/* * Unix support routines for PhysicsFS. * * Please see the file LICENSE in the source's root directory. * * This file written by Ryan C. Gordon. */ #if HAVE_CONFIG_H # include #endif #if (!defined __BEOS__) /* BeOS uses beos.cpp and posix.c ... */ #if ((defined __APPLE__) && (defined __MACH__)) # if (!defined __DARWIN__) # define __DARWIN__ # endif #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #if (!defined __DARWIN__) #include #else #include #endif #include #define __PHYSICSFS_INTERNAL__ #include "physfs_internal.h" const char *__PHYSFS_platformDirSeparator = "/"; int __PHYSFS_platformInit(void) { return(1); /* always succeed. */ } /* __PHYSFS_platformInit */ int __PHYSFS_platformDeinit(void) { return(1); /* always succeed. */ } /* __PHYSFS_platformDeinit */ #if (defined __DARWIN__) char **__PHYSFS_platformDetectAvailableCDs(void) { char **retval = (char **) malloc(sizeof (char *)); int cd_count = 1; /* We count the NULL entry. */ struct statfs* mntbufp = NULL; int mounts; int ii; BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL); mounts = getmntinfo( &mntbufp, MNT_WAIT ); for ( ii=0; ii < mounts; ++ii ) { int add_it = 0; if ( strcmp( mntbufp[ii].f_fstypename, "iso9660") == 0 ) add_it = 1; else if ( strcmp( mntbufp[ii].f_fstypename, "cd9660") == 0 ) add_it = 1; /* add other mount types here */ if (add_it) { char **tmp = realloc(retval, sizeof (char *) * cd_count + 1); if (tmp) { retval = tmp; retval[cd_count-1] = (char *) malloc(strlen(mntbufp[ ii ].f_mntonname) + 1); if (retval[cd_count-1]) { strcpy(retval[cd_count-1], mntbufp[ ii ].f_mntonname); cd_count++; } /* if */ } /* if */ } /* if */ } free( mntbufp ); retval[cd_count - 1] = NULL; return(retval); } /* __PHYSFS_platformDetectAvailableCDs */ #else /* non-Darwin implementation... */ char **__PHYSFS_platformDetectAvailableCDs(void) { char **retval = (char **) malloc(sizeof (char *)); int cd_count = 1; /* We count the NULL entry. */ FILE *mounts = NULL; struct mntent *ent = NULL; BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL); *retval = NULL; mounts = setmntent("/etc/mtab", "r"); BAIL_IF_MACRO(mounts == NULL, ERR_IO_ERROR, retval); while ( (ent = getmntent(mounts)) != NULL ) { int add_it = 0; if (strcmp(ent->mnt_type, "iso9660") == 0) add_it = 1; /* add other mount types here */ if (add_it) { char **tmp = realloc(retval, sizeof (char *) * cd_count + 1); if (tmp) { retval = tmp; retval[cd_count-1] = (char *) malloc(strlen(ent->mnt_dir) + 1); if (retval[cd_count-1]) { strcpy(retval[cd_count-1], ent->mnt_dir); cd_count++; } /* if */ } /* if */ } /* if */ } /* while */ endmntent(mounts); retval[cd_count - 1] = NULL; return(retval); } /* __PHYSFS_platformDetectAvailableCDs */ #endif /* this is in posix.c ... */ extern char *__PHYSFS_platformCopyEnvironmentVariable(const char *varname); /* * 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 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; BAIL_IF_MACRO(bin == NULL, ERR_INVALID_ARGUMENT, NULL); BAIL_IF_MACRO(envr == NULL, ERR_INVALID_ARGUMENT, NULL); do { size_t size; ptr = strchr(start, ':'); /* find next $PATH separator. */ if (ptr) *ptr = '\0'; size = strlen(start) + strlen(bin) + 2; if (size > alloc_size) { char *x = (char *) realloc(exe, size); if (x == NULL) { if (exe != NULL) free(exe); BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL); } /* if */ alloc_size = size; exe = x; } /* if */ /* build full binary path... */ strcpy(exe, start); if (exe[strlen(exe) - 1] != '/') strcat(exe, "/"); strcat(exe, bin); if (access(exe, X_OK) == 0) /* Exists as executable? We're done. */ { strcpy(exe, start); /* i'm lazy. piss off. */ return(exe); } /* if */ start = ptr + 1; /* start points to beginning of next element. */ } while (ptr != NULL); if (exe != NULL) free(exe); return(NULL); /* doesn't exist in path. */ } /* findBinaryInPath */ char *__PHYSFS_platformCalcBaseDir(const char *argv0) { /* If there isn't a path on argv0, then look through the $PATH for it. */ char *retval; char *envr; if (strchr(argv0, '/') != NULL) /* default behaviour can handle this. */ return(NULL); envr = __PHYSFS_platformCopyEnvironmentVariable("PATH"); BAIL_IF_MACRO(!envr, NULL, NULL); retval = findBinaryInPath(argv0, envr); free(envr); return(retval); } /* __PHYSFS_platformCalcBaseDir */ PHYSFS_uint64 __PHYSFS_platformGetThreadID(void) { return((PHYSFS_uint64) ((PHYSFS_uint32) pthread_self())); } /* __PHYSFS_platformGetThreadID */ /* Much like my college days, try to sleep for 10 milliseconds at a time... */ void __PHYSFS_platformTimeslice(void) { usleep( 10 * 1000 ); /* don't care if it fails. */ } /* __PHYSFS_platformTimeslice */ char *__PHYSFS_platformRealPath(const char *path) { char resolved_path[MAXPATHLEN]; char *retval = NULL; errno = 0; BAIL_IF_MACRO(!realpath(path, resolved_path), strerror(errno), NULL); retval = (char *) malloc(strlen(resolved_path) + 1); BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL); strcpy(retval, resolved_path); return(retval); } /* __PHYSFS_platformRealPath */ void *__PHYSFS_platformCreateMutex(void) { int rc; pthread_mutex_t *m = (pthread_mutex_t *) malloc(sizeof (pthread_mutex_t)); BAIL_IF_MACRO(m == NULL, ERR_OUT_OF_MEMORY, NULL); rc = pthread_mutex_init(m, NULL); if (rc != 0) { free(m); BAIL_MACRO(strerror(rc), NULL); } /* if */ return((void *) m); } /* __PHYSFS_platformCreateMutex */ void __PHYSFS_platformDestroyMutex(void *mutex) { pthread_mutex_destroy((pthread_mutex_t *) mutex); free(mutex); } /* __PHYSFS_platformDestroyMutex */ int __PHYSFS_platformGrabMutex(void *mutex) { return(pthread_mutex_lock((pthread_mutex_t *) mutex) == 0); } /* __PHYSFS_platformGrabMutex */ void __PHYSFS_platformReleaseMutex(void *mutex) { pthread_mutex_unlock((pthread_mutex_t *) mutex); } /* __PHYSFS_platformReleaseMutex */ #endif /* !defined __BEOS__ */ /* end of unix.c ... */