[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * ipcs.c -- provides information on allocated ipc resources.
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| 4 | *
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| 5 | * 01 Sept 2004 - Rodney Radford <rradford@mindspring.com>
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| 6 | * Adapted for busybox from util-linux-2.12a.
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| 7 | *
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| 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 9 | */
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| 10 |
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| 11 | /* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
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| 12 | /* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
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| 13 | /* X/OPEN tells us to use <sys/{types,ipc,shm}.h> for shmctl() */
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| 14 | #include <sys/types.h>
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| 15 | #include <sys/ipc.h>
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| 16 | #include <sys/sem.h>
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| 17 | #include <sys/msg.h>
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| 18 | #include <sys/shm.h>
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| 19 |
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| 20 | #include "libbb.h"
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| 21 |
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| 22 | /*-------------------------------------------------------------------*/
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| 23 | /* SHM_DEST and SHM_LOCKED are defined in kernel headers,
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| 24 | but inside #ifdef __KERNEL__ ... #endif */
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| 25 | #ifndef SHM_DEST
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| 26 | /* shm_mode upper byte flags */
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| 27 | #define SHM_DEST 01000 /* segment will be destroyed on last detach */
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| 28 | #define SHM_LOCKED 02000 /* segment will not be swapped */
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| 29 | #endif
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| 30 |
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| 31 | /* For older kernels the same holds for the defines below */
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| 32 | #ifndef MSG_STAT
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| 33 | #define MSG_STAT 11
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| 34 | #define MSG_INFO 12
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| 35 | #endif
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| 36 |
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| 37 | #ifndef SHM_STAT
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| 38 | #define SHM_STAT 13
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| 39 | #define SHM_INFO 14
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| 40 | struct shm_info {
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| 41 | int used_ids;
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| 42 | ulong shm_tot; /* total allocated shm */
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| 43 | ulong shm_rss; /* total resident shm */
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| 44 | ulong shm_swp; /* total swapped shm */
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| 45 | ulong swap_attempts;
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| 46 | ulong swap_successes;
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| 47 | };
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| 48 | #endif
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| 49 |
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| 50 | #ifndef SEM_STAT
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| 51 | #define SEM_STAT 18
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| 52 | #define SEM_INFO 19
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| 53 | #endif
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| 54 |
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| 55 | /* Some versions of libc only define IPC_INFO when __USE_GNU is defined. */
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| 56 | #ifndef IPC_INFO
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| 57 | #define IPC_INFO 3
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| 58 | #endif
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| 59 | /*-------------------------------------------------------------------*/
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| 60 |
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| 61 | /* The last arg of semctl is a union semun, but where is it defined?
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| 62 | X/OPEN tells us to define it ourselves, but until recently
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| 63 | Linux include files would also define it. */
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| 64 | #if defined(__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
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| 65 | /* union semun is defined by including <sys/sem.h> */
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| 66 | #else
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| 67 | /* according to X/OPEN we have to define it ourselves */
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| 68 | union semun {
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| 69 | int val;
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| 70 | struct semid_ds *buf;
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| 71 | unsigned short *array;
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| 72 | struct seminfo *__buf;
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| 73 | };
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| 74 | #endif
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| 75 |
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| 76 | /* X/OPEN (Jan 1987) does not define fields key, seq in struct ipc_perm;
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| 77 | libc 4/5 does not mention struct ipc_term at all, but includes
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| 78 | <linux/ipc.h>, which defines a struct ipc_perm with such fields.
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| 79 | glibc-1.09 has no support for sysv ipc.
