Top, welcome to minix.
Minix, welcome to the world of top. A from-scratch top implementation for minix!
This commit is contained in:
Ben Gras
parent
6e7ba75acb
commit
fcd663d75f
2 changed files with 267 additions and 0 deletions
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@ -188,6 +188,7 @@ ALL = \
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tget \
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time \
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touch \
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top \
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tr \
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truncate \
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treecmp \
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@ -808,6 +809,9 @@ touch: touch.c
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$(CCLD) -o $@ $?
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@install -S 4kw $@
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top: top.c
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$(CCLD) -o $@ $?
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tr: tr.c
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$(CCLD) -o $@ $?
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@install -S 4kw $@
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@ -1077,6 +1081,7 @@ install: \
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/usr/bin/termcap \
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/usr/bin/tget \
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/usr/bin/time \
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/usr/bin/top \
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/usr/bin/touch \
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/usr/bin/tr \
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/usr/bin/treecmp \
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@ -1610,6 +1615,9 @@ install: \
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/usr/bin/time: time
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install -cs -o bin $? $@
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/usr/bin/top: top
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install -cs -o bin $? $@
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/usr/bin/touch: touch
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install -cs -o bin $? $@
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259
commands/simple/top.c
Normal file
259
commands/simple/top.c
Normal file
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@ -0,0 +1,259 @@
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#define _MINIX 1
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#define _POSIX_SOURCE 1
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#include <stdio.h>
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#include <pwd.h>
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#include <timers.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <termcap.h>
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#include <termios.h>
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#include <time.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/ioc_tty.h>
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#include <sys/times.h>
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#include <sys/types.h>
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#include <minix/ipc.h>
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#include <minix/config.h>
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#include <minix/type.h>
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#include <minix/const.h>
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#include "../../servers/pm/mproc.h"
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#include "../../kernel/const.h"
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#include "../../kernel/proc.h"
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char *Tclr_all;
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#define TC_BUFFER 1024 /* Size of termcap(3) buffer */
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#define TC_STRINGS 200 /* Enough room for cm,cl,so,se */
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int print_memory(struct pm_mem_info *pmi)
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{
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int h;
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int largest_bytes = 0, total_bytes = 0;
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for(h = 0; h < _NR_HOLES; h++) {
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if(pmi->pmi_holes[h].h_base && pmi->pmi_holes[h].h_len) {
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int bytes;
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bytes = pmi->pmi_holes[h].h_len << CLICK_SHIFT;
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if(bytes > largest_bytes) largest_bytes = bytes;
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total_bytes += bytes;
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}
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}
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printf("Mem: %dK Free, %dK Contiguous Free\n",
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total_bytes/1024, largest_bytes/1024);
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return 1;
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}
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int print_load(double *loads, int nloads)
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{
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int i;
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printf("load averages: ");
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for(i = 0; i < nloads; i++)
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printf("%s %.2f", (i > 0) ? "," : "", loads[i]);
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printf("\n");
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return 1;
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}
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#define PROCS (NR_PROCS+NR_TASKS)
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int print_proc_summary(struct proc *proc)
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{
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int p, alive, running, sleeping;
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alive = running = sleeping = 0;
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for(p = 0; p < PROCS; p++) {
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if(p - NR_TASKS == IDLE)
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continue;
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if(proc[p].p_rts_flags & SLOT_FREE)
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continue;
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alive++;
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if(proc[p].p_rts_flags & ~SLOT_FREE)
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sleeping++;
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else
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running++;
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}
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printf("%d processes: %d running, %d sleeping\n",
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alive, running, sleeping);
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return 1;
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}
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static struct tp {
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struct proc *p;
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int ticks;
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} tick_procs[PROCS];
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int cmp_ticks(const void *v1, const void *v2)
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{
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struct tp *p1 = (struct tp *) v1, *p2 = (struct tp *) v2;
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if(p1->ticks < p2->ticks)
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return 1;
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if(p1->ticks > p2->ticks)
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return -1;
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if(p1->p->p_nr < p2->p->p_nr)
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return -1;
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if(p1->p->p_nr > p2->p->p_nr)
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return 1;
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return 0;
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}
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void print_procs(int maxlines,
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struct proc *proc1, struct proc *proc2, int dt,
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struct mproc *mproc)
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{
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int p, nprocs;
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int idleticks = 0;
