system.c

/*
 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
 * 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

#define MS_RDONLY	 1	/* Mount read-only */
#define MS_NOSUID	 2	/* Ignore suid and sgid bits */
#define MS_NODEV	 4	/* Disallow access to device special files */
#define MS_NOEXEC	 8	/* Disallow program execution */
#define MS_SYNCHRONOUS	16	/* Writes are synced at once */
#define MS_REMOUNT	32	/* Alter flags of a mounted FS */
#define MS_MANDLOCK	64	/* Allow mandatory locks on an FS */
#define MS_DIRSYNC	128	/* Directory modifications are synchronous */
#define MS_NOATIME	1024	/* Do not update access times. */
#define MS_NODIRATIME	2048	/* Do not update directory access times */
#define MS_BIND		4096
#define MS_MOVE		8192
#define MS_REC		16384
#define MS_SILENT	32768
#define MS_POSIXACL	(1<<16)	/* VFS does not apply the umask */
#define MS_UNBINDABLE	(1<<17)	/* change to unbindable */
#define MS_PRIVATE	(1<<18)	/* change to private */
#define MS_SLAVE	(1<<19)	/* change to slave */
#define MS_SHARED	(1<<20)	/* change to shared */
#define MS_RELATIME	(1<<21)
#define MS_KERNMOUNT	(1<<22)
#define MS_I_VERSION	(1<<23)
#define MS_STRICTATIME	(1<<24)
#define MS_NOSEC	(1<<28)
#define MS_BORN		(1<<29)
#define MS_ACTIVE	(1<<30)
#define MS_NOUSER	(1<<31)
#define MS_MGC_VAL	0xc0ed0000	/* Magic flag number */
#define MS_MGC_MSK	0xffff0000	/* Magic flag mask */

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#ifdef HAVE_LINUX_CAPABILITY_H
# include <linux/capability.h>
#endif
#ifdef HAVE_ASM_CACHECTL_H
# include <asm/cachectl.h>
#endif
#ifdef HAVE_LINUX_USTNAME_H
# include <linux/utsname.h>
#endif
#ifdef HAVE_ASM_SYSMIPS_H
# include <asm/sysmips.h>
#endif
#include <linux/sysctl.h>

static const struct xlat mount_flags[] = {
	{ MS_MGC_VAL,	"MS_MGC_VAL"	},
	{ MS_RDONLY,	"MS_RDONLY"	},
	{ MS_NOSUID,	"MS_NOSUID"	},
	{ MS_NODEV,	"MS_NODEV"	},
	{ MS_NOEXEC,	"MS_NOEXEC"	},
	{ MS_SYNCHRONOUS,"MS_SYNCHRONOUS"},
	{ MS_REMOUNT,	"MS_REMOUNT"	},
	{ MS_RELATIME,	"MS_RELATIME"	},
	{ MS_KERNMOUNT,	"MS_KERNMOUNT"	},
	{ MS_I_VERSION,	"MS_I_VERSION"	},
	{ MS_STRICTATIME,"MS_STRICTATIME"},
	{ MS_NOSEC,	"MS_NOSEC"	},
	{ MS_BORN,	"MS_BORN"	},
	{ MS_MANDLOCK,	"MS_MANDLOCK"	},
	{ MS_NOATIME,	"MS_NOATIME"	},
	{ MS_NODIRATIME,"MS_NODIRATIME"	},
	{ MS_BIND,	"MS_BIND"	},
	{ MS_MOVE,	"MS_MOVE"	},
	{ MS_REC,	"MS_REC"	},
	{ MS_SILENT,	"MS_SILENT"	},
	{ MS_POSIXACL,	"MS_POSIXACL"	},
	{ MS_UNBINDABLE,"MS_UNBINDABLE"	},
	{ MS_PRIVATE,	"MS_PRIVATE"	},
	{ MS_SLAVE,	"MS_SLAVE"	},
	{ MS_SHARED,	"MS_SHARED"	},
	{ MS_ACTIVE,	"MS_ACTIVE"	},
	{ MS_NOUSER,	"MS_NOUSER"	},
	{ 0,		NULL		},
};

int
sys_mount(struct tcb *tcp)
{
	if (entering(tcp)) {
		int ignore_type = 0, ignore_data = 0;
		unsigned long flags = tcp->u_arg[3];

		/* Discard magic */
		if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
			flags &= ~MS_MGC_MSK;

		if (flags & MS_REMOUNT)
			ignore_type = 1;
		else if (flags & (MS_BIND | MS_MOVE))
			ignore_type = ignore_data = 1;

		printpath(tcp, tcp->u_arg[0]);
		tprints(", ");

		printpath(tcp, tcp->u_arg[1]);
		tprints(", ");

		if (ignore_type && tcp->u_arg[2])
			tprintf("%#lx", tcp->u_arg[2]);
		else
			printstr(tcp, tcp->u_arg[2], -1);
		tprints(", ");

		printflags(mount_flags, tcp->u_arg[3], "MS_???");
		tprints(", ");

		if (ignore_data && tcp->u_arg[4])
			tprintf("%#lx", tcp->u_arg[4]);
		else
			printstr(tcp, tcp->u_arg[4], -1);
	}
	return 0;
}

#define MNT_FORCE	0x00000001	/* Attempt to forcibily umount */
#define MNT_DETACH	0x00000002	/* Just detach from the tree */
#define MNT_EXPIRE	0x00000004	/* Mark for expiry */

static const struct xlat umount_flags[] = {
	{ MNT_FORCE,	"MNT_FORCE"	},
	{ MNT_DETACH,	"MNT_DETACH"	},
	{ MNT_EXPIRE,	"MNT_EXPIRE"	},
	{ 0,		NULL		},
};

int
sys_umount2(struct tcb *tcp)
{
	if (entering(tcp)) {
		printstr(tcp, tcp->u_arg[0], -1);
		tprints(", ");
		printflags(umount_flags, tcp->u_arg[1], "MNT_???");
	}
	return 0;
}

