1/* ipcs.c - provide information on ipc facilities 2 * 3 * Copyright 2014 Sandeep Sharma <sandeep.jack2756@gmail.com> 4 * 5 * see http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ipcs.html 6 7USE_IPCS(NEWTOY(ipcs, "acptulsqmi#", TOYFLAG_USR|TOYFLAG_BIN)) 8 9config IPCS 10 bool "ipcs" 11 default n 12 help 13 usage: ipcs [[-smq] -i shmid] | [[-asmq] [-tcplu]] 14 15 -i Show specific resource 16 Resource specification: 17 -a All (default) 18 -m Shared memory segments 19 -q Message queues 20 -s Semaphore arrays 21 Output format: 22 -c Creator 23 -l Limits 24 -p Pid 25 -t Time 26 -u Summary 27*/ 28 29#define FOR_ipcs 30#include "toys.h" 31#include <sys/ipc.h> 32#include <sys/shm.h> 33#include <sys/sem.h> 34#include <sys/msg.h> 35 36GLOBALS( 37 int id; 38) 39 40//used many times, so good to paste it 41#define flag(x) (toys.optflags & FLAG_ ## x) 42 43union semun { //man says declare it yourself 44 int val; 45 struct semid_ds *buf; 46 unsigned short *array; 47 struct seminfo *__buf; 48}; 49 50static void show_msg_id(void) 51{ 52 struct msqid_ds buf; 53 int ret; 54 55 if ((ret = msgctl(TT.id, IPC_STAT, &buf)) < 0) { 56 perror_msg("msgctl"); 57 return; 58 } 59 60#define ipcperm buf.msg_perm 61 62 printf("\nMessage Queue msqid=%d\n" 63 "uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n", 64 TT.id, ipcperm.uid, ipcperm.gid, ipcperm.cuid, ipcperm.cgid,ipcperm.mode); 65 printf ("cbytes=%ld\tqbytes=%ld\tqnum=%ld\tlspid=%d\tlrpid=%d\n", 66 (long) buf.msg_cbytes, (long) buf.msg_qbytes, 67 (long) buf.msg_qnum, buf.msg_lspid, buf.msg_lrpid); 68 69 printf("send_time=%-26.24s\nrcv_time=%-26.24s\nchange_time=%-26.24s\n\n", 70 buf.msg_stime ? ctime(&buf.msg_stime) : "Not set", 71 buf.msg_rtime ? ctime(&buf.msg_rtime) : "Not set", 72 buf.msg_ctime ? ctime(&buf.msg_ctime) : "Not set"); 73#undef ipcperm 74} 75 76static void show_sem_id(void) 77{ 78 struct semid_ds buf; 79 union semun n; 80 int ret, i; 81 82 n.buf = &buf; 83 if ((ret = semctl(TT.id, 0, IPC_STAT, n)) < 0) { 84 perror_msg("semctl"); 85 return; 86 } 87 88#define ipcperm buf.sem_perm 89 printf("\nSemaphore Array semid=%d\n" 90 "uid=%d\t gid=%d\t cuid=%d\t cgid=%d\n" 91 "mode=%#o, access_perms=%#o\n" 92 "nsems = %ld\n" 93 "otime = %-26.24s\n", 94 TT.id, 95 ipcperm.uid, ipcperm.gid, ipcperm.cuid, ipcperm.cgid, 96 ipcperm.mode, ipcperm.mode & 0777, 97 (long) buf.sem_nsems, 98 buf.sem_otime ? ctime(&buf.sem_otime) : "Not set"); 99 printf("ctime = %-26.24s\n" 100 "%-10s %-10s %-10s %-10s %-10s\n", 101 ctime(&buf.sem_ctime), 102 "semnum", "value", "ncount", "zcount", "pid"); 103#undef ipcperm 104 105 for (i = 0; i < buf.sem_nsems; i++) { 106 int val, nc, zc, pid; 107 val = semctl(TT.id, i, GETVAL, n); 108 nc = semctl(TT.id, i, GETNCNT, n); 109 zc = semctl(TT.id, i, GETZCNT, n); 110 pid = semctl(TT.id, i, GETPID, n); 111 if (val < 0 || nc < 0 || zc < 0 || pid < 0) 112 