Bump to version 1.22.1
[platform/upstream/busybox.git] / util-linux / ipcs.c
index 5e58e81..67a25a8 100644 (file)
@@ -5,14 +5,24 @@
  * 01 Sept 2004 - Rodney Radford <rradford@mindspring.com>
  * Adapted for busybox from util-linux-2.12a.
  *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 
-#include "busybox.h"
-#include <errno.h>
-#include <time.h>
-#include <pwd.h>
-#include <grp.h>
+//usage:#define ipcs_trivial_usage
+//usage:       "[[-smq] -i shmid] | [[-asmq] [-tcplu]]"
+//usage:#define ipcs_full_usage "\n\n"
+//usage:       "       -i      Show specific resource"
+//usage:     "\nResource specification:"
+//usage:     "\n       -m      Shared memory segments"
+//usage:     "\n       -q      Message queues"
+//usage:     "\n       -s      Semaphore arrays"
+//usage:     "\n       -a      All (default)"
+//usage:     "\nOutput format:"
+//usage:     "\n       -t      Time"
+//usage:     "\n       -c      Creator"
+//usage:     "\n       -p      Pid"
+//usage:     "\n       -l      Limits"
+//usage:     "\n       -u      Summary"
 
 /* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
 /* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
@@ -23,7 +33,7 @@
 #include <sys/msg.h>
 #include <sys/shm.h>
 
-
+#include "libbb.h"
 
 /*-------------------------------------------------------------------*/
 /* SHM_DEST and SHM_LOCKED are defined in kernel headers,
 #define SHM_INFO        14
 struct shm_info {
        int used_ids;
-       ulong shm_tot;          /* total allocated shm */
-       ulong shm_rss;          /* total resident shm */
-       ulong shm_swp;          /* total swapped shm */
-       ulong swap_attempts;
-       ulong swap_successes;
+       unsigned long shm_tot;          /* total allocated shm */
+       unsigned long shm_rss;          /* total resident shm */
+       unsigned long shm_swp;          /* total swapped shm */
+       unsigned long swap_attempts;
+       unsigned long swap_successes;
 };
 #endif
 
@@ -67,14 +77,14 @@ struct shm_info {
 /* The last arg of semctl is a union semun, but where is it defined?
    X/OPEN tells us to define it ourselves, but until recently
    Linux include files would also define it. */
-#if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
+#if defined(__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
 /* union semun is defined by including <sys/sem.h> */
 #else
 /* according to X/OPEN we have to define it ourselves */
 union semun {
        int val;
        struct semid_ds *buf;
-       unsigned short int *array;
+       unsigned short *array;
        struct seminfo *__buf;
 };
 #endif
@@ -84,7 +94,7 @@ union semun {
    <linux/ipc.h>, which defines a struct ipc_perm with such fields.
    glibc-1.09 has no support for sysv ipc.
    glibc 2 uses __key, __seq */
-#if defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
+#if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
 #define KEY __key
 #else
 #define KEY key
@@ -103,29 +113,25 @@ static void print_perms(int id, struct ipc_perm *ipcp)
        struct passwd *pw;
        struct group *gr;
 
-       bb_printf("%-10d %-10o", id, ipcp->mode & 0777);
-
-       if ((pw = getpwuid(ipcp->cuid)))
-               bb_printf(" %-10s", pw->pw_name);
-       else
-               bb_printf(" %-10d", ipcp->cuid);
-       if ((gr = getgrgid(ipcp->cgid)))
-               bb_printf(" %-10s", gr->gr_name);
-       else
-               bb_printf(" %-10d", ipcp->cgid);
-
-       if ((pw = getpwuid(ipcp->uid)))
-               bb_printf(" %-10s", pw->pw_name);
-       else
-               bb_printf(" %-10d", ipcp->uid);
-       if ((gr = getgrgid(ipcp->gid)))
-               bb_printf(" %-10s\n", gr->gr_name);
-       else
-               bb_printf(" %-10d\n", ipcp->gid);
+       printf("%-10d %-10o", id, ipcp->mode & 0777);
+
+       pw = getpwuid(ipcp->cuid);
+       if (pw) printf(" %-10s", pw->pw_name);
+       else    printf(" %-10d", ipcp->cuid);
+       gr = getgrgid(ipcp->cgid);
+       if (gr) printf(" %-10s", gr->gr_name);
+       else    printf(" %-10d", ipcp->cgid);
+
+       pw = getpwuid(ipcp->uid);
+       if (pw) printf(" %-10s", pw->pw_name);
+       else    printf(" %-10d", ipcp->uid);
+       gr = getgrgid(ipcp->gid);
+       if (gr) printf(" %-10s\n", gr->gr_name);
+       else    printf(" %-10d\n", ipcp->gid);
 }
 
