From: Jeff Hostetler <jeffhost@xxxxxxxxxxxxx>
Convert test helper to use `start_bg_command()` when spawning a server
daemon in the background rather than blocks of platform-specific code.
Signed-off-by: Jeff Hostetler <jeffhost@xxxxxxxxxxxxx>
---
t/helper/test-simple-ipc.c | 193 ++++++++-----------------------------
1 file changed, 40 insertions(+), 153 deletions(-)
diff --git a/t/helper/test-simple-ipc.c b/t/helper/test-simple-ipc.c
index 91345180750..59a950f3b00 100644
--- a/t/helper/test-simple-ipc.c
+++ b/t/helper/test-simple-ipc.c
@@ -9,6 +9,7 @@
#include "parse-options.h"
#include "thread-utils.h"
#include "strvec.h"
+#include "run-command.h"
#ifndef SUPPORTS_SIMPLE_IPC
int cmd__simple_ipc(int argc, const char **argv)
@@ -274,178 +275,64 @@ static int daemon__run_server(void)
return ret;
}
-#ifndef GIT_WINDOWS_NATIVE
-/*
- * This is adapted from `daemonize()`. Use `fork()` to directly create and
- * run the daemon in a child process.
- */
-static int spawn_server(pid_t *pid)
-{
- struct ipc_server_opts opts = {
- .nr_threads = cl_args.nr_threads,
- };
+static start_bg_wait_cb bg_wait_cb;
- *pid = fork();
-
- switch (*pid) {
- case 0:
- if (setsid() == -1)
- error_errno(_("setsid failed"));
- close(0);
- close(1);
- close(2);
- sanitize_stdfds();
+static int bg_wait_cb(void *cb_data, const struct child_process *cp)
+{
+ int s = ipc_get_active_state(cl_args.path);
- return ipc_server_run(cl_args.path, &opts, test_app_cb,
- (void*)&my_app_data);
+ switch (s) {
+ case IPC_STATE__LISTENING:
+ /* child is "ready" */
+ return 0;
- case -1:
- return error_errno(_("could not spawn daemon in the background"));
+ case IPC_STATE__NOT_LISTENING:
+ case IPC_STATE__PATH_NOT_FOUND:
+ /* give child more time */
+ return 1;
default:
- return 0;
+ case IPC_STATE__INVALID_PATH:
+ case IPC_STATE__OTHER_ERROR:
+ /* all the time in world won't help */
+ return -1;
}
}
-#else
-/*
- * Conceptually like `daemonize()` but different because Windows does not
- * have `fork(2)`. Spawn a normal Windows child process but without the
- * limitations of `start_command()` and `finish_command()`.
- */
-static int spawn_server(pid_t *pid)
-{
- char test_tool_exe[MAX_PATH];
- struct strvec args = STRVEC_INIT;
- int in, out;
-
- GetModuleFileNameA(NULL, test_tool_exe, MAX_PATH);
-
- in = open("/dev/null", O_RDONLY);
- out = open("/dev/null", O_WRONLY);
-
- strvec_push(&args, test_tool_exe);
- strvec_push(&args, "simple-ipc");
- strvec_push(&args, "run-daemon");
- strvec_pushf(&args, "--name=%s", cl_args.path);
- strvec_pushf(&args, "--threads=%d", cl_args.nr_threads);
-
- *pid = mingw_spawnvpe(args.v[0], args.v, NULL, NULL, in, out, out);
- close(in);
- close(out);
-
- strvec_clear(&args);
- if (*pid < 0)
- return error(_("could not spawn daemon in the background"));
-
- return 0;
-}
-#endif
-
-/*
- * This is adapted from `wait_or_whine()`. Watch the child process and
- * let it get started and begin listening for requests on the socket
- * before reporting our success.
- */
-static int wait_for_server_startup(pid_t pid_child)
+static int daemon__start_server(void)
{
- int status;
- pid_t pid_seen;
- enum ipc_active_state s;
- time_t time_limit, now;
+ struct child_process cp = CHILD_PROCESS_INIT;
+ enum start_bg_result sbgr;
- time(&time_limit);
- time_limit += cl_args.max_wait_sec;
+ strvec_push(&cp.args, "test-tool");
+ strvec_push(&cp.args, "simple-ipc");
+ strvec_push(&cp.args, "run-daemon");
+ strvec_pushf(&cp.args, "--name=%s", cl_args.path);
+ strvec_pushf(&cp.args, "--threads=%d", cl_args.nr_threads);
- for (;;) {
- pid_seen = waitpid(pid_child, &status, WNOHANG);
+ cp.no_stdin = 1;
+ cp.no_stdout = 1;
+ cp.no_stderr = 1;
- if (pid_seen == -1)
- return error_errno(_("waitpid failed"));
+ sbgr = start_bg_command(&cp, bg_wait_cb, NULL, cl_args.max_wait_sec);
- else if (pid_seen == 0) {
- /*
- * The child is still running (this should be
- * the normal case). Try to connect to it on
- * the socket and see if it is ready for
- * business.
- *
- * If there is another daemon already running,
- * our child will fail to start (possibly
- * after a timeout on the lock), but we don't
- * care (who responds) if the socket is live.
- */
- s = ipc_get_active_state(cl_args.path);
- if (s == IPC_STATE__LISTENING)
- return 0;
-
- time(&now);
- if (now > time_limit)
- return error(_("daemon not online yet"));
-
- continue;
- }
+ switch (sbgr) {
+ case SBGR_READY:
+ return 0;
- else if (pid_seen == pid_child) {
- /*
- * The new child daemon process shutdown while
- * it was starting up, so it is not listening
- * on the socket.
- *
- * Try to ping the socket in the odd chance
- * that another daemon started (or was already
- * running) while our child was starting.
- *
- * Again, we don't care who services the socket.
- */
- s = ipc_get_active_state(cl_args.path);
- if (s == IPC_STATE__LISTENING)
- return 0;
+ default:
+ case SBGR_ERROR:
+ case SBGR_CB_ERROR:
+ return error("daemon failed to start");
- /*
- * We don't care about the WEXITSTATUS() nor
- * any of the WIF*(status) values because
- * `cmd__simple_ipc()` does the `!!result`
- * trick on all function return values.
- *
- * So it is sufficient to just report the
- * early shutdown as an error.
- */
- return error(_("daemon failed to start"));
- }
+ case SBGR_TIMEOUT:
+ return error("daemon not online yet");
- else
- return error(_("waitpid is confused"));
+ case SBGR_DIED:
+ return error("daemon terminated");
}
}
-/*
- * This process will start a simple-ipc server in a background process and
- * wait for it to become ready. This is like `daemonize()` but gives us
- * more control and better error reporting (and makes it easier to write
- * unit tests).
- */
-static int daemon__start_server(void)
-{
- pid_t pid_child;
- int ret;
-
- /*
- * Run the actual daemon in a background process.
- */
- ret = spawn_server(&pid_child);
- if (pid_child <= 0)
- return ret;
-
- /*
- * Let the parent wait for the child process to get started
- * and begin listening for requests on the socket.
- */
- ret = wait_for_server_startup(pid_child);
-
- return ret;
-}
-
/*
* This process will run a quick probe to see if a simple-ipc server
* is active on this path.
--
gitgitgadget
