Added from FreeBSD-1.1.5 with some additions to list shared memory segments.
This commit is contained in:
Doug Rabson
parent
5b65bca24e
commit
4816f94e8a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=2731
9
usr.bin/ipcs/Makefile
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9
usr.bin/ipcs/Makefile
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@ -0,0 +1,9 @@
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# @(#)Makefile 5.2 (Berkeley) 5/11/90
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PROG= ipcs
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NOMAN= noman
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BINMODE = 2555
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BINGRP = kmem
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CFLAGS=-g
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.include <bsd.prog.mk>
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374
usr.bin/ipcs/ipcs.c
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374
usr.bin/ipcs/ipcs.c
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/*
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* Simplified implementation of SYSV ipcs.
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*/
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#include <nlist.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <paths.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/proc.h>
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#define KERNEL
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#include <sys/ipc.h>
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#include <sys/sem.h>
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#include <sys/shm.h>
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#include <sys/msg.h>
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#define SHMSEG_FREE 0x0200
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#define SHMSEG_REMOVED 0x0400
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#define SHMSEG_ALLOCATED 0x0800
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#define SHMSEG_WANTED 0x1000
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static kmem_fd;
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getsymbol(struct nlist *symbols, char *symname, void *dptr, int len)
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{
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int i, rlen;
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for ( i = 0; symbols[i].n_name != NULL; i += 1 ) {
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if ( strcmp(symbols[i].n_name,symname) == 0 ) {
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break;
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}
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}
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if ( symbols[i].n_name == NULL ) {
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fprintf(stderr,"ipcs(getsymbol): symbol %s not in local symbols list\n",
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symname);
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exit(1);
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}
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if ( symbols[i].n_value == NULL ) {
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fprintf(stderr,"ipcs(getsymbol): symbol %s not in %s\n",
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symname,_PATH_UNIX);
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return(0);
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}
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if ( kmem_fd == 0 ) {
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kmem_fd = open("/dev/kmem",0);
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if ( kmem_fd < 0 ) {
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perror("ipcs(getsymbol(open /dev/kmem))");
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exit(1);
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}
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}
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lseek(kmem_fd,symbols[i].n_value,SEEK_SET);
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if ( (rlen = read(kmem_fd,dptr,len)) != len ) {
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fprintf(stderr,"ipcs(getsymbol): can't fetch symbol %s from /dev/kmem\n",symname);
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exit(1);
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}
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return(1);
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}
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void
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getlocation(void *addr, void *dptr, int len)
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{
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int i, rlen;
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if ( kmem_fd == 0 ) {
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kmem_fd = open("/dev/kmem",0);
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if ( kmem_fd < 0 ) {
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perror("ipcs(getlocation(open /dev/kmem))");
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exit(1);
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}
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}
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lseek(kmem_fd,(long)addr,SEEK_SET);
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if ( (rlen = read(kmem_fd,dptr,len)) != len ) {
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fprintf(stderr,"ipcs(getlocation): can't fetch location %08x from /dev/kmem\n",addr);
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exit(1);
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}
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}
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char *
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fmt_perm(ushort mode)
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{
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static char buffer[100];
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buffer[0] = '-';
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buffer[1] = '-';
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buffer[2] = ((mode & 0400) ? 'r' : '-');
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buffer[3] = ((mode & 0200) ? 'w' : '-');
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buffer[4] = ((mode & 0100) ? 'a' : '-');
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buffer[5] = ((mode & 0040) ? 'r' : '-');
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buffer[6] = ((mode & 0020) ? 'w' : '-');
