+/*
+ * 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"
-#define _LINUX_SOCKET_H
-#define _LINUX_FS_H
+/* these constants are the same as in <linux/capability.h> */
+enum {
+#include "caps0.h"
+};
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#ifdef HAVE_LINUX_CAPABILITY_H
-# include <linux/capability.h>
-#endif
+#include "xlat/cap_mask0.h"
-#ifdef SYS_capget
+/* these constants are CAP_TO_INDEX'ed constants from <linux/capability.h> */
+enum {
+#include "caps1.h"
+};
-#include "xlat/capabilities.h"
+#include "xlat/cap_mask1.h"
-#ifndef _LINUX_CAPABILITY_VERSION_1
-# define _LINUX_CAPABILITY_VERSION_1 0x19980330
-#endif
-#ifndef _LINUX_CAPABILITY_VERSION_2
-# define _LINUX_CAPABILITY_VERSION_2 0x20071026
-#endif
-#ifndef _LINUX_CAPABILITY_VERSION_3
-# define _LINUX_CAPABILITY_VERSION_3 0x20080522
-#endif
+/* these constants are the same as in <linux/capability.h> */
+enum {
+ _LINUX_CAPABILITY_VERSION_1 = 0x19980330,
+ _LINUX_CAPABILITY_VERSION_2 = 0x20071026,
+ _LINUX_CAPABILITY_VERSION_3 = 0x20080522
+};
#include "xlat/cap_version.h"
+struct user_cap_header_struct {
+ uint32_t version;
+ int pid;
+};
+
+struct user_cap_data_struct {
+ uint32_t effective;
+ uint32_t permitted;
+ uint32_t inheritable;
+};
+
+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;
+
+ if (!addr || !verbose(tcp))
+ return NULL;
+
+ if (umove(tcp, addr, &header) < 0)
+ return NULL;
+
+ return &header;
+}
+
static void
-print_cap_header(struct tcb *tcp, unsigned long addr)
+print_cap_header(struct tcb *const tcp, const kernel_ulong_t addr,
+ const struct user_cap_header_struct *const h)
{
- union { cap_user_header_t p; long *a; char *c; } arg;
- long a[sizeof(*arg.p) / sizeof(long) + 1];
- arg.a = a;
-
- if (!addr)
- tprints("NULL");
- else if (!verbose(tcp) ||
- umoven(tcp, addr, sizeof(*arg.p), arg.c) < 0)
- tprintf("%#lx", addr);
- else {
- tprints("{");
- printxval(cap_version, arg.p->version,
- "_LINUX_CAPABILITY_VERSION_???");
- tprintf(", %d}", arg.p->pid);
+ if (!addr || !h) {
+ printaddr(addr);
+ return;
}
+
+ tprints("{version=");
+ printxval(cap_version, h->version,
+ "_LINUX_CAPABILITY_VERSION_???");
+ tprintf(", pid=%d}", h->pid);
}
static void
-print_cap_data(struct tcb *tcp, unsigned long addr)
+print_cap_bits(const uint32_t lo, const uint32_t hi)
{
- union { cap_user_data_t p; long *a; char *c; } arg;
- long a[sizeof(*arg.p) / sizeof(long) + 1];
- arg.a = a;
-
- if (!addr)
- tprints("NULL");
- else if (!verbose(tcp) ||
- (exiting(tcp) && syserror(tcp)) ||
- umoven(tcp, addr, sizeof(*arg.p), arg.c) < 0)
- tprintf("%#lx", addr);
- else {
- tprints("{");
- printflags(capabilities, arg.p->effective, "CAP_???");
- tprints(", ");
- printflags(capabilities, arg.p->permitted, "CAP_???");
- tprints(", ");
- printflags(capabilities, arg.p->inheritable, "CAP_???");
- tprints("}");
+ if (lo || !hi)
+ printflags(cap_mask0, lo, "CAP_???");
+
+ if (hi) {
+ if (lo)
+ tprints("|");
+ printflags(cap_mask1, hi, "CAP_???");
}
}
-int
-sys_capget(struct tcb *tcp)
+static void
+print_cap_data(struct tcb *const tcp, const kernel_ulong_t addr,
+ const struct user_cap_header_struct *const h)
{
- if (entering(tcp)) {
- print_cap_header(tcp, tcp->u_arg[0]);
- tprints(", ");
- } else {
- print_cap_data(tcp, tcp->u_arg[1]);
+ struct user_cap_data_struct data[2];
+ unsigned int len;
+
+ if (!addr || !h) {
+ printaddr(addr);
+ return;
}
- return 0;
+
+ if (_LINUX_CAPABILITY_VERSION_2 == h->version ||
+ _LINUX_CAPABILITY_VERSION_3 == h->version)
+ len = 2;
+ else
+ len = 1;
+
+ if (umoven_or_printaddr(tcp, addr, len * sizeof(data[0]), data))
+ return;
+
+ tprints("{effective=");
+ print_cap_bits(data[0].effective, len > 1 ? data[1].effective : 0);
+ tprints(", permitted=");
+ print_cap_bits(data[0].permitted, len > 1 ? data[1].permitted : 0);
+ tprints(", inheritable=");
+ print_cap_bits(data[0].inheritable, len > 1 ? data[1].inheritable : 0);
+ tprints("}");
}
-int
-sys_capset(struct tcb *tcp)
+SYS_FUNC(capget)
{
+ const struct user_cap_header_struct *h;
+
if (entering(tcp)) {
- print_cap_header(tcp, tcp->u_arg[0]);
+ 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]);
+ } else {
+ h = syserror(tcp) ? NULL : get_cap_header(tcp, tcp->u_arg[0]);
+ print_cap_data(tcp, tcp->u_arg[1], h);
}
return 0;
}
-#else
-
-int sys_capget(struct tcb *tcp)
+SYS_FUNC(capset)
{
- return printargs(tcp);
-}
+ 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);
-int sys_capset(struct tcb *tcp)
-{
- return printargs(tcp);
+ return RVAL_DECODED;
}
-
-#endif
projects / strace / blobdiff