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| 80 | glibc 2 uses __key, __seq */
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| 81 | #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
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| 82 | #define KEY __key
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| 83 | #else
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| 84 | #define KEY key
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| 85 | #endif
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| 86 |
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| 87 | #define LIMITS 1
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| 88 | #define STATUS 2
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| 89 | #define CREATOR 3
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| 90 | #define TIME 4
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| 91 | #define PID 5
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| 92 |
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| 93 | static char format;
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| 94 |
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| 95 | static void print_perms(int id, struct ipc_perm *ipcp)
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| 96 | {
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| 97 | struct passwd *pw;
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| 98 | struct group *gr;
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| 99 |
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| 100 | printf("%-10d %-10o", id, ipcp->mode & 0777);
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| 101 |
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| 102 | pw = getpwuid(ipcp->cuid);
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| 103 | if (pw) printf(" %-10s", pw->pw_name);
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| 104 | else printf(" %-10d", ipcp->cuid);
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| 105 | gr = getgrgid(ipcp->cgid);
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| 106 | if (gr) printf(" %-10s", gr->gr_name);
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| 107 | else printf(" %-10d", ipcp->cgid);
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| 108 |
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| 109 | pw = getpwuid(ipcp->uid);
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| 110 | if (pw) printf(" %-10s", pw->pw_name);
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| 111 | else printf(" %-10d", ipcp->uid);
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| 112 | gr = getgrgid(ipcp->gid);
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| 113 | if (gr) printf(" %-10s\n", gr->gr_name);
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| 114 | else printf(" %-10d\n", ipcp->gid);
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| 115 | }
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| 116 |
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| 117 |
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| 118 | static NOINLINE void do_shm(void)
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| 119 | {
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| 120 | int maxid, shmid, id;
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| 121 | struct shmid_ds shmseg;
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| 122 | struct shm_info shm_info;
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| 123 | struct shminfo shminfo;
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| 124 | struct ipc_perm *ipcp = &shmseg.shm_perm;
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| 125 | struct passwd *pw;
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| 126 |
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| 127 | maxid = shmctl(0, SHM_INFO, (struct shmid_ds *) (void *) &shm_info);
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| 128 | if (maxid < 0) {
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| 129 | printf("kernel not configured for %s\n", "shared memory");
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| 130 | return;
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| 131 | }
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| 132 |
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| 133 | switch (format) {
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| 134 | case LIMITS:
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| 135 | printf("------ Shared Memory %s --------\n", "Limits");
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| 136 | if ((shmctl(0, IPC_INFO, (struct shmid_ds *) (void *) &shminfo)) < 0)
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| 137 | return;
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| 138 | /* glibc 2.1.3 and all earlier libc's have ints as fields
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| 139 | of struct shminfo; glibc 2.1.91 has unsigned long; ach */
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| 140 | printf("max number of segments = %lu\n"
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| 141 | "max seg size (kbytes) = %lu\n"
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| 142 | "max total shared memory (pages) = %lu\n"
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| 143 | "min seg size (bytes) = %lu\n",
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| 144 | (unsigned long) shminfo.shmmni,
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| 145 | (unsigned long) (shminfo.shmmax >> 10),
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| 146 | (unsigned long) shminfo.shmall,
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| 147 | (unsigned long) shminfo.shmmin);
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| 148 | return;
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| 149 |
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| 150 | case STATUS:
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| 151 | printf("------ Shared Memory %s --------\n", "Status");
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| 152 | printf( "segments allocated %d\n"
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| 153 | "pages allocated %ld\n"
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| 154 | "pages resident %ld\n"
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| 155 | "pages swapped %ld\n"
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| 156 | "Swap performance: %ld attempts\t%ld successes\n",
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| 157 | shm_info.used_ids,
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| 158 | shm_info.shm_tot,
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| 159 | shm_info.shm_rss,
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| 160 | shm_info.shm_swp,
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| 161 | shm_info.swap_attempts, shm_info.swap_successes);
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| 162 | return;
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| 163 |
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| 164 | case CREATOR:
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| 165 | printf("------ Shared Memory %s --------\n", "Segment Creators/Owners");
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| 166 | printf( "%-10s %-10s %-10s %-10s %-10s %-10s\n",
