void brp_parse_config()
{
/*
* Free memory associated with previous config parsing
*/
free_config();
/*
* Ensure we're using a root-modifiable-only configuration file, just in case.
*/
if (!check_config_secure(CONFIG)) {
fprintf(stderr, "brp: config file at "CONFIG" is not secure, refusing to continue.\n");
exit(1);
}
int nsec;
struct section *sec = parse_config(CONFIG, &nsec), *sec_curr = sec;
if (sec == NULL)
exit(1);
size_t arrsz = 0;
while(sec_curr) {
if (strcmp(sec_curr->name, "stratum-order"))
out_item_count += sec_curr->nent;
else {
arrsz = sec_curr->nent+1;
stratum = calloc(sec_curr->nent+1, sizeof(void *));
struct entry *e = sec_curr->e;
while(e) {
_add_stratum(&stratum, &arrsz, e->lhs);
e = e->next;
}
}
sec_curr = sec_curr->next;
}
struct dirent *dent;
DIR *d = opendir("/bedrock/run/enabled_strata/");
if (!d) {
perror("Failed to list enabled strata");
exit(1);
}
if (!arrsz) {
arrsz = 1;
stratum = calloc(1, sizeof(void *));
}
while((dent = readdir(d)))
if (strncmp(dent->d_name, ".", 1) && strncmp(dent->d_name, "..", 2))
_add_stratum(&stratum, &arrsz, dent->d_name);
closedir(d);
char **tmp_s = stratum;
nstratum = 0;
while(*tmp_s) {
nstratum++;
tmp_s++;
}
stratum_len = malloc(sizeof(size_t)*nstratum);
for(int st = 0; st < nstratum; st++)
stratum_len[st] = strlen(stratum[st]);
out_items = malloc(out_item_count*sizeof(struct out_item));
sec_curr = sec;
int i = 0;
int curr_filter = 0;
while(sec_curr) {
struct entry *e = sec_curr->e;
if (strcmp(sec_curr->name, "pass") == 0) {
curr_filter = FILTER_PASS;
} else if (strcmp(sec_curr->name, "brc-wrap") == 0) {
curr_filter = FILTER_BRC_WRAP;
} else if (strcmp(sec_curr->name, "exec-filter") == 0) {
curr_filter = FILTER_EXEC;
} else if (strcmp(sec_curr->name, "stratum-order") == 0){
sec_curr = sec_curr->next;
continue;
} else {
fprintf(stderr, "brp: Failed to parse config\n");
exit(1);
}
while(e) {
/* get path */
out_items[i].path = strdup(e->lhs);
out_items[i].path_len = e->lhs_len;
if (out_items[i].path[out_items[i].path_len-1] == '/') {
out_items[i].file_type = FILE_TYPE_DIRECTORY;
out_items[i].path[--out_items[i].path_len] = '\0';
} else
out_items[i].file_type = FILE_TYPE_NORMAL;
out_items[i].filter = curr_filter;
out_items[i].in_items = malloc(e->nrhs*sizeof(struct in_item));
struct rhs *r = e->r;
struct in_item *in_items = out_items[i].in_items;
int j = 0;
while(r) {
in_items[j].stratum_id = -1;
if (r->str[0] != '/') {
// The in_path might start with a stratum
// specification
char *colon = strchr(r->str, ':');
if (!colon || colon[1] != '/') {
// Invalid path, just ignore
r = r->next;
continue;
}
in_items[j].path = strdup(colon+1);
for (int st = 0; st < nstratum; st++)
if (strncmp(r->str, stratum[st], colon-r->str) == 0) {
in_items[j].stratum_id = st;
break;
}
if (in_items[j].stratum_id == -1) {
r = r->next;
continue;
}
} else
in_items[j].path = strdup(r->str);
in_items[j].path_len = strlen(in_items[j].path);
j++;
r = r->next;
}
out_items[i].in_item_count = j;
i++;
e = e->next;
}
sec_curr = sec_curr->next;
}
free_sections(sec);
}
void
elf_mod_symload(int strtablen)
{
Elf_Ehdr ehdr;
char *shstrtab;
struct elf_section *head, *s;
char *symbuf, *strbuf;
/*
* Seek to the text offset to start loading...
*/
if (lseek(modfd, 0, SEEK_SET) == -1)
err(12, "lseek");
if (read_elf_header(modfd, &ehdr) < 0)
return;
shstrtab = read_shstring_table(modfd, &ehdr);
read_sections(modfd, &ehdr, shstrtab, &head);
for (s = head; s; s = s->next) {
struct elf_section *p = s;
if ((p->type == SHT_SYMTAB) || (p->type == SHT_DYNSYM)) {
if (debug)
fprintf(stderr, "loading `%s': addr = %p, "
"size = %#lx\n",
s->name, s->addr, (u_long)s->size);
/*
* Seek to the file offset to start loading it...
*/
if (lseek(modfd, p->offset, SEEK_SET) == -1)
err(12, "lseek");
symbuf = malloc(p->size);
if (symbuf == 0)
err(13, "malloc");
if (read(modfd, symbuf, p->size) != p->size)
err(14, "read");
loadsym(symbuf, p->size);
free(symbuf);
}
}
for (s = head; s; s = s->next) {
struct elf_section *p = s;
if ((p->type == SHT_STRTAB) &&
(strcmp(p->name, ".strtab") == 0 )) {
if (debug)
fprintf(stderr, "loading `%s': addr = %p, "
"size = %#lx\n",
s->name, s->addr, (u_long)s->size);
/*
* Seek to the file offset to start loading it...
