From 14c8ef42870ca9623b44e369c0231766e8371bfd Mon Sep 17 00:00:00 2001 From: Ashwini Sharma Date: Mon, 25 Aug 2014 22:01:11 -0500 Subject: ipcs : display all the IPC fascilities information crond : CRON scheduler --- toys/pending/ipcs.c | 450 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 450 insertions(+) create mode 100644 toys/pending/ipcs.c (limited to 'toys/pending/ipcs.c') diff --git a/toys/pending/ipcs.c b/toys/pending/ipcs.c new file mode 100644 index 00000000..d974a519 --- /dev/null +++ b/toys/pending/ipcs.c @@ -0,0 +1,450 @@ +/* ipcs.c - provide information on ipc facilities + * + * Copyright 2014 Sandeep Sharma + * + * see http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ipcs.html + +USE_IPCS(NEWTOY(ipcs, "acptulsqmi#", TOYFLAG_USR|TOYFLAG_BIN)) + +config IPCS + bool "ipcs" + default n + help + usage: ipcs [[-smq] -i shmid] | [[-asmq] [-tcplu]] + + -i Show specific resource + Resource specification: + -a All (default) + -m Shared memory segments + -q Message queues + -s Semaphore arrays + Output format: + -c Creator + -l Limits + -p Pid + -t Time + -u Summary +*/ + +#define FOR_ipcs +#include "toys.h" +#include +#include +#include +#include + +GLOBALS( + int id; +) + +//used many times, so good to paste it +#define flag(x) (toys.optflags & FLAG_ ## x) + +union semun { //man says declare it yourself + int val; + struct semid_ds *buf; + unsigned short *array; + struct seminfo *__buf; +}; + +static void show_msg_id(void) +{ + struct msqid_ds buf; + int ret; + + if ((ret = msgctl(TT.id, IPC_STAT, &buf)) < 0) { + perror_msg("msgctl"); + return; + } + +#define ipcperm buf.msg_perm + + printf("\nMessage Queue msqid=%d\n" + "uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n", + TT.id, ipcperm.uid, ipcperm.gid, ipcperm.cuid, ipcperm.cgid,ipcperm.mode); + printf ("cbytes=%ld\tqbytes=%ld\tqnum=%ld\tlspid=%d\tlrpid=%d\n", + (long) buf.msg_cbytes, (long) buf.msg_qbytes, + (long) buf.msg_qnum, buf.msg_lspid, buf.msg_lrpid); + + printf("send_time=%-26.24s\nrcv_time=%-26.24s\nchange_time=%-26.24s\n\n", + 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"); +#undef ipcperm +} + +static void show_sem_id(void) +{ + struct semid_ds buf; + union semun n; + int ret, i; + + n.buf = &buf; + if ((ret = semctl(TT.id, 0, IPC_STAT, n)) < 0) { + perror_msg("semctl"); + return; + } + +#define ipcperm buf.sem_perm + 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", + TT.id, + ipcperm.uid, ipcperm.gid, ipcperm.cuid, ipcperm.cgid, + ipcperm.mode, ipcperm.mode & 0777, + (long) buf.sem_nsems, + buf.sem_otime ? ctime(&buf.sem_otime) : "Not set"); + printf("ctime = %-26.24s\n" + "%-10s %-10s %-10s %-10s %-10s\n", + ctime(&buf.sem_ctime), + "semnum", "value", "ncount", "zcount", "pid"); +#undef ipcperm + + for (i = 0; i < buf.sem_nsems; i++) { + int val, nc, zc, pid; + val = semctl(TT.id, i, GETVAL, n); + nc = semctl(TT.id, i, GETNCNT, n); + zc = semctl(TT.id, i, GETZCNT, n); + pid = semctl(TT.id, i, GETPID, n); + if (val < 0 || nc < 0 || zc < 0 || pid < 0) + perror_exit("semctl"); + printf("%-10d %-10d %-10d %-10d %-10d\n", i, val, nc, zc, pid); + } + xputc('\n'); +} + +static void show_shm_id(void) +{ + struct shmid_ds buf; + int ret; + + if ((ret = shmctl(TT.id, IPC_STAT, &buf)) < 0) { + perror_msg("shmctl"); + return; + } + +#define ipcperm buf.shm_perm + + 