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| 167 | "shmid", "perms", "cuid", "cgid", "uid", "gid");
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| 168 | break;
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| 169 |
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| 170 | case TIME:
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| 171 | printf("------ Shared Memory %s --------\n", "Attach/Detach/Change Times");
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| 172 | printf( "%-10s %-10s %-20s %-20s %-20s\n",
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| 173 | "shmid", "owner", "attached", "detached", "changed");
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| 174 | break;
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| 175 |
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| 176 | case PID:
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| 177 | printf("------ Shared Memory %s --------\n", "Creator/Last-op");
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| 178 | printf( "%-10s %-10s %-10s %-10s\n",
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| 179 | "shmid", "owner", "cpid", "lpid");
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| 180 | break;
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| 181 |
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| 182 | default:
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| 183 | printf("------ Shared Memory %s --------\n", "Segments");
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| 184 | printf( "%-10s %-10s %-10s %-10s %-10s %-10s %-12s\n",
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| 185 | "key", "shmid", "owner", "perms", "bytes", "nattch",
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| 186 | "status");
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| 187 | break;
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| 188 | }
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| 189 |
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| 190 | for (id = 0; id <= maxid; id++) {
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| 191 | shmid = shmctl(id, SHM_STAT, &shmseg);
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| 192 | if (shmid < 0)
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| 193 | continue;
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| 194 | if (format == CREATOR) {
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| 195 | print_perms(shmid, ipcp);
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| 196 | continue;
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| 197 | }
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| 198 | pw = getpwuid(ipcp->uid);
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| 199 | switch (format) {
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| 200 | case TIME:
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| 201 | if (pw)
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| 202 | printf("%-10d %-10.10s", shmid, pw->pw_name);
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| 203 | else
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| 204 | printf("%-10d %-10d", shmid, ipcp->uid);
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| 205 | /* ctime uses static buffer: use separate calls */
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| 206 | printf(" %-20.16s", shmseg.shm_atime
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| 207 | ? ctime(&shmseg.shm_atime) + 4 : "Not set");
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| 208 | printf(" %-20.16s", shmseg.shm_dtime
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| 209 | ? ctime(&shmseg.shm_dtime) + 4 : "Not set");
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| 210 | printf(" %-20.16s\n", shmseg.shm_ctime
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| 211 | ? ctime(&shmseg.shm_ctime) + 4 : "Not set");
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| 212 | break;
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| 213 | case PID:
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| 214 | if (pw)
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| 215 | printf("%-10d %-10.10s", shmid, pw->pw_name);
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| 216 | else
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| 217 | printf("%-10d %-10d", shmid, ipcp->uid);
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| 218 | printf(" %-10d %-10d\n", shmseg.shm_cpid, shmseg.shm_lpid);
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| 219 | break;
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| 220 |
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| 221 | default:
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| 222 | printf("0x%08x ", ipcp->KEY);
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| 223 | if (pw)
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| 224 | printf("%-10d %-10.10s", shmid, pw->pw_name);
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| 225 | else
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| 226 | printf("%-10d %-10d", shmid, ipcp->uid);
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| 227 | printf(" %-10o %-10lu %-10ld %-6s %-6s\n", ipcp->mode & 0777,
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| 228 | /*
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| 229 | * earlier: int, Austin has size_t
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| 230 | */
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| 231 | (unsigned long) shmseg.shm_segsz,
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| 232 | /*
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| 233 | * glibc-2.1.3 and earlier has unsigned short;
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| 234 | * Austin has shmatt_t
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| 235 | */
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| 236 | (long) shmseg.shm_nattch,
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| 237 | ipcp->mode & SHM_DEST ? "dest" : " ",
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| 238 | ipcp->mode & SHM_LOCKED ? "locked" : " ");
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| 239 | break;
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| 240 | }
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| 241 | }
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| 242 | }
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| 243 |
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| 244 |
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| 245 | static NOINLINE void do_sem(void)
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| 246 | {
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| 247 | int maxid, semid, id;
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| 248 | struct semid_ds semary;
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| 249 | struct seminfo seminfo;
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| 250 | struct ipc_perm *ipcp = &semary.sem_perm;
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| 251 | struct passwd *pw;
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| 252 | union semun arg;
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| 253 |
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| 254 | arg.array = (ushort *) (void *) &seminfo;
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| 255 | maxid = semctl(0, 0, SEM_INFO, arg);
