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about comparing signed and unsigned and make stuff static. text data bss dec hex filename 6944 0 0 6944 1b20 util-linux/ipcs.o.oorig 6509 0 0 6509 196d util-linux/ipcs.o TODO: bb_getopt_ulflags, and further simplifications
671 lines
16 KiB
C
671 lines
16 KiB
C
/*
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* ipcs.c -- provides information on allocated ipc resources.
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*
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* 01 Sept 2004 - Rodney Radford <rradford@mindspring.com>
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* Adapted for busybox from util-linux-2.12a.
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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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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/* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
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/* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
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/* X/OPEN tells us to use <sys/{types,ipc,shm}.h> for shmctl() */
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#include <sys/types.h>
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#include <sys/ipc.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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#include "busybox.h"
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/*-------------------------------------------------------------------*/
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/* SHM_DEST and SHM_LOCKED are defined in kernel headers,
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but inside #ifdef __KERNEL__ ... #endif */
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#ifndef SHM_DEST
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/* shm_mode upper byte flags */
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#define SHM_DEST 01000 /* segment will be destroyed on last detach */
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#define SHM_LOCKED 02000 /* segment will not be swapped */
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#endif
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/* For older kernels the same holds for the defines below */
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#ifndef MSG_STAT
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#define MSG_STAT 11
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#define MSG_INFO 12
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#endif
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#ifndef SHM_STAT
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#define SHM_STAT 13
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#define SHM_INFO 14
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struct shm_info {
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int used_ids;
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ulong shm_tot; /* total allocated shm */
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ulong shm_rss; /* total resident shm */
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ulong shm_swp; /* total swapped shm */
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ulong swap_attempts;
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ulong swap_successes;
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};
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#endif
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#ifndef SEM_STAT
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#define SEM_STAT 18
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#define SEM_INFO 19
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#endif
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/* Some versions of libc only define IPC_INFO when __USE_GNU is defined. */
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#ifndef IPC_INFO
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#define IPC_INFO 3
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#endif
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/*-------------------------------------------------------------------*/
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/* The last arg of semctl is a union semun, but where is it defined?
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X/OPEN tells us to define it ourselves, but until recently
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Linux include files would also define it. */
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#if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
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/* union semun is defined by including <sys/sem.h> */
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#else
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/* according to X/OPEN we have to define it ourselves */
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union semun {
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int val;
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struct semid_ds *buf;
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unsigned short int *array;
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struct seminfo *__buf;
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};
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#endif
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/* X/OPEN (Jan 1987) does not define fields key, seq in struct ipc_perm;
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libc 4/5 does not mention struct ipc_term at all, but includes
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<linux/ipc.h>, which defines a struct ipc_perm with such fields.
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glibc-1.09 has no support for sysv ipc.
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glibc 2 uses __key, __seq */
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#if defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
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#define KEY __key
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#else
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#define KEY key
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#endif
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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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static void print_perms (int id, struct ipc_perm *ipcp) {
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struct passwd *pw;
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struct group *gr;
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bb_printf ("%-10d %-10o", id, ipcp->mode & 0777);
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if ((pw = getpwuid(ipcp->cuid)))
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bb_printf(" %-10s", pw->pw_name);
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else
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bb_printf(" %-10d", ipcp->cuid);
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if ((gr = getgrgid(ipcp->cgid)))
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bb_printf(" %-10s", gr->gr_name);
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else
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bb_printf(" %-10d", ipcp->cgid);
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if ((pw = getpwuid(ipcp->uid)))
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bb_printf(" %-10s", pw->pw_name);
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else
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bb_printf(" %-10d", ipcp->uid);
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if ((gr = getgrgid(ipcp->gid)))
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bb_printf(" %-10s\n", gr->gr_name);
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else
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bb_printf(" %-10d\n", ipcp->gid);
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}
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static 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 *) (void *) &shm_info);
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if (maxid < 0) {
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bb_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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bb_printf ("------ Shared Memory Limits --------\n");
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if ((shmctl (0, IPC_INFO, (struct shmid_ds *) (void *) &shminfo)) < 0 )
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return;
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/* glibc 2.1.3 and all earlier libc's have ints as fields
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of struct shminfo; glibc 2.1.91 has unsigned long; ach */
