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/*
* Copyright (C) 2014-2021 Firejail Authors
*
* This file is part of firejail project
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "firejail.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
static void ids_init(void) {
// store checksums as root in /var/lib/firejail/${USERNAME}.ids
char *fname;
if (asprintf(&fname, VARDIR"/%s.ids", cfg.username) == -1)
errExit("asprintf");
int rv = unlink(fname);
(void) rv;
int fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0600);
if (fd < 0) {
fprintf(stderr, "Error: cannot create %s\n", fname);
exit(1);
}
// redirect output
close(STDOUT_FILENO);
if (dup(fd) != STDOUT_FILENO)
errExit("dup");
close(fd);
sbox_run(SBOX_USER | SBOX_CAPS_NONE | SBOX_SECCOMP, 3, PATH_FIDS, "--init", cfg.homedir);
}
static void ids_check(void) {
// store checksums as root in /var/lib/firejail/${USERNAME}.ids
char *fname;
if (asprintf(&fname, VARDIR"/%s.ids", cfg.username) == -1)
errExit("asprintf");
int fd = open(fname, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "Error: cannot open %s\n", fname);
exit(1);
}
// redirect input
close(STDIN_FILENO);
if (dup(fd) != STDIN_FILENO)
errExit("dup");
close(fd);
sbox_run(SBOX_USER | SBOX_CAPS_NONE | SBOX_SECCOMP| SBOX_ALLOW_STDIN, 3, PATH_FIDS, "--check", cfg.homedir);
}
void run_ids(int argc, char **argv) {
if (argc != 2) {
fprintf(stderr, "Error: only one IDS command expected\n");
exit(1);
}
EUID_ROOT();
struct stat s;
if (stat(VARDIR, &s)) // /var/lib/firejail
create_empty_dir_as_root(VARDIR, 0700);
if (strcmp(argv[1], "--ids-init") == 0)
ids_init();
else if (strcmp(argv[1], "--ids-check") == 0)
ids_check();
else
fprintf(stderr, "Error: unrecognized IDS command\n");
exit(0);
}
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