/* login_init_entry(struct logininfo *, int, char*, char*, char*)
* - initialise a struct logininfo
*
* Populates a new struct logininfo, a data structure meant to carry
* the information required to portably record login info.
*
* Returns: 1
*/
int
login_init_entry(struct logininfo *li, int pid, const char *username,
const char *hostname, const char *line)
{
struct passwd *pw;
memset(li, 0, sizeof(*li));
li->pid = pid;
/* set the line information */
if (line)
line_fullname(li->line, line, sizeof(li->line));
if (username) {
strlcpy(li->username, username, sizeof(li->username));
pw = getpwnam(li->username);
if (pw == NULL)
dropbear_exit("login_init_entry: Cannot find user \"%s\"",
li->username);
li->uid = pw->pw_uid;
}
if (hostname)
strlcpy(li->hostname, hostname, sizeof(li->hostname));
return 1;
}
/* write the entry */
if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) {
close(fd);
logit("%s: Error writing to %s: %s", __func__,
LASTLOG_FILE, strerror(errno));
return (0);
}
close(fd);
return (1);
default:
logit("%s: Invalid type field", __func__);
return (0);
}
}
#endif /* LASTLOG_WRITE_PUTUTXLINE */
#ifdef HAVE_GETLASTLOGXBYNAME
int
lastlog_get_entry(struct logininfo *li)
{
struct lastlogx l, *ll;
if ((ll = getlastlogxbyname(li->username, &l)) == NULL) {
memset(&l, '\0', sizeof(l));
ll = &l;
}
line_fullname(li->line, ll->ll_line, sizeof(li->line));
strlcpy(li->hostname, ll->ll_host,
MIN_SIZEOF(li->hostname, ll->ll_host));
li->tv_sec = ll->ll_tv.tv_sec;
li->tv_usec = ll->ll_tv.tv_usec;
return (1);
}
#else /* HAVE_GETLASTLOGXBYNAME */
int
lastlog_get_entry(struct logininfo *li)
{
struct lastlog last;
int fd, ret;
if (!lastlog_openseek(li, &fd, O_RDONLY))
return (0);
ret = atomicio(read, fd, &last, sizeof(last));
close(fd);
switch (ret) {
case 0:
memset(&last, '\0', sizeof(last));
/* FALLTHRU */
case sizeof(last):
line_fullname(li->line, last.ll_line, sizeof(li->line));
strlcpy(li->hostname, last.ll_host,
MIN_SIZEOF(li->hostname, last.ll_host));
li->tv_sec = last.ll_time;
return (1);
case -1:
error("%s: Error reading from %s: %s", __func__,
LASTLOG_FILE, strerror(errno));
return (0);
default:
error("%s: Error reading from %s: Expecting %d, got %d",
__func__, LASTLOG_FILE, (int)sizeof(last), ret);
return (0);
}
/* NOTREACHED */
return (0);
}
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,
MIN_SIZEOF(li->hostname, last->ll_host));
li->tv_sec = last->ll_time;
}
int
lastlog_get_entry(struct logininfo *li)
{
struct lastlogx l, *ll;
if ((ll = getlastlogxbyname(li->username, &l)) == NULL) {
memset(&l, '\0', sizeof(l));
ll = &l;
}
line_fullname(li->line, ll->ll_line, sizeof(li->line));
strlcpy(li->hostname, ll->ll_host,
MIN_SIZEOF(li->hostname, ll->ll_host));
li->tv_sec = ll->ll_tv.tv_sec;
li->tv_usec = ll->ll_tv.tv_usec;
return (1);
}
void
testLineName(char *line)
{
/* have to null-terminate - these functions are designed for
* structures with fixed-length char arrays, and don't null-term.*/
char full[17], strip[9], abbrev[5];
memset(full, '\0', sizeof(full));
memset(strip, '\0', sizeof(strip));
memset(abbrev, '\0', sizeof(abbrev));
line_fullname(full, line, sizeof(full)-1);
line_stripname(strip, full, sizeof(strip)-1);
line_abbrevname(abbrev, full, sizeof(abbrev)-1);
printf("%s: %s, %s, %s\n", line, full, strip, abbrev);
} /* testLineName() */
int
utmpx_get_entry(struct logininfo *li)
{
struct utmpx *utx;
if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0)
return (0);
utx = getutxuser(li->username);
if (utx == NULL) {
endutxent();
return (0);
}
line_fullname(li->line, utx->ut_line,
MIN_SIZEOF(li->line, utx->ut_line));
strlcpy(li->hostname, utx->ut_host,
MIN_SIZEOF(li->hostname, utx->ut_host));
li->tv_sec = utx->ut_tv.tv_sec;
li->tv_usec = utx->ut_tv.tv_usec;
endutxent();
return (1);
}
/* login_init_entry(struct logininfo *, int, char*, char*, char*)
* - initialise a struct logininfo
*
* Populates a new struct logininfo, a data structure meant to carry
* the information required to portably record login info.
