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-rw-r--r--src/test/test-exec-util.c473
1 files changed, 473 insertions, 0 deletions
diff --git a/src/test/test-exec-util.c b/src/test/test-exec-util.c
new file mode 100644
index 0000000..e9e8e21
--- /dev/null
+++ b/src/test/test-exec-util.c
@@ -0,0 +1,473 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "copy.h"
+#include "def.h"
+#include "env-util.h"
+#include "exec-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "log.h"
+#include "macro.h"
+#include "path-util.h"
+#include "rm-rf.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tests.h"
+
+static int here = 0, here2 = 0, here3 = 0;
+void *ignore_stdout_args[] = {&here, &here2, &here3};
+
+/* noop handlers, just check that arguments are passed correctly */
+static int ignore_stdout_func(int fd, void *arg) {
+ assert(fd >= 0);
+ assert(arg == &here);
+ safe_close(fd);
+
+ return 0;
+}
+static int ignore_stdout_func2(int fd, void *arg) {
+ assert(fd >= 0);
+ assert(arg == &here2);
+ safe_close(fd);
+
+ return 0;
+}
+static int ignore_stdout_func3(int fd, void *arg) {
+ assert(fd >= 0);
+ assert(arg == &here3);
+ safe_close(fd);
+
+ return 0;
+}
+
+static const gather_stdout_callback_t ignore_stdout[] = {
+ ignore_stdout_func,
+ ignore_stdout_func2,
+ ignore_stdout_func3,
+};
+
+static void test_execute_directory(bool gather_stdout) {
+ char template_lo[] = "/tmp/test-exec-util.lo.XXXXXXX";
+ char template_hi[] = "/tmp/test-exec-util.hi.XXXXXXX";
+ const char * dirs[] = {template_hi, template_lo, NULL};
+ const char *name, *name2, *name3,
+ *overridden, *override,
+ *masked, *mask,
+ *masked2, *mask2, /* the mask is non-executable */
+ *masked2e, *mask2e; /* the mask is executable */
+
+ log_info("/* %s (%s) */", __func__, gather_stdout ? "gathering stdout" : "asynchronous");
+
+ assert_se(mkdtemp(template_lo));
+ assert_se(mkdtemp(template_hi));
+
+ name = strjoina(template_lo, "/script");
+ name2 = strjoina(template_hi, "/script2");
+ name3 = strjoina(template_lo, "/useless");
+ overridden = strjoina(template_lo, "/overridden");
+ override = strjoina(template_hi, "/overridden");
+ masked = strjoina(template_lo, "/masked");
+ mask = strjoina(template_hi, "/masked");
+ masked2 = strjoina(template_lo, "/masked2");
+ mask2 = strjoina(template_hi, "/masked2");
+ masked2e = strjoina(template_lo, "/masked2e");
+ mask2e = strjoina(template_hi, "/masked2e");
+
+ assert_se(write_string_file(name,
+ "#!/bin/sh\necho 'Executing '$0\ntouch $(dirname $0)/it_works",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(name2,
+ "#!/bin/sh\necho 'Executing '$0\ntouch $(dirname $0)/it_works2",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(overridden,
+ "#!/bin/sh\necho 'Executing '$0\ntouch $(dirname $0)/failed",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(override,
+ "#!/bin/sh\necho 'Executing '$0",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(masked,
+ "#!/bin/sh\necho 'Executing '$0\ntouch $(dirname $0)/failed",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(masked2,
+ "#!/bin/sh\necho 'Executing '$0\ntouch $(dirname $0)/failed",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(masked2e,
+ "#!/bin/sh\necho 'Executing '$0\ntouch $(dirname $0)/failed",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(symlink("/dev/null", mask) == 0);
+ assert_se(touch(mask2) == 0);
+ assert_se(touch(mask2e) == 0);
+ assert_se(touch(name3) >= 0);
+
+ assert_se(chmod(name, 0755) == 0);
+ assert_se(chmod(name2, 0755) == 0);
+ assert_se(chmod(overridden, 0755) == 0);
+ assert_se(chmod(override, 0755) == 0);
+ assert_se(chmod(masked, 0755) == 0);
+ assert_se(chmod(masked2, 0755) == 0);
+ assert_se(chmod(masked2e, 0755) == 0);
