| /* |
| * Copyright (c) 2000 Andre Lucas. 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. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by Markus Friedl. |
| * 4. 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. |
| */ |
| |
| /** |
| ** loginrec.c: platform-independent login recording and lastlog retrieval |
| **/ |
| |
| /** |
| ** TODO: |
| ** sockaddr_* stuff isn't finished |
| ** |
| ** Platform status: |
| ** ---------------- |
| ** |
| ** Known good: |
| ** Linux (Redhat 6.2, need more variants) |
| ** HP-UX 10.20 (gcc only) |
| ** |
| ** Testing required: Please send reports! |
| ** Solaris |
| ** IRIX |
| ** NetBSD |
| ** HP-UX 11 |
| ** AIX |
| ** |
| ** Platforms with known problems: |
| ** NeXT |
| ** |
| **/ |
| |
| #include "includes.h" |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <netinet/in.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <errno.h> |
| #ifdef HAVE_PWD_H |
| # include <pwd.h> |
| #endif |
| #ifdef HAVE_SYS_TIME_H |
| # include <sys/time.h> |
| #else |
| # include <time.h> |
| #endif |
| |
| #include "ssh.h" |
| #include "xmalloc.h" |
| #include "loginrec.h" |
| |
| RCSID("$Id: loginrec.c,v 1.2 2000/06/03 16:18:19 andre Exp $"); |
| |
| |
| /** |
| ** prototypes for helper functions in this file |
| **/ |
| |
| #if HAVE_UTMP_H |
| # include <utmp.h> |
| void set_utmp_time(struct logininfo *li, struct utmp *ut); |
| void construct_utmp(struct logininfo *li, struct utmp *ut); |
| #endif |
| |
| #ifdef HAVE_UTMPX_H |
| # include <utmpx.h> |
| void set_utmpx_time(struct logininfo *li, struct utmpx *ut); |
| void construct_utmpx(struct logininfo *li, struct utmpx *ut); |
| #endif |
| |
| int utmp_write_entry(struct logininfo *li); |
| int utmpx_write_entry(struct logininfo *li); |
| int wtmp_write_entry(struct logininfo *li); |
| int wtmpx_write_entry(struct logininfo *li); |
| int lastlog_write_entry(struct logininfo *li); |
| int syslogin_write_entry(struct logininfo *li); |
| |
| int getlast_entry(struct logininfo *li); |
| int lastlog_get_entry(struct logininfo *li); |
| int wtmp_get_entry(struct logininfo *li); |
| int wtmpx_get_entry(struct logininfo *li); |
| |
| |
| /** |
| ** platform-independent login functions |
| **/ |
| |
| /* login_alloc_entry() - allocate and initialise a logininfo */ |
| struct logininfo *login_alloc_entry(int pid, const char *username, |
| const char *hostname, |
| const char *line) { |
| struct logininfo *newli; |
| |
| newli = (struct logininfo *) xmalloc (sizeof(struct logininfo)); |
| |
| if (login_init_entry(newli, pid, username, hostname, line)) |
| return newli; |
| else |
| return 0; /* fail */ |
| } /* login_alloc_entry() */ |
| |
| |
| /* login_free_entry() - free struct memory (duh) */ |
| void login_free_entry(struct logininfo *li) { |
| if (li && (li->line[0] != '\0')) |
| free ((void *)li); |
| else |
| log("login_free_entry: attempt to free invalid entry (warning)"); |
| } /* login_free_entry() */ |
| |
| /* login_init_entry() - initialise a struct logininfo */ |
| int login_init_entry(struct logininfo *li, |
| int pid, const char *username, |
| const char *hostname, const char *line) { |
| |
| /* zero the structure */ |
| memset(li, 0, sizeof(struct logininfo)); |
| |
| /* progname should be set outside this call */ |
| /* type stays null by default */ |
| login_set_pid(li, pid); |
| /* set the line information */ |
| login_set_line(li, line); |
| login_set_username(li, username); |
| login_set_hostname(li, hostname); |
| /* exit status and termination stay null by default */ |
| login_set_current_time(li); |
| /* sockaddr_* stuff must be set separately (for now) */ |
| return 1; |
| } /* login_init_entry() */ |
| |
| |
| void |
| login_set_progname(struct logininfo *li, const char *progname) { |
| memset(li->progname, '\0', sizeof(li->progname)); |
| if (progname) |
| strlcpy(li->progname, progname, sizeof(li->progname)); |
| else |
| li->progname[0] = '\0'; /* set to null */ |
| } |
| |
| void |
| login_set_type(struct logininfo *li, int type) { |
| li->type = type; |
| } |
| |
| void |
| login_set_pid(struct logininfo *li, int pid) { |
