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1998-07-16 10:23 Ulrich Drepper <drepper@cygnus.com> * argp/argp-fmtstream.c: Unify names of used global functions. * argp/argp-help.c: Likewise. * assert/assert-perr.c: Likewise * assert/assert.c: Likewise * dirent/scandir.c: Likewise * dirent/scandir64.c: Likewise * dirent/versionsort.c: Likewise * dirent/versionsort64.c: Likewise * gmon/bb_exit_func.c: Likewise. * gmon/gmon.c: Likewise. * grp/initgroups.c: Likewise. * iconv/gconv_conf.c: Likewise. * inet/getnameinfo.c: Likewise. * inet/getnetgrent_r.c: Likewise. * inet/inet_ntoa.c: Likewise. * inet/rcmd.c: Likewise. * inet/rexec.c: Likewise. * inet/ruserpass.c: Likewise. * io/fts.c: Likewise. * io/ftw.c: Likewise. * io/ftw64.c: Likewise. * io/getdirname.c: Likewise. * io/getwd.c: Likewise. * io/lockf.c: Likewise. * libio/iofdopen.c: Likewise. * libio/iopopen.c: Likewise. * login/utmp_daemon.c: Likewise. * malloc/mtrace.c: Likewise. * malloc/obstack.c * misc/daemon.c: Likewise. * misc/efgcvt_r.c: Likewise. * misc/err.c: Likewise. * misc/error.c: Likewise. * misc/fstab.c: Likewise. * misc/getpass.c: Likewise. * misc/getttyent.c: Likewise. * misc/mntent_r.c: Likewise. * misc/search.h: Likewise. * misc/syslog.c: Likewise. * nscd/nscd_getgr_r.c: Likewise. * nscd/nscd_getpw_r.c: Likewise. * posix/getpgrp.c: Likewise. * posix/wordexp.c: Likewise. * pwd/fgetpwent_r.c: Likewise. * pwd/getpw.c: Likewise. * resolv/herror.c: Likewise. * resolv/res_init.c: Likewise. * shadow/fgetspent_r.c: Likewise. * shadow/lckpwdf.c: Likewise. * signal/sigrelse.c: Likewise. * stdio-common/asprintf.c: Likewise. * stdio-common/dprintf.c: Likewise. * stdio-common/getw.c: Likewise. * stdio-common/putw.c: Likewise. * stdio-common/snprintf.c: Likewise. * stdio-common/sprintf.c: Likewise. * stdio-common/sscanf.c: Likewise. * stdlib/lrand48_r.c: Likewise. * stdlib/mrand48_r.c: Likewise. * string/argz-replace.c: Likewise. * string/envz.c: Likewise. * sunrpc/auth_des.c: Likewise. * sunrpc/auth_unix.c: Likewise. * sunrpc/bindrsvprt.c: Likewise. * sunrpc/clnt_gen.c: Likewise. * sunrpc/clnt_perr.c: Likewise. * sunrpc/clnt_simp.c: Likewise. * sunrpc/clnt_tcp.c: Likewise. * sunrpc/clnt_udp.c: Likewise. * sunrpc/get_myaddr.c: Likewise. * sunrpc/key_call.c: Likewise. * sunrpc/netname.c: Likewise. * sunrpc/openchild.c: Likewise. * sunrpc/pmap_rmt.c: Likewise. * sunrpc/rpc_dtable.c: Likewise. * sunrpc/rtime.c: Likewise. * sunrpc/svc_run.c: Likewise. * sunrpc/svc_simple.c: Likewise. * sunrpc/svc_tcp.c: Likewise. * sunrpc/svc_udp.c: Likewise. * sunrpc/svcauth_des.c: Likewise. * sunrpc/xdr_array.c: Likewise. * sunrpc/xdr_rec.c: Likewise. * sunrpc/xdr_ref.c: Likewise. * sunrpc/xdr_stdio.c: Likewise. * sysdeps/generic/abort.c: Likewise. * sysdeps/generic/dl-sysdep.c: Likewise. * sysdeps/generic/fstatfs64.c: Likewise. * sysdeps/generic/ftruncate64.c: Likewise. * sysdeps/generic/getrlimit64.c: Likewise. * sysdeps/generic/glob.c: Likewise. * sysdeps/generic/prof-freq.c: Likewise. * sysdeps/generic/putenv.c: Likewise. * sysdeps/generic/statfs64.c: Likewise. * sysdeps/generic/ttyname_r.c: Likewise. * sysdeps/generic/utmp_file.c: Likewise. * sysdeps/generic/vlimit.c: Likewise. * sysdeps/generic/vtimes.c: Likewise. * sysdeps/posix/cuserid.c: Likewise. * sysdeps/posix/euidaccess.c: Likewise. * sysdeps/posix/mkstemp.c: Likewise. * sysdeps/posix/mktemp.c: Likewise. * sysdeps/posix/pread.c: Likewise. * sysdeps/posix/pread64.c: Likewise. * sysdeps/posix/profil.c: Likewise. * sysdeps/posix/pwrite.c: Likewise. * sysdeps/posix/pwrite64.c: Likewise. * sysdeps/posix/sigblock.c: Likewise. * sysdeps/posix/sigpause.c: Likewise. * sysdeps/posix/ttyname.c: Likewise. * sysdeps/posix/ttyname_r.c: Likewise. * sysdeps/posix/waitid.c: Likewise. * sysdeps/unix/getlogin_r.c: Likewise. * sysdeps/unix/grantpt.c: Likewise. * sysdeps/unix/rewinddir.c: Likewise. * sysdeps/unix/sysv/linux/gethostid.c: Likewise. * sysdeps/unix/sysv/linux/getpt.c: Likewise. * sysdeps/unix/sysv/linux/if_index.c: Likewise. * sysdeps/unix/sysv/linux/ptsname.c: Likewise. * sysdeps/unix/sysv/linux/sendmsg.c: Likewise. * sysdeps/unix/sysv/linux/statvfs.c: Likewise. * sysdeps/unix/sysv/linux/ttyname.c: Likewise. * sysdeps/unix/sysv/linux/ttyname_r.c: Likewise. * sysdeps/unix/sysv/linux/ulimit.c: Likewise. * sysdeps/unix/sysv/linux/unlockpt.c: Likewise. * sysvipc/sys/shm.h: Likewise. * time/ctime_r.c: Likewise. * time/strptime.c: Likewise. * wcsmbs/mbrlen.c: Likewise. * wcsmbs/wcsdup.c: Likewise. * wcsmbs/wcsxfrm.c: Likewise. * wctype/wcfuncs.c: Likewise. * sysdeps/unix/sysv/linux/i386/socker.S: Change to honor NO_WEAK_ALIAS. * sysdeps/unix/sysv/linux/accept.S: Don't generate __ name. * sysdeps/unix/sysv/linux/bind.S: Likewise. * sysdeps/unix/sysv/linux/getsockname.S: Likewise. * sysdeps/unix/sysv/linux/listen.S: Likewise. * sysdeps/unix/sysv/linux/recvfrom.S: Likewise. * sysdeps/unix/sysv/linux/sendto.S: Likewise. * sysdeps/unix/sysv/linux/setsockopt.S: Likewise. * grp/fgetgrent_r.c: Use explicit locking of the stream. * elf/Makefile (rtld-routines): Add dl-environ. * sysdeps/generic/dl-environ.c: New file. * libio/Makefile [REENTRANT] (routines): Add iofputs_u. * libio/Versions: Add fputs_unlocked. * libio/iofputs_u.c: New file. * libio/stdio.h: Add prototype for fputs_unlocked. * sunrpc/rpc/auth.h: Use __PMT instead of __P in type definitions. * sunrpc/rpc/clnt.h: Likewise. * sunrpc/rpc/pmap_clnt.h: Likewise. * sunrpc/rpc/svc.h: Likewise. * sunrpc/rpc/xdr.h: Likewise. * sysdeps/i386/memchr.S: Correct for more strict gas. * sysdeps/i386/fpu/bits/mathinline.h: Likewise. * sysdeps/libm-i387/i686/s_fdim.S: Likewise. * sysdeps/libm-i387/i686/s_fdimf.S: Likewise. * sysdeps/libm-i387/i686/s_fdiml.S: Likewise. 1998-07-15 Andreas Jaeger <aj@arthur.rhein-neckar.de> * configure.in: Change message for binutils version from 2.8.1.0.17->2.8.1.0.23. 1998-07-15 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/sysv4/solaris2/sparc/sysdep.h: Define LOC. Patch by John Tobey <jtobey@banta-im.com>.
230 lines
5.0 KiB
C
230 lines
5.0 KiB
C
/* Check if effective user id can access file
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Copyright (C) 1990, 91, 95, 96, 97, 98 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Written by David MacKenzie and Torbjorn Granlund.
