2 * Copyright (c) 1994 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 * The split of ipcs.c into ipcs.c and ipc.c to accommodate the
28 * changes in ipcrm.c was done by Edwin Groothuis <edwin@FreeBSD.org>
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/types.h>
35 #include <sys/sysctl.h>
52 struct semid_kernel *sema;
53 struct seminfo seminfo;
54 struct msginfo msginfo;
55 struct msqid_kernel *msqids;
56 struct shminfo shminfo;
57 struct shmid_kernel *shmsegs;
59 struct nlist symbols[] = {
61 { .n_name = "seminfo" },
62 { .n_name = "msginfo" },
63 { .n_name = "msqids" },
64 { .n_name = "shminfo" },
65 { .n_name = "shmsegs" },
69 #define SHMINFO_XVEC X(shmmax, sizeof(u_long)) \
70 X(shmmin, sizeof(u_long)) \
71 X(shmmni, sizeof(u_long)) \
72 X(shmseg, sizeof(u_long)) \
73 X(shmall, sizeof(u_long))
75 #define SEMINFO_XVEC X(semmni, sizeof(int)) \
76 X(semmns, sizeof(int)) \
77 X(semmnu, sizeof(int)) \
78 X(semmsl, sizeof(int)) \
79 X(semopm, sizeof(int)) \
80 X(semume, sizeof(int)) \
81 X(semusz, sizeof(int)) \
82 X(semvmx, sizeof(int)) \
83 X(semaem, sizeof(int))
85 #define MSGINFO_XVEC X(msgmax, sizeof(int)) \
86 X(msgmni, sizeof(int)) \
87 X(msgmnb, sizeof(int)) \
88 X(msgtql, sizeof(int)) \
89 X(msgssz, sizeof(int)) \
90 X(msgseg, sizeof(int))
92 #define X(a, b) { "kern.ipc." #a, offsetof(TYPEC, a), (b) },
93 #define TYPEC struct shminfo
94 static struct scgs_vector shminfo_scgsv[] = { SHMINFO_XVEC { .sysctl=NULL } };
96 #define TYPEC struct seminfo
97 static struct scgs_vector seminfo_scgsv[] = { SEMINFO_XVEC { .sysctl=NULL } };
99 #define TYPEC struct msginfo
100 static struct scgs_vector msginfo_scgsv[] = { MSGINFO_XVEC { .sysctl=NULL } };
107 sysctlgatherstruct(void *addr, size_t size, struct scgs_vector *vecarr)
109 struct scgs_vector *xp;
113 for (xp = vecarr; xp->sysctl != NULL; xp++) {
114 assert(xp->offset <= size);
116 rv = sysctlbyname(xp->sysctl, (char *)addr + xp->offset,
119 err(1, "sysctlbyname: %s", xp->sysctl);
120 if (tsiz != xp->size)
121 errx(1, "%s size mismatch (expected %zu, got %zu)",
122 xp->sysctl, xp->size, tsiz);
127 kget(int idx, void *addr, size_t size)
129 const char *symn; /* symbol name */
133 const char *sym2sysctl[] = { /* symbol to sysctl name table */
139 "kern.ipc.shmsegs" };
141 assert((unsigned)idx <= sizeof(sym2sysctl) / sizeof(*sym2sysctl));
143 symn = symbols[idx].n_name;
146 if (symbols[idx].n_type == 0 || symbols[idx].n_value == 0)
147 errx(1, "symbol %s undefined", symn);
149 * For some symbols, the value we retrieve is
150 * actually a pointer; since we want the actual value,
151 * we have to manually dereference it.
155 tsiz = sizeof(msqids);
156 rv = kvm_read(kd, symbols[idx].n_value,
158 kaddr = (u_long)msqids;
161 tsiz = sizeof(shmsegs);
162 rv = kvm_read(kd, symbols[idx].n_value,
164 kaddr = (u_long)shmsegs;
168 rv = kvm_read(kd, symbols[idx].n_value,
170 kaddr = (u_long)sema;
174 kaddr = symbols[idx].n_value;
177 if ((unsigned)rv != tsiz)
178 errx(1, "%s: %s", symn, kvm_geterr(kd));
179 if ((unsigned)kvm_read(kd, kaddr, addr, size) != size)
180 errx(1, "%s: %s", symn, kvm_geterr(kd));
184 sysctlgatherstruct(addr, size, shminfo_scgsv);
187 sysctlgatherstruct(addr, size, seminfo_scgsv);
190 sysctlgatherstruct(addr, size, msginfo_scgsv);
194 rv = sysctlbyname(sym2sysctl[idx], addr, &tsiz,
197 err(1, "sysctlbyname: %s", sym2sysctl[idx]);
199 errx(1, "%s size mismatch "
200 "(expected %zu, got %zu)",
201 sym2sysctl[idx], size, tsiz);