mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
110 lines
2.4 KiB
C
110 lines
2.4 KiB
C
/*
|
|
* ----------------------------------------------------------------------------
|
|
* "THE BEER-WARE LICENSE" (Revision 42):
|
|
* <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
|
|
* can do whatever you want with this stuff. If we meet some day, and you think
|
|
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
|
|
* ----------------------------------------------------------------------------
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/jail.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <err.h>
|
|
#include <grp.h>
|
|
#include <login_cap.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
static void usage(void);
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
login_cap_t *lcap;
|
|
struct jail j;
|
|
struct passwd *pwd;
|
|
struct in_addr in;
|
|
int ch, groups[NGROUPS], i, iflag, ngroups;
|
|
char *username;
|
|
|
|
iflag = 0;
|
|
username = NULL;
|
|
|
|
while ((ch = getopt(argc, argv, "iu:")) != -1) {
|
|
switch (ch) {
|
|
case 'i':
|
|
iflag = 1;
|
|
break;
|
|
case 'u':
|
|
username = optarg;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
if (argc < 4)
|
|
usage();
|
|
|
|
if (username != NULL) {
|
|
pwd = getpwnam(username);
|
|
if (pwd == NULL)
|
|
err(1, "getpwnam: %s", username);
|
|
lcap = login_getpwclass(pwd);
|
|
if (lcap == NULL)
|
|
err(1, "getpwclass: %s", username);
|
|
ngroups = NGROUPS;
|
|
if (getgrouplist(username, pwd->pw_gid, groups, &ngroups) != 0)
|
|
err(1, "getgrouplist: %s", username);
|
|
}
|
|
if (chdir(argv[0]) != 0)
|
|
err(1, "chdir: %s", argv[0]);
|
|
memset(&j, 0, sizeof(j));
|
|
j.version = 0;
|
|
j.path = argv[0];
|
|
j.hostname = argv[1];
|
|
if (inet_aton(argv[2], &in) == 0)
|
|
errx(1, "Could not make sense of ip-number: %s", argv[2]);
|
|
j.ip_number = ntohl(in.s_addr);
|
|
i = jail(&j);
|
|
if (i == -1)
|
|
err(1, "jail");
|
|
if (iflag) {
|
|
printf("%d\n", i);
|
|
fflush(stdout);
|
|
}
|
|
if (username != NULL) {
|
|
if (setgroups(ngroups, groups) != 0)
|
|
err(1, "setgroups");
|
|
if (setgid(pwd->pw_gid) != 0)
|
|
err(1, "setgid");
|
|
if (setusercontext(lcap, pwd, pwd->pw_uid,
|
|
LOGIN_SETALL & ~LOGIN_SETGROUP) != 0)
|
|
err(1, "setusercontext");
|
|
login_close(lcap);
|
|
}
|
|
if (execv(argv[3], argv + 3) != 0)
|
|
err(1, "execv: %s", argv[3]);
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: jail [-i] [-u username] path hostname ip-number command ...\n");
|
|
exit(1);
|
|
}
|