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ipcs.c

/* Original author unknown, may be "krishna balasub@cis.ohio-state.edu" */
/*

  Modified Sat Oct  9 10:55:28 1993 for 0.99.13

  Patches from Mike Jagdis (jaggy@purplet.demon.co.uk) applied Wed Feb
  8 12:12:21 1995 by faith@cs.unc.edu to print numeric uids if no
  passwd file entry.

  Patch from arnolds@ifns.de (Heinz-Ado Arnolds) applied Mon Jul 1
  19:30:41 1996 by janl@math.uio.no to add code missing in case PID:
  clauses.

  Patched to display the key field -- hy@picksys.com 12/18/96

  1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
  - added Native Language Support

*/

#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <errno.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#include "nls.h"

/* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
/* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
/* X/OPEN tells us to use <sys/{types,ipc,shm}.h> for shmctl() */
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/msg.h>
#include <sys/shm.h>

/*-------------------------------------------------------------------*/
/* SHM_DEST and SHM_LOCKED are defined in kernel headers,
   but inside #ifdef __KERNEL__ ... #endif */
#ifndef SHM_DEST
/* shm_mode upper byte flags */
#define SHM_DEST        01000   /* segment will be destroyed on last detach */
#define SHM_LOCKED      02000   /* segment will not be swapped */
#endif

/* For older kernels the same holds for the defines below */
#ifndef MSG_STAT
#define MSG_STAT  11
#define MSG_INFO  12
#endif

#ifndef SHM_STAT
#define SHM_STAT        13
#define SHM_INFO        14
struct shm_info {
     int   used_ids;
     ulong shm_tot; /* total allocated shm */
     ulong shm_rss; /* total resident shm */
     ulong shm_swp; /* total swapped shm */
     ulong swap_attempts;
     ulong swap_successes;
};
#endif

#ifndef SEM_STAT
#define SEM_STAT  18
#define SEM_INFO  19
#endif

/* Some versions of libc only define IPC_INFO when __USE_GNU is defined. */
#ifndef IPC_INFO
#define IPC_INFO        3
#endif
/*-------------------------------------------------------------------*/

/* The last arg of semctl is a union semun, but where is it defined?
   X/OPEN tells us to define it ourselves, but until recently
   Linux include files would also define it. */
#if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
/* union semun is defined by including <sys/sem.h> */
#else
/* according to X/OPEN we have to define it ourselves */
union semun {
      int val;
      struct semid_ds *buf;
      unsigned short int *array;
      struct seminfo *__buf;
};
#endif

/* X/OPEN (Jan 1987) does not define fields key, seq in struct ipc_perm;
   libc 4/5 does not mention struct ipc_term at all, but includes
   <linux/ipc.h>, which defines a struct ipc_perm with such fields.
   glibc-1.09 has no support for sysv ipc.
   glibc 2 uses __key, __seq */
#if defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
#define KEY __key
#else
#define KEY key
#endif

#define LIMITS 1
#define STATUS 2
#define CREATOR 3
#define TIME 4
#define PID 5

void do_shm (char format);
void do_sem (char format);
void do_msg (char format);
void print_shm (int id);
void print_msg (int id);
void print_sem (int id);

static char *progname;

static void
usage(void) {
      printf (_("usage : %s -asmq -tclup \n"), progname);
      printf (_("\t%s [-s -m -q] -i id\n"), progname);
      printf (_("\t%s -h for help.\n"), progname); 
      return;
}

static void
help (void) {
      printf (_("%s provides information on ipc facilities for"
              " which you have read access.\n"), progname);
      printf (_("Resource Specification:\n\t-m : shared_mem\n\t-q : messages\n"));
      printf (_("\t-s : semaphores\n\t-a : all (default)\n"));
      printf (_("Output Format:\n\t-t : time\n\t-p : pid\n\t-c : creator\n"));
      printf (_("\t-l : limits\n\t-u : summary\n"));
      printf (_("-i id [-s -q -m] : details on resource identified by id\n"));
      usage();
      return;
}

