Clean up gameinfo_init() and other random stuff

- Just ask the engine for the game directory instead of doing the stupid
  argv sniffing hacks from the early days of trying to get the damn
  thing working.

- Also add some other path variables, functions and whatnot, and do some
  other minor tidying up.

- Also also, another damn copyright year, somebody please help me.

Unfortunate negative effect off this change: con_init() no longer
reports the game name, because it has to happen before gameinfo_init().
I've decided I don't really care, though.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/os-unix.h b/src/os-unix.h
index 3b63bcc..6522029 100644
--- a/src/os-unix.h
+++ b/src/os-unix.h
@@ -35,6 +35,7 @@ typedef char os_char;
 #define os_access access
 #define os_stat stat
 #define os_getenv getenv
+#define os_getcwd getcwd
 
 #define OS_DLSUFFIX ".so"
 
@@ -42,6 +43,16 @@ typedef char os_char;
 
 #define os_dlsym dlsym
 
+static inline bool os_dlfile(void *m, char *buf, int sz) {
+	// NOTE: this might be linux/glibc-specific (I haven't checked every
+	// implementation). this is fine as we don't use it in any build-time code,
+	// only in the plugin itself. just keep it in mind!
+	struct link_map *lm = m;
+	ssz len = strlen(lm->l_name) + 1;
+	if (ssz > sz) { errno = ENAMETOOLONG; return false; }
+	memcpy(buf, lm->l_name, ssz); return true;
+}
+
 // unix mprot flags are much nicer but cannot be defined in terms of the windows
 // ones, so we use the windows ones and define them in terms of the unix ones.
 // another victory for stupid!