+ assert_se(chmod(mask2e, 0755) == 0);
+
+ if (access(name, X_OK) < 0 && ERRNO_IS_PRIVILEGE(errno))
+ return;
+
+ if (gather_stdout)
+ execute_directories(dirs, DEFAULT_TIMEOUT_USEC, ignore_stdout, ignore_stdout_args, NULL, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
+ else
+ execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, NULL, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
+
+ assert_se(chdir(template_lo) == 0);
+ assert_se(access("it_works", F_OK) >= 0);
+ assert_se(access("failed", F_OK) < 0);
+
+ assert_se(chdir(template_hi) == 0);
+ assert_se(access("it_works2", F_OK) >= 0);
+ assert_se(access("failed", F_OK) < 0);
+
+ (void) rm_rf(template_lo, REMOVE_ROOT|REMOVE_PHYSICAL);
+ (void) rm_rf(template_hi, REMOVE_ROOT|REMOVE_PHYSICAL);
+}
+
+static void test_execution_order(void) {
+ char template_lo[] = "/tmp/test-exec-util-lo.XXXXXXX";
+ char template_hi[] = "/tmp/test-exec-util-hi.XXXXXXX";
+ const char *dirs[] = {template_hi, template_lo, NULL};
+ const char *name, *name2, *name3, *overridden, *override, *masked, *mask;
+ const char *output, *t;
+ _cleanup_free_ char *contents = NULL;
+
+ assert_se(mkdtemp(template_lo));
+ assert_se(mkdtemp(template_hi));
+
+ output = strjoina(template_hi, "/output");
+
+ log_info("/* %s >>%s */", __func__, output);
+
+ /* write files in "random" order */
+ name2 = strjoina(template_lo, "/90-bar");
+ name = strjoina(template_hi, "/80-foo");
+ name3 = strjoina(template_lo, "/last");
+ overridden = strjoina(template_lo, "/30-override");
+ override = strjoina(template_hi, "/30-override");
+ masked = strjoina(template_lo, "/10-masked");
+ mask = strjoina(template_hi, "/10-masked");
+
+ t = strjoina("#!/bin/sh\necho $(basename $0) >>", output);
+ assert_se(write_string_file(name, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho $(basename $0) >>", output);
+ assert_se(write_string_file(name2, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho $(basename $0) >>", output);
+ assert_se(write_string_file(name3, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho OVERRIDDEN >>", output);
+ assert_se(write_string_file(overridden, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho $(basename $0) >>", output);
+ assert_se(write_string_file(override, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho MASKED >>", output);
+ assert_se(write_string_file(masked, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ assert_se(symlink("/dev/null", mask) == 0);
+
+ assert_se(chmod(name, 0755) == 0);
+ assert_se(chmod(name2, 0755) == 0);
+ assert_se(chmod(name3, 0755) == 0);
+ assert_se(chmod(overridden, 0755) == 0);
+ assert_se(chmod(override, 0755) == 0);
+ assert_se(chmod(masked, 0755) == 0);
+
+ if (access(name, X_OK) < 0 && ERRNO_IS_PRIVILEGE(errno))
+ return;
+
+ execute_directories(dirs, DEFAULT_TIMEOUT_USEC, ignore_stdout, ignore_stdout_args, NULL, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
+
+ assert_se(read_full_file(output, &contents, NULL) >= 0);
+ assert_se(streq(contents, "30-override\n80-foo\n90-bar\nlast\n"));
+
+ (void) rm_rf(template_lo, REMOVE_ROOT|REMOVE_PHYSICAL);
+ (void) rm_rf(template_hi, REMOVE_ROOT|REMOVE_PHYSICAL);
+}
+
+static int gather_stdout_one(int fd, void *arg) {
+ char ***s = arg, *t;
+ char buf[128] = {};
+
+ assert_se(s);
+ assert_se(read(fd, buf, sizeof buf) >= 0);
+ safe_close(fd);
+
+ assert_se(t = strndup(buf, sizeof buf));
+ assert_se(strv_push(s, t) >= 0);
+
+ return 0;
+}
+static int gather_stdout_two(int fd, void *arg) {
+ char ***s = arg, **t;
+
+ STRV_FOREACH(t, *s)
+ assert_se(write(fd, *t, strlen(*t)) == (ssize_t) strlen(*t));
+ safe_close(fd);
+
+ return 0;
+}
+static int gather_stdout_three(int fd, void *arg) {
+ char **s = arg;
+ char buf[128] = {};
+
