/**************************************************************************** * Copyright (c) 1998,2000 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ****************************************************************************/ /**************************************************************************** * Author: Thomas E. Dickey <dickey@clark.net> 1998,2000 * ****************************************************************************/ #include <curses.priv.h> #include <tic.h> MODULE_ID("$From: access.c,v 1.7 2000/12/10 02:55:07 tom Exp $") NCURSES_EXPORT(char *) _nc_basename(char *path) { char *result = strrchr(path, '/'); #ifdef __EMX__ if (result == 0) result = strrchr(path, '\\'); #endif if (result == 0) result = path; else result++; return result; } NCURSES_EXPORT(int) _nc_access(const char *path, int mode) { if (access(path, mode) < 0) { if ((mode & W_OK) != 0 && errno == ENOENT && strlen(path) < PATH_MAX) { char head[PATH_MAX]; char *leaf = _nc_basename(strcpy(head, path)); if (leaf == 0) leaf = head; *leaf = '\0'; if (head == leaf) (void) strcpy(head, "."); return access(head, R_OK | W_OK | X_OK); } return -1; } return 0; } #ifndef USE_ROOT_ENVIRON /* * Returns true if we allow application to use environment variables that are * used for searching lists of directories, etc. */ NCURSES_EXPORT(int) _nc_env_access(void) { #if HAVE_ISSETUGID if (issetugid()) return FALSE; #elif HAVE_GETEUID && HAVE_GETEGID if (getuid() != geteuid() || getgid() != getegid()) return FALSE; #endif return getuid() != 0 && geteuid() != 0; /* ...finally, disallow root */ } #endif