/* These are not macros, but enums.  We just copy the values by hand
   from Linux 2.6.9 here.  */
static const struct xlat personality_options[] = {
	{ 0,		"PER_LINUX"	},
	{ 0x00800000,	"PER_LINUX_32BIT"},
	{ 0x04100001,	"PER_SVR4"	},
	{ 0x05000002,	"PER_SVR3"	},
	{ 0x07000003,	"PER_SCOSVR3"	},
	{ 0x06000003,	"PER_OSR5"	},
	{ 0x05000004,	"PER_WYSEV386"	},
	{ 0x04000005,	"PER_ISCR4"	},
	{ 0x00000006,	"PER_BSD"	},
	{ 0x04000006,	"PER_SUNOS"	},
	{ 0x05000007,	"PER_XENIX"	},
	{ 0x00000008,	"PER_LINUX32"	},
	{ 0x08000008,	"PER_LINUX32_3GB"},
	{ 0x04000009,	"PER_IRIX32"	},
	{ 0x0400000a,	"PER_IRIXN32"	},
	{ 0x0400000b,	"PER_IRIX64"	},
	{ 0x0000000c,	"PER_RISCOS"	},
	{ 0x0400000d,	"PER_SOLARIS"	},
	{ 0x0410000e,	"PER_UW7"	},
	{ 0x0000000f,	"PER_OSF4"	},
	{ 0x00000010,	"PER_HPUX"	},
	{ 0,		NULL		},
};

int
sys_personality(struct tcb *tcp)
{
	if (entering(tcp))
		printxval(personality_options, tcp->u_arg[0], "PER_???");
	return 0;
}

enum {
	SYSLOG_ACTION_CLOSE = 0,
	SYSLOG_ACTION_OPEN,
	SYSLOG_ACTION_READ,
	SYSLOG_ACTION_READ_ALL,
	SYSLOG_ACTION_READ_CLEAR,
	SYSLOG_ACTION_CLEAR,
	SYSLOG_ACTION_CONSOLE_OFF,
	SYSLOG_ACTION_CONSOLE_ON,
	SYSLOG_ACTION_CONSOLE_LEVEL,
	SYSLOG_ACTION_SIZE_UNREAD,
	SYSLOG_ACTION_SIZE_BUFFER
};

static const struct xlat syslog_action_type[] = {
	{ SYSLOG_ACTION_CLOSE,		"SYSLOG_ACTION_CLOSE"		},
	{ SYSLOG_ACTION_OPEN,		"SYSLOG_ACTION_OPEN"		},
	{ SYSLOG_ACTION_READ,		"SYSLOG_ACTION_READ"		},
	{ SYSLOG_ACTION_READ_ALL,	"SYSLOG_ACTION_READ_ALL"	},
	{ SYSLOG_ACTION_READ_CLEAR,	"SYSLOG_ACTION_READ_CLEAR"	},
	{ SYSLOG_ACTION_CLEAR,		"SYSLOG_ACTION_CLEAR"		},
	{ SYSLOG_ACTION_CONSOLE_OFF,	"SYSLOG_ACTION_CONSOLE_OFF"	},
	{ SYSLOG_ACTION_CONSOLE_ON,	"SYSLOG_ACTION_CONSOLE_ON"	},
	{ SYSLOG_ACTION_CONSOLE_LEVEL,	"SYSLOG_ACTION_CONSOLE_LEVEL"	},
	{ SYSLOG_ACTION_SIZE_UNREAD,	"SYSLOG_ACTION_SIZE_UNREAD"	},
	{ SYSLOG_ACTION_SIZE_BUFFER,	"SYSLOG_ACTION_SIZE_BUFFER"	},
	{ 0,				NULL				}
};

int
sys_syslog(struct tcb *tcp)
{
	int type = tcp->u_arg[0];

	if (entering(tcp)) {
		/* type */
		printxval(syslog_action_type, type, "SYSLOG_ACTION_???");
		tprints(", ");
	}

	switch (type) {
		case SYSLOG_ACTION_READ:
		case SYSLOG_ACTION_READ_ALL:
		case SYSLOG_ACTION_READ_CLEAR:
			if (entering(tcp))
				return 0;
			break;
		default:
			if (entering(tcp)) {
				tprintf("%#lx, %lu",
					tcp->u_arg[1], tcp->u_arg[2]);
			}
			return 0;
	}

	/* bufp */
	if (syserror(tcp))
		tprintf("%#lx", tcp->u_arg[1]);
	else
		printstr(tcp, tcp->u_arg[1], tcp->u_rval);
	/* len */
	tprintf(", %d", (int) tcp->u_arg[2]);

	return 0;
}

#include <linux/reboot.h>
static const struct xlat bootflags1[] = {
	{ LINUX_REBOOT_MAGIC1,	"LINUX_REBOOT_MAGIC1"	},
	{ 0,			NULL			},
};

static const struct xlat bootflags2[] = {
	{ LINUX_REBOOT_MAGIC2,	"LINUX_REBOOT_MAGIC2"	},
	{ LINUX_REBOOT_MAGIC2A,	"LINUX_REBOOT_MAGIC2A"	},
	{ LINUX_REBOOT_MAGIC2B,	"LINUX_REBOOT_MAGIC2B"	},
	{ 0,			NULL			},
};