*/
if (lseek(modfd, p->offset, SEEK_SET) == -1)
err(12, "lseek");
strbuf = malloc(p->size);
if (strbuf == 0)
err(13, "malloc");
if (read(modfd, strbuf, p->size) != p->size)
err(14, "read");
loadsym(strbuf, p->size);
free(strbuf);
}
}
free(shstrtab);
free_sections(head);
return;
}
/* return size needed by the module */
int
elf_mod_sizes(int fd, size_t *modsize, int *strtablen,
struct lmc_resrv *resrvp, struct stat *sp)
{
Elf_Ehdr ehdr;
ssize_t off = 0;
size_t data_hole = 0;
char *shstrtab, *strtab;
struct elf_section *head, *s, *stab;
if (read_elf_header(fd, &ehdr) < 0)
return -1;
shstrtab = read_shstring_table(fd, &ehdr);
read_sections(fd, &ehdr, shstrtab, &head);
for (s = head; s; s = s->next) {
/* XXX impossible! */
if (s->type == SHT_STRTAB && s->type == SHT_SYMTAB &&
s->type == SHT_DYNSYM)
continue;
if (debug)
fprintf(stderr,
"%s: addr = %p size = %#lx align = %#lx\n",
s->name, s->addr, (u_long)s->size, (u_long)s->align);
/*
* XXX try to get rid of the hole before the data
* section that GNU-ld likes to put there
*/
if (strcmp(s->name, ".data") == 0 && s->addr > (void *)off) {
data_offset = roundup(off, s->align);
if (debug)
fprintf(stderr, ".data section forced to "
"offset %p (was %p)\n",
(void *)data_offset, s->addr);
/* later remove size of compressed hole from off */
data_hole = (ssize_t)s->addr - data_offset;
}
off = (ssize_t)s->addr + s->size;
}
off -= data_hole;
/* XXX round to pagesize? */
*modsize = roundup(off, sysconf(_SC_PAGESIZE));
/* get string table length */
strtab = read_string_table(fd, head, strtablen);
free(shstrtab);
free(strtab);
/* get symbol table sections */
get_symtab(&head);
stab = head;
resrvp->sym_symsize = 0;
while (stab) {
resrvp->sym_symsize += stab->size;
stab = stab->next;
}
resrvp->sym_size = resrvp->sym_symsize + *strtablen;
free_sections(head);
return (0);
}
/* 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;
}
int main(int argc, char **argv)
{
struct option long_options[] = {
{"wordy", no_argument, NULL, 'w'},
{"help", no_argument, NULL, 'h'},
};
struct epoll_event events[10];
int epoll_fd = -1;
struct itimerspec it;
int ret;
int status = EXIT_SUCCESS;
if (argc > 0)
progname = argv[0];
for (;;) {
int c;
c = getopt_long(argc, argv, "wh", long_options, NULL);
if (c == -1)
break;
switch (c) {
case 'w':
wordy = true;
break;
case 'h':
usage(false);
default:
usage(true);
}
}
if (optind != argc)
usage(true);
dpy = XOpenDisplay(NULL);
if (!dpy) {
fprintf(stderr, "unable to open display '%s'\n",
XDisplayName(NULL));
status = EXIT_FAILURE;
goto out;
}
root = DefaultRootWindow(dpy);
epoll_fd = epoll_create1(EPOLL_CLOEXEC);
if (epoll_fd == -1) {
perror("epoll_create1");
status = EXIT_FAILURE;
goto out;
}
ret = signal_fd_init(epoll_fd);
if (ret == -1) {
status = EXIT_FAILURE;
goto out;
}
ret = timer_fd_init(epoll_fd);
if (ret == -1) {
status = EXIT_FAILURE;
goto out;
}
ret = ctl_fd_init(epoll_fd);
if (ret == -1) {
status = EXIT_FAILURE;
goto out;
}
if (init_plugins()) {
status = EXIT_FAILURE;
goto out;
}
if (init_sections(epoll_fd, config, sizeof(config) / sizeof(*config))) {
status = EXIT_FAILURE;
goto out;
}
if (update_timer_sections()) {
status = EXIT_FAILURE;
goto out;
}
it.it_interval.tv_sec = 1;
it.it_interval.tv_nsec = 0;
it.it_value.tv_sec = 1;
it.it_value.tv_nsec = 0;
ret = timerfd_settime(timer_cb.fd, 0, &it, NULL);
if (ret == -1) {
perror("timerfd_settime");
status = EXIT_FAILURE;
goto out;
}
while (!quit) {
int i;
update = false;
ret = epoll_wait(epoll_fd, events,
sizeof(events) / sizeof(events[0]),
-1);
if (ret == -1) {
if (errno == EINTR)
continue;
perror("epoll_wait");
status = EXIT_FAILURE;
goto out;
}
for (i = 0; i < ret; i++) {
struct epoll_callback *cb = events[i].data.ptr;
ret = cb->callback(cb->fd, cb->data, events[i].events);
if (ret) {
status = EXIT_FAILURE;
goto out;
}
}
if (update) {
ret = update_statusbar();
if (ret) {
status = EXIT_FAILURE;
goto out;
}
}
}
status = EXIT_SUCCESS;
out:
if (epoll_fd != -1)
close(epoll_fd);
free_sections();
if (ctl_cb.fd != -1) {
close(ctl_cb.fd);
unlink(ctl_addr.sun_path);
}
if (timer_cb.fd != -1)
close(timer_cb.fd);
if (signal_cb.fd != -1)
close(signal_cb.fd);
str_free(&status_str);
if (dpy) {
XStoreName(dpy, root, "");
XFlush(dpy);
XCloseDisplay(dpy);
}
return status;
}