 
-static void do_shm(void)
+static NOINLINE void do_shm(void)
 {
        int maxid, shmid, id;
        struct shmid_ds shmseg;
@@ -136,64 +142,64 @@ static void do_shm(void)
 
        maxid = shmctl(0, SHM_INFO, (struct shmid_ds *) (void *) &shm_info);
        if (maxid < 0) {
-               bb_printf("kernel not configured for %s\n", "shared memory");
+               printf("kernel not configured for %s\n", "shared memory");
                return;
        }
 
        switch (format) {
        case LIMITS:
-               bb_printf("------ Shared Memory %s --------\n", "Limits");
+               printf("------ Shared Memory %s --------\n", "Limits");
                if ((shmctl(0, IPC_INFO, (struct shmid_ds *) (void *) &shminfo)) < 0)
                        return;
                /* glibc 2.1.3 and all earlier libc's have ints as fields
-                  of struct shminfo; glibc 2.1.91 has unsigned long; ach */
-               bb_printf("max number of segments = %lu\n"
-                                 "max seg size (kbytes) = %lu\n"
-                                 "max total shared memory (pages) = %lu\n"
-                                 "min seg size (bytes) = %lu\n",
-                                 (unsigned long) shminfo.shmmni,
-                                 (unsigned long) (shminfo.shmmax >> 10),
-                                 (unsigned long) shminfo.shmall,
-                                 (unsigned long) shminfo.shmmin);
+                * of struct shminfo; glibc 2.1.91 has unsigned long; ach */
+               printf("max number of segments = %lu\n"
+                               "max seg size (kbytes) = %lu\n"
+                               "max total shared memory (pages) = %lu\n"
+                               "min seg size (bytes) = %lu\n",
+                               (unsigned long) shminfo.shmmni,
+                               (unsigned long) (shminfo.shmmax >> 10),
+                               (unsigned long) shminfo.shmall,
+                               (unsigned long) shminfo.shmmin);
                return;
 
        case STATUS:
-               bb_printf("------ Shared Memory %s --------\n", "Status");
-               bb_printf(        "segments allocated %d\n"
-                                 "pages allocated %ld\n"
-                                 "pages resident  %ld\n"
-                                 "pages swapped   %ld\n"
-                                 "Swap performance: %ld attempts\t%ld successes\n",
-                                 shm_info.used_ids,
-                                 shm_info.shm_tot,
-                                 shm_info.shm_rss,
-                                 shm_info.shm_swp,
-                                 shm_info.swap_attempts, shm_info.swap_successes);
+               printf("------ Shared Memory %s --------\n", "Status");
+               printf("segments allocated %d\n"
+                               "pages allocated %lu\n"
+                               "pages resident  %lu\n"
+                               "pages swapped   %lu\n"
+                               "Swap performance: %lu attempts\t%lu successes\n",
+                               shm_info.used_ids,
+                               shm_info.shm_tot,
+                               shm_info.shm_rss,
+                               shm_info.shm_swp,
+                               shm_info.swap_attempts, shm_info.swap_successes);
                return;
 