| if (!pid) |
| li->pid = (int)getpid(); |
| else |
| li->pid = pid; |
| } |
| |
| void |
| login_set_uid(struct logininfo *li, int uid) { |
| struct passwd *pw; |
| |
| li->uid = uid; |
| /* now update the username */ |
| pw = getpwuid(uid); |
| strlcpy(li->username, pw->pw_name, sizeof(li->username)); |
| } |
| |
| void |
| login_set_line(struct logininfo *li, const char *line) { |
| if (line) { |
| /* canonical form is the full name, i.e. including '/dev' */ |
| line_fullname(li->line, line, sizeof(li->line)); |
| } else |
| li->line[0] = '\0'; |
| } |
| |
| void |
| login_set_username(struct logininfo *li, const char *username) { |
| struct passwd *pw; |
| |
| if (!username) { |
| li->username[0] = '\0'; |
| li->uid = -1; /* hmm... */ |
| } else { |
| strlcpy(li->username, username, sizeof(li->username)); |
| /* now update the uid */ |
| pw = getpwnam(username); |
| li->uid = pw->pw_uid; |
| } |
| } |
| |
| |
| void |
| login_set_hostname(struct logininfo *li, const char *hostname) { |
| if (hostname) { /* can be null */ |
| strlcpy(li->hostname, hostname, sizeof(li->hostname)); |
| } |
| } |
| |
| |
| void |
| login_set_exitstatus(struct logininfo *li, |
| int exit, int termination) { |
| /* FIXME: (ATL) And? */ |
| } |
| |
| |
| /* tv_usec should be null on systems without struct timeval */ |
| void |
| login_set_time(struct logininfo *li, |
| unsigned int tv_sec, unsigned int tv_usec) { |
| li->tv_sec = tv_sec; |
| li->tv_usec = tv_usec; |
| } |
| |
| |
| void |
| login_set_current_time(struct logininfo *li) { |
| #ifdef HAVE_SYS_TIME_H |
| struct timeval tv; |
| |
| gettimeofday(&tv, NULL); |
| li->tv_sec = tv.tv_sec ; li->tv_usec = tv.tv_usec; |
| #else |
| time_t t = time(0); |
| |
| li->tv_sec = t; li->tv_usec = 0; |
| #endif |
| } |
| |
| void |
| login_set_ip4(struct logininfo *li, |
| const struct sockaddr_in *sa_in4) { |
| memcpy((void *)&(li->hostaddr.sa_in4), (const void *)sa_in4, |
| sizeof(struct sockaddr_in)); |
| } |
| |
| #ifdef HAVE_IP6 |
| void |
| login_set_ip6(struct logininfo *li, |
| const struct sockaddr_in6 *sa_in6) { |
| memcpy((void *)&(li->hostaddr.sa_in4), (const void *)sa_in6, |
| sizeof(struct sockaddr_in6)); |
| } |
| #endif |
| |
| /* |
| * record the entry |
| */ |
| |
| int |
| login_write (struct logininfo *li) { |
| |
| if ((int)geteuid() != 0) { |
| log("Attempt to write login records by non-root user (aborting)"); |
| return 1; |
| } |
| /* set the timestamp */ |
| login_set_current_time(li); |
| #ifdef USE_LOGIN |
| syslogin_write_entry(li); |
| #endif |
| #ifdef USE_LASTLOG |
| if (li->type == LTYPE_LOGIN) { |
| lastlog_write_entry(li); |
| } |
| #endif |
| #ifdef USE_UTMP |
| utmp_write_entry(li); |
| #endif |
| #ifdef USE_WTMP |
| wtmp_write_entry(li); |
| #endif |
| #ifdef USE_UTMPX |
| utmpx_write_entry(li); |
| #endif |
| #ifdef USE_WTMPX |
| wtmpx_write_entry(li); |
| #endif |
| return 0; |
| } |
| |
| int |
| login_login (struct logininfo *li) { |
| li->type = LTYPE_LOGIN; |
| return login_write(li); |
| } |
| |
| int |
| login_logout(struct logininfo *li) { |
| li->type = LTYPE_LOGOUT; |
| return login_write(li); |
| } |
| |
| int |
| login_log_entry(struct logininfo *li) { |
| return login_write(li); |
| } |
| |
| |
| unsigned int |
| login_getlasttime_name(const char *username) { |
| struct logininfo li; |
| |
| memset(&li, '\0', sizeof(li)); |
| login_set_username(&li, username); |
| if (getlast_entry(&li)) |
| return li.tv_sec; |
| else |
| return 0; |
| } /* login_getlasttime_name() */ |
| |
| |
| unsigned int |
| login_getlasttime_uid(const int uid) { |
| struct logininfo li; |
| |
| memset(&li, '\0', sizeof(li)); |
| login_set_uid(&li, uid); |
| if (getlast_entry(&li)) |
| return li.tv_sec; |
| else |
| return 0; |
| } /* login_getlasttime_uid() */ |
| |
| |
| struct logininfo * |
| login_getlastentry_name(struct logininfo *li, |
| const char *username) { |
| login_set_username(li, username); |
| if (getlast_entry(li)) |
| return li; |
| else |
| return 0; |
| } /* login_getlastentry_name() */ |
| |
| struct logininfo * |
| login_getlastentry_uid(struct logininfo *li, |
