Massively extend libulog:
- Just like struct utmp, store strings inside struct utmpx itself. This is needed to make things like pututxline() work. - Add ut_id and ut_pid fields, even though they have little use in our implementation. - It turns out our "reboot" wtmp entries indicate a system boot, so remove REBOOT_TIME - Implement getutxline() and pututxline - Add getutxuser() and setutxfile(), which allows us to crawl wtmp and lastlog files as well. - Add _ULOG_POSIX_NAMES, so we can already use the POSIX names if we really want to.
This commit is contained in:
parent
2c201a9afe
commit
42782e4717
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=200153
@ -3,15 +3,25 @@
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LIB= ulog
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SHLIB_MAJOR= 0
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INCS= ulog.h
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SRCS= ulog.h ulog_getutxent.c ulog_internal.h \
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ulog_login.c ulog_login_pseudo.c
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SRCS= ulog.h ulog_getutxent.c ulog_internal.h ulog_login.c \
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ulog_login_pseudo.c ulog_pututxline.c ulog_util.c
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MAN= ulog_getutxent.3 ulog_login.3
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MAN= ulog_getutxent.3 ulog_login.3 ulog_setutxfile.3
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MLINKS+=ulog_getutxent.3 ulog_endutxent.3 \
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ulog_getutxent.3 ulog_getutxline.3 \
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ulog_getutxent.3 ulog_pututxline.3 \
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ulog_getutxent.3 ulog_setutxent.3 \
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ulog_login.3 ulog_login_pseudo.3 \
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ulog_login.3 ulog_logout.3 \
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ulog_login.3 ulog_logout_pseudo.3
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ulog_login.3 ulog_logout_pseudo.3 \
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ulog_setutxfile.3 ulog_getutxuser.3
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# Add links to <utmpx.h>-style functions.
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MLINKS+=ulog_endutxent.3 endutxent.3 \
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ulog_getutxent.3 getutxent.3 \
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ulog_getutxline.3 getutxline.3 \
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ulog_pututxline.3 pututxline.3 \
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ulog_setutxent.3 setutxent.3
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WARNS?= 6
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@ -5,9 +5,13 @@
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FBSD_1.2 {
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ulog_endutxent;
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ulog_getutxent;
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ulog_getutxline;
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ulog_getutxuser;
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ulog_login;
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ulog_login_pseudo;
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ulog_logout;
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ulog_logout_pseudo;
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ulog_pututxline;
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ulog_setutxent;
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ulog_setutxfile;
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};
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@ -31,6 +31,12 @@
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#include <sys/cdefs.h>
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#include <sys/_timeval.h>
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#include <sys/_types.h>
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#ifndef _PID_T_DECLARED
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typedef __pid_t pid_t;
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#define _PID_T_DECLARED
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#endif
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/*
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* libulog.
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@ -42,61 +48,61 @@
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* processes as well, provided that they hold a file descriptor to a
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* pseudo-terminal master device.
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*
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* Unlike struct utmpx, the buffers containing the strings are not
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* stored inside struct ulog_utmpx itself. Processes should never
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* handcraft these structures anyway.
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*
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* This library (or at least parts of it) will hopefully deprecate over
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* time, when we provide the <utmpx.h> API.
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*/
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#define _UTX_USERDISPSIZE 16
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#define _UTX_LINEDISPSIZE 8
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#define _UTX_HOSTDISPSIZE 16
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struct ulog_utmpx {
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char *ut_user;
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#if 0
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char *ut_id;
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#endif
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char *ut_line;
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char *ut_host;
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#if 0
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pid_t ut_pid;
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#endif
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short ut_type;
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char ut_user[32];
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char ut_id[8]; /* XXX: unsupported. */
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char ut_line[32];
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char ut_host[256];
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pid_t ut_pid; /* XXX: unsupported. */
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short ut_type;
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#define EMPTY 0
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#if 0
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#define BOOT_TIME 1
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#endif
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#define OLD_TIME 2
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#define NEW_TIME 3
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#define USER_PROCESS 4
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#if 0
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#define INIT_PROCESS 5
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#define LOGIN_PROCESS 6
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#endif
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#define INIT_PROCESS 5 /* XXX: unsupported. */
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#define LOGIN_PROCESS 6 /* XXX: unsupported. */
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#define DEAD_PROCESS 7
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#define SHUTDOWN_TIME 8
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#define REBOOT_TIME 9
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struct timeval ut_tv;
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struct timeval ut_tv;
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};
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__BEGIN_DECLS
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/* POSIX routines. */
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void ulog_endutxent(void);
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struct ulog_utmpx *ulog_getutxent(void);
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#if 0
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struct ulog_utmpx *ulog_getutxid(const struct ulog_utmpx *id);
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struct ulog_utmpx *ulog_getutxline(const struct ulog_utmpx *line);
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struct ulog_utmpx *ulog_pututxline(const struct ulog_utmpx *utmpx);
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struct ulog_utmpx *ulog_getutxid(const struct ulog_utmpx *);
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#endif
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struct ulog_utmpx *ulog_getutxline(const struct ulog_utmpx *);
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struct ulog_utmpx *ulog_pututxline(const struct ulog_utmpx *);
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void ulog_setutxent(void);
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/* Extensions. */
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struct ulog_utmpx *ulog_getutxuser(const char *);
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int ulog_setutxfile(int, const char *);
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#define UTXF_UTMP 0
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#define UTXF_WTMP 1
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#define UTXF_LASTLOG 2
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/* Login/logout utility functions. */
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void ulog_login(const char *, const char *, const char *);