int
main (int argc, char **argv) {
      int opt, msg = 0, sem = 0, shm = 0, id=0, print=0; 
      char format = 0;
      char options[] = "atcluphsmqi:";

      setlocale(LC_ALL, "");
      bindtextdomain(PACKAGE, LOCALEDIR);
      textdomain(PACKAGE);

      progname = argv[0];
      while ((opt = getopt (argc, argv, options)) != -1) {
            switch (opt) {
            case 'i':
                  id = atoi (optarg);
                  print = 1;
                  break;
            case 'a':
                  msg = shm = sem = 1;
                  break;
            case 'q':
                  msg = 1;
                  break;
            case 's':
                  sem = 1;
                  break;
            case 'm':
                  shm = 1;
                  break;
            case 't':
                  format = TIME;
                  break;
            case 'c':
                  format = CREATOR;
                  break;
            case 'p':
                  format = PID;
                  break;
            case 'l':
                  format = LIMITS;
                  break;
            case 'u':
                  format = STATUS;
                  break;
            case 'h': 
                  help();
                  exit (0);
            case '?':
                  usage();
                  exit (0);
            }
      }

      if  (print) {
            if (shm) { 
                  print_shm (id);
                  exit (0);
            }
            if (sem) { 
                  print_sem (id);
                  exit (0);
            }
            if (msg) {
                  print_msg (id);
                  exit (0);
            }
            usage();
      }

      if ( !shm && !msg && !sem)
            msg = sem = shm = 1;
      printf ("\n");

      if (shm) {  
            do_shm (format);
            printf ("\n");
      }
      if (sem) {  
            do_sem (format);
            printf ("\n");
      }
      if (msg) {  
            do_msg (format);
            printf ("\n");
      }
      return 0;
}


static void
print_perms (int id, struct ipc_perm *ipcp) {
      struct passwd *pw;
      struct group *gr;

      printf ("%-10d %-10o", id, ipcp->mode & 0777);

      if ((pw = getpwuid(ipcp->cuid)))
            printf(" %-10s", pw->pw_name);
      else
            printf(" %-10d", ipcp->cuid);
      if ((gr = getgrgid(ipcp->cgid)))
            printf(" %-10s", gr->gr_name);
      else
            printf(" %-10d", ipcp->cgid);

      if ((pw = getpwuid(ipcp->uid)))
            printf(" %-10s", pw->pw_name);
      else
            printf(" %-10d", ipcp->uid);
      if ((gr = getgrgid(ipcp->gid)))
            printf(" %-10s\n", gr->gr_name);
      else
            printf(" %-10d\n", ipcp->gid);
}


void do_shm (char format)
{
      int maxid, shmid, id;
      struct shmid_ds shmseg;
      struct shm_info shm_info;
      struct shminfo shminfo;
      struct ipc_perm *ipcp = &shmseg.shm_perm;
      struct passwd *pw;

      maxid = shmctl (0, SHM_INFO, (struct shmid_ds *) (void *) &shm_info);
      if (maxid < 0) {
            printf (_("kernel not configured for shared memory\n"));
            return;
      }
      
      switch (format) {
      case LIMITS:
            printf (_("------ Shared Memory Limits --------\n"));
            if ((shmctl (0, IPC_INFO, (struct shmid_ds *) (void *) &shminfo)) < 0 )
                  return;
            /* glibc 2.1.3 and all earlier libc's have ints as fields
               of struct shminfo; glibc 2.1.91 has unsigned long; ach */
            printf (_("max number of segments = %lu\n"),
                  (unsigned long) shminfo.shmmni);
            printf (_("max seg size (kbytes) = %lu\n"),
                  (unsigned long) (shminfo.shmmax >> 10));
            printf (_("max total shared memory (pages) = %lu\n"),
                  (unsigned long) shminfo.shmall);
            printf (_("min seg size (bytes) = %lu\n"),
                  (unsigned long) shminfo.shmmin);
            return;