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buffer[7] = ((mode & 0010) ? 'a' : '-');
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buffer[8] = ((mode & 0004) ? 'r' : '-');
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buffer[9] = ((mode & 0002) ? 'w' : '-');
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buffer[10] = ((mode & 0001) ? 'a' : '-');
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buffer[11] = '\0';
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return(&buffer[0]);
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}
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void
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cvt_time(time_t t,char *buf)
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{
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struct tm tms;
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static char *months[] = {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
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if ( t == 0 ) {
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strcpy(buf,"<not set>");
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} else {
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tms = *localtime(&t);
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if ( t > time(0) - 6 * 30 * 24 * 3600 ) { /* less than about 6 months ago? */
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sprintf(buf,"%s %2d %2d:%2d",
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months[tms.tm_mon],tms.tm_mday,tms.tm_hour,tms.tm_min);
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} else {
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sprintf(buf,"%s %2d %5d",
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months[tms.tm_mon],tms.tm_mday,tms.tm_year+1900);
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}
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}
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}
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main()
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{
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static struct nlist symbols[] = {
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{ "_sema" },
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{ "_seminfo" },
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{ "_semu" },
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{ "_msginfo" },
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{ "_msqids" },
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{ "_shminfo" },
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{ "_shmsegs" },
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{ NULL }
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};
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int i;
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int show_sem_values = 1;
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int show_undo_values = 1;
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switch ( nlist(_PATH_UNIX,&symbols[0]) ) {
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case 0: break;
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case -1:
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fprintf(stderr,"ipcs: can't open %s - bye!\n",_PATH_UNIX);
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exit(1);
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default:
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fprintf(stderr,"ipcs: nlist failed\n");
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for ( i = 0; symbols[i].n_name != NULL; i += 1 ) {
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if ( symbols[i].n_value == 0 ) {
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fprintf(stderr,"\tsymbol %s not found\n",symbols[i].n_name);
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}
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}
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break;
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}
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/*
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for ( i = 0; symbols[i].n_name != NULL; i += 1 ) {
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fprintf(stderr,"\t%s : %08x\n",symbols[i].n_name,symbols[i].n_value);
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}
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*/
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if ( getsymbol(symbols,"_shminfo",&shminfo,sizeof(shminfo)) ) {
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struct shmid_ds* xshm;
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struct shminfo {
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int shmmax, /* max shared memory segment size (bytes) */
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shmmin, /* min shared memory segment size (bytes) */
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shmmni, /* max number of shared memory identifiers */
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shmseg, /* max shared memory segments per process */
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shmall; /* max amount of shared memory (pages) */
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};
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printf("shminfo:\n");
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printf("\tshmmax: %6d\t(max size of a shared memory segment)\n", shminfo.shmmax);
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printf("\tshmmin: %6d\t(min size of a shared memory segment)\n", shminfo.shmmin);
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printf("\tshmmni: %6d\t(max # of shared memory segments)\n", shminfo.shmmni);
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printf("\tshmseg: %6d\t(max # of shared memory segments per process)\n", shminfo.shmseg);
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printf("\tshmall: %6d\t(# of shared memory pages available)\n", shminfo.shmall);
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getsymbol(symbols, "_shmsegs", &shmsegs, sizeof(shmsegs));
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xshm = malloc(sizeof(struct shmid_ds) * shminfo.shmmni);
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getlocation(shmsegs,xshm,sizeof(struct shmid_ds) * shminfo.shmmni);
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for ( i = 0; i < shminfo.shmmni; i += 1 ) {
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if ( (xshm[i].shm_perm.mode & SHMSEG_ALLOCATED) != 0 ) {
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char ctime_buf[100], atime_buf[100];
