diff -r d1ea9b3f543e -r 13e2037ebc79 misc/physfs/src/platform_unix.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/physfs/src/platform_unix.c	Sat Oct 20 00:20:39 2012 +0400
@@ -0,0 +1,344 @@
+/*
+ * Unix support routines for PhysicsFS.
+ *
+ * Please see the file LICENSE.txt in the source's root directory.
+ *
+ *  This file written by Ryan C. Gordon.
+ */
+
+#define __PHYSICSFS_INTERNAL__
+#include "physfs_platforms.h"
+
+#ifdef PHYSFS_PLATFORM_UNIX
+
+#include <ctype.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <dirent.h>
+#include <time.h>
+#include <errno.h>
+
+#if PHYSFS_PLATFORM_LINUX && !defined(PHYSFS_HAVE_MNTENT_H)
+#define PHYSFS_HAVE_MNTENT_H 1
+#elif PHYSFS_PLATFORM_SOLARIS && !defined(PHYSFS_HAVE_SYS_MNTTAB_H)
+#define PHYSFS_HAVE_SYS_MNTTAB_H 1
+#elif PHYSFS_PLATFORM_BSD && !defined(PHYSFS_HAVE_SYS_UCRED_H)
+#define PHYSFS_HAVE_SYS_UCRED_H 1
+#endif
+
+#ifdef PHYSFS_HAVE_SYS_UCRED_H
+#  ifdef PHYSFS_HAVE_MNTENT_H
+#    undef PHYSFS_HAVE_MNTENT_H /* don't do both... */
+#  endif
+#  include <sys/mount.h>
+#  include <sys/ucred.h>
+#endif
+
+#ifdef PHYSFS_HAVE_MNTENT_H
+#include <mntent.h>
+#endif
+
+#ifdef PHYSFS_HAVE_SYS_MNTTAB_H
+#include <sys/mnttab.h>
+#endif
+
+#include "physfs_internal.h"
+
+int __PHYSFS_platformInit(void)
+{
+    return 1;  /* always succeed. */
+} /* __PHYSFS_platformInit */
+
+
+int __PHYSFS_platformDeinit(void)
+{
+    return 1;  /* always succeed. */
+} /* __PHYSFS_platformDeinit */
+
+
+/* Stub version for platforms without CD-ROM support. */
+void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
+{
+#if (defined PHYSFS_NO_CDROM_SUPPORT)
+    /* no-op. */
+
+#elif (defined PHYSFS_HAVE_SYS_UCRED_H)
+    int i;
+    struct statfs *mntbufp = NULL;
+    int mounts = getmntinfo(&mntbufp, MNT_WAIT);
+
+    for (i = 0; i < mounts; i++)
+    {
+        int add_it = 0;
+
+        if (strcmp(mntbufp[i].f_fstypename, "iso9660") == 0)
+            add_it = 1;
+        else if (strcmp( mntbufp[i].f_fstypename, "cd9660") == 0)
+            add_it = 1;
+
+        /* add other mount types here */
+
+        if (add_it)
+            cb(data, mntbufp[i].f_mntonname);
+    } /* for */
+
+#elif (defined PHYSFS_HAVE_MNTENT_H)
+    FILE *mounts = NULL;
+    struct mntent *ent = NULL;
+
+    mounts = setmntent("/etc/mtab", "r");
+    BAIL_IF_MACRO(mounts == NULL, PHYSFS_ERR_IO, /*return void*/);
+
+    while ( (ent = getmntent(mounts)) != NULL )
+    {
+        int add_it = 0;
+        if (strcmp(ent->mnt_type, "iso9660") == 0)
+            add_it = 1;
+        else if (strcmp(ent->mnt_type, "udf") == 0)
+            add_it = 1;
+
+        /* !!! FIXME: these might pick up floppy drives, right? */
+        else if (strcmp(ent->mnt_type, "auto") == 0)
+            add_it = 1;
+        else if (strcmp(ent->mnt_type, "supermount") == 0)
+            add_it = 1;
+
+        /* !!! FIXME: udf? automount? */
+
+        /* add other mount types here */
+
+        if (add_it)
+            cb(data, ent->mnt_dir);
+    } /* while */
+
+    endmntent(mounts);
+
+#elif (defined PHYSFS_HAVE_SYS_MNTTAB_H)
+    FILE *mounts = fopen(MNTTAB, "r");
+    struct mnttab ent;
+
+    BAIL_IF_MACRO(mounts == NULL, PHYSFS_ERR_IO, /*return void*/);
+    while (getmntent(mounts, &ent) == 0)
+    {
+        int add_it = 0;
+        if (strcmp(ent.mnt_fstype, "hsfs") == 0)
+            add_it = 1;
+
+        /* add other mount types here */
+
+        if (add_it)
+            cb(data, ent.mnt_mountp);
+    } /* while */
+
+    fclose(mounts);
+
+#else
+#error Unknown platform. Should have defined PHYSFS_NO_CDROM_SUPPORT, perhaps.
