/* * Copyright (c) 1994 SigmaSoft, Th. Lockert * 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 #ifndef __FBSDID #define __FBSDID(s) const char version[] = (s) #endif __FBSDID("$FreeBSD: /repoman/r/ncvs/src/usr.bin/ipcs/ipcs.c,v 1.22 2003/10/30 16:52:14 iwasaki Exp $"); #include #include #include #include #ifndef __CYGWIN__ #include #include #endif /* __CYGWIN__ */ #include #include #include #ifdef __CYGWIN__ #include #endif /* __CYGWIN__ */ #include #include #include #include #include #include #include #include #ifndef __CYGWIN__ #include #include #endif /* __CYGWIN__ */ #define _KERNEL #include #include #include #include /* SysCtlGatherStruct structure. */ struct scgs_vector { const char *sysctl; off_t offset; size_t size; }; int use_sysctl = 1; struct semid_ds *sema; struct seminfo seminfo; struct msginfo msginfo; struct msqid_ds *msqids; struct shminfo shminfo; struct shmid_ds *shmsegs; char *fmt_perm(u_short); void cvt_time(time_t, char *); void sysctlgatherstruct(void *addr, size_t size, struct scgs_vector *vec); void kget(int idx, void *addr, size_t size); void usage(void); #ifdef __CYGWIN__ void help() __attribute__ ((noreturn)); #endif /* __CYGWIN__ */ #ifdef __CYGWIN__ #define _POSIX2_LINE_MAX 255 typedef int kvm_t; #define kvm_openfiles(a,b,c,d,e) NULL #define kvm_nlist(a,b) -1 #define kvm_close(a) #define kvm_read(a,b,c,d) 0 #define kvm_geterr(a) "" #define sysctlbyname(a,b,c,d,e) -1 struct nlist { const char *n_name; int n_type; int n_value; }; #endif /* __CYGWIN__ */ static struct nlist symbols[] = { {"sema"}, #define X_SEMA 0 {"seminfo"}, #define X_SEMINFO 1 {"msginfo"}, #define X_MSGINFO 2 {"msqids"}, #define X_MSQIDS 3 {"shminfo"}, #define X_SHMINFO 4 {"shmsegs"}, #define X_SHMSEGS 5 #ifdef __CYGWIN__ {"msgstat"}, #define X_MSGSTAT 6 {"semstat"}, #define X_SEMSTAT 7 {"shmstat"}, #define X_SHMSTAT 8 #endif /* __CYGWIN__ */ {NULL} }; #define SHMINFO_XVEC \ X(shmmax, sizeof(int)) \ X(shmmin, sizeof(int)) \ X(shmmni, sizeof(int)) \ X(shmseg, sizeof(int)) \ X(shmall, sizeof(int)) #define SEMINFO_XVEC \ X(semmap, sizeof(int)) \ X(semmni, sizeof(int)) \ X(semmns, sizeof(int)) \ X(semmnu, sizeof(int)) \ X(semmsl, sizeof(int)) \ X(semopm, sizeof(int)) \ X(semume, sizeof(int)) \ X(semusz, sizeof(int)) \ X(semvmx, sizeof(int)) \ X(semaem, sizeof(int)) #define MSGINFO_XVEC \ X(msgmax, sizeof(int)) \ X(msgmni, sizeof(int)) \ X(msgmnb, sizeof(int)) \ X(msgtql, sizeof(int)) \ X(msgssz, sizeof(int)) \ X(msgseg, sizeof(int)) #define X(a, b) { "kern.ipc." #a, offsetof(TYPEC, a), (b) }, #define TYPEC struct shminfo struct scgs_vector shminfo_scgsv[] = { SHMINFO_XVEC { NULL } }; #undef TYPEC #define TYPEC struct seminfo struct scgs_vector seminfo_scgsv[] = { SEMINFO_XVEC { NULL } }; #undef TYPEC #define TYPEC struct msginfo struct scgs_vector msginfo_scgsv[] = { MSGINFO_XVEC { NULL } }; #undef TYPEC #undef X static kvm_t *kd; #ifdef __CYGWIN__ const char * user_from_uid (uid_t uid, uid_t dummy) { struct passwd *pwd = getpwuid (uid); return pwd ? pwd->pw_name : "???"; } const char * group_from_gid (gid_t gid, gid_t dummy) { struct group *grp = getgrgid (gid); return grp ? grp->gr_name : "???"; } #endif /* __CYGWIN__ */ char * fmt_perm(mode) 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(t, buf) 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 SHMINFO 1 #define SHMTOTAL 2 #define MSGINFO 4 #define MSGTOTAL 8 #define SEMINFO 16 #define SEMTOTAL 32 #define BIGGEST 1 #define CREATOR 2 #define OUTSTANDING 4 #define PID 8 #define TIME 16 #ifdef __CYGWIN__ #define STATUS 32 #endif /* __CYGWIN__ */ int main(argc, argv) int argc; char *argv[]; { int display = SHMINFO | MSGINFO | SEMINFO; int option = 0; char *core = NULL, *namelist = NULL; char kvmoferr[_POSIX2_LINE_MAX]; /* Error buf for kvm_openfiles. */ int i; #ifdef __CYGWIN__ while ((i = getopt(argc, argv, "MmQqSsabchoptTu")) != -1) #else while ((i = getopt(argc, argv, "MmQqSsabC:cN:optTy")) != -1) #endif /* __CYGWIN__ */ switch (i) { case 'M': display = SHMTOTAL; break; case 'm': display = SHMINFO; 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 'a': option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME; break; case 'b': option |= BIGGEST; break; #ifndef __CYGWIN__ case 'C': core = optarg; break; #endif /* __CYGWIN__ */ case 'c': option |= CREATOR; break; #ifndef __CYGWIN__ case 'N': namelist = optarg; break; #endif /* __CYGWIN__ */ case 'o': option |= OUTSTANDING; break; case 'p': option |= PID; break; case 't': option |= TIME; break; #ifdef __CYGWIN__ case 'h': help(); case 'u': option |= STATUS; break; #endif /* __CYGWIN__ */ #ifndef __CYGWIN__ case 'y': use_sysctl = 0; break; #endif /* __CYGWIN__ */ 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: #ifdef notdef /* they'll be told more civilly later */ warnx("nlist failed"); for (i = 0; symbols[i].n_name != NULL; i++) if (symbols[i].n_value == 0) warnx("symbol %s not found", symbols[i].n_name); #endif break; } } kget(X_MSGINFO, &msginfo, sizeof(msginfo)); if ((display & (MSGINFO | MSGTOTAL))) { if (display & MSGTOTAL) { printf("msginfo:\n"); printf("\tmsgmax: %8ld\t(max characters in a message)\n", msginfo.msgmax); printf("\tmsgmni: %8ld\t(# of message queues)\n", msginfo.msgmni); printf("\tmsgmnb: %8ld\t(max characters in a message queue)\n", msginfo.msgmnb); printf("\tmsgtql: %8ld\t(max # of messages in system)\n", msginfo.msgtql); printf("\tmsgssz: %8ld\t(size of a message segment)\n", msginfo.msgssz); printf("\tmsgseg: %8ld\t(# of message segments in system)\n\n", msginfo.msgseg); } if (display & MSGINFO) { struct msqid_ds *xmsqids; size_t xmsqids_len; xmsqids_len = sizeof(struct msqid_ds) * msginfo.msgmni; xmsqids = malloc(xmsqids_len); kget(X_MSQIDS, xmsqids, xmsqids_len); printf("Message Queues:\n"); printf("T ID KEY MODE OWNER GROUP"); if (option & CREATOR) printf(" CREATOR CGROUP"); if (option & OUTSTANDING) printf(" CBYTES QNUM"); if (option & BIGGEST) printf(" QBYTES"); if (option & PID) printf(" LSPID LRPID"); if (option & TIME) printf(" STIME RTIME CTIME"); printf("\n"); for (i = 0; i < msginfo.msgmni; i += 1) { if (xmsqids[i].msg_qbytes != 0) { char stime_buf[100], rtime_buf[100], ctime_buf[100]; struct msqid_ds *msqptr = &xmsqids[i]; cvt_time(msqptr->msg_stime, stime_buf); cvt_time(msqptr->msg_rtime, rtime_buf); cvt_time(msqptr->msg_ctime, ctime_buf); printf("q %6d %20llu %s %8s %8s", IXSEQ_TO_IPCID(i, msqptr->msg_perm), msqptr->msg_perm.key, fmt_perm(msqptr->msg_perm.mode), user_from_uid(msqptr->msg_perm.uid, 0), group_from_gid(msqptr->msg_perm.gid, 0)); if (option & CREATOR) printf(" %8s %8s", user_from_uid(msqptr->msg_perm.cuid, 0), group_from_gid(msqptr->msg_perm.cgid, 0)); if (option & OUTSTANDING) printf(" %6lu %6lu", msqptr->msg_cbytes, msqptr->msg_qnum); if (option & BIGGEST) printf(" %6lu", msqptr->msg_qbytes); if (option & PID) printf(" %6d %6d", msqptr->msg_lspid, msqptr->msg_lrpid); if (option & TIME) printf(" %s %s %s", stime_buf, rtime_buf, ctime_buf); printf("\n"); } } printf("\n"); } #ifdef __CYGWIN__ if (option & STATUS) { struct msg_info msg_info; kget(X_MSGSTAT, &msg_info, sizeof msg_info); printf("Message Queue Usage:\n"); printf("\tmsg_ids: %7ld\t(no. of allocated queues)\n", msg_info.msg_ids); printf("\tmsg_num: %7ld\t(no. of messages in system)\n", msg_info.msg_num); printf("\tmsg_tot: %7ld\t(size in bytes of messages in system)\n", msg_info.msg_tot); printf("\n"); } #endif /* __CYGWIN__ */ } else if (display & (MSGINFO | MSGTOTAL)) { fprintf(stderr, "SVID messages facility not configured in the system\n"); } kget(X_SHMINFO, &shminfo, sizeof(shminfo)); if ((display & (SHMINFO | SHMTOTAL))) { if (display & SHMTOTAL) { printf("shminfo:\n"); printf("\tshmmax: %8ld\t(max shared memory segment size)\n", shminfo.shmmax); printf("\tshmmin: %8ld\t(min shared memory segment size)\n", shminfo.shmmin); printf("\tshmmni: %8ld\t(max number of shared memory identifiers)\n", shminfo.shmmni); printf("\tshmseg: %8ld\t(max shared memory segments per process)\n", shminfo.shmseg); printf("\tshmall: %8ld\t(max amount of shared memory in pages)\n\n", shminfo.shmall); } if (display & SHMINFO) { struct shmid_ds *xshmids; size_t xshmids_len; xshmids_len = sizeof(struct shmid_ds) * shminfo.shmmni; xshmids = malloc(xshmids_len); kget(X_SHMSEGS, xshmids, xshmids_len); printf("Shared Memory:\n"); printf("T ID KEY MODE OWNER GROUP"); if (option & CREATOR) printf(" CREATOR CGROUP"); if (option & OUTSTANDING) printf(" NATTCH"); if (option & BIGGEST) printf(" SEGSZ"); if (option & PID) printf(" CPID LPID"); if (option & TIME) printf(" ATIME DTIME CTIME"); printf("\n"); for (i = 0; i < shminfo.shmmni; i += 1) { if (xshmids[i].shm_perm.mode & 0x0800) { char atime_buf[100], dtime_buf[100], ctime_buf[100]; struct shmid_ds *shmptr = &xshmids[i]; cvt_time(shmptr->shm_atime, atime_buf); cvt_time(shmptr->shm_dtime, dtime_buf); cvt_time(shmptr->shm_ctime, ctime_buf); printf("m %6d %20llu %s %8s %8s", IXSEQ_TO_IPCID(i, shmptr->shm_perm), shmptr->shm_perm.key, fmt_perm(shmptr->shm_perm.mode), user_from_uid(shmptr->shm_perm.uid, 0), group_from_gid(shmptr->shm_perm.gid, 0)); if (option & CREATOR) printf(" %8s %8s", user_from_uid(shmptr->shm_perm.cuid, 