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/*
* This file is part of execveat strace test.
*
* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2015-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#ifdef __NR_execveat
# include <fcntl.h>
# include <stdio.h>
# include <unistd.h>
# include "secontext.h"
static void
tests_with_existing_file(void)
{
/*
* Make sure the current workdir of the tracee
* is different from the current workdir of the tracer.
*/
create_and_enter_subdir("execveat_subdir");
char *my_secontext = SECONTEXT_PID_MY();
static const char sample[] = "execveat_sample";
(void) unlink(sample);
if (open(sample, O_RDONLY | O_CREAT, 0400) < 0)
perror_msg_and_fail("open");
char *sample_secontext = SECONTEXT_FILE(sample);
static const char *argv[] = { sample, NULL };
/*
* Tests with AT_FDCWD.
*/
long rc = syscall(__NR_execveat, -100, sample, argv, NULL, 0);
printf("%s%s(AT_FDCWD, \"%s\"%s, [\"%s\"], NULL, 0) = %s\n",
my_secontext, "execveat",
sample, sample_secontext,
argv[0],
sprintrc(rc));
if (unlink(sample))
perror_msg_and_fail("unlink");
rc = syscall(__NR_execveat, -100, sample, argv, NULL, 0);
printf("%s%s(AT_FDCWD, \"%s\", [\"%s\"], NULL, 0) = %s\n",
my_secontext, "execveat",
sample,
argv[0],
sprintrc(rc));
/*
* Tests with dirfd.
*/
int cwd_fd = get_dir_fd(".");
char *cwd = get_fd_path(cwd_fd);
char *cwd_secontext = SECONTEXT_FILE(".");
char *sample_realpath = xasprintf("%s/%s", cwd, sample);
/* no file */
rc = syscall(__NR_execveat, cwd_fd, sample, argv, NULL, 0);
printf("%s%s(%d%s, \"%s\", [\"%s\"], NULL, 0) = %s\n",
my_secontext, "execveat",
cwd_fd, cwd_secontext,
sample,
argv[0],
sprintrc(rc));
if (open(sample, O_RDONLY | O_CREAT, 0400) < 0)
perror_msg_and_fail("open");
rc = syscall(__NR_execveat, cwd_fd, sample, argv, NULL, 0);
printf("%s%s(%d%s, \"%s\"%s, [\"%s\"], NULL, 0) = %s\n",
my_secontext, "execveat",
cwd_fd, cwd_secontext,
sample, sample_secontext,
argv[0],
sprintrc(rc));
/* cwd_fd ignored when path is absolute */
if (chdir("../.."))
perror_msg_and_fail("chdir");
rc = syscall(__NR_execveat, cwd_fd, sample_realpath, argv, NULL, 0);
printf("%s%s(%d%s, \"%s\"%s, [\"%s\"], NULL, 0) = %s\n",
my_secontext, "execveat",
cwd_fd, cwd_secontext,
sample_realpath, sample_secontext,
argv[0],
sprintrc(rc));
if (fchdir(cwd_fd))
perror_msg_and_fail("fchdir");
if (unlink(sample))
perror_msg_and_fail("unlink");
leave_and_remove_subdir();
}
# define FILENAME "test.execveat\nfilename"
# define Q_FILENAME "test.execveat\\nfilename"
static const char * const argv[] = {
FILENAME, "first", "second", (const char *) -1L,
(const char *) -2L, (const char *) -3L
};
static const char * const q_argv[] = {
Q_FILENAME, "first", "second"
};
static const char * const envp[] = {
"foobar=1", "foo\nbar=2", (const char *) -1L,
(const char *) -2L, (const char *) -3L
};
static const char * const q_envp[] = {
"foobar=1", "foo\\nbar=2"
};
int
main(void)
{
const char ** const tail_argv = tail_memdup(argv, sizeof(argv));
const char ** const tail_envp = tail_memdup(envp, sizeof(envp));
char *my_secontext = SECONTEXT_PID_MY();
syscall(__NR_execveat, -100, FILENAME, tail_argv, tail_envp, 0x1100);
printf("%s%s(AT_FDCWD, \"%s\""
", [\"%s\", \"%s\", \"%s\", %p, %p, %p, ... /* %p */]"
# if VERBOSE
", [\"%s\", \"%s\", %p, %p, %p, ... /* %p */]"
# else
", %p /* 5 vars, unterminated */"
# endif
", AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) = -1 %s (%m)\n",
my_secontext, "execveat",
Q_FILENAME, q_argv[0], q_argv[1], q_argv[2],
argv[3], argv[4], argv[5], (char *) tail_argv + sizeof(argv),
# if VERBOSE
q_envp[0], q_envp[1], envp[2], envp[3], envp[4],
