553 lines
13 KiB
C
553 lines
13 KiB
C
/* Original author unknown, but may be "krishna balasub@cis.ohio-state.edu"
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Modified Sat Oct 9 10:55:28 1993 for 0.99.13 */
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/* Patches from Mike Jagdis (jaggy@purplet.demon.co.uk) applied Wed Feb 8
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12:12:21 1995 by faith@cs.unc.edu to print numeric uids if no passwd file
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entry. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <errno.h>
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#include <time.h>
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#include <pwd.h>
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#include <grp.h>
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#define __KERNEL__
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#include <linux/linkage.h>
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#include <sys/sem.h>
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#include <sys/msg.h>
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#include <sys/shm.h>
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#define LIMITS 1
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#define STATUS 2
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#define CREATOR 3
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#define TIME 4
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#define PID 5
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void do_shm (char format);
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void do_sem (char format);
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void do_msg (char format);
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void print_shm (int id);
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void print_msg (int id);
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void print_sem (int id);
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static char *progname;
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void usage(void)
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{
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printf ("usage : %s -asmq -tclup \n", progname);
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printf ("\t%s [-s -m -q] -i id\n", progname);
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printf ("\t%s -h for help.\n", progname);
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return;
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}
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void help (void)
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{
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printf ("%s provides information on ipc facilities for", progname);
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printf (" which you have read access.\n");
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printf ("Resource Specification:\n\t-m : shared_mem\n\t-q : messages\n");
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printf ("\t-s : semaphores\n\t-a : all (default)\n");
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printf ("Output Format:\n\t-t : time\n\t-p : pid\n\t-c : creator\n");
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printf ("\t-l : limits\n\t-u : summary\n");
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printf ("-i id [-s -q -m] : details on resource identified by id\n");
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usage();
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return;
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}
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int main (int argc, char **argv)
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{
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int opt, msg = 0, sem = 0, shm = 0, id=0, print=0;
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char format = 0;
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char options[] = "atcluphsmqi:";
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progname = argv[0];
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while ((opt = getopt (argc, argv, options)) != EOF) {
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switch (opt) {
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case 'i':
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id = atoi (optarg);
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print = 1;
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break;
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case 'a':
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msg = shm = sem = 1;
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break;
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case 'q':
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msg = 1;
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break;
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case 's':
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sem = 1;
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break;
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case 'm':
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shm = 1;
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break;
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case 't':
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format = TIME;
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break;
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case 'c':
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format = CREATOR;
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break;
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case 'p':
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format = PID;
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break;
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case 'l':
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format = LIMITS;
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break;
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case 'u':
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format = STATUS;
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break;
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case 'h':
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help();
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exit (0);
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case '?':
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usage();
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exit (0);
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}
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}
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if (print) {
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if (shm) {
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print_shm (id);
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exit (0);
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}
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if (sem) {
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print_sem (id);
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exit (0);
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}
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if (msg) {
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print_msg (id);
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exit (0);
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}
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usage();
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}
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if ( !shm && !msg && !sem)
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msg = sem = shm = 1;
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printf ("\n");
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if (shm) {
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do_shm (format);
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printf ("\n");
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}
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if (sem) {
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do_sem (format);
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printf ("\n");
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}
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if (msg) {