+ assert_se(read(fd, buf, sizeof buf - 1) > 0);
+ safe_close(fd);
+ assert_se(*s = strndup(buf, sizeof buf));
+
+ return 0;
+}
+
+const gather_stdout_callback_t gather_stdout[] = {
+ gather_stdout_one,
+ gather_stdout_two,
+ gather_stdout_three,
+};
+
+static void test_stdout_gathering(void) {
+ char template[] = "/tmp/test-exec-util.XXXXXXX";
+ const char *dirs[] = {template, NULL};
+ const char *name, *name2, *name3;
+ int r;
+
+ char **tmp = NULL; /* this is only used in the forked process, no cleanup here */
+ _cleanup_free_ char *output = NULL;
+
+ void* args[] = {&tmp, &tmp, &output};
+
+ assert_se(mkdtemp(template));
+
+ log_info("/* %s */", __func__);
+
+ /* write files */
+ name = strjoina(template, "/10-foo");
+ name2 = strjoina(template, "/20-bar");
+ name3 = strjoina(template, "/30-last");
+
+ assert_se(write_string_file(name,
+ "#!/bin/sh\necho a\necho b\necho c\n",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(name2,
+ "#!/bin/sh\necho d\n",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(name3,
+ "#!/bin/sh\nsleep 1",
+ WRITE_STRING_FILE_CREATE) == 0);
+
+ assert_se(chmod(name, 0755) == 0);
+ assert_se(chmod(name2, 0755) == 0);
+ assert_se(chmod(name3, 0755) == 0);
+
+ if (access(name, X_OK) < 0 && ERRNO_IS_PRIVILEGE(errno))
+ return;
+
+ r = execute_directories(dirs, DEFAULT_TIMEOUT_USEC, gather_stdout, args, NULL, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
+ assert_se(r >= 0);
+
+ log_info("got: %s", output);
+
+ assert_se(streq(output, "a\nb\nc\nd\n"));
+}
+
+static void test_environment_gathering(void) {
+ char template[] = "/tmp/test-exec-util.XXXXXXX", **p;
+ const char *dirs[] = {template, NULL};
+ const char *name, *name2, *name3, *old;
+ int r;
+
+ char **tmp = NULL; /* this is only used in the forked process, no cleanup here */
+ _cleanup_strv_free_ char **env = NULL;
+
+ void* const args[] = { &tmp, &tmp, &env };
+
+ assert_se(mkdtemp(template));
+
+ log_info("/* %s */", __func__);
+
+ /* write files */
+ name = strjoina(template, "/10-foo");
+ name2 = strjoina(template, "/20-bar");
+ name3 = strjoina(template, "/30-last");
+
+ assert_se(write_string_file(name,
+ "#!/bin/sh\n"
+ "echo A=23\n",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(name2,
+ "#!/bin/sh\n"
+ "echo A=22:$A\n\n\n", /* substitution from previous generator */
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(name3,
+ "#!/bin/sh\n"
+ "echo A=$A:24\n"
+ "echo B=12\n"
+ "echo C=000\n"
+ "echo C=001\n" /* variable overwriting */
+ /* various invalid entries */
+ "echo unset A\n"
+ "echo unset A=\n"
+ "echo unset A=B\n"
+ "echo unset \n"
+ "echo A B=C\n"
+ "echo A\n"
+ /* test variable assignment without newline */
+ "echo PATH=$PATH:/no/such/file", /* no newline */
+ WRITE_STRING_FILE_CREATE) == 0);
+
+ assert_se(chmod(name, 0755) == 0);
+ assert_se(chmod(name2, 0755) == 0);
+ assert_se(chmod(name3, 0755) == 0);
+
+ /* When booting in containers or without initramfs there might not be
+ * any PATH in the environment and if there is no PATH /bin/sh built-in
+ * PATH may leak and override systemd's DEFAULT_PATH which is not
+ * good. Force our own PATH in environment, to prevent expansion of sh
+ * built-in $PATH */
+ old = getenv("PATH");
+ r = setenv("PATH", "no-sh-built-in-path", 1);
+ assert_se(r >= 0);
+
+ if (access(name, X_OK) < 0 && ERRNO_IS_PRIVILEGE(errno))
+ return;
+
+ r = execute_directories(dirs, DEFAULT_TIMEOUT_USEC, gather_environment, args, NULL, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
+ assert_se(r >= 0);
+
+ STRV_FOREACH(p, env)
+ log_info("got env: \"%s\"", *p);
+
+ assert_se(streq(strv_env_get(env, "A"), "22:23:24"));
+ assert_se(streq(strv_env_get(env, "B"), "12"));
+ assert_se(streq(strv_env_get(env, "C"), "001"));
