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#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <string.h>
#include <fcntl.h>
#include <sys/wait.h>
#include "zdtmtst.h"
const char *test_doc = "Check that root didn't change";
const char *test_author = "Pavel Emelianov <xemul@parallels.com>";
char *dirname;
TEST_OPTION(dirname, string, "directory name", 1);
char *filename;
TEST_OPTION(filename, string, "file name", 1);
static char *filepath;
#define MSG "chroot-file-contents"
static int make_file(char *name)
{
int fd;
fd = open(name, O_RDWR | O_CREAT, 0666);
if (fd < 0)
return -1;
if (write(fd, MSG, sizeof(MSG)) != sizeof(MSG))
return -1;
return fd;
}
static int check_file(int fd)
{
char r[sizeof(MSG)];
lseek(fd, 0, SEEK_SET);
if (read(fd, r, sizeof(r)) != sizeof(MSG))
return -1;
if (memcmp(r, MSG, sizeof(MSG)))
return -1;
return 0;
}
#define SUCCESS 0
#define ERR_PIPES (char)0x7f
/* bitmap of errors */
#define ERR_IN_FILE 1
#define ERR_ROOT 2
#define ERR_DIR 4
#define ERR_OPEN 2
#define ERR_FILE2 4
int main(int argc, char **argv)
{
int pid, pipe_prep[2], pipe_goon[2], pipe_res[2];
char res;
int fd, fd2;
test_init(argc, argv);
filepath = malloc(strlen(filename) + 2);
sprintf(filepath, "/%s", filename);
pipe(pipe_prep);
pipe(pipe_goon);
pipe(pipe_res);
pid = test_fork();
if (pid != 0) {
close(pipe_prep[1]);
close(pipe_goon[0]);
close(pipe_res[1]);
res = ERR_PIPES;
read(pipe_prep[0], &res, 1);
read(pipe_prep[0], &res, 1); /* wait when pipe_prep[] will be closed */
if (res != SUCCESS) {
if (res == ERR_PIPES)
pr_perror("broken pipes");
else {
if (res & ERR_IN_FILE)
pr_perror("inside-root file fail");
if (res & ERR_ROOT)
pr_perror("chroot fail");
if (res & ERR_DIR)
pr_perror("mkdir fail");
}
return 0;
}
test_daemon();
test_waitsig();
close(pipe_goon[1]);
res = ERR_PIPES;
read(pipe_res[0], &res, 1);
if (res == SUCCESS)
pass();
else if (res == ERR_PIPES)
fail("broken pipes");
else {
if (res & ERR_IN_FILE)
fail("opened file broken");
if (res & ERR_OPEN)
fail("open in chroot fail");
if (res & ERR_FILE2)
fail("wrong file opened");
}
wait(NULL);
return 0;
}
close(pipe_prep[0]);
close(pipe_goon[1]);
close(pipe_res[0]);
if (mkdir(dirname, 0700)) {
res = ERR_DIR;
goto err_nodir;
}
if (chroot(dirname)) {
res = ERR_ROOT;
goto err_noroot;
}
fd = make_file(filepath);
if (fd < 0) {
res = ERR_IN_FILE;
goto err_nofile2;
}
res = SUCCESS;
write(pipe_prep[1], &res, 1);
close(pipe_prep[1]);
read(pipe_goon[0], &res, 1);
res = SUCCESS;
if (check_file(fd))
res |= ERR_IN_FILE;
fd2 = open(filepath, O_RDWR);
if (fd2 < 0)
res |= ERR_OPEN;
else if (check_file(fd2))
res |= ERR_FILE2;
write(pipe_res[1], &res, 1);
exit(0);
err_nofile2:
err_noroot:
err_nodir:
write(pipe_prep[1], &res, 1);
exit(0);
}
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