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", + TT.id, + ipcperm.uid, ipcperm.gid, ipcperm.cuid, ipcperm.cgid, + ipcperm.mode, (ipcperm.mode & 0777), + (long) buf.shm_segsz, buf.shm_lpid, buf.shm_cpid, + (long) buf.shm_nattch); + printf("att_time=%-26.24s\n", + buf.shm_atime ? ctime(&buf.shm_atime) : "Not set"); + printf("det_time=%-26.24s\n", + buf.shm_dtime ? ctime(&buf.shm_dtime) : "Not set"); + printf("change_time=%-26.24s\n\n", ctime(&buf.shm_ctime)); +#undef ipcperm +} + +static void shm_array(void) +{ + struct shm_info shm_buf; + struct shminfo ipc_buf; + struct shmid_ds buf; + int max_nr, i, shmid; + struct passwd *pw; + struct group *gr; + + if ((max_nr = shmctl(0, SHM_INFO, (struct shmid_ds*)&shm_buf)) < 0) { + perror_msg("kernel not configured for shared memory"); + return; + } + + if (flag(u)) { + printf("------ Shared Memory Status --------\n"); + 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_buf.used_ids, + shm_buf.shm_tot, + shm_buf.shm_rss, + shm_buf.shm_swp, + shm_buf.swap_attempts, shm_buf.swap_successes); + return; + } + if (flag(l)) { + if ((shmctl(0, 3, (struct shmid_ds*)&ipc_buf)) < 0) return; //IPC_INFO + printf("------ Shared Memory Limits --------\n"); + 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) ipc_buf.shmmni, + (unsigned long) (ipc_buf.shmmax >> 10), + (unsigned long) ipc_buf.shmall, + (unsigned long) ipc_buf.shmmin); + return; + } + + if (flag(t)) { + printf("------ Shared Memory Attach/Detach/Change Times --------\n"); + printf("%-10s %-10s %-20s %-20s %-20s\n", + "shmid", "owner", "attached", "detached", "changed"); + } else if (flag(p)) { + printf("------ Shared Memory Creator/Last-op --------\n"); + printf("%-10s %-10s %-10s %-10s\n", + "shmid", "owner", "cpid", "lpid"); + } else if (flag(c)) { + printf("------ Shared Memory Segment Creators/Owners --------\n"); + printf("%-10s %-10s %-10s %-10s %-10s %-10s\n", + "shmid", "perms", "cuid", "cgid", "uid", "gid"); + } else { + printf("------ Shared Memory Segments --------\n"); + printf("%-10s %-10s %-10s %-10s %-10s %-10s %-12s\n", + "key", "shmid", "owner", "perms", "bytes", "nattch", + "status"); + } + + for (i = 0; i <= max_nr; i++) { + if ((shmid = shmctl(i, SHM_STAT, &buf)) < 0 ) continue; + if (flag(t)) { + if ((pw = getpwuid(buf.shm_perm.uid))) + printf("%-10d %-10.10s", shmid, pw->pw_name); + else printf("%-10d %-10.10d", shmid, buf.shm_perm.uid); + printf(" %-20.16s", buf.shm_atime + ? ctime(&buf.shm_atime) + 4 : "Not set"); + printf(" %-20.16s", buf.shm_dtime + ? ctime(&buf.shm_dtime) + 4 : "Not set"); + printf(" %-20.16s\n", buf.shm_ctime + ? ctime(&buf.shm_ctime) + 4 : "Not set"); + } else if (flag(p)) { + if ((pw = getpwuid(buf.shm_perm.uid))) + printf("%-10d %-10.10s", shmid, pw->pw_name); + else printf("%-10d %-10.10d", shmid, buf.shm_perm.uid); + printf(" %-10d %-10d\n", buf.shm_cpid, buf.shm_lpid); + } else if (flag(c)) { + printf("%-10d %-10o", shmid, buf.shm_perm.mode & 0777); + if ((pw = getpwuid(buf.shm_perm.cuid))) printf(" %-10s", pw->pw_name); + else printf(" %-10d", buf.shm_perm.cuid); + if ((gr = getgrgid(buf.shm_perm.cgid))) printf(" %-10s", gr->gr_name); + else printf(" %-10d", buf.shm_perm.cgid); + if ((pw = getpwuid(buf.shm_perm.uid))) printf(" %-10s", pw->pw_name); + else printf(" %-10d", buf.shm_perm.uid); + if ((gr = getgrgid(buf.shm_perm.gid))) printf(" %-10s\n", gr->gr_name); + else printf(" %-10d\n", buf.shm_perm.gid); + } else { + printf("0x%08x ", buf.shm_perm.