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| 256 | if (maxid < 0) {
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| 257 | printf("kernel not configured for %s\n", "semaphores");
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| 258 | return;
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| 259 | }
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| 260 |
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| 261 | switch (format) {
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| 262 | case LIMITS:
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| 263 | printf("------ Semaphore %s --------\n", "Limits");
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| 264 | arg.array = (ushort *) (void *) &seminfo; /* damn union */
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| 265 | if ((semctl(0, 0, IPC_INFO, arg)) < 0)
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| 266 | return;
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| 267 | printf("max number of arrays = %d\n"
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| 268 | "max semaphores per array = %d\n"
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| 269 | "max semaphores system wide = %d\n"
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| 270 | "max ops per semop call = %d\n"
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| 271 | "semaphore max value = %d\n",
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| 272 | seminfo.semmni,
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| 273 | seminfo.semmsl,
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| 274 | seminfo.semmns, seminfo.semopm, seminfo.semvmx);
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| 275 | return;
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| 276 |
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| 277 | case STATUS:
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| 278 | printf("------ Semaphore %s --------\n", "Status");
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| 279 | printf( "used arrays = %d\n"
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| 280 | "allocated semaphores = %d\n",
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| 281 | seminfo.semusz, seminfo.semaem);
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| 282 | return;
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| 283 |
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| 284 | case CREATOR:
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| 285 | printf("------ Semaphore %s --------\n", "Arrays Creators/Owners");
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| 286 | printf( "%-10s %-10s %-10s %-10s %-10s %-10s\n",
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| 287 | "semid", "perms", "cuid", "cgid", "uid", "gid");
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| 288 | break;
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| 289 |
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| 290 | case TIME:
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| 291 | printf("------ Shared Memory %s --------\n", "Operation/Change Times");
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| 292 | printf( "%-8s %-10s %-26.24s %-26.24s\n",
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| 293 | "shmid", "owner", "last-op", "last-changed");
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| 294 | break;
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| 295 |
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| 296 | case PID:
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| 297 | break;
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| 298 |
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| 299 | default:
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| 300 | printf("------ Semaphore %s --------\n", "Arrays");
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| 301 | printf( "%-10s %-10s %-10s %-10s %-10s\n",
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| 302 | "key", "semid", "owner", "perms", "nsems");
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| 303 | break;
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| 304 | }
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| 305 |
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| 306 | for (id = 0; id <= maxid; id++) {
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| 307 | arg.buf = (struct semid_ds *) &semary;
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| 308 | semid = semctl(id, 0, SEM_STAT, arg);
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| 309 | if (semid < 0)
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| 310 | continue;
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| 311 | if (format == CREATOR) {
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| 312 | print_perms(semid, ipcp);
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| 313 | continue;
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| 314 | }
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| 315 | pw = getpwuid(ipcp->uid);
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| 316 | switch (format) {
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| 317 | case TIME:
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| 318 | if (pw)
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| 319 | printf("%-8d %-10.10s", semid, pw->pw_name);
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| 320 | else
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| 321 | printf("%-8d %-10d", semid, ipcp->uid);
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| 322 | /* ctime uses static buffer: use separate calls */
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| 323 | printf(" %-26.24s", semary.sem_otime
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| 324 | ? ctime(&semary.sem_otime) : "Not set");
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| 325 | printf(" %-26.24s\n", semary.sem_ctime
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| 326 | ? ctime(&semary.sem_ctime) : "Not set");
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| 327 | break;
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| 328 | case PID:
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| 329 | break;
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| 330 |
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| 331 | default:
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| 332 | printf("0x%08x ", ipcp->KEY);
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| 333 | if (pw)
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| 334 | printf("%-10d %-10.9s", semid, pw->pw_name);
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| 335 | else
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| 336 | printf("%-10d %-9d", semid, ipcp->uid);
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| 337 | printf(" %-10o %-10ld\n", ipcp->mode & 0777,
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| 338 | /*
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| 339 | * glibc-2.1.3 and earlier has unsigned short;
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| 340 | * glibc-2.1.91 has variation between
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| 341 | * unsigned short and unsigned long
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| 342 | * Austin prescribes unsigned short.