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struct shmid_ds* shmaptr = &xshm[i];
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cvt_time(shmaptr->shm_ctime,ctime_buf);
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cvt_time(shmaptr->shm_atime,atime_buf);
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printf("\nshma id: %d key: 0x%08x:\n",
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IXSEQ_TO_IPCID(i,shmaptr->shm_perm),
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shmaptr->shm_perm.key);
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printf(" cuid: %6d cgid: %6d ctime: %s\n",
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shmaptr->shm_perm.cuid,shmaptr->shm_perm.cgid,ctime_buf);
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printf(" uid: %6d gid: %6d atime: %s\n",
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shmaptr->shm_perm.uid,shmaptr->shm_perm.gid,atime_buf);
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printf(" size: %6d attach:%6d perm: %s\n",
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shmaptr->shm_segsz,shmaptr->shm_nattch,fmt_perm(shmaptr->shm_perm.mode));
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}
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}
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}
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if ( getsymbol(symbols,"_seminfo",&seminfo,sizeof(seminfo)) ) {
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struct semid_ds *xsema;
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printf("\nseminfo:\n");
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printf("\tsemmap: %6d\t(# of entries in semaphore map)\n",seminfo.semmap);
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printf("\tsemmni: %6d\t(# of semaphore identifiers)\n",seminfo.semmni);
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printf("\tsemmns: %6d\t(# of semaphores in system)\n",seminfo.semmns);
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printf("\tsemmnu: %6d\t(# of undo structures in system)\n",seminfo.semmnu);
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printf("\tsemmsl: %6d\t(max # of semaphores per id)\n",seminfo.semmsl);
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printf("\tsemopm: %6d\t(max # of operations per semop call)\n",seminfo.semopm);
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printf("\tsemume: %6d\t(max # of undo entries per process)\n",seminfo.semume);
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printf("\tsemusz: %6d\t(size in bytes of undo structure)\n",seminfo.semusz);
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printf("\tsemvmx: %6d\t(semaphore maximum value)\n",seminfo.semvmx);
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printf("\tsemaem: %6d\t(adjust on exit max value)\n",seminfo.semaem);
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/*
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* Lock out other users of the semaphore facility
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*/
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if ( semconfig(SEM_CONFIG_FREEZE) != 0 ) {
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perror("semconfig");
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fprintf(stderr,"Can't lock semaphore facility - winging it...\n");
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}
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getsymbol(symbols,"_sema",&sema,sizeof(sema));
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xsema = malloc(sizeof(struct semid_ds) * seminfo.semmni);
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getlocation(sema,xsema,sizeof(struct semid_ds) * seminfo.semmni);
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for ( i = 0; i < seminfo.semmni; i += 1 ) {
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if ( (xsema[i].sem_perm.mode & SEM_ALLOC) != 0 ) {
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char ctime_buf[100], otime_buf[100];
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struct semid_ds *semaptr = &xsema[i];
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cvt_time(semaptr->sem_ctime,ctime_buf);
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cvt_time(semaptr->sem_otime,otime_buf);
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printf("\nsema id: %d key: 0x%08x:\n",
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IXSEQ_TO_IPCID(i,semaptr->sem_perm),
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semaptr->sem_perm.key);
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printf(" cuid: %6d cgid: %6d ctime: %s\n",
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semaptr->sem_perm.cuid,semaptr->sem_perm.cgid,ctime_buf);
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printf(" uid: %6d gid: %6d otime: %s\n",
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semaptr->sem_perm.uid,semaptr->sem_perm.gid,otime_buf);
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printf(" nsems: %6d perm: %s\n",
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semaptr->sem_nsems,fmt_perm(semaptr->sem_perm.mode));
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if ( show_sem_values ) {
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int j, value;
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union semun junk;
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for ( j = 0; j < semaptr->sem_nsems; j += 1 ) {
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if ( (value = semctl( IXSEQ_TO_IPCID(i,semaptr->sem_perm), j, GETVAL, junk )) < 0 ) {
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printf("can't get semaphore values\n");
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break;
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}
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if ( j % 5 == 0 ) {
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if ( j == 0 ) {
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printf(" values: {");
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} else {
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printf("\n");
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printf(" ");
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}
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}
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printf(" %d",value);
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if ( j == semaptr->sem_nsems - 1 ) {
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printf(" }\n");
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} else {
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printf(", ");
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}
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}