        case CREATOR:
-               bb_printf("------ Shared Memory %s --------\n", "Segment Creators/Owners");
-               bb_printf(        "%-10s %-10s %-10s %-10s %-10s %-10s\n",
-                                 "shmid", "perms", "cuid", "cgid", "uid", "gid");
+               printf("------ Shared Memory %s --------\n", "Segment Creators/Owners");
+               printf("%-10s %-10s %-10s %-10s %-10s %-10s\n",
+                               "shmid", "perms", "cuid", "cgid", "uid", "gid");
                break;
 
        case TIME:
-               bb_printf("------ Shared Memory %s --------\n", "Attach/Detach/Change Times");
-               bb_printf(        "%-10s %-10s %-20s %-20s %-20s\n",
-                                 "shmid", "owner", "attached", "detached", "changed");
+               printf("------ Shared Memory %s --------\n", "Attach/Detach/Change Times");
+               printf("%-10s %-10s %-20s %-20s %-20s\n",
+                               "shmid", "owner", "attached", "detached", "changed");
                break;
 
        case PID:
-               bb_printf("------ Shared Memory %s --------\n", "Creator/Last-op");
-               bb_printf(        "%-10s %-10s %-10s %-10s\n",
-                                 "shmid", "owner", "cpid", "lpid");
+               printf("------ Shared Memory %s --------\n", "Creator/Last-op");
+               printf("%-10s %-10s %-10s %-10s\n",
+                               "shmid", "owner", "cpid", "lpid");
                break;
 
        default:
-               bb_printf("------ Shared Memory %s --------\n", "Segments");
-               bb_printf(        "%-10s %-10s %-10s %-10s %-10s %-10s %-12s\n",
-                                 "key", "shmid", "owner", "perms", "bytes", "nattch",
-                                 "status");
+               printf("------ Shared Memory %s --------\n", "Segments");
+               printf("%-10s %-10s %-10s %-10s %-10s %-10s %-12s\n",
+                               "key", "shmid", "owner", "perms", "bytes", "nattch",
+                               "status");
                break;
        }
 
@@ -209,50 +215,50 @@ static void do_shm(void)
                switch (format) {
                case TIME:
                        if (pw)
-                               bb_printf("%-10d %-10.10s", shmid, pw->pw_name);
+                               printf("%-10d %-10.10s", shmid, pw->pw_name);
                        else
-                               bb_printf("%-10d %-10d", shmid, ipcp->uid);
+                               printf("%-10d %-10d", shmid, ipcp->uid);
                        /* ctime uses static buffer: use separate calls */
-                       bb_printf(" %-20.16s", shmseg.shm_atime
-                                         ? ctime(&shmseg.shm_atime) + 4 : "Not set");
-                       bb_printf(" %-20.16s", shmseg.shm_dtime
-                                         ? ctime(&shmseg.shm_dtime) + 4 : "Not set");
-                       bb_printf(" %-20.16s\n", shmseg.shm_ctime
-                                         ? ctime(&shmseg.shm_ctime) + 4 : "Not set");
+                       printf(" %-20.16s", shmseg.shm_atime
+                                       ? ctime(&shmseg.shm_atime) + 4 : "Not set");
+                       printf(" %-20.16s", shmseg.shm_dtime
+                                       ? ctime(&shmseg.shm_dtime) + 4 : "Not set");
+                       printf(" %-20.16s\n", shmseg.shm_ctime
+                                       ? ctime(&shmseg.shm_ctime) + 4 : "Not set");
                        break;
                case PID:
                        if (pw)
-                               bb_printf("%-10d %-10.10s", shmid, pw->pw_name);
+                               printf("%-10d %-10.10s", shmid, pw->pw_name);
                        else
-                               bb_printf("%-10d %-10d", shmid, ipcp->uid);
-                       bb_printf(" %-10d %-10d\n", shmseg.shm_cpid, shmseg.shm_lpid);
+                               printf("%-10d %-10d", shmid, ipcp->uid);
+                       printf(" %-10d %-10d\n", shmseg.shm_cpid, shmseg.shm_lpid);
                        break;
 
