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-rw-r--r--ncurses/tinfo/access.c176
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diff --git a/ncurses/tinfo/access.c b/ncurses/tinfo/access.c
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+/****************************************************************************
+ * Copyright (c) 1998-2006,2007 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 *
+ ****************************************************************************/
+
+#include <curses.priv.h>
+
+#include <ctype.h>
+#include <sys/stat.h>
+
+#include <tic.h>
+#include <nc_alloc.h>
+
+MODULE_ID("$Id: access.c,v 1.14 2007/11/18 00:57:53 tom Exp $")
+
+#define LOWERCASE(c) ((isalpha(UChar(c)) && isupper(UChar(c))) ? tolower(UChar(c)) : (c))
+
+NCURSES_EXPORT(char *)
+_nc_rootname(char *path)
+{
+ char *result = _nc_basename(path);
+#if !MIXEDCASE_FILENAMES || defined(PROG_EXT)
+ static char *temp;
+ char *s;
+
+ temp = strdup(result);
+ result = temp;
+#if !MIXEDCASE_FILENAMES
+ for (s = result; *s != '\0'; ++s) {
+ *s = LOWERCASE(*s);
+ }
+#endif
+#if defined(PROG_EXT)
+ if ((s = strrchr(result, '.')) != 0) {
+ if (!strcmp(s, PROG_EXT))
+ *s = '\0';
+ }
+#endif
+#endif
+ return result;
+}
+
+/*
+ * Check if a string appears to be an absolute pathname.
+ */
+NCURSES_EXPORT(bool)
+_nc_is_abs_path(const char *path)
+{
+#if defined(__EMX__) || defined(__DJGPP__)
+#define is_pathname(s) ((((s) != 0) && ((s)[0] == '/')) \
+ || (((s)[0] != 0) && ((s)[1] == ':')))
+#else
+#define is_pathname(s) ((s) != 0 && (s)[0] == '/')
+#endif
+ return is_pathname(path);
+}
+
+/*
+ * Return index of the basename
+ */
+NCURSES_EXPORT(unsigned)
+_nc_pathlast(const char *path)
+{
+ const char *test = strrchr(path, '/');
+#ifdef __EMX__
+ if (test == 0)
+ test = strrchr(path, '\\');
+#endif
+ if (test == 0)
+ test = path;
+ else
+ test++;
+ return (test - path);
+}
+
+NCURSES_EXPORT(char *)
+_nc_basename(char *path)
+{
+ return path + _nc_pathlast(path);
+}
+
+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;
+}
+
+NCURSES_EXPORT(bool)
+_nc_is_dir_path(const char *path)
+{
+ bool result = FALSE;
+ struct stat sb;
+
+ if (stat(path, &sb) == 0
+ && (sb.st_mode & S_IFMT) == S_IFDIR) {
+ result = TRUE;
+ }
+ return result;
+}
+
+NCURSES_EXPORT(bool)
+_nc_is_file_path(const char *path)
+{
+ bool result = FALSE;
+ struct stat sb;
+
+ if (stat(path, &sb) == 0
+ && (sb.st_mode & S_IFMT) == S_IFREG) {
+ result = TRUE;
+ }
+ return result;
+}
+
+#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