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freebsd-dev/lib/libutil/libutil.h
Peter Wemm 43151ee6cf Merge user/peter/kinfo branch as of r185547 into head. 
This changes struct kinfo_filedesc and kinfo_vmentry such that they are
same on both 32 and 64 bit platforms like i386/amd64 and won't require
sysctl wrapping.

Two new OIDs are assigned.  The old ones are available under
COMPAT_FREEBSD7 - but it isn't that simple.  The superceded interface
was never actually released on 7.x.

The other main change is to pack the data passed to userland via the
sysctl.  kf_structsize and kve_structsize are reduced for the copyout.
If you have a process with 100,000+ sockets open, the unpacked records
require a 132MB+ copyout.  With packing, it is "only" ~35MB.  (Still
seriously unpleasant, but not quite as devastating).  A similar problem
exists for the vmentry structure - have lots and lots of shared libraries
and small mmaps and its copyout gets expensive too.

My immediate problem is valgrind.  It traditionally achieves this
functionality by parsing procfs output, in a packed format.  Secondly, when
tracing 32 bit binaries on amd64 under valgrind, it uses a cross compiled
32 bit binary which ran directly into the differing data structures in 32
vs 64 bit mode.  (valgrind uses this to track file descriptor operations
and this therefore affected every single 32 bit binary)

I've added two utility functions to libutil to unpack the structures into
a fixed record length and to make it a little more convenient to use.
2008-12-02 06:50:26 +00:00

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/*
* Copyright (c) 1996 Peter Wemm <peter@FreeBSD.org>.
* All rights reserved.
* Copyright (c) 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* Portions of this software were developed for the FreeBSD Project by
* ThinkSec AS and NAI Labs, the Security Research Division of Network
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
* ("CBOSS"), as part of the DARPA CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, is 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#ifndef _LIBUTIL_H_
#define _LIBUTIL_H_
#define PROPERTY_MAX_NAME 64
#define PROPERTY_MAX_VALUE 512
/* for properties.c */
typedef struct _property {
struct _property *next;
char *name;
char *value;
} *properties;
#ifdef _SYS_PARAM_H_
/* for pidfile.c */
struct pidfh {
int pf_fd;
char pf_path[MAXPATHLEN + 1];
__dev_t pf_dev;
ino_t pf_ino;
};
#endif
/* Avoid pulling in all the include files for no need */
struct termios;
struct winsize;
struct utmp;
struct in_addr;
struct kinfo_file;
struct kinfo_vmentry;
__BEGIN_DECLS
void clean_environment(const char * const *_white,
const char * const *_more_white);
int extattr_namespace_to_string(int _attrnamespace, char **_string);
int extattr_string_to_namespace(const char *_string, int *_attrnamespace);
int flopen(const char *_path, int _flags, ...);
void hexdump(const void *ptr, int length, const char *hdr, int flags);
void login(struct utmp *_ut);
int login_tty(int _fd);
int logout(const char *_line);
void logwtmp(const char *_line, const char *_name, const char *_host);
void trimdomain(char *_fullhost, int _hostsize);
int openpty(int *_amaster, int *_aslave, char *_name,
struct termios *_termp, struct winsize *_winp);
int forkpty(int *_amaster, char *_name,
struct termios *_termp, struct winsize *_winp);
int humanize_number(char *_buf, size_t _len, int64_t _number,
const char *_suffix, int _scale, int _flags);
int expand_number(const char *_buf, int64_t *_num);
const char *uu_lockerr(int _uu_lockresult);
int uu_lock(const char *_ttyname);
int uu_unlock(const char *_ttyname);
int uu_lock_txfr(const char *_ttyname, pid_t _pid);
int _secure_path(const char *_path, uid_t _uid, gid_t _gid);
properties properties_read(int fd);
void properties_free(properties list);
char *property_find(properties list, const char *name);
char *auth_getval(const char *name);
int realhostname(char *host, size_t hsize, const struct in_addr *ip);
struct sockaddr;
int realhostname_sa(char *host, size_t hsize, struct sockaddr *addr,
int addrlen);
int kld_isloaded(const char *name);
int kld_load(const char *name);
struct kinfo_file *
kinfo_getfile(pid_t _pid, int *_cntp);
struct kinfo_vmentry *
kinfo_getvmmap(pid_t _pid, int *_cntp);
#ifdef _STDIO_H_ /* avoid adding new includes */
char *fparseln(FILE *, size_t *, size_t *, const char[3], int);
#endif
#ifdef _PWD_H_
int pw_copy(int _ffd, int _tfd, const struct passwd *_pw, struct passwd *_old_pw);
struct passwd *pw_dup(const struct passwd *_pw);
int pw_edit(int _notsetuid);
int pw_equal(const struct passwd *_pw1, const struct passwd *_pw2);
void pw_fini(void);
int pw_init(const char *_dir, const char *_master);
char *pw_make(const struct passwd *_pw);
int pw_mkdb(const char *_user);
int pw_lock(void);
struct passwd *pw_scan(const char *_line, int _flags);
const char *pw_tempname(void);
int pw_tmp(int _mfd);
#endif
#ifdef _GRP_H_
int gr_equal(const struct group *gr1, const struct group *gr2);
char *gr_make(const struct group *gr);
struct group *gr_dup(const struct group *gr);
struct group *gr_scan(const char *line);
#endif
#ifdef _SYS_PARAM_H_
struct pidfh *pidfile_open(const char *path, mode_t mode, pid_t *pidptr);
int pidfile_write(struct pidfh *pfh);
int pidfile_close(struct pidfh *pfh);
int pidfile_remove(struct pidfh *pfh);
#endif
__END_DECLS
#define UU_LOCK_INUSE (1)
#define UU_LOCK_OK (0)
#define UU_LOCK_OPEN_ERR (-1)
#define UU_LOCK_READ_ERR (-2)
#define UU_LOCK_CREAT_ERR (-3)
#define UU_LOCK_WRITE_ERR (-4)
#define UU_LOCK_LINK_ERR (-5)
#define UU_LOCK_TRY_ERR (-6)
#define UU_LOCK_OWNER_ERR (-7)
/* return values from realhostname() */
#define HOSTNAME_FOUND (0)
#define HOSTNAME_INCORRECTNAME (1)
#define HOSTNAME_INVALIDADDR (2)
#define HOSTNAME_INVALIDNAME (3)
/* fparseln(3) */
#define FPARSELN_UNESCESC 0x01
#define FPARSELN_UNESCCONT 0x02
#define FPARSELN_UNESCCOMM 0x04
#define FPARSELN_UNESCREST 0x08
#define FPARSELN_UNESCALL 0x0f
/* pw_scan() */
#define PWSCAN_MASTER 0x01
#define PWSCAN_WARN 0x02
/* humanize_number(3) */
#define HN_DECIMAL 0x01
#define HN_NOSPACE 0x02
#define HN_B 0x04
#define HN_DIVISOR_1000 0x08
#define HN_GETSCALE 0x10
#define HN_AUTOSCALE 0x20
/* hexdump(3) */
#define HD_COLUMN_MASK 0xff
#define HD_DELIM_MASK 0xff00
#define HD_OMIT_COUNT (1 << 16)
#define HD_OMIT_HEX (1 << 17)
#define HD_OMIT_CHARS (1 << 18)
#endif /* !_LIBUTIL_H_ */
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