+/*
+ * Copyright (c) 2000 Wichert Akkerman <wakkerma@debian.org>
+ * Copyright (c) 2011 Denys Vlasenko <dvlasenk@redhat.com>
+ * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
+ * Copyright (c) 2014-2017 The strace developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
#include "defs.h"
/* these constants are the same as in <linux/capability.h> */
#include "xlat/cap_version.h"
-typedef struct user_cap_header_struct {
+struct user_cap_header_struct {
uint32_t version;
int pid;
-} *cap_user_header_t;
+};
-typedef struct user_cap_data_struct {
+struct user_cap_data_struct {
uint32_t effective;
uint32_t permitted;
uint32_t inheritable;
-} *cap_user_data_t;
+};
-static cap_user_header_t
-get_cap_header(struct tcb *tcp, unsigned long addr)
+static const struct user_cap_header_struct *
+get_cap_header(struct tcb *const tcp, const kernel_ulong_t addr)
{
static struct user_cap_header_struct header;
}
static void
-print_cap_header(struct tcb *tcp, unsigned long addr, cap_user_header_t h)
+print_cap_header(struct tcb *const tcp, const kernel_ulong_t addr,
+ const struct user_cap_header_struct *const h)
{
- if (!addr) {
- tprints("NULL");
- return;
- }
-
- if (!h) {
- tprintf("%#lx", addr);
+ if (!addr || !h) {
+ printaddr(addr);
return;
}
- tprints("{");
+ tprints("{version=");
printxval(cap_version, h->version,
"_LINUX_CAPABILITY_VERSION_???");
- tprintf(", %d}", h->pid);
+ tprintf(", pid=%d}", h->pid);
}
static void
}
static void
-print_cap_data(struct tcb *tcp, unsigned long addr, const cap_user_header_t h)
+print_cap_data(struct tcb *const tcp, const kernel_ulong_t addr,
+ const struct user_cap_header_struct *const h)
{
struct user_cap_data_struct data[2];
unsigned int len;
- if (!addr) {
- tprints("NULL");
- return;
- }
-
- if (!h || !verbose(tcp) ||
- (exiting(tcp) && syserror(tcp))) {
- tprintf("%#lx", addr);
+ if (!addr || !h) {
+ printaddr(addr);
return;
}
else
len = 1;
- if (umoven(tcp, addr, len * sizeof(data[0]), (char *) data) < 0) {
- tprintf("%#lx", addr);
+ if (umoven_or_printaddr(tcp, addr, len * sizeof(data[0]), data))
return;
- }
- tprints("{");
+ tprints("{effective=");
print_cap_bits(data[0].effective, len > 1 ? data[1].effective : 0);
- tprints(", ");
+ tprints(", permitted=");
print_cap_bits(data[0].permitted, len > 1 ? data[1].permitted : 0);
- tprints(", ");
+ tprints(", inheritable=");
print_cap_bits(data[0].inheritable, len > 1 ? data[1].inheritable : 0);
tprints("}");
}
-int
-sys_capget(struct tcb *tcp)
+SYS_FUNC(capget)
{
- cap_user_header_t h;
+ const struct user_cap_header_struct *h;
if (entering(tcp)) {
h = get_cap_header(tcp, tcp->u_arg[0]);
return 0;
}
-int
-sys_capset(struct tcb *tcp)
+SYS_FUNC(capset)
{
- if (entering(tcp)) {
- cap_user_header_t h = get_cap_header(tcp, tcp->u_arg[0]);
- print_cap_header(tcp, tcp->u_arg[0], h);
- tprints(", ");
- print_cap_data(tcp, tcp->u_arg[1], h);
- }
- return 0;
+ const struct user_cap_header_struct *const h =
+ get_cap_header(tcp, tcp->u_arg[0]);
+ print_cap_header(tcp, tcp->u_arg[0], h);
+ tprints(", ");
+ print_cap_data(tcp, tcp->u_arg[1], h);
+
+ return RVAL_DECODED;
}