perror_exit("semctl"); 113 printf("%-10d %-10d %-10d %-10d %-10d\n", i, val, nc, zc, pid); 114 } 115 xputc('\n'); 116} 117 118static void show_shm_id(void) 119{ 120 struct shmid_ds buf; 121 int ret; 122 123 if ((ret = shmctl(TT.id, IPC_STAT, &buf)) < 0) { 124 perror_msg("shmctl"); 125 return; 126 } 127 128#define ipcperm buf.shm_perm 129 130 printf("\nShared memory Segment shmid=%d\n" 131 "uid=%d\tgid=%d\tcuid=%d\tcgid=%d\n" 132 "mode=%#o\taccess_perms=%#o\n" 133 "bytes=%ld\tlpid=%d\tcpid=%d\tnattch=%ld\n", 134 TT.id, 135 ipcperm.uid, ipcperm.gid, ipcperm.cuid, ipcperm.cgid, 136 ipcperm.mode, (ipcperm.mode & 0777), 137 (long) buf.shm_segsz, buf.shm_lpid, buf.shm_cpid, 138 (long) buf.shm_nattch); 139 printf("att_time=%-26.24s\n", 140 buf.shm_atime ? ctime(&buf.shm_atime) : "Not set"); 141 printf("det_time=%-26.24s\n", 142 buf.shm_dtime ? ctime(&buf.shm_dtime) : "Not set"); 143 printf("change_time=%-26.24s\n\n", ctime(&buf.shm_ctime)); 144#undef ipcperm 145} 146 147static void shm_array(void) 148{ 149 struct shm_info shm_buf; 150 struct shminfo ipc_buf; 151 struct shmid_ds buf; 152 int max_nr, i, shmid; 153 struct passwd *pw; 154 struct group *gr; 155 156 if ((max_nr = shmctl(0, SHM_INFO, (struct shmid_ds*)&shm_buf)) < 0) { 157 perror_msg("kernel not configured for shared memory"); 158 return; 159 } 160 161 if (flag(u)) { 162 printf("------ Shared Memory Status --------\n"); 163 printf("segments allocated %d\n" 164 "pages allocated %ld\n" 165 "pages resident %ld\n" 166 "pages swapped %ld\n" 167 "Swap performance: %ld attempts\t%ld successes\n", 168 shm_buf.used_ids, 169 shm_buf.shm_tot, 170 shm_buf.shm_rss, 171 shm_buf.shm_swp, 172 shm_buf.swap_attempts, shm_buf.swap_successes); 173 return; 174 } 175 if (flag(l)) { 176 if ((shmctl(0, 3, (struct shmid_ds*)&ipc_buf)) < 0) return; //IPC_INFO 177 printf("------ Shared Memory Limits --------\n"); 178 printf("max number of segments = %lu\n" 179 "max seg size (kbytes) = %lu\n" 180 "max total shared memory (pages) = %lu\n" 181 "min seg size (bytes) = %lu\n", 182 (unsigned long) ipc_buf.shmmni, 183 (unsigned long) (ipc_buf.shmmax >> 10), 184 (unsigned long) ipc_buf.shmall, 185 (unsigned long) ipc_buf.shmmin); 186 return; 187 } 188 189 if (flag(t)) { 190 printf("------ Shared Memory Attach/Detach/Change Times --------\n"); 191 printf("%-10s %-10s %-20s %-20s %-20s\n", 192 "shmid", "owner", "attached", "detached", "changed"); 193 } else if (flag(p)) { 194 printf("------ Shared Memory Creator/Last-op --------\n"); 195 printf("%-10s %-10s %-10s %-10s\n", 196 "shmid", "owner", "cpid", "lpid"); 197 } else if (flag(c)) { 198 printf("------ Shared Memory Segment Creators/Owners --------\n"); 199 printf("%-10s %-10s %-10s %-10s %-10s %-10s\n", 200 "shmid", "perms", "cuid", "cgid", "uid", "gid"); 201 } else { 202 printf("------ Shared Memory Segments --------\n"); 203 printf("%-10s %-10s %-10s %-10s %-10s %-10s %-12s\n", 204 "key", "shmid", "owner", "perms", "bytes", "nattch", 205 "status"); 206 } 207 208 for (i = 0; i <= max_nr; i++) { 209 if ((shmid = shmctl(i, SHM_STAT, &buf)) < 0 ) continue; 210 if (flag(t)) { 211 if ((pw = getpwuid(buf.shm_perm.uid))) 212 printf("%-10d %-10.10s", shmid, pw->pw_name); 213 else printf("%-10d %-10.10d", shmid, buf.shm_perm.uid); 214 printf(" %-20.16s", buf.shm_atime 215 ? ctime(&buf.shm_atime) + 4 : "Not set"); 216 printf(" %-20.16s", buf.shm_dtime 217 ? ctime(&buf.shm_dtime) + 4 : "Not set"); 218 printf(" %-20.16s\n", buf.shm_ctime 219 ? ctime(&buf.shm_ctime) + 4 : "Not set"); 220 } else if (flag(p)) { 221 if ((pw = getpwuid(buf.shm_perm.uid))) 222 printf("%-10d %-10.10s", shmid, pw->pw_name); 223 else printf("%-10d %-10.10d", shmid, buf.shm_perm.uid); 224 printf(" %-10d %-10d\n", buf.shm_cpid, buf.shm_lpid); 225 } else if (flag(c)) { 226 printf("%-10d %-10o", shmid, buf.shm_perm.mode & 0777); 227 if ((pw = getpwuid(buf.shm_perm.cuid))) printf(" %-10s", pw->pw_name); 228 else printf(" %-10d", buf.shm_perm.cuid); 229 if ((gr = getgrgid(buf.shm_perm.cgid))) printf(" %-10s", gr->gr_name); 230 else printf(" %-10d", buf.shm_perm.cgid); 231 if ((pw = getpwuid(buf.shm_perm.uid))) printf(" %-10s", pw->pw_name); 232 else printf(" %-10d", buf.shm_perm.uid); 233 if ((gr = getgrgid(buf.shm_perm.gid))) printf(" %-10s\n", gr->gr_name); 234 else printf(" %-10d\n", buf.shm_perm.gid); 235 } else { 236 printf("0x%08x ", buf.shm_perm.__key); 237 if ((pw = getpwuid(buf.shm_perm.uid))) 238 printf("%-10d %-10.10s", shmid, pw->pw_name); 239 else printf("%-10d %-10.10d", shmid, buf.shm_perm.uid); 240 printf(" %-10o %-10lu %-10ld %-6s %-6s\n", buf.shm_perm.mode & 0777, 241 (unsigned long) buf.shm_segsz, 242 (long) buf.shm_nattch, 243 buf.shm_perm.mode & SHM_DEST ? "dest" : " ", 244 buf.shm_perm.mode & SHM_LOCKED ? "locked" : " "); 245 } 246 } 247} 248 249static void sem_array(void) 250{ 251 struct seminfo info_buf; 252 struct semid_ds buf; 253 union semun u; 254 int max_nr, i,semid; 255 struct passwd *pw; 256 struct group *gr; 257 258 u.array = (unsigned short *)&info_buf; 259 if ((max_nr = semctl(0, 0, SEM_INFO, u)) < 0) { 260 perror_msg("kernel is not configured for semaphores"); 261 return; 262 } 263 264 265 if (flag(u)) { 266 printf("------ Semaphore Status --------\n"); 267 printf("used arrays = %d\n" 268 "allocated semaphores = %d\n", 269 info_buf.semusz, info_buf.semaem); 270 return; 271 } 272 if (flag(l)) { 273 printf("------ Semaphore Limits --------\n"); 274 u.array = (unsigned short *)&info_buf; 275 if ((semctl(0, 0, 3, u)) < 0) //IPC_INFO 276 return; 277 printf("max number of arrays = %d\n" 278 "max semaphores per array = %d\n" 279 "max semaphores system wide = %d\n" 280 "max ops per semop call = %d\n" 281 "semaphore max value = %d\n", 282 info_buf.semmni, 283 info_buf.semmsl, 284 