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freebsd-dev/usr.bin/ipcs/ipcs.c
Andriy Voskoboinyk 558fe07149 ipcs(1): drop obsolete error checking 
This code is not reached since r77551.

PR:		201728
MFC after:	5 days
2019-02-07 14:29:45 +00:00

559 lines
13 KiB
C
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1994 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/proc.h>
#define _WANT_SYSVMSG_INTERNALS
#include <sys/msg.h>
#define _WANT_SYSVSEM_INTERNALS
#include <sys/sem.h>
#define _WANT_SYSVSHM_INTERNALS
#include <sys/shm.h>
#include <err.h>
#include <fcntl.h>
#include <grp.h>
#include <kvm.h>
#include <limits.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ipc.h"
char *fmt_perm(u_short);
void cvt_time(time_t, char *);
void usage(void);
uid_t user2uid(char *username);
void print_kmsqtotal(struct msginfo msginfo);
void print_kmsqheader(int option);
void print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr);
void print_kshmtotal(struct shminfo shminfo);
void print_kshmheader(int option);
void print_kshmptr(int i, int option, struct shmid_kernel *kshmptr);
void print_ksemtotal(struct seminfo seminfo);
void print_ksemheader(int option);
void print_ksemptr(int i, int option, struct semid_kernel *ksemaptr);
char *
fmt_perm(u_short mode)
{
static char buffer[100];
buffer[0] = '-';
buffer[1] = '-';
buffer[2] = ((mode & 0400) ? 'r' : '-');
buffer[3] = ((mode & 0200) ? 'w' : '-');
buffer[4] = ((mode & 0100) ? 'a' : '-');
buffer[5] = ((mode & 0040) ? 'r' : '-');
buffer[6] = ((mode & 0020) ? 'w' : '-');
buffer[7] = ((mode & 0010) ? 'a' : '-');
buffer[8] = ((mode & 0004) ? 'r' : '-');
buffer[9] = ((mode & 0002) ? 'w' : '-');
buffer[10] = ((mode & 0001) ? 'a' : '-');
buffer[11] = '\0';
return (&buffer[0]);
}
void
cvt_time(time_t t, char *buf)
{
struct tm *tm;
if (t == 0) {
strcpy(buf, "no-entry");
} else {
tm = localtime(&t);
sprintf(buf, "%2d:%02d:%02d",
tm->tm_hour, tm->tm_min, tm->tm_sec);
}
}
#define BIGGEST 1
#define CREATOR 2
#define OUTSTANDING 4
#define PID 8
#define TIME 16
int
main(int argc, char *argv[])
{
int display = SHMINFO | MSGINFO | SEMINFO;
int option = 0;
char *core = NULL, *user = NULL, *namelist = NULL;
char kvmoferr[_POSIX2_LINE_MAX]; /* Error buf for kvm_openfiles. */
int i;
u_long shmidx;
uid_t uid = 0;
while ((i = getopt(argc, argv, "MmQqSsabC:cN:optTu:y")) != -1)
switch (i) {
case 'a':
option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME;
break;
case 'b':
option |= BIGGEST;
break;
case 'C':
core = optarg;
break;
case 'c':
option |= CREATOR;
break;
case 'M':
display = SHMTOTAL;
break;
case 'm':
display = SHMINFO;
break;
case 'N':
namelist = optarg;
break;
case 'o':
option |= OUTSTANDING;
break;
case 'p':
option |= PID;
break;
case 'Q':
display = MSGTOTAL;
break;
case 'q':
display = MSGINFO;
break;
case 'S':
display = SEMTOTAL;
break;
case 's':
display = SEMINFO;
break;
case 'T':
display = SHMTOTAL | MSGTOTAL | SEMTOTAL;
break;
case 't':
option |= TIME;
break;
case 'u':
user = optarg;
uid = user2uid(user);
break;
case 'y':
use_sysctl = 0;
break;
default:
usage();
}
/*
* If paths to the exec file or core file were specified, we
* aren't operating on the running kernel, so we can't use
* sysctl.
