/* $OpenBSD: machine.c,v 1.23 2001/02/22 03:10:24 deraadt Exp $ */ /* * top - a top users display for Unix * * SYNOPSIS: For an OpenBSD system * * DESCRIPTION: * This is the machine-dependent module for OpenBSD * Tested on: * i386 * * TERMCAP: -ltermlib * * CFLAGS: -DHAVE_GETOPT -DORDER * * AUTHOR: Thorsten Lockert * Adapted from BSD4.4 by Christos Zoulas * Patch for process wait display by Jarl F. Greipsland * Patch for -DORDER by Kenneth Stailey * Patch for new swapctl(2) by Tobias Weingartner */ #include #include #include #define DOSWAP #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DOSWAP #include #include #endif static int getkval __P((unsigned long, int *, int, char *)); static int swapmode __P((int *, int *)); #include "top.h" #include "display.h" #include "machine.h" #include "utils.h" /* get_process_info passes back a handle. This is what it looks like: */ struct handle { struct kinfo_proc **next_proc; /* points to next valid proc pointer */ int remaining; /* number of pointers remaining */ }; /* declarations for load_avg */ #include "loadavg.h" #define PP(pp, field) ((pp)->kp_proc . field) #define EP(pp, field) ((pp)->kp_eproc . field) #define VP(pp, field) ((pp)->kp_eproc.e_vm . field) /* what we consider to be process size: */ #define PROCSIZE(pp) (VP((pp), vm_tsize) + VP((pp), vm_dsize) + VP((pp), vm_ssize)) /* * These definitions control the format of the per-process area */ static char header[] = " PID X PRI NICE SIZE RES STATE WAIT TIME CPU COMMAND"; /* 0123456 -- field to fill in starts at header+6 */ #define UNAME_START 6 #define Proc_format \ "%5d %-8.8s %3d %4d %5s %5s %-5s %-6.6s %6s %5.2f%% %.14s" /* process state names for the "STATE" column of the display */ /* the extra nulls in the string "run" are for adding a slash and the processor number when needed */ char *state_abbrev[] = { "", "start", "run\0\0\0", "sleep", "stop", "zomb", }; static int stathz; /* these are offsets obtained via nlist and used in the get_ functions */ static unsigned long cp_time_offset; /* these are for calculating cpu state percentages */ static long cp_time[CPUSTATES]; static long cp_old[CPUSTATES]; static long cp_diff[CPUSTATES]; /* these are for detailing the process states */ int process_states[7]; char *procstatenames[] = { "", " starting, ", " running, ", " idle, ", " stopped, ", " zombie, ", NULL }; /* these are for detailing the cpu states */ int cpu_states[CPUSTATES]; char *cpustatenames[] = { "user", "nice", "system", "interrupt", "idle", NULL }; /* these are for detailing the memory statistics */ int memory_stats[8]; char *memorynames[] = { "Real: ", "K/", "K act/tot ", "Free: ", "K ", #ifdef DOSWAP "Swap: ", "K/", "K used/tot", #endif NULL }; #ifdef ORDER /* these are names given to allowed sorting orders -- first is default */ char *ordernames[] = {"cpu", "size", "res", "time", "pri", NULL}; #endif /* these are for keeping track of the proc array */ static int nproc; static int onproc = -1; static int pref_len; static struct kinfo_proc *pbase; static struct kinfo_proc **pref; /* these are for getting the memory statistics */ static int pageshift; /* log base 2 of the pagesize */ /* define pagetok in terms of pageshift */ #define pagetok(size) ((size) << pageshift) int getstathz() { struct clockinfo cinf; size_t size = sizeof(cinf); int