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void ulog_login_pseudo(int, const char *);
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void ulog_logout(const char *);
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void ulog_logout_pseudo(int);
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__END_DECLS
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#ifdef _ULOG_POSIX_NAMES
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#define utmpx ulog_utmpx
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#define endutxent ulog_endutxent
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#define getutxent ulog_getutxent
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#define getutxline ulog_getutxline
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#define pututxline ulog_pututxline
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#define setutxent ulog_setutxent
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#endif /* _ULOG_POSIX_NAMES */
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#endif /* !_ULOG_H_ */
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@ -24,11 +24,13 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd December 2, 2009
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.Dd December 5, 2009
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.Os
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.Dt ULOG_GETUTXENT 3
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.Sh NAME
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.Nm ulog_getutxent ,
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.Nm ulog_getutxline ,
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.Nm ulog_pututxline ,
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.Nm ulog_setutxent ,
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.Nm ulog_endutxent
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.Nd read user login records
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@ -38,6 +40,10 @@
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.In ulog.h
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.Ft struct ulog_utmpx *
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.Fn ulog_getutxent "void"
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.Ft struct ulog_utmpx *
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.Fn ulog_getutxline "const struct ulog_utmpx *line"
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.Ft struct ulog_utmpx *
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.Fn ulog_pututxline "const struct ulog_utmpx *utmpx"
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.Ft void
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.Fn ulog_setutxent "void"
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.Ft void
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@ -49,10 +55,12 @@ function returns a pointer to an object, with the following structure,
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containing stored information of an active user login session.
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.Bd -literal
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struct ulog_utmpx {
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char *ut_user; /* Username. */
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char *ut_line; /* TTY device. */
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char *ut_host; /* Remote hostname. */
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short ut_type; /* Type of entry. */
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char ut_user[]; /* Username. */
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char ut_id[]; /* Private data. */
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char ut_line[]; /* TTY device. */
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char ut_host[]; /* Remote hostname. */
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pid_t ut_pid; /* Process identifier. */
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short ut_type; /* Type of entry. */
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struct timeval ut_tv; /* Timestamp. */
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};
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.Ed
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@ -61,6 +69,9 @@ The fields are as follows:
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.Bl -tag -width ut_user
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.It Fa ut_user
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The username of the logged in user.
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.It Fa ut_id
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Private data that can be used to later identify the record.
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This implementation is not capable of storing this value on disk.
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.It Fa ut_line
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The pathname of the TTY device, without the leading
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.Pa /dev/
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@ -68,6 +79,9 @@ directory.
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.It Fa ut_host
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An optional hostname of a remote system, if the login session is
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provided through a networked login service.
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.It Fa ut_pid
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Process identifier of the session leader of the login session.
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This implementation is not capable of storing this value on disk.
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.It Fa ut_type
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The
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.Fa ut_type
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@ -76,28 +90,42 @@ following values:
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.Bl -tag -width SHUTDOWN_TIME
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.It Dv EMPTY
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No valid user accounting information.
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.It Dv BOOT_TIME
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Identifies time of system boot.
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.It Dv OLD_TIME
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Identifies time when system clock changed.
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.It Dv NEW_TIME
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Identifies time after system clock changed.
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.It Dv USER_PROCESS
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Identifies a process.
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.It Dv INIT_PROCESS
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Identifies a process spawned by the init process.
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.It Dv LOGIN_PROCESS
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Identifies the session leader of a logged-in user.
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.It Dv DEAD_PROCESS
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Identifies a session leader who has exited.
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.It Dv SHUTDOWN_TIME
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Identifies time when system was shut down.
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.It Dv REBOOT_TIME
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Identifies time when system was rebooted.
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.El
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.It Fa ut_tv
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Timestamp indicating when the entry was last modified.
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.El
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.Pp
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This implementation guarantees all strings returned in the structure to
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be null terminated.
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.Pp
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The
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.Fn ulog_getutxent
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function reads the next entry from the utmp file, opening the file if
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necessary.
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The
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.Fn ulog_getutxline
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function reads entries from the utmp file, until finding an entry which
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shares the same
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.Fa ut_line
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as the structure
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.Fa line .
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The
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.Fn ulog_setutxent
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opens the file, closing it first if already opened.
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The
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@ -106,15 +134,50 @@ function closes any open files.
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.Pp
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The
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.Fn ulog_getutxent
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function reads from the beginning of the file until and EOF is
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and
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.Fn ulog_getutxline
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functions read from the beginning of the file until and EOF is
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encountered.
