Look in the executable's dir for another config file

On Windows it'll look for alsoft.ini, and elsewhere is alsoft.conf. This
applies after the user-local settings and before ALSOFT_CONF.

Alc/alcConfig.c

@@ -313,6 +313,7 @@ void ReadALConfig(void)
 {
     WCHAR buffer[PATH_MAX];
     const WCHAR *str;
+    al_string ppath;
     FILE *f;
 
     if(SHGetSpecialFolderPathW(NULL, buffer, CSIDL_APPDATA, FALSE) != FALSE)
@@ -331,6 +332,19 @@ void ReadALConfig(void)
         al_string_deinit(&filepath);
     }
 
+    ppath = GetProcPath();
+    if(!al_string_empty(ppath))
+    {
+        al_string_append_cstr(&ppath, "\\alsoft.ini");
+        TRACE("Loading config %s...\n", al_string_get_cstr(ppath));
+        f = al_fopen(al_string_get_cstr(ppath), "r");
+        if(f)
+        {
+            LoadConfigFromFile(f);
+            fclose(f);
+        }
+    }
+
     if((str=_wgetenv(L"ALSOFT_CONF")) != NULL && *str)
     {
         al_string filepath = AL_STRING_INIT_STATIC();
@@ -345,12 +359,15 @@ void ReadALConfig(void)
         }
         al_string_deinit(&filepath);
     }
+
+    al_string_deinit(&ppath);
 }
 #else
 void ReadALConfig(void)
 {
     char buffer[PATH_MAX];
     const char *str;
+    al_string ppath;
     FILE *f;
 
     str = "/etc/openal/alsoft.conf";
@@ -430,6 +447,19 @@ void ReadALConfig(void)
         }
     }
 
+    ppath = GetProcPath();
+    if(!al_string_empty(ppath))
+    {
+        al_string_append_cstr(&ppath, "/alsoft.conf");
+        TRACE("Loading config %s...\n", al_string_get_cstr(ppath));
+        f = al_fopen(al_string_get_cstr(ppath), "r");
+        if(f)
+        {
+            LoadConfigFromFile(f);
+            fclose(f);
+        }
+    }
+
     if((str=getenv("ALSOFT_CONF")) != NULL && *str)
     {
         TRACE("Loading config %s...\n", str);
@@ -440,6 +470,8 @@ void ReadALConfig(void)
             fclose(f);
         }
     }
+
+    al_string_deinit(&ppath);
 }
 #endif
 

Alc/compat.h

@@ -1,6 +1,8 @@
 #ifndef AL_COMPAT_H
 #define AL_COMPAT_H
 
+#include "alstring.h"
+
 #ifdef _WIN32
 
 #define WIN32_LEAN_AND_MEAN
@@ -23,6 +25,8 @@ FILE *al_fopen(const char *fname, const char *mode);
 
 #endif
 
+al_string GetProcPath(void);
+
 #ifdef HAVE_DYNLOAD
 void *LoadLib(const char *name);
 void CloseLib(void *handle);

Alc/helpers.c

@@ -321,6 +321,57 @@ static int StringSortCompare(const void *str1, const void *str2)
 
 #ifdef _WIN32
 
+static WCHAR *strrchrW(WCHAR *str, WCHAR ch)
+{
+    WCHAR *ret = NULL;
+    while(*str)
+    {
+        if(*str == ch)
+            ret = str;
+        ++str;
+    }
+    return ret;
+}
+
+al_string GetProcPath(void)
+{
+    al_string ret = AL_STRING_INIT_STATIC();
+    WCHAR *pathname, *sep;
+    DWORD pathlen;
+    DWORD len;
+
+    pathlen = 256;
+    pathname = malloc(pathlen * sizeof(pathname[0]));
+    while(pathlen > 0 && (len=GetModuleFileNameW(NULL, pathname, pathlen)) == pathlen)
+    {
+        free(pathname);
+        pathlen <<= 1;
+        pathname = malloc(pathlen * sizeof(pathname[0]));
+    }
+    if(len == 0)
+    {
+        free(pathname);
+        ERR("Failed to get process name: error %lu\n", GetLastError());
+        return ret;
+    }
+
+    pathname[len] = 0;
+    if((sep = strrchrW(pathname, '\\')))
+    {
+        WCHAR *sep2 = strrchrW(pathname, '/');
+        if(sep2) *sep2 = 0;
+        else *sep = 0;
+    }
+    else if((sep = strrchrW(pathname, '/')))
+        *sep = 0;
+    al_string_copy_wcstr(&ret, pathname);
+    free(pathname);
+
+    TRACE("Got: %s\n", al_string_get_cstr(ret));
+    return ret;
+}
+
+
 static WCHAR *FromUTF8(const char *str)
 {
     WCHAR *out = NULL;
@@ -549,6 +600,52 @@ vector_al_string SearchDataFiles(const char *ext, const char *subdir)
 
 #else
 
+al_string GetProcPath(void)
+{
+    al_string ret = AL_STRING_INIT_STATIC();
+    const char *fname;
+    char *pathname, *sep;
+    size_t pathlen;
+    ssize_t len;
+
+    pathlen = 256;
+    pathname = malloc(pathlen);
+
+    fname = "/proc/self/exe";
+    len = readlink(fname, pathname, pathlen);
+    if(len == -1 && errno == ENOENT)
+    {
+        fname = "/proc/self/file";
+        len = readlink(fname, pathname, pathlen);
+    }
+
+    while(len > 0 && (size_t)len == pathlen)
+    {
+        free(pathname);
+        pathlen <<= 1;
+        pathname = malloc(pathlen);
+        len = readlink(fname, pathname, pathlen);
+    }
+    if(len <= 0)
+    {
+        free(pathname);
+        ERR("Failed to link %s: %s\n", fname, strerror(errno));
+        return ret;
+    }
+
+    pathname[len] = 0;
+    sep = strrchr(pathname, '/');
+    if(sep)
+        al_string_copy_range(&ret, pathname, sep);
+    else
+        al_string_copy_cstr(&ret, pathname);
+    free(pathname);
+
+    TRACE("Got: %s\n", al_string_get_cstr(ret));
+    return ret;
+}
+
+
 #ifdef HAVE_DLFCN_H
 
 void *LoadLib(const char *name)