startup_checks: Use Windows flow for *nix

Spawns a child using fork and exec as opposed to fork alone. Workaround
for the macos file manager complaining about not supporting fork without
exec.

Control flow for *nix is now roughly the same as for Windows.
This commit is contained in:
lat9nq 2022-11-23 21:35:47 -05:00
parent 168c9ee341
commit 3e6c835a64
2 changed files with 51 additions and 9 deletions

View file

@ -4,11 +4,14 @@
#include "video_core/vulkan_common/vulkan_wrapper.h"
#ifdef _WIN32
#include <cstring> // for memset, strncpy
#include <cstring> // for memset, strncpy, strncmp
#include <processthreadsapi.h>
#include <windows.h>
#elif defined(YUZU_UNIX)
#include <cstring> // for strncmp
#include <errno.h>
#include <spawn.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#endif
@ -53,6 +56,13 @@ bool CheckEnvVars(bool* is_child) {
IS_CHILD_ENV_VAR, GetLastError());
return true;
}
#elif defined(YUZU_UNIX)
const char* startup_check_var = getenv(STARTUP_CHECK_ENV_VAR);
if (startup_check_var != nullptr &&
std::strncmp(startup_check_var, ENV_VAR_ENABLED_TEXT, 8) == 0) {
CheckVulkan();
return true;
}
#endif
return false;
}
@ -101,20 +111,22 @@ bool StartupChecks(const char* arg0, bool* has_broken_vulkan, bool perform_vulka
}
#elif defined(YUZU_UNIX)
if (perform_vulkan_check) {
const pid_t pid = fork();
if (pid == 0) {
CheckVulkan();
return true;
} else if (pid == -1) {
const int env_var_set = setenv(STARTUP_CHECK_ENV_VAR, ENV_VAR_ENABLED_TEXT, 1);
if (env_var_set == -1) {
const int err = errno;
std::fprintf(stderr, "fork failed with error %d\n", err);
std::fprintf(stderr, "setenv failed to set %s with error %d\n", STARTUP_CHECK_ENV_VAR, err);
return false;
}
if (perform_vulkan_check) {
const pid_t pid = SpawnChild(arg0);
if (pid == -1) {
return false;
}
// Get exit code from child process
int status;
const int r_val = wait(&status);
const int r_val = waitpid(pid, &status, 0);
if (r_val == -1) {
const int err = errno;
std::fprintf(stderr, "wait failed with error %d\n", err);
@ -123,6 +135,13 @@ bool StartupChecks(const char* arg0, bool* has_broken_vulkan, bool perform_vulka
// Vulkan is broken if the child crashed (return value is not zero)
*has_broken_vulkan = (status != 0);
}
const int env_var_cleared = unsetenv(STARTUP_CHECK_ENV_VAR);
if (env_var_cleared == -1) {
const int err = errno;
std::fprintf(stderr, "unsetenv failed to clear %s with error %d\n", STARTUP_CHECK_ENV_VAR,
err);
}
#endif
return false;
}
@ -156,4 +175,23 @@ bool SpawnChild(const char* arg0, PROCESS_INFORMATION* pi, int flags) {
return true;
}
#elif defined(YUZU_UNIX)
pid_t SpawnChild(const char* arg0) {
const pid_t pid = fork();
if (pid == -1) {
// error
const int err = errno;
std::fprintf(stderr, "fork failed with error %d\n", err);
return pid;
} else if (pid == 0) {
// child
execl(arg0, arg0, nullptr);
const int err = errno;
std::fprintf(stderr, "execl failed with error %d\n", err);
return -1;
}
return pid;
}
#endif

View file

@ -5,6 +5,8 @@
#ifdef _WIN32
#include <windows.h>
#elif defined(YUZU_UNIX)
#include <sys/types.h>
#endif
constexpr char IS_CHILD_ENV_VAR[] = "YUZU_IS_CHILD";
@ -17,4 +19,6 @@ bool StartupChecks(const char* arg0, bool* has_broken_vulkan, bool perform_vulka
#ifdef _WIN32
bool SpawnChild(const char* arg0, PROCESS_INFORMATION* pi, int flags);
#elif defined(YUZU_UNIX)
pid_t SpawnChild(const char* arg0);
#endif