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}
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}
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}
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if ( show_undo_values ) {
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int j;
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int *ksemu, *semu;
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int semu_size;
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int got_one_undo = 0;
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semu = 0;
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semu_size = (int)SEMU(seminfo.semmnu);
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semu = (int *)malloc( semu_size );
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getsymbol(symbols,"_semu",&ksemu,sizeof(ksemu));
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getlocation(ksemu,semu,semu_size);
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printf("\nsem undos:\n");
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for ( j = 0; j < seminfo.semmnu; j += 1 ) {
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struct sem_undo *suptr;
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int k;
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suptr = SEMU(j);
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if ( suptr->un_proc != NULL ) {
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struct proc proc;
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getlocation(suptr->un_proc,&proc,sizeof(proc));
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got_one_undo = 1;
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printf(" pid %d: semid semnum adjval\n",proc.p_pid);
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for ( k = 0; k < suptr->un_cnt; k += 1 ) {
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printf(" %10d %5d %6d\n",
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IXSEQ_TO_IPCID(suptr->un_ent[k].un_id,xsema[suptr->un_ent[k].un_id].sem_perm),
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suptr->un_ent[k].un_num,
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suptr->un_ent[k].un_adjval);
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}
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}
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}
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if ( !got_one_undo ) {
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printf(" none allocated\n");
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}
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}
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(void)semconfig(SEM_CONFIG_THAW);
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} else {
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fprintf(stderr,"SVID semaphores facility not configured in the system\n");
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}
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if ( getsymbol(symbols,"_msginfo",&msginfo,sizeof(msginfo)) ) {
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struct msqid_ds *xmsqids;
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printf("\nmsginfo:\n");
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printf("\tmsgmax: %6d\t(max characters in a message)\n",msginfo.msgmax);
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printf("\tmsgmni: %6d\t(# of message queues)\n",msginfo.msgmni);
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printf("\tmsgmnb: %6d\t(max characters in a message queue)\n",msginfo.msgmnb);
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printf("\tmsgtql: %6d\t(max # of messages in system)\n",msginfo.msgtql);
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printf("\tmsgssz: %6d\t(size of a message segment)\n",msginfo.msgssz);
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printf("\tmsgseg: %6d\t(# of message segments in system)\n",msginfo.msgseg);
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getsymbol(symbols,"_msqids",&msqids,sizeof(msqids));
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xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni);
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getlocation(msqids,xmsqids,sizeof(struct msqid_ds) * msginfo.msgmni);
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for ( i = 0; i < msginfo.msgmni; i += 1 ) {
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if ( xmsqids[i].msg_qbytes != 0 ) {
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char stime_buf[100], rtime_buf[100], ctime_buf[100];
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struct msqid_ds *msqptr = &xmsqids[i];
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cvt_time(msqptr->msg_stime,stime_buf);
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cvt_time(msqptr->msg_rtime,rtime_buf);
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cvt_time(msqptr->msg_ctime,ctime_buf);
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printf("\nmsgq id: %d key: 0x%08x\n",
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IXSEQ_TO_IPCID(i,msqptr->msg_perm),
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msqptr->msg_perm.key);
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printf(" cuid: %6d cgid: %6d ctime: %s\n",
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msqptr->msg_perm.cuid,msqptr->msg_perm.cgid,ctime_buf);
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printf(" uid: %6d gid: %6d\n",
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msqptr->msg_perm.uid,msqptr->msg_perm.gid);
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printf(" lspid: %6d stime: %s\n",
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msqptr->msg_lspid,stime_buf);
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printf(" lrpid: %6d qnum: %6d rtime: %s\n",
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msqptr->msg_lrpid,msqptr->msg_qnum,rtime_buf);
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printf(" cbytes:%6d qbytes:%6d perm: %s\n",
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msqptr->msg_cbytes,msqptr->msg_qbytes,fmt_perm(msqptr->msg_perm.mode));
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}
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}
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} else {
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fprintf(stderr,"SVID messages facility not configured in the system\n");
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}
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exit(0);
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}
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