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Diffstat (limited to '')
| -rw-r--r-- | libmisc/utmp.c | 474 |
1 files changed, 0 insertions, 474 deletions
diff --git a/libmisc/utmp.c b/libmisc/utmp.c deleted file mode 100644 index 45b479f..0000000 --- a/libmisc/utmp.c +++ /dev/null @@ -1,474 +0,0 @@ -/* - * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh - * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz - * SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko - * SPDX-FileCopyrightText: 2008 - 2009, Nicolas François - * - * SPDX-License-Identifier: BSD-3-Clause - */ - -#include <config.h> - -#include "defines.h" -#include "prototypes.h" - -#ifdef USE_UTMPX -#include <utmpx.h> -#else -#include <utmp.h> -#endif - -#include <assert.h> -#include <sys/param.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <netdb.h> -#include <stdio.h> - -#ident "$Id$" - - -/* - * is_my_tty -- determine if "tty" is the same TTY stdin is using - */ -static bool is_my_tty (const char *tty) -{ - /* full_tty shall be at least sizeof utmp.ut_line + 5 */ - char full_tty[200]; - /* tmptty shall be bigger than full_tty */ - static char tmptty[sizeof (full_tty)+1]; - - if ('/' != *tty) { - (void) snprintf (full_tty, sizeof full_tty, "/dev/%s", tty); - tty = &full_tty[0]; - } - - if ('\0' == tmptty[0]) { - const char *tname = ttyname (STDIN_FILENO); - if (NULL != tname) { - (void) strncpy (tmptty, tname, sizeof tmptty); - tmptty[sizeof (tmptty) - 1] = '\0'; - } - } - - if ('\0' == tmptty[0]) { - (void) puts (_("Unable to determine your tty name.")); - exit (EXIT_FAILURE); - } else if (strncmp (tty, tmptty, sizeof (tmptty)) != 0) { - return false; - } else { - return true; - } -} - -/* - * get_current_utmp - return the most probable utmp entry for the current - * session - * - * The utmp file is scanned for an entry with the same process ID. - * The line entered by the *getty / telnetd, etc. should also match - * the current terminal. - * - * When an entry is returned by get_current_utmp, and if the utmp - * structure has a ut_id field, this field should be used to update - * the entry information. - * - * Return NULL if no entries exist in utmp for the current process. - */ -#ifndef USE_UTMPX -/*@null@*/ /*@only@*/struct utmp *get_current_utmp (void) -{ - struct utmp *ut; - struct utmp *ret = NULL; - - setutent (); - - /* First, try to find a valid utmp entry for this process. */ - while ((ut = getutent ()) != NULL) { - if ( (ut->ut_pid == getpid ()) -#ifdef HAVE_STRUCT_UTMP_UT_ID - && ('\0' != ut->ut_id[0]) -#endif -#ifdef HAVE_STRUCT_UTMP_UT_TYPE - && ( (LOGIN_PROCESS == ut->ut_type) - || (USER_PROCESS == ut->ut_type)) -#endif - /* A process may have failed to close an entry - * Check if this entry refers to the current tty */ - && is_my_tty (ut->ut_line)) { - break; - } - } - - if (NULL != ut) { - ret = (struct utmp *) xmalloc (sizeof (*ret)); - memcpy (ret, ut, sizeof (*ret)); - } - - endutent (); - - return ret; -} -#else -/*@null@*/ /*@only*/struct utmpx *get_current_utmp(void) -{ - struct utmpx *ut; - struct utmpx *ret = NULL; - - setutxent (); - - /* Find the