mib[2]; mib[0] = CTL_KERN; mib[1] = KERN_CLOCKRATE; if (sysctl(mib, 2, &cinf, &size, NULL, 0) == -1) return (-1); return (cinf.stathz); } int machine_init(statics) struct statics *statics; { char errbuf[_POSIX2_LINE_MAX]; int pagesize, i = 0; stathz = getstathz(); if (stathz == -1) return (-1); pbase = NULL; pref = NULL; onproc = -1; nproc = 0; /* get the page size with "getpagesize" and calculate pageshift from * it */ pagesize = getpagesize(); pageshift = 0; while (pagesize > 1) { pageshift++; pagesize >>= 1; } /* we only need the amount of log(2)1024 for our conversion */ pageshift -= LOG1024; /* fill in the statics information */ statics->procstate_names = procstatenames; statics->cpustate_names = cpustatenames; statics->memory_names = memorynames; #ifdef ORDER statics->order_names = ordernames; #endif return (0); } char * format_header(uname_field) char *uname_field; { char *ptr; ptr = header + UNAME_START; while (*uname_field != '\0') { *ptr++ = *uname_field++; } return (header); } void get_system_info(si) struct system_info *si; { static int sysload_mib[] = {CTL_VM, VM_LOADAVG}; static int vmtotal_mib[] = {CTL_VM, VM_METER}; static int cp_time_mib[] = { CTL_KERN, KERN_CPTIME }; struct loadavg sysload; struct vmtotal vmtotal; double *infoloadp; int total, i; size_t size; size = sizeof(cp_time); if (sysctl(cp_time_mib, 2, &cp_time, &size, NULL, 0) < 0) { warn("sysctl kern.cp_time failed"); total = 0; } size = sizeof(sysload); if (sysctl(sysload_mib, 2, &sysload, &size, NULL, 0) < 0) { warn("sysctl failed"); total = 0; } infoloadp = si->load_avg; for (i = 0; i < 3; i++) *infoloadp++ = ((double) sysload.ldavg[i]) / sysload.fscale; /* convert cp_time counts to percentages */ total = percentages(CPUSTATES, cpu_states, cp_time, cp_old, cp_diff); /* get total -- systemwide main memory usage structure */ size = sizeof(vmtotal); if (sysctl(vmtotal_mib, 2, &vmtotal, &size, NULL, 0) < 0) { warn("sysctl failed"); bzero(&vmtotal, sizeof(vmtotal)); } /* convert memory stats to Kbytes */ memory_stats[0] = -1; memory_stats[1] = pagetok(vmtotal.t_arm); memory_stats[2] = pagetok(vmtotal.t_rm); memory_stats[3] = -1; memory_stats[4] = pagetok(vmtotal.t_free); memory_stats[5] = -1; #ifdef DOSWAP if (!swapmode(&memory_stats[6], &memory_stats[7])) { memory_stats[6] = 0; memory_stats[7] = 0; } #endif /* set arrays and strings */ si->cpustates = cpu_states; si->memory = memory_stats; si->last_pid = -1; } static struct handle handle; struct kinfo_proc * getprocs(op, arg, cnt) int op, arg; int *cnt; { size_t size = 0; int mib[4] = {CTL_KERN, KERN_PROC, op, arg}; int st, nprocs; static struct kinfo_proc *procbase; st = sysctl(mib, 4, NULL, &size, NULL, 0); if (st == -1) { /* _kvm_syserr(kd, kd->program, "kvm_getprocs"); */ return (0); } if (procbase) free(procbase); procbase = (struct kinfo_proc *)malloc(size); if (procbase == NULL) return (0); st = sysctl(mib, 4, procbase, &size, NULL, 0); if (st == -1) { /* _kvm_syserr(kd, kd->program, "kvm_getprocs"); */ return (0); } if (size % sizeof(struct kinfo_proc) != 0) { /* _kvm_err(kd, kd->program, "proc size mismatch (%d total, %d chunks)", size, sizeof(struct kinfo_proc)); */ return (0); } *cnt = size / sizeof(struct kinfo_proc); return (procbase); } caddr_t get_process_info(si, sel, compare) struct system_info *si; struct process_select *sel; int (*compare) __P((const