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bb_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) shminfo.shmmni,
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(unsigned long) (shminfo.shmmax >> 10),
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(unsigned long) shminfo.shmall,
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(unsigned long) shminfo.shmmin);
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return;
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case STATUS:
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bb_printf ("------ Shared Memory Status --------\n"
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"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_info.used_ids,
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shm_info.shm_tot,
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shm_info.shm_rss,
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shm_info.shm_swp,
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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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bb_printf ("------ Shared Memory Segment Creators/Owners --------\n"
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"%-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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bb_printf ("------ Shared Memory Attach/Detach/Change Times --------\n"
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"%-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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bb_printf ("------ Shared Memory Creator/Last-op --------\n"
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"%-10s %-10s %-10s %-10s\n",
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"shmid","owner","cpid","lpid");
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break;
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default:
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bb_printf ("------ Shared Memory Segments --------\n"
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"%-10s %-10s %-10s %-10s %-10s %-10s %-12s\n",
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"key","shmid","owner","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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bb_printf ("%-10d %-10.10s", shmid, pw->pw_name);
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else
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bb_printf ("%-10d %-10d", shmid, ipcp->uid);
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/* ctime uses static buffer: use separate calls */
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bb_printf(" %-20.16s", shmseg.shm_atime
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? ctime(&shmseg.shm_atime) + 4 : "Not set");
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bb_printf(" %-20.16s", shmseg.shm_dtime
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? ctime(&shmseg.shm_dtime) + 4 : "Not set");
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bb_printf(" %-20.16s\n", shmseg.shm_ctime
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? 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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bb_printf ("%-10d %-10.10s", shmid, pw->pw_name);
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else
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bb_printf ("%-10d %-10d", shmid, ipcp->uid);
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bb_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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bb_printf("0x%08x ",ipcp->KEY );
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if (pw)
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bb_printf ("%-10d %-10.10s", shmid, pw->pw_name);
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else
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bb_printf ("%-10d %-10d", shmid, ipcp->uid);
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bb_printf ("%-10o %-10lu %-10ld %-6s %-6s\n",
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ipcp->mode & 0777,
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/*
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* earlier: int, Austin has size_t
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*/
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(unsigned long) shmseg.shm_segsz,
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/*
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* glibc-2.1.3 and earlier has unsigned short;
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* Austin has shmatt_t
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*/
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(long) 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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static 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 *) (void *) &seminfo;
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maxid = semctl (0, 0, SEM_INFO, arg);
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if (maxid < 0) {
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bb_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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bb_printf ("------ Semaphore Limits --------\n");
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arg.array = (ushort *) (void *) &seminfo; /* damn union */
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if ((semctl (0, 0, IPC_INFO, arg)) < 0 )
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return;
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bb_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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seminfo.semmni,
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seminfo.semmsl,
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seminfo.semmns,
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seminfo.semopm,
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seminfo.semvmx);
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return;
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case STATUS:
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bb_printf ("------ Semaphore Status --------\n"
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"used arrays = %d\n"
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"allocated semaphores = %d\n",
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seminfo.semusz,
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seminfo.semaem);
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return;
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case CREATOR:
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bb_printf ("------ Semaphore Arrays Creators/Owners --------\n"
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"%-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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bb_printf ("------ Shared Memory Operation/Change Times --------\n"
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"%-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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bb_printf ("------ Semaphore Arrays --------\n"
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"%-10s %-10s %-10s %-10s %-10s\n",
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"key","semid","owner","perms","nsems");
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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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bb_printf ("%-8d %-10.10s", semid, pw->pw_name);
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else
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bb_printf ("%-8d %-10d", semid, ipcp->uid);
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bb_printf (" %-26.24s", semary.sem_otime
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? ctime(&semary.sem_otime) : "Not set");
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bb_printf (" %-26.24s\n", semary.sem_ctime
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? 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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bb_printf("0x%08x ", ipcp->KEY);
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if (pw)
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bb_printf ("%-10d %-10.9s", semid, pw->pw_name);
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else
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bb_printf ("%-10d %-9d", semid, ipcp->uid);
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bb_printf ("%-10o %-10ld\n",
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ipcp->mode & 0777,
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/*
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* glibc-2.1.3 and earlier has unsigned short;
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* glibc-2.1.91 has variation between