      case STATUS:
            printf (_("------ Shared Memory Status --------\n"));
            printf (_("segments allocated %d\n"), shm_info.used_ids);
            printf (_("pages allocated %ld\n"), shm_info.shm_tot);
            printf (_("pages resident  %ld\n"), shm_info.shm_rss);
            printf (_("pages swapped   %ld\n"), shm_info.shm_swp);
            printf (_("Swap performance: %ld attempts\t %ld successes\n"), 
                  shm_info.swap_attempts, shm_info.swap_successes);
            return;

      case CREATOR:
            printf (_("------ Shared Memory Segment Creators/Owners --------\n"));
            printf (_("%-10s %-10s %-10s %-10s %-10s %-10s\n"),
             _("shmid"),_("perms"),_("cuid"),_("cgid"),_("uid"),_("gid"));
            break;

      case TIME:
            printf (_("------ Shared Memory Attach/Detach/Change Times --------\n"));
            printf (_("%-10s %-10s %-20s %-20s %-20s\n"),
                  _("shmid"),_("owner"),_("attached"),_("detached"),
                  _("changed"));
            break;

      case PID:
            printf (_("------ Shared Memory Creator/Last-op --------\n"));
            printf (_("%-10s %-10s %-10s %-10s\n"),
                  _("shmid"),_("owner"),_("cpid"),_("lpid"));
            break;

      default:
            printf (_("------ Shared Memory Segments --------\n"));
            printf (_("%-10s %-10s %-10s %-10s %-10s %-10s %-12s\n"),
                  _("key"),_("shmid"),_("owner"),_("perms"),_("bytes"),
                  _("nattch"),_("status"));
            break;
      }

      for (id = 0; id <= maxid; id++) {
            shmid = shmctl (id, SHM_STAT, &shmseg);
            if (shmid < 0) 
                  continue;
            if (format == CREATOR)  {
                  print_perms (shmid, ipcp);
                  continue;
            }
            pw = getpwuid(ipcp->uid);
            switch (format) {
            case TIME: 
                  if (pw)
                        printf ("%-10d %-10.10s", shmid, pw->pw_name);
                  else
                        printf ("%-10d %-10d", shmid, ipcp->uid);
                  /* ctime uses static buffer: use separate calls */
                  printf("  %-20.16s", shmseg.shm_atime
                         ? ctime(&shmseg.shm_atime) + 4 : _("Not set"));
                  printf(" %-20.16s", shmseg.shm_dtime
                         ? ctime(&shmseg.shm_dtime) + 4 : _("Not set"));
                  printf(" %-20.16s\n", shmseg.shm_ctime
                         ? ctime(&shmseg.shm_ctime) + 4 : _("Not set"));
                  break;
            case PID:
                  if (pw)
                        printf ("%-10d %-10.10s", shmid, pw->pw_name);
                  else
                        printf ("%-10d %-10d", shmid, ipcp->uid);
                  printf (" %-10d %-10d\n",
                        shmseg.shm_cpid, shmseg.shm_lpid);
                  break;
                  
            default:
                    printf("0x%08x ",ipcp->KEY );
                  if (pw)
                        printf ("%-10d %-10.10s", shmid, pw->pw_name);
                  else
                        printf ("%-10d %-10d", shmid, ipcp->uid);
                  printf ("%-10o %-10lu %-10ld %-6s %-6s\n", 
                        ipcp->mode & 0777,
                        /*
                         * earlier: int, Austin has size_t
                         */
                        (unsigned long) shmseg.shm_segsz,
                        /*
                         * glibc-2.1.3 and earlier has unsigned short;
                         * Austin has shmatt_t
                         */
                        (long) shmseg.shm_nattch,
                        ipcp->mode & SHM_DEST ? _("dest") : " ",
                        ipcp->mode & SHM_LOCKED ? _("locked") : " ");
                  break;
            }
      }
      return;
}


void do_sem (char format)
{
      int maxid, semid, id;
      struct semid_ds semary;
      struct seminfo seminfo;
      struct ipc_perm *ipcp = &semary.sem_perm;
      struct passwd *pw;
      union semun arg;