void *, const void *)); { int show_idle, show_system, show_uid, show_command; int total_procs, active_procs, i; struct kinfo_proc **prefp, *pp; if ((pbase = getprocs(KERN_PROC_KTHREAD, 0, &nproc)) == NULL) { /* warnx("%s", kvm_geterr(kd)); */ quit(23); } if (nproc > onproc) pref = (struct kinfo_proc **) realloc(pref, sizeof(struct kinfo_proc *) * (onproc = nproc)); if (pref == NULL) { warnx("Out of memory."); quit(23); } /* get a pointer to the states summary array */ si->procstates = process_states; /* set up flags which define what we are going to select */ show_idle = sel->idle; show_system = sel->system; show_uid = sel->uid != -1; show_command = sel->command != NULL; /* count up process states and get pointers to interesting procs */ total_procs = 0; active_procs = 0; memset((char *) process_states, 0, sizeof(process_states)); prefp = pref; for (pp = pbase, i = 0; i < nproc; pp++, i++) { /* * Place pointers to each valid proc structure in pref[]. * Process slots that are actually in use have a non-zero * status field. Processes with SSYS set are system * processes---these get ignored unless show_sysprocs is set. */ if (PP(pp, p_stat) != 0 && (show_system || ((PP(pp, p_flag) & P_SYSTEM) == 0))) { total_procs++; process_states[(unsigned char) PP(pp, p_stat)]++; if ((PP(pp, p_stat) != SZOMB) && (show_idle || (PP(pp, p_pctcpu) != 0) || (PP(pp, p_stat) == SRUN)) && (!show_uid || EP(pp, e_pcred.p_ruid) == (uid_t) sel->uid)) { *prefp++ = pp; active_procs++; } } } /* if requested, sort the "interesting" processes */ if (compare != NULL) { qsort((char *) pref, active_procs, sizeof(struct kinfo_proc *), compare); } /* remember active and total counts */ si->p_total = total_procs; si->p_active = pref_len = active_procs; /* pass back a handle */ handle.next_proc = pref; handle.remaining = active_procs; return ((caddr_t) & handle); } char fmt[MAX_COLS]; /* static area where result is built */ char * format_next_process(handle, get_userid) caddr_t handle; char *(*get_userid)(); { char waddr[sizeof(void *) * 2 + 3]; /* Hexify void pointer */ struct kinfo_proc *pp; struct handle *hp; char *p_wait; int cputime; double pct; /* find and remember the next proc structure */ hp = (struct handle *) handle; pp = *(hp->next_proc++); hp->remaining--; /* get the process's user struct and set cputime */ if ((PP(pp, p_flag) & P_INMEM) == 0) { /* * Print swapped processes as */ char *comm = PP(pp, p_comm); #define COMSIZ sizeof(PP(pp, p_comm)) char buf[COMSIZ]; (void) strncpy(buf, comm, COMSIZ); comm[0] = '<'; (void) strncpy(&comm[1], buf, COMSIZ - 2); comm[COMSIZ - 2] = '\0'; (void) strncat(comm, ">", COMSIZ - 1); comm[COMSIZ - 1] = '\0'; } cputime = (PP(pp, p_uticks) + PP(pp, p_sticks) + PP(pp, p_iticks)) / stathz; /* calculate the base for cpu percentages */ pct = pctdouble(PP(pp, p_pctcpu)); if (PP(pp, p_wchan)) if (PP(pp, p_wmesg)) p_wait = EP(pp, e_wmesg); else { snprintf(waddr, sizeof(waddr), "%lx", (unsigned long) (PP(pp, p_wchan)) & ~KERNBASE); p_wait = waddr; } else p_wait = "-"; /* format this entry */ snprintf(fmt, MAX_COLS, Proc_format, PP(pp, p_pid), (*get_userid) (EP(pp, e_pcred.p_ruid)), PP(pp, p_priority) - PZERO, PP(pp, p_nice) - NZERO, format_k(pagetok(PROCSIZE(pp))), format_k(pagetok(VP(pp, vm_rssize))), (PP(pp, p_stat) == SSLEEP && PP(pp, p_slptime) > MAXSLP) ? "idle" : state_abbrev[(unsigned