                default:
-                       bb_printf("0x%08x ", ipcp->KEY);
+                       printf("0x%08x ", ipcp->KEY);
                        if (pw)
-                               bb_printf("%-10d %-10.10s", shmid, pw->pw_name);
+                               printf("%-10d %-10.10s", shmid, pw->pw_name);
                        else
-                               bb_printf("%-10d %-10d", shmid, ipcp->uid);
-                       bb_printf(" %-10o %-10lu %-10ld %-6s %-6s\n", ipcp->mode & 0777,
-                                         /*
-                                          * earlier: int, Austin has size_t
-                                          */
-                                         (unsigned long) shmseg.shm_segsz,
-                                         /*
-                                          * glibc-2.1.3 and earlier has unsigned short;
-                                          * Austin has shmatt_t
-                                          */
-                                         (long) shmseg.shm_nattch,
-                                         ipcp->mode & SHM_DEST ? "dest" : " ",
-                                         ipcp->mode & SHM_LOCKED ? "locked" : " ");
+                               printf("%-10d %-10d", shmid, ipcp->uid);
+                       printf(" %-10o %-10lu %-10ld %-6s %-6s\n", ipcp->mode & 0777,
+                                       /*
+                                        * earlier: int, Austin has size_t
+                                        */
+                                       (unsigned long) shmseg.shm_segsz,
+                                       /*
+                                        * glibc-2.1.3 and earlier has unsigned short;
+                                        * Austin has shmatt_t
+                                        */
+                                       (long) shmseg.shm_nattch,
+                                       ipcp->mode & SHM_DEST ? "dest" : " ",
+                                       ipcp->mode & SHM_LOCKED ? "locked" : " ");
                        break;
                }
        }
 }
 
 
-static void do_sem(void)
+static NOINLINE void do_sem(void)
 {
        int maxid, semid, id;
        struct semid_ds semary;
@@ -261,55 +267,55 @@ static void do_sem(void)
        struct passwd *pw;
        union semun arg;
 
-       arg.array = (ushort *) (void *) &seminfo;
+       arg.array = (unsigned short *) (void *) &seminfo;
        maxid = semctl(0, 0, SEM_INFO, arg);
        if (maxid < 0) {
-               bb_printf("kernel not configured for %s\n", "semaphores");
+               printf("kernel not configured for %s\n", "semaphores");
                return;
        }
 
        switch (format) {
        case LIMITS:
-               bb_printf("------ Semaphore %s --------\n", "Limits");
-               arg.array = (ushort *) (void *) &seminfo;       /* damn union */
+               printf("------ Semaphore %s --------\n", "Limits");
+               arg.array = (unsigned short *) (void *) &seminfo;       /* damn union */
                if ((semctl(0, 0, IPC_INFO, arg)) < 0)
                        return;
-               bb_printf("max number of arrays = %d\n"
-                                 "max semaphores per array = %d\n"
-                                 "max semaphores system wide = %d\n"
-                                 "max ops per semop call = %d\n"
-                                 "semaphore max value = %d\n",
-                                 seminfo.semmni,
-                                 seminfo.semmsl,
-                                 seminfo.semmns, seminfo.semopm, seminfo.semvmx);
+               printf("max number of arrays = %d\n"
+                               "max semaphores per array = %d\n"
+                               "max semaphores system wide = %d\n"
+                               "max ops per semop call = %d\n"
+                               "semaphore max value = %d\n",
+                               seminfo.semmni,
+                               seminfo.semmsl,
+                               seminfo.semmns, seminfo.semopm, seminfo.semvmx);
                return;
 
        case STATUS:
-               bb_printf("------ Semaphore %s --------\n", "Status");
-               bb_printf(        "used arrays = %d\n"
-                                 "allocated semaphores = %d\n",
-                                 seminfo.semusz, seminfo.semaem);
+               printf("------ Semaphore %s --------\n", "Status");
+               printf("used arrays = %d\n"
+                               "allocated semaphores = %d\n",
+                               seminfo.semusz, seminfo.semaem);
                return;
 
