calmsacibis995
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
/*
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* AIM Suite III v3.1.1
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* (C) Copyright AIM Technology Inc. 1986,87,88,89,90,91,92.
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* All Rights Reserved.
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*/
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#ifndef lint
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static char sccs_id[] = { " @(#) vmctl.c:3.2 5/30/92 20:19:00" };
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#endif
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#include <stdio.h>
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#include <signal.h>
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#include "vmtest.h"
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#include "testerr.h"
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/*
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* vmctl provides the interface to the memory exerciser.
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* the first parameter, results is a pointer to long and is used for the
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* exerciser to write information into. this information is the number of
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* bytes used in the test.
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* the second parameter, cmd is what the exerciser is supposed to do.
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* this currently can be either die or continue.
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*/
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vmctl(results,cmd)
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long *results;
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int cmd;
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{
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static int pid = -1;
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static int fdes[2];
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long tmp;
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#ifdef DEBUGON
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char dbbuf[10];
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#endif
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if(pid == -1 && cmd != KILLMEM) { /* starting the test */
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if(pipe(fdes) < 0) {
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VMDEBUG(fprintf(stderr, "vmctl: couldn't create pipe\n"));
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return BADPIPE;
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}
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if((pid = fork()) < 0) {
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pid = -1;
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close(fdes[0]);
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close(fdes[1]);
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VMDEBUG(fprintf(stderr, "vmctl: couldn't fork()\n"));
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return BADPROC;
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}
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if(pid == 0) { /* then this is the child */
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close(fdes[0]);
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close(1);
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dup(fdes[1]);
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close(fdes[1]);
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#ifdef DEBUGON
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sprintf(dbbuf,"%ld",debug);
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execl("./vmdrvr","vmdrvr",dbbuf,0);
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#else
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execl("./vmdrvr","vmdrvr",0);
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#endif
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tmp = BADPROC; /* to get here something is wrong */
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write(1,&tmp,sizeof tmp);
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exit(1);
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}
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close(fdes[1]);
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read(fdes[0],&tmp,sizeof tmp); /* wait for child to get the memory */
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*results = tmp;
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if(tmp <= 0) { /* something's gone wrong */
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VMDEBUG(fprintf(stderr, "vmctl: couldn't execl(vmdrvr)\n"));
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wait(0L); /* put zombie to rest */
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return (int)tmp;
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}
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return 0;
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}
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if(kill(pid,SIGHUP) == 0)
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read(fdes[0],results,sizeof *results);
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else
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*results = -1;
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if(*results <= 0) {
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cmd = KILLMEM;
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}
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switch(cmd) {
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case KILLMEM:
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VMDEBUG(fprintf(stderr, "killing the vmem exerciser\n"));
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if(pid >= 0) {
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kill(pid,SIGKILL);
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wait((int *)0);
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pid = -1;
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close(fdes[0]);
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fdes[0] = fdes[1] = -1;
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}
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break;
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default: /* including CONTINUE */
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VMDEBUG(fprintf(stderr, "continuing with the vmem exerciser\n"));
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kill(pid,SIGINT);
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break;
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}
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return 1;
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}
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