+ assert_se(streq(strv_env_get(env, "PATH"), "no-sh-built-in-path:/no/such/file"));
+
+ /* now retest with "default" path passed in, as created by
+ * manager_default_environment */
+ env = strv_free(env);
+ env = strv_new("PATH=" DEFAULT_PATH);
+ assert_se(env);
+
+ r = execute_directories(dirs, DEFAULT_TIMEOUT_USEC, gather_environment, args, NULL, env, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
+ assert_se(r >= 0);
+
+ STRV_FOREACH(p, env)
+ log_info("got env: \"%s\"", *p);
+
+ assert_se(streq(strv_env_get(env, "A"), "22:23:24"));
+ assert_se(streq(strv_env_get(env, "B"), "12"));
+ assert_se(streq(strv_env_get(env, "C"), "001"));
+ assert_se(streq(strv_env_get(env, "PATH"), DEFAULT_PATH ":/no/such/file"));
+
+ /* reset environ PATH */
+ assert_se(set_unset_env("PATH", old, true) == 0);
+}
+
+static void test_error_catching(void) {
+ char template[] = "/tmp/test-exec-util.XXXXXXX";
+ const char *dirs[] = {template, NULL};
+ const char *name, *name2, *name3;
+ int r;
+
+ assert_se(mkdtemp(template));
+
+ log_info("/* %s */", __func__);
+
+ /* write files */
+ name = strjoina(template, "/10-foo");
+ name2 = strjoina(template, "/20-bar");
+ name3 = strjoina(template, "/30-last");
+
+ assert_se(write_string_file(name,
+ "#!/bin/sh\necho a\necho b\necho c\n",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(name2,
+ "#!/bin/sh\nexit 42\n",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(name3,
+ "#!/bin/sh\nexit 12",
+ WRITE_STRING_FILE_CREATE) == 0);
+
+ assert_se(chmod(name, 0755) == 0);
+ assert_se(chmod(name2, 0755) == 0);
+ assert_se(chmod(name3, 0755) == 0);
+
+ if (access(name, X_OK) < 0 && ERRNO_IS_PRIVILEGE(errno))
+ return;
+
+ r = execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, NULL, NULL, EXEC_DIR_NONE);
+
+ /* we should exit with the error code of the first script that failed */
+ assert_se(r == 42);
+}
+
+static void test_exec_command_flags_from_strv(void) {
+ ExecCommandFlags flags = 0;
+ char **valid_strv = STRV_MAKE("no-env-expand", "no-setuid", "ignore-failure");
+ char **invalid_strv = STRV_MAKE("no-env-expand", "no-setuid", "nonexistent-option", "ignore-failure");
+ int r;
+
+ r = exec_command_flags_from_strv(valid_strv, &flags);
+
+ assert_se(r == 0);
+ assert_se(FLAGS_SET(flags, EXEC_COMMAND_NO_ENV_EXPAND));
+ assert_se(FLAGS_SET(flags, EXEC_COMMAND_NO_SETUID));
+ assert_se(FLAGS_SET(flags, EXEC_COMMAND_IGNORE_FAILURE));
+ assert_se(!FLAGS_SET(flags, EXEC_COMMAND_AMBIENT_MAGIC));
+ assert_se(!FLAGS_SET(flags, EXEC_COMMAND_FULLY_PRIVILEGED));
+
+ r = exec_command_flags_from_strv(invalid_strv, &flags);
+
+ assert_se(r == -EINVAL);
+}
+
+static void test_exec_command_flags_to_strv(void) {
+ _cleanup_strv_free_ char **opts = NULL, **empty_opts = NULL, **invalid_opts = NULL;
+ ExecCommandFlags flags = 0;
+ int r;
+
+ flags |= (EXEC_COMMAND_AMBIENT_MAGIC|EXEC_COMMAND_NO_ENV_EXPAND|EXEC_COMMAND_IGNORE_FAILURE);
+
+ r = exec_command_flags_to_strv(flags, &opts);
+
+ assert_se(r == 0);
+ assert_se(strv_equal(opts, STRV_MAKE("ignore-failure", "ambient", "no-env-expand")));
+
+ r = exec_command_flags_to_strv(0, &empty_opts);
+
+ assert_se(r == 0);
+ assert_se(strv_equal(empty_opts, STRV_MAKE_EMPTY));
+
+ flags = _EXEC_COMMAND_FLAGS_INVALID;
+
+ r = exec_command_flags_to_strv(flags, &invalid_opts);
+
+ assert_se(r == -EINVAL);
+}
+
+int main(int argc, char *argv[]) {
+ test_setup_logging(LOG_DEBUG);
+
+ test_execute_directory(true);
+ test_execute_directory(false);
+ test_execution_order();
+ test_stdout_gathering();
+ test_environment_gathering();
+ test_error_catching();
+ test_exec_command_flags_from_strv();
+ test_exec_command_flags_to_strv();
+
+ return 0;
+}
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