char) PP(pp, p_stat)], p_wait, format_time(cputime), 100.0 * pct, printable(PP(pp, p_comm))); /* return the result */ return (fmt); } /* comparison routine for qsort */ static unsigned char sorted_state[] = { 0, /* not used */ 4, /* start */ 5, /* run */ 2, /* sleep */ 3, /* stop */ 1 /* zombie */ }; #ifdef ORDER /* * proc_compares - comparison functions for "qsort" */ /* * First, the possible comparison keys. These are defined in such a way * that they can be merely listed in the source code to define the actual * desired ordering. */ #define ORDERKEY_PCTCPU \ if (lresult = (pctcpu)PP(p2, p_pctcpu) - (pctcpu)PP(p1, p_pctcpu), \ (result = lresult > 0 ? 1 : lresult < 0 ? -1 : 0) == 0) #define ORDERKEY_CPUTIME \ if ((result = PP(p2, p_rtime.tv_sec) - PP(p1, p_rtime.tv_sec)) == 0) \ if ((result = PP(p2, p_rtime.tv_usec) - \ PP(p1, p_rtime.tv_usec)) == 0) #define ORDERKEY_STATE \ if ((result = sorted_state[(unsigned char) PP(p2, p_stat)] - \ sorted_state[(unsigned char) PP(p1, p_stat)]) == 0) #define ORDERKEY_PRIO \ if ((result = PP(p2, p_priority) - PP(p1, p_priority)) == 0) #define ORDERKEY_RSSIZE \ if ((result = VP(p2, vm_rssize) - VP(p1, vm_rssize)) == 0) #define ORDERKEY_MEM \ if ((result = PROCSIZE(p2) - PROCSIZE(p1)) == 0) /* compare_cpu - the comparison function for sorting by cpu percentage */ int compare_cpu(v1, v2) const void *v1, *v2; { struct proc **pp1 = (struct proc **) v1; struct proc **pp2 = (struct proc **) v2; struct kinfo_proc *p1; struct kinfo_proc *p2; int result; pctcpu lresult; /* remove one level of indirection */ p1 = *(struct kinfo_proc **) pp1; p2 = *(struct kinfo_proc **) pp2; ORDERKEY_PCTCPU ORDERKEY_CPUTIME ORDERKEY_STATE ORDERKEY_PRIO ORDERKEY_RSSIZE ORDERKEY_MEM ; return (result); } /* compare_size - the comparison function for sorting by total memory usage */ int compare_size(v1, v2) const void *v1, *v2; { struct proc **pp1 = (struct proc **) v1; struct proc **pp2 = (struct proc **) v2; struct kinfo_proc *p1; struct kinfo_proc *p2; int result; pctcpu lresult; /* remove one level of indirection */ p1 = *(struct kinfo_proc **) pp1; p2 = *(struct kinfo_proc **) pp2; ORDERKEY_MEM ORDERKEY_RSSIZE ORDERKEY_PCTCPU ORDERKEY_CPUTIME ORDERKEY_STATE ORDERKEY_PRIO ; return (result); } /* compare_res - the comparison function for sorting by resident set size */ int compare_res(v1, v2) const void *v1, *v2; { struct proc **pp1 = (struct proc **) v1; struct proc **pp2 = (struct proc **) v2; struct kinfo_proc *p1; struct kinfo_proc *p2; int result; pctcpu lresult; /* remove one level of indirection */ p1 = *(struct kinfo_proc **) pp1; p2 = *(struct kinfo_proc **) pp2; ORDERKEY_RSSIZE ORDERKEY_MEM ORDERKEY_PCTCPU ORDERKEY_CPUTIME ORDERKEY_STATE ORDERKEY_PRIO ; return (result); } /* compare_time - the comparison function for sorting by CPU time */ int compare_time(v1, v2) const void *v1, *v2; { struct proc **pp1 = (struct proc **) v1; struct proc **pp2 = (struct proc **) v2; struct kinfo_proc *p1; struct kinfo_proc *p2; int result; pctcpu lresult; /* remove one level of indirection */ p1 = *(struct kinfo_proc **) pp1; p2 = *(struct kinfo_proc **) pp2; ORDERKEY_CPUTIME ORDERKEY_PCTCPU ORDERKEY_STATE ORDERKEY_PRIO ORDERKEY_MEM ORDERKEY_RSSIZE ; return (result); } /* compare_prio - the comparison function for sorting by CPU time */ int