| const int uid) { |
| login_set_uid(li, uid); |
| if (getlast_entry(li)) |
| return li; |
| else |
| return 0; |
| } /* login_getlastentry_uid() */ |
| |
| |
| /** |
| ** 'line' string utility functions |
| **/ |
| |
| /* |
| * process the 'line' string into three forms: |
| * 1. The full filename (including '/dev') |
| * 2. The stripped name (excluding '/dev') |
| * 3. The abbreviated name (e.g. /dev/ttyp00 |
| * |
| * Form 3 is used on some systems to identify a .tmp.? entry when |
| * attempting to remove it. Typically both addition and removal is |
| * performed by one application - say, sshd - so as long as the |
| * choice uniquely identifies a terminal and is the same at login and |
| * logout time, we're in good shape. |
| * |
| * NOTE: None of these calls actually allocate any memory - |
| * since their target is probably a structure, they don't |
| * need to. |
| */ |
| |
| |
| /* add the leading '/dev/' if it doesn't exist |
| * make sure dst has enough space, if not just copy src (ugh) */ |
| char * |
| line_fullname(char *dst, const char *src, int dstsize) { |
| memset(dst, '\0', dstsize); |
| if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) |
| strlcpy(dst, src, dstsize); |
| else { |
| strlcpy(dst, "/dev/", 5); |
| strlcat(dst, src, dstsize); |
| } |
| return dst; |
| } |
| |
| /* strip the leading '/dev' if it exists, return dst */ |
| char * |
| line_stripname(char *dst, const char *src, int dstsize) { |
| memset(dst, '\0', dstsize); |
| if (strncmp(src, "/dev/", 5) == 0) |
| strlcpy(dst, &src[5], dstsize); |
| else |
| strlcpy(dst, src, dstsize); |
| return dst; |
| } /* stripdev() */ |
| |
| /* return the abbreviated (usually four-character) form * |
| * simple algorithm for making name: |
| * - first character is 'L' (arbitrary - 'lib(L)ogin' :-) ) |
| * - remaining n characters are last n characters of line |
| * This is good for up to 999 ptys, I hope that's enough... |
| */ |
| char * |
| line_abbrevname(char *dst, const char *src, int dstsize) { |
| memset(dst, '\0', dstsize); |
| dst[0]='L'; |
| strlcpy(dst+1, &src[strlen(src)-(dstsize)], dstsize); |
| return dst; |
| } |
| |
| |
| /** |
| ** utmp utility functions |
| **/ |
| |
| #if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) |
| |
| #ifdef HAVE_UTMP_H |
| # include <utmp.h> |
| #endif |
| #ifdef USE_TIMEVAL |
| # include <sys/time.h> |
| #else |
| # include <time.h> |
| #endif |
| |
| /* build the utmp structure */ |
| void |
| set_utmp_time(struct logininfo *li, struct utmp *ut) { |
| #ifdef HAVE_TV_IN_UTMP |
| ut->ut_tv.tv_sec = li->tv_sec; |
| ut->ut_tv.tv_usec = li->tv_usec; |
| #else |
| # ifdef HAVE_TIME_IN_UTMP |
| ut->ut_time = li->tv_sec; |
| # endif |
| #endif |
| } |
| |
| void |
| construct_utmp(struct logininfo *li, |
| struct utmp *ut) { |
| memset(ut, '\0', sizeof(struct utmp)); |
| |
| #ifdef HAVE_ID_IN_UTMP |
| line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); |
| #endif |
| |
| #ifdef HAVE_TYPE_IN_UTMP |
| /* this is done here to keep utmp constants out of login.h */ |
| switch (li->type) { |
| case LTYPE_LOGIN: |
| ut->ut_type = USER_PROCESS; |
| break; |
| case LTYPE_LOGOUT: |
| ut->ut_type = DEAD_PROCESS; |
| break; |
| } |
| #endif |
| |
| #ifdef HAVE_PID_IN_UTMP |
| ut->ut_pid = li->pid; |
| #endif |
| line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); |
| strlcpy(ut->ut_name, li->username, sizeof(ut->ut_name)); |
| set_utmp_time(li, ut); |
| #ifdef HAVE_HOST_IN_UTMP |
| strlcpy(ut->ut_host, li->hostname, sizeof(ut->ut_host)); |
| #endif |
| #ifdef HAVE_ADDR_IN_UTMP |
| /* !!! not supported yet (can't see its big use either) */ |
| #endif |
| |
| } /* construct_utmp() */ |
| |
| #endif |
| /* USE_UTMP || USE_WTMP || USE_LOGIN */ |
| |
| /** |
| ** utmpx utility functions |
| **/ |
| |
| #if defined(USE_UTMPX) || defined (USE_WTMPX) |
| |
| #ifdef HAVE_UTMPX_H |
| # include <utmpx.h> |
| #endif |
| #ifdef USE_TIMEVAL |
| # include <sys/time.h> |
| #else |
| # include <time.h> |
| #endif |
| |
| /* build the utmpx structure */ |
| void |
| set_utmpx_time(struct logininfo *li, struct utmpx *utx) { |