0), group_from_gid(shmptr->shm_perm.cgid, 0)); if (option & OUTSTANDING) printf(" %6d", shmptr->shm_nattch); if (option & BIGGEST) printf(" %6d", shmptr->shm_segsz); if (option & PID) printf(" %6d %6d", shmptr->shm_cpid, shmptr->shm_lpid); if (option & TIME) printf(" %s %s %s", atime_buf, dtime_buf, ctime_buf); printf("\n"); } } printf("\n"); } #ifdef __CYGWIN__ if (option & STATUS) { struct shm_info shm_info; kget(X_SHMSTAT, &shm_info, sizeof shm_info); printf("Shared Memory Usage:\n"); printf("\tshm_ids: %7ld\t(no. of allocated segments)\n", shm_info.shm_ids); printf("\tshm_tot: %7ld\t(size in bytes of allocated segments)\n", shm_info.shm_tot); printf("\tshm_atts: %7ld\t(no. of attached segments in system)\n", shm_info.shm_atts); printf("\n"); } #endif /* __CYGWIN__ */ } else if (display & (SHMINFO | SHMTOTAL)) { fprintf(stderr, "SVID shared memory facility not configured in the system\n"); } kget(X_SEMINFO, &seminfo, sizeof(seminfo)); if ((display & (SEMINFO | SEMTOTAL))) { struct semid_ds *xsema; size_t xsema_len; if (display & SEMTOTAL) { printf("seminfo:\n"); printf("\tsemmap: %8ld\t(# of entries in semaphore map)\n", seminfo.semmap); printf("\tsemmni: %8ld\t(# of semaphore identifiers)\n", seminfo.semmni); printf("\tsemmns: %8ld\t(# of semaphores in system)\n", seminfo.semmns); printf("\tsemmnu: %8ld\t(# of undo structures in system)\n", seminfo.semmnu); printf("\tsemmsl: %8ld\t(max # of semaphores per id)\n", seminfo.semmsl); printf("\tsemopm: %8ld\t(max # of operations per semop call)\n", seminfo.semopm); printf("\tsemume: %8ld\t(max # of undo entries per process)\n", seminfo.semume); printf("\tsemusz: %8ld\t(size in bytes of undo structure)\n", seminfo.semusz); printf("\tsemvmx: %8ld\t(semaphore maximum value)\n", seminfo.semvmx); printf("\tsemaem: %8ld\t(adjust on exit max value)\n\n", seminfo.semaem); } if (display & SEMINFO) { xsema_len = sizeof(struct semid_ds) * seminfo.semmni; xsema = malloc(xsema_len); kget(X_SEMA, xsema, xsema_len); printf("Semaphores:\n"); printf("T ID KEY MODE OWNER GROUP"); if (option & CREATOR) printf(" CREATOR CGROUP"); if (option & BIGGEST) printf(" NSEMS"); if (option & TIME) printf(" OTIME CTIME"); printf("\n"); for (i = 0; i < seminfo.semmni; i += 1) { if ((xsema[i].sem_perm.mode & SEM_ALLOC) != 0) { char ctime_buf[100], otime_buf[100]; struct semid_ds *semaptr = &xsema[i]; cvt_time(semaptr->sem_otime, otime_buf); cvt_time(semaptr->sem_ctime, ctime_buf); printf("s %6d %20llu %s %8s %8s", IXSEQ_TO_IPCID(i, semaptr->sem_perm), semaptr->sem_perm.key, fmt_perm(semaptr->sem_perm.mode), user_from_uid(semaptr->sem_perm.uid, 0), group_from_gid(semaptr->sem_perm.gid, 0)); if (option & CREATOR) printf(" %8s %8s", user_from_uid(semaptr->sem_perm.cuid, 0), group_from_gid(semaptr->sem_perm.cgid, 0)); if (option & BIGGEST) printf(" %6d", semaptr->sem_nsems); if (option & TIME) printf(" %s %s", otime_buf, ctime_buf); printf("\n"); } } printf("\n"); } #ifdef __CYGWIN__ if (option & STATUS) { struct sem_info sem_info; kget(X_SEMSTAT, &sem_info, sizeof