#include <stdlib.h>
#include <unistd.h>
-#include <values.h>
#include <errno.h>
-#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <libgen.h>
#include <sched.h>
+#include <linux/limits.h>
-#include "elf.h"
#include "capabilities.h"
+#include "elf.h"
+#include "fs.h"
+#include "jail.h"
+#include "log.h"
-#include <libubox/list.h>
#include <libubox/uloop.h>
#define STACK_SIZE (1024 * 1024)
int sysfs;
} opts;
-struct extra {
- struct list_head list;
-
- const char *path;
- const char *name;
- int readonly;
-};
-
-static LIST_HEAD(extras);
-
extern int pivot_root(const char *new_root, const char *put_old);
int debug = 0;
return ret;
}
-static int mount_bind(const char *root, const char *path, const char *name, int readonly, int error)
+int mount_bind(const char *root, const char *path, int readonly, int error)
{
- const char *p = path;
struct stat s;
- char old[256];
- char new[256];
+ char new[PATH_MAX];
int fd;
- if (strstr(p, "local"))
- p = "/lib";
-
- snprintf(old, sizeof(old), "%s/%s", path, name);
- snprintf(new, sizeof(new), "%s%s", root, p);
-
- mkdir_p(new, 0755);
-
- snprintf(new, sizeof(new), "%s%s/%s", root, p, name);
-
- if (stat(old, &s)) {
- ERROR("%s does not exist\n", old);
+ if (stat(path, &s)) {
+ ERROR("stat(%s) failed: %s\n", path, strerror(errno));
return error;
}
+ snprintf(new, sizeof(new), "%s%s", root, path);
if (S_ISDIR(s.st_mode)) {
mkdir_p(new, 0755);
} else {
+ mkdir_p(dirname(new), 0755);
+ snprintf(new, sizeof(new), "%s%s", root, path);
fd = creat(new, 0644);
if (fd == -1) {
ERROR("failed to create %s: %s\n", new, strerror(errno));
close(fd);
}
- if (mount(old, new, NULL, MS_BIND, NULL)) {
- ERROR("failed to mount -B %s %s: %s\n", old, new, strerror(errno));
+ if (mount(path, new, NULL, MS_BIND, NULL)) {
+ ERROR("failed to mount -B %s %s: %s\n", path, new, strerror(errno));
return -1;
}
return -1;
}
- DEBUG("mount -B %s %s\n", old, new);
+ DEBUG("mount -B %s %s\n", path, new);
return 0;
}
-static int build_jail_fs()
+static int build_jail_fs(void)
{
- struct library *l;
- struct extra *m;
-
if (mount("tmpfs", opts.path, "tmpfs", MS_NOATIME, "mode=0755")) {
ERROR("tmpfs mount failed %s\n", strerror(errno));
return -1;
return -1;
}
- avl_init(&libraries, avl_strcmp, false, NULL);
- alloc_library_path("/lib64");
- alloc_library_path("/lib");
- alloc_library_path("/usr/lib");
- load_ldso_conf("/etc/ld.so.conf");
-
- if (elf_load_deps(*opts.jail_argv)) {
+ if (add_path_and_deps(*opts.jail_argv, 1, -1, 0)) {
ERROR("failed to load dependencies\n");
return -1;
}
- if (opts.seccomp && elf_load_deps("libpreload-seccomp.so")) {
+ if (opts.seccomp && add_path_and_deps("libpreload-seccomp.so", 1, -1, 1)) {
ERROR("failed to load libpreload-seccomp.so\n");
return -1;
}
- avl_for_each_element(&libraries, l, avl)
- if (mount_bind(opts.path, l->path, l->name, 1, -1))
- return -1;
-
- list_for_each_entry(m, &extras, list)
- if (mount_bind(opts.path, m->path, m->name, m->readonly, 0))
- return -1;
+ if (mount_all(opts.path)) {
+ ERROR("mount_all() failed\n");
+ return -1;
+ }
char *mpoint;
if (asprintf(&mpoint, "%s/old", opts.path) < 0) {
static char** build_envp(const char *seccomp)
{
static char *envp[MAX_ENVP];
- static char preload_var[64];
- static char seccomp_var[64];
+ static char preload_var[PATH_MAX];
+ static char seccomp_var[PATH_MAX];
static char debug_var[] = "LD_DEBUG=all";
- char *preload_lib = find_lib("libpreload-seccomp.so");
+ const char *preload_lib = find_lib("libpreload-seccomp.so");
int count = 0;
if (seccomp && !preload_lib) {
and will only drop capabilities/apply seccomp filter.\n\n");
}
-static int exec_jail()
+static int exec_jail(void)
{
char **envp = build_envp(opts.seccomp);
if (!envp)
INFO("exec-ing %s\n", *opts.jail_argv);
execve(*opts.jail_argv, opts.jail_argv, envp);
- //we get there only if execve fails
+ /* we get there only if execve fails */
ERROR("failed to execve %s: %s\n", *opts.jail_argv, strerror(errno));
exit(EXIT_FAILURE);
}
.cb = jail_process_handler,
};
-static void add_extra(char *name, int readonly)
-{
- struct extra *f;
-
- if (*name != '/') {
- ERROR("%s is not an absolute path\n", name);
- return;
- }
-
- f = calloc(1, sizeof(struct extra));
-
- f->name = basename(name);
- f->path = dirname(strdup(name));
- f->readonly = readonly;
-
- list_add_tail(&f->list, &extras);
-}
-
int main(int argc, char **argv)
{
uid_t uid = getuid();
}
umask(022);
+ mount_list_init();
+ init_library_search();
while ((ch = getopt(argc, argv, OPT_ARGS)) != -1) {
switch (ch) {
break;
case 'S':
opts.seccomp = optarg;
- add_extra(optarg, 1);
+ add_mount(optarg, 1, -1);
break;
case 'C':
opts.capabilities = optarg;
- add_extra(optarg, 1);
+ add_mount(optarg, 1, -1);
break;
case 'P':
opts.namespace = 1;
break;
case 'r':
opts.namespace = 1;
- add_extra(optarg, 1);
+ add_path_and_deps(optarg, 1, 0, 0);
break;
case 'w':
opts.namespace = 1;
- add_extra(optarg, 0);
+ add_path_and_deps(optarg, 0, 0, 0);
break;
case 'u':
opts.namespace = 1;
- add_extra(ubus, 0);
+ add_mount(ubus, 0, -1);
break;
case 'l':
opts.namespace = 1;
- add_extra(log, 0);
+ add_mount(log, 0, -1);
break;
}
}
- //no <binary> param found
+ /* no <binary> param found */
if (argc - optind < 1) {
usage();
return EXIT_FAILURE;
}
if (jail_process.pid > 0) {
- //parent process
+ /* parent process */
uloop_process_add(&jail_process);
uloop_run();
uloop_done();
waitpid(jail_process.pid, NULL, 0);
}
} else if (jail_process.pid == 0) {
- //fork child process
+ /* fork child process */
return exec_jail();
} else {
ERROR("failed to clone/fork: %s\n", strerror(errno));
projects / project / procd.git / blobdiff