(char *) tail_envp + sizeof(envp),
# else
tail_envp,
# endif
errno2name());
tail_argv[ARRAY_SIZE(q_argv)] = NULL;
tail_envp[ARRAY_SIZE(q_envp)] = NULL;
(void) q_envp; /* workaround for clang bug #33068 */
syscall(__NR_execveat, -100, FILENAME, tail_argv, tail_envp, 0x1100);
printf("%s%s(AT_FDCWD, \"%s\", [\"%s\", \"%s\", \"%s\"]"
# if VERBOSE
", [\"%s\", \"%s\"]"
# else
", %p /* 2 vars */"
# endif
", AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) = -1 %s (%m)\n",
my_secontext, "execveat",
Q_FILENAME, q_argv[0], q_argv[1], q_argv[2],
# if VERBOSE
q_envp[0], q_envp[1],
# else
tail_envp,
# endif
errno2name());
syscall(__NR_execveat, -100, FILENAME, tail_argv + 2, tail_envp + 1, 0x1100);
printf("%s%s(AT_FDCWD, \"%s\", [\"%s\"]"
# if VERBOSE
", [\"%s\"]"
# else
", %p /* 1 var */"
# endif
", AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) = -1 %s (%m)\n",
my_secontext, "execveat",
Q_FILENAME, q_argv[2],
# if VERBOSE
q_envp[1],
# else
tail_envp + 1,
# endif
errno2name());
TAIL_ALLOC_OBJECT_CONST_PTR(char *, empty);
char **const efault = empty + 1;
*empty = NULL;
syscall(__NR_execveat, -100, FILENAME, empty, empty, 0x1100);
printf("%s%s(AT_FDCWD, \"%s\", []"
# if VERBOSE
", []"
# else
", %p /* 0 vars */"
# endif
", AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) = -1 %s (%m)\n",
my_secontext, "execveat",
Q_FILENAME,
# if !VERBOSE
empty,
# endif
errno2name());
char *const str_a = tail_alloc(DEFAULT_STRLEN + 2);
fill_memory_ex(str_a, DEFAULT_STRLEN + 1, '0', 10);
str_a[DEFAULT_STRLEN + 1] = '\0';
char *const str_b = tail_alloc(DEFAULT_STRLEN + 2);
fill_memory_ex(str_b, DEFAULT_STRLEN + 1, '_', 32);
str_b[DEFAULT_STRLEN + 1] = '\0';
char **const a = tail_alloc(sizeof(*a) * (DEFAULT_STRLEN + 2));
char **const b = tail_alloc(sizeof(*b) * (DEFAULT_STRLEN + 2));
unsigned int i;
for (i = 0; i <= DEFAULT_STRLEN; ++i) {
a[i] = &str_a[i];
b[i] = &str_b[i];
}
a[i] = b[i] = NULL;
syscall(__NR_execveat, -100, FILENAME, a, b, 0x1100);
printf("%s%s(AT_FDCWD, \"%s\", [\"%.*s\"...",
my_secontext, "execveat",
Q_FILENAME, DEFAULT_STRLEN, a[0]);
for (i = 1; i < DEFAULT_STRLEN; ++i)
printf(", \"%s\"", a[i]);
# if VERBOSE
printf(", \"%s\"", a[i]);
# else
printf(", ...");
# endif
# if VERBOSE
printf("], [\"%.*s\"...", DEFAULT_STRLEN, b[0]);
for (i = 1; i <= DEFAULT_STRLEN; ++i)
printf(", \"%s\"", b[i]);
printf("]");
# else
printf("], %p /* %u vars */", b, DEFAULT_STRLEN + 1);
# endif
printf(", AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) = -1 %s (%m)\n",
errno2name());
syscall(__NR_execveat, -100, FILENAME, a + 1, b + 1, 0x1100);
printf("%s%s(AT_FDCWD, \"%s\", [\"%s\"",
my_secontext, "execveat",
Q_FILENAME, a[1]);
for (i = 2; i <= DEFAULT_STRLEN; ++i)
printf(", \"%s\"", a[i]);
# if VERBOSE
printf("], [\"%s\"", b[1]);
for (i = 2; i <= DEFAULT_STRLEN; ++i)
printf(", \"%s\"", b[i]);
printf("]");
# else
printf("], %p /* %d vars */", b + 1, DEFAULT_STRLEN);
# endif
printf(", AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) = -1 %s (%m)\n",
errno2name());
syscall(__NR_execveat, -100, FILENAME, NULL, efault, 0x1100);
printf("%s%s(AT_FDCWD, \"%s\", NULL, %p"
", AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) = -1 %s (%m)\n",
my_secontext, "execveat",
Q_FILENAME, efault, errno2name());
syscall(__NR_execveat, -100, FILENAME, efault, NULL, 0x1100);
printf("%s%s(AT_FDCWD, \"%s\", %p, NULL"
", AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) = -1 %s (%m)\n",
my_secontext, "execveat",
Q_FILENAME, efault, errno2name());
tests_with_existing_file();
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_execveat")
#endif
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