sem_info); printf("Semaphore Usage:\n"); printf("\tsem_ids: %7ld\t(no. of allocated semaphore sets)\n", sem_info.sem_ids); printf("\tsem_num: %7ld\t(no. of allocated semaphores)\n", sem_info.sem_num); printf("\n"); } #endif /* __CYGWIN__ */ } else if (display & (SEMINFO | SEMTOTAL)) { fprintf(stderr, "SVID semaphores facility not configured in the system\n"); } if (!use_sysctl) kvm_close(kd); exit(0); } void sysctlgatherstruct(addr, size, vecarr) void *addr; size_t size; struct scgs_vector *vecarr; { struct scgs_vector *xp; size_t tsiz; int rv; for (xp = vecarr; xp->sysctl != NULL; xp++) { assert(xp->offset <= size); tsiz = xp->size; rv = sysctlbyname(xp->sysctl, (char *)addr + xp->offset, &tsiz, NULL, 0); if (rv == -1) errx(1, "sysctlbyname: %s", xp->sysctl); if (tsiz != xp->size) errx(1, "%s size mismatch (expected %d, got %d)", xp->sysctl, xp->size, tsiz); } } void kget(idx, addr, size) int idx; void *addr; size_t size; { const char *symn; /* symbol name */ size_t tsiz; int rv; unsigned long kaddr; const char *sym2sysctl[] = { /* symbol to sysctl name table */ "kern.ipc.sema", "kern.ipc.seminfo", "kern.ipc.msginfo", "kern.ipc.msqids", "kern.ipc.shminfo", "kern.ipc.shmsegs" }; #ifndef __CYGWIN__ assert((unsigned)idx <= sizeof(sym2sysctl) / sizeof(*sym2sysctl)); #endif /* __CYGWIN__ */ #ifdef __CYGWIN__ if (1) { union semun su; switch (idx) { case X_MSGINFO: if (msgctl(0, IPC_INFO, (struct msqid_ds *)addr) < 0) err(1, "msgctl"); break; case X_SEMINFO: su.buf = (struct semid_ds *)addr; if (semctl(0, 0, IPC_INFO, su) < 0) err(1, "semctl"); break; break; case X_SHMINFO: if (shmctl(0, IPC_INFO, (struct shmid_ds *)addr) < 0) err(1, "shmctl"); break; case X_MSQIDS: if (msgctl(size / sizeof(struct msqid_ds), IPC_INFO, (struct msqid_ds *)addr) < 0) err(1, "msgctl"); break; case X_SEMA: su.buf = (struct semid_ds *)addr; if (semctl(size / sizeof(struct semid_ds), 0, IPC_INFO, su) < 0) err(1, "semctl"); break; case X_SHMSEGS: if (shmctl(size / sizeof(struct shmid_ds), IPC_INFO, (struct shmid_ds *)addr) < 0) err(1, "shmctl"); break; case X_MSGSTAT: if (msgctl(0, MSG_INFO, (struct msqid_ds *)addr) < 0) err(1, "msgctl"); break; case X_SEMSTAT: su.buf = (struct semid_ds *)addr; if (semctl(0, 0, SEM_INFO, su) < 0) err(1, "semctl"); break; break; case X_SHMSTAT: if (shmctl(0, SHM_INFO, (struct shmid_ds *)addr) < 0) err(1, "shmctl"); break; } } else #endif /* __CYGWIN__ */ if (!use_sysctl) { symn = symbols[idx].n_name; if (*symn == '_') symn++; if (symbols[idx].n_type == 0 || symbols[idx].n_value == 0) errx(1, "symbol %s undefined", symn); /* * For some symbols, the value we retreieve is * actually a pointer; since we want the actual value, * we have to manually dereference it. */ switch (idx) { case X_MSQIDS: tsiz = sizeof(msqids); rv = kvm_read(kd, symbols[idx].n_value, &msqids, tsiz); kaddr = (u_long)msqids; break; case X_SHMSEGS: tsiz = sizeof(shmsegs); rv = kvm_read(kd, symbols[idx].n_value, &shmsegs, tsiz); kaddr = (u_long)shmsegs; break; case X_SEMA: tsiz = sizeof(sema); rv = kvm_read(kd, symbols[idx].n_value, &sema, tsiz); kaddr = (u_long)sema; break; default: rv = tsiz = 0; kaddr = symbols[idx].n_value; break; } if ((unsigned)rv != tsiz) errx(1, "%s: %s", symn, kvm_geterr(kd)); if ((unsigned)kvm_read(kd, kaddr, addr, size) != size) errx(1, "%s: %s", symn, kvm_geterr(kd)); } else { switch (idx) { case X_SHMINFO: sysctlgatherstruct(addr, size, shminfo_scgsv); break; case X_SEMINFO: sysctlgatherstruct(addr, size, seminfo_scgsv); break; case X_MSGINFO: sysctlgatherstruct(addr, size, msginfo_scgsv); break; default: tsiz = size; rv = sysctlbyname(sym2sysctl[idx], addr, &tsiz, NULL, 0); if (rv == -1) err(1, "sysctlbyname: %s", sym2sysctl[idx]); if (tsiz != size) errx(1, "%s size mismatch " "(expected %d, got %d)", sym2sysctl[idx], size, tsiz); break; } } } void usage() { fprintf(stderr, #ifdef __CYGWIN__ "usage: ipcs [-abchmopqstuMQST]\n" "Try `ipcs -h' for more information.\n"); #else "usage: ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist]\n"); #endif /* __CYGWIN__ */ exit(1); } #ifdef __CYGWIN__ void help() { puts( "usage: ipcs [-abchmopqstuMQST]\n" "ipcs prints information for IPC resources for which you have read access.\n" " -a Show the maximum amount of information possible when displaying\n" " active semaphores, message queues and shared memory segments\n" " (This is shorthand for specifying -bcopt).\n" " -b Show the maximum allowed sizes for active semaphores, message queues\n" " and shared memory segments. The maximum allowed size is the maximum\n" " number of bytes in a message on a message queue, the size of a shared\n" " memory segment, or the number of semaphores in a set of semaphores.\n" " -c Show the creator's name and group for active semaphores, message\n" " queues, and shared memory segments.\n" " -h This help.\n" " -m Display information about active shared memory segments.\n" " -o Show outstanding usage for active message queues and shared memory\n" " segments. The outstanding usage is the number of messages in a\n" " message queue, or the number of processes attached to a shared memory\n" " segment.\n" " -p Show the process ID information for active semaphores, message queues\n" " and shared memory segments. The process ID information is the last\n" " process to send a message to or receive a message from a message\n" " queue, the process that created a semaphore, or the last process to\n" " attach or detach a shared memory segment.\n" " -q Display information about active message queues.\n" " -s Display information about active semaphores.\n" " -t Show access times for active semaphores, message queues and shared\n" " -u Show system wide usage of IPC resources. This information is added\n" " as a list after the appropriate shared memory, messages queue or\n" " semaphore information output\n" " -M Display system information about shared memory.\n" " -Q Display system information about messages queues.\n" " -S Display system information about semaphores.\n" " -T Display system information about shared memory, message queues and\n" " semaphores.\n"); exit(0); } #endif /* __CYGWIN__ */