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| 343 | */
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| 344 | (long) semary.sem_nsems);
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| 345 | break;
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| 346 | }
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| 347 | }
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| 348 | }
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| 349 |
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| 350 |
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| 351 | static NOINLINE void do_msg(void)
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| 352 | {
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| 353 | int maxid, msqid, id;
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| 354 | struct msqid_ds msgque;
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| 355 | struct msginfo msginfo;
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| 356 | struct ipc_perm *ipcp = &msgque.msg_perm;
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| 357 | struct passwd *pw;
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| 358 |
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| 359 | maxid = msgctl(0, MSG_INFO, (struct msqid_ds *) (void *) &msginfo);
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| 360 | if (maxid < 0) {
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| 361 | printf("kernel not configured for %s\n", "message queues");
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| 362 | return;
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| 363 | }
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| 364 |
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| 365 | switch (format) {
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| 366 | case LIMITS:
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| 367 | if ((msgctl(0, IPC_INFO, (struct msqid_ds *) (void *) &msginfo)) < 0)
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| 368 | return;
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| 369 | printf("------ Message%s --------\n", "s: Limits");
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| 370 | printf( "max queues system wide = %d\n"
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| 371 | "max size of message (bytes) = %d\n"
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| 372 | "default max size of queue (bytes) = %d\n",
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| 373 | msginfo.msgmni, msginfo.msgmax, msginfo.msgmnb);
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| 374 | return;
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| 375 |
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| 376 | case STATUS:
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| 377 | printf("------ Message%s --------\n", "s: Status");
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| 378 | printf( "allocated queues = %d\n"
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| 379 | "used headers = %d\n"
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| 380 | "used space = %d bytes\n",
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| 381 | msginfo.msgpool, msginfo.msgmap, msginfo.msgtql);
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| 382 | return;
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| 383 |
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| 384 | case CREATOR:
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| 385 | printf("------ Message%s --------\n", " Queues: Creators/Owners");
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| 386 | printf( "%-10s %-10s %-10s %-10s %-10s %-10s\n",
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| 387 | "msqid", "perms", "cuid", "cgid", "uid", "gid");
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| 388 | break;
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| 389 |
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| 390 | case TIME:
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| 391 | printf("------ Message%s --------\n", " Queues Send/Recv/Change Times");
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| 392 | printf( "%-8s %-10s %-20s %-20s %-20s\n",
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| 393 | "msqid", "owner", "send", "recv", "change");
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| 394 | break;
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| 395 |
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| 396 | case PID:
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| 397 | printf("------ Message%s --------\n", " Queues PIDs");
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| 398 | printf( "%-10s %-10s %-10s %-10s\n",
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| 399 | "msqid", "owner", "lspid", "lrpid");
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| 400 | break;
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| 401 |
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| 402 | default:
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| 403 | printf("------ Message%s --------\n", " Queues");
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| 404 | printf( "%-10s %-10s %-10s %-10s %-12s %-12s\n",
|
---|
| 405 | "key", "msqid", "owner", "perms", "used-bytes", "messages");
|
---|
| 406 | break;
|
---|
| 407 | }
|
---|
| 408 |
|
---|
| 409 | for (id = 0; id <= maxid; id++) {
|
---|
| 410 | msqid = msgctl(id, MSG_STAT, &msgque);
|
---|
| 411 | if (msqid < 0)
|
---|
| 412 | continue;
|
---|
| 413 | if (format == CREATOR) {
|
---|
| 414 | print_perms(msqid, ipcp);
|
---|
| 415 | continue;
|
---|
| 416 | }
|
---|
| 417 | pw = getpwuid(ipcp->uid);
|
---|
| 418 | switch (format) {
|
---|
| 419 | case TIME:
|
---|
| 420 | if (pw)
|
---|
| 421 | printf("%-8d %-10.10s", msqid, pw->pw_name);
|
---|
| 422 | else
|
---|
| 423 | printf("%-8d %-10d", msqid, ipcp->uid);
|
---|
| 424 | printf(" %-20.16s", msgque.msg_stime
|
---|
| 425 | ? ctime(&msgque.msg_stime) + 4 : "Not set");
|
---|
| 426 | printf(" %-20.16s", msgque.msg_rtime
|
---|
| 427 | ? ctime(&msgque.msg_rtime) + 4 : "Not set");
|
---|
| 428 | printf(" %-20.16s\n", msgque.msg_ctime
|
---|
| 429 | ? ctime(&msgque.msg_ctime) + 4 : "Not set");
|
---|
| 430 | break;
|
---|
| 431 | case PID:
|
---|
| 432 | if (pw)
|
---|
| 433 | printf("%-8d %-10.10s", msqid, pw->pw_name);
|
---|
| 434 | else
|
---|
| 435 | printf("%-8d %-10d", msqid, ipcp->uid);
|
---|
| 436 | printf(" %5d %5d\n", msgque.msg_lspid, msgque.msg_lrpid);
|
---|
| 437 | break;
|
---|
| 438 |
|
---|
| 439 | default:
|
---|
| 440 | printf("0x%08x ", ipcp->KEY);
|
---|
| 441 | if (pw)
|
---|
| 442 | printf("%-10d %-10.10s", msqid, pw->pw_name);
|
---|
| 443 | else
|
---|
| 444 | printf("%-10d %-10d", msqid, ipcp->uid);
|
---|
| 445 | printf(" %-10o %-12ld %-12ld\n", ipcp->mode & 0777,
|
---|
| 446 | /*