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.Pp
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The
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.Fn ulog_pututxline
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function writes a new entry to the file.
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.Sh RETURN VALUES
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The
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.Fn ulog_getutxent
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function returns a null pointer on EOF or error.
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and
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.Fn ulog_getutxline
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functions return a null pointer on EOF or error.
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.Sh SEE ALSO
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.Xr ulog_login 3 ,
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.Xr ulog_setutxfile 3 ,
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.Xr utmp 5
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.Sh STANDARDS
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This interface is similar to
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.In utmpx.h
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described in
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.St -p1003.1-2008 ,
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but incompatible.
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The underlying file format does not allow a correctly behaving
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implementation of the standardized interface.
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.Pp
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This programming interface has been designed to ease the migration
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towards
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.In utmpx.h .
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If
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.Dv _ULOG_POSIX_NAMES
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is set before inclusion of
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.In ulog.h ,
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it is also possible to use the
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.Vt utmpx
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structure and the
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.Fn getutxent ,
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.Fn getutxline ,
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.Fn pututxline ,
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.Fn setutxent
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and
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.Fn endutxent
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functions.
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.Sh HISTORY
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These functions appeared in
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.Fx 9.0 .
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@ -27,6 +27,9 @@
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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@ -35,6 +38,7 @@ __FBSDID("$FreeBSD$");
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#include "ulog_internal.h"
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static FILE *ufile;
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static int ufiletype = -1;
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void
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ulog_endutxent(void)
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@ -44,56 +48,255 @@ ulog_endutxent(void)
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ufile = NULL;
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}
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struct ulog_utmpx *
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ulog_getutxent(void)
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/*
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* Conversion from on-disk formats to generic ulog_utmpx structure.
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*/
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static void
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ulog_futmp_to_utmpx(const struct futmp *ut, struct ulog_utmpx *utx)
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{
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memset(utx, 0, sizeof *utx);
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#define COPY_STRING(field) do { \
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strncpy(utx->ut_ ## field, ut->ut_ ## field, \
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MIN(sizeof utx->ut_ ## field - 1, sizeof ut->ut_ ## field));\
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} while (0)
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COPY_STRING(user);
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COPY_STRING(line);
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COPY_STRING(host);
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#undef COPY_STRING
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#define MATCH(field, value) (strcmp(utx->ut_ ## field, (value)) == 0)
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if (MATCH(user, "reboot") && MATCH(line, "~"))
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utx->ut_type = BOOT_TIME;
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else if (MATCH(user, "date") && MATCH(line, "|"))
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utx->ut_type = OLD_TIME;
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else if (MATCH(user, "date") && MATCH(line, "{"))
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utx->ut_type = NEW_TIME;
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else if (MATCH(user, "shutdown") && MATCH(line, "~"))
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utx->ut_type = SHUTDOWN_TIME;
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else if (MATCH(user, "") && MATCH(host, ""))
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utx->ut_type = DEAD_PROCESS;
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else if (!MATCH(user, "") && !MATCH(line, "") && ut->ut_time != 0)
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utx->ut_type = USER_PROCESS;
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else
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utx->ut_type = EMPTY;
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utx->ut_tv.tv_sec = _time32_to_time(ut->ut_time);
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utx->ut_tv.tv_usec = 0;
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}
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static void
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ulog_flastlog_to_utmpx(const struct flastlog *ll, struct ulog_utmpx *utx)
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{
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memset(utx, 0, sizeof *utx);
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#define COPY_STRING(field) do { \
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strncpy(utx->ut_ ## field, ll->ll_ ## field, \
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MIN(sizeof utx->ut_ ## field - 1, sizeof ll->ll_ ## field));\
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} while (0)
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COPY_STRING(line);
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COPY_STRING(host);
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#undef COPY_STRING
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if (!MATCH(line, "") && ll->ll_time != 0)
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utx->ut_type = USER_PROCESS;
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else
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utx->ut_type = EMPTY;
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utx->ut_tv.tv_sec = _time32_to_time(ll->ll_time);
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utx->ut_tv.tv_usec = 0;
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}
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/*
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* File I/O.