        case CREATOR:
-               bb_printf("------ Semaphore %s --------\n", "Arrays Creators/Owners");
-               bb_printf(        "%-10s %-10s %-10s %-10s %-10s %-10s\n",
-                                 "semid", "perms", "cuid", "cgid", "uid", "gid");
+               printf("------ Semaphore %s --------\n", "Arrays Creators/Owners");
+               printf("%-10s %-10s %-10s %-10s %-10s %-10s\n",
+                               "semid", "perms", "cuid", "cgid", "uid", "gid");
                break;
 
        case TIME:
-               bb_printf("------ Shared Memory %s --------\n", "Operation/Change Times");
-               bb_printf(        "%-8s %-10s %-26.24s %-26.24s\n",
-                                 "shmid", "owner", "last-op", "last-changed");
+               printf("------ Shared Memory %s --------\n", "Operation/Change Times");
+               printf("%-8s %-10s %-26.24s %-26.24s\n",
+                               "shmid", "owner", "last-op", "last-changed");
                break;
 
        case PID:
                break;
 
        default:
-               bb_printf("------ Semaphore %s --------\n", "Arrays");
-               bb_printf(        "%-10s %-10s %-10s %-10s %-10s\n",
-                                 "key", "semid", "owner", "perms", "nsems");
+               printf("------ Semaphore %s --------\n", "Arrays");
+               printf("%-10s %-10s %-10s %-10s %-10s\n",
+                               "key", "semid", "owner", "perms", "nsems");
                break;
        }
 
@@ -326,39 +332,39 @@ static void do_sem(void)
                switch (format) {
                case TIME:
                        if (pw)
-                               bb_printf("%-8d %-10.10s", semid, pw->pw_name);
+                               printf("%-8d %-10.10s", semid, pw->pw_name);
                        else
-                               bb_printf("%-8d %-10d", semid, ipcp->uid);
+                               printf("%-8d %-10d", semid, ipcp->uid);
                        /* ctime uses static buffer: use separate calls */
-                       bb_printf("  %-26.24s", semary.sem_otime
-                                         ? ctime(&semary.sem_otime) : "Not set");
-                       bb_printf(" %-26.24s\n", semary.sem_ctime
-                                         ? ctime(&semary.sem_ctime) : "Not set");
+                       printf("  %-26.24s", semary.sem_otime
+                                       ? ctime(&semary.sem_otime) : "Not set");
+                       printf(" %-26.24s\n", semary.sem_ctime
+                                       ? ctime(&semary.sem_ctime) : "Not set");
                        break;
                case PID:
                        break;
 
                default:
-                       bb_printf("0x%08x ", ipcp->KEY);
+                       printf("0x%08x ", ipcp->KEY);
                        if (pw)
-                               bb_printf("%-10d %-10.9s", semid, pw->pw_name);
+                               printf("%-10d %-10.9s", semid, pw->pw_name);
                        else
-                               bb_printf("%-10d %-9d", semid, ipcp->uid);
-                       bb_printf(" %-10o %-10ld\n", ipcp->mode & 0777,
-                                         /*
-                                          * glibc-2.1.3 and earlier has unsigned short;
-                                          * glibc-2.1.91 has variation between
-                                          * unsigned short and unsigned long
-                                          * Austin prescribes unsigned short.
-                                          */
-                                         (long) semary.sem_nsems);
+                               printf("%-10d %-9d", semid, ipcp->uid);
+                       printf(" %-10o %-10ld\n", ipcp->mode & 0777,
+                                       /*
+                                        * glibc-2.1.3 and earlier has unsigned short;
+                                        * glibc-2.1.91 has variation between
+                                        * unsigned short and unsigned long
+                                        * Austin prescribes unsigned short.
+                                        */
+                                       (long) semary.sem_nsems);
                        break;
                }
        }
 }
 
 
-static void do_msg(void)
+static NOINLINE void do_msg(void)
 {
        int maxid, msqid, id;
        struct msqid_ds msgque;
@@ -368,7 +374,7 @@ static void do_msg(void)
 
        maxid = msgctl(0, MSG_INFO, (struct msqid_ds *) (void *) &msginfo);
        if (maxid < 0) {
-               bb_printf("kernel not configured for %s\n", "message queues");
+               printf("kernel not configured for %s\n", "message queues");
                return;
        }
 
