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em: save pid and boot file inode for security checks

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This commit is contained in:
Jim 2012-07-18 23:56:49 -04:00
parent b68b4ea92b
commit 371c051d16
1 changed files with 21 additions and 4 deletions
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25
em.c
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@ -130,6 +130,7 @@ gvp->tracetriggered = 1; this simulates the Ctrl-t.
#include <sys/select.h>
#include <termios.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
@ -334,6 +335,7 @@ typedef struct {
} license_t;
license_t license;
static int mypid;
#ifdef NOTRACE
#define TRACE(flags, formatargs...)
@ -592,6 +594,8 @@ brp_t *eap;
static jmp_buf jmpbuf; /* for longjumps to the fetch loop */
static jmp_buf bootjmp; /* for longjumps to the fetch loop */
static unsigned long bootuid;
/* The standard Prime physical memory limit on early machines is 8MB.
Later machines have higher memory capacities, up to 1024MB, using
32-bit page tables.
@ -791,7 +795,7 @@ int readlicense(int first) {
bcopy((char *)newlicense.rserver->h_addr, (char *)&raddr.sin_addr.s_addr, newlicense.rserver->h_length);
license = newlicense;
if (first)
printf("License id: %08x server %s [%s:%d]\n", license.id, license.server, (char *) inet_ntoa(raddr.sin_addr.s_addr), license.sport);
printf("License id %08x, server %s [%s:%d]\n", license.id, license.server, (char *) inet_ntoa(raddr.sin_addr.s_addr), license.sport);
#endif
return 1;
@ -1610,7 +1614,7 @@ void sensorcheck () {
}
void sigquit() {
if (sensorabort || (getcrs16(MODALS) & 010) == 0)
if (sensorabort || ((getcrs16(MODALS) & 010) == 0))
fatal("Quit");
else {
printf("\nem: sigquit received, Primos may shutdown soon\n");
@ -3516,9 +3520,9 @@ static dispatcher() {
/* if this process' abort flags are set, clear them and take process fault */
utempa = get16r0(pcbp+PCBABT);
if (pcbw == 0100100 && sensorabort) {
if (pcbw == 0100100 && sensorabort == 1) {
utempa |= 01000; /* set user 1's sensor check abort flag */
sensorabort = 0;
sensorabort = 2;
}
if (utempa != 0) {
TRACE(T_PX, "dispatch: abort flags for %o are %o\n", getcrs16(OWNERL), utempa);
@ -4437,6 +4441,8 @@ main (int argc, char **argv) {
exit(0);
}
mypid = getpid();
/* re-open stderr as error.log */
close(2);
@ -4940,6 +4946,17 @@ a filename, CPU registers and keys are loaded from the runfile header.\n\
perror("Error skipping on boot device");
fatal(NULL);
}
/* save boot file inode; this gets sent in security checks */
{
struct stat statbuf;
if ((i=fstat(bootfd, &statbuf)) == -1) {
perror("Error fstat on boot file");
fatal(NULL);
}
bootuid = statbuf.st_ino;
}
close(bootfd);
/* check we got it all */