|
---|
| 447 | * glibc-2.1.3 and earlier has unsigned short;
|
---|
| 448 | * glibc-2.1.91 has variation between
|
---|
| 449 | * unsigned short, unsigned long
|
---|
| 450 | * Austin has msgqnum_t
|
---|
| 451 | */
|
---|
| 452 | (long) msgque.msg_cbytes, (long) msgque.msg_qnum);
|
---|
| 453 | break;
|
---|
| 454 | }
|
---|
| 455 | }
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 |
|
---|
| 459 | static void print_shm(int shmid)
|
---|
| 460 | {
|
---|
| 461 | struct shmid_ds shmds;
|
---|
| 462 | struct ipc_perm *ipcp = &shmds.shm_perm;
|
---|
| 463 |
|
---|
| 464 | if (shmctl(shmid, IPC_STAT, &shmds) == -1) {
|
---|
| 465 | bb_perror_msg("shmctl");
|
---|
| 466 | return;
|
---|
| 467 | }
|
---|
| 468 |
|
---|
| 469 | printf("\nShared memory Segment shmid=%d\n"
|
---|
| 470 | "uid=%d\tgid=%d\tcuid=%d\tcgid=%d\n"
|
---|
| 471 | "mode=%#o\taccess_perms=%#o\n"
|
---|
| 472 | "bytes=%ld\tlpid=%d\tcpid=%d\tnattch=%ld\n",
|
---|
| 473 | shmid,
|
---|
| 474 | ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid,
|
---|
| 475 | ipcp->mode, ipcp->mode & 0777,
|
---|
| 476 | (long) shmds.shm_segsz, shmds.shm_lpid, shmds.shm_cpid,
|
---|
| 477 | (long) shmds.shm_nattch);
|
---|
| 478 | printf("att_time=%-26.24s\n",
|
---|
| 479 | shmds.shm_atime ? ctime(&shmds.shm_atime) : "Not set");
|
---|
| 480 | printf("det_time=%-26.24s\n",
|
---|
| 481 | shmds.shm_dtime ? ctime(&shmds.shm_dtime) : "Not set");
|
---|
| 482 | printf("change_time=%-26.24s\n\n", ctime(&shmds.shm_ctime));
|
---|
| 483 | }
|
---|
| 484 |
|
---|
| 485 |
|
---|
| 486 | static void print_msg(int msqid)
|
---|
| 487 | {
|
---|
| 488 | struct msqid_ds buf;
|
---|
| 489 | struct ipc_perm *ipcp = &buf.msg_perm;
|
---|
| 490 |
|
---|
| 491 | if (msgctl(msqid, IPC_STAT, &buf) == -1) {
|
---|
| 492 | bb_perror_msg("msgctl");
|
---|
| 493 | return;
|
---|
| 494 | }
|
---|
| 495 |
|
---|
| 496 | printf("\nMessage Queue msqid=%d\n"
|
---|
| 497 | "uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n"
|
---|
| 498 | "cbytes=%ld\tqbytes=%ld\tqnum=%ld\tlspid=%d\tlrpid=%d\n",
|
---|
| 499 | msqid, ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid, ipcp->mode,
|
---|
| 500 | /*
|
---|
| 501 | * glibc-2.1.3 and earlier has unsigned short;
|
---|
| 502 | * glibc-2.1.91 has variation between
|
---|
| 503 | * unsigned short, unsigned long
|
---|
| 504 | * Austin has msgqnum_t (for msg_qbytes)
|
---|
| 505 | */
|
---|
| 506 | (long) buf.msg_cbytes, (long) buf.msg_qbytes,
|
---|
| 507 | (long) buf.msg_qnum, buf.msg_lspid, buf.msg_lrpid);
|
---|
| 508 |
|
---|
| 509 | printf("send_time=%-26.24s\n",
|
---|
| 510 | buf.msg_stime ? ctime(&buf.msg_stime) : "Not set");
|
---|
| 511 | printf("rcv_time=%-26.24s\n",
|
---|
| 512 | buf.msg_rtime ? ctime(&buf.msg_rtime) : "Not set");
|
---|
| 513 | printf("change_time=%-26.24s\n\n",
|
---|
| 514 | buf.msg_ctime ? ctime(&buf.msg_ctime) : "Not set");
|
---|
| 515 | }
|
---|
| 516 |
|
---|
| 517 | static void print_sem(int semid)
|
---|
| 518 | {
|
---|
| 519 | struct semid_ds semds;
|
---|
| 520 | struct ipc_perm *ipcp = &semds.sem_perm;
|
---|
| 521 | union semun arg;
|
---|
| 522 | unsigned int i;
|
---|
| 523 |
|
---|
| 524 | arg.buf = &semds;
|
---|
| 525 | if (semctl(semid, 0, IPC_STAT, arg)) {
|
---|
| 526 | bb_perror_msg("semctl");
|
---|
| 527 | return;
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | printf("\nSemaphore Array semid=%d\n"
|
---|
| 531 | "uid=%d\t gid=%d\t cuid=%d\t cgid=%d\n"
|
---|