compare_prio(v1, v2) const void *v1, *v2; { struct proc **pp1 = (struct proc **) v1; struct proc **pp2 = (struct proc **) v2; struct kinfo_proc *p1; struct kinfo_proc *p2; int result; pctcpu lresult; /* remove one level of indirection */ p1 = *(struct kinfo_proc **) pp1; p2 = *(struct kinfo_proc **) pp2; ORDERKEY_PRIO ORDERKEY_PCTCPU ORDERKEY_CPUTIME ORDERKEY_STATE ORDERKEY_RSSIZE ORDERKEY_MEM ; return (result); } int (*proc_compares[]) () = { compare_cpu, compare_size, compare_res, compare_time, compare_prio, NULL }; #else /* * proc_compare - comparison function for "qsort" * Compares the resource consumption of two processes using five * distinct keys. The keys (in descending order of importance) are: * percent cpu, cpu ticks, state, resident set size, total virtual * memory usage. The process states are ordered as follows (from least * to most important): zombie, sleep, stop, start, run. The array * declaration below maps a process state index into a number that * reflects this ordering. */ int proc_compare(v1, v2) const void *v1, *v2; { struct proc **pp1 = (struct proc **) v1; struct proc **pp2 = (struct proc **) v2; struct kinfo_proc *p1; struct kinfo_proc *p2; int result; pctcpu lresult; /* remove one level of indirection */ p1 = *(struct kinfo_proc **) pp1; p2 = *(struct kinfo_proc **) pp2; /* compare percent cpu (pctcpu) */ if ((lresult = PP(p2, p_pctcpu) - PP(p1, p_pctcpu)) == 0) { /* use CPU usage to break the tie */ if ((result = PP(p2, p_rtime).tv_sec - PP(p1, p_rtime).tv_sec) == 0) { /* use process state to break the tie */ if ((result = sorted_state[(unsigned char) PP(p2, p_stat)] - sorted_state[(unsigned char) PP(p1, p_stat)]) == 0) { /* use priority to break the tie */ if ((result = PP(p2, p_priority) - PP(p1, p_priority)) == 0) { /* use resident set size (rssize) to * break the tie */ if ((result = VP(p2, vm_rssize) - VP(p1, vm_rssize)) == 0) { /* use total memory to break * the tie */ result = PROCSIZE(p2) - PROCSIZE(p1); } } } } } else { result = lresult < 0 ? -1 : 1; } return (result); } #endif /* * proc_owner(pid) - returns the uid that owns process "pid", or -1 if * the process does not exist. * It is EXTREMLY IMPORTANT that this function work correctly. * If top runs setuid root (as in SVR4), then this function * is the only thing that stands in the way of a serious * security problem. It validates requests for the "kill" * and "renice" commands. */ int proc_owner(pid) pid_t pid; { struct kinfo_proc **prefp, *pp; int cnt; prefp = pref; cnt = pref_len; while (--cnt >= 0) { pp = *prefp++; if (PP(pp, p_pid) == pid) { return ((int) EP(pp, e_pcred.p_ruid)); } } return (-1); } #ifdef DOSWAP /* * swapmode is rewritten by Tobias Weingartner * to be based on the new swapctl(2) system call. */ static int swapmode(used, total) int *used; int *total; { int nswap, rnswap, i; struct swapent *swdev; nswap = swapctl(SWAP_NSWAP, 0, 0); if (nswap == 0) return 0; swdev = malloc(nswap * sizeof(*swdev)); if (swdev == NULL) return 0; rnswap = swapctl(SWAP_STATS, swdev, nswap); if (rnswap == -1) return 0; /* if rnswap != nswap, then what? */ /* Total things up */ *total = *used = 0; for (i = 0; i < nswap; i++) { if (swdev[i].se_flags & SWF_ENABLE) { *used += (swdev[i].se_inuse / (1024 / DEV_BSIZE)); *total += (swdev[i].se_nblks / (1024 / DEV_BSIZE)); } } free(swdev); return 1; } #endif