*/
if (namelist != NULL || core != NULL)
use_sysctl = 0;
if (!use_sysctl) {
kd = kvm_openfiles(namelist, core, NULL, O_RDONLY, kvmoferr);
if (kd == NULL)
errx(1, "kvm_openfiles: %s", kvmoferr);
switch (kvm_nlist(kd, symbols)) {
case 0:
break;
case -1:
errx(1, "unable to read kernel symbol table");
default:
break;
}
}
kget(X_MSGINFO, &msginfo, sizeof(msginfo));
if (display & (MSGINFO | MSGTOTAL)) {
if (display & MSGTOTAL)
print_kmsqtotal(msginfo);
if (display & MSGINFO) {
struct msqid_kernel *kxmsqids;
size_t kxmsqids_len;
kxmsqids_len =
sizeof(struct msqid_kernel) * msginfo.msgmni;
kxmsqids = malloc(kxmsqids_len);
kget(X_MSQIDS, kxmsqids, kxmsqids_len);
print_kmsqheader(option);
for (i = 0; i < msginfo.msgmni; i += 1) {
if (kxmsqids[i].u.msg_qbytes != 0) {
if (user &&
uid != kxmsqids[i].u.msg_perm.uid)
continue;
print_kmsqptr(i, option, &kxmsqids[i]);
}
}
printf("\n");
}
}
kget(X_SHMINFO, &shminfo, sizeof(shminfo));
if (display & (SHMINFO | SHMTOTAL)) {
if (display & SHMTOTAL)
print_kshmtotal(shminfo);
if (display & SHMINFO) {
struct shmid_kernel *kxshmids;
size_t kxshmids_len;
kxshmids_len =
sizeof(struct shmid_kernel) * shminfo.shmmni;
kxshmids = malloc(kxshmids_len);
kget(X_SHMSEGS, kxshmids, kxshmids_len);
print_kshmheader(option);
for (shmidx = 0; shmidx < shminfo.shmmni; shmidx += 1) {
if (kxshmids[shmidx].u.shm_perm.mode & 0x0800) {
if (user &&
uid != kxshmids[shmidx].u.shm_perm.uid)
continue;
print_kshmptr(shmidx, option, &kxshmids[shmidx]);
}
}
printf("\n");
}
}
kget(X_SEMINFO, &seminfo, sizeof(seminfo));
if (display & (SEMINFO | SEMTOTAL)) {
struct semid_kernel *kxsema;
size_t kxsema_len;
if (display & SEMTOTAL)
print_ksemtotal(seminfo);
if (display & SEMINFO) {
kxsema_len =
sizeof(struct semid_kernel) * seminfo.semmni;
kxsema = malloc(kxsema_len);
kget(X_SEMA, kxsema, kxsema_len);
print_ksemheader(option);
for (i = 0; i < seminfo.semmni; i += 1) {
if ((kxsema[i].u.sem_perm.mode & SEM_ALLOC)
!= 0) {
if (user &&
uid != kxsema[i].u.sem_perm.uid)
continue;
print_ksemptr(i, option, &kxsema[i]);
}
}
printf("\n");
}
}
if (!use_sysctl)
kvm_close(kd);
exit(0);
}
void
print_kmsqtotal(struct msginfo local_msginfo)
{
printf("msginfo:\n");
printf("\tmsgmax: %12d\t(max characters in a message)\n",
local_msginfo.msgmax);
printf("\tmsgmni: %12d\t(# of message queues)\n",
local_msginfo.msgmni);
printf("\tmsgmnb: %12d\t(max characters in a message queue)\n",
local_msginfo.msgmnb);
printf("\tmsgtql: %12d\t(max # of messages in system)\n",
local_msginfo.msgtql);
printf("\tmsgssz: %12d\t(size of a message segment)\n",
local_msginfo.msgssz);
printf("\tmsgseg: %12d\t(# of message segments in system)\n\n",
local_msginfo.msgseg);
}
void print_kmsqheader(int option)
{
printf("Message Queues:\n");
printf("T %12s %12s %-11s %-8s %-8s",
