9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28
29 #pragma ident "%Z%%M% %I% %E% SMI"
30
31 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <sys/sysmacros.h>
34 #include <sys/systm.h>
35 #include <sys/errno.h>
36 #include <sys/proc.h>
37 #include <sys/procset.h>
38 #include <sys/fault.h>
39 #include <sys/signal.h>
40 #include <sys/siginfo.h>
41 #include <sys/debug.h>
42
43 static int
44 sigqkill(pid_t pid, sigsend_t *sigsend)
45 {
46 proc_t *p;
47 int error;
48
49 if ((uint_t)sigsend->sig >= NSIG)
50 return (EINVAL);
51
52 if (pid == -1) {
53 procset_t set;
54
55 setprocset(&set, POP_AND, P_ALL, P_MYID, P_ALL, P_MYID);
56 error = sigsendset(&set, sigsend);
57 } else if (pid > 0) {
58 mutex_enter(&pidlock);
59 if ((p = prfind(pid)) == NULL || p->p_stat == SIDL)
60 error = ESRCH;
61 else {
62 error = sigsendproc(p, sigsend);
116 * The handling of small unions, like the sigval argument to sigqueue,
117 * is architecture dependent. We have adopted the convention that the
118 * value itself is passed in the storage which crosses the kernel
119 * protection boundary. This procedure will accept a scalar argument,
120 * and store it in the appropriate value member of the sigsend_t structure.
121 */
122 int
123 sigqueue(pid_t pid, int sig, /* union sigval */ void *value,
124 int si_code, int block)
125 {
126 int error;
127 sigsend_t v;
128 sigqhdr_t *sqh;
129 proc_t *p = curproc;
130
131 /* The si_code value must indicate the signal will be queued */
132 if (pid <= 0 || !sigwillqueue(sig, si_code))
133 return (set_errno(EINVAL));
134
135 if ((sqh = p->p_sigqhdr) == NULL) {
136 /* Allocate sigqueue pool first time */
137 sqh = sigqhdralloc(sizeof (sigqueue_t), _SIGQUEUE_MAX);
138 mutex_enter(&p->p_lock);
139 if (p->p_sigqhdr == NULL) {
140 /* hang the pool head on proc */
141 p->p_sigqhdr = sqh;
142 } else {
143 /* another lwp allocated the pool, free ours */
144 sigqhdrfree(sqh);
145 sqh = p->p_sigqhdr;
146 }
147 mutex_exit(&p->p_lock);
148 }
149
150 do {
151 bzero(&v, sizeof (v));
152 v.sig = sig;
153 v.checkperm = 1;
154 v.sicode = si_code;
155 v.value.sival_ptr = value;
156 if ((error = sigqkill(pid, &v)) != EAGAIN || !block)
157 break;
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9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28
29 #include <sys/param.h>
30 #include <sys/types.h>
31 #include <sys/sysmacros.h>
32 #include <sys/systm.h>
33 #include <sys/errno.h>
34 #include <sys/proc.h>
35 #include <sys/procset.h>
36 #include <sys/fault.h>
37 #include <sys/signal.h>
38 #include <sys/siginfo.h>
39 #include <sys/debug.h>
40
41 extern rctl_hndl_t rc_process_sigqueue;
42
43 static int
44 sigqkill(pid_t pid, sigsend_t *sigsend)
45 {
46 proc_t *p;
47 int error;
48
49 if ((uint_t)sigsend->sig >= NSIG)
50 return (EINVAL);
51
52 if (pid == -1) {
53 procset_t set;
54
55 setprocset(&set, POP_AND, P_ALL, P_MYID, P_ALL, P_MYID);
56 error = sigsendset(&set, sigsend);
57 } else if (pid > 0) {
58 mutex_enter(&pidlock);
59 if ((p = prfind(pid)) == NULL || p->p_stat == SIDL)
60 error = ESRCH;
61 else {
62 error = sigsendproc(p, sigsend);
116 * The handling of small unions, like the sigval argument to sigqueue,
117 * is architecture dependent. We have adopted the convention that the
118 * value itself is passed in the storage which crosses the kernel
119 * protection boundary. This procedure will accept a scalar argument,
120 * and store it in the appropriate value member of the sigsend_t structure.
121 */
122 int
123 sigqueue(pid_t pid, int sig, /* union sigval */ void *value,
124 int si_code, int block)
125 {
126 int error;
127 sigsend_t v;
128 sigqhdr_t *sqh;
129 proc_t *p = curproc;
130
131 /* The si_code value must indicate the signal will be queued */
132 if (pid <= 0 || !sigwillqueue(sig, si_code))
133 return (set_errno(EINVAL));
134
135 if ((sqh = p->p_sigqhdr) == NULL) {
136 rlim64_t sigqsz_max;
137
138 mutex_enter(&p->p_lock);
139 sigqsz_max = rctl_enforced_value(rc_process_sigqueue,
140 p->p_rctls, p);
141 mutex_exit(&p->p_lock);
142
143 /* Allocate sigqueue pool first time */
144 sqh = sigqhdralloc(sizeof (sigqueue_t), (uint_t)sigqsz_max);
145 mutex_enter(&p->p_lock);
146 if (p->p_sigqhdr == NULL) {
147 /* hang the pool head on proc */
148 p->p_sigqhdr = sqh;
149 } else {
150 /* another lwp allocated the pool, free ours */
151 sigqhdrfree(sqh);
152 sqh = p->p_sigqhdr;
153 }
154 mutex_exit(&p->p_lock);
155 }
156
157 do {
158 bzero(&v, sizeof (v));
159 v.sig = sig;
160 v.checkperm = 1;
161 v.sicode = si_code;
162 v.value.sival_ptr = value;
163 if ((error = sigqkill(pid, &v)) != EAGAIN || !block)
164 break;
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