src/udev/test-udev-spawn.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "path-util.h"
   4 #include "signal-util.h"
   5 #include "strv.h"
   6 #include "tests.h"
   7 #include "udev-event.h"
   8 #include "udev-spawn.h"
   9
  10 #define BUF_SIZE 1024
  11
  12 static void test_event_spawn_core(bool with_pidfd, const char *cmd, char *result_buf, size_t buf_size) {
  13         _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
  14         _cleanup_(udev_event_freep) UdevEvent *event = NULL;
  15
  16         assert_se(setenv("SYSTEMD_PIDFD", yes_no(with_pidfd), 1) >= 0);
  17
  18         assert_se(sd_device_new_from_syspath(&dev, "/sys/class/net/lo") >= 0);
  19         assert_se(event = udev_event_new(dev, 0, NULL, LOG_DEBUG));
  20         assert_se(udev_event_spawn(event, 5 * USEC_PER_SEC, SIGKILL, false, cmd, result_buf, buf_size, NULL) == 0);
  21
  22         assert_se(unsetenv("SYSTEMD_PIDFD") >= 0);
  23 }
  24
  25 static void test_event_spawn_cat(bool with_pidfd, size_t buf_size) {
  26         _cleanup_strv_free_ char **lines = NULL;
  27         _cleanup_free_ char *cmd = NULL;
  28         char result_buf[BUF_SIZE];
  29
  30         log_debug("/* %s(%s) */", __func__, yes_no(with_pidfd));
  31
  32         assert_se(find_executable("cat", &cmd) >= 0);
  33         assert_se(strextend_with_separator(&cmd, " ", "/sys/class/net/lo/uevent"));
  34
  35         test_event_spawn_core(with_pidfd, cmd, result_buf,
  36                               buf_size >= BUF_SIZE ? BUF_SIZE : buf_size);
  37
  38         assert_se(lines = strv_split_newlines(result_buf));
  39         strv_print(lines);
  40
  41         if (buf_size >= BUF_SIZE) {
  42                 assert_se(strv_contains(lines, "INTERFACE=lo"));
  43                 assert_se(strv_contains(lines, "IFINDEX=1"));
  44         }
  45 }
  46
  47 static void test_event_spawn_self(const char *self, const char *arg, bool with_pidfd) {
  48         _cleanup_strv_free_ char **lines = NULL;
  49         _cleanup_free_ char *cmd = NULL;
  50         char result_buf[BUF_SIZE];
  51
  52         log_debug("/* %s(%s, %s) */", __func__, arg, yes_no(with_pidfd));
  53
  54         assert_se(cmd = strjoin(self, " ", arg));
  55
  56         test_event_spawn_core(with_pidfd, cmd, result_buf, BUF_SIZE);
  57
  58         assert_se(lines = strv_split_newlines(result_buf));
  59         strv_print(lines);
  60
  61         assert_se(strv_contains(lines, "aaa"));
  62         assert_se(strv_contains(lines, "bbb"));
  63 }
  64
  65 static void test1(void) {
  66         fprintf(stdout, "aaa\nbbb");
  67         fprintf(stderr, "ccc\nddd");
  68 }
  69
  70 static void test2(void) {
  71         char buf[16384];
  72
  73         fprintf(stdout, "aaa\nbbb");
  74
  75         memset(buf, 'a', sizeof(buf) - 1);
  76         char_array_0(buf);
  77         fputs(buf, stderr);
  78 }
  79
  80 int main(int argc, char *argv[]) {
  81         _cleanup_free_ char *self = NULL;
  82
  83         if (argc > 1) {
  84                 if (streq(argv[1], "test1"))
  85                         test1();
  86                 else if (streq(argv[1], "test2"))
  87                         test2();
  88                 else
  89                         assert_not_reached();
  90
  91                 return 0;
  92         }
  93
  94         test_setup_logging(LOG_DEBUG);
  95
  96         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
  97
  98         test_event_spawn_cat(true, SIZE_MAX);
  99         test_event_spawn_cat(false, SIZE_MAX);
 100         test_event_spawn_cat(true, 5);
 101         test_event_spawn_cat(false, 5);
 102
 103         assert_se(path_make_absolute_cwd(argv[0], &self) >= 0);
 104         path_simplify(self);
 105
 106         test_event_spawn_self(self, "test1", true);
 107         test_event_spawn_self(self, "test1", false);
 108
 109         test_event_spawn_self(self, "test2", true);
 110         test_event_spawn_self(self, "test2", false);
 111
 112         return 0;
 113 }