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// SPDX-License-Identifier: GPL-2.0+
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <sys/types.h>
#include "../kselftest_harness.h"
/* Remove a file, ignoring the result if it didn't exist. */
void rm(struct __test_metadata *_metadata, const char *pathname,
int is_dir)
{
int rc;
if (is_dir)
rc = rmdir(pathname);
else
rc = unlink(pathname);
if (rc < 0) {
ASSERT_EQ(errno, ENOENT) {
TH_LOG("Not ENOENT: %s", pathname);
}
} else {
ASSERT_EQ(rc, 0) {
TH_LOG("Failed to remove: %s", pathname);
}
}
}
FIXTURE(file) {
char *pathname;
int is_dir;
};
FIXTURE_VARIANT(file)
{
const char *name;
int expected;
int is_dir;
void (*setup)(struct __test_metadata *_metadata,
FIXTURE_DATA(file) *self,
const FIXTURE_VARIANT(file) *variant);
int major, minor, mode; /* for mknod() */
};
void setup_link(struct __test_metadata *_metadata,
FIXTURE_DATA(file) *self,
const FIXTURE_VARIANT(file) *variant)
{
const char * const paths[] = {
"/bin/true",
"/usr/bin/true",
};
int i;
for (i = 0; i < ARRAY_SIZE(paths); i++) {
if (access(paths[i], X_OK) == 0) {
ASSERT_EQ(symlink(paths[i], self->pathname), 0);
return;
}
}
ASSERT_EQ(1, 0) {
TH_LOG("Could not find viable 'true' binary");
}
}
FIXTURE_VARIANT_ADD(file, S_IFLNK)
{
.name = "S_IFLNK",
.expected = ELOOP,
.setup = setup_link,
};
void setup_dir(struct __test_metadata *_metadata,
FIXTURE_DATA(file) *self,
const FIXTURE_VARIANT(file) *variant)
{
ASSERT_EQ(mkdir(self->pathname, 0755), 0);
}
FIXTURE_VARIANT_ADD(file, S_IFDIR)
{
.name = "S_IFDIR",
.is_dir = 1,
.expected = EACCES,
.setup = setup_dir,
};
void setup_node(struct __test_metadata *_metadata,
FIXTURE_DATA(file) *self,
const FIXTURE_VARIANT(file) *variant)
{
dev_t dev;
int rc;
dev = makedev(variant->major, variant->minor);
rc = mknod(self->pathname, 0755 | variant->mode, dev);
ASSERT_EQ(rc, 0) {
if (errno == EPERM)
SKIP(return, "Please run as root; cannot mknod(%s)",
variant->name);
}
}
FIXTURE_VARIANT_ADD(file, S_IFBLK)
{
.name = "S_IFBLK",
.expected = EACCES,
.setup = setup_node,
/* /dev/loop0 */
.major = 7,
.minor = 0,
.mode = S_IFBLK,
};
FIXTURE_VARIANT_ADD(file, S_IFCHR)
{
.name = "S_IFCHR",
.expected = EACCES,
.setup = setup_node,
/* /dev/zero */
.major = 1,
.minor = 5,
.mode = S_IFCHR,
};
void setup_fifo(struct __test_metadata *_metadata,
FIXTURE_DATA(file) *self,
const FIXTURE_VARIANT(file) *variant)
{
ASSERT_EQ(mkfifo(self->pathname, 0755), 0);
}
FIXTURE_VARIANT_ADD(file, S_IFIFO)
{
.name = "S_IFIFO",
.expected = EACCES,
.setup = setup_fifo,
};
FIXTURE_SETUP(file)
{
ASSERT_GT(asprintf(&self->pathname, "%s.test", variant->name), 6);
self->is_dir = variant->is_dir;
rm(_metadata, self->pathname, variant->is_dir);
variant->setup(_metadata, self, variant);
}
FIXTURE_TEARDOWN(file)
{
rm(_metadata, self->pathname, self->is_dir);
}
TEST_F(file, exec_errno)
{
char * const argv[2] = { (char * const)self->pathname, NULL };
EXPECT_LT(execv(argv[0], argv), 0);
EXPECT_EQ(errno, variant->expected);
}
/* S_IFSOCK */
FIXTURE(sock)
{
int fd;
};
FIXTURE_SETUP(sock)
{
self->fd = socket(AF_INET, SOCK_STREAM, 0);
ASSERT_GE(self->fd, 0);
}
FIXTURE_TEARDOWN(sock)
{
if (self->fd >= 0)
ASSERT_EQ(close(self->fd), 0);
}
TEST_F(sock, exec_errno)
{
char * const argv[2] = { " magic socket ", NULL };
char * const envp[1] = { NULL };
EXPECT_LT(fexecve(self->fd, argv, envp), 0);
EXPECT_EQ(errno, EACCES);
}
TEST_HARNESS_MAIN
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