| #ifdef HAVE_TV_IN_UTMPX |
| utx->ut_tv.tv_sec = li->tv_sec; |
| utx->ut_tv.tv_usec = li->tv_usec; |
| #else |
| # ifdef HAVE_TIME_IN_UTMPX |
| utx->ut_time = li->tv_sec; |
| # endif |
| #endif |
| } |
| |
| void |
| construct_utmpx(struct logininfo *li, |
| struct utmpx *utx) { |
| memset(utx, '\0', sizeof(struct utmpx)); |
| |
| line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); |
| |
| /* this is done here to keep utmp constants out of loginrec.h */ |
| switch (li->type) { |
| case LTYPE_LOGIN: |
| utx->ut_type = USER_PROCESS; |
| break; |
| case LTYPE_LOGOUT: |
| utx->ut_type = DEAD_PROCESS; |
| break; |
| } |
| |
| utx->ut_pid = li->pid; |
| line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); |
| strlcpy(utx->ut_name, li->username, sizeof(utx->ut_name)); |
| set_utmpx_time(li, utx); |
| #ifdef HAVE_HOST_IN_UTMPX |
| strlcpy(utx->ut_host, li->hostname, sizeof(utx->ut_host)); |
| #endif |
| #ifdef HAVE_ADDR_IN_UTMPX |
| /* !!! not supported yet (some issues with types of addresses) */ |
| #endif |
| #ifdef HAVE_SYSLEN_IN_UTMPX |
| /* this is safe because of the extra nulls in logininfo */ |
| utx->ut_syslen = strlen(li->hostname); |
| #endif |
| } /* construct_utmpx() */ |
| |
| #endif |
| /* USE_UTMPX || USE_WTMPX */ |
| |
| |
| |
| /** |
| ** utmp functions |
| **/ |
| |
| /* FIXME: (ATL) utmp_write_direct needs testing */ |
| |
| #ifdef USE_UTMP |
| |
| #include <utmp.h> |
| |
| /* if we can, use pututline() etc. */ |
| #if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ |
| defined(HAVE_PUTUTLINE) |
| # define UTMP_USE_LIBRARY |
| #endif |
| |
| |
| /* write a utmp entry with the system's help (pututline() and pals) */ |
| #ifdef UTMP_USE_LIBRARY |
| static int |
| utmp_write_library(struct logininfo *li, struct utmp *ut) { |
| |
| setutent(); |
| pututline(ut); |
| |
| #ifdef HAVE_ENDUTENT |
| endutent(); |
| #endif |
| return 1; |
| } /* utmp_write_library() */ |
| |
| #else |
| |
| /* write a utmp entry direct to the file */ |
| /* This code is a slightly modification of code in OpenBSD's login.c |
| * (in libutil) and so is subject to the OpenBSD Licensing terms. */ |
| static int |
| utmp_write_direct(struct logininfo *li, struct utmp *ut) { |
| struct utmp old_ut; |
| register int fd; |
| int tty; |
| |
| tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ |
| |
| if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { |
| (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET); |
| /* |
| * Prevent luser from zero'ing out ut_host. |
| * If the new ut_line is empty but the old one is not |
| * and ut_line and ut_name match, preserve the old ut_line. |
| */ |
| if ( read(fd, &old_ut, sizeof(struct utmp)) == sizeof(struct utmp) |
| && ut->ut_host[0] == '\0' |
| && old_ut.ut_host[0] != '\0' |
| && strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0 |
| && strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0 ) |
| (void)memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); |
| |
| (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET); |
| if (write(fd, ut, sizeof(struct utmp))==-1) |
| log("utmp_write_direct: error writing %s: %s", |
| UTMP_FILE, strerror(errno)); |
| |
| (void)close(fd); |
| return 1; |
| } else |
| return 0; |
| } /* utmp_write_direct() */ |
| |
| #endif /* UTMP_USE_LIBRARY */ |
| |
| |
| static int |
| utmp_perform_login(struct logininfo *li) { |
| struct utmp ut; |
| |
| construct_utmp(li, &ut); |
| |
| #ifdef UTMP_USE_LIBRARY |
| if (!utmp_write_library(li, &ut)) { |
| log("utmp_perform_login: utmp_write_library() failed"); |
| return 0; |
| } |
| #else |
| if (!utmp_write_direct(li, &ut)) { |
| log("utmp_perform_login: utmp_write_direct() failed"); |
| return 0; |
| } |
| #endif |
| return 1; |
| } /* utmp_perform_login() */ |
| |
| |
| static int |
| utmp_perform_logout(struct logininfo *li) { |
| struct utmp ut; |
| |
| memset(&ut, '\0', sizeof(ut)); |
| set_utmp_time(li, &ut); |
| line_stripname(ut.ut_line, li->line, sizeof(ut.ut_line)); |
| #ifdef HAVE_ID_IN_UTMP |
| line_abbrevname(ut.ut_id, li->line, sizeof(ut.ut_id)); |
| #endif |
| #ifdef HAVE_TYPE_IN_UTMP |