__key); + if ((pw = getpwuid(buf.shm_perm.uid))) + printf("%-10d %-10.10s", shmid, pw->pw_name); + else printf("%-10d %-10.10d", shmid, buf.shm_perm.uid); + printf(" %-10o %-10lu %-10ld %-6s %-6s\n", buf.shm_perm.mode & 0777, + (unsigned long) buf.shm_segsz, + (long) buf.shm_nattch, + buf.shm_perm.mode & SHM_DEST ? "dest" : " ", + buf.shm_perm.mode & SHM_LOCKED ? "locked" : " "); + } + } +} + +static void sem_array(void) +{ + struct seminfo info_buf; + struct semid_ds buf; + union semun u; + int max_nr, i,semid; + struct passwd *pw; + struct group *gr; + + u.array = (unsigned short *)&info_buf; + if ((max_nr = semctl(0, 0, SEM_INFO, u)) < 0) { + perror_msg("kernel is not configured for semaphores"); + return; + } + + + if (flag(u)) { + printf("------ Semaphore Status --------\n"); + printf("used arrays = %d\n" + "allocated semaphores = %d\n", + info_buf.semusz, info_buf.semaem); + return; + } + if (flag(l)) { + printf("------ Semaphore Limits --------\n"); + u.array = (unsigned short *)&info_buf; + if ((semctl(0, 0, 3, u)) < 0) //IPC_INFO + return; + 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", + info_buf.semmni, + info_buf.semmsl, + info_buf.semmns, info_buf.semopm, info_buf.semvmx); + return; + } + + if (flag(t)) { + printf("------ Semaphore Operation/Change Times --------\n"); + printf("%-8s %-10s %-26.24s %-26.24s\n", + "shmid", "owner", "last-op", "last-changed"); + } else if (flag(c)) { + printf("------ Semaphore %s --------\n", "Arrays Creators/Owners"); + printf("%-10s %-10s %-10s %-10s %-10s %-10s\n", + "semid", "perms", "cuid", "cgid", "uid", "gid"); + + } else if (flag(p)){ + return; + } else { + printf("------ Semaphore %s --------\n", "Arrays"); + printf("%-10s %-10s %-10s %-10s %-10s\n", + "key", "semid", "owner", "perms", "nsems"); + } + + for (i = 0; i <= max_nr; i++) { + u.buf = &buf; + if ((semid = semctl(i, 0, SEM_STAT, u)) < 0) continue; + pw = getpwuid(buf.sem_perm.uid); + if (flag(t)) { + if (pw) printf("%-8d %-10.10s", semid, pw->pw_name); + else printf("%-8d %-10d", semid, buf.sem_perm.uid); + + printf(" %-26.24s", buf.sem_otime + ? ctime(&buf.sem_otime) : "Not set"); + printf(" %-26.24s\n", buf.sem_ctime + ? ctime(&buf.sem_ctime) : "Not set"); + } else if (flag(c)) { + printf("%-10d %-10o", semid, buf.sem_perm.mode & 0777); + if ((pw = getpwuid(buf.sem_perm.cuid))) printf(" %-10s", pw->pw_name); + else printf(" %-10d", buf.sem_perm.cuid); + if ((gr = getgrgid(buf.sem_perm.cgid))) printf(" %-10s", gr->gr_name); + else printf(" %-10d", buf.sem_perm.cgid); + if ((pw = getpwuid(buf.sem_perm.uid))) printf(" %-10s", pw->pw_name); + else printf(" %-10d", buf.sem_perm.uid); + if ((gr = getgrgid(buf.sem_perm.gid))) printf(" %-10s\n", gr->gr_name); + else printf(" %-10d\n", buf.sem_perm.gid); + } else { + printf("0x%08x ", buf.sem_perm.