static const struct xlat bootflags3[] = {
	{ LINUX_REBOOT_CMD_CAD_OFF,	"LINUX_REBOOT_CMD_CAD_OFF"	},
	{ LINUX_REBOOT_CMD_RESTART,	"LINUX_REBOOT_CMD_RESTART"	},
	{ LINUX_REBOOT_CMD_HALT,	"LINUX_REBOOT_CMD_HALT"		},
	{ LINUX_REBOOT_CMD_CAD_ON,	"LINUX_REBOOT_CMD_CAD_ON"	},
	{ LINUX_REBOOT_CMD_POWER_OFF,	"LINUX_REBOOT_CMD_POWER_OFF"	},
	{ LINUX_REBOOT_CMD_RESTART2,	"LINUX_REBOOT_CMD_RESTART2"	},
	{ 0,				NULL				},
};

int
sys_reboot(struct tcb *tcp)
{
	if (entering(tcp)) {
		printflags(bootflags1, tcp->u_arg[0], "LINUX_REBOOT_MAGIC_???");
		tprints(", ");
		printflags(bootflags2, tcp->u_arg[1], "LINUX_REBOOT_MAGIC_???");
		tprints(", ");
		printflags(bootflags3, tcp->u_arg[2], "LINUX_REBOOT_CMD_???");
		if (tcp->u_arg[2] == LINUX_REBOOT_CMD_RESTART2) {
			tprints(", ");
			printstr(tcp, tcp->u_arg[3], -1);
		}
	}
	return 0;
}

#ifdef M68K
static const struct xlat cacheflush_scope[] = {
#ifdef FLUSH_SCOPE_LINE
	{ FLUSH_SCOPE_LINE,	"FLUSH_SCOPE_LINE" },
#endif
#ifdef FLUSH_SCOPE_PAGE
	{ FLUSH_SCOPE_PAGE,	"FLUSH_SCOPE_PAGE" },
#endif
#ifdef FLUSH_SCOPE_ALL
	{ FLUSH_SCOPE_ALL,	"FLUSH_SCOPE_ALL" },
#endif
	{ 0,			NULL },
};

static const struct xlat cacheflush_flags[] = {
#ifdef FLUSH_CACHE_BOTH
	{ FLUSH_CACHE_BOTH,	"FLUSH_CACHE_BOTH" },
#endif
#ifdef FLUSH_CACHE_DATA
	{ FLUSH_CACHE_DATA,	"FLUSH_CACHE_DATA" },
#endif
#ifdef FLUSH_CACHE_INSN
	{ FLUSH_CACHE_INSN,	"FLUSH_CACHE_INSN" },
#endif
	{ 0,			NULL },
};

int
sys_cacheflush(struct tcb *tcp)
{
	if (entering(tcp)) {
		/* addr */
		tprintf("%#lx, ", tcp->u_arg[0]);
		/* scope */
		printxval(cacheflush_scope, tcp->u_arg[1], "FLUSH_SCOPE_???");
		tprints(", ");
		/* flags */
		printflags(cacheflush_flags, tcp->u_arg[2], "FLUSH_CACHE_???");
		/* len */
		tprintf(", %lu", tcp->u_arg[3]);
	}
	return 0;
}
#endif /* M68K */

#ifdef BFIN

#include <bfin_sram.h>

static const struct xlat sram_alloc_flags[] = {
	{ L1_INST_SRAM,		"L1_INST_SRAM" },
	{ L1_DATA_A_SRAM,	"L1_DATA_A_SRAM" },
	{ L1_DATA_B_SRAM,	"L1_DATA_B_SRAM" },
	{ L1_DATA_SRAM,		"L1_DATA_SRAM" },
	{ L2_SRAM,		"L2_SRAM" },
	{ 0,			NULL },
};

int
sys_sram_alloc(struct tcb *tcp)
{
	if (entering(tcp)) {
		/* size */
		tprintf("%lu, ", tcp->u_arg[0]);
		/* flags */
		printxval(sram_alloc_flags, tcp->u_arg[1], "???_SRAM");
	}
	return 1;
}

#include <asm/cachectl.h>

static const struct xlat cacheflush_flags[] = {
	{ ICACHE,	"ICACHE" },
	{ DCACHE,	"DCACHE" },
	{ BCACHE,	"BCACHE" },
	{ 0,		NULL },
};

int
sys_cacheflush(struct tcb *tcp)
{
	if (entering(tcp)) {
		/* start addr */
		tprintf("%#lx, ", tcp->u_arg[0]);
		/* length */
		tprintf("%ld, ", tcp->u_arg[1]);
		/* flags */
		printxval(cacheflush_flags, tcp->u_arg[1], "?CACHE");
	}
	return 0;
}

#endif

#ifdef SH
static const struct xlat cacheflush_flags[] = {
#ifdef CACHEFLUSH_D_INVAL
	{ CACHEFLUSH_D_INVAL,	"CACHEFLUSH_D_INVAL" },
#endif
#ifdef CACHEFLUSH_D_WB
	{ CACHEFLUSH_D_WB,	"CACHEFLUSH_D_WB" },
#endif
#ifdef CACHEFLUSH_D_PURGE
	{ CACHEFLUSH_D_PURGE,	"CACHEFLUSH_D_PURGE" },
#endif
#ifdef CACHEFLUSH_I
	{ CACHEFLUSH_I,		"CACHEFLUSH_I" },
#endif
	{ 0,			NULL },
};

int
sys_cacheflush(struct tcb *tcp)
{
	if (entering(tcp)) {
		/* addr */
		tprintf("%#lx, ", tcp->u_arg[0]);
		/* len */
		tprintf("%lu, ", tcp->u_arg[1]);
		/* flags */
		printflags(cacheflush_flags, tcp->u_arg[2], "CACHEFLUSH_???");
	}
	return 0;
}
#endif /* SH */