@@ -376,43 +382,43 @@ static void do_msg(void)
        case LIMITS:
                if ((msgctl(0, IPC_INFO, (struct msqid_ds *) (void *) &msginfo)) < 0)
                        return;
-               bb_printf("------ Message%s --------\n", "s: Limits");
-               bb_printf(        "max queues system wide = %d\n"
-                                 "max size of message (bytes) = %d\n"
-                                 "default max size of queue (bytes) = %d\n",
-                                 msginfo.msgmni, msginfo.msgmax, msginfo.msgmnb);
+               printf("------ Message%s --------\n", "s: Limits");
+               printf("max queues system wide = %d\n"
+                               "max size of message (bytes) = %d\n"
+                               "default max size of queue (bytes) = %d\n",
+                               msginfo.msgmni, msginfo.msgmax, msginfo.msgmnb);
                return;
 
        case STATUS:
-               bb_printf("------ Message%s --------\n", "s: Status");
-               bb_printf(        "allocated queues = %d\n"
-                                 "used headers = %d\n"
-                                 "used space = %d bytes\n",
-                                 msginfo.msgpool, msginfo.msgmap, msginfo.msgtql);
+               printf("------ Message%s --------\n", "s: Status");
+               printf("allocated queues = %d\n"
+                               "used headers = %d\n"
+                               "used space = %d bytes\n",
+                               msginfo.msgpool, msginfo.msgmap, msginfo.msgtql);
                return;
 
        case CREATOR:
-               bb_printf("------ Message%s --------\n", " Queues: Creators/Owners");
-               bb_printf(        "%-10s %-10s %-10s %-10s %-10s %-10s\n",
-                                 "msqid", "perms", "cuid", "cgid", "uid", "gid");
+               printf("------ Message%s --------\n", " Queues: Creators/Owners");
+               printf("%-10s %-10s %-10s %-10s %-10s %-10s\n",
+                               "msqid", "perms", "cuid", "cgid", "uid", "gid");
                break;
 
        case TIME:
-               bb_printf("------ Message%s --------\n", " Queues Send/Recv/Change Times");
-               bb_printf(        "%-8s %-10s %-20s %-20s %-20s\n",
-                                 "msqid", "owner", "send", "recv", "change");
+               printf("------ Message%s --------\n", " Queues Send/Recv/Change Times");
+               printf("%-8s %-10s %-20s %-20s %-20s\n",
+                               "msqid", "owner", "send", "recv", "change");
                break;
 
        case PID:
-               bb_printf("------ Message%s --------\n", " Queues PIDs");
-               bb_printf(        "%-10s %-10s %-10s %-10s\n",
-                                 "msqid", "owner", "lspid", "lrpid");
+               printf("------ Message%s --------\n", " Queues PIDs");
+               printf("%-10s %-10s %-10s %-10s\n",
+                               "msqid", "owner", "lspid", "lrpid");
                break;
 
        default:
-               bb_printf("------ Message%s --------\n", " Queues");
-               bb_printf(        "%-10s %-10s %-10s %-10s %-12s %-12s\n",
-                                 "key", "msqid", "owner", "perms", "used-bytes", "messages");
+               printf("------ Message%s --------\n", " Queues");
+               printf("%-10s %-10s %-10s %-10s %-12s %-12s\n",
+                               "key", "msqid", "owner", "perms", "used-bytes", "messages");
                break;
        }
 
