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