"ID", "KEY", "MODE", "OWNER", "GROUP");
if (option & CREATOR)
printf(" %-8s %-8s", "CREATOR", "CGROUP");
if (option & OUTSTANDING)
printf(" %20s %20s", "CBYTES", "QNUM");
if (option & BIGGEST)
printf(" %20s", "QBYTES");
if (option & PID)
printf(" %12s %12s", "LSPID", "LRPID");
if (option & TIME)
printf(" %-8s %-8s %-8s", "STIME", "RTIME", "CTIME");
printf("\n");
}
void
print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr)
{
char stime_buf[100], rtime_buf[100], ctime_buf[100];
cvt_time(kmsqptr->u.msg_stime, stime_buf);
cvt_time(kmsqptr->u.msg_rtime, rtime_buf);
cvt_time(kmsqptr->u.msg_ctime, ctime_buf);
printf("q %12d %12d %s %-8s %-8s",
IXSEQ_TO_IPCID(i, kmsqptr->u.msg_perm),
(int)kmsqptr->u.msg_perm.key,
fmt_perm(kmsqptr->u.msg_perm.mode),
user_from_uid(kmsqptr->u.msg_perm.uid, 0),
group_from_gid(kmsqptr->u.msg_perm.gid, 0));
if (option & CREATOR)
printf(" %-8s %-8s",
user_from_uid(kmsqptr->u.msg_perm.cuid, 0),
group_from_gid(kmsqptr->u.msg_perm.cgid, 0));
if (option & OUTSTANDING)
printf(" %12lu %12lu",
kmsqptr->u.msg_cbytes,
kmsqptr->u.msg_qnum);
if (option & BIGGEST)
printf(" %20lu", kmsqptr->u.msg_qbytes);
if (option & PID)
printf(" %12d %12d",
kmsqptr->u.msg_lspid,
kmsqptr->u.msg_lrpid);
if (option & TIME)
printf(" %s %s %s",
stime_buf,
rtime_buf,
ctime_buf);
printf("\n");
}
void
print_kshmtotal(struct shminfo local_shminfo)
{
printf("shminfo:\n");
printf("\tshmmax: %12lu\t(max shared memory segment size)\n",
local_shminfo.shmmax);
printf("\tshmmin: %12lu\t(min shared memory segment size)\n",
local_shminfo.shmmin);
printf("\tshmmni: %12lu\t(max number of shared memory identifiers)\n",
local_shminfo.shmmni);
printf("\tshmseg: %12lu\t(max shared memory segments per process)\n",
local_shminfo.shmseg);
printf("\tshmall: %12lu\t(max amount of shared memory in pages)\n\n",
local_shminfo.shmall);
}
void
print_kshmheader(int option)
{
printf("Shared Memory:\n");
printf("T %12s %12s %-11s %-8s %-8s",
"ID", "KEY", "MODE", "OWNER", "GROUP");
if (option & CREATOR)
printf(" %-8s %-8s", "CREATOR", "CGROUP");
if (option & OUTSTANDING)
printf(" %12s", "NATTCH");
if (option & BIGGEST)
printf(" %12s", "SEGSZ");
if (option & PID)
printf(" %12s %12s", "CPID", "LPID");
if (option & TIME)
printf(" %-8s %-8s %-8s", "ATIME", "DTIME", "CTIME");
printf("\n");
}
void
print_kshmptr(int i, int option, struct shmid_kernel *kshmptr)
{
char atime_buf[100], dtime_buf[100], ctime_buf[100];
cvt_time(kshmptr->u.shm_atime, atime_buf);
cvt_time(kshmptr->u.shm_dtime, dtime_buf);
cvt_time(kshmptr->u.shm_ctime, ctime_buf);
printf("m %12d %12d %s %-8s %-8s",
IXSEQ_TO_IPCID(i, kshmptr->u.shm_perm),
(int)kshmptr->u.shm_perm.key,
fmt_perm(kshmptr->u.shm_perm.mode),
user_from_uid(kshmptr->u.shm_perm.uid, 0),
