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- /* ipcs.c - provide information on ipc facilities
- *
- * Copyright 2014 Sandeep Sharma <sandeep.jack2756@gmail.com>
- *
- * see http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ipcs.html
- USE_IPCS(NEWTOY(ipcs, "acptulsqmi#", TOYFLAG_USR|TOYFLAG_BIN))
- config IPCS
- bool "ipcs"
- default n
- help
- usage: ipcs [[-smq] -i shmid] | [[-asmq] [-tcplu]]
- -i Show specific resource
- Resource specification:
- -a All (default)
- -m Shared memory segments
- -q Message queues
- -s Semaphore arrays
- Output format:
- -c Creator
- -l Limits
- -p Pid
- -t Time
- -u Summary
- */
- #define FOR_ipcs
- #include "toys.h"
- #include <sys/ipc.h>
- #include <sys/shm.h>
- #include <sys/sem.h>
- #include <sys/msg.h>
- GLOBALS(
- int id;
- )
- //used many times, so good to paste it
- #define flag(x) (toys.optflags & FLAG_ ## x)
- union semun { //man says declare it yourself
- int val;
- struct semid_ds *buf;
- unsigned short *array;
- struct seminfo *__buf;
- };
- static void show_msg_id(void)
- {
- struct msqid_ds buf;
- int ret;
- if ((ret = msgctl(TT.id, IPC_STAT, &buf)) < 0) {
- perror_msg("msgctl");
- return;
- }
- #define ipcperm buf.msg_perm
- printf("\nMessage Queue msqid=%d\n"
- "uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n",
- TT.id, ipcperm.uid, ipcperm.gid, ipcperm.cuid, ipcperm.cgid,ipcperm.mode);
- printf ("cbytes=%ld\tqbytes=%ld\tqnum=%ld\tlspid=%d\tlrpid=%d\n",
- (long) buf.msg_cbytes, (long) buf.msg_qbytes,
- (long) buf.msg_qnum, buf.msg_lspid, buf.msg_lrpid);
- printf("send_time=%-26.24s\nrcv_time=%-26.24s\nchange_time=%-26.24s\n\n",
- buf.msg_stime ? ctime(&buf.msg_stime) : "Not set",
- buf.msg_rtime ? ctime(&buf.msg_rtime) : "Not set",
- buf.msg_ctime ? ctime(&buf.msg_ctime) : "Not set");
- #undef ipcperm
- }
- static void show_sem_id(void)
- {
- struct semid_ds buf;
- union semun n;
- int ret, i;
- n.buf = &buf;
- if ((ret = semctl(TT.id, 0, IPC_STAT, n)) < 0) {
- perror_msg("semctl");
- return;
- }
- #define ipcperm buf.sem_perm
- printf("\nSemaphore Array semid=%d\n"
- "uid=%d\t gid=%d\t cuid=%d\t cgid=%d\n"
- "mode=%#o, access_perms=%#o\n"
- "nsems = %ld\n"
- "otime = %-26.24s\n",
- TT.id,
- ipcperm.uid, ipcperm.gid, ipcperm.cuid, ipcperm.cgid,
- ipcperm.mode, ipcperm.mode & 0777,
- (long) buf.sem_nsems,
- buf.sem_otime ? ctime(&buf.sem_otime) : "Not set");
- printf("ctime = %-26.24s\n"
- "%-10s %-10s %-10s %-10s %-10s\n",
- ctime(&buf.sem_ctime),
- "semnum", "value", "ncount", "zcount", "pid");
- #undef ipcperm
- for (i = 0; i < buf.sem_nsems; i++) {
- int val, nc, zc, pid;
- val = semctl(TT.id, i, GETVAL, n);
- nc = semctl(TT.id, i, GETNCNT, n);
- zc = semctl(TT.id, i, GETZCNT, n);
- pid = semctl(TT.id, i, GETPID, n);
- if (val < 0 || nc < 0 || zc < 0 || pid < 0)
- perror_exit("semctl");
- printf("%-10d %-10d %-10d %-10d %-10d\n", i, val, nc, zc, pid);
- }
- xputc('\n');
- }
- static void show_shm_id(void)
- {
- struct shmid_ds buf;
- int ret;
- if ((ret = shmctl(TT.id, IPC_STAT, &buf)) < 0) {
- perror_msg("shmctl");
- return;
- }
- #define ipcperm buf.shm_perm
- printf("\nShared memory Segment shmid=%d\n"
- "uid=%d\tgid=%d\tcuid=%d\tcgid=%d\n"
- "mode=%#o\taccess_perms=%#o\n"
- "bytes=%ld\tlpid=%d\tcpid=%d\tnattch=%ld\n",
- TT.id,
- ipcperm.uid, ipcperm.gid, ipcperm.cuid, ipcperm.cgid,
- ipcperm.mode, (ipcperm.mode & 0777),
- (long) buf.shm_segsz, buf.shm_lpid, buf.shm_cpid,
