You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
94 lines
3.2 KiB
94 lines
3.2 KiB
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
/*
|
|
BSD 3-Clause License
|
|
|
|
Copyright (c) 2021, Ruthenic
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice, this
|
|
list of conditions and the following disclaimer.
|
|
|
|
2. Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
|
|
3. Neither the name of the copyright holder nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
chroot - changes root directory for a specified process
|
|
available arguments:
|
|
--help - prints this help message
|
|
--version - prints version information
|
|
-c <executable> - runs the specified executable in the new root directory
|
|
instead of the default
|
|
|
|
usage:
|
|
chroot [OPTIONS] [DIRECTORY]
|
|
*/
|
|
int runChroot(char *executable, char *directory) {
|
|
if (chdir(directory) == -1) {
|
|
perror("chdir");
|
|
return 1;
|
|
} else if (chroot(".") == -1) {
|
|
perror("chroot");
|
|
return 1;
|
|
} else if (execvp(executable, NULL) == -1) {
|
|
perror("execvp");
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int chr(int argc, char *argv[]) {
|
|
int i;
|
|
char *executable = "/bin/sh";
|
|
char *directory = argv[argc - 1];
|
|
for (i = 1; i < argc; i++) {
|
|
if (strcmp(argv[i], "--help") == 0) {
|
|
printf("chroot - changes root directory for a specified process\n");
|
|
printf("available arguments:\n");
|
|
printf(" --help - prints this help message\n");
|
|
printf(" --version - prints version information\n");
|
|
printf(" -c <executable> - runs the specified executable in the new "
|
|
"root directory instead of '/bin/sh'\n");
|
|
printf("instead of the default\n");
|
|
printf("usage:\n");
|
|
printf(" chroot [OPTIONS] [DIRECTORY]\n");
|
|
return 0;
|
|
} else if (strcmp(argv[i], "--version") == 0) {
|
|
printf("%s\n", DRAKECU_VERSION);
|
|
return 0;
|
|
} else if (strcmp(argv[i], "-c") == 0) {
|
|
if (i + 1 < argc) {
|
|
executable = argv[++i];
|
|
} else {
|
|
printf("chroot: option requires an argument -- '-c'\n");
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
return runChroot(executable, directory);
|
|
}
|