void
readmach(Machine *m, int init)
{
int n, i;
uint64_t a[nelem(m->devsysstat)];
char buf[32];
if(m->remote && (m->disable || setjmp(catchalarm))){
if (m->disable++ >= 5)
m->disable = 0; /* give it another chance */
memmove(m->devsysstat, m->prevsysstat, sizeof m->devsysstat);
memmove(m->netetherstats, m->prevetherstats, sizeof m->netetherstats);
return;
}
snprint(buf, sizeof buf, "%s", m->name);
if (strcmp(m->name, buf) != 0){
free(m->name);
m->name = estrdup(buf);
free(m->shortname);
m->shortname = shortname(buf);
if(display != nil) /* else we're still initializing */
eresized(0);
}
if(m->remote){
notify(alarmed);
alarm(5000);
}
if(needswap(init) && loadbuf(m, &m->swapfd) && readswap(m, a))
memmove(m->devswap, a, sizeof m->devswap);
if(needstat(init) && loadbuf(m, &m->statsfd)){
memmove(m->prevsysstat, m->devsysstat, sizeof m->devsysstat);
memset(m->devsysstat, 0, sizeof m->devsysstat);
for(n=0; n<m->nproc && readnums(m, nelem(m->devsysstat), a, 0); n++)
for(i=0; i<nelem(m->devsysstat); i++)
m->devsysstat[i] += a[i];
}
if(needether(init) && loadbuf(m, &m->etherfd) && readnums(m, nelem(m->netetherstats), a, 1)){
memmove(m->prevetherstats, m->netetherstats, sizeof m->netetherstats);
memmove(m->netetherstats, a, sizeof m->netetherstats);
}
if(needsignal(init) && loadbuf(m, &m->ifstatsfd) && strncmp(m->buf, "Signal: ", 8)==0 && readnums(m, nelem(m->netetherifstats), a, 1)){
memmove(m->netetherifstats, a, sizeof m->netetherifstats);
}
if(needbattery(init) && loadbuf(m, &m->batteryfd) && readnums(m, nelem(m->batterystats), a, 0))
memmove(m->batterystats, a, sizeof(m->batterystats));
if(needbattery(init) && loadbuf(m, &m->bitsybatfd) && readnums(m, 1, a, 0))
memmove(m->batterystats, a, sizeof(m->batterystats));
if(needtemp(init) && loadbuf(m, &m->tempfd))
for(n=0; n < nelem(m->temp) && readnums(m, 2, a, 0); n++)
m->temp[n] = a[0];
if(m->remote){
alarm(0);
notify(nil);
}
}
void *
a_out_mod_load(int fd)
{
struct exec info_buf;
size_t b;
ssize_t n;
char buf[10 * BUFSIZ];
/*
* Get the load module post load size... do this by reading the
* header and doing page counts.
*/
if (a_out_read_header(fd, &info_buf) < 0)
return NULL;
/*
* Seek to the text offset to start loading...
*/
if (lseek(fd, N_TXTOFF(info_buf), 0) == -1)
err(12, "lseek");
/*
* Transfer the relinked module to kernel memory in chunks of
* MODIOBUF size at a time.