      arg.array = (ushort *)  (void *) &seminfo;
      maxid = semctl (0, 0, SEM_INFO, arg);
      if (maxid < 0) {
            printf (_("kernel not configured for semaphores\n"));
            return;
      }
      
      switch (format) {
      case LIMITS:
            printf (_("------ Semaphore Limits --------\n"));
            arg.array = (ushort *) (void *) &seminfo; /* damn union */
            if ((semctl (0, 0, IPC_INFO, arg)) < 0 )
                  return;
            printf (_("max number of arrays = %d\n"), seminfo.semmni);
            printf (_("max semaphores per array = %d\n"), seminfo.semmsl);
            printf (_("max semaphores system wide = %d\n"), seminfo.semmns);
            printf (_("max ops per semop call = %d\n"), seminfo.semopm);
            printf (_("semaphore max value = %d\n"), seminfo.semvmx);
            return;

      case STATUS:
            printf (_("------ Semaphore Status --------\n"));
            printf (_("used arrays = %d\n"), seminfo.semusz);
            printf (_("allocated semaphores = %d\n"), seminfo.semaem);
            return;

      case CREATOR:
            printf (_("------ Semaphore Arrays Creators/Owners --------\n"));
            printf (_("%-10s %-10s %-10s %-10s %-10s %-10s\n"),
             _("semid"),_("perms"),_("cuid"),_("cgid"),_("uid"),("gid"));
            break;

      case TIME:
            printf (_("------ Shared Memory Operation/Change Times --------\n"));
            printf (_("%-8s %-10s %-26.24s %-26.24s\n"),
                  _("shmid"),_("owner"),_("last-op"),_("last-changed"));
            break;

      case PID:
            break;

      default:
            printf (_("------ Semaphore Arrays --------\n"));
            printf (_("%-10s %-10s %-10s %-10s %-10s\n"), 
                  _("key"),_("semid"),_("owner"),_("perms"),
                  _("nsems"));
            break;
      }

      for (id = 0; id <= maxid; id++) {
            arg.buf = (struct semid_ds *) &semary;
            semid = semctl (id, 0, SEM_STAT, arg);
            if (semid < 0)
                  continue;
            if (format == CREATOR)  {
                  print_perms (semid, ipcp);
                  continue;
            }
            pw = getpwuid(ipcp->uid);
            switch (format) {
            case TIME: 
                  if (pw)
                        printf ("%-8d %-10.10s", semid, pw->pw_name);
                  else
                        printf ("%-8d %-10d", semid, ipcp->uid);
                  printf ("  %-26.24s", semary.sem_otime
                        ? ctime(&semary.sem_otime) : _("Not set"));
                  printf (" %-26.24s\n", semary.sem_ctime
                        ? ctime(&semary.sem_ctime) : _("Not set"));
                  break;
            case PID:
                  break;
                  
            default:
                    printf("0x%08x ", ipcp->KEY);
                  if (pw)
                        printf ("%-10d %-10.9s", semid, pw->pw_name);
                  else
                        printf ("%-10d %-9d", semid, ipcp->uid);
                  printf ("%-10o %-10ld\n",
                        ipcp->mode & 0777,
                        /*
                         * glibc-2.1.3 and earlier has unsigned short;
                         * glibc-2.1.91 has variation between
                         * unsigned short and unsigned long
                         * Austin prescribes unsigned short.
                         */
                        (long) semary.sem_nsems);
                  break;
            }
      }
}


void do_msg (char format)
{
      int maxid, msqid, id;
      struct msqid_ds msgque;
      struct msginfo msginfo;
      struct ipc_perm *ipcp = &msgque.msg_perm;
      struct passwd *pw;

      maxid = msgctl (0, MSG_INFO, (struct msqid_ds *) (void *) &msginfo);
      if (maxid < 0) {
            printf (_("kernel not configured for message queues\n"));
            return;
      }
      
