int main(int argc, char *argv[]) { _cleanup_free_ char *bus_name = NULL, *address = NULL; uint8_t *p; sd_bus *a, *b; int r, bus_ref; sd_bus_message *m; sd_memfd *f; uint64_t sz; uint32_t u32; size_t i, l; char *s; log_set_max_level(LOG_DEBUG); bus_ref = bus_kernel_create("deine-mutter", &bus_name); if (bus_ref == -ENOENT) return EXIT_TEST_SKIP; assert_se(bus_ref >= 0); address = strappend("kernel:path=", bus_name); assert_se(address); r = sd_bus_new(&a); assert_se(r >= 0); r = sd_bus_new(&b); assert_se(r >= 0); r = sd_bus_set_address(a, address); assert_se(r >= 0); r = sd_bus_set_address(b, address); assert_se(r >= 0); r = sd_bus_start(a); assert_se(r >= 0); r = sd_bus_start(b); assert_se(r >= 0); r = sd_bus_message_new_method_call(b, ":1.1", "/a/path", "an.inter.face", "AMethod", &m); assert_se(r >= 0); r = sd_bus_message_open_container(m, 'r', "aysay"); assert_se(r >= 0); r = sd_bus_message_append_array_space(m, 'y', FIRST_ARRAY, (void**) &p); assert_se(r >= 0); memset(p, 'L', FIRST_ARRAY); r = sd_memfd_new_and_map(&f, STRING_SIZE, (void**) &s); assert_se(r >= 0); for (i = 0; i < STRING_SIZE-1; i++) s[i] = '0' + (i % 10); s[STRING_SIZE-1] = 0; munmap(s, STRING_SIZE); r = sd_memfd_get_size(f, &sz); assert_se(r >= 0); assert_se(sz == STRING_SIZE); r = sd_bus_message_append_string_memfd(m, f); assert_se(r >= 0); sd_memfd_free(f); r = sd_memfd_new_and_map(&f, SECOND_ARRAY, (void**) &p); assert_se(r >= 0); memset(p, 'P', SECOND_ARRAY); munmap(p, SECOND_ARRAY); r = sd_memfd_get_size(f, &sz); assert_se(r >= 0); assert_se(sz == SECOND_ARRAY); r = sd_bus_message_append_array_memfd(m, 'y', f); assert_se(r >= 0); sd_memfd_free(f); r = sd_bus_message_close_container(m); assert_se(r >= 0); r = sd_bus_message_append(m, "u", 4711); assert_se(r >= 0); r = bus_message_seal(m, 55); assert_se(r >= 0); bus_message_dump(m, stdout, true); r = sd_bus_send(b, m, NULL); assert_se(r >= 0); sd_bus_message_unref(m); r = sd_bus_process(a, &m); assert_se(r > 0); bus_message_dump(m, stdout, true); sd_bus_message_rewind(m, true); r = sd_bus_message_enter_container(m, 'r', "aysay"); assert_se(r > 0); r = sd_bus_message_read_array(m, 'y', (const void**) &p, &l); assert_se(r > 0); assert_se(l == FIRST_ARRAY); for (i = 0; i < l; i++) assert_se(p[i] == 'L'); r = sd_bus_message_read(m, "s", &s); assert_se(r > 0); for (i = 0; i < STRING_SIZE-1; i++) assert_se(s[i] == (char) ('0' + (i % 10))); assert_se(s[STRING_SIZE-1] == 0); r = sd_bus_message_read_array(m, 'y', (const void**) &p, &l); assert_se(r > 0); assert_se(l == SECOND_ARRAY); for (i = 0; i < l; i++) assert_se(p[i] == 'P'); r = sd_bus_message_exit_container(m); assert_se(r > 0); r = sd_bus_message_read(m, "u", &u32); assert_se(r > 0); assert_se(u32 == 4711); sd_bus_message_unref(m); sd_bus_unref(a); sd_bus_unref(b); return 0; }