utmpx entry for this PID. */ - while ((ut = getutxent ()) != NULL) { - if ( (ut->ut_pid == getpid ()) - && ('\0' != ut->ut_id[0]) - && ( (LOGIN_PROCESS == ut->ut_type) - || (USER_PROCESS == ut->ut_type)) - && is_my_tty (ut->ut_line)) { - break; - } - } - - if (NULL != ut) { - ret = (struct utmpx *) xmalloc (sizeof (*ret)); - memcpy (ret, ut, sizeof (*ret)); - } - - endutxent (); - - return ret; -} -#endif - - -#ifndef USE_PAM -/* - * Some systems already have updwtmp() and possibly updwtmpx(). Others - * don't, so we re-implement these functions if necessary. - */ -#ifndef HAVE_UPDWTMP -static void updwtmp (const char *filename, const struct utmp *ut) -{ - int fd; - - fd = open (filename, O_APPEND | O_WRONLY, 0); - if (fd >= 0) { - write (fd, (const char *) ut, sizeof (*ut)); - close (fd); - } -} -#endif /* ! HAVE_UPDWTMP */ - -#ifdef USE_UTMPX -#ifndef HAVE_UPDWTMPX -static void updwtmpx (const char *filename, const struct utmpx *utx) -{ - int fd; - - fd = open (filename, O_APPEND | O_WRONLY, 0); - if (fd >= 0) { - write (fd, (const char *) utx, sizeof (*utx)); - close (fd); - } -} -#endif /* ! HAVE_UPDWTMPX */ -#endif /* ! USE_UTMPX */ -#endif /* ! USE_PAM */ - - -#ifndef USE_UTMPX -/* - * prepare_utmp - prepare an utmp entry so that it can be logged in a - * utmp/wtmp file. - * - * It accepts an utmp entry in input (ut) to return an entry with - * the right ut_id. This is typically an entry returned by - * get_current_utmp - * If ut is NULL, ut_id will be forged based on the line argument. - * - * The ut_host field of the input structure may also be kept, and is - * used to define the ut_addr/ut_addr_v6 fields. (if these fields - * exist) - * - * Other fields are discarded and filed with new values (if they - * exist). - * - * The returned structure shall be freed by the caller. - */ -/*@only@*/struct utmp *prepare_utmp (const char *name, - const char *line, - const char *host, - /*@null@*/const struct utmp *ut) -{ - struct timeval tv; - char *hostname = NULL; - struct utmp *utent; - - assert (NULL != name); - assert (NULL != line); - - - - if ( (NULL != host) - && ('\0' != host[0])) { - hostname = (char *) xmalloc (strlen (host) + 1); - strcpy (hostname, host); -#ifdef HAVE_STRUCT_UTMP_UT_HOST - } else if ( (NULL != ut) - && ('\0' != ut->ut_host[0])) { - hostname = (char *) xmalloc (sizeof (ut->ut_host) + 1); - strncpy (hostname, ut->ut_host, sizeof (ut->ut_host)); - hostname[sizeof (ut->ut_host)] = '\0'; -#endif /* HAVE_STRUCT_UTMP_UT_HOST */ - } - - if (strncmp(line, "/dev/", 5) == 0) { - line += 5; - } - - - utent = (struct utmp *) xmalloc (sizeof (*utent)); - memzero (utent, sizeof (*utent)); - - - -#ifdef HAVE_STRUCT_UTMP_UT_TYPE - utent->ut_type = USER_PROCESS; -#endif /* HAVE_STRUCT_UTMP_UT_TYPE */ - utent->ut_pid = getpid (); - strncpy (utent->ut_line, line, sizeof (utent->ut_line) - 1); -#ifdef HAVE_STRUCT_UTMP_UT_ID - if (NULL != ut) { - strncpy (utent->ut_id, ut->ut_id, sizeof (utent->ut_id)); - } else { - /* XXX - assumes /dev/tty?? */ - strncpy (utent->ut_id, line + 3, sizeof (utent->ut_id) - 1); - } -#endif /* HAVE_STRUCT_UTMP_UT_ID */ -#ifdef