@@ -428,38 +434,38 @@ static void do_msg(void)
                switch (format) {
                case TIME:
                        if (pw)
-                               bb_printf("%-8d %-10.10s", msqid, pw->pw_name);
+                               printf("%-8d %-10.10s", msqid, pw->pw_name);
                        else
-                               bb_printf("%-8d %-10d", msqid, ipcp->uid);
-                       bb_printf(" %-20.16s", msgque.msg_stime
-                                         ? ctime(&msgque.msg_stime) + 4 : "Not set");
-                       bb_printf(" %-20.16s", msgque.msg_rtime
-                                         ? ctime(&msgque.msg_rtime) + 4 : "Not set");
-                       bb_printf(" %-20.16s\n", msgque.msg_ctime
-                                         ? ctime(&msgque.msg_ctime) + 4 : "Not set");
+                               printf("%-8d %-10d", msqid, ipcp->uid);
+                       printf(" %-20.16s", msgque.msg_stime
+                                       ? ctime(&msgque.msg_stime) + 4 : "Not set");
+                       printf(" %-20.16s", msgque.msg_rtime
+                                       ? ctime(&msgque.msg_rtime) + 4 : "Not set");
+                       printf(" %-20.16s\n", msgque.msg_ctime
+                                       ? ctime(&msgque.msg_ctime) + 4 : "Not set");
                        break;
                case PID:
                        if (pw)
-                               bb_printf("%-8d %-10.10s", msqid, pw->pw_name);
+                               printf("%-8d %-10.10s", msqid, pw->pw_name);
                        else
-                               bb_printf("%-8d %-10d", msqid, ipcp->uid);
-                       bb_printf("  %5d     %5d\n", msgque.msg_lspid, msgque.msg_lrpid);
+                               printf("%-8d %-10d", msqid, ipcp->uid);
+                       printf("  %5d     %5d\n", msgque.msg_lspid, msgque.msg_lrpid);
                        break;
 
                default:
-                       bb_printf("0x%08x ", ipcp->KEY);
+                       printf("0x%08x ", ipcp->KEY);
                        if (pw)
-                               bb_printf("%-10d %-10.10s", msqid, pw->pw_name);
+                               printf("%-10d %-10.10s", msqid, pw->pw_name);
                        else
-                               bb_printf("%-10d %-10d", msqid, ipcp->uid);
-                       bb_printf(" %-10o %-12ld %-12ld\n", ipcp->mode & 0777,
-                                         /*
-                                          * glibc-2.1.3 and earlier has unsigned short;
-                                          * glibc-2.1.91 has variation between
-                                          * unsigned short, unsigned long
-                                          * Austin has msgqnum_t
-                                          */
-                                         (long) msgque.msg_cbytes, (long) msgque.msg_qnum);
+                               printf("%-10d %-10d", msqid, ipcp->uid);
+                       printf(" %-10o %-12ld %-12ld\n", ipcp->mode & 0777,
+                                       /*
+                                        * glibc-2.1.3 and earlier has unsigned short;
+                                        * glibc-2.1.91 has variation between
+                                        * unsigned short, unsigned long
+                                        * Austin has msgqnum_t
+                                        */
+                                       (long) msgque.msg_cbytes, (long) msgque.msg_qnum);
                        break;
                }
        }
@@ -476,20 +482,20 @@ static void print_shm(int shmid)
                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",
-                         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);
-       bb_printf("att_time=%-26.24s\n",
-                         shmds.shm_atime ? ctime(&shmds.shm_atime) : "Not set");
-       bb_printf("det_time=%-26.24s\n",
-                         shmds.shm_dtime ? ctime(&shmds.shm_dtime) : "Not set");
-       bb_printf("change_time=%-26.24s\n\n", ctime(&shmds.shm_ctime));
+       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",
+                       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);
+       printf("att_time=%-26.24s\n",
+                       shmds.shm_atime ? ctime(&shmds.shm_atime) : "Not set");
+       printf("det_time=%-26.24s\n",
+                       shmds.shm_dtime ? ctime(&shmds.shm_dtime) : "Not set");
+       printf("change_time=%-26.24s\n\n", ctime(&shmds.shm_ctime));
 }
 
