TerminalShell: add support for Windows

src/common/processing_windows.c

@@ -0,0 +1,69 @@
+#include "fastfetch.h"
+#include "common/processing.h"
+
+#define WIN32_LEAN_AND_MEAN 1
+#include <Windows.h>
+
+//We can't use this native version yet because we still use POSIX path ( eg /usr/bin/fish ) at a lot of places.
+const char* ffProcessAppendStdOut(FFstrbuf* buffer, char* const argv[])
+{
+    SECURITY_ATTRIBUTES saAttr = {
+        .nLength = sizeof(SECURITY_ATTRIBUTES),
+        .lpSecurityDescriptor = NULL,
+        .bInheritHandle = TRUE,
+    };
+
+    HANDLE hChildStdoutRead, hChildStdoutWrite;
+    if (!CreatePipe(&hChildStdoutRead, &hChildStdoutWrite, &saAttr, 0))
+        return "CreatePipe() failed";
+
+    if (!SetHandleInformation(hChildStdoutRead, HANDLE_FLAG_INHERIT, 0))
+        return "SetHandleInformation(hChildStdoutRead) failed";
+
+    PROCESS_INFORMATION piProcInfo = {0};
+    STARTUPINFOA siStartInfo = {
+        .cb = sizeof(siStartInfo),
+        .dwFlags = STARTF_USESTDHANDLES,
+        .hStdOutput = hChildStdoutWrite,
+    };
+
+    FFstrbuf cmdline;
+    ffStrbufInit(&cmdline);
+    for(char* const* parg = argv; *parg; ++parg)
+    {
+        if(cmdline.length > 0)
+            ffStrbufAppendC(&cmdline, ' ');
+        ffStrbufAppendF(&cmdline, "\"%s\"", * parg);
+    }
+
+    BOOL success = CreateProcessA(
+        NULL,          // application name
+        cmdline.chars, // command line
+        NULL,          // process security attributes
+        NULL,          // primary thread security attributes
+        TRUE,          // handles are inherited
+        0,             // creation flags
+        NULL,          // use parent's environment
+        NULL,          // use parent's current directory
+        &siStartInfo,  // STARTUPINFO pointer
+        &piProcInfo);  // receives PROCESS_INFORMATION
+
+    CloseHandle(hChildStdoutWrite);
+    if(!success)
+    {
+        CloseHandle(hChildStdoutRead);
+        return "CreateProcessA() failed";
+    }
+
+    char str[128];
+    DWORD nRead;
+    while(ReadFile(hChildStdoutRead, str, sizeof(str), &nRead, NULL) && nRead > 0)
+    {
+        ffStrbufAppendNS(buffer, nRead, str);
+        if(nRead < sizeof(str))
+            break;
+    }
+
+    CloseHandle(hChildStdoutRead);
+    return NULL;
+}