diff options
Diffstat (limited to 'lib/euidaccess.c')
| -rw-r--r-- | lib/euidaccess.c | 70 |
1 files changed, 35 insertions, 35 deletions
diff --git a/lib/euidaccess.c b/lib/euidaccess.c index 5148a5b..82af941 100644 --- a/lib/euidaccess.c +++ b/lib/euidaccess.c @@ -1,36 +1,37 @@ /* euidaccess -- check if effective user id can access file - Copyright (C) 1990, 1991, 1995, 1998, 2000, 2003, 2004, 2005, 2006 - Free Software Foundation, Inc. + Copyright (C) 1990-1991, 1995, 1998, 2000, 2003-2006, 2008-2016 Free + Software Foundation, Inc. This file is part of the GNU C Library. - This program is free software; you can redistribute it and/or modify + This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - You should have received a copy of the GNU General Public License along - with this program; if not, write to the Free Software Foundation, - Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* Written by David MacKenzie and Torbjorn Granlund. Adapted for GNU C library by Roland McGrath. */ #ifndef _LIBC # include <config.h> -# include "euidaccess.h" #endif +#include <fcntl.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> +#include "root-uid.h" + #if HAVE_LIBGEN_H # include <libgen.h> #endif @@ -64,14 +65,10 @@ # undef stat # define stat stat64 -#else - -# include "group-member.h" - #endif /* Return 0 if the user has permission of type MODE on FILE; - otherwise, return -1 and set `errno'. + otherwise, return -1 and set 'errno'. Like access, except that it uses the effective user and group id's instead of the real ones, and it does not always check for read-only file system, text busy, etc. */ @@ -79,13 +76,15 @@ int euidaccess (const char *file, int mode) { -#if defined EFF_ONLY_OK +#if HAVE_FACCESSAT /* glibc, AIX 7, Solaris 11, Cygwin 1.7 */ + return faccessat (AT_FDCWD, file, mode, AT_EACCESS); +#elif defined EFF_ONLY_OK /* IRIX, OSF/1, Interix */ return access (file, mode | EFF_ONLY_OK); -#elif defined ACC_SELF +#elif defined ACC_SELF /* AIX */ return accessx (file, mode, ACC_SELF); -#elif HAVE_EACCESS +#elif HAVE_EACCESS /* FreeBSD */ return eaccess (file, mode); -#else +#else /* Mac OS X, NetBSD, OpenBSD, HP-UX, Solaris, Cygwin, mingw, BeOS */ uid_t uid = getuid (); gid_t gid = getgid (); @@ -110,18 +109,18 @@ euidaccess (const char *file, int mode) int saved_errno; if (uid != euid) - setreuid (euid, uid); + setreuid (euid, uid); if (gid != egid) - setregid (egid, gid); + setregid (egid, gid); result = access (file, mode); saved_errno = errno; /* Restore them. */ if (uid != euid) - setreuid (uid, euid); + setreuid (uid, euid); if (gid != egid) - setregid (gid, egid); + setregid (gid, egid); errno = saved_errno; return result; @@ -143,8 +142,9 @@ euidaccess (const char *file, int mode) /* The super-user can read and write any file, and execute any file that anyone can execute. */ - if (euid == 0 && ((mode & X_OK) == 0 - || (stats.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)))) + if (euid == ROOT_UID + && ((mode & X_OK) == 0 + || (stats.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)))) return 0; /* Convert the mode to traditional form, clearing any bogus bits. */ @@ -152,11 +152,11 @@ euidaccess (const char *file, int mode) mode &= 7; else mode = ((mode & R_OK ? 4 : 0) - + (mode & W_OK ? 2 : 0) - + (mode & X_OK ? 1 : 0)); + + (mode & W_OK ? 2 : 0) + + (mode & X_OK ? 1 : 0)); if (mode == 0) - return 0; /* The file exists. */ + return 0; /* The file exists. */ /* Convert the file's permission bits to traditional form. */ if (S_IRUSR == (4 << 6) && S_IWUSR == (2 << 6) && S_IXUSR == (1 << 6) @@ -165,14 +165,14 @@ euidaccess (const char *file, int mode) granted = stats.st_mode; else granted = ((stats.st_mode & S_IRUSR ? 4 << 6 : 0) - + (stats.st_mode & S_IWUSR ? 2 << 6 : 0) - + (stats.st_mode & S_IXUSR ? 1 << 6 : 0) - + (stats.st_mode & S_IRGRP ? 4 << 3 : 0) - + (stats.st_mode & S_IWGRP ? 2 << 3 : 0) - + (stats.st_mode & S_IXGRP ? 1 << 3 : 0) - + (stats.st_mode & S_IROTH ? 4 << 0 : 0) - + (stats.st_mode & S_IWOTH ? 2 << 0 : 0) - + (stats.st_mode & S_IXOTH ? 1 << 0 : 0)); + + (stats.st_mode & S_IWUSR ? 2 << 6 : 0) + + (stats.st_mode & S_IXUSR ? 1 << 6 : 0) + + (stats.st_mode & S_IRGRP ? 4 << 3 : 0) + + (stats.st_mode & S_IWGRP ? 2 << 3 : 0) + + (stats.st_mode & S_IXGRP ? 1 << 3 : 0) + + (stats.st_mode & S_IROTH ? 4 << 0 : 0) + + (stats.st_mode & S_IWOTH ? 2 << 0 : 0) + + (stats.st_mode & S_IXOTH ? 1 << 0 : 0)); if (euid == stats.st_uid) granted >>= 6; |