*/
b = info_buf.a_text + info_buf.a_data;
while (b) {
n = read(fd, buf, MIN(b, sizeof(buf)));
if (n < 0)
err(1, "while reading from prelinked module");
if (n == 0)
errx(1, "EOF while reading from prelinked module");
loadbuf(buf, n);
b -= n;
}
return (void *)info_buf.a_entry;
}
int
initmach(Machine *m, char *name)
{
int n, fd;
uint64_t a[MAXNUM];
char *p, mpt[256], buf[256];
p = strchr(name, '!');
if(p)
p++;
else
p = name;
m->name = estrdup(p);
m->shortname = shortname(p);
m->remote = (strcmp(p, mysysname) != 0);
if(m->remote == 0)
strcpy(mpt, "");
else{
snprint(mpt, sizeof mpt, "/n/%s", p);
fd = connectexportfs(name);
if(fd < 0){
fprint(2, "can't connect to %s: %r\n", name);
return 0;
}
/* BUG? need to use amount() now? */
if(mount(fd, -1, mpt, MREPL, "", 'M') < 0){
fprint(2, "stats: mount %s on %s failed (%r); trying /n/sid\n", name, mpt);
strcpy(mpt, "/n/sid");
if(mount(fd, -1, mpt, MREPL, "", 'M') < 0){
fprint(2, "stats: mount %s on %s failed: %r\n", name, mpt);
return 0;
}
}
}
snprint(buf, sizeof buf, "%s/dev/swap", mpt);
m->swapfd = open(buf, OREAD);
if(loadbuf(m, &m->swapfd) && readswap(m, a))
memmove(m->devswap, a, sizeof m->devswap);
else{
m->devswap[Maxswap] = 100;
m->devswap[Maxmem] = 100;
}
snprint(buf, sizeof buf, "%s/dev/sysstat", mpt);
m->statsfd = open(buf, OREAD);
if(loadbuf(m, &m->statsfd)){
for(n=0; readnums(m, nelem(m->devsysstat), a, 0); n++)
;
m->nproc = n;
}else
m->nproc = 1;
m->lgproc = ilog10(m->nproc);
snprint(buf, sizeof buf, "%s/net/ether0/stats", mpt);
m->etherfd = open(buf, OREAD);
if(loadbuf(m, &m->etherfd) && readnums(m, nelem(m->netetherstats), a, 1))
memmove(m->netetherstats, a, sizeof m->netetherstats);
snprint(buf, sizeof buf, "%s/net/ether0/ifstats", mpt);
m->ifstatsfd = open(buf, OREAD);
if(loadbuf(m, &m->ifstatsfd)){
/* need to check that this is a wavelan interface */
if(strncmp(m->buf, "Signal: ", 8) == 0 && readnums(m, nelem(m->netetherifstats), a, 1))
memmove(m->netetherifstats, a, sizeof m->netetherifstats);
}
snprint(buf, sizeof buf, "%s/mnt/apm/battery", mpt);
m->batteryfd = open(buf, OREAD);
m->bitsybatfd = -1;
if(m->batteryfd >= 0){
if(loadbuf(m, &m->batteryfd) && readnums(m, nelem(m->batterystats), a, 0))
memmove(m->batterystats, a, sizeof(m->batterystats));
}else{
snprint(buf, sizeof buf, "%s/dev/battery", mpt);
m->bitsybatfd = open(buf, OREAD);
if(loadbuf(m, &m->bitsybatfd) && readnums(m, 1, a, 0))
memmove(m->batterystats, a, sizeof(m->batterystats));
}
snprint(buf, sizeof buf, "%s/dev/cputemp", mpt);
m->tempfd = open(buf, OREAD);
if(loadbuf(m, &m->tempfd))
for(n=0; n < nelem(m->temp) && readnums(m, 2, a, 0); n++)
m->temp[n] = a[0];
return 1;
}
/* load a prelinked module; returns entry point */
void *
elf_mod_load(int fd)
{
Elf_Ehdr ehdr;
size_t zero_size = 0;
size_t b;
ssize_t n;
char *shstrtab;
struct elf_section *head, *s;
char buf[10 * BUFSIZ];
void *addr = NULL;
if (read_elf_header(fd, &ehdr) < 0)
return NULL;
shstrtab = read_shstring_table(fd, &ehdr);
read_sections(fd, &ehdr, shstrtab, &head);
for (s = head; s; s = s->next) {
if (s->type != SHT_STRTAB && s->type != SHT_SYMTAB &&
s->type != SHT_DYNSYM) {
if (debug)
fprintf(stderr, "loading `%s': addr = %p, "
"size = %#lx\n",
s->name, s->addr, (u_long)s->size);
if (s->type == SHT_NOBITS) {
/* skip some space */
zero_size += s->size;
} else {
if (addr != NULL) {
/*
* if there is a gap in the prelinked
* module, transfer some empty space.
*/
zero_size += (char*)s->addr -
(char*)addr;
}
if (zero_size) {
loadspace(zero_size);
zero_size = 0;
}
b = s->size;
if (lseek(fd, s->offset, SEEK_SET) == -1)
err(1, "lseek");
while (b) {
n = read(fd, buf, MIN(b, sizeof(buf)));
if (n == 0)
errx(1, "unexpected EOF");
if (n < 0)
err(1, "read");
loadbuf(buf, n);
b -= n;
}
addr = (char*)s->addr + s->size;
}
}
}
if (zero_size)
loadspace(zero_size);
free_sections(head);
free(shstrtab);
return (void *)ehdr.e_entry;
}