      switch (format) {
      case LIMITS:
            if ((msgctl (0, IPC_INFO, (struct msqid_ds *) (void *) &msginfo)) < 0 )
                  return;
            printf (_("------ Messages: Limits --------\n"));
            printf (_("max queues system wide = %d\n"), msginfo.msgmni);
            printf (_("max size of message (bytes) = %d\n"), msginfo.msgmax);
            printf (_("default max size of queue (bytes) = %d\n"), msginfo.msgmnb);
            return;

      case STATUS:
            printf (_("------ Messages: Status --------\n"));
            printf (_("allocated queues = %d\n"), msginfo.msgpool);
            printf (_("used headers = %d\n"), msginfo.msgmap);
            printf (_("used space = %d bytes\n"), msginfo.msgtql);
            return;

      case CREATOR:
            printf (_("------ Message Queues: Creators/Owners --------\n"));
            printf (_("%-10s %-10s %-10s %-10s %-10s %-10s\n"),
             _("msqid"),_("perms"),_("cuid"),_("cgid"),_("uid"),_("gid"));
            break;

      case TIME:
            printf (_("------ Message Queues Send/Recv/Change Times --------\n"));
            printf (_("%-8s %-10s %-20s %-20s %-20s\n"),
                  _("msqid"),_("owner"),_("send"),_("recv"),_("change"));
            break;

      case PID:
            printf (_("------ Message Queues PIDs --------\n"));
            printf (_("%-10s %-10s %-10s %-10s\n"),
                  _("msqid"),_("owner"),_("lspid"),_("lrpid"));
            break;

      default:
            printf (_("------ Message Queues --------\n"));
            printf (_("%-10s %-10s %-10s %-10s %-12s %-12s\n"),
                  _("key"), _("msqid"), _("owner"), _("perms"),
                  _("used-bytes"), _("messages"));
            break;
      }

      for (id = 0; id <= maxid; id++) {
            msqid = msgctl (id, MSG_STAT, &msgque);
            if (msqid < 0)
                  continue;
            if (format == CREATOR)  {
                  print_perms (msqid, ipcp);
                  continue;
            }
            pw = getpwuid(ipcp->uid);
            switch (format) {
            case TIME:
                  if (pw)
                        printf ("%-8d %-10.10s", msqid, pw->pw_name);
                  else
                        printf ("%-8d %-10d", msqid, ipcp->uid);
                  printf (" %-20.16s", msgque.msg_stime
                        ? ctime(&msgque.msg_stime) + 4 : _("Not set"));
                  printf (" %-20.16s", msgque.msg_rtime
                        ? ctime(&msgque.msg_rtime) + 4 : _("Not set"));
                  printf (" %-20.16s\n", msgque.msg_ctime
                        ? ctime(&msgque.msg_ctime) + 4 : _("Not set"));
                  break;
            case PID:
                  if (pw)
                        printf ("%-8d %-10.10s", msqid, pw->pw_name);
                  else
                        printf ("%-8d %-10d", msqid, ipcp->uid);
                  printf ("  %5d     %5d\n",
                        msgque.msg_lspid, msgque.msg_lrpid);
                  break;

            default:
                    printf( "0x%08x ",ipcp->KEY );
                  if (pw)
                        printf ("%-10d %-10.10s", msqid, pw->pw_name);
                  else
                        printf ("%-10d %-10d", msqid, ipcp->uid);
                  printf (" %-10o %-12ld %-12ld\n",
                        ipcp->mode & 0777,
                        /*
                         * glibc-2.1.3 and earlier has unsigned short;
                         * glibc-2.1.91 has variation between
                         * unsigned short, unsigned long
                         * Austin has msgqnum_t
                         */
                        (long) msgque.msg_cbytes,
                        (long) msgque.msg_qnum);
                  break;
            }
      }
      return;
}


void print_shm (int shmid)
{
      struct shmid_ds shmds;
      struct ipc_perm *ipcp = &shmds.shm_perm;

      if (shmctl (shmid, IPC_STAT, &shmds) == -1) {
            perror ("shmctl ");
            return;
      }

