log command line

sources/libcore/logger.cpp

@@ -1,5 +1,6 @@
 #include <chrono>
 #include <cstdio>
+#include <cstring>
 #include <ctime>
 #include <exception>
 
@@ -12,6 +13,7 @@
 #include <cage-core/debug.h>
 #include <cage-core/files.h>
 #include <cage-core/logger.h>
+#include <cage-core/scopeGuard.h>
 #include <cage-core/string.h>
 #include <cage-core/systemInformation.h>
 #include <cage-core/timer.h>
@@ -338,6 +340,35 @@ namespace cage
 
  namespace
  {
+ String fullCommandLineImpl()
+ {
+#ifdef CAGE_SYSTEM_WINDOWS
+ const char *p = GetCommandLine();
+ auto l = std::strlen(p);
+ if (l > String::MaxLength / 2)
+ l = String::MaxLength / 2;
+ return String(PointerRange(p, p + l));
+#else
+ FILE *fp = fopen("/proc/self/cmdline", "r");
+ if (!fp)
+ return "";
+ auto _ = ScopeGuard([fp]() { fclose(fp); });
+ String res;
+ while (res.length() < String::MaxLength / 2)
+ {
+ char c = 0;
+ auto l = fread(&c, 1, 1, fp);
+ if (l <= 0)
+ break;
+ CAGE_ASSERT(l == 1);
+ if (c == 0)
+ c = ' '; // /proc/self/cmdline contains null terminators for each parameter
+ res += String(c);
+ }
+ return res;
+#endif // CAGE_SYSTEM_WINDOWS
+ }
+
  class InitialLog : private Immovable
  {
  public:
@@ -384,6 +415,7 @@ namespace cage
  CAGE_LOG(SeverityEnum::Info, "log", Stringizer() + "current time: " + buffer);
  }
 
+ CAGE_LOG(SeverityEnum::Info, "log", Stringizer() + "command line: " + fullCommandLineImpl());
  CAGE_LOG(SeverityEnum::Info, "log", Stringizer() + "executable path: " + detail::executableFullPath());
  CAGE_LOG(SeverityEnum::Info, "log", Stringizer() + "working directory: " + pathWorkingDir());