| 532 | "mode=%#o, access_perms=%#o\n"
|
---|
| 533 | "nsems = %ld\n"
|
---|
| 534 | "otime = %-26.24s\n",
|
---|
| 535 | semid,
|
---|
| 536 | ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid,
|
---|
| 537 | ipcp->mode, ipcp->mode & 0777,
|
---|
| 538 | (long) semds.sem_nsems,
|
---|
| 539 | semds.sem_otime ? ctime(&semds.sem_otime) : "Not set");
|
---|
| 540 | printf("ctime = %-26.24s\n"
|
---|
| 541 | "%-10s %-10s %-10s %-10s %-10s\n",
|
---|
| 542 | ctime(&semds.sem_ctime),
|
---|
| 543 | "semnum", "value", "ncount", "zcount", "pid");
|
---|
| 544 |
|
---|
| 545 | arg.val = 0;
|
---|
| 546 | for (i = 0; i < semds.sem_nsems; i++) {
|
---|
| 547 | int val, ncnt, zcnt, pid;
|
---|
| 548 |
|
---|
| 549 | val = semctl(semid, i, GETVAL, arg);
|
---|
| 550 | ncnt = semctl(semid, i, GETNCNT, arg);
|
---|
| 551 | zcnt = semctl(semid, i, GETZCNT, arg);
|
---|
| 552 | pid = semctl(semid, i, GETPID, arg);
|
---|
| 553 | if (val < 0 || ncnt < 0 || zcnt < 0 || pid < 0) {
|
---|
| 554 | bb_perror_msg_and_die("semctl");
|
---|
| 555 | }
|
---|
| 556 | printf("%-10d %-10d %-10d %-10d %-10d\n", i, val, ncnt, zcnt, pid);
|
---|
| 557 | }
|
---|
| 558 | bb_putchar('\n');
|
---|
| 559 | }
|
---|
| 560 |
|
---|
| 561 | int ipcs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 562 | int ipcs_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 563 | {
|
---|
| 564 | int id = 0;
|
---|
| 565 | unsigned flags = 0;
|
---|
| 566 | unsigned opt;
|
---|
| 567 | char *opt_i;
|
---|
| 568 | #define flag_print (1<<0)
|
---|
| 569 | #define flag_msg (1<<1)
|
---|
| 570 | #define flag_sem (1<<2)
|
---|
| 571 | #define flag_shm (1<<3)
|
---|
| 572 |
|
---|
| 573 | opt = getopt32(argv, "i:aqsmtcplu", &opt_i);
|
---|
| 574 | if (opt & 0x1) { // -i
|
---|
| 575 | id = xatoi(opt_i);
|
---|
| 576 | flags |= flag_print;
|
---|
| 577 | }
|
---|
| 578 | if (opt & 0x2) flags |= flag_msg | flag_sem | flag_shm; // -a
|
---|
| 579 | if (opt & 0x4) flags |= flag_msg; // -q
|
---|
| 580 | if (opt & 0x8) flags |= flag_sem; // -s
|
---|
| 581 | if (opt & 0x10) flags |= flag_shm; // -m
|
---|
| 582 | if (opt & 0x20) format = TIME; // -t
|
---|
| 583 | if (opt & 0x40) format = CREATOR; // -c
|
---|
| 584 | if (opt & 0x80) format = PID; // -p
|
---|
| 585 | if (opt & 0x100) format = LIMITS; // -l
|
---|
| 586 | if (opt & 0x200) format = STATUS; // -u
|
---|
| 587 |
|
---|
| 588 | if (flags & flag_print) {
|
---|
| 589 | if (flags & flag_shm) {
|
---|
| 590 | print_shm(id);
|
---|
| 591 | fflush_stdout_and_exit(EXIT_SUCCESS);
|
---|
| 592 | }
|
---|
| 593 | if (flags & flag_sem) {
|
---|
| 594 | print_sem(id);
|
---|
| 595 | fflush_stdout_and_exit(EXIT_SUCCESS);
|
---|
| 596 | }
|
---|
| 597 | if (flags & flag_msg) {
|
---|
| 598 | print_msg(id);
|
---|
| 599 | fflush_stdout_and_exit(EXIT_SUCCESS);
|
---|
| 600 | }
|
---|
| 601 | bb_show_usage();
|
---|
| 602 | }
|
---|
| 603 |
|
---|
| 604 | if (!(flags & (flag_shm | flag_msg | flag_sem)))
|
---|
| 605 | flags |= flag_msg | flag_shm | flag_sem;
|
---|
| 606 | bb_putchar('\n');
|
---|
| 607 |
|
---|
| 608 | if (flags & flag_shm) {
|
---|
| 609 | do_shm();
|
---|
| 610 | bb_putchar('\n');
|
---|
| 611 | }
|
---|
| 612 | if (flags & flag_sem) {
|
---|
| 613 | do_sem();
|
---|
| 614 | bb_putchar('\n');
|
---|
| 615 | }
|
---|
| 616 | if (flags & flag_msg) {
|
---|
| 617 | do_msg();
|
---|
| 618 | bb_putchar('\n');
|
---|
| 619 | }
|
---|
| 620 | fflush_stdout_and_exit(EXIT_SUCCESS);
|
---|
| 621 | }
|
---|