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* unsigned short and unsigned long
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* Austin prescribes unsigned short.
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*/
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(long) semary.sem_nsems);
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break;
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}
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}
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}
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static 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 *) (void *) &msginfo);
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if (maxid < 0) {
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bb_printf ("kernel not configured for message queues\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 *) (void *) &msginfo)) < 0 )
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return;
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bb_printf ("------ Messages: Limits --------\n"
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"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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msginfo.msgmni,
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msginfo.msgmax,
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msginfo.msgmnb);
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return;
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case STATUS:
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bb_printf ("------ Messages: Status --------\n"
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"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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msginfo.msgpool,
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msginfo.msgmap,
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msginfo.msgtql);
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return;
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case CREATOR:
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bb_printf ("------ Message Queues: Creators/Owners --------\n"
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"%-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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bb_printf ("------ Message Queues Send/Recv/Change Times --------\n"
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"%-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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bb_printf ("------ Message Queues PIDs --------\n"
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"%-10s %-10s %-10s %-10s\n",
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"msqid","owner","lspid","lrpid");
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break;
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default:
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bb_printf ("------ Message Queues --------\n"
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"%-10s %-10s %-10s %-10s %-12s %-12s\n",
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"key","msqid","owner","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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bb_printf ("%-8d %-10.10s", msqid, pw->pw_name);
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else
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bb_printf ("%-8d %-10d", msqid, ipcp->uid);
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bb_printf (" %-20.16s", msgque.msg_stime
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? ctime(&msgque.msg_stime) + 4 : "Not set");
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bb_printf (" %-20.16s", msgque.msg_rtime
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? ctime(&msgque.msg_rtime) + 4 : "Not set");
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bb_printf (" %-20.16s\n", msgque.msg_ctime
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? ctime(&msgque.msg_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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bb_printf ("%-8d %-10.10s", msqid, pw->pw_name);
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else
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bb_printf ("%-8d %-10d", msqid, ipcp->uid);
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bb_printf (" %5d %5d\n",
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msgque.msg_lspid, msgque.msg_lrpid);
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break;
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default:
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bb_printf( "0x%08x ",ipcp->KEY );
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if (pw)
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bb_printf ("%-10d %-10.10s", msqid, pw->pw_name);
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else
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bb_printf ("%-10d %-10d", msqid, ipcp->uid);
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bb_printf (" %-10o %-12ld %-12ld\n",
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ipcp->mode & 0777,
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/*
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* glibc-2.1.3 and earlier has unsigned short;
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* glibc-2.1.91 has variation between
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* unsigned short, unsigned long
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* Austin has msgqnum_t
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*/
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(long) msgque.msg_cbytes,
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(long) 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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static 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;
|
|
|
|
if (shmctl (shmid, IPC_STAT, &shmds) == -1) {
|
|
perror ("shmctl ");
|
|
return;
|
|
}
|
|
|
|
bb_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"
|
|
"att_time=%-26.24s\n"
|
|
"det_time=%-26.24s\n"
|
|
"change_time=%-26.24s\n"
|
|
"\n",
|
|
shmid,
|
|
ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid,
|
|
ipcp->mode, ipcp->mode & 0777,
|
|
(long) shmds.shm_segsz, shmds.shm_lpid, shmds.shm_cpid,
|
|
(long) shmds.shm_nattch,
|
|
shmds.shm_atime ? ctime (&shmds.shm_atime) : "Not set",
|
|
shmds.shm_dtime ? ctime (&shmds.shm_dtime) : "Not set",
|
|
ctime (&shmds.shm_ctime));
|
|
return;
|
|
}
|
|
|
|
|
|
static 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;
|
|
}
|
|
|
|
bb_printf ("\nMessage Queue msqid=%d\n"
|
|
"uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n"
|
|
"cbytes=%ld\tqbytes=%ld\tqnum=%ld\tlspid=%d\tlrpid=%d\n"
|
|
"send_time=%-26.24s\n"
|
|
"rcv_time=%-26.24s\n"
|
|
"change_time=%-26.24s\n"
|
|
"\n",
|
|
msqid,
|
|
ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid, ipcp->mode,
|
|
/*
|
|
* 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,
|
|
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");
|
|
return;
|
|
}
|
|
|
|
static void print_sem (int semid)
|
|
{
|
|
struct semid_ds semds;
|
|
struct ipc_perm *ipcp = &semds.sem_perm;
|
|
union semun arg;
|
|
unsigned int i;
|
|
|
|
arg.buf = &semds;
|
|
if (semctl (semid, 0, IPC_STAT, arg) < 0) {
|
|
perror ("semctl ");
|
|
return;
|
|
}
|
|
|
|
bb_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"
|
|
"ctime = %-26.24s\n"
|
|
"%-10s %-10s %-10s %-10s %-10s\n",
|
|
semid,
|
|
ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid,
|
|
ipcp->mode, ipcp->mode & 0777,
|
|
(long) semds.sem_nsems,
|
|
semds.sem_otime ? ctime (&semds.sem_otime) : "Not set",
|
|
ctime (&semds.sem_ctime),
|
|
"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 ");
|
|
bb_fflush_stdout_and_exit (1);
|
|
}
|
|
bb_printf ("%-10d %-10d %-10d %-10d %-10d\n",
|
|
i, val, ncnt, zcnt, pid);
|
|
}
|
|
bb_printf ("\n");
|
|
return;
|
|
}
|
|
|
|
int ipcs_main (int argc, char **argv) {
|
|
int opt, msg = 0, sem = 0, shm = 0, id=0, print=0;
|
|
char format = 0;
|
|
char options[] = "atclupsmqi:ih?";
|
|
|
|
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':
|
|
case '?':
|
|
bb_show_usage();
|
|
bb_fflush_stdout_and_exit (0);
|
|
}
|
|
}
|
|
|
|
if (print) {
|
|
if (shm) {
|
|
print_shm (id);
|
|
bb_fflush_stdout_and_exit (0);
|
|
}
|
|
if (sem) {
|
|
print_sem (id);
|
|
bb_fflush_stdout_and_exit (0);
|
|
}
|
|
if (msg) {
|
|
print_msg (id);
|
|
bb_fflush_stdout_and_exit (0);
|
|
}
|
|
bb_show_usage();
|
|
bb_fflush_stdout_and_exit (0);
|
|
}
|
|
|
|
if ( !shm && !msg && !sem)
|
|
msg = sem = shm = 1;
|
|
bb_printf ("\n");
|
|
|
|
if (shm) {
|
|
do_shm (format);
|
|
bb_printf ("\n");
|
|
}
|
|
if (sem) {
|
|
do_sem (format);
|
|
bb_printf ("\n");
|
|
}
|
|
if (msg) {
|
|
do_msg (format);
|
|
bb_printf ("\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|