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Try to make sense of steam's multiple library paths on linux. 

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@6155 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike 2022-01-08 10:00:55 +00:00
parent 2e108f2a99
commit 310bf64d83
1 changed files with 58 additions and 13 deletions
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71
engine/common/fs.c
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@ -5129,32 +5129,77 @@ qboolean Sys_FindGameData(const char *poshname, const char *gamename, char *base
#if defined(__linux__) || defined(__unix__) || defined(__apple__)
#include <sys/stat.h>
static qboolean Sys_SteamLibraryHasFile(char *basepath, int basepathlen, char *librarypath, char *steamdir, char *fname) //returns the base system path
{
Q_snprintfz(basepath, basepathlen, "%s/steamapps/common/%s", librarypath, steamdir);
if (0==access(va("%s/%s", basepath, fname), R_OK))
return true;
return false;
}
static qboolean Sys_SteamParseLibraries(char *basepath, int basepathlen, char *libraryfile, char *steamdir, char *fname) //returns the base system path
{
qboolean success = false;
char key[1024], *end;
char value[1024];
char *lib = libraryfile;
int depth = 0;
if (!libraryfile)
return false;
lib = COM_ParseCString(lib, key, sizeof(key), NULL);
lib = COM_ParseCString(lib, value, sizeof(value), NULL);
if (!strcmp(key, "libraryfolders") && !strcmp(value, "{"))
{
depth=1;
while(lib && !success)
{
lib = COM_ParseCString(lib, key, sizeof(key), NULL);
if (!strcmp(key, "}"))
{
if (!--depth)
break;
continue;
}
lib = COM_ParseCString(lib, value, sizeof(value), NULL);
if (!strcmp(value, "{"))
depth++;
else if (depth == 1 && *key)
{ //older format...
strtoul(key, &end, 10);
if (!*end)
{
//okay, its strictly base10
if (Sys_SteamLibraryHasFile(basepath, basepathlen, value, steamdir,fname))
success = true;
}
}
else if (depth == 2 && !strcmp(key, "path"))
{ //newer format...
if (Sys_SteamLibraryHasFile(basepath, basepathlen, value, steamdir,fname))
success = true;
}
}
}
FS_FreeFile(libraryfile);
return success;
}
static qboolean Sys_SteamHasFile(char *basepath, int basepathlen, char *steamdir, char *fname) //returns the base system path
{
/*
Find where Valve's Steam distribution platform is installed.
Then take a look at that location for the relevent installed app.
*/
//FIXME: we ought to parse steamapps/libraryfolders.vdf (json) and read the "1" etc for games installed on different drives. default drive only for now.
FILE *f;
char *userhome = getenv("HOME");
if (userhome && *userhome)
{
Q_snprintfz(basepath, basepathlen, "%s/.steam/steam/steamapps/common/%s", userhome, steamdir);
if ((f = fopen(va("%s/%s", basepath, fname), "rb")))
{
fclose(f);
Q_snprintfz(basepath, basepathlen, "%s/.steam/steam/steamapps/libraryfolders.vdf", userhome);
if (Sys_SteamParseLibraries(basepath, basepathlen, FS_MallocFile(basepath, FS_SYSTEM, NULL), steamdir, fname))
return true;
}
//steam apparently used to be more standard, or something? FIXME: yet still not xdg? no idea.
Q_snprintfz(basepath, basepathlen, "%s/.local/share/Steam/SteamApps/common/%s", userhome, steamdir);
if ((f = fopen(va("%s/%s", basepath, fname), "rb")))
{
fclose(f);
Q_snprintfz(basepath, basepathlen, "%s/.local/share/Steam/SteamApps/libraryfolders.vdf", userhome);
if (Sys_SteamParseLibraries(basepath, basepathlen, FS_MallocFile(basepath, FS_SYSTEM, NULL), steamdir, fname))
return true;
}
}
return false;
}