| ut.ut_type = DEAD_PROCESS; |
| #endif |
| |
| #if !defined(DISABLE_PUTUTLINE) \ |
| && defined(HAVE_SETUTENT) && defined(HAVE_PUTUTLINE) |
| utmp_write_library(li, &ut); |
| #else |
| utmp_write_direct(li, &ut); |
| #endif |
| |
| return 1; |
| } /* utmp_perform_logout() */ |
| |
| |
| int |
| utmp_write_entry(struct logininfo *li) { |
| |
| switch(li->type) { |
| case LTYPE_LOGIN: |
| return utmp_perform_login(li); |
| |
| case LTYPE_LOGOUT: |
| return utmp_perform_logout(li); |
| |
| default: |
| log("utmp_write_entry: invalid type field"); |
| return 0; |
| } |
| } /* utmp_write_entry() */ |
| |
| |
| #endif |
| /* USE_UTMP */ |
| |
| |
| /** |
| ** utmpx functions |
| **/ |
| |
| /* not much point if we don't want utmpx entries */ |
| #ifdef USE_UTMPX |
| |
| #include <utmpx.h> |
| |
| /* if we have the wherewithall, use pututxline etc. */ |
| #if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) \ |
| && defined(HAVE_PUTUTXLINE) |
| # define UTMPX_USE_LIBRARY |
| #endif |
| |
| |
| /* write a utmpx entry with the system's help (pututxline() and pals) */ |
| #ifdef UTMPX_USE_LIBRARY |
| static int |
| utmpx_write_library(struct logininfo *li, struct utmpx *utx) { |
| |
| setutxent(); |
| pututxline(utx); |
| |
| #ifdef HAVE_ENDUTXENT |
| endutxent(); |
| #endif |
| return 1; |
| } /* utmpx_write_library() */ |
| |
| #else |
| /* UTMPX_USE_LIBRARY */ |
| |
| |
| /* write a utmp entry direct to the file */ |
| static int |
| utmpx_write_direct(struct logininfo *li, struct utmpx *utx) { |
| |
| log("utmpx_write_direct: not implemented!"); |
| return 0; |
| } /* utmpx_write_direct() */ |
| |
| #endif |
| /* UTMPX_USE_LIBRARY */ |
| |
| static int |
| utmpx_perform_login(struct logininfo *li) { |
| struct utmpx utx; |
| |
| construct_utmpx(li, &utx); |
| |
| #ifdef UTMPX_USE_LIBRARY |
| if (!utmpx_write_library(li, &utx)) { |
| log("utmpx_perform_login: utmp_write_library() failed"); |
| return 0; |
| } |
| #else |
| if (!utmpx_write_direct(li, &ut)) { |
| log("utmpx_perform_login: utmp_write_direct() failed"); |
| return 0; |
| } |
| #endif |
| return 1; |
| } /* utmpx_perform_login() */ |
| |
| |
| static int |
| utmpx_perform_logout(struct logininfo *li) { |
| struct utmpx utx; |
| |
| memset(&utx, '\0', sizeof(utx)); |
| set_utmpx_time(li, &utx); |
| line_stripname(utx.ut_line, li->line, sizeof(utx.ut_line)); |
| #ifdef HAVE_ID_IN_UTMPX |
| line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); |
| #endif |
| #ifdef HAVE_TYPE_IN_UTMPX |
| utx.ut_type = DEAD_PROCESS; |
| #endif |
| |
| #ifdef UTMPX_USE_LIBRARY |
| utmpx_write_library(li, &utx); |
| #else |
| utmpx_write_direct(li, &utx); |
| #endif |
| |
| return 1; |
| } /* utmpx_perform_logout() */ |
| |
| |
| int |
| utmpx_write_entry(struct logininfo *li) { |
| |
| switch(li->type) { |
| case LTYPE_LOGIN: |
| return utmpx_perform_login(li); |
| case LTYPE_LOGOUT: |
| return utmpx_perform_logout(li); |
| default: |
| log("utmpx_write_entry: invalid type field"); |
| return 0; |
| } |
| } /* utmpx_write_entry() */ |
| |
| |
| #endif |
| /* USE_UTMPX */ |
| |
| |
| /** |
| ** wtmp functions |
| **/ |
| |
| #ifdef USE_WTMP |
| |
| # include <utmp.h> |
| |
| /* write a wtmp entry direct to the end of the file */ |
| /* This code is a slight modification of code in OpenBSD's logwtmp.c |
| * (in libutil) and so is subject to the OpenBSD licensing terms */ |
| static int |
| wtmp_write(struct logininfo *li, struct utmp *ut) { |
| struct stat buf; |
| int fd, ret = 1; |
| |
| if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { |
| log("wtmp_write: problem writing %s: %s", |
| WTMP_FILE, strerror(errno)); |
| return 0; |
| } |
| |
| if (fstat(fd, &buf) == 0) |
| if (write(fd, (char *)ut, sizeof(struct utmp)) != |
| sizeof(struct utmp)) { |
| ftruncate(fd, buf.st_size); |
| log("wtmp_write: problem writing %s: %s", |
| WTMP_FILE, strerror(errno)); |
| ret = 0; |
| } |
| (void)close(fd); |
| |
| return ret; |
| } /* wtmp_write() */ |
| |
| |
| |
| static int |
| wtmp_perform_login(struct logininfo *li) { |
| struct utmp ut; |
| |
| construct_utmp(li, &ut); |
| return wtmp_write(li, &ut); |