- (long) buf.shm_nattch);
- printf("att_time=%-26.24s\n",
- buf.shm_atime ? ctime(&buf.shm_atime) : "Not set");
- printf("det_time=%-26.24s\n",
- buf.shm_dtime ? ctime(&buf.shm_dtime) : "Not set");
- printf("change_time=%-26.24s\n\n", ctime(&buf.shm_ctime));
- #undef ipcperm
- }
- static void shm_array(void)
- {
- struct shm_info shm_buf;
- struct shminfo ipc_buf;
- struct shmid_ds buf;
- int max_nr, i, shmid;
- struct passwd *pw;
- struct group *gr;
- if ((max_nr = shmctl(0, SHM_INFO, (struct shmid_ds*)&shm_buf)) < 0) {
- perror_msg("kernel not configured for shared memory");
- return;
- }
- if (flag(u)) {
- printf("------ Shared Memory Status --------\n");
- printf("segments allocated %d\n"
- "pages allocated %ld\n"
- "pages resident %ld\n"
- "pages swapped %ld\n"
- "Swap performance: %ld attempts\t%ld successes\n",
- shm_buf.used_ids,
- shm_buf.shm_tot,
- shm_buf.shm_rss,
- shm_buf.shm_swp,
- shm_buf.swap_attempts, shm_buf.swap_successes);
- return;
- }
- if (flag(l)) {
- if ((shmctl(0, 3, (struct shmid_ds*)&ipc_buf)) < 0) return; //IPC_INFO
- printf("------ Shared Memory Limits --------\n");
- printf("max number of segments = %lu\n"
- "max seg size (kbytes) = %lu\n"
- "max total shared memory (pages) = %lu\n"
- "min seg size (bytes) = %lu\n",
- (unsigned long) ipc_buf.shmmni,
- (unsigned long) (ipc_buf.shmmax >> 10),
- (unsigned long) ipc_buf.shmall,
- (unsigned long) ipc_buf.shmmin);
- return;
- }
- if (flag(t)) {
- printf("------ Shared Memory Attach/Detach/Change Times --------\n");
- printf("%-10s %-10s %-20s %-20s %-20s\n",
- "shmid", "owner", "attached", "detached", "changed");
- } else if (flag(p)) {
- printf("------ Shared Memory Creator/Last-op --------\n");
- printf("%-10s %-10s %-10s %-10s\n",
- "shmid", "owner", "cpid", "lpid");
- } else if (flag(c)) {
- printf("------ Shared Memory Segment Creators/Owners --------\n");
- printf("%-10s %-10s %-10s %-10s %-10s %-10s\n",
- "shmid", "perms", "cuid", "cgid", "uid", "gid");
- } else {
- printf("------ Shared Memory Segments --------\n");
- printf("%-10s %-10s %-10s %-10s %-10s %-10s %-12s\n",
- "key", "shmid", "owner", "perms", "bytes", "nattch",
- "status");
- }
- for (i = 0; i <= max_nr; i++) {
- if ((shmid = shmctl(i, SHM_STAT, &buf)) < 0 ) continue;
- if (flag(t)) {
- if ((pw = getpwuid(buf.shm_perm.uid)))
- printf("%-10d %-10.10s", shmid, pw->pw_name);
- else printf("%-10d %-10.10d", shmid, buf.shm_perm.uid);
- printf(" %-20.16s", buf.shm_atime
- ? ctime(&buf.shm_atime) + 4 : "Not set");
- printf(" %-20.16s", buf.shm_dtime
- ? ctime(&buf.shm_dtime) + 4 : "Not set");
- printf(" %-20.16s\n", buf.shm_ctime
- ? ctime(&buf.shm_ctime) + 4 : "Not set");
- } else if (flag(p)) {
- if ((pw = getpwuid(buf.shm_perm.uid)))
- printf("%-10d %-10.10s", shmid, pw->pw_name);
- else printf("%-10d %-10.10d", shmid, buf.shm_perm.uid);
- printf(" %-10d %-10d\n", buf.shm_cpid, buf.shm_lpid);
- } else if (flag(c)) {
- printf("%-10d %-10o", shmid, buf.shm_perm.mode & 0777);
- if ((pw = getpwuid(buf.shm_perm.cuid))) printf(" %-10s", pw->pw_name);
- else printf(" %-10d", buf.shm_perm.cuid);
- if ((gr = getgrgid(buf.shm_perm.cgid))) printf(" %-10s", gr->gr_name);
- else printf(" %-10d", buf.shm_perm.cgid);
- if ((pw = getpwuid(buf.shm_perm.uid))) printf(" %-10s", pw->pw_name);
- else printf(" %-10d", buf.shm_perm.uid);
- if ((gr = getgrgid(buf.shm_perm.gid))) printf(" %-10s\n", gr->gr_name);