HAVE_STRUCT_UTMP_UT_NAME - strncpy (utent->ut_name, name, sizeof (utent->ut_name)); -#endif /* HAVE_STRUCT_UTMP_UT_NAME */ -#ifdef HAVE_STRUCT_UTMP_UT_USER - strncpy (utent->ut_user, name, sizeof (utent->ut_user) - 1); -#endif /* HAVE_STRUCT_UTMP_UT_USER */ - if (NULL != hostname) { - struct addrinfo *info = NULL; -#ifdef HAVE_STRUCT_UTMP_UT_HOST - strncpy (utent->ut_host, hostname, sizeof (utent->ut_host) - 1); -#endif /* HAVE_STRUCT_UTMP_UT_HOST */ -#ifdef HAVE_STRUCT_UTMP_UT_SYSLEN - utent->ut_syslen = MIN (strlen (hostname), - sizeof (utent->ut_host)); -#endif /* HAVE_STRUCT_UTMP_UT_SYSLEN */ -#if defined(HAVE_STRUCT_UTMP_UT_ADDR) || defined(HAVE_STRUCT_UTMP_UT_ADDR_V6) - if (getaddrinfo (hostname, NULL, NULL, &info) == 0) { - /* getaddrinfo might not be reliable. - * Just try to log what may be useful. - */ - if (info->ai_family == AF_INET) { - struct sockaddr_in *sa = - (struct sockaddr_in *) info->ai_addr; -#ifdef HAVE_STRUCT_UTMP_UT_ADDR - memcpy (&(utent->ut_addr), - &(sa->sin_addr), - MIN (sizeof (utent->ut_addr), - sizeof (sa->sin_addr))); -#endif /* HAVE_STRUCT_UTMP_UT_ADDR */ -#ifdef HAVE_STRUCT_UTMP_UT_ADDR_V6 - memcpy (utent->ut_addr_v6, - &(sa->sin_addr), - MIN (sizeof (utent->ut_addr_v6), - sizeof (sa->sin_addr))); - } else if (info->ai_family == AF_INET6) { - struct sockaddr_in6 *sa = - (struct sockaddr_in6 *) info->ai_addr; - memcpy (utent->ut_addr_v6, - &(sa->sin6_addr), - MIN (sizeof (utent->ut_addr_v6), - sizeof (sa->sin6_addr))); -#endif /* HAVE_STRUCT_UTMP_UT_ADDR_V6 */ - } - freeaddrinfo (info); - } -#endif /* HAVE_STRUCT_UTMP_UT_ADDR || HAVE_STRUCT_UTMP_UT_ADDR_V6 */ - free (hostname); - } - /* ut_exit is only for DEAD_PROCESS */ - utent->ut_session = getsid (0); - if (gettimeofday (&tv, NULL) == 0) { -#ifdef HAVE_STRUCT_UTMP_UT_TIME - utent->ut_time = tv.tv_sec; -#endif /* HAVE_STRUCT_UTMP_UT_TIME */ -#ifdef HAVE_STRUCT_UTMP_UT_XTIME - utent->ut_xtime = tv.tv_usec; -#endif /* HAVE_STRUCT_UTMP_UT_XTIME */ -#ifdef HAVE_STRUCT_UTMP_UT_TV - utent->ut_tv.tv_sec = tv.tv_sec; - utent->ut_tv.tv_usec = tv.tv_usec; -#endif /* HAVE_STRUCT_UTMP_UT_TV */ - } - - return utent; -} - -/* - * setutmp - Update an entry in utmp and log an entry in wtmp - * - * Return 1 on failure and 0 on success. - */ -int setutmp (struct utmp *ut) -{ - int err = 0; - - assert (NULL != ut); - - setutent (); - if (pututline (ut) == NULL) { - err = 1; - } - endutent (); - -#ifndef USE_PAM - /* This is done by pam_lastlog */ - updwtmp (_WTMP_FILE, ut); -#endif /* ! USE_PAM */ - - return err; -} - -#else -/* - * prepare_utmpx - the UTMPX version for prepare_utmp - */ -/*@only@*/struct utmpx *prepare_utmpx (const char *name, - const char *line, - const char *host, - /*@null@*/const struct utmpx *ut) -{ - struct timeval tv; - char *hostname = NULL; - struct utmpx *utxent; - - assert (NULL != name); - assert (NULL != line); - - - - if ( (NULL != host) - && ('\0' != host[0])) { - hostname = (char *) xmalloc (strlen (host) + 1); - strcpy (hostname, host); -#ifdef HAVE_STRUCT_UTMP_UT_HOST - } else if ( (NULL != ut) - && (NULL != ut->ut_host) - && ('\0' != ut->ut_host[0])) { - hostname = (char *) xmalloc (sizeof (ut->ut_host) + 1); - strncpy (hostname, ut->ut_host, sizeof (ut->ut_host)); - hostname[sizeof (ut->ut_host)] = '\0'; -#endif /* HAVE_STRUCT_UTMP_UT_TYPE */ - } - - if (strncmp(line, "/dev/", 5) == 0) { - line += 5; - } - - utxent = (struct utmpx *) xmalloc (sizeof (*utxent)); - memzero (utxent, sizeof (*utxent)); - - - - utxent->ut_type = USER_PROCESS; - utxent->ut_pid = getpid (); - strncpy (utxent->ut_line, line, sizeof (utxent->ut_line)); - /* existence of ut->ut_id is enforced by configure */ - if (NULL != ut) { - strncpy (utxent->ut_id, ut->ut_id, sizeof (utxent->ut_id)); - } else { - /* XXX - assumes /dev/tty?? */ - strncpy (utxent->ut_id, line + 3, sizeof (utxent->ut_id)); - } -#ifdef HAVE_STRUCT_UTMPX_UT_NAME - strncpy (utxent->ut_name, name, sizeof (utxent->ut_name)); -#endif /* HAVE_STRUCT_UTMPX_UT_NAME */ - strncpy (utxent->ut_user, name, sizeof (utxent->ut_user)); - if (NULL != hostname) { - struct addrinfo *info = NULL; -#ifdef HAVE_STRUCT_UTMPX_UT_HOST - strncpy (utxent->ut_host, hostname, sizeof (utxent->ut_host)); -#endif /* HAVE_STRUCT_UTMPX_UT_HOST */ -#ifdef HAVE_STRUCT_UTMPX_UT_SYSLEN - utxent->ut_syslen = MIN (strlen (hostname), - sizeof (utxent->ut_host)); -#endif /* HAVE_STRUCT_UTMPX_UT_SYSLEN */ -#if defined(HAVE_STRUCT_UTMPX_UT_ADDR) || defined(HAVE_STRUCT_UTMPX_UT_ADDR_V6) - if (getaddrinfo (hostname, NULL, NULL, &info) == 0) { - /* getaddrinfo might not be reliable. - * Just try to log what may be useful. - */ - if (info->ai_family == AF_INET) { - struct sockaddr_in *sa = - (struct sockaddr_in *) info->ai_addr; -#ifdef HAVE_STRUCT_UTMPX_UT_ADDR - memcpy (&utxent->ut_addr, - &(sa->sin_addr), - MIN (sizeof (utxent->ut_addr), - sizeof (sa->sin_addr))); -#endif /* HAVE_STRUCT_UTMPX_UT_ADDR */ -#ifdef HAVE_STRUCT_UTMPX_UT_ADDR_V6 - memcpy (utxent->ut_addr_v6, - &(sa->sin_addr), - MIN (sizeof (utxent->ut_addr_v6), - sizeof (sa->sin_addr))); - } else if (info->ai_family == AF_INET6) { - struct sockaddr_in6 *sa = - (struct sockaddr_in6 *) info->ai_addr; - memcpy (utxent->ut_addr_v6, - &(sa->sin6_addr), - MIN (sizeof (utxent->ut_addr_v6), - sizeof (sa->sin6_addr))); -#endif /* HAVE_STRUCT_UTMPX_UT_ADDR_V6 */ - } - freeaddrinfo (info); - } -#endif /* HAVE_STRUCT_UTMPX_UT_ADDR || HAVE_STRUCT_UTMPX_UT_ADDR_V6 */ - free (hostname); - } - /* ut_exit is only for DEAD_PROCESS */ - utxent->ut_session = getsid (0); - if (gettimeofday (&tv, NULL) == 0) { -#ifdef HAVE_STRUCT_UTMPX_UT_TIME - utxent->ut_time = tv.tv_sec; -#endif /* HAVE_STRUCT_UTMPX_UT_TIME */ -#ifdef HAVE_STRUCT_UTMPX_UT_XTIME - utxent->ut_xtime = tv.tv_usec; -#endif /* HAVE_STRUCT_UTMPX_UT_XTIME */ - utxent->ut_tv.tv_sec = tv.tv_sec; - utxent->ut_tv.tv_usec = tv.tv_usec; - } - - return utxent; -} - -/* - * setutmpx - the UTMPX version for setutmp - */ -int setutmpx (struct utmpx *utx) -{ - int err = 0; - - assert (NULL != utx); - - setutxent (); - if (pututxline (utx) == NULL) { - err = 1; - } - endutxent (); - -#ifndef USE_PAM - /* This is done by pam_lastlog */ - updwtmpx (_WTMP_FILE "x", utx); -#endif /* ! USE_PAM */ - - return err; -} -#endif /* USE_UTMPX */ - |