int main(int argc, char *argv[]) { sd_memfd *m; char *s, *name; uint64_t sz; int r, fd; FILE *f; char buf[3] = {}; struct iovec iov[3] = {}; char bufv[3][3] = {}; log_set_max_level(LOG_DEBUG); r = sd_memfd_new(NULL, &m); if (r == -ENOENT) return EXIT_TEST_SKIP; assert_se(r >= 0); assert_se(sd_memfd_get_name(m, &name) >= 0); log_info("name: %s", name); free(name); r = sd_memfd_map(m, 0, 12, (void**) &s); assert_se(r >= 0); strcpy(s, "----- world"); r = sd_memfd_set_sealed(m, 1); assert_se(r == -ETXTBSY); assert_se(write(sd_memfd_get_fd(m), "he", 2) == 2); assert_se(write(sd_memfd_get_fd(m), "XXX", 3) == 3); assert_se(streq(s, "heXXX world")); /* fix "hello" */ assert_se(lseek(sd_memfd_get_fd(m), 2, SEEK_SET) == 2); assert_se(write(sd_memfd_get_fd(m), "ll", 2) == 2); assert_se(sd_memfd_get_file(m, &f) >= 0); fputc('o', f); fflush(f); /* check content */ assert_se(streq(s, "hello world")); assert_se(munmap(s, 12) == 0); r = sd_memfd_get_sealed(m); assert_se(r == 0); r = sd_memfd_get_size(m, &sz); assert_se(r >= 0); assert_se(sz = page_size()); /* truncate it */ r = sd_memfd_set_size(m, 6); assert_se(r >= 0); /* get back new value */ r = sd_memfd_get_size(m, &sz); assert_se(r >= 0); assert_se(sz == 6); r = sd_memfd_set_sealed(m, 1); assert_se(r >= 0); r = sd_memfd_get_sealed(m); assert_se(r == 1); fd = sd_memfd_dup_fd(m); assert_se(fd >= 0); sd_memfd_free(m); /* new sd_memfd, same underlying memfd */ r = sd_memfd_make(fd, &m); assert_se(r >= 0); /* we did truncate it to 6 */ r = sd_memfd_get_size(m, &sz); assert_se(r >= 0 && sz == 6); /* map it, check content */ r = sd_memfd_map(m, 0, 12, (void **)&s); assert_se(r >= 0); /* we only see the truncated size */ assert_se(streq(s, "hello ")); /* it was already sealed */ r = sd_memfd_set_sealed(m, 1); assert_se(r == -EALREADY); /* we cannot break the seal, it is mapped */ r = sd_memfd_set_sealed(m, 0); assert_se(r == -ETXTBSY); /* unmap it; become the single owner */ assert_se(munmap(s, 12) == 0); /* now we can do flip the sealing */ r = sd_memfd_set_sealed(m, 0); assert_se(r == 0); r = sd_memfd_get_sealed(m); assert_se(r == 0); r = sd_memfd_set_sealed(m, 1); assert_se(r == 0); r = sd_memfd_get_sealed(m); assert_se(r == 1); r = sd_memfd_set_sealed(m, 0); assert_se(r == 0); r = sd_memfd_get_sealed(m); assert_se(r == 0); /* seek at 2, read() 2 bytes */ assert_se(lseek(fd, 2, SEEK_SET) == 2); assert_se(read(fd, buf, 2) == 2); /* check content */ assert_se(memcmp(buf, "ll", 2) == 0); /* writev it out*/ iov[0].iov_base = (char *)"ABC"; iov[0].iov_len = 3; iov[1].iov_base = (char *)"DEF"; iov[1].iov_len = 3; iov[2].iov_base = (char *)"GHI"; iov[2].iov_len = 3; assert_se(pwritev(fd, iov, 3, 0) == 9); /* readv it back */ iov[0].iov_base = bufv[0]; iov[0].iov_len = 3; iov[1].iov_base = bufv[1]; iov[1].iov_len = 3; iov[2].iov_base = bufv[2]; iov[2].iov_len = 3; assert_se(preadv(fd, iov, 3, 0) == 9); /* check content */ assert_se(memcmp(bufv[0], "ABC", 3) == 0); assert_se(memcmp(bufv[1], "DEF", 3) == 0); assert_se(memcmp(bufv[2], "GHI", 3) == 0); sd_memfd_free(m); return 0; }