[PATCH v2 1/4] kernel32: Return BIOS info from GetSystemFirmwareTable on Linux

[Alex Henrie]

Signed-off-by: Alex Henrie <alexhenrie24 at gmail.com>
---
 dlls/kernel32/process.c | 130 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 129 insertions(+), 1 deletion(-)

diff --git a/dlls/kernel32/process.c b/dlls/kernel32/process.c
index ff56e9a692..6797475438 100644
--- a/dlls/kernel32/process.c
+++ b/dlls/kernel32/process.c
@@ -81,6 +81,30 @@ typedef struct
     DWORD dwReserved;
 } LOADPARMS32;
 
+#include "pshpack1.h"
+
+struct smbios_prologue {
+    BYTE calling_method;
+    BYTE major_version;
+    BYTE minor_version;
+    BYTE revision;
+    DWORD length;
+};
+
+struct smbios_bios {
+    BYTE type;
+    BYTE length;
+    WORD handle;
+    BYTE manufacturer;
+    BYTE version;
+    WORD start;
+    BYTE date;
+    BYTE size;
+    UINT64 characteristics;
+};
+
+#include "poppack.h"
+
 static DWORD shutdown_flags = 0;
 static DWORD shutdown_priority = 0x280;
 static BOOL is_wow64;
@@ -102,6 +126,11 @@ const WCHAR *DIR_SysWow64 = NULL;
 #define PDB32_FILE_APIS_OEM 0x0040  /* File APIs are OEM */
 #define PDB32_WIN32S_PROC   0x8000  /* Win32s process */
 
+/* Firmware table providers */
+#define ACPI 0x41435049
+#define FIRM 0x4649524D
+#define RSMB 0x52534D42
+
 static const WCHAR exeW[] = {'.','e','x','e',0};
 static const WCHAR comW[] = {'.','c','o','m',0};
 static const WCHAR batW[] = {'.','b','a','t',0};
@@ -4126,12 +4155,111 @@ HRESULT WINAPI UnregisterApplicationRestart(void)
     return S_OK;
 }
 
+static inline void copy_smbios_string(void **buffer, char *string, size_t string_size)
+{
+    if (!string) return;
+    strcpy(*buffer, string);
+    *buffer = (char*)(*buffer) + string_size;
+}
+
+#ifdef linux
+static char* get_smbios_string(const char *path, size_t *string_size)
+{
+    FILE *file = fopen(path, "r");
+    char *ret = NULL;
+    *string_size = 0;
+    if (file)
+    {
+        *string_size = getline(&ret, string_size, file) + 1;
+        fclose(file);
+        if (*string_size >= 2 && ret[*string_size - 2] == '\n')
+        {
+            ret[*string_size - 2] = 0;
+            (*string_size)--;
+        }
+        if (*string_size == 1)
+        {
+            free(ret);
+            ret = NULL;
+            *string_size = 0;
+        }
+    }
+    return ret;
+}
+#endif
+
 /***********************************************************************
  *           GetSystemFirmwareTable       (KERNEL32.@)
  */
 UINT WINAPI GetSystemFirmwareTable(DWORD provider, DWORD id, PVOID buffer, DWORD size)
 {
-    FIXME("(%d %d %p %d):stub\n", provider, id, buffer, size);
+    FIXME("(%08x %08x %p %d): semi-stub\n", provider, id, buffer, size);
+    switch (provider)
+    {
+        case RSMB:
+        {
+#ifdef linux
+            char *bios_manufacturer, *bios_version, *bios_date;
+            size_t bios_manufacturer_size, bios_version_size, bios_date_size;
+            size_t required_size = sizeof(struct smbios_prologue);
+            BYTE string_count;
+            struct smbios_prologue *prologue;
+            struct smbios_bios *bios;
+
+            bios_manufacturer = get_smbios_string("/sys/class/dmi/id/bios_vendor", &bios_manufacturer_size);
+            bios_version = get_smbios_string("/sys/class/dmi/id/bios_version", &bios_version_size);
+            bios_date = get_smbios_string("/sys/class/dmi/id/bios_date", &bios_date_size);
+
+            required_size += sizeof(struct smbios_bios);
+            if (bios_manufacturer_size || bios_version_size || bios_date_size)
+                required_size += bios_manufacturer_size + bios_version_size + bios_date_size + 1;
+            else
+                required_size += 2;
+
+            if (required_size > size)
+                return required_size;
+
+            prologue = (struct smbios_prologue*)buffer;
+            prologue->calling_method = 0;
+            prologue->major_version = 2;
+            prologue->minor_version = 0;
+            prologue->revision = 0;
+            prologue->length = required_size - sizeof(struct smbios_prologue);
+            buffer = (char*)buffer + sizeof(struct smbios_prologue);
+
+            string_count = 0;
+            bios = (struct smbios_bios*)buffer;
+            bios->type = 0;
+            bios->length = sizeof(struct smbios_bios);
+            bios->handle = 0;
+            bios->manufacturer = bios_manufacturer ? ++string_count : 0;
+            bios->version = bios_version ? ++string_count : 0;
+            bios->start = 0;
+            bios->date = bios_date ? ++string_count : 0;
+            bios->size = 0;
+            bios->characteristics = 0x4; /* not supported */
+            buffer = (char*)buffer + sizeof(struct smbios_bios);
+
+            if (string_count)
+            {
+                copy_smbios_string(&buffer, bios_manufacturer, bios_manufacturer_size);
+                copy_smbios_string(&buffer, bios_version, bios_version_size);
+                copy_smbios_string(&buffer, bios_date, bios_date_size);
+                memset(buffer, 0, 1);
+            }
+            else
+            {
+                memset(buffer, 0, 2);
+            }
+
+            free(bios_manufacturer);
+            free(bios_version);
+            free(bios_date);
+
+            return required_size;
+#endif
+        }
+    }
     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
     return 0;
 }
-- 
2.17.0