info_buf.semmns, info_buf.semopm, info_buf.semvmx); 285 return; 286 } 287 288 if (flag(t)) { 289 printf("------ Semaphore Operation/Change Times --------\n"); 290 printf("%-8s %-10s %-26.24s %-26.24s\n", 291 "shmid", "owner", "last-op", "last-changed"); 292 } else if (flag(c)) { 293 printf("------ Semaphore %s --------\n", "Arrays Creators/Owners"); 294 printf("%-10s %-10s %-10s %-10s %-10s %-10s\n", 295 "semid", "perms", "cuid", "cgid", "uid", "gid"); 296 297 } else if (flag(p)){ 298 return; 299 } else { 300 printf("------ Semaphore %s --------\n", "Arrays"); 301 printf("%-10s %-10s %-10s %-10s %-10s\n", 302 "key", "semid", "owner", "perms", "nsems"); 303 } 304 305 for (i = 0; i <= max_nr; i++) { 306 u.buf = &buf; 307 if ((semid = semctl(i, 0, SEM_STAT, u)) < 0) continue; 308 pw = getpwuid(buf.sem_perm.uid); 309 if (flag(t)) { 310 if (pw) printf("%-8d %-10.10s", semid, pw->pw_name); 311 else printf("%-8d %-10d", semid, buf.sem_perm.uid); 312 313 printf(" %-26.24s", buf.sem_otime 314 ? ctime(&buf.sem_otime) : "Not set"); 315 printf(" %-26.24s\n", buf.sem_ctime 316 ? ctime(&buf.sem_ctime) : "Not set"); 317 } else if (flag(c)) { 318 printf("%-10d %-10o", semid, buf.sem_perm.mode & 0777); 319 if ((pw = getpwuid(buf.sem_perm.cuid))) printf(" %-10s", pw->pw_name); 320 else printf(" %-10d", buf.sem_perm.cuid); 321 if ((gr = getgrgid(buf.sem_perm.cgid))) printf(" %-10s", gr->gr_name); 322 else printf(" %-10d", buf.sem_perm.cgid); 323 if ((pw = getpwuid(buf.sem_perm.uid))) printf(" %-10s", pw->pw_name); 324 else printf(" %-10d", buf.sem_perm.uid); 325 if ((gr = getgrgid(buf.sem_perm.gid))) printf(" %-10s\n", gr->gr_name); 326 else printf(" %-10d\n", buf.sem_perm.gid); 327 } else { 328 printf("0x%08x ", buf.sem_perm.__key); 329 if (pw) printf("%-10d %-10.9s", semid, pw->pw_name); 330 else printf("%-10d %-9d", semid, buf.sem_perm.uid); 331 printf(" %-10o %-10ld\n", buf.sem_perm.mode & 0777, 332 (long) buf.sem_nsems); 333 } 334 } 335} 336 337static void msg_array(void) 338{ 339 struct msginfo info_buf; 340 struct msqid_ds buf; 341 int max_nr, i, msqid; 342 struct passwd *pw; 343 struct group *gr; 344 345 if ((max_nr = msgctl(0, MSG_INFO, (struct msqid_ds*)&info_buf)) < 0) { 346 perror_msg("kernel not configured for message queue"); 347 return; 348 } 349 350 if (flag(u)) { 351 printf("------ Message%s --------\n", "s: Status"); 352 printf("allocated queues = %d\n" 353 "used headers = %d\n" 354 "used space = %d bytes\n", 355 info_buf.msgpool, info_buf.msgmap, info_buf.msgtql); 356 return; 357 } 358 if (flag(l)) { 359 if ((msgctl(0, 3, (struct msqid_ds*)&info_buf)) < 0) return; //IPC_INFO 360 printf("------ Messages: Limits --------\n"); 361 printf("max queues system wide = %d\n" 362 "max size of message (bytes) = %d\n" 363 "default max size of queue (bytes) = %d\n", 364 info_buf.msgmni, info_buf.msgmax, info_buf.msgmnb); 365 return; 366 } 367 368 