| } /* wtmp_perform_login() */ |
| |
| |
| static int |
| wtmp_perform_logout(struct logininfo *li) { |
| struct utmp ut; |
| |
| construct_utmp(li, &ut); |
| /* blank out unnecessary fields */ |
| memset(&(ut.ut_name), '\0', sizeof(ut.ut_name)); |
| #ifdef HAVE_ID_IN_UTMP |
| memset(&(ut.ut_id), '\0', sizeof(ut.ut_id)); |
| #endif |
| #ifdef HAVE_HOST_IN_UTMP |
| memset(&(ut.ut_host), '\0', sizeof(ut.ut_host)); |
| #endif |
| #ifdef HAVE_ADDR_IN_UTMP |
| memset(&(ut.ut_addr), '\0', sizeof(ut.ut_addr)); |
| #endif |
| return wtmp_write(li, &ut); |
| } /* wtmp_perform_logout() */ |
| |
| |
| int |
| wtmp_write_entry(struct logininfo *li) { |
| |
| switch(li->type) { |
| case LTYPE_LOGIN: |
| return wtmp_perform_login(li); |
| case LTYPE_LOGOUT: |
| return wtmp_perform_logout(li); |
| default: |
| log("wtmp_write_entry: invalid type field"); |
| return 0; |
| } |
| } /* wtmp_write_entry() */ |
| |
| |
| |
| int |
| wtmp_get_entry(struct logininfo *li) { |
| struct stat st; |
| struct utmp ut; |
| int fd; |
| |
| if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { |
| log("wtmp_get_entry: problem opening %s: %s", |
| WTMP_FILE, strerror(errno)); |
| return 0; |
| } |
| |
| if (fstat(fd, &st) != 0) { |
| log("wtmp_get_entry: couldn't stat %s: %s", |
| WTMP_FILE, strerror(errno)); |
| close(fd); |
| return 0; |
| } |
| |
| (void)lseek(fd, (off_t)(0-sizeof(struct utmp)), SEEK_END); |
| |
| do { |
| if (read(fd, &ut, sizeof(ut)) != sizeof(ut)) { |
| log("wtmp_get_entry: read of %s failed: %s", |
| WTMP_FILE, strerror(errno)); |
| close (fd); |
| return 0; |
| } |
| |
| /* Logouts are recorded as a blank username on a particular line. |
| * So, we just need to find the username in struct utmp */ |
| if ( strncmp(li->username, ut.ut_user, 8) == 0 ) { |
| /* note we've already made sure there's a time in struct utmp */ |
| #ifdef HAVE_TIME_IN_UTMP |
| li->tv_sec = ut.ut_time; |
| #else |
| # if HAVE_TV_IN_UTMP |
| li->tv_sec = ut.ut_tv.tv_sec; |
| # endif |
| #endif |
| line_fullname(li->line, ut.ut_line, sizeof(ut.ut_line)); |
| #ifdef HAVE_HOST_IN_UTMP |
| strlcpy(li->hostname, ut.ut_host, sizeof(ut.ut_host)); |
| #endif |
| } |
| if (lseek(fd, (off_t)(0-2*sizeof(struct utmp)), SEEK_CUR) == -1) { |
| close (fd); |
| return 0; |
| } |
| } while (li->tv_sec == 0); |
| |
| return 1; |
| } /* wtmp_get_entry() */ |
| |
| |
| #endif |
| /* USE_WTMP */ |
| |
| |
| /** |
| ** wtmpx functions |
| **/ |
| |
| #ifdef USE_WTMPX |
| |
| # include <utmpx.h> |
| |
| /* write a wtmpx entry direct to the end of the file */ |
| /* This code is a slight modification of code in OpenBSD's logwtmp.c |
| * (in libutil) and so is subject to the OpenBSD licensing terms */ |
| static int |
| wtmpx_write(struct logininfo *li, struct utmpx *utx) { |
| struct stat buf; |
| int fd, ret = 1; |
| |
| if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { |
| log("wtmpx_write: problem opening %s: %s", |
| WTMPX_FILE, strerror(errno)); |
| return 0; |
| } |
| |
| if (fstat(fd, &buf) == 0) |
| if (write(fd, (char *)utx, sizeof(struct utmpx)) != |
| sizeof(struct utmpx)) { |
| ftruncate(fd, buf.st_size); |
| log("wtmpx_write: problem writing %s: %s", |
| WTMPX_FILE, strerror(errno)); |
| ret = 0; |
| } |
| (void)close(fd); |
| |
| return ret; |
| } /* wtmpx_write() */ |
| |
| |
| |
| static int |
| wtmpx_perform_login(struct logininfo *li) { |
| struct utmpx utx; |
| |
| construct_utmpx(li, &utx); |
| return wtmpx_write(li, &utx); |
| } /* wtmpx_perform_login() */ |
| |
| |
| static int |
| wtmpx_perform_logout(struct logininfo *li) { |
| struct utmpx utx; |
| |
| construct_utmpx(li, &utx); |
| /* blank out unnecessary fields */ |
| memset(&(utx.ut_name), '\0', sizeof(utx.ut_name)); |
| #ifdef HAVE_ID_IN_UTMPX |
| memset(&(utx.ut_id), '\0', sizeof(utx.ut_id)); |
| #endif |
| #ifdef HAVE_HOST_IN_UTMPX |
| memset(&(utx.ut_host), '\0', sizeof(utx.ut_host)); |
| #endif |
| #ifdef HAVE_ADDR_IN_UTMPX |
| memset(&(utx.ut_addr), '\0', sizeof(utx.ut_addr)); |
| #endif |
| return wtmpx_write(li, &utx); |
| |
| } /* wtmpx_perform_logout() */ |
| |
| |
| int |