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*/
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static inline off_t
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ulog_tell(void)
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{
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if (ufiletype == UTXF_LASTLOG)
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return (ftello(ufile) / sizeof(struct flastlog));
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else
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return (ftello(ufile) / sizeof(struct futmp));
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}
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static struct ulog_utmpx *
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ulog_read(off_t off, int whence, int resolve_user)
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{
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struct futmp ut;
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static struct ulog_utmpx utx;
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/* Open the utmp file if not already done so. */
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if (ufile == NULL)
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ulog_setutxent();
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if (ufile == NULL)
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return (NULL);
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if (fread(&ut, sizeof ut, 1, ufile) != 1)
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/* Only allow seeking to move forward. */
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if (whence == SEEK_SET && ulog_tell() > off)
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return (NULL);
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#define COPY_STRING(field) do { \
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free(utx.ut_ ## field); \
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utx.ut_ ## field = strndup(ut.ut_ ## field, \
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sizeof ut.ut_ ## field); \
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if (utx.ut_ ## field == NULL) \
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utx.ut_ ## field = __DECONST(char *, ""); \
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} while (0)
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COPY_STRING(user);
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COPY_STRING(line);
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COPY_STRING(host);
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utx.ut_tv.tv_sec = _time32_to_time(ut.ut_time);
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utx.ut_tv.tv_usec = 0;
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#define MATCH(field, value) (strcmp(utx.ut_ ## field, (value)) == 0)
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if (MATCH(user, "date") && MATCH(line, "|"))
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utx.ut_type = OLD_TIME;
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else if (MATCH(user, "date") && MATCH(line, "{"))
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utx.ut_type = NEW_TIME;
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else if (MATCH(user, "shutdown") && MATCH(line, "~"))
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utx.ut_type = SHUTDOWN_TIME;
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else if (MATCH(user, "reboot") && MATCH(line, "~"))
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utx.ut_type = REBOOT_TIME;
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else if (MATCH(user, "") && MATCH(host, ""))
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utx.ut_type = DEAD_PROCESS;
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else if (!MATCH(user, ""))
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utx.ut_type = USER_PROCESS;
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else
|
||||
utx.ut_type = EMPTY;
|
||||
|
||||
|
||||
if (ufiletype == UTXF_LASTLOG) {
|
||||
struct flastlog ll;
|
||||
struct passwd *pw = NULL;
|
||||
uid_t uid;
|
||||
|
||||
if (fseeko(ufile, off * sizeof ll, whence) != 0)
|
||||
return (NULL);
|
||||
uid = ulog_tell();
|
||||
if (fread(&ll, sizeof ll, 1, ufile) != 1)
|
||||
return (NULL);
|
||||
ulog_flastlog_to_utmpx(&ll, &utx);
|
||||
if (utx.ut_type == USER_PROCESS && resolve_user)
|
||||
pw = getpwuid(uid);
|
||||
if (pw != NULL)
|
||||
strlcpy(utx.ut_user, pw->pw_name, sizeof utx.ut_user);
|
||||
else
|
||||
sprintf(utx.ut_user, "%u", (unsigned int)uid);
|
||||
} else {
|
||||
struct futmp ut;
|
||||
|
||||
if (fseeko(ufile, off * sizeof(struct futmp), whence) != 0)
|
||||
return (NULL);
|
||||
if (fread(&ut, sizeof ut, 1, ufile) != 1)
|
||||
return (NULL);
|
||||
ulog_futmp_to_utmpx(&ut, &utx);
|
||||
}
|
||||
return (&utx);
|
||||
}
|
||||
|
||||
/*
|
||||
* getutxent().
|
||||
*
|
||||
* Read the next entry from the file.
|
||||
*/
|
||||
|
||||
struct ulog_utmpx *
|
||||
ulog_getutxent(void)
|
||||
{
|
||||
|
||||
return ulog_read(0, SEEK_CUR, 1);
|
||||
}
|
||||
|
||||
/*
|
||||
* ulog_getutxline().
|
||||
*
|
||||
* Read entries from the file, until reaching an entry which matches the
|
||||
* provided TTY device name. We can optimize the case for utmp files,
|
||||
* because they are indexed by TTY device name.
|
||||
*/
|
||||
|
||||
struct ulog_utmpx *
|
||||
ulog_getutxline(const struct ulog_utmpx *line)
|
||||
{
|
||||
struct ulog_utmpx *utx;
|
||||
|
||||
if (ufile == NULL)
|
||||
ulog_setutxent();
|
||||
if (ufile == NULL)
|
||||
return (NULL);
|
||||
|
||||
if (ufiletype == UTXF_UTMP) {
|
||||
unsigned int slot;
|
||||
|
||||
slot = ulog_ttyslot(line->ut_line);
|
||||
if (slot == 0)
|
||||
return (NULL);
|
||||
utx = ulog_read(slot, SEEK_SET, 1);
|
||||
if (utx->ut_type == USER_PROCESS &&
|
||||
strcmp(utx->ut_line, line->ut_line) == 0)
|
||||
return (utx);
|
||||
return (NULL);
|
||||
} else {
|
||||
for (;;) {
|
||||
utx = ulog_read(0, SEEK_CUR, 1);
|
||||
if (utx == NULL)
|
||||
return (NULL);
|
||||
if (utx->ut_type == USER_PROCESS &&
|
||||
strcmp(utx->ut_line, line->ut_line) == 0)
|
||||
return (utx);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* ulog_getutxuser().
|
||||
*
|
||||
* Read entries from the file, until reaching an entry which matches the
|
||||
* provided username. We can optimize the case for lastlog files,
|
||||
* because they are indexed by user ID.
