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|
#include "libnetdata/libnetdata.h"
#include "libnetdata/required_dummies.h"
#define ENV_VAR_KEY "SPAWN_TESTER"
#define ENV_VAR_VALUE "1234567890"
size_t warnings = 0;
void child_check_environment(void) {
const char *s = getenv(ENV_VAR_KEY);
if(!s || !*s || strcmp(s, ENV_VAR_VALUE) != 0) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Wrong environment. Variable '%s' should have value '%s' but it has '%s'",
ENV_VAR_KEY, ENV_VAR_VALUE, s ? s : "(unset)");
exit(1);
}
}
static bool is_valid_fd(int fd) {
errno_clear();
return fcntl(fd, F_GETFD) != -1 || errno != EBADF;
}
void child_check_fds(void) {
for(int fd = 0; fd < 3; fd++) {
if(!is_valid_fd(fd)) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"fd No %d should be a valid file descriptor - but it isn't.", fd);
exit(1);
}
}
for(int fd = 3; fd < /* os_get_fd_open_max() */ 1024; fd++) {
if(is_valid_fd(fd)) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"fd No %d is a valid file descriptor - it shouldn't.", fd);
exit(1);
}
}
errno_clear();
}
// --------------------------------------------------------------------------------------------------------------------
// kill to stop
int plugin_kill_to_stop() {
child_check_fds();
child_check_environment();
char buffer[1024];
while (fgets(buffer, sizeof(buffer), stdin) != NULL) {
fprintf(stderr, "+");
printf("%s", buffer);
fflush(stdout);
}
return 0;
}
void test_int_fds_plugin_kill_to_stop(SPAWN_SERVER *server, const char *argv0) {
const char *params[] = {
argv0,
"plugin-kill-to-stop",
NULL,
};
SPAWN_INSTANCE *si = spawn_server_exec(server, STDERR_FILENO, 0, params, NULL, 0, SPAWN_INSTANCE_TYPE_EXEC);
if(!si) {
nd_log(NDLS_COLLECTORS, NDLP_ERR, "Cannot run myself as plugin (spawn)");
exit(1);
}
const char *msg = "Hello World!\n";
ssize_t len = strlen(msg);
char buffer[len * 2];
for(size_t j = 0; j < 30 ;j++) {
fprintf(stderr, "-");
memset(buffer, 0, sizeof(buffer));
ssize_t rc = write(spawn_server_instance_write_fd(si), msg, len);
if (rc != len) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot write to plugin. Expected to write %zd bytes, wrote %zd bytes",
len, rc);
exit(1);
}
rc = read(spawn_server_instance_read_fd(si), buffer, sizeof(buffer));
if (rc != len) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot read from plugin. Expected to read %zd bytes, read %zd bytes",
len, rc);
exit(1);
}
if (memcmp(msg, buffer, len) != 0) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Read corrupted data. Expected '%s', Read '%s'",
msg, buffer);
exit(1);
}
}
fprintf(stderr, "\n");
int code = spawn_server_exec_kill(server, si);
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"child exited with code %d",
code);
if(code != 15 && code != 0) {
nd_log(NDLS_COLLECTORS, NDLP_WARNING, "child should exit with code 0 or 15, but exited with code %d", code);
warnings++;
}
}
void test_popen_plugin_kill_to_stop(const char *argv0) {
char cmd[FILENAME_MAX + 100];
snprintfz(cmd, sizeof(cmd), "exec %s plugin-kill-to-stop", argv0);
POPEN_INSTANCE *pi = spawn_popen_run(cmd);
if(!pi) {
nd_log(NDLS_COLLECTORS, NDLP_ERR, "Cannot run myself as plugin (popen)");
exit(1);
}
const char *msg = "Hello World!\n";
size_t len = strlen(msg);
char buffer[len * 2];
for(size_t j = 0; j < 30 ;j++) {
fprintf(stderr, "-");
memset(buffer, 0, sizeof(buffer));
size_t rc = fwrite(msg, 1, len, spawn_popen_stdin(pi));
if (rc != len) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot write to plugin. Expected to write %zu bytes, wrote %zu bytes",
len, rc);
exit(1);
}
fflush(spawn_popen_stdin(pi));
char *s = fgets(buffer, sizeof(buffer), spawn_popen_stdout(pi));
if (!s || strlen(s) != len) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot read from plugin. Expected to read %zu bytes, read %zu bytes",
len, (size_t)(s ? strlen(s) : 0));
exit(1);
}
if (memcmp(msg, buffer, len) != 0) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Read corrupted data. Expected '%s', Read '%s'",
msg, buffer);
exit(1);
}
}
fprintf(stderr, "\n");
int code = spawn_popen_kill(pi);
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"child exited with code %d",
code);
if(code != 0) {
nd_log(NDLS_COLLECTORS, NDLP_WARNING, "child should exit with code 0, but exited with code %d", code);
