnx(j, "open %s: %s", conslog, strerror(errno));
519 return -1;
520 }
521 }
522
523 comlen = 0;
524 for (i = 0; argv[i]; i++)
525 comlen += strlen(argv[i]) + 1;
526 j->comline = cs = emalloc(comlen);
527 for (i = 0; argv[i]; i++) {
528 strcpy(cs, argv[i]);
529 if (argv[i + 1]) {
530 cs += strlen(argv[i]) + 1;
531 cs[-1] = ' ';
532 }
533 }
534 if (verbose > 0)
535 jail_note(j, "run command%s%s%s: %s\n",
536 injail ? " in jail" : "", username ? " as " : "",
537 username ? username : "", j->comline);
538
539 pid = fork();
540 if (pid < 0)
541 err(1, "fork");
542 if (pid > 0) {
543 if (bg) {
544 free(j->comline);
545 j->comline = NULL;
546 return 0;
547 } else {
548 paralimit--;
549 add_proc(j, pid);
550 return 1;
551 }
552 }
553 if (bg)
554 setsid();
555
556 /* Set up the environment and run the command */
557 pwd = NULL;
558 lcap = NULL;
559 if ((clean || username) && injail && sjuser &&
560 get_user_info(j, username, &pwd, &lcap) < 0)
561 exit(1);
562 if (injail) {
563 /* jail_attach won't chdir along with its chroot. */
564 path = string_param(j->intparams[KP_PATH]);
565 if (path && chdir(path) < 0) {
566 jail_warnx(j, "chdir %s: %s", path, strerror(errno));
567 exit(1);
568 }
569 if (int_param(j->intparams[IP_EXEC_FIB], &fib) &&
570 setfib(fib) < 0) {
571 jail_warnx(j, "setfib: %s", strerror(errno));
572 exit(1);
573 }
574 if (jail_attach(j->jid) < 0) {
575 jail_warnx(j, "jail_attach: %s", strerror(errno));
576 exit(1);
577 }
578 }
579 if (clean || username) {
580 if (!(injail && sjuser) &&
581 get_user_info(j, username, &pwd, &lcap) < 0)
582 exit(1);
583 if (clean) {
584 term = getenv("TERM");
585 environ = &cleanenv;
586 setenv("PATH", "/bin:/usr/bin", 0);
587 setenv("TERM", term, 1);
588 }
589 if (setusercontext(lcap, pwd, pwd->pw_uid, username
590 ? LOGIN_SETALL & ~LOGIN_SETGROUP & ~LOGIN_SETLOGIN
591 : LOGIN_SETPATH | LOGIN_SETENV) < 0) {
592 jail_warnx(j, "setusercontext %s: %s", pwd->pw_name,
593 strerror(errno));
594 exit(1);
595 }
596 login_close(lcap);
597 setenv("USER", pwd->pw_name, 1);
598 setenv("HOME", pwd->pw_dir, 1);
599 setenv("SHELL",
600 *pwd->pw_shell ? pwd->pw_shell : _PATH_BSHELL, 1);
601 if (clean && chdir(pwd->pw_dir) < 0) {
602 jail_warnx(j, "chdir %s: %s",
603 pwd->pw_dir, strerror(errno));
604 exit(1);
605 }
606 endpwent();
607 }
608
609 if (consfd != 0 && (dup2(consfd, 1) < 0 || dup2(consfd, 2) < 0)) {
610 jail_warnx(j, "exec.consolelog: %s", strerror(errno));
611 exit(1);
612 }
613 closefrom(3);
614 execvp(argv[0], argv);
615 jail_warnx(j, "exec %s: %s", argv[0], strerror(errno));
616 exit(1);
617}
618
619/*
620 * Add a process to the hash, tied to a jail.