|
||||
*/
|
||||
|
||||
struct ulog_utmpx *
|
||||
ulog_getutxuser(const char *user)
|
||||
{
|
||||
struct ulog_utmpx *utx;
|
||||
|
||||
if (ufiletype == UTXF_LASTLOG) {
|
||||
struct passwd *pw;
|
||||
|
||||
pw = getpwnam(user);
|
||||
if (pw == NULL)
|
||||
return (NULL);
|
||||
utx = ulog_read(pw->pw_uid, SEEK_SET, 0);
|
||||
if (utx != NULL)
|
||||
strlcpy(utx->ut_user, user, sizeof utx->ut_user);
|
||||
return (utx);
|
||||
} else {
|
||||
for (;;) {
|
||||
utx = ulog_read(0, SEEK_CUR, 1);
|
||||
if (utx == NULL)
|
||||
return (NULL);
|
||||
if (utx->ut_type == USER_PROCESS &&
|
||||
strcmp(utx->ut_user, user) == 0)
|
||||
return (utx);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* ulog_setutxfile().
|
||||
*
|
||||
* Switch to a different record file. When no filename is provided, the
|
||||
* system default is opened.
|
||||
*/
|
||||
|
||||
int
|
||||
ulog_setutxfile(int type, const char *file)
|
||||
{
|
||||
|
||||
/* Supply default files. */
|
||||
switch (type) {
|
||||
case UTXF_UTMP:
|
||||
if (file == NULL)
|
||||
file = _PATH_UTMP;
|
||||
break;
|
||||
case UTXF_WTMP:
|
||||
if (file == NULL)
|
||||
file = _PATH_WTMP;
|
||||
break;
|
||||
case UTXF_LASTLOG:
|
||||
if (file == NULL)
|
||||
file = _PATH_LASTLOG;
|
||||
break;
|
||||
default:
|
||||
return (-1);
|
||||
}
|
||||
|
||||
if (ufile != NULL)
|
||||
fclose(ufile);
|
||||
ufile = fopen(file, "r");
|
||||
ufiletype = type;
|
||||
if (ufile == NULL)
|
||||
return (-1);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* ulog_endutxfile().
|
||||
*
|
||||
* Close any opened files.
|
||||
*/
|
||||
|
||||
void
|
||||
ulog_setutxent(void)
|
||||
{
|
||||
|
||||
if (ufile != NULL)
|
||||
fclose(ufile);
|
||||
ufile = fopen(_PATH_UTMP, "r");
|
||||
ulog_setutxfile(UTXF_UTMP, NULL);
|
||||
}
|
||||
|
@ -33,6 +33,8 @@
|
||||
|
||||
#include "ulog.h"
|
||||
|
||||
unsigned int ulog_ttyslot(const char *);
|
||||
|
||||
/*
|
||||
* On-disk format.
|
||||
*/
|
||||
|
@ -24,7 +24,7 @@
|
||||
.\"
|
||||
.\" $FreeBSD$
|
||||
.\"
|
||||
.Dd December 2, 2009
|
||||
.Dd December 5, 2009
|
||||
.Os
|
||||
.Dt ULOG_LOGIN 3
|
||||
.Sh NAME
|
||||
|
@ -27,109 +27,48 @@
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <fcntl.h>
|
||||
#include <inttypes.h>
|
||||
#include <sys/time.h>
|
||||
#include <paths.h>
|
||||
#include <pwd.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <time.h>
|
||||
#include <timeconv.h>
|
||||
#include <ttyent.h>
|
||||
|
||||
#include "ulog_internal.h"
|
||||
|
||||
void
|
||||
ulog_login(const char *line, const char *user, const char *host)
|
||||
{
|
||||
struct futmp fu;
|
||||
struct flastlog fl;
|
||||
int fd;
|
||||
struct ulog_utmpx utx;
|
||||
|
||||
/* Remove /dev/ component. */
|
||||
if (strncmp(line, _PATH_DEV, sizeof _PATH_DEV - 1) == 0)
|
||||
line += sizeof _PATH_DEV - 1;
|
||||
|
||||
/* Prepare log entries. */
|
||||
memset(&fu, 0, sizeof fu);
|
||||
strlcpy(fu.ut_line, line, sizeof fu.ut_line);
|
||||
strlcpy(fu.ut_user, user, sizeof fu.ut_user);
|
||||
if (host != NULL)
|
||||
strlcpy(fu.ut_host, host, sizeof fu.ut_host);
|