#ifdef SYS_capget

static const struct xlat capabilities[] = {
	{ 1<<CAP_CHOWN,		"CAP_CHOWN"	},
	{ 1<<CAP_DAC_OVERRIDE,	"CAP_DAC_OVERRIDE"},
	{ 1<<CAP_DAC_READ_SEARCH,"CAP_DAC_READ_SEARCH"},
	{ 1<<CAP_FOWNER,	"CAP_FOWNER"	},
	{ 1<<CAP_FSETID,	"CAP_FSETID"	},
	{ 1<<CAP_KILL,		"CAP_KILL"	},
	{ 1<<CAP_SETGID,	"CAP_SETGID"	},
	{ 1<<CAP_SETUID,	"CAP_SETUID"	},
	{ 1<<CAP_SETPCAP,	"CAP_SETPCAP"	},
	{ 1<<CAP_LINUX_IMMUTABLE,"CAP_LINUX_IMMUTABLE"},
	{ 1<<CAP_NET_BIND_SERVICE,"CAP_NET_BIND_SERVICE"},
	{ 1<<CAP_NET_BROADCAST,	"CAP_NET_BROADCAST"},
	{ 1<<CAP_NET_ADMIN,	"CAP_NET_ADMIN"	},
	{ 1<<CAP_NET_RAW,	"CAP_NET_RAW"	},
	{ 1<<CAP_IPC_LOCK,	"CAP_IPC_LOCK"	},
	{ 1<<CAP_IPC_OWNER,	"CAP_IPC_OWNER"	},
	{ 1<<CAP_SYS_MODULE,	"CAP_SYS_MODULE"},
	{ 1<<CAP_SYS_RAWIO,	"CAP_SYS_RAWIO"	},
	{ 1<<CAP_SYS_CHROOT,	"CAP_SYS_CHROOT"},
	{ 1<<CAP_SYS_PTRACE,	"CAP_SYS_PTRACE"},
	{ 1<<CAP_SYS_PACCT,	"CAP_SYS_PACCT"	},
	{ 1<<CAP_SYS_ADMIN,	"CAP_SYS_ADMIN"	},
	{ 1<<CAP_SYS_BOOT,	"CAP_SYS_BOOT"	},
	{ 1<<CAP_SYS_NICE,	"CAP_SYS_NICE"	},
	{ 1<<CAP_SYS_RESOURCE,	"CAP_SYS_RESOURCE"},
	{ 1<<CAP_SYS_TIME,	"CAP_SYS_TIME"	},
	{ 1<<CAP_SYS_TTY_CONFIG,"CAP_SYS_TTY_CONFIG"},
#ifdef CAP_MKNOD
	{ 1<<CAP_MKNOD,		"CAP_MKNOD"	},
#endif
#ifdef CAP_LEASE
	{ 1<<CAP_LEASE,		"CAP_LEASE"	},
#endif
#ifdef CAP_AUDIT_WRITE
	{ 1<<CAP_AUDIT_WRITE,	"CAP_AUDIT_WRITE"},
#endif
#ifdef CAP_AUDIT_CONTROL
	{ 1<<CAP_AUDIT_CONTROL,	"CAP_AUDIT_CONTROL"},
#endif
#ifdef CAP_SETFCAP
	{ 1<<CAP_SETFCAP,	"CAP_SETFCAP"	},
#endif
	{ 0,		NULL		},
};

#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

static const struct xlat cap_version[] = {
	{ _LINUX_CAPABILITY_VERSION_1,	"_LINUX_CAPABILITY_VERSION_1"	},
	{ _LINUX_CAPABILITY_VERSION_2,	"_LINUX_CAPABILITY_VERSION_3"	},
	{ _LINUX_CAPABILITY_VERSION_3,	"_LINUX_CAPABILITY_VERSION_3"	},
	{ 0,				NULL				}
};

static void
print_cap_header(struct tcb *tcp, unsigned long addr)
{
	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);
	}
}

static void
print_cap_data(struct tcb *tcp, unsigned long addr)
{
	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("}");
	}
}

int
sys_capget(struct tcb *tcp)
{
	if (entering(tcp)) {
		print_cap_header(tcp, tcp->u_arg[0]);
		tprints(", ");
	} else {
		print_cap_data(tcp, tcp->u_arg[1]);
	}
	return 0;
}

int
sys_capset(struct tcb *tcp)
{
	if (entering(tcp)) {
		print_cap_header(tcp, tcp->u_arg[0]);
		tprints(", ");
		print_cap_data(tcp, tcp->u_arg[1]);
	}
	return 0;
}

#else

int sys_capget(struct tcb *tcp)
{
	return printargs(tcp);
}

int sys_capset(struct tcb *tcp)
{
	return printargs(tcp);
}

#endif

/* Linux 2.6.18+ headers removed CTL_PROC enum.  */
# define CTL_PROC 4
# define CTL_CPU 10		/* older headers lack */
static const struct xlat sysctl_root[] = {
	{ CTL_KERN, "CTL_KERN" },
	{ CTL_VM, "CTL_VM" },
	{ CTL_NET, "CTL_NET" },
	{ CTL_PROC, "CTL_PROC" },
	{ CTL_FS, "CTL_FS" },
	{ CTL_DEBUG, "CTL_DEBUG" },
	{ CTL_DEV, "CTL_DEV" },
	{ CTL_BUS, "CTL_BUS" },
	{ CTL_ABI, "CTL_ABI" },
	{ CTL_CPU, "CTL_CPU" },
	{ 0, NULL }
};