621 */
622static void
623add_proc(struct cfjail *j, pid_t pid)
624{
625 struct kevent ke;
626 struct cfjail *tj;
627 struct phash *ph;
628
629 if (!kq && (kq = kqueue()) < 0)
630 err(1, "kqueue");
631 EV_SET(&ke, pid, EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, NULL);
632 if (kevent(kq, &ke, 1, NULL, 0, NULL) < 0)
633 err(1, "kevent");
634 ph = emalloc(sizeof(struct phash));
635 ph->j = j;
636 ph->pid = pid;
637 LIST_INSERT_HEAD(&phash[pid % PHASH_SIZE], ph, le);
638 j->nprocs++;
639 j->flags |= JF_SLEEPQ;
640 if (j->timeout.tv_sec == 0)
641 requeue(j, &sleeping);
642 else {
643 /* File the jail in the sleep queue acording to its timeout. */
644 TAILQ_REMOVE(j->queue, j, tq);
645 TAILQ_FOREACH(tj, &sleeping, tq) {
646 if (!tj->timeout.tv_sec ||
647 j->timeout.tv_sec < tj->timeout.tv_sec ||
648 (j->timeout.tv_sec == tj->timeout.tv_sec &&
649 j->timeout.tv_nsec <= tj->timeout.tv_nsec)) {
650 TAILQ_INSERT_BEFORE(tj, j, tq);
651 break;
652 }
653 }
654 if (tj == NULL)
655 TAILQ_INSERT_TAIL(&sleeping, j, tq);
656 j->queue = &sleeping;
657 }
658}
659
660/*
661 * Remove any processes from the hash that correspond to a jail.
662 */
663static void
664clear_procs(struct cfjail *j)
665{
666 struct kevent ke;
667 struct phash *ph, *tph;
668 int i;
669
670 j->nprocs = 0;
671 for (i = 0; i < PHASH_SIZE; i++)
672 LIST_FOREACH_SAFE(ph, &phash[i], le, tph)
673 if (ph->j == j) {
674 EV_SET(&ke, ph->pid, EVFILT_PROC, EV_DELETE,
675 NOTE_EXIT, 0, NULL);
676 (void)kevent(kq, &ke, 1, NULL, 0, NULL);
677 LIST_REMOVE(ph, le);
678 free(ph);
679 }
680}
681
682/*
683 * Find the jail that corresponds to an exited process.
684 */
685static struct cfjail *
686find_proc(pid_t pid)
687{
688 struct cfjail *j;
689 struct phash *ph;
690
691 LIST_FOREACH(ph, &phash[pid % PHASH_SIZE], le)
692 if (ph->pid == pid) {
693 j = ph->j;
694 LIST_REMOVE(ph, le);
695 free(ph);
696 return --j->nprocs ? NULL : j;
697 }
698 return NULL;
699}
700
701/*
702 * Send SIGTERM to all processes in a jail and wait for them to die.
703 */
704static int
705term_procs(struct cfjail *j)
706{
707 struct kinfo_proc *ki;
708 int i, noted, pcnt, timeout;
709
710 static kvm_t *kd;
711
712 if (!int_param(j->intparams[IP_STOP_TIMEOUT], &timeout))
713 timeout = DEFAULT_STOP_TIMEOUT;
714 else if (timeout == 0)
715 return 0;
716
717 if (kd == NULL) {
718 kd = kvm_open(NULL, NULL, NULL, O_RDONLY, NULL);
719 if (kd == NULL)
720 return 0;
721 }
722
723 ki = kvm_getprocs(kd, KERN_PROC_PROC, 0, &pcnt);
724 if (ki == NULL)
725 return 0;
726 noted = 0;
727 for (i = 0; i < pcnt; i++)
728 if (ki[i].ki_jid == j->jid &&
729 kill(ki[i].ki_pid, SIGTERM) == 0) {
730 add_proc(j, ki[i].ki_pid);
731 if (verbose > 0) {
732 if (!noted) {
733 noted = 1;
734 jail_note(j, "sent SIGTERM to:");
735 }
736 printf(" %d", ki[i].ki_pid);
737 }
738 }
739 if (noted)
740 printf("\n");
741 if (j->nprocs > 0) {
742 clock_gettime(CLOCK_REALTIME, &j->timeout);
743 j->timeout.tv_sec += timeout;
744 return 1;
745 }
746 return 0;
747}
748
749/*
750 * Look up a user in the passwd and login.conf files.