      printf (_("\nShared memory Segment shmid=%d\n"), shmid);
      printf (_("uid=%d\tgid=%d\tcuid=%d\tcgid=%d\n"),
            ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid);
      printf (_("mode=%#o\taccess_perms=%#o\n"),
            ipcp->mode, ipcp->mode & 0777);
      printf (_("bytes=%ld\tlpid=%d\tcpid=%d\tnattch=%ld\n"),
            (long) shmds.shm_segsz, shmds.shm_lpid, shmds.shm_cpid,
            (long) shmds.shm_nattch);
      printf (_("att_time=%-26.24s\n"),
            shmds.shm_atime ? ctime (&shmds.shm_atime) : _("Not set"));
      printf (_("det_time=%-26.24s\n"),
            shmds.shm_dtime ? ctime (&shmds.shm_dtime) : _("Not set"));
      printf (_("change_time=%-26.24s\n"), ctime (&shmds.shm_ctime));
      printf ("\n");
      return;
}


void print_msg (int msqid)
{
      struct msqid_ds buf;
      struct ipc_perm *ipcp = &buf.msg_perm;

      if (msgctl (msqid, IPC_STAT, &buf) == -1) {
            perror ("msgctl ");
            return;
      }
      printf (_("\nMessage Queue msqid=%d\n"), msqid);
      printf (_("uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n"),
            ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid, ipcp->mode);
      printf (_("cbytes=%ld\tqbytes=%ld\tqnum=%ld\tlspid=%d\tlrpid=%d\n"),
            /*
             * glibc-2.1.3 and earlier has unsigned short;
             * glibc-2.1.91 has variation between
             * unsigned short, unsigned long
             * Austin has msgqnum_t (for msg_qbytes)
             */
            (long) buf.msg_cbytes, (long) buf.msg_qbytes,
            (long) buf.msg_qnum, buf.msg_lspid, buf.msg_lrpid);
      printf (_("send_time=%-26.24s\n"),
            buf.msg_stime ? ctime (&buf.msg_stime) : _("Not set"));
      printf (_("rcv_time=%-26.24s\n"),
            buf.msg_rtime ? ctime (&buf.msg_rtime) : _("Not set"));
      printf (_("change_time=%-26.24s\n"),
            buf.msg_ctime ? ctime (&buf.msg_ctime) : _("Not set"));
      printf ("\n");
      return;
}

void print_sem (int semid)
{
      struct semid_ds semds;
      struct ipc_perm *ipcp = &semds.sem_perm;
      union semun arg;
      int i;

      arg.buf = &semds;
      if (semctl (semid, 0, IPC_STAT, arg) < 0) {
            perror ("semctl ");
            return;
      }
      printf (_("\nSemaphore Array semid=%d\n"), semid);
      printf (_("uid=%d\t gid=%d\t cuid=%d\t cgid=%d\n"),
            ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid);
      printf (_("mode=%#o, access_perms=%#o\n"),
            ipcp->mode, ipcp->mode & 0777);
      printf (_("nsems = %ld\n"), (long) semds.sem_nsems);
      printf (_("otime = %-26.24s\n"),
            semds.sem_otime ? ctime (&semds.sem_otime) : _("Not set"));
      printf (_("ctime = %-26.24s\n"), ctime (&semds.sem_ctime)); 

      printf (_("%-10s %-10s %-10s %-10s %-10s\n"),
            _("semnum"),_("value"),_("ncount"),_("zcount"),_("pid"));
      arg.val = 0;
      for (i=0; i< semds.sem_nsems; i++) {
            int val, ncnt, zcnt, pid;
            val = semctl (semid, i, GETVAL, arg);
            ncnt = semctl (semid, i, GETNCNT, arg);
            zcnt = semctl (semid, i, GETZCNT, arg);
            pid = semctl (semid, i, GETPID, arg);
            if (val < 0 || ncnt < 0 || zcnt < 0 || pid < 0) {
                  perror ("semctl ");
                  exit (1);
            }
            printf ("%-10d %-10d %-10d %-10d %-10d\n",
                  i, val, ncnt, zcnt, pid);
      }
      printf ("\n");
      return;
}

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