 
@@ -503,25 +509,25 @@ static void print_msg(int msqid)
                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",
-                         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);
-
-       bb_printf("send_time=%-26.24s\n",
-                         buf.msg_stime ? ctime(&buf.msg_stime) : "Not set");
-       bb_printf("rcv_time=%-26.24s\n",
-                         buf.msg_rtime ? ctime(&buf.msg_rtime) : "Not set");
-       bb_printf("change_time=%-26.24s\n\n",
-                         buf.msg_ctime ? ctime(&buf.msg_ctime) : "Not set");
+       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",
+                       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);
+
+       printf("send_time=%-26.24s\n",
+                       buf.msg_stime ? ctime(&buf.msg_stime) : "Not set");
+       printf("rcv_time=%-26.24s\n",
+                       buf.msg_rtime ? ctime(&buf.msg_rtime) : "Not set");
+       printf("change_time=%-26.24s\n\n",
+                       buf.msg_ctime ? ctime(&buf.msg_ctime) : "Not set");
 }
 
 static void print_sem(int semid)
@@ -537,20 +543,20 @@ static void print_sem(int semid)
                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",
-                         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");
-       bb_printf("ctime = %-26.24s\n"
-                         "%-10s %-10s %-10s %-10s %-10s\n",
-                         ctime(&semds.sem_ctime),
-                         "semnum", "value", "ncount", "zcount", "pid");
+       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",
+                       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");
+       printf("ctime = %-26.24s\n"
+                       "%-10s %-10s %-10s %-10s %-10s\n",
+                       ctime(&semds.sem_ctime),
+                       "semnum", "value", "ncount", "zcount", "pid");
 
        arg.val = 0;
        for (i = 0; i < semds.sem_nsems; i++) {
@@ -563,12 +569,13 @@ static void print_sem(int semid)
                if (val < 0 || ncnt < 0 || zcnt < 0 || pid < 0) {
                        bb_perror_msg_and_die("semctl");
                }
-               bb_printf("%-10d %-10d %-10d %-10d %-10d\n", i, val, ncnt, zcnt, pid);
+               printf("%-10u %-10d %-10d %-10d %-10d\n", i, val, ncnt, zcnt, pid);
        }
-       bb_printf("\n");
+       bb_putchar('\n');
 }
 
-int ipcs_main(int argc, char **argv)
+int ipcs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ipcs_main(int argc UNUSED_PARAM, char **argv)
 {
        int id = 0;
        unsigned flags = 0;
@@ -579,9 +586,9 @@ int ipcs_main(int argc, char **argv)
 #define flag_sem       (1<<2)
 #define flag_shm       (1<<3)
 
-       opt = getopt32(argc, argv, "i:aqsmtcplu", &opt_i);
+       opt = getopt32(argv, "i:aqsmtcplu", &opt_i);
        if (opt & 0x1) { // -i
-               id = atoi(opt_i);
+               id = xatoi(opt_i);
                flags |= flag_print;
        }
        if (opt & 0x2) flags |= flag_msg | flag_sem | flag_shm; // -a
@@ -597,34 +604,34 @@ int ipcs_main(int argc, char **argv)
        if (flags & flag_print) {
                if (flags & flag_shm) {
                        print_shm(id);
-                       bb_fflush_stdout_and_exit(0);
+                       fflush_stdout_and_exit(EXIT_SUCCESS);
                }
                if (flags & flag_sem) {
                        print_sem(id);
-                       bb_fflush_stdout_and_exit(0);
+                       fflush_stdout_and_exit(EXIT_SUCCESS);
                }
                if (flags & flag_msg) {
                        print_msg(id);
-                       bb_fflush_stdout_and_exit(0);
+                       fflush_stdout_and_exit(EXIT_SUCCESS);
                }
                bb_show_usage();
        }
 
        if (!(flags & (flag_shm | flag_msg | flag_sem)))
                flags |= flag_msg | flag_shm | flag_sem;
-       bb_printf("\n");
+       bb_putchar('\n');
 
        if (flags & flag_shm) {
                do_shm();
-               bb_printf("\n");
+               bb_putchar('\n');
        }
        if (flags & flag_sem) {
                do_sem();
-               bb_printf("\n");
+               bb_putchar('\n');
        }
        if (flags & flag_msg) {
                do_msg();
-               bb_printf("\n");
+               bb_putchar('\n');
        }
-       return EXIT_SUCCESS;
+       fflush_stdout_and_exit(EXIT_SUCCESS);
 }