| wtmpx_write_entry(struct logininfo *li) { |
| |
| switch(li->type) { |
| case LTYPE_LOGIN: |
| return wtmpx_perform_login(li); |
| case LTYPE_LOGOUT: |
| return wtmpx_perform_logout(li); |
| default: |
| log("wtmpx_write_entry: invalid type field"); |
| return 0; |
| } |
| } /* wtmpx_write_entry() */ |
| |
| |
| |
| int |
| wtmpx_get_entry(struct logininfo *li) { |
| struct stat st; |
| struct utmpx utx; |
| int fd; |
| |
| if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { |
| log("wtmpx_get_entry: problem opening %s: %s", |
| WTMPX_FILE, strerror(errno)); |
| return 0; |
| } |
| |
| if (fstat(fd, &st) != 0) { |
| log("wtmpx_get_entry: couldn't stat %s: %s", |
| WTMP_FILE, strerror(errno)); |
| close(fd); |
| return 0; |
| } |
| |
| (void)lseek(fd, (off_t)(0-sizeof(struct utmpx)), SEEK_END); |
| |
| do { |
| if (read(fd, &utx, sizeof(utx)) != sizeof(utx)) { |
| log("wtmpx_get_entry: read of %s failed: %s", |
| WTMPX_FILE, strerror(errno)); |
| close (fd); |
| return 0; |
| } |
| |
| /* Logouts are recorded as a blank username on a particular line. |
| * So, we just need to find the username in struct utmpx */ |
| if ( strncmp(li->username, utx.ut_user, 8) == 0 ) { |
| /* note we've already made sure there's a time in struct utmp */ |
| #ifdef HAVE_TV_IN_UTMPX |
| li->tv_sec = utx.ut_tv.tv_sec; |
| #else |
| # ifdef HAVE_TIME_IN_UTMPX |
| li->tv_sec = utx.ut_time; |
| # endif |
| #endif |
| line_fullname(li->line, utx.ut_line, sizeof(utx.ut_line)); |
| #ifdef HAVE_HOST_IN_UTMPX |
| strlcpy(li->hostname, utx.ut_host, sizeof(utx.ut_line)); |
| #endif |
| } |
| if (lseek(fd, (off_t)(0-2*sizeof(struct utmpx)), SEEK_CUR) == -1) { |
| close (fd); |
| return 0; |
| } |
| } while (li->tv_sec == 0); |
| return 1; |
| } /* wtmpx_get_entry() */ |
| |
| |
| |
| #endif |
| /* USE_WTMPX */ |
| |
| |
| |
| /** |
| ** libutil login() functions |
| **/ |
| |
| #ifdef USE_LOGIN |
| |
| #ifdef HAVE_UTMP_H |
| # include <utmp.h> |
| #endif |
| #ifdef HAVE_UTIL_H |
| # include <util.h> |
| #endif |
| #ifdef USE_TIMEVAL |
| # include <sys/time.h> |
| #else |
| # include <time.h> |
| #endif |
| |
| static int |
| syslogin_perform_login(struct logininfo *li) { |
| struct utmp *ut; |
| |
| if (! (ut = (struct utmp *)malloc(sizeof(struct utmp)))) { |
| log("syslogin_perform_login: couldn't malloc()"); |
| return 0; |
| } |
| construct_utmp(li, ut); |
| login(ut); |
| |
| return 1; |
| } /* syslogin_perform_login() */ |
| |
| static int |
| syslogin_perform_logout(struct logininfo *li) { |
| |
| #ifdef HAVE_LOGOUT |
| char line[8]; |
| |
| (void)line_stripname(line, li->line, sizeof(line)); |
| |
| if (!logout(line)) { |
| log("syslogin_perform_logout: logout() returned an error"); |
| # ifdef HAVE_LOGWTMP |
| } else { |
| logwtmp(line, "", ""); |
| } |
| # endif |
| /* TODO: what to do if we have login, but no logout? |
| * what if logout but no logwtmp? All routines are in libutil |
| * so they should all be there, but... */ |
| #endif |
| return 1; |
| } /* syslogin_perform_logout() */ |
| |
| |
| |
| int |
| syslogin_write_entry(struct logininfo *li) { |
| |
| switch (li->type) { |
| case LTYPE_LOGIN: |
| return syslogin_perform_login(li); |
| case LTYPE_LOGOUT: |
| return syslogin_perform_logout(li); |
| default: |
| log("syslogin_write_entry: Invalid type field"); |
| return 0; |
| } |
| } /* utmp_write_entry() */ |
| |
| |
| #endif |
| /* USE_LOGIN */ |
| |
| /* end of file log-syslogin.c */ |
| |
| |
| /** |
| ** lastlog functions |
| **/ |
| |
| #ifdef USE_LASTLOG |
| |
| #ifdef HAVE_LASTLOG_H |
| # include <lastlog.h> |
| #else |
| # if !defined(USE_UTMP) && !defined(USE_WTMP) |
| # include <utmp.h> |
| # endif |
| #endif |
| |
| |
| static void |
| lastlog_construct(struct logininfo *li, |
| struct lastlog *last) { |
| /* clear the structure */ |
| memset(last, '\0', sizeof(struct lastlog)); |
| |
| (void)line_stripname(last->ll_line, li->line, |
| sizeof(last->ll_line)); |
| strlcpy(last->ll_host, li->hostname, sizeof(last->ll_host)); |
| last->ll_time = li->tv_sec; |
| } /* lastlog_construct() */ |
| |
| |
| #define LL_FILE 1 |
| #define LL_DIR 2 |