+#endif
+} /* __PHYSFS_platformDetectAvailableCDs */
+
+
+/*
+ * See where program (bin) resides in the $PATH specified by (envr).
+ *  returns a copy of the first element in envr that contains it, or NULL
+ *  if it doesn't exist or there were other problems. PHYSFS_SetError() is
+ *  called if we have a problem.
+ *
+ * (envr) will be scribbled over, and you are expected to allocator.Free() the
+ *  return value when you're done with it.
+ */
+static char *findBinaryInPath(const char *bin, char *envr)
+{
+    size_t alloc_size = 0;
+    char *exe = NULL;
+    char *start = envr;
+    char *ptr;
+
+    assert(bin != NULL);
+    assert(envr != NULL);
+
+    do
+    {
+        size_t size;
+        size_t binlen;
+
+        ptr = strchr(start, ':');  /* find next $PATH separator. */
+        if (ptr)
+            *ptr = '\0';
+
+        binlen = strlen(bin);
+        size = strlen(start) + binlen + 2;
+        if (size > alloc_size)
+        {
+            char *x = (char *) allocator.Realloc(exe, size);
+            if (!x)
+            {
+                if (exe != NULL)
+                    allocator.Free(exe);
+                BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+            } /* if */
+
+            alloc_size = size;
+            exe = x;
+        } /* if */
+
+        /* build full binary path... */
+        strcpy(exe, start);
+        if ((exe[0] == '\0') || (exe[strlen(exe) - 1] != '/'))
+            strcat(exe, "/");
+        strcat(exe, bin);
+
+        if (access(exe, X_OK) == 0)  /* Exists as executable? We're done. */
+        {
+            exe[size - binlen] = '\0'; /* chop off filename, leave '/' */
+            return exe;
+        } /* if */
+
+        start = ptr + 1;  /* start points to beginning of next element. */
+    } while (ptr != NULL);
+
+    if (exe != NULL)
+        allocator.Free(exe);
+
+    return NULL;  /* doesn't exist in path. */
+} /* findBinaryInPath */
+
+
+static char *readSymLink(const char *path)
+{
+    ssize_t len = 64;
+    ssize_t rc = -1;
+    char *retval = NULL;
+
+    while (1)
+    {
+         char *ptr = (char *) allocator.Realloc(retval, (size_t) len);
+         if (ptr == NULL)
+             break;   /* out of memory. */
+         retval = ptr;
+
+         rc = readlink(path, retval, len);
+         if (rc == -1)
+             break;  /* not a symlink, i/o error, etc. */
+
+         else if (rc < len)
+         {
+             retval[rc] = '\0';  /* readlink doesn't null-terminate. */
+             return retval;  /* we're good to go. */
+         } /* else if */
+
+         len *= 2;  /* grow buffer, try again. */
+    } /* while */
+
+    if (retval != NULL)
+        allocator.Free(retval);
+    return NULL;
+} /* readSymLink */
+
+
+char *__PHYSFS_platformCalcBaseDir(const char *argv0)
+{
+    char *retval = NULL;
+    const char *envr = NULL;
+
+    /*
+     * Try to avoid using argv0 unless forced to. If there's a Linux-like
+     *  /proc filesystem, you can get the full path to the current process from
+     *  the /proc/self/exe symlink.
