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 accomodate 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;
58 void kget(int idx, void *addr, size_t size);
60 struct nlist symbols[] = {
70 #define SHMINFO_XVEC X(shmmax, sizeof(u_long)) \
71 X(shmmin, sizeof(u_long)) \
72 X(shmmni, sizeof(u_long)) \
73 X(shmseg, sizeof(u_long)) \
74 X(shmall, sizeof(u_long))
76 #define SEMINFO_XVEC X(semmni, sizeof(int)) \
77 X(semmns, sizeof(int)) \
78 X(semmnu, sizeof(int)) \
79 X(semmsl, sizeof(int)) \
80 X(semopm, sizeof(int)) \
81 X(semume, sizeof(int)) \
82 X(semusz, sizeof(int)) \
83 X(semvmx, sizeof(int)) \
84 X(semaem, sizeof(int))
86 #define MSGINFO_XVEC X(msgmax, sizeof(int)) \
87 X(msgmni, sizeof(int)) \
88 X(msgmnb, sizeof(int)) \
89 X(msgtql, sizeof(int)) \
90 X(msgssz, sizeof(int)) \
91 X(msgseg, sizeof(int))
93 #define X(a, b) { "kern.ipc." #a, offsetof(TYPEC, a), (b) },
94 #define TYPEC struct shminfo
95 struct scgs_vector shminfo_scgsv[] = { SHMINFO_XVEC { NULL } };
97 #define TYPEC struct seminfo
98 struct scgs_vector seminfo_scgsv[] = { SEMINFO_XVEC { NULL } };
100 #define TYPEC struct msginfo
101 struct scgs_vector msginfo_scgsv[] = { MSGINFO_XVEC { NULL } };
108 sysctlgatherstruct(void *addr, size_t size, struct scgs_vector *vecarr)
110 struct scgs_vector *xp;
114 for (xp = vecarr; xp->sysctl != NULL; xp++) {
115 assert(xp->offset <= size);
117 rv = sysctlbyname(xp->sysctl, (char *)addr + xp->offset,
120 err(1, "sysctlbyname: %s", xp->sysctl);
121 if (tsiz != xp->size)
122 errx(1, "%s size mismatch (expected %zu, got %zu)",
123 xp->sysctl, xp->size, tsiz);
128 kget(int idx, void *addr, size_t size)
130 const char *symn; /* symbol name */
134 const char *sym2sysctl[] = { /* symbol to sysctl name table */
140 "kern.ipc.shmsegs" };
142 assert((unsigned)idx <= sizeof(sym2sysctl) / sizeof(*sym2sysctl));
144 symn = symbols[idx].n_name;
147 if (symbols[idx].n_type == 0 || symbols[idx].n_value == 0)
148 errx(1, "symbol %s undefined", symn);
150 * For some symbols, the value we retrieve is
151 * actually a pointer; since we want the actual value,
152 * we have to manually dereference it.
156 tsiz = sizeof(msqids);
157 rv = kvm_read(kd, symbols[idx].n_value,
159 kaddr = (u_long)msqids;
162 tsiz = sizeof(shmsegs);
163 rv = kvm_read(kd, symbols[idx].n_value,
165 kaddr = (u_long)shmsegs;
169 rv = kvm_read(kd, symbols[idx].n_value,
171 kaddr = (u_long)sema;
175 kaddr = symbols[idx].n_value;
178 if ((unsigned)rv != tsiz)
179 errx(1, "%s: %s", symn, kvm_geterr(kd));
180 if ((unsigned)kvm_read(kd, kaddr, addr, size) != size)
181 errx(1, "%s: %s", symn, kvm_geterr(kd));
185 sysctlgatherstruct(addr, size, shminfo_scgsv);
188 sysctlgatherstruct(addr, size, seminfo_scgsv);
191 sysctlgatherstruct(addr, size, msginfo_scgsv);
195 rv = sysctlbyname(sym2sysctl[idx], addr, &tsiz,
198 err(1, "sysctlbyname: %s", sym2sysctl[idx]);
200 errx(1, "%s size mismatch "
201 "(expected %zu, got %zu)",
202 sym2sysctl[idx], size, tsiz);