||||
fu.ut_time = _time_to_time32(time(NULL));
|
||||
memset(&utx, 0, sizeof utx);
|
||||
|
||||
fl.ll_time = fu.ut_time;
|
||||
memcpy(fl.ll_line, fu.ut_line, sizeof fl.ll_line);
|
||||
memcpy(fl.ll_host, fu.ut_host, sizeof fl.ll_host);
|
||||
/* XXX: ut_id, ut_pid missing. */
|
||||
utx.ut_type = USER_PROCESS;
|
||||
strncpy(utx.ut_line, line, sizeof utx.ut_line);
|
||||
strncpy(utx.ut_user, user, sizeof utx.ut_user);
|
||||
strncpy(utx.ut_host, host, sizeof utx.ut_host);
|
||||
gettimeofday(&utx.ut_tv, NULL);
|
||||
|
||||
/* Update utmp entry. */
|
||||
if ((fd = open(_PATH_UTMP, O_WRONLY|O_CREAT, 0644)) >= 0) {
|
||||
struct ttyent *ty;
|
||||
int idx;
|
||||
|
||||
setttyent();
|
||||
for (idx = 1; (ty = getttyent()) != NULL; ++idx) {
|
||||
if (strcmp(ty->ty_name, line) != 0)
|
||||
continue;
|
||||
lseek(fd, (off_t)(idx * sizeof fu), L_SET);
|
||||
write(fd, &fu, sizeof fu);
|
||||
break;
|
||||
}
|
||||
endttyent();
|
||||
close(fd);
|
||||
}
|
||||
|
||||
/* Add wtmp entry. */
|
||||
if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) {
|
||||
write(fd, &fu, sizeof fu);
|
||||
close(fd);
|
||||
}
|
||||
|
||||
/* Update lastlog entry. */
|
||||
if ((fd = open(_PATH_LASTLOG, O_WRONLY, 0)) >= 0) {
|
||||
struct passwd *pw;
|
||||
|
||||
pw = getpwnam(user);
|
||||
if (pw != NULL) {
|
||||
lseek(fd, (off_t)(pw->pw_uid * sizeof fl), L_SET);
|
||||
write(fd, &fl, sizeof fl);
|
||||
}
|
||||
close(fd);
|
||||
}
|
||||
ulog_pututxline(&utx);
|
||||
}
|
||||
|
||||
void
|
||||
ulog_logout(const char *line)
|
||||
{
|
||||
struct futmp ut;
|
||||
int fd, found;
|
||||
struct ulog_utmpx utx;
|
||||
|
||||
/* Remove /dev/ component. */
|
||||
if (strncmp(line, _PATH_DEV, sizeof _PATH_DEV - 1) == 0)
|
||||
line += sizeof _PATH_DEV - 1;
|
||||
|
||||
/* Mark entry in utmp as logged out. */
|
||||
if ((fd = open(_PATH_UTMP, O_RDWR, 0)) < 0)
|
||||
return;
|
||||
found = 0;
|
||||
while (read(fd, &ut, sizeof ut) == sizeof ut) {
|
||||
if (ut.ut_user[0] == '\0' ||
|
||||
strncmp(ut.ut_line, line, sizeof ut.ut_line) != 0)
|
||||
continue;
|
||||
memset(ut.ut_user, 0, sizeof ut.ut_user);
|
||||
memset(ut.ut_host, 0, sizeof ut.ut_host);
|
||||
ut.ut_time = _time_to_time32(time(NULL));
|
||||
lseek(fd, -(off_t)sizeof ut, L_INCR);
|
||||
write(fd, &ut, sizeof ut);
|
||||
found = 1;
|
||||
}
|
||||
close(fd);
|
||||
if (!found)
|
||||
return;
|
||||
memset(&utx, 0, sizeof utx);
|
||||
|
||||
/* utmp entry found. Also add logout entry to wtmp. */
|
||||
if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) {
|
||||
write(fd, &ut, sizeof ut);
|
||||
close(fd);
|
||||
}
|
||||
/* XXX: ut_id, ut_pid missing. ut_line not needed */
|
||||
utx.ut_type = DEAD_PROCESS;
|
||||
strncpy(utx.ut_line, line, sizeof utx.ut_line);
|
||||
gettimeofday(&utx.ut_tv, NULL);
|
||||
|
||||
ulog_pututxline(&utx);
|
||||
}
|
||||
|
208
lib/libulog/ulog_pututxline.c
Normal file
208
lib/libulog/ulog_pututxline.c
Normal file
@ -0,0 +1,208 @@
|
||||
/*-
|
||||
* Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
|
||||
* 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.