- else printf(" %-10d\n", buf.shm_perm.gid);
- } else {
- printf("0x%08x ", buf.shm_perm.__key);
- if ((pw = getpwuid(buf.shm_perm.uid)))
- printf("%-10d %-10.10s", shmid, pw->pw_name);
- else printf("%-10d %-10.10d", shmid, buf.shm_perm.uid);
- printf(" %-10o %-10lu %-10ld %-6s %-6s\n", buf.shm_perm.mode & 0777,
- (unsigned long) buf.shm_segsz,
- (long) buf.shm_nattch,
- buf.shm_perm.mode & SHM_DEST ? "dest" : " ",
- buf.shm_perm.mode & SHM_LOCKED ? "locked" : " ");
- }
- }
- }
- static void sem_array(void)
- {
- struct seminfo info_buf;
- struct semid_ds buf;
- union semun u;
- int max_nr, i,semid;
- struct passwd *pw;
- struct group *gr;
- u.array = (unsigned short *)&info_buf;
- if ((max_nr = semctl(0, 0, SEM_INFO, u)) < 0) {
- perror_msg("kernel is not configured for semaphores");
- return;
- }
- if (flag(u)) {
- printf("------ Semaphore Status --------\n");
- printf("used arrays = %d\n"
- "allocated semaphores = %d\n",
- info_buf.semusz, info_buf.semaem);
- return;
- }
- if (flag(l)) {
- printf("------ Semaphore Limits --------\n");
- u.array = (unsigned short *)&info_buf;
- if ((semctl(0, 0, 3, u)) < 0) //IPC_INFO
- return;
- printf("max number of arrays = %d\n"
- "max semaphores per array = %d\n"
- "max semaphores system wide = %d\n"
- "max ops per semop call = %d\n"
- "semaphore max value = %d\n",
- info_buf.semmni,
- info_buf.semmsl,
- info_buf.semmns, info_buf.semopm, info_buf.semvmx);
- return;
- }
- if (flag(t)) {
- printf("------ Semaphore Operation/Change Times --------\n");
- printf("%-8s %-10s %-26.24s %-26.24s\n",
- "shmid", "owner", "last-op", "last-changed");
- } else if (flag(c)) {
- printf("------ Semaphore %s --------\n", "Arrays Creators/Owners");
- printf("%-10s %-10s %-10s %-10s %-10s %-10s\n",
- "semid", "perms", "cuid", "cgid", "uid", "gid");
- } else if (flag(p)){
- return;
- } else {
- printf("------ Semaphore %s --------\n", "Arrays");
- printf("%-10s %-10s %-10s %-10s %-10s\n",
- "key", "semid", "owner", "perms", "nsems");
- }
- for (i = 0; i <= max_nr; i++) {
- u.buf = &buf;
- if ((semid = semctl(i, 0, SEM_STAT, u)) < 0) continue;
- pw = getpwuid(buf.sem_perm.uid);
- if (flag(t)) {
- if (pw) printf("%-8d %-10.10s", semid, pw->pw_name);
- else printf("%-8d %-10d", semid, buf.sem_perm.uid);
- printf(" %-26.24s", buf.sem_otime
- ? ctime(&buf.sem_otime) : "Not set");
- printf(" %-26.24s\n", buf.sem_ctime
- ? ctime(&buf.sem_ctime) : "Not set");
- } else if (flag(c)) {
- printf("%-10d %-10o", semid, buf.sem_perm.mode & 0777);
- if ((pw = getpwuid(buf.sem_perm.cuid))) printf(" %-10s", pw->pw_name);
- else printf(" %-10d", buf.sem_perm.cuid);
- if ((gr = getgrgid(buf.sem_perm.cgid))) printf(" %-10s", gr->gr_name);
- else printf(" %-10d", buf.sem_perm.cgid);
- if ((pw = getpwuid(buf.sem_perm.uid))) printf(" %-10s", pw->pw_name);
- else printf(" %-10d", buf.sem_perm.uid);
- if ((gr = getgrgid(buf.sem_perm.gid))) printf(" %-10s\n", gr->gr_name);
- else printf(" %-10d\n", buf.sem_perm.gid);
- } else {
- printf("0x%08x ", buf.sem_perm.__key);
- if (pw) printf("%-10d %-10.9s", semid, pw->pw_name);
- else printf("%-10d %-9d", semid, buf.sem_perm.uid);
- printf(" %-10o %-10ld\n", buf.sem_perm.mode & 0777,
- (long) buf.sem_nsems);
- }
- }
- }
- static void msg_array(void)
- {
- struct msginfo info_buf;
- struct msqid_ds buf;
- int max_nr, i, msqid;
- struct passwd *pw;
- struct group *gr;