*
* Returns: 1
*/
int
login_init_entry(struct logininfo *li, int pid, const char *username,
const char *hostname, const char *line)
{
struct passwd *pw;
memset(li, 0, sizeof(*li));
li->pid = pid;
/* set the line information */
if (line)
line_fullname(li->line, line, sizeof(li->line));
if (username) {
strlcpy(li->username, username, sizeof(li->username));
pw = getpwnam(li->username);
if (pw == NULL) {
#if 0
/*
* This behavior caused bug 12199.
*/
fatal("login_init_entry: Cannot find user \"%s\"", li->username);
#else
li->uid = -1;
#endif
}
else {
li->uid = pw->pw_uid;
}
}
if (hostname)
strlcpy(li->hostname, hostname, sizeof(li->hostname));
return 1;
}
int
wtmpx_get_entry(struct logininfo *li)
{
struct stat st;
struct utmpx utx;
int fd, found=0;
/* Clear the time entries */
li->tv_sec = li->tv_usec = 0;
if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) {
logit("wtmpx_get_entry: problem opening %s: %s",
WTMPX_FILE, strerror(errno));
return 0;
}
if (fstat(fd, &st) != 0) {
logit("wtmpx_get_entry: couldn't stat %s: %s",
WTMPX_FILE, strerror(errno));
close(fd);
return 0;
}
/* Seek to the start of the last struct utmpx */
if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) {
/* probably a newly rotated wtmpx file */
close(fd);
return 0;
}
while (!found) {
if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) {
logit("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 ( wtmpx_islogin(li, &utx) ) {
found = 1;
# 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(li->line));
# ifdef HAVE_HOST_IN_UTMPX
strlcpy(li->hostname, utx.ut_host,
MIN_SIZEOF(li->hostname, utx.ut_host));
# endif
continue;
}
if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) {
close (fd);
return 0;
}
}
close(fd);
return 1;
}
int
wtmp_get_entry(struct logininfo *li)
{
struct stat st;
struct utmp ut;
int fd, found=0;
/* Clear the time entries in our logininfo */
li->tv_sec = li->tv_usec = 0;
if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) {
logit("wtmp_get_entry: problem opening %s: %s",
WTMP_FILE, strerror(errno));
return 0;
}
if (fstat(fd, &st) != 0) {
logit("wtmp_get_entry: couldn't stat %s: %s",
WTMP_FILE, strerror(errno));
close(fd);
return 0;
}
/* Seek to the start of the last struct utmp */
if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) {
/* Looks like we've got a fresh wtmp file */
close(fd);
return 0;
}
while (!found) {
if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) {
logit("wtmp_get_entry: read of %s failed: %s",
WTMP_FILE, strerror(errno));
close (fd);
return 0;
}
if ( wtmp_islogin(li, &ut) ) {
found = 1;
/* We've already checked for a time in struct
* utmp, in login_getlast(). */
# 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,
MIN_SIZEOF(li->line, ut.ut_line));
# ifdef HAVE_HOST_IN_UTMP
strlcpy(li->hostname, ut.ut_host,
MIN_SIZEOF(li->hostname, ut.ut_host));
# endif
continue;
}
/* Seek back 2 x struct utmp */
if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) {
/* We've found the start of the file, so quit */
close (fd);
return 0;
}
}
/* We found an entry. Tidy up and return */
close(fd);
return 1;
}