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <fcntl.h>
|
||||
#include <pwd.h>
|
||||
#include <string.h>
|
||||
#include <timeconv.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#include "ulog_internal.h"
|
||||
|
||||
static void
|
||||
ulog_utmpx_to_futmp(const struct ulog_utmpx *utx, struct futmp *ut)
|
||||
{
|
||||
|
||||
memset(ut, 0, sizeof *ut);
|
||||
#define COPY_STRING(field) do { \
|
||||
strncpy(ut->ut_ ## field, utx->ut_ ## field, \
|
||||
MIN(sizeof ut->ut_ ## field, sizeof utx->ut_ ## field)); \
|
||||
} while (0)
|
||||
switch (utx->ut_type) {
|
||||
case BOOT_TIME:
|
||||
strcpy(ut->ut_user, "reboot");
|
||||
ut->ut_line[0] = '~';
|
||||
break;
|
||||
case OLD_TIME:
|
||||
strcpy(ut->ut_user, "date");
|
||||
ut->ut_line[0] = '|';
|
||||
break;
|
||||
case NEW_TIME:
|
||||
strcpy(ut->ut_user, "date");
|
||||
ut->ut_line[0] = '{';
|
||||
break;
|
||||
case USER_PROCESS:
|
||||
COPY_STRING(user);
|
||||
COPY_STRING(line);
|
||||
COPY_STRING(host);
|
||||
break;
|
||||
case DEAD_PROCESS:
|
||||
COPY_STRING(line);
|
||||
break;
|
||||
case SHUTDOWN_TIME:
|
||||
strcpy(ut->ut_user, "shutdown");
|
||||
ut->ut_line[0] = '~';
|
||||
break;
|
||||
}
|
||||
#undef COPY_STRING
|
||||
ut->ut_time = _time_to_time32(utx->ut_tv.tv_sec);
|
||||
}
|
||||
|
||||
static void
|
||||
ulog_utmpx_to_flastlog(const struct ulog_utmpx *utx, struct flastlog *ll)
|
||||
{
|
||||
|
||||
memset(ll, 0, sizeof *ll);
|
||||
#define COPY_STRING(field) do { \
|
||||
strncpy(ll->ll_ ## field, utx->ut_ ## field, \
|
||||
MIN(sizeof ll->ll_ ## field, sizeof utx->ut_ ## field)); \
|
||||
} while (0)
|
||||
switch (utx->ut_type) {
|
||||
case USER_PROCESS:
|
||||
COPY_STRING(line);
|
||||
COPY_STRING(host);
|
||||
break;
|
||||
}
|
||||
#undef COPY_STRING
|
||||
ll->ll_time = _time_to_time32(utx->ut_tv.tv_sec);
|
||||
}
|
||||
|
||||
static void
|
||||
ulog_write_utmp_fast(const struct futmp *ut)
|
||||
{
|
||||
unsigned int idx;
|
||||
char line[sizeof ut->ut_line + 1];
|
||||
int fd;
|
||||
|
||||
if ((fd = open(_PATH_UTMP, O_WRONLY|O_CREAT, 0644)) < 0)
|
||||
return;
|
||||
strlcpy(line, ut->ut_line, sizeof line);
|
||||
idx = ulog_ttyslot(line);
|
||||
if (idx > 0) {
|
||||
lseek(fd, (off_t)(idx * sizeof *ut), SEEK_SET);
|
||||
write(fd, ut, sizeof *ut);
|
||||
}
|
||||
close(fd);
|
||||
}
|
||||
|
||||
static int
|
||||
ulog_write_utmp_slow(const struct futmp *ut)
|
||||
{
|
||||
struct futmp utf;
|
||||
int fd, found;
|
||||
|
||||
if ((fd = open(_PATH_UTMP, O_RDWR, 0)) < 0)
|
||||
return (0);
|
||||
found = 0;
|
||||
while (read(fd, &utf, sizeof utf) == sizeof utf) {
|
||||
if (utf.ut_user[0] == '\0' ||
|
||||
strncmp(utf.ut_line, ut->ut_line, sizeof utf.ut_line) != 0)
|
||||
continue;
|
||||
lseek(fd, -(off_t)sizeof utf, SEEK_CUR);
|
||||
write(fd, &ut, sizeof ut);
|
||||
found = 1;
|
||||
}
|
||||
close(fd);
|
||||
return (found);
|
||||
}
|
||||
|
||||
static void
|
||||
ulog_write_wtmp(const struct futmp *ut)
|
||||
{
|
||||
int fd;
|
||||
|
||||
if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
|
||||
return;
|
||||
write(fd, ut, sizeof *ut);
|
||||
close(fd);
|
||||
}
|
||||
|
||||
static void
|
||||
ulog_write_lastlog(const struct flastlog *ll, const char *user)
|
||||
{
|
||||
struct passwd *pw;
|
||||
int fd;
|
||||
|
||||
if ((fd = open(_PATH_LASTLOG, O_WRONLY, 0)) < 0)
|
||||
return;
|
||||
pw = getpwnam(user);
|
||||
if (pw != NULL) {
|
||||
lseek(fd, (off_t)(pw->pw_uid * sizeof *ll), SEEK_SET);
|
||||
write(fd, ll, sizeof *ll);
|
||||
}
|
||||
close(fd);
|
||||
}
|
||||
|
||||
struct ulog_utmpx *
|
||||
ulog_pututxline(const struct ulog_utmpx *utmpx)
|
||||
{
|
||||
static struct ulog_utmpx utx;
|
||||
struct futmp ut;
|
||||
struct flastlog ll;
|
||||
char user[sizeof utmpx->ut_user + 1];
|
||||
|
||||
switch (utmpx->ut_type) {
|
||||
case BOOT_TIME:
|
||||
case OLD_TIME:
|
||||
case NEW_TIME:
|
||||
case SHUTDOWN_TIME:
|
||||
ulog_utmpx_to_futmp(utmpx, &ut);
|
||||
|
||||
/* Only log to wtmp. */
|
||||
ulog_write_wtmp(&ut);
|
||||
break;
|
||||
case USER_PROCESS:
|
||||
ulog_utmpx_to_futmp(utmpx, &ut);
|
||||
ulog_utmpx_to_flastlog(utmpx, &ll);
|
||||
|
||||
/* Log to utmp, wtmp and lastlog. */
|
||||
ulog_write_utmp_fast(&ut);
|
||||
ulog_write_wtmp(&ut);
|
||||
strlcpy(user, utmpx->ut_user, sizeof user);
|
||||
ulog_write_lastlog(&ll, user);
|
||||
break;
|
||||
case DEAD_PROCESS:
|
||||
ulog_utmpx_to_futmp(utmpx, &ut);
|
||||
|
||||
/* Only log to wtmp if logged in utmp. */
|
||||
if (ulog_write_utmp_slow(&ut))
|
||||
ulog_write_wtmp(&ut);
|
||||
break;
|
||||
default:
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
/* XXX: Can't we just return utmpx itself? */
|
||||
memcpy(&utx, utmpx, sizeof utx);
|
||||
utx.ut_user[sizeof utx.ut_user - 1] = '\0';
|
||||
utx.ut_line[sizeof utx.ut_line - 1] = '\0';
|
||||
utx.ut_host[sizeof utx.ut_host - 1] = '\0';
|
||||
return (&utx);
|
||||
}
|
94
lib/libulog/ulog_setutxfile.3
Normal file
94
lib/libulog/ulog_setutxfile.3
Normal file
@ -0,0 +1,94 @@
|
||||
.\" Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
|
||||
.\" 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.