751 */
752static int
753get_user_info(struct cfjail *j, const char *username,
754 const struct passwd **pwdp, login_cap_t **lcapp)
755{
756 const struct passwd *pwd;
757
758 *pwdp = pwd = username ? getpwnam(username) : getpwuid(getuid());
759 if (pwd == NULL) {
760 if (errno)
761 jail_warnx(j, "getpwnam%s%s: %s", username ? " " : "",
762 username ? username : "", strerror(errno));
763 else if (username)
764 jail_warnx(j, "%s: no such user", username);
765 else
766 jail_warnx(j, "unknown uid %d", getuid());
767 return -1;
768 }
769 *lcapp = login_getpwclass(pwd);
770 if (*lcapp == NULL) {
771 jail_warnx(j, "getpwclass %s: %s", pwd->pw_name,
772 strerror(errno));
773 return -1;
774 }
775 /* Set the groups while the group file is still available */
776 if (initgroups(pwd->pw_name, pwd->pw_gid) < 0) {
777 jail_warnx(j, "initgroups %s: %s", pwd->pw_name,
778 strerror(errno));
779 return -1;
780 }
781 return 0;
782}
783
784/*
785 * Make sure a mount or consolelog path is a valid absolute pathname
786 * with no symlinks.
787 */
788static int
789check_path(struct cfjail *j, const char *pname, const char *path, int isfile,
790 const char *umount_type)
791{
792 struct stat st, mpst;
793 struct statfs stfs;
794 char *tpath, *p;
795 const char *jailpath;
796 size_t jplen;
797
798 if (path[0] != '/') {
799 jail_warnx(j, "%s: %s: not an absolute pathname",
800 pname, path);
801 return -1;
802 }
803 /*
804 * Only check for symlinks in components below the jail's path,
805 * since that's where the security risk lies.
806 */
807 jailpath = string_param(j->intparams[KP_PATH]);
808 if (jailpath == NULL)
809 jailpath = "";
810 jplen = strlen(jailpath);
811 if (!strncmp(path, jailpath, jplen) && path[jplen] == '/') {
812 tpath = alloca(strlen(path) + 1);
813 strcpy(tpath, path);
814 for (p = tpath + jplen; p != NULL; ) {
815 p = strchr(p + 1, '/');
816 if (p)
817 *p = '\0';
818 if (lstat(tpath, &st) < 0) {
819 if (errno == ENOENT && isfile && !p)
820 break;
821 jail_warnx(j, "%s: %s: %s", pname, tpath,
822 strerror(errno));
823 return -1;
824 }
825 if (S_ISLNK(st.st_mode)) {
826 jail_warnx(j, "%s: %s is a symbolic link",
827 pname, tpath);
828 return -1;
829 }
830 if (p)
831 *p = '/';
832 }
833 }
834 if (umount_type != NULL) {
835 if (stat(path, &st) < 0 || statfs(path, &stfs) < 0) {
836 jail_warnx(j, "%s: %s: %s", pname, path,
837 strerror(errno));
838 return -1;
839 }
840 if (stat(stfs.f_mntonname, &mpst) < 0) {
841 jail_warnx(j, "%s: %s: %s", pname, stfs.f_mntonname,
842 strerror(errno));
843 return -1;
844 }
845 if (st.st_ino != mpst.st_ino) {
846 jail_warnx(j, "%s: %s: not a mount point",
847 pname, path);
848 return -1;
849 }
850 if (strcmp(stfs.f_fstypename, umount_type)) {
851 jail_warnx(j, "%s: %s: not a %s mount",
852 pname, path, umount_type);
853 return -1;
854 }
855 }
856 return 0;
857}
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