warnings++;
}
}
// --------------------------------------------------------------------------------------------------------------------
// close to stop
int plugin_close_to_stop() {
child_check_fds();
child_check_environment();
char buffer[1024];
while (fgets(buffer, sizeof(buffer), stdin) != NULL) {
fprintf(stderr, "+");
printf("%s", buffer);
fflush(stdout);
}
nd_log(NDLS_COLLECTORS, NDLP_ERR, "child detected a closed pipe.");
exit(1);
}
void test_int_fds_plugin_close_to_stop(SPAWN_SERVER *server, const char *argv0) {
const char *params[] = {
argv0,
"plugin-close-to-stop",
NULL,
};
SPAWN_INSTANCE *si = spawn_server_exec(server, STDERR_FILENO, 0, params, NULL, 0, SPAWN_INSTANCE_TYPE_EXEC);
if(!si) {
nd_log(NDLS_COLLECTORS, NDLP_ERR, "Cannot run myself as plugin (spawn)");
exit(1);
}
const char *msg = "Hello World!\n";
ssize_t len = strlen(msg);
char buffer[len * 2];
for(size_t j = 0; j < 30 ;j++) {
fprintf(stderr, "-");
memset(buffer, 0, sizeof(buffer));
ssize_t rc = write(spawn_server_instance_write_fd(si), msg, len);
if (rc != len) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot write to plugin. Expected to write %zd bytes, wrote %zd bytes",
len, rc);
exit(1);
}
rc = read(spawn_server_instance_read_fd(si), buffer, sizeof(buffer));
if (rc != len) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot read from plugin. Expected to read %zd bytes, read %zd bytes",
len, rc);
exit(1);
}
if (memcmp(msg, buffer, len) != 0) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Read corrupted data. Expected '%s', Read '%s'",
msg, buffer);
exit(1);
}
break;
}
fprintf(stderr, "\n");
int code = spawn_server_exec_wait(server, si);
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"child exited with code %d",
code);
if(!WIFEXITED(code) || WEXITSTATUS(code) != 1) {
nd_log(NDLS_COLLECTORS, NDLP_WARNING, "child should exit with code 1, but exited with code %d", code);
warnings++;
}
}
void test_popen_plugin_close_to_stop(const char *argv0) {
char cmd[FILENAME_MAX + 100];
snprintfz(cmd, sizeof(cmd), "exec %s plugin-close-to-stop", argv0);
POPEN_INSTANCE *pi = spawn_popen_run(cmd);
if(!pi) {
nd_log(NDLS_COLLECTORS, NDLP_ERR, "Cannot run myself as plugin (popen)");
exit(1);
}
const char *msg = "Hello World!\n";
size_t len = strlen(msg);
char buffer[len * 2];
for(size_t j = 0; j < 30 ;j++) {
fprintf(stderr, "-");
memset(buffer, 0, sizeof(buffer));
size_t rc = fwrite(msg, 1, len, spawn_popen_stdin(pi));
if (rc != len) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot write to plugin. Expected to write %zu bytes, wrote %zu bytes",
len, rc);
exit(1);
}
fflush(spawn_popen_stdin(pi));
char *s = fgets(buffer, sizeof(buffer), spawn_popen_stdout(pi));
if (!s || strlen(s) != len) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot read from plugin. Expected to read %zu bytes, read %zu bytes",
len, (size_t)(s ? strlen(s) : 0));
exit(1);
}
if (memcmp(msg, buffer, len) != 0) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Read corrupted data. Expected '%s', Read '%s'",
msg, buffer);
exit(1);
}
break;
}
fprintf(stderr, "\n");
int code = spawn_popen_wait(pi);
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"child exited with code %d",
code);
if(code != 1) {
nd_log(NDLS_COLLECTORS, NDLP_WARNING, "child should exit with code 1, but exited with code %d", code);
warnings++;
}
}
// --------------------------------------------------------------------------------------------------------------------
// echo and exit
#define ECHO_AND_EXIT_MSG "GOODBYE\n"
int plugin_echo_and_exit() {
child_check_fds();
child_check_environment();
printf(ECHO_AND_EXIT_MSG);
exit(0);
}
void test_int_fds_plugin_echo_and_exit(SPAWN_SERVER *server, const char *argv0) {
const char *params[] = {
argv0,
"plugin-echo-and-exit",
NULL,
};
SPAWN_INSTANCE *si = spawn_server_exec(server, STDERR_FILENO, 0, params, NULL, 0, SPAWN_INSTANCE_TYPE_EXEC);
if(!si) {
nd_log(NDLS_COLLECTORS, NDLP_ERR, "Cannot run myself as plugin (spawn)");
exit(1);
}
char buffer[1024];
size_t reads = 0;
for(size_t j = 0; j < 30 ;j++) {
fprintf(stderr, "-");
memset(buffer, 0, sizeof(buffer));
ssize_t rc = read(spawn_server_instance_read_fd(si), buffer, sizeof(buffer));