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Adapted for GNU C library by Roland McGrath. */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef S_IEXEC
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#ifndef S_IXUSR
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#define S_IXUSR S_IEXEC
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#endif
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#ifndef S_IXGRP
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#define S_IXGRP (S_IEXEC >> 3)
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#endif
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#ifndef S_IXOTH
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#define S_IXOTH (S_IEXEC >> 6)
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#endif
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#endif /* S_IEXEC */
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#if defined (HAVE_UNISTD_H) || defined (_LIBC)
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#include <unistd.h>
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#endif
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#ifdef _POSIX_VERSION
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#include <limits.h>
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#if !defined(NGROUPS_MAX) || NGROUPS_MAX < 1
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#undef NGROUPS_MAX
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#define NGROUPS_MAX sysconf (_SC_NGROUPS_MAX)
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#endif /* NGROUPS_MAX */
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#else /* not _POSIX_VERSION */
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uid_t getuid ();
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gid_t getgid ();
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uid_t geteuid ();
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gid_t getegid ();
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#include <sys/param.h>
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#if !defined(NGROUPS_MAX) && defined(NGROUPS)
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#define NGROUPS_MAX NGROUPS
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#endif /* not NGROUPS_MAX and NGROUPS */
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#endif /* not POSIX_VERSION */
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#include <errno.h>
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#ifndef errno
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extern int errno;
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#endif
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#ifndef __set_errno
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#define __set_errno(val) errno = (val)
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#endif
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#if defined(EACCES) && !defined(EACCESS)
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#define EACCESS EACCES
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#endif
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#ifndef F_OK
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#define F_OK 0
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#define X_OK 1
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#define W_OK 2
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#define R_OK 4
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#endif
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#if !defined (S_IROTH) && defined (R_OK)
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# define S_IROTH R_OK
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#endif
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#if !defined (S_IWOTH) && defined (W_OK)
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# define S_IWOTH W_OK
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#endif
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#if !defined (S_IXOTH) && defined (X_OK)
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# define S_IXOTH X_OK
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#endif
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#ifdef _LIBC
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#define group_member __group_member
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#define euidaccess __euidaccess
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#else
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/* The user's real user id. */
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static uid_t uid;
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/* The user's real group id. */
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static gid_t gid;
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#ifdef HAVE_GETGROUPS
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int group_member ();
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#else
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#define group_member(gid) 0
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#endif
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#endif
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/* The user's effective user id. */
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static uid_t euid;
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/* The user's effective group id. */
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static gid_t egid;
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/* Nonzero if UID, GID, EUID, and EGID have valid values. */
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static int have_ids = 0;
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/* Return 0 if the user has permission of type MODE on file PATH;
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otherwise, return -1 and set `errno' to EACCESS.
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Like access, except that it uses the effective user and group
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id's instead of the real ones, and it does not check for read-only
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filesystem, text busy, etc. */
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int
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euidaccess (path, mode)
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const char *path;
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int mode;
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{
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struct stat stats;
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int granted;
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#ifdef _LIBC
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if (! __libc_enable_secure)
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/* If we are not set-uid or set-gid, access does the same. */
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return __access (path, mode);
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#else
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if (have_ids == 0)
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{
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have_ids = 1;
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uid = getuid ();
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gid = getgid ();
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euid = geteuid ();
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egid = getegid ();
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}
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if (uid == euid && gid == egid)
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/* If we are not set-uid or set-gid, access does the same. */
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return access (path, mode);
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#endif
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if (stat (path, &stats))
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return -1;
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mode &= (X_OK | W_OK | R_OK); /* Clear any bogus bits. */
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#if R_OK != S_IROTH || W_OK != S_IWOTH || X_OK != S_IXOTH
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?error Oops, portability assumptions incorrect.
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#endif
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if (mode == F_OK)
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return 0; /* The file exists. */
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#ifdef _LIBC
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/* Now we need the IDs. */
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if (have_ids == 0)
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{
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have_ids = 1;
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euid = __geteuid ();
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egid = __getegid ();
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}
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#endif
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/* The super-user can read and write any file, and execute any file
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that anyone can execute. */
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if (euid == 0 && ((mode & X_OK) == 0
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|| (stats.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))))
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return 0;
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if (euid == stats.st_uid)
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granted = (unsigned) (stats.st_mode & (mode << 6)) >> 6;
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else if (egid == stats.st_gid || group_member (stats.st_gid))
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granted = (unsigned) (stats.st_mode & (mode << 3)) >> 3;
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else
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granted = (stats.st_mode & mode);
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if (granted == mode)
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return 0;
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__set_errno (EACCESS);
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return -1;
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}
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#undef euidaccess
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#ifdef weak_alias
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weak_alias (__euidaccess, euidaccess)
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#endif
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#ifdef TEST
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#include <stdio.h>
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#include <errno.h>
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#include "error.h"
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char *program_name;
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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char *file;
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int mode;
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int err;
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program_name = argv[0];
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if (argc < 3)
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abort ();
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file = argv[1];
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mode = atoi (argv[2]);
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err = euidaccess (file, mode);
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printf ("%d\n", err);
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if (err != 0)
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error (0, errno, "%s", file);
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exit (0);
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}
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#endif
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