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do_msg (format);
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printf ("\n");
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}
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return 0;
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}
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void print_perms (int id, struct ipc_perm *ipcp)
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{
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struct passwd *pw;
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struct group *gr;
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printf ("%-10d%-10o", id, ipcp->mode & 0777);
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if ((pw = getpwuid(ipcp->cuid)))
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printf("%-10s", pw->pw_name);
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else
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printf("%-10d", ipcp->cuid);
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if ((gr = getgrgid(ipcp->cgid)))
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printf("%-10s", gr->gr_name);
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else
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printf("%-10d", ipcp->cgid);
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if ((pw = getpwuid(ipcp->uid)))
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printf("%-10s", pw->pw_name);
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else
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printf("%-10d", ipcp->uid);
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if ((gr = getgrgid(ipcp->gid)))
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printf("%-10s\n", gr->gr_name);
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else
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printf("%-10d\n", ipcp->gid);
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}
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void do_shm (char format)
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{
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int maxid, shmid, id;
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struct shmid_ds shmseg;
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struct shm_info shm_info;
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struct shminfo shminfo;
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struct ipc_perm *ipcp = &shmseg.shm_perm;
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struct passwd *pw;
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maxid = shmctl (0, SHM_INFO, (struct shmid_ds *) &shm_info);
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if (maxid < 0) {
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printf ("kernel not configured for shared memory\n");
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return;
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}
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switch (format) {
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case LIMITS:
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printf ("------ Shared Memory Limits --------\n");
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if ((shmctl (0, IPC_INFO, (struct shmid_ds *) &shminfo)) < 0 )
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return;
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printf ("max number of segments = %d\n", shminfo.shmmni);
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printf ("max seg size (kbytes) = %d\n", shminfo.shmmax >> 10);
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printf ("max total shared memory (kbytes) = %d\n", shminfo.shmall << 2);
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printf ("min seg size (bytes) = %d\n", shminfo.shmmin);
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return;
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case STATUS:
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printf ("------ Shared Memory Status --------\n");
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printf ("segments allocated %d\n", shm_info.used_ids);
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printf ("pages allocated %d\n", shm_info.shm_tot);
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printf ("pages resident %d\n", shm_info.shm_rss);
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printf ("pages swapped %d\n", shm_info.shm_swp);
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printf ("Swap performance: %d attempts\t %d successes\n",
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shm_info.swap_attempts, shm_info.swap_successes);
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return;
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case CREATOR:
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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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break;
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case TIME:
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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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break;
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case PID:
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printf ("------ Shared Memory Creator/Last-op --------\n");
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printf ("%-10s%-10s%-10s%-10s\n","shmid","owner","cpid","lpid");
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break;
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default:
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printf ("------ Shared Memory Segments --------\n");
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printf ("%-10s%-10s%-10s%-10s%-10s%-12s\n", "shmid","owner",
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"perms","bytes","nattch","status");
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break;
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}
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for (id = 0; id <= maxid; id++) {
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shmid = shmctl (id, SHM_STAT, &shmseg);
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if (shmid < 0)
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continue;
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if (format == CREATOR) {
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print_perms (shmid, ipcp);
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continue;
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}
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pw = getpwuid(ipcp->uid);
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switch (format) {
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case TIME:
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if (pw)
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printf ("%-10d%-10.10s", shmid, pw->pw_name);
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else
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printf ("%-10d%-10d", shmid, ipcp->uid);
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printf(" %-20.16s%-20.16s%-20.16s\n",
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shmseg.shm_atime ? ctime(&shmseg.shm_atime) + 4 : "Not set",
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shmseg.shm_dtime ? ctime(&shmseg.shm_dtime) + 4 : "Not set",
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shmseg.shm_ctime ? ctime(&shmseg.shm_ctime) + 4 : "Not set");
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break;
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case PID:
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if (pw)
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printf ("%-10d%-10.10s", shmid, pw->pw_name);
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else
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printf ("%-10d%-10d", shmid, ipcp->uid);
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printf ("%-10d%-10d\n",
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shmseg.shm_cpid, shmseg.shm_lpid);
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break;
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default:
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if (pw)
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printf ("%-10d%-10.10s", shmid, pw->pw_name);
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else