if(rc <= 0)
break;
reads++;
if (rc != strlen(ECHO_AND_EXIT_MSG)) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot read from plugin. Expected to read %zu bytes, read %zd bytes",
strlen(ECHO_AND_EXIT_MSG), rc);
exit(1);
}
if (memcmp(ECHO_AND_EXIT_MSG, buffer, strlen(ECHO_AND_EXIT_MSG)) != 0) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Read corrupted data. Expected '%s', Read '%s'",
ECHO_AND_EXIT_MSG, buffer);
exit(1);
}
}
fprintf(stderr, "\n");
if(reads != 1) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot read from plugin. Expected to read %d times, but read %zu",
1, reads);
exit(1);
}
int code = spawn_server_exec_wait(server, si);
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"child exited with code %d",
code);
if(code != 0) {
nd_log(NDLS_COLLECTORS, NDLP_WARNING, "child should exit with code 0, but exited with code %d", code);
warnings++;
}
}
void test_popen_plugin_echo_and_exit(const char *argv0) {
char cmd[FILENAME_MAX + 100];
snprintfz(cmd, sizeof(cmd), "exec %s plugin-echo-and-exit", argv0);
POPEN_INSTANCE *pi = spawn_popen_run(cmd);
if(!pi) {
nd_log(NDLS_COLLECTORS, NDLP_ERR, "Cannot run myself as plugin (popen)");
exit(1);
}
char buffer[1024];
size_t reads = 0;
for(size_t j = 0; j < 30 ;j++) {
fprintf(stderr, "-");
memset(buffer, 0, sizeof(buffer));
char *s = fgets(buffer, sizeof(buffer), spawn_popen_stdout(pi));
if(!s) break;
reads++;
if (strlen(s) != strlen(ECHO_AND_EXIT_MSG)) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot read from plugin. Expected to read %zu bytes, read %zu bytes",
strlen(ECHO_AND_EXIT_MSG), (size_t)(s ? strlen(s) : 0));
exit(1);
}
if (memcmp(ECHO_AND_EXIT_MSG, buffer, strlen(ECHO_AND_EXIT_MSG)) != 0) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Read corrupted data. Expected '%s', Read '%s'",
ECHO_AND_EXIT_MSG, buffer);
exit(1);
}
}
fprintf(stderr, "\n");
if(reads != 1) {
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"Cannot read from plugin. Expected to read %d times, but read %zu",
1, reads);
exit(1);
}
int code = spawn_popen_wait(pi);
nd_log(NDLS_COLLECTORS, NDLP_ERR,
"child exited with code %d",
code);
if(code != 0) {
nd_log(NDLS_COLLECTORS, NDLP_WARNING, "child should exit with code 0, but exited with code %d", code);
warnings++;
}
}
// --------------------------------------------------------------------------------------------------------------------
int main(int argc, const char **argv) {
if(argc > 1 && strcmp(argv[1], "plugin-kill-to-stop") == 0)
return plugin_kill_to_stop();
if(argc > 1 && strcmp(argv[1], "plugin-echo-and-exit") == 0)
return plugin_echo_and_exit();
if(argc > 1 && strcmp(argv[1], "plugin-close-to-stop") == 0)
return plugin_close_to_stop();
if(argc <= 1 || strcmp(argv[1], "test") != 0) {
fprintf(stderr, "Run me with 'test' parameter!\n");
exit(1);
}
nd_setenv(ENV_VAR_KEY, ENV_VAR_VALUE, 1);
fprintf(stderr, "\n\nTESTING fds\n\n");
SPAWN_SERVER *server = spawn_server_create(SPAWN_SERVER_OPTION_EXEC, "test", NULL, argc, argv);
if(!server) {
nd_log(NDLS_COLLECTORS, NDLP_ERR, "Cannot create spawn server");
exit(1);
}
for(size_t i = 0; i < 5; i++) {
fprintf(stderr, "\n\nTESTING fds No %zu (kill to stop)\n\n", i + 1);
test_int_fds_plugin_kill_to_stop(server, argv[0]);
}
for(size_t i = 0; i < 5; i++) {
fprintf(stderr, "\n\nTESTING fds No %zu (echo and exit)\n\n", i + 1);
test_int_fds_plugin_echo_and_exit(server, argv[0]);
}
for(size_t i = 0; i < 5; i++) {
fprintf(stderr, "\n\nTESTING fds No %zu (close to stop)\n\n", i + 1);
test_int_fds_plugin_close_to_stop(server, argv[0]);
}
spawn_server_destroy(server);
fprintf(stderr, "\n\nTESTING popen\n\n");
netdata_main_spawn_server_init("test", argc, argv);
for(size_t i = 0; i < 5; i++) {
fprintf(stderr, "\n\nTESTING popen No %zu (kill to stop)\n\n", i + 1);
test_popen_plugin_kill_to_stop(argv[0]);
}
for(size_t i = 0; i < 5; i++) {
fprintf(stderr, "\n\nTESTING popen No %zu (echo and exit)\n\n", i + 1);
test_popen_plugin_echo_and_exit(argv[0]);
}
for(size_t i = 0; i < 5; i++) {
fprintf(stderr, "\n\nTESTING popen No %zu (close to stop)\n\n", i + 1);
test_popen_plugin_close_to_stop(argv[0]);
}
netdata_main_spawn_server_cleanup();
fprintf(stderr, "\n\nTests passed! (%zu warnings)\n\n", warnings);
exit(0);
}
|