+     */
+    retval = readSymLink("/proc/self/exe");
+    if (retval == NULL)
+    {
+        /* older kernels don't have /proc/self ... try PID version... */
+        const unsigned long long pid = (unsigned long long) getpid();
+        char path[64];
+        const int rc = (int) snprintf(path,sizeof(path),"/proc/%llu/exe",pid);
+        if ( (rc > 0) && (rc < sizeof(path)) )
+            retval = readSymLink(path);
+    } /* if */
+
+    if (retval != NULL)  /* chop off filename. */
+    {
+        char *ptr = strrchr(retval, '/');
+        if (ptr != NULL)
+            *(ptr+1) = '\0';
+        else  /* shouldn't happen, but just in case... */
+        {
+            allocator.Free(retval);
+            retval = NULL;
+        } /* else */
+    } /* if */
+
+    /* No /proc/self/exe, but we have an argv[0] we can parse? */
+    if ((retval == NULL) && (argv0 != NULL))
+    {
+        /* fast path: default behaviour can handle this. */
+        if (strchr(argv0, '/') != NULL)
+            return NULL;  /* higher level parses out real path from argv0. */
+
+        /* If there's no dirsep on argv0, then look through $PATH for it. */
+        envr = getenv("PATH");
+        if (envr != NULL)
+        {
+            char *path = (char *) __PHYSFS_smallAlloc(strlen(envr) + 1);
+            BAIL_IF_MACRO(!path, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+            strcpy(path, envr);
+            retval = findBinaryInPath(argv0, path);
+            __PHYSFS_smallFree(path);
+        } /* if */
+    } /* if */
+
+    if (retval != NULL)
+    {
+        /* try to shrink buffer... */
+        char *ptr = (char *) allocator.Realloc(retval, strlen(retval) + 1);
+        if (ptr != NULL)
+            retval = ptr;  /* oh well if it failed. */
+    } /* if */
+
+    return retval;
+} /* __PHYSFS_platformCalcBaseDir */
+
+
+char *__PHYSFS_platformCalcPrefDir(const char *org, const char *app)
+{
+    /*
+     * We use XDG's base directory spec, even if you're not on Linux.
+     *  This isn't strictly correct, but the results are relatively sane
+     *  in any case.
+     *
+     * http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+     */
+    const char *envr = getenv("XDG_DATA_HOME");
+    const char *append = "/";
+    char *retval = NULL;
+    size_t len = 0;
+
+    if (!envr)
+    {
+        /* You end up with "$HOME/.local/share/Game Name 2" */
+        envr = __PHYSFS_getUserDir();
+        BAIL_IF_MACRO(!envr, ERRPASS, NULL);  /* oh well. */
+        append = ".local/share/";
+    } /* if */
+
+    len = strlen(envr) + strlen(append) + strlen(app) + 2;
+    retval = (char *) allocator.Malloc(len);
+    BAIL_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+    snprintf(retval, len, "%s%s%s/", envr, append, app);
+    return retval;
+} /* __PHYSFS_platformCalcPrefDir */
+
+
+int __PHYSFS_platformSetDefaultAllocator(PHYSFS_Allocator *a)
+{
+    return 0;  /* just use malloc() and friends. */
+} /* __PHYSFS_platformSetDefaultAllocator */
+
+#endif /* PHYSFS_PLATFORM_UNIX */
+
+/* end of unix.c ... */
+