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printf ("%-10d%-10d", shmid, ipcp->uid);
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printf ("%-10o%-10d%-10d%-6s%-6s\n",
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ipcp->mode & 0777,
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shmseg.shm_segsz, shmseg.shm_nattch,
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ipcp->mode & SHM_DEST ? "dest" : " ",
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ipcp->mode & SHM_LOCKED ? "locked" : " ");
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break;
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}
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}
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return;
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}
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void do_sem (char format)
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{
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int maxid, semid, id;
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struct semid_ds semary;
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struct seminfo seminfo;
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struct ipc_perm *ipcp = &semary.sem_perm;
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struct passwd *pw;
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union semun arg;
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arg.array = (ushort *) &seminfo;
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maxid = semctl (0, 0, SEM_INFO, arg);
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if (maxid < 0) {
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printf ("kernel not configured for semaphores\n");
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return;
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}
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switch (format) {
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case LIMITS:
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printf ("------ Semaphore Limits --------\n");
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arg.array = (ushort *) &seminfo; /* damn union */
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if ((semctl (0, 0, IPC_INFO, arg)) < 0 )
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return;
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printf ("max number of arrays = %d\n", seminfo.semmni);
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printf ("max semaphores per array = %d\n", seminfo.semmsl);
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printf ("max semaphores system wide = %d\n", seminfo.semmns);
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printf ("max ops per semop call = %d\n", seminfo.semopm);
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printf ("semaphore max value = %d\n", seminfo.semvmx);
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return;
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case STATUS:
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printf ("------ Semaphore Status --------\n");
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printf ("used arrays = %d\n", seminfo.semusz);
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printf ("allocated semaphores = %d\n", seminfo.semaem);
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return;
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case CREATOR:
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printf ("------ Semaphore Arrays Creators/Owners --------\n");
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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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break;
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case TIME:
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printf ("------ Shared Memory 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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break;
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case PID:
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break;
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default:
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printf ("------ Semaphore Arrays --------\n");
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printf ("%-10s%-10s%-10s%-10s%-12s\n",
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"semid","owner","perms","nsems","status");
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break;
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}
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for (id = 0; id <= maxid; id++) {
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arg.buf = (struct semid_ds *) &semary;
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semid = semctl (id, 0, SEM_STAT, arg);
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if (semid < 0)
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continue;
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if (format == CREATOR) {
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print_perms (semid, ipcp);
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continue;
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}
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pw = getpwuid(ipcp->uid);
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switch (format) {
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case TIME:
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if (pw)
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printf ("%-8d%-10.10s", semid, pw->pw_name);
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else
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printf ("%-8d%-10d", semid, ipcp->uid);
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printf (" %-26.24s %-26.24s\n",
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semary.sem_otime ? ctime(&semary.sem_otime) : "Not set",
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semary.sem_ctime ? ctime(&semary.sem_ctime) : "Not set");
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break;
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case PID:
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break;
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default:
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if (pw)
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printf ("%-10d%-10.9s", semid, pw->pw_name);
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else
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printf ("%-10d%-9d", semid, ipcp->uid);
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printf ("%-10o%-10d\n",
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ipcp->mode & 0777,
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semary.sem_nsems);
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break;
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}
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}
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return;
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}
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void do_msg (char format)
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{
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int maxid, msqid, id;
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struct msqid_ds msgque;
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struct msginfo msginfo;
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struct ipc_perm *ipcp = &msgque.msg_perm;
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struct passwd *pw;
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maxid = msgctl (0, MSG_INFO, (struct msqid_ds *) &msginfo);
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if (maxid < 0) {
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printf ("kernel not configured for shared memory\n");
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return;
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}
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switch (format) {
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case LIMITS:
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if ((msgctl (0, IPC_INFO, (struct msqid_ds *) &msginfo)) < 0 )
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return;
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printf ("------ Messages: Limits --------\n");