static const struct xlat sysctl_kern[] = {
	{ KERN_OSTYPE, "KERN_OSTYPE" },
	{ KERN_OSRELEASE, "KERN_OSRELEASE" },
	{ KERN_OSREV, "KERN_OSREV" },
	{ KERN_VERSION, "KERN_VERSION" },
	{ KERN_SECUREMASK, "KERN_SECUREMASK" },
	{ KERN_PROF, "KERN_PROF" },
	{ KERN_NODENAME, "KERN_NODENAME" },
	{ KERN_DOMAINNAME, "KERN_DOMAINNAME" },
#ifdef KERN_SECURELVL
	{ KERN_SECURELVL, "KERN_SECURELVL" },
#endif
	{ KERN_PANIC, "KERN_PANIC" },
#ifdef KERN_REALROOTDEV
	{ KERN_REALROOTDEV, "KERN_REALROOTDEV" },
#endif
#ifdef KERN_JAVA_INTERPRETER
	{ KERN_JAVA_INTERPRETER, "KERN_JAVA_INTERPRETER" },
#endif
#ifdef KERN_JAVA_APPLETVIEWER
	{ KERN_JAVA_APPLETVIEWER, "KERN_JAVA_APPLETVIEWER" },
#endif
	{ KERN_SPARC_REBOOT, "KERN_SPARC_REBOOT" },
	{ KERN_CTLALTDEL, "KERN_CTLALTDEL" },
	{ KERN_PRINTK, "KERN_PRINTK" },
	{ KERN_NAMETRANS, "KERN_NAMETRANS" },
	{ KERN_PPC_HTABRECLAIM, "KERN_PPC_HTABRECLAIM" },
	{ KERN_PPC_ZEROPAGED, "KERN_PPC_ZEROPAGED" },
	{ KERN_PPC_POWERSAVE_NAP, "KERN_PPC_POWERSAVE_NAP" },
	{ KERN_MODPROBE, "KERN_MODPROBE" },
	{ KERN_SG_BIG_BUFF, "KERN_SG_BIG_BUFF" },
	{ KERN_ACCT, "KERN_ACCT" },
	{ KERN_PPC_L2CR, "KERN_PPC_L2CR" },
	{ KERN_RTSIGNR, "KERN_RTSIGNR" },
	{ KERN_RTSIGMAX, "KERN_RTSIGMAX" },
	{ KERN_SHMMAX, "KERN_SHMMAX" },
	{ KERN_MSGMAX, "KERN_MSGMAX" },
	{ KERN_MSGMNB, "KERN_MSGMNB" },
	{ KERN_MSGPOOL, "KERN_MSGPOOL" },
	{ 0, NULL }
};

static const struct xlat sysctl_vm[] = {
#ifdef VM_SWAPCTL
	{ VM_SWAPCTL, "VM_SWAPCTL" },
#endif
#ifdef VM_UNUSED1
	{ VM_UNUSED1, "VM_UNUSED1" },
#endif
#ifdef VM_SWAPOUT
	{ VM_SWAPOUT, "VM_SWAPOUT" },
#endif
#ifdef VM_UNUSED2
	{ VM_UNUSED2, "VM_UNUSED2" },
#endif
#ifdef VM_FREEPG
	{ VM_FREEPG, "VM_FREEPG" },
#endif
#ifdef VM_UNUSED3
	{ VM_UNUSED3, "VM_UNUSED3" },
#endif
#ifdef VM_BDFLUSH
	{ VM_BDFLUSH, "VM_BDFLUSH" },
#endif
#ifdef VM_UNUSED4
	{ VM_UNUSED4, "VM_UNUSED4" },
#endif
	{ VM_OVERCOMMIT_MEMORY, "VM_OVERCOMMIT_MEMORY" },
#ifdef VM_BUFFERMEM
	{ VM_BUFFERMEM, "VM_BUFFERMEM" },
#endif
#ifdef VM_UNUSED5
	{ VM_UNUSED5, "VM_UNUSED5" },
#endif
#ifdef VM_PAGECACHE
	{ VM_PAGECACHE, "VM_PAGECACHE" },
#endif
#ifdef VM_UNUSED7
	{ VM_UNUSED7, "VM_UNUSED7" },
#endif
#ifdef VM_PAGERDAEMON
	{ VM_PAGERDAEMON, "VM_PAGERDAEMON" },
#endif
#ifdef VM_UNUSED8
	{ VM_UNUSED8, "VM_UNUSED8" },
#endif
#ifdef VM_PGT_CACHE
	{ VM_PGT_CACHE, "VM_PGT_CACHE" },
#endif
#ifdef VM_UNUSED9
	{ VM_UNUSED9, "VM_UNUSED9" },
#endif
	{ VM_PAGE_CLUSTER, "VM_PAGE_CLUSTER" },
	{ 0, NULL },
};

static const struct xlat sysctl_net[] = {
	{ NET_CORE, "NET_CORE" },
	{ NET_ETHER, "NET_ETHER" },
	{ NET_802, "NET_802" },
	{ NET_UNIX, "NET_UNIX" },
	{ NET_IPV4, "NET_IPV4" },
	{ NET_IPX, "NET_IPX" },
	{ NET_ATALK, "NET_ATALK" },
	{ NET_NETROM, "NET_NETROM" },
	{ NET_AX25, "NET_AX25" },
	{ NET_BRIDGE, "NET_BRIDGE" },
	{ NET_ROSE, "NET_ROSE" },
	{ NET_IPV6, "NET_IPV6" },
	{ NET_X25, "NET_X25" },
	{ NET_TR, "NET_TR" },
	{ NET_DECNET, "NET_DECNET" },
	{ 0, NULL }
};

