--- /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 ... */
+