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for(p = nprocs = 0; p < PROCS; p++) {
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if(proc2[p].p_rts_flags & SLOT_FREE)
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continue;
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tick_procs[nprocs].p = proc2 + p;
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tick_procs[nprocs].ticks =
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proc2[p].p_user_time-proc1[p].p_user_time;
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if(p-NR_TASKS == IDLE) {
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idleticks = tick_procs[nprocs].ticks;
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continue;
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}
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nprocs++;
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}
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qsort(tick_procs, nprocs, sizeof(tick_procs[0]), cmp_ticks);
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printf("CPU states: %5.2f%% user, %5.2f%% idle\n\n",
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100.0*(dt-idleticks)/dt, 100.0*idleticks/dt);
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maxlines -= 2;
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printf(" PID USERNAME PRI NICE SIZE STATE TIME CPU COMMAND\n");
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maxlines--;
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for(p = 0; p < nprocs; p++) {
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int euid = 0;
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struct passwd *who = NULL;
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struct proc *pr;
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int pnr, ticks;
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char *name = "";
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if(maxlines-- <= 0) break;
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pnr = tick_procs[p].p->p_nr;
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pr = tick_procs[p].p;
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ticks = pr->p_user_time;
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if(pnr >= 0) {
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printf("%5d ", mproc[pnr].mp_pid);
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euid = mproc[pnr].mp_effuid;
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name = mproc[pnr].mp_name;
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} else {
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printf("[%3d] ", pnr);
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name = pr->p_name;
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}
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who = getpwuid(euid);
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if(who && who->pw_name) printf("%-8s ", who->pw_name);
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else if(pnr >= 0) printf("%8d ", mproc[pnr].mp_effuid);
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else printf(" ");
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printf(" %2d ", pr->p_priority);
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if(pnr >= 0) {
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printf(" %3d ", mproc[pnr].mp_nice);
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} else printf(" ");
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printf("%5dK",
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((pr->p_memmap[T].mem_len +
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pr->p_memmap[D].mem_len) << CLICK_SHIFT)/1024);
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printf("%6s", pr->p_rts_flags ? "" : "RUN");
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printf(" %3d:%02d ", (ticks/HZ/60), (ticks/HZ)%60);
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printf("%5.2f%% %s\n",
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100.0*tick_procs[p].ticks/dt, name);
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}
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}
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void showtop(void)
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{
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#define NLOADS 3
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double loads[NLOADS];
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int nloads, i, p, lines = 0;
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static struct proc prev_proc[PROCS], proc[PROCS];
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struct winsize winsize;
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static struct pm_mem_info pmi;
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static int prev_uptime, uptime;
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static struct mproc mproc[NR_PROCS];
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struct tms tms;
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uptime = times(&tms);
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if(ioctl(STDIN_FILENO, TIOCGWINSZ, &winsize) != 0) {
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perror("TIOCGWINSZ");
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fprintf(stderr, "TIOCGWINSZ failed\n");
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exit(1);
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}
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if(getsysinfo(PM_PROC_NR, SI_MEM_ALLOC, &pmi) < 0) {
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fprintf(stderr, "getsysinfo() for SI_MEM_ALLOC failed.\n");
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exit(1);;
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}
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if(getsysinfo(PM_PROC_NR, SI_KPROC_TAB, proc) < 0) {
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fprintf(stderr, "getsysinfo() for SI_KPROC_TAB failed.\n");
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exit(1);
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}
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if(getsysinfo(PM_PROC_NR, SI_PROC_TAB, mproc) < 0) {
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fprintf(stderr, "getsysinfo() for SI_PROC_TAB failed.\n");
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exit(1);
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}
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if((nloads = getloadavg(loads, NLOADS)) != NLOADS) {
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fprintf(stderr, "getloadavg() failed - %d loads\n", nloads);
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exit(1);
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}
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printf("%s", Tclr_all);
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lines += print_load(loads, NLOADS);
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lines += print_proc_summary(proc);
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lines += print_memory(&pmi);
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print_procs(winsize.ws_row - lines - 2, prev_proc,
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proc, uptime-prev_uptime, mproc);
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memcpy(prev_proc, proc, sizeof(prev_proc));
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prev_uptime = uptime;
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}
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void init(void)
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{
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char *term;
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static char buffer[TC_BUFFER], strings[TC_STRINGS];
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char *s = strings;
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if(!(term = getenv("TERM"))) {
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fprintf(stderr, "No TERM set\n");
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exit(1);
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}
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if ( tgetent( buffer, term ) != 1 ) {
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fprintf(stderr, "tgetent failed for term %s\n", term);
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exit(1);
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}
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if ( (Tclr_all = tgetstr( "cl", &s )) == NULL )
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Tclr_all = "\f";
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}
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int main(int argc, char *argv[])
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{
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init();
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while(1) {
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showtop();
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sleep(5);
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}
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}
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