group_from_gid(kshmptr->u.shm_perm.gid, 0));
if (option & CREATOR)
printf(" %-8s %-8s",
user_from_uid(kshmptr->u.shm_perm.cuid, 0),
group_from_gid(kshmptr->u.shm_perm.cgid, 0));
if (option & OUTSTANDING)
printf(" %12d",
kshmptr->u.shm_nattch);
if (option & BIGGEST)
printf(" %12zu",
kshmptr->u.shm_segsz);
if (option & PID)
printf(" %12d %12d",
kshmptr->u.shm_cpid,
kshmptr->u.shm_lpid);
if (option & TIME)
printf(" %s %s %s",
atime_buf,
dtime_buf,
ctime_buf);
printf("\n");
}
void
print_ksemtotal(struct seminfo local_seminfo)
{
printf("seminfo:\n");
printf("\tsemmni: %12d\t(# of semaphore identifiers)\n",
local_seminfo.semmni);
printf("\tsemmns: %12d\t(# of semaphores in system)\n",
local_seminfo.semmns);
printf("\tsemmnu: %12d\t(# of undo structures in system)\n",
local_seminfo.semmnu);
printf("\tsemmsl: %12d\t(max # of semaphores per id)\n",
local_seminfo.semmsl);
printf("\tsemopm: %12d\t(max # of operations per semop call)\n",
local_seminfo.semopm);
printf("\tsemume: %12d\t(max # of undo entries per process)\n",
local_seminfo.semume);
printf("\tsemusz: %12d\t(size in bytes of undo structure)\n",
local_seminfo.semusz);
printf("\tsemvmx: %12d\t(semaphore maximum value)\n",
local_seminfo.semvmx);
printf("\tsemaem: %12d\t(adjust on exit max value)\n\n",
local_seminfo.semaem);
}
void
print_ksemheader(int option)
{
printf("Semaphores:\n");
printf("T %12s %12s %-11s %-8s %-8s",
"ID", "KEY", "MODE", "OWNER", "GROUP");
if (option & CREATOR)
printf(" %-8s %-8s", "CREATOR", "CGROUP");
if (option & BIGGEST)
printf(" %12s", "NSEMS");
if (option & TIME)
printf(" %-8s %-8s", "OTIME", "CTIME");
printf("\n");
}
void
print_ksemptr(int i, int option, struct semid_kernel *ksemaptr)
{
char ctime_buf[100], otime_buf[100];
cvt_time(ksemaptr->u.sem_otime, otime_buf);
cvt_time(ksemaptr->u.sem_ctime, ctime_buf);
printf("s %12d %12d %s %-8s %-8s",
IXSEQ_TO_IPCID(i, ksemaptr->u.sem_perm),
(int)ksemaptr->u.sem_perm.key,
fmt_perm(ksemaptr->u.sem_perm.mode),
user_from_uid(ksemaptr->u.sem_perm.uid, 0),
group_from_gid(ksemaptr->u.sem_perm.gid, 0));
if (option & CREATOR)
printf(" %-8s %-8s",
user_from_uid(ksemaptr->u.sem_perm.cuid, 0),
group_from_gid(ksemaptr->u.sem_perm.cgid, 0));
if (option & BIGGEST)
printf(" %12d",
ksemaptr->u.sem_nsems);
if (option & TIME)
printf(" %s %s",
otime_buf,
ctime_buf);
printf("\n");
}
uid_t
user2uid(char *username)
{
struct passwd *pwd;
uid_t uid;
char *r;
uid = strtoul(username, &r, 0);
if (!*r && r != username)
return (uid);
if ((pwd = getpwnam(username)) == NULL)
errx(1, "getpwnam failed: No such user");
endpwent();
return (pwd->pw_uid);
}
void
usage(void)
{
fprintf(stderr,
"usage: "
"ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist] [-u user]\n");
exit(1);
}
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