if (flag(t)) { 369 printf("------ Message%s --------\n", " Queues Send/Recv/Change Times"); 370 printf("%-8s %-10s %-20s %-20s %-20s\n", 371 "msqid", "owner", "send", "recv", "change"); 372 } else if (flag(p)) { 373 printf("------ Message%s --------\n", " Queues PIDs"); 374 printf("%-10s %-10s %-10s %-10s\n", 375 "msqid", "owner", "lspid", "lrpid"); 376 } else if (flag(c)) { 377 printf("------ Message%s --------\n", " Queues: Creators/Owners"); 378 printf("%-10s %-10s %-10s %-10s %-10s %-10s\n", 379 "msqid", "perms", "cuid", "cgid", "uid", "gid"); 380 } else { 381 printf("------ Message%s --------\n", " Queues"); 382 printf("%-10s %-10s %-10s %-10s %-12s %-12s\n", 383 "key", "msqid", "owner", "perms", "used-bytes", "messages"); 384 } 385 386 for (i = 0; i <= max_nr; i++) { 387 if ((msqid = msgctl(i, MSG_STAT, &buf)) < 0 ) continue; 388 pw = getpwuid(buf.msg_perm.uid); 389 if (flag(t)) { 390 if (pw) printf("%-8d %-10.10s", msqid, pw->pw_name); 391 else printf("%-8d %-10d", msqid, buf.msg_perm.uid); 392 printf(" %-20.16s", buf.msg_stime 393 ? ctime(&buf.msg_stime) + 4 : "Not set"); 394 printf(" %-20.16s", buf.msg_rtime 395 ? ctime(&buf.msg_rtime) + 4 : "Not set"); 396 printf(" %-20.16s\n", buf.msg_ctime 397 ? ctime(&buf.msg_ctime) + 4 : "Not set"); 398 } else if (flag(p)) { 399 if (pw) printf("%-8d %-10.10s", msqid, pw->pw_name); 400 else printf("%-8d %-10d", msqid, buf.msg_perm.uid); 401 printf(" %5d %5d\n", buf.msg_lspid, buf.msg_lrpid); 402 } else if (flag(c)) { 403 printf("%-10d %-10o", msqid, buf.msg_perm.mode & 0777); 404 if ((pw = getpwuid(buf.msg_perm.cuid))) printf(" %-10s", pw->pw_name); 405 else printf(" %-10d", buf.msg_perm.cuid); 406 if ((gr = getgrgid(buf.msg_perm.cgid))) printf(" %-10s", gr->gr_name); 407 else printf(" %-10d", buf.msg_perm.cgid); 408 if ((pw = getpwuid(buf.msg_perm.uid))) printf(" %-10s", pw->pw_name); 409 else printf(" %-10d", buf.msg_perm.uid); 410 if ((gr = getgrgid(buf.msg_perm.gid))) printf(" %-10s\n", gr->gr_name); 411 else printf(" %-10d\n", buf.msg_perm.gid); 412 } else { 413 printf("0x%08x ", buf.msg_perm.__key); 414 if (pw) printf("%-10d %-10.10s", msqid, pw->pw_name); 415 else printf("%-10d %-10d", msqid, buf.msg_perm.uid); 416 printf(" %-10o %-12ld %-12ld\n", buf.msg_perm.mode & 0777, 417 (long) buf.msg_cbytes, (long) buf.msg_qnum); 418 } 419 } 420} 421 422void ipcs_main(void) 423{ 424 if (flag(i)) { 425 if (flag(m)) show_shm_id(); 426 else if (flag(s)) show_sem_id(); 427 else if (flag(q)) show_msg_id(); 428 else { 429 toys.exithelp++; 430 error_exit(NULL); 431 } 432 return; 433 } 434 435 if (!(flag(m) || flag(s) || flag(q)) || flag(a)) toys.optflags |= (FLAG_m|FLAG_s|FLAG_q); 436 437 xputc('\n'); 438 if (flag(m)) { 439 shm_array(); 440 xputc('\n'); 441 } 442 if (flag(s)) { 443 sem_array(); 444 xputc('\n'); 445 } 446 if (flag(q)) { 447 msg_array(); 448 xputc('\n'); 449 } 450} 451