tasks a-s

Task/Program-name/C/program-name-4.c

@@ -0,0 +1,57 @@
+#include <windows.h>
+#include <stdlib.h>
+#include <wchar.h>
+
+/*
+ * Returns the path to the current executable file, in a newly
+ * allocated buffer. Use free() to free it.
+ */
+wchar_t *
+exepath(void)
+{
+	wchar_t *buf, *newbuf;
+	long blen, flen;
+
+	/*
+	 * Most paths fit in MAX_PATH == 260 characters, but very
+	 * long UNC paths might require a larger buffer.
+	 */
+	buf = NULL;
+	for (blen = MAX_PATH; 1; blen += MAX_PATH) {
+		/* Enlarge buffer. */
+		newbuf = realloc(buf, blen * sizeof buf[0]);
+		if (newbuf == NULL) {
+			free(buf);
+			return NULL;
+		}
+		buf = newbuf;
+
+		flen = GetModuleFileNameW(NULL, buf, blen);
+		if (flen == 0) {
+			free(buf);
+			return NULL;
+		}
+		if (flen < blen)
+			return buf;
+	}
+}
+
+/*
+ * Print the path to this executable.
+ */
+int
+main()
+{
+	wchar_t *path;
+
+	path = exepath();
+	if (path == NULL) {
+		wprintf(L"Sorry, an error occured.\n");
+		return 1;
+	}
+
+	wprintf(L"Path to executable: %ls\n", path);
+
+	free(path);
+	return 0;
+}