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printf ("max queues system wide = %d\n", msginfo.msgmni);
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printf ("max size of message (bytes) = %d\n", msginfo.msgmax);
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printf ("default max size of queue (bytes) = %d\n", msginfo.msgmnb);
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return;
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case STATUS:
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printf ("------ Messages: Status --------\n");
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printf ("allocated queues = %d\n", msginfo.msgpool);
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printf ("used headers = %d\n", msginfo.msgmap);
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printf ("used space = %d bytes\n", msginfo.msgtql);
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return;
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case CREATOR:
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printf ("------ Message Queues: Creators/Owners --------\n");
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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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break;
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case TIME:
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printf ("------ Message Queues Send/Recv/Change Times --------\n");
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printf ("%-8s%-10s %-20s%-20s%-20s\n",
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"msqid","owner","send","recv","change");
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break;
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case PID:
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break;
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default:
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printf ("------ Message Queues --------\n");
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printf ("%-10s%-10s%-10s%-12s%-12s\n", "msqid","owner",
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"perms", "used-bytes", "messages");
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break;
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}
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for (id = 0; id <= maxid; id++) {
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msqid = msgctl (id, MSG_STAT, &msgque);
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if (msqid < 0)
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continue;
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if (format == CREATOR) {
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print_perms (msqid, ipcp);
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continue;
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}
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pw = getpwuid(ipcp->uid);
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switch (format) {
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case TIME:
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if (pw)
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printf ("%-8d%-10.10s", msqid, pw->pw_name);
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else
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printf ("%-8d%-10d", msqid, ipcp->uid);
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printf (" %-20.16s%-20.16s%-20.16s\n",
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msgque.msg_stime ? ctime(&msgque.msg_stime) + 4 : "Not set",
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msgque.msg_rtime ? ctime(&msgque.msg_rtime) + 4 : "Not set",
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msgque.msg_ctime ? ctime(&msgque.msg_ctime) + 4 : "Not set");
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break;
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case PID:
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break;
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default:
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if (pw)
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printf ("%-10d%-10.10s", msqid, pw->pw_name);
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else
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printf ("%-10d%-10d", msqid, ipcp->uid);
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printf ("%-10o%-12d%-12d\n",
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ipcp->mode & 0777, msgque.msg_cbytes,
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msgque.msg_qnum);
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break;
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}
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}
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return;
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}
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void print_shm (int shmid)
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{
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struct shmid_ds shmds;
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struct ipc_perm *ipcp = &shmds.shm_perm;
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if (shmctl (shmid, IPC_STAT, &shmds) == -1) {
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perror ("shmctl ");
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return;
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}
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printf ("\nShared memory Segment shmid=%d\n", shmid);
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printf ("uid=%d\tgid=%d\tcuid=%d\tcgid=%d\n",
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ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid);
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printf ("mode=%#o\taccess_perms=%#o\n", ipcp->mode, ipcp->mode & 0777);
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printf ("bytes=%d\tlpid=%d\tcpid=%d\tnattch=%d\n",
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shmds.shm_segsz, shmds.shm_lpid, shmds.shm_cpid,
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shmds.shm_nattch);
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printf ("att_time=%s", shmds.shm_atime ? ctime (&shmds.shm_atime) :
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"Not set\n");
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printf ("det_time=%s", shmds.shm_dtime ? ctime (&shmds.shm_dtime) :
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"Not set\n");
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printf ("change_time=%s", ctime (&shmds.shm_ctime));
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printf ("\n");
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return;
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}
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void print_msg (int msqid)
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{
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struct msqid_ds buf;
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struct ipc_perm *ipcp = &buf.msg_perm;
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if (msgctl (msqid, IPC_STAT, &buf) == -1) {
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perror ("msgctl ");
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return;
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}
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printf ("\nMessage Queue msqid=%d\n", msqid);
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printf ("uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n",
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ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid, ipcp->mode);
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printf ("cbytes=%d\tqbytes=%d\tqnum=%d\tlspid=%d\tlrpid=%d\n",
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buf.msg_cbytes, buf.msg_qbytes, buf.msg_qnum, buf.msg_lspid,
|
|
buf.msg_lrpid);
|
|
printf ("send_time=%srcv_time=%schange_time=%s",
|
|
buf.msg_rtime? ctime (&buf.msg_rtime) : "Not Set\n",
|
|
buf.msg_stime? ctime (&buf.msg_stime) : "Not Set\n",
|
|
buf.msg_ctime? ctime (&buf.msg_ctime) : "Not Set\n");
|
|
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 = %d\n", semds.sem_nsems);
|
|
printf ("otime = %s", semds.sem_otime ? ctime (&semds.sem_otime) :
|
|
"Not set\n");
|
|
printf ("ctime = %s", 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;
|
|
}
|
|
|