__key); + if (pw) printf("%-10d %-10.9s", semid, pw->pw_name); + else printf("%-10d %-9d", semid, buf.sem_perm.uid); + printf(" %-10o %-10ld\n", buf.sem_perm.mode & 0777, + (long) buf.sem_nsems); + } + } +} + +static void msg_array(void) +{ + struct msginfo info_buf; + struct msqid_ds buf; + int max_nr, i, msqid; + struct passwd *pw; + struct group *gr; + + if ((max_nr = msgctl(0, MSG_INFO, (struct msqid_ds*)&info_buf)) < 0) { + perror_msg("kernel not configured for message queue"); + return; + } + + if (flag(u)) { + printf("------ Message%s --------\n", "s: Status"); + printf("allocated queues = %d\n" + "used headers = %d\n" + "used space = %d bytes\n", + info_buf.msgpool, info_buf.msgmap, info_buf.msgtql); + return; + } + if (flag(l)) { + if ((msgctl(0, 3, (struct msqid_ds*)&info_buf)) < 0) return; //IPC_INFO + printf("------ Messages: Limits --------\n"); + printf("max queues system wide = %d\n" + "max size of message (bytes) = %d\n" + "default max size of queue (bytes) = %d\n", + info_buf.msgmni, info_buf.msgmax, info_buf.msgmnb); + return; + } + + if (flag(t)) { + printf("------ Message%s --------\n", " Queues Send/Recv/Change Times"); + printf("%-8s %-10s %-20s %-20s %-20s\n", + "msqid", "owner", "send", "recv", "change"); + } else if (flag(p)) { + printf("------ Message%s --------\n", " Queues PIDs"); + printf("%-10s %-10s %-10s %-10s\n", + "msqid", "owner", "lspid", "lrpid"); + } else if (flag(c)) { + printf("------ Message%s --------\n", " Queues: Creators/Owners"); + printf("%-10s %-10s %-10s %-10s %-10s %-10s\n", + "msqid", "perms", "cuid", "cgid", "uid", "gid"); + } else { + printf("------ Message%s --------\n", " Queues"); + printf("%-10s %-10s %-10s %-10s %-12s %-12s\n", + "key", "msqid", "owner", "perms", "used-bytes", "messages"); + } + + for (i = 0; i <= max_nr; i++) { + if ((msqid = msgctl(i, MSG_STAT, &buf)) < 0 ) continue; + pw = getpwuid(buf.msg_perm.uid); + if (flag(t)) { + if (pw) printf("%-8d %-10.10s", msqid, pw->pw_name); + else printf("%-8d %-10d", msqid, buf.msg_perm.uid); + printf(" %-20.16s", buf.msg_stime + ? ctime(&buf.msg_stime) + 4 : "Not set"); + printf(" %-20.16s", buf.msg_rtime + ? ctime(&buf.msg_rtime) + 4 : "Not set"); + printf(" %-20.16s\n", buf.msg_ctime + ? ctime(&buf.msg_ctime) + 4 : "Not set"); + } else if (flag(p)) { + if (pw) printf("%-8d %-10.10s", msqid, pw->pw_name); + else printf("%-8d %-10d", msqid, buf.msg_perm.uid); + printf(" %5d %5d\n", buf.msg_lspid, buf.msg_lrpid); + } else if (flag(c)) { + printf("%-10d %-10o", msqid, buf.msg_perm.mode & 0777); + if ((pw = getpwuid(buf.msg_perm.cuid))) printf(" %-10s", pw->pw_name); + else printf(" %-10d", buf.msg_perm.cuid); + if ((gr = getgrgid(buf.msg_perm.cgid))) printf(" %-10s", gr->gr_name); + else printf(" %-10d", buf.msg_perm.cgid); + if ((pw = getpwuid(buf.msg_perm.uid))) printf(" %-10s", pw->pw_name); + else printf(" %-10d", buf.msg_perm.uid); + if ((gr = getgrgid(buf.msg_perm.gid))) printf(" %-10s\n", gr->gr_name); + else printf(" %-10d\n", buf.msg_perm.gid); + } else { + printf("0x%08x ", buf.msg_perm.__key); + if (pw) printf("%-10d %-10.10s", msqid, pw->pw_name); + else printf("%-10d %-10d", msqid, buf.msg_perm.uid); + printf(" %-10o %-12ld %-12ld\n", buf.msg_perm.mode & 0777, + (long) buf.msg_cbytes, (long) buf.msg_qnum); + } + } +} + +void ipcs_main(void) +{ + if (flag(i)) { + if (flag(m)) show_shm_id(); + else if (flag(s)) show_sem_id(); + else if (flag(q)) show_msg_id(); + else { + toys.exithelp++; + error_exit(NULL); + } + return; + } + + if (!(flag(m) || flag(s) || flag(q)) || flag(a)) toys.optflags |= (FLAG_m|FLAG_s|FLAG_q); + + xputc('\n'); + if (flag(m)) { + shm_array(); + xputc('\n'); + } + if (flag(s)) { + sem_array(); + xputc('\n'); + } + if (flag(q)) { + msg_array(); + xputc('\n'); + } +} -- cgit v1.2.3