static const struct xlat sysctl_net_core[] = {
	{ NET_CORE_WMEM_MAX, "NET_CORE_WMEM_MAX" },
	{ NET_CORE_RMEM_MAX, "NET_CORE_RMEM_MAX" },
	{ NET_CORE_WMEM_DEFAULT, "NET_CORE_WMEM_DEFAULT" },
	{ NET_CORE_RMEM_DEFAULT, "NET_CORE_RMEM_DEFAULT" },
	{ NET_CORE_MAX_BACKLOG, "NET_CORE_MAX_BACKLOG" },
	{ NET_CORE_FASTROUTE, "NET_CORE_FASTROUTE" },
	{ NET_CORE_MSG_COST, "NET_CORE_MSG_COST" },
	{ NET_CORE_MSG_BURST, "NET_CORE_MSG_BURST" },
	{ NET_CORE_OPTMEM_MAX, "NET_CORE_OPTMEM_MAX" },
	{ 0, NULL }
};

static const struct xlat sysctl_net_unix[] = {
	{ NET_UNIX_DESTROY_DELAY, "NET_UNIX_DESTROY_DELAY" },
	{ NET_UNIX_DELETE_DELAY, "NET_UNIX_DELETE_DELAY" },
	{ 0, NULL }
};

static const struct xlat sysctl_net_ipv4[] = {
	{ NET_IPV4_FORWARD, "NET_IPV4_FORWARD" },
	{ NET_IPV4_DYNADDR, "NET_IPV4_DYNADDR" },
	{ NET_IPV4_CONF, "NET_IPV4_CONF" },
	{ NET_IPV4_NEIGH, "NET_IPV4_NEIGH" },
	{ NET_IPV4_ROUTE, "NET_IPV4_ROUTE" },
	{ NET_IPV4_FIB_HASH, "NET_IPV4_FIB_HASH" },
	{ NET_IPV4_TCP_TIMESTAMPS, "NET_IPV4_TCP_TIMESTAMPS" },
	{ NET_IPV4_TCP_WINDOW_SCALING, "NET_IPV4_TCP_WINDOW_SCALING" },
	{ NET_IPV4_TCP_SACK, "NET_IPV4_TCP_SACK" },
	{ NET_IPV4_TCP_RETRANS_COLLAPSE, "NET_IPV4_TCP_RETRANS_COLLAPSE" },
	{ NET_IPV4_DEFAULT_TTL, "NET_IPV4_DEFAULT_TTL" },
	{ NET_IPV4_AUTOCONFIG, "NET_IPV4_AUTOCONFIG" },
	{ NET_IPV4_NO_PMTU_DISC, "NET_IPV4_NO_PMTU_DISC" },
	{ NET_IPV4_TCP_SYN_RETRIES, "NET_IPV4_TCP_SYN_RETRIES" },
	{ NET_IPV4_IPFRAG_HIGH_THRESH, "NET_IPV4_IPFRAG_HIGH_THRESH" },
	{ NET_IPV4_IPFRAG_LOW_THRESH, "NET_IPV4_IPFRAG_LOW_THRESH" },
	{ NET_IPV4_IPFRAG_TIME, "NET_IPV4_IPFRAG_TIME" },
	{ NET_IPV4_TCP_MAX_KA_PROBES, "NET_IPV4_TCP_MAX_KA_PROBES" },
	{ NET_IPV4_TCP_KEEPALIVE_TIME, "NET_IPV4_TCP_KEEPALIVE_TIME" },
	{ NET_IPV4_TCP_KEEPALIVE_PROBES, "NET_IPV4_TCP_KEEPALIVE_PROBES" },
	{ NET_IPV4_TCP_RETRIES1, "NET_IPV4_TCP_RETRIES1" },
	{ NET_IPV4_TCP_RETRIES2, "NET_IPV4_TCP_RETRIES2" },
	{ NET_IPV4_TCP_FIN_TIMEOUT, "NET_IPV4_TCP_FIN_TIMEOUT" },
	{ NET_IPV4_IP_MASQ_DEBUG, "NET_IPV4_IP_MASQ_DEBUG" },
	{ NET_TCP_SYNCOOKIES, "NET_TCP_SYNCOOKIES" },
	{ NET_TCP_STDURG, "NET_TCP_STDURG" },
	{ NET_TCP_RFC1337, "NET_TCP_RFC1337" },
	{ NET_TCP_SYN_TAILDROP, "NET_TCP_SYN_TAILDROP" },
	{ NET_TCP_MAX_SYN_BACKLOG, "NET_TCP_MAX_SYN_BACKLOG" },
	{ NET_IPV4_LOCAL_PORT_RANGE, "NET_IPV4_LOCAL_PORT_RANGE" },
	{ NET_IPV4_ICMP_ECHO_IGNORE_ALL, "NET_IPV4_ICMP_ECHO_IGNORE_ALL" },
	{ NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS, "NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS" },
	{ NET_IPV4_ICMP_SOURCEQUENCH_RATE, "NET_IPV4_ICMP_SOURCEQUENCH_RATE" },
	{ NET_IPV4_ICMP_DESTUNREACH_RATE, "NET_IPV4_ICMP_DESTUNREACH_RATE" },
	{ NET_IPV4_ICMP_TIMEEXCEED_RATE, "NET_IPV4_ICMP_TIMEEXCEED_RATE" },
	{ NET_IPV4_ICMP_PARAMPROB_RATE, "NET_IPV4_ICMP_PARAMPROB_RATE" },
	{ NET_IPV4_ICMP_ECHOREPLY_RATE, "NET_IPV4_ICMP_ECHOREPLY_RATE" },
	{ NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES, "NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES" },
	{ NET_IPV4_IGMP_MAX_MEMBERSHIPS, "NET_IPV4_IGMP_MAX_MEMBERSHIPS" },
	{  0, NULL }
};

