From 3e6c835a64e99e36f09e39a2a5a34b19f244d3d4 Mon Sep 17 00:00:00 2001 From: lat9nq <22451773+lat9nq@users.noreply.github.com> Date: Wed, 23 Nov 2022 21:35:47 -0500 Subject: [PATCH] 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. --- src/yuzu/startup_checks.cpp | 56 +++++++++++++++++++++++++++++++------ src/yuzu/startup_checks.h | 4 +++ 2 files changed, 51 insertions(+), 9 deletions(-) diff --git a/src/yuzu/startup_checks.cpp b/src/yuzu/startup_checks.cpp index 6a91212e2..95c9fdecb 100644 --- a/src/yuzu/startup_checks.cpp +++ b/src/yuzu/startup_checks.cpp @@ -4,11 +4,14 @@ #include "video_core/vulkan_common/vulkan_wrapper.h" #ifdef _WIN32 -#include // for memset, strncpy +#include // for memset, strncpy, strncmp #include #include #elif defined(YUZU_UNIX) +#include // for strncmp #include +#include +#include #include #include #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) + 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, "setenv failed to set %s with error %d\n", STARTUP_CHECK_ENV_VAR, err); + return false; + } + if (perform_vulkan_check) { - const pid_t pid = fork(); - if (pid == 0) { - CheckVulkan(); - return true; - } else if (pid == -1) { - const int err = errno; - std::fprintf(stderr, "fork failed with error %d\n", err); + 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 diff --git a/src/yuzu/startup_checks.h b/src/yuzu/startup_checks.h index d8e563be6..2f86fb843 100644 --- a/src/yuzu/startup_checks.h +++ b/src/yuzu/startup_checks.h @@ -5,6 +5,8 @@ #ifdef _WIN32 #include +#elif defined(YUZU_UNIX) +#include #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