|
||||
.\"
|
||||
.\" 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.
|
||||
.\"
|
||||
.\" $FreeBSD$
|
||||
.\"
|
||||
.Dd December 5, 2009
|
||||
.Os
|
||||
.Dt ULOG_SETUTXFILE 3
|
||||
.Sh NAME
|
||||
.Nm ulog_setutxfile ,
|
||||
.Nm ulog_getutxuser
|
||||
.Nd additional user login records management
|
||||
.Sh LIBRARY
|
||||
.Lb libulog
|
||||
.Sh SYNOPSIS
|
||||
.In ulog.h
|
||||
.Ft int
|
||||
.Fn ulog_setutxfile "int type" "const char *file"
|
||||
.Ft struct ulog_utmpx *
|
||||
.Fn ulog_getutxuser "const char *user"
|
||||
.Sh DESCRIPTION
|
||||
The
|
||||
.Fn ulog_setutxfile
|
||||
and
|
||||
.Fn ulog_getutxuser
|
||||
functions are extensions to the standard
|
||||
.In ulog.h
|
||||
interface.
|
||||
.Pp
|
||||
The
|
||||
.Fn ulog_setutxfile
|
||||
function is similar to
|
||||
.Fn ulog_setutxent ,
|
||||
but is capable of returning an error code and also gives access to other
|
||||
login record files by using one of the following values for
|
||||
.Fa type :
|
||||
.Bl -tag -width UTXF_LASTLOG
|
||||
.It Dv UTXF_UTMP
|
||||
Open the default
|
||||
.Nm utmp
|
||||
file, which is indexed by TTY device.
|
||||
.It Dv UTXF_WTMP
|
||||
Open the
|
||||
.Nm wtmp
|
||||
file, which is indexed by time.
|
||||
.It Dv UTXF_LASTLOG
|
||||
Open the
|
||||
.Nm lastlog
|
||||
file, which is indexed by user ID.
|
||||
.El
|
||||
.Pp
|
||||
The
|
||||
.Fa file
|
||||
argument determines the file to be opened.
|
||||
If left null, implementation-defined default file is opened.
|
||||
.Pp
|
||||
The
|
||||
.Fn ulog_getutxuser
|
||||
searches the currently opened file until an entry is found whose
|
||||
.Fa ut_user
|
||||
is equal to the
|
||||
.Fa user
|
||||
argument.
|
||||
.Sh RETURN VALUES
|
||||
If succesful,
|
||||
.Fn ulog_setutxfile
|
||||
returns 0.
|
||||
It returns -1 on failure.
|
||||
.Sh SEE ALSO
|
||||
.Xr ulog_getutxent 3
|
||||
.Sh HISTORY
|
||||
These functions appeared in
|
||||
.Fx 9.0 .
|
49
lib/libulog/ulog_util.c
Normal file
49
lib/libulog/ulog_util.c
Normal file
@ -0,0 +1,49 @@
|
||||
/*-
|
||||
* Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
|
||||
* 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.
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <string.h>
|
||||
#include <ttyent.h>
|
||||
|
||||
#include "ulog_internal.h"
|
||||
|
||||
unsigned int
|
||||
ulog_ttyslot(const char *name)
|
||||
{
|
||||
struct ttyent *ty;
|
||||
unsigned int slot;
|
||||
|
||||
setttyent();
|
||||
for (slot = 1; (ty = getttyent()) != NULL; ++slot)
|
||||
if (strcmp(ty->ty_name, name) == 0) {
|
||||
endttyent();
|
||||
return (slot);
|
||||
}
|
||||
endttyent();
|
||||
return (0);
|
||||
}
|
Loading…
Reference in New Issue
Block a user