static const struct xlat sysctl_net_ipv4_route[] = {
	{ NET_IPV4_ROUTE_FLUSH, "NET_IPV4_ROUTE_FLUSH" },
	{ NET_IPV4_ROUTE_MIN_DELAY, "NET_IPV4_ROUTE_MIN_DELAY" },
	{ NET_IPV4_ROUTE_MAX_DELAY, "NET_IPV4_ROUTE_MAX_DELAY" },
	{ NET_IPV4_ROUTE_GC_THRESH, "NET_IPV4_ROUTE_GC_THRESH" },
	{ NET_IPV4_ROUTE_MAX_SIZE, "NET_IPV4_ROUTE_MAX_SIZE" },
	{ NET_IPV4_ROUTE_GC_MIN_INTERVAL, "NET_IPV4_ROUTE_GC_MIN_INTERVAL" },
	{ NET_IPV4_ROUTE_GC_TIMEOUT, "NET_IPV4_ROUTE_GC_TIMEOUT" },
	{ NET_IPV4_ROUTE_GC_INTERVAL, "NET_IPV4_ROUTE_GC_INTERVAL" },
	{ NET_IPV4_ROUTE_REDIRECT_LOAD, "NET_IPV4_ROUTE_REDIRECT_LOAD" },
	{ NET_IPV4_ROUTE_REDIRECT_NUMBER, "NET_IPV4_ROUTE_REDIRECT_NUMBER" },
	{ NET_IPV4_ROUTE_REDIRECT_SILENCE, "NET_IPV4_ROUTE_REDIRECT_SILENCE" },
	{ NET_IPV4_ROUTE_ERROR_COST, "NET_IPV4_ROUTE_ERROR_COST" },
	{ NET_IPV4_ROUTE_ERROR_BURST, "NET_IPV4_ROUTE_ERROR_BURST" },
	{ NET_IPV4_ROUTE_GC_ELASTICITY, "NET_IPV4_ROUTE_GC_ELASTICITY" },
	{ 0, NULL }
};

static const struct xlat sysctl_net_ipv4_conf[] = {
	{ NET_IPV4_CONF_FORWARDING, "NET_IPV4_CONF_FORWARDING" },
	{ NET_IPV4_CONF_MC_FORWARDING, "NET_IPV4_CONF_MC_FORWARDING" },
	{ NET_IPV4_CONF_PROXY_ARP, "NET_IPV4_CONF_PROXY_ARP" },
	{ NET_IPV4_CONF_ACCEPT_REDIRECTS, "NET_IPV4_CONF_ACCEPT_REDIRECTS" },
	{ NET_IPV4_CONF_SECURE_REDIRECTS, "NET_IPV4_CONF_SECURE_REDIRECTS" },
	{ NET_IPV4_CONF_SEND_REDIRECTS, "NET_IPV4_CONF_SEND_REDIRECTS" },
	{ NET_IPV4_CONF_SHARED_MEDIA, "NET_IPV4_CONF_SHARED_MEDIA" },
	{ NET_IPV4_CONF_RP_FILTER, "NET_IPV4_CONF_RP_FILTER" },
	{ NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE, "NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE" },
	{ NET_IPV4_CONF_BOOTP_RELAY, "NET_IPV4_CONF_BOOTP_RELAY" },
	{ NET_IPV4_CONF_LOG_MARTIANS, "NET_IPV4_CONF_LOG_MARTIANS" },
	{ 0, NULL }
};

static const struct xlat sysctl_net_ipv6[] = {
	{ NET_IPV6_CONF, "NET_IPV6_CONF" },
	{ NET_IPV6_NEIGH, "NET_IPV6_NEIGH" },
	{ NET_IPV6_ROUTE, "NET_IPV6_ROUTE" },
	{ 0, NULL }
};

static const struct xlat sysctl_net_ipv6_route[] = {
	{ NET_IPV6_ROUTE_FLUSH, "NET_IPV6_ROUTE_FLUSH" },
	{ NET_IPV6_ROUTE_GC_THRESH, "NET_IPV6_ROUTE_GC_THRESH" },
	{ NET_IPV6_ROUTE_MAX_SIZE, "NET_IPV6_ROUTE_MAX_SIZE" },
	{ NET_IPV6_ROUTE_GC_MIN_INTERVAL, "NET_IPV6_ROUTE_GC_MIN_INTERVAL" },
	{ NET_IPV6_ROUTE_GC_TIMEOUT, "NET_IPV6_ROUTE_GC_TIMEOUT" },
	{ NET_IPV6_ROUTE_GC_INTERVAL, "NET_IPV6_ROUTE_GC_INTERVAL" },
	{ NET_IPV6_ROUTE_GC_ELASTICITY, "NET_IPV6_ROUTE_GC_ELASTICITY" },
	{ 0, NULL }
};

int
sys_sysctl(struct tcb *tcp)
{
	struct __sysctl_args info;
	int *name;
	unsigned long size;

	if (umove(tcp, tcp->u_arg[0], &info) < 0)
		return printargs(tcp);

	size = sizeof(int) * (unsigned long) info.nlen;
	name = (size / sizeof(int) != info.nlen) ? NULL : malloc(size);
	if (name == NULL ||
	    umoven(tcp, (unsigned long) info.name, size, (char *) name) < 0) {
		free(name);
		if (entering(tcp))
			tprintf("{%p, %d, %p, %p, %p, %lu}",
				info.name, info.nlen, info.oldval,
				info.oldlenp, info.newval, (unsigned long)info.newlen);
		return 0;
	}

