diff options
Diffstat (limited to 'ncurses-5.3/ncurses/tinfo/access.c')
| -rw-r--r-- | ncurses-5.3/ncurses/tinfo/access.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/ncurses-5.3/ncurses/tinfo/access.c b/ncurses-5.3/ncurses/tinfo/access.c new file mode 100644 index 0000000..9e67918 --- /dev/null +++ b/ncurses-5.3/ncurses/tinfo/access.c @@ -0,0 +1,123 @@ +/**************************************************************************** + * Copyright (c) 1998,2000,2001 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> 1998,2000,2001 * + ****************************************************************************/ + +#include <curses.priv.h> +#include <tic.h> +#include <nc_alloc.h> + +MODULE_ID("$Id$") + +#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 !defined(MIXEDCASE_FILENAMES) || defined(PROG_EXT) + static char *temp; + char *s; + + temp = strdup(result); + result = temp; +#if !defined(MIXEDCASE_FILENAMES) + int n; + 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; +} + +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 |