Путь: Toys/Pending, команды версии: Ver.4 Ver.9 ipcs Комментарии в файле ipcs.c :
Исходный текст в файле ipcs.c #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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