| #define LL_OTHER 3 |
| |
| static int |
| lastlog_filetype(char *filename) { |
| struct stat st; |
| |
| if ( stat(LASTLOG_FILE, &st) != 0) { |
| log("lastlog_perform_login: Couldn't stat %s: %s", |
| LASTLOG_FILE, strerror(errno)); |
| return 0; |
| } |
| |
| if (S_ISDIR(st.st_mode)) |
| return LL_DIR; |
| else if (S_ISREG(st.st_mode)) |
| return LL_FILE; |
| else |
| return LL_OTHER; |
| } /* lastlog_filetype() */ |
| |
| |
| /* open the file (using filemode) and seek to the login entry */ |
| static int |
| lastlog_openseek(struct logininfo *li, int *fd, int filemode) { |
| |
| off_t offset; |
| int type; |
| char lastlog_file[1024]; |
| |
| type = lastlog_filetype(LASTLOG_FILE); |
| switch (type) { |
| case LL_FILE: |
| strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file)); |
| break; |
| case LL_DIR: |
| snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", |
| LASTLOG_FILE, li->username); |
| break; |
| default: |
| log("lastlog_openseek: %.100s is not a file or directory!", |
| LASTLOG_FILE); |
| return 0; |
| } /* switch */ |
| |
| *fd = open(lastlog_file, filemode); |
| if ( *fd < 0) { |
| log("lastlog_openseek: Couldn't open %s: %s", |
| lastlog_file, strerror(errno)); |
| return 0; |
| } |
| |
| /* find this uid's offset in the lastlog file */ |
| offset = (off_t) ( (long)li->uid * sizeof(struct lastlog)); |
| |
| if ( lseek(*fd, offset, SEEK_SET) != offset ) { |
| log("lastlog_openseek: %s->lseek(): %s", |
| lastlog_file, strerror(errno)); |
| return 0; |
| } |
| return 1; |
| } /* lastlog_openseek() */ |
| |
| static int |
| lastlog_perform_login(struct logininfo *li) { |
| struct lastlog last; |
| int fd; |
| |
| /* create our struct lastlog */ |
| lastlog_construct(li, &last); |
| |
| /* write the entry */ |
| if (lastlog_openseek(li, &fd, O_RDWR)) { |
| if ( write(fd, &last, sizeof(struct lastlog)) |
| != sizeof(struct lastlog) ) { |
| log("lastlog_write_filemode: Error writing to %s: %s", |
| LASTLOG_FILE, strerror(errno)); |
| return 0; |
| } |
| return 1; |
| } else |
| return 0; |
| } /* lastlog_perform_login() */ |
| |
| |
| int |
| lastlog_write_entry(struct logininfo *li) { |
| |
| switch(li->type) { |
| case LTYPE_LOGIN: |
| return lastlog_perform_login(li); |
| default: |
| log("lastlog_write_entry: Invalid type field"); |
| return 0; |
| } |
| } /* lastlog_write_entry() */ |
| |
| |
| |
| static void |
| lastlog_populate_entry(struct logininfo *li, |
| struct lastlog *last) { |
| line_fullname(li->line, last->ll_line, sizeof(li->line)); |
| strlcpy(li->hostname, last->ll_host, sizeof(li->hostname)); |
| li->tv_sec = last->ll_time; |
| } /* lastlog_populate_entry() */ |
| |
| |
| |
| int |
| lastlog_get_entry(struct logininfo *li) { |
| struct lastlog last; |
| int fd; |
| |
| if (lastlog_openseek(li, &fd, O_RDONLY)) { |
| if ( read(fd, &last, sizeof(struct lastlog)) |
| != sizeof(struct lastlog) ) { |
| log("lastlog_write_filemode: Error reading from %s: %s", |
| LASTLOG_FILE, strerror(errno)); |
| return 0; |
| } else { |
| lastlog_populate_entry(li, &last); |
| return 1; |
| } |
| |
| } else |
| return 0; |
| } /* lastlog_get_entry() */ |
| |
| |
| #endif |
| /* USE_LASTLOG */ |
| |
| |
| /** |
| ** lastlog retrieval functions |
| **/ |
| |
| /* take the uid in li and return the last login time */ |
| int |
| getlast_entry(struct logininfo *li) { |
| |
| #ifdef USE_LASTLOG |
| if (lastlog_get_entry(li)) |
| return 1; |
| else |
| return 0; |
| #else |
| /* !USE_LASTLOG */ |
| /* Try to retrieve the last login time from another source */ |
| |
| # if defined(USE_WTMP) && (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) |
| |
| /* retrieve last login time from utmp */ |
| if (wtmp_get_entry(li)) |
| return 1; |
| else |
| return 0; |
| |
| # else |
| # if defined(USE_WTMPX) && (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) |
| |
| /* retrieve last login time from utmpx */ |
| if (wtmpx_get_entry(li)) |
| return 1; |
| else |
| return 0; |
| |
| # else |
| |
| /* no means of retrieving last login time */ |
| return 0; |
| # endif |
| # endif |
| |
| #endif |
| /* USE_LASTLOG */ |
| |
| } |