- if ((max_nr = msgctl(0, MSG_INFO, (struct msqid_ds*)&info_buf)) < 0) {
- perror_msg("kernel not configured for message queue");
- return;
- }
- if (flag(u)) {
- printf("------ Message%s --------\n", "s: Status");
- printf("allocated queues = %d\n"
- "used headers = %d\n"
- "used space = %d bytes\n",
- info_buf.msgpool, info_buf.msgmap, info_buf.msgtql);
- return;
- }
- if (flag(l)) {
- if ((msgctl(0, 3, (struct msqid_ds*)&info_buf)) < 0) return; //IPC_INFO
- printf("------ Messages: Limits --------\n");
- printf("max queues system wide = %d\n"
- "max size of message (bytes) = %d\n"
- "default max size of queue (bytes) = %d\n",
- info_buf.msgmni, info_buf.msgmax, info_buf.msgmnb);
- return;
- }
- if (flag(t)) {
- printf("------ Message%s --------\n", " Queues Send/Recv/Change Times");
- printf("%-8s %-10s %-20s %-20s %-20s\n",
- "msqid", "owner", "send", "recv", "change");
- } else if (flag(p)) {
- printf("------ Message%s --------\n", " Queues PIDs");
- printf("%-10s %-10s %-10s %-10s\n",
- "msqid", "owner", "lspid", "lrpid");
- } else if (flag(c)) {
- printf("------ Message%s --------\n", " Queues: Creators/Owners");
- printf("%-10s %-10s %-10s %-10s %-10s %-10s\n",
- "msqid", "perms", "cuid", "cgid", "uid", "gid");
- } else {
- printf("------ Message%s --------\n", " Queues");
- printf("%-10s %-10s %-10s %-10s %-12s %-12s\n",
- "key", "msqid", "owner", "perms", "used-bytes", "messages");
- }
- for (i = 0; i <= max_nr; i++) {
- if ((msqid = msgctl(i, MSG_STAT, &buf)) < 0 ) continue;
- pw = getpwuid(buf.msg_perm.uid);
- if (flag(t)) {
- if (pw) printf("%-8d %-10.10s", msqid, pw->pw_name);
- else printf("%-8d %-10d", msqid, buf.msg_perm.uid);
- printf(" %-20.16s", buf.msg_stime
- ? ctime(&buf.msg_stime) + 4 : "Not set");
- printf(" %-20.16s", buf.msg_rtime
- ? ctime(&buf.msg_rtime) + 4 : "Not set");
- printf(" %-20.16s\n", buf.msg_ctime
- ? ctime(&buf.msg_ctime) + 4 : "Not set");
- } else if (flag(p)) {
- if (pw) printf("%-8d %-10.10s", msqid, pw->pw_name);
- else printf("%-8d %-10d", msqid, buf.msg_perm.uid);
- printf(" %5d %5d\n", buf.msg_lspid, buf.msg_lrpid);
- } else if (flag(c)) {
- printf("%-10d %-10o", msqid, buf.msg_perm.mode & 0777);
- if ((pw = getpwuid(buf.msg_perm.cuid))) printf(" %-10s", pw->pw_name);
- else printf(" %-10d", buf.msg_perm.cuid);
- if ((gr = getgrgid(buf.msg_perm.cgid))) printf(" %-10s", gr->gr_name);
- else printf(" %-10d", buf.msg_perm.cgid);
- if ((pw = getpwuid(buf.msg_perm.uid))) printf(" %-10s", pw->pw_name);
- else printf(" %-10d", buf.msg_perm.uid);
- if ((gr = getgrgid(buf.msg_perm.gid))) printf(" %-10s\n", gr->gr_name);
- else printf(" %-10d\n", buf.msg_perm.gid);
- } else {
- printf("0x%08x ", buf.msg_perm.__key);
- if (pw) printf("%-10d %-10.10s", msqid, pw->pw_name);
- else printf("%-10d %-10d", msqid, buf.msg_perm.uid);
- printf(" %-10o %-12ld %-12ld\n", buf.msg_perm.mode & 0777,
- (long) buf.msg_cbytes, (long) buf.msg_qnum);
- }
- }
- }
- void ipcs_main(void)
- {
- if (flag(i)) {
- if (flag(m)) show_shm_id();
- else if (flag(s)) show_sem_id();
- else if (flag(q)) show_msg_id();
- else help_exit(0);
- return;
- }
- if (!(flag(m) || flag(s) || flag(q)) || flag(a)) toys.optflags |= (FLAG_m|FLAG_s|FLAG_q);
- xputc('\n');
- if (flag(m)) {
- shm_array();
- xputc('\n');
- }
- if (flag(s)) {
- sem_array();
- xputc('\n');
- }
- if (flag(q)) {
- msg_array();
- xputc('\n');
- }
- }
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