204 lines
4.8 KiB
C
204 lines
4.8 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 2003-2016 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef STRACE_UID_SIZE
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# if STRACE_UID_SIZE != 16
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# error invalid STRACE_UID_SIZE
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# endif
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# define SIZEIFY(x) SIZEIFY_(x,STRACE_UID_SIZE)
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# define SIZEIFY_(x,size) SIZEIFY__(x,size)
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# define SIZEIFY__(x,size) x ## size
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# define printuid SIZEIFY(printuid)
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# define sys_chown SIZEIFY(sys_chown)
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# define sys_fchown SIZEIFY(sys_fchown)
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# define sys_getgroups SIZEIFY(sys_getgroups)
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# define sys_getresuid SIZEIFY(sys_getresuid)
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# define sys_getuid SIZEIFY(sys_getuid)
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# define sys_setfsuid SIZEIFY(sys_setfsuid)
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# define sys_setgroups SIZEIFY(sys_setgroups)
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# define sys_setresuid SIZEIFY(sys_setresuid)
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# define sys_setreuid SIZEIFY(sys_setreuid)
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# define sys_setuid SIZEIFY(sys_setuid)
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#endif /* STRACE_UID_SIZE */
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#include "defs.h"
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#ifdef STRACE_UID_SIZE
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# if !NEED_UID16_PARSERS
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# undef STRACE_UID_SIZE
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# endif
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#else
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# define STRACE_UID_SIZE 32
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#endif
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#ifdef STRACE_UID_SIZE
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# undef uid_t
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# define uid_t uid_t_(STRACE_UID_SIZE)
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# define uid_t_(size) uid_t__(size)
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# define uid_t__(size) uint ## size ## _t
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SYS_FUNC(getuid)
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{
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return RVAL_UDECIMAL | RVAL_DECODED;
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}
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SYS_FUNC(setfsuid)
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{
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printuid("", tcp->u_arg[0]);
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return RVAL_UDECIMAL | RVAL_DECODED;
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}
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SYS_FUNC(setuid)
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{
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printuid("", tcp->u_arg[0]);
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return RVAL_DECODED;
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}
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static void
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get_print_uid(struct tcb *const tcp, const char *const prefix,
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const kernel_ulong_t addr)
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{
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uid_t uid;
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tprints(prefix);
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if (!umove_or_printaddr(tcp, addr, &uid)) {
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printuid("[", uid);
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tprints("]");
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}
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}
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SYS_FUNC(getresuid)
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{
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if (entering(tcp))
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return 0;
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get_print_uid(tcp, "", tcp->u_arg[0]);
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get_print_uid(tcp, ", ", tcp->u_arg[1]);
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get_print_uid(tcp, ", ", tcp->u_arg[2]);
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return 0;
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}
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SYS_FUNC(setreuid)
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{
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printuid("", tcp->u_arg[0]);
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printuid(", ", tcp->u_arg[1]);
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return RVAL_DECODED;
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}
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SYS_FUNC(setresuid)
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{
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printuid("", tcp->u_arg[0]);
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printuid(", ", tcp->u_arg[1]);
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printuid(", ", tcp->u_arg[2]);
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return RVAL_DECODED;
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}
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SYS_FUNC(chown)
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{
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printpath(tcp, tcp->u_arg[0]);
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printuid(", ", tcp->u_arg[1]);
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printuid(", ", tcp->u_arg[2]);
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return RVAL_DECODED;
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}
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SYS_FUNC(fchown)
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{
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printfd(tcp, tcp->u_arg[0]);
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printuid(", ", tcp->u_arg[1]);
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printuid(", ", tcp->u_arg[2]);
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return RVAL_DECODED;
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}
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void
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printuid(const char *text, const unsigned int uid)
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{
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if ((uid_t) -1U == (uid_t) uid)
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tprintf("%s-1", text);
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else
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tprintf("%s%u", text, (uid_t) uid);
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}
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static bool
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print_gid(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
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{
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printuid("", (* (uid_t *) elem_buf));
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return true;
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}
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static void
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print_groups(struct tcb *const tcp, const unsigned int len,
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const kernel_ulong_t addr)
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{
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static unsigned long ngroups_max;
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if (!ngroups_max)
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ngroups_max = sysconf(_SC_NGROUPS_MAX);
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if (len > ngroups_max) {
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printaddr(addr);
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return;
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}
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uid_t gid;
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print_array(tcp, addr, len, &gid, sizeof(gid),
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umoven_or_printaddr, print_gid, 0);
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}
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SYS_FUNC(setgroups)
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{
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const int len = tcp->u_arg[0];
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tprintf("%d, ", len);
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print_groups(tcp, len, tcp->u_arg[1]);
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return RVAL_DECODED;
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}
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SYS_FUNC(getgroups)
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{
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if (entering(tcp))
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tprintf("%d, ", (int) tcp->u_arg[0]);
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else
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print_groups(tcp, tcp->u_rval, tcp->u_arg[1]);
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return 0;
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}
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#endif /* STRACE_UID_SIZE */
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