	if (entering(tcp)) {
		int cnt = 0, max_cnt;

		tprints("{{");

		if (info.nlen == 0)
			goto out;
		printxval(sysctl_root, name[0], "CTL_???");
		++cnt;

		if (info.nlen == 1)
			goto out;
		switch (name[0]) {
		case CTL_KERN:
			tprints(", ");
			printxval(sysctl_kern, name[1], "KERN_???");
			++cnt;
			break;
		case CTL_VM:
			tprints(", ");
			printxval(sysctl_vm, name[1], "VM_???");
			++cnt;
			break;
		case CTL_NET:
			tprints(", ");
			printxval(sysctl_net, name[1], "NET_???");
			++cnt;

			if (info.nlen == 2)
				goto out;
			switch (name[1]) {
			case NET_CORE:
				tprints(", ");
				printxval(sysctl_net_core, name[2],
					  "NET_CORE_???");
				break;
			case NET_UNIX:
				tprints(", ");
				printxval(sysctl_net_unix, name[2],
					  "NET_UNIX_???");
				break;
			case NET_IPV4:
				tprints(", ");
				printxval(sysctl_net_ipv4, name[2],
					  "NET_IPV4_???");

				if (info.nlen == 3)
					goto out;
				switch (name[2]) {
				case NET_IPV4_ROUTE:
					tprints(", ");
					printxval(sysctl_net_ipv4_route,
						  name[3],
						  "NET_IPV4_ROUTE_???");
					break;
				case NET_IPV4_CONF:
					tprints(", ");
					printxval(sysctl_net_ipv4_conf,
						  name[3],
						  "NET_IPV4_CONF_???");
					break;
				default:
					goto out;
				}
				break;
			case NET_IPV6:
				tprints(", ");
				printxval(sysctl_net_ipv6, name[2],
					  "NET_IPV6_???");

				if (info.nlen == 3)
					goto out;
				switch (name[2]) {
				case NET_IPV6_ROUTE:
					tprints(", ");
					printxval(sysctl_net_ipv6_route,
						  name[3],
						  "NET_IPV6_ROUTE_???");
					break;
				default:
					goto out;
				}
				break;
			default:
				goto out;
			}
			break;
		default:
			goto out;
		}
	out:
		max_cnt = info.nlen;
		if (abbrev(tcp) && max_cnt > max_strlen)
			max_cnt = max_strlen;
		while (cnt < max_cnt)
			tprintf(", %x", name[cnt++]);
		if (cnt < info.nlen)
			tprints(", ...");
		tprintf("}, %d, ", info.nlen);
	} else {
		size_t oldlen = 0;
		if (umove(tcp, (long)info.oldlenp, &oldlen) >= 0
		    && info.nlen >= 2
		    && ((name[0] == CTL_KERN
			 && (name[1] == KERN_OSRELEASE
			     || name[1] == KERN_OSTYPE
#ifdef KERN_JAVA_INTERPRETER
			     || name[1] == KERN_JAVA_INTERPRETER
#endif
#ifdef KERN_JAVA_APPLETVIEWER
			     || name[1] == KERN_JAVA_APPLETVIEWER
#endif
				 )))) {
			printpath(tcp, (size_t)info.oldval);
			tprintf(", %lu, ", (unsigned long)oldlen);
			if (info.newval == 0)
				tprints("NULL");
			else if (syserror(tcp))
				tprintf("%p", info.newval);
			else
				printpath(tcp, (size_t)info.newval);
			tprintf(", %ld}", (unsigned long)info.newlen);
		} else {
			tprintf("%p, %ld, %p, %ld}",
				info.oldval, (unsigned long)oldlen,
				info.newval, (unsigned long)info.newlen);
		}
	}

	free(name);
	return 0;
}

#ifdef MIPS

#ifndef __NEW_UTS_LEN
#define __NEW_UTS_LEN 64
#endif

static const struct xlat sysmips_operations[] = {
	{ SETNAME,		"SETNAME"	},
	{ FLUSH_CACHE,		"FLUSH_CACHE"	},
	{ MIPS_FIXADE,		"MIPS_FIXADE"	},
	{ MIPS_RDNVRAM,		"MIPS_RDNVRAM"	},
	{ MIPS_ATOMIC_SET,	"MIPS_ATOMIC_SET"	},
	{ 0, NULL }
};

int sys_sysmips(struct tcb *tcp)
{
	if (entering(tcp)) {
		printxval(sysmips_operations, tcp->u_arg[0], "???");
		if (!verbose(tcp)) {
			tprintf("%ld, %ld, %ld", tcp->u_arg[1], tcp->u_arg[2], tcp->u_arg[3]);
		} else if (tcp->u_arg[0] == SETNAME) {
			char nodename[__NEW_UTS_LEN + 1];
			if (umovestr(tcp, tcp->u_arg[1], (__NEW_UTS_LEN + 1), nodename) < 0)
				tprintf(", %#lx", tcp->u_arg[1]);
			else
				tprintf(", \"%.*s\"", (int)(__NEW_UTS_LEN + 1), nodename);
		} else if (tcp->u_arg[0] == MIPS_ATOMIC_SET) {
			tprintf(", %#lx, 0x%lx", tcp->u_arg[1], tcp->u_arg[2]);
		} else if (tcp->u_arg[0] == MIPS_FIXADE) {
			tprintf(", 0x%lx", tcp->u_arg[1]);
		} else {
			tprintf("%ld, %ld, %ld", tcp->u_arg[1], tcp->u_arg[2], tcp->u_arg[3]);
		}
	}

	return 0;
}

#endif /* MIPS */