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* src/faillog.c: Added support for the specification of a range of

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users with -u.
	* src/faillog.c: Do not call print_one() for users which do not
	exist.
	* src/faillog.c: Make sure the user's entry is not outside the
	faillog file and initialize the faillog structure in that case.
	* src/faillog.c: Move print_one() closer to print().
	* src/faillog.c: reset(), setmax(), set_locktime() can also change
	entries of user which do not exist.
	* src/faillog.c: reset(), setmax() and set_locktime() shall not
	create entries for users which have no entries if the value has to
	be set to 0.
	* src/faillog.c: reset(), setmax() and set_locktime(): better
	handling of users whose entry is outside the faillog file.
	* src/faillog.c: Improved option handling. Options can now be
	specified in any order.
	* src/faillog.c: Improved warnings when options are not
	compatible or when the faillog cannot be open with the right mode.
	* src/faillog.c: Only fstat the faillog file once.
	* man/faillog.8.xml: Improved documentation.
This commit is contained in:
nekral-guest 2009-03-13 22:49:20 +00:00
parent fafe281d31
commit 730fc8fc33
4 changed files with 516 additions and 255 deletions
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20
ChangeLog
View File

@ -10,6 +10,26 @@
* src/chgpasswd.c: Fix the test for getlong() failure. * src/chgpasswd.c: Fix the test for getlong() failure.
* src/useradd.c, man/useradd.8.xml: Added long name for the -l * src/useradd.c, man/useradd.8.xml: Added long name for the -l
option: --no-log-init. option: --no-log-init.
* src/faillog.c: Added support for the specification of a range of
users with -u.
* src/faillog.c: Do not call print_one() for users which do not
exist.
* src/faillog.c: Make sure the user's entry is not outside the
faillog file and initialize the faillog structure in that case.
* src/faillog.c: Move print_one() closer to print().
* src/faillog.c: reset(), setmax(), set_locktime() can also change
entries of user which do not exist.
* src/faillog.c: reset(), setmax() and set_locktime() shall not
create entries for users which have no entries if the value has to
be set to 0.
* src/faillog.c: reset(), setmax() and set_locktime(): better
handling of users whose entry is outside the faillog file.
* src/faillog.c: Improved option handling. Options can now be
specified in any order.
* src/faillog.c: Improved warnings when options are not
compatible or when the faillog cannot be open with the right mode.
* src/faillog.c: Only fstat the faillog file once.
* man/faillog.8.xml: Improved documentation.
2009-03-13 Nicolas François <nicolas.francois@centraliens.net> 2009-03-13 Nicolas François <nicolas.francois@centraliens.net>

6
NEWS
View File

@ -37,6 +37,12 @@ shadow-4.1.2.2 -> shadow-4.1.3 UNRELEASED
- Translations - Translations
* New Kazakh translation. * New Kazakh translation.
- faillog
* Accept users specified as a numerical UID, or ranges of users (-user,
user-, user1-user2).
* -l, -m, and -r now apply not only to existing users, but to all the
specified UIDs.
* Options can be specified in any order.
- gpasswd - gpasswd
* Added support for long options --add (-a), --delete (-d), * Added support for long options --add (-a), --delete (-d),
--remove-password (-r), --restrict (-R), --administrators (-A), and --remove-password (-r), --restrict (-R), --administrators (-A), and

63
man/faillog.8.xml
View File

@ -1,7 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<!-- <!--
Copyright (c) 1989 - 1994, Julianne Frances Haugh Copyright (c) 1989 - 1994, Julianne Frances Haugh
Copyright (c) 2007 - 2008, Nicolas François Copyright (c) 2007 - 2009, Nicolas François
All rights reserved. All rights reserved.
Redistribution and use in source and binary forms, with or without Redistribution and use in source and binary forms, with or without
@ -70,7 +70,10 @@
<varlistentry> <varlistentry>
<term><option>-a</option>, <option>--all</option></term> <term><option>-a</option>, <option>--all</option></term>
<listitem> <listitem>
<para>Display faillog records for all users.</para> <para>
Display (or act on) faillog records for all users having an
entry in the <filename>faillog</filename> database.
</para>
</listitem> </listitem>
</varlistentry> </varlistentry>
<varlistentry> <varlistentry>
@ -89,6 +92,10 @@
Lock account to <replaceable>SEC</replaceable> Lock account to <replaceable>SEC</replaceable>
seconds after failed login. seconds after failed login.
</para> </para>
<para>
Write access to <filename>/var/log/faillog</filename>
is required for this option.
</para>
</listitem> </listitem>
</varlistentry> </varlistentry>
<varlistentry> <varlistentry>
@ -99,12 +106,22 @@
<listitem> <listitem>
<para> <para>
Set maximum number of login failures after the account is Set maximum number of login failures after the account is
disabled to <replaceable>MAX</replaceable>. Selecting disabled to <replaceable>MAX</replaceable>.
</para>
<para>
Selecting a
<replaceable>MAX</replaceable> value of 0 has the effect of not <replaceable>MAX</replaceable> value of 0 has the effect of not
placing a limit on the number of failed logins. The maximum placing a limit on the number of failed logins.
</para>
<para>
The maximum
failure count should always be 0 for <emphasis>root</emphasis> failure count should always be 0 for <emphasis>root</emphasis>
to prevent a denial of services attack against the system. to prevent a denial of services attack against the system.
</para> </para>
<para>
Write access to <filename>/var/log/faillog</filename>
is required for this option.
</para>
</listitem> </listitem>
</varlistentry> </varlistentry>
<varlistentry> <varlistentry>
@ -113,7 +130,10 @@
<para> <para>
Reset the counters of login failures or one record if used with Reset the counters of login failures or one record if used with
the <option>-u</option> <replaceable>LOGIN</replaceable> the <option>-u</option> <replaceable>LOGIN</replaceable>
option. Write access to <filename>/var/log/faillog</filename> option.
</para>
<para>
Write access to <filename>/var/log/faillog</filename>
is required for this option. is required for this option.
</para> </para>
</listitem> </listitem>
@ -125,25 +145,48 @@
<listitem> <listitem>
<para> <para>
Display faillog records more recent than Display faillog records more recent than
<replaceable>DAYS</replaceable>. The <option>-t</option> <replaceable>DAYS</replaceable>.
flag overrides the use of <option>-u</option>.
</para> </para>
</listitem> </listitem>
</varlistentry> </varlistentry>
<varlistentry> <varlistentry>
<term> <term>
<option>-u</option>, <option>--user</option> <replaceable>LOGIN</replaceable> <option>-u</option>, <option>--user</option>
<replaceable>LOGIN</replaceable>|<replaceable>RANGE</replaceable>
</term> </term>
<listitem> <listitem>
<para> <para>
Display faillog record or maintains failure counters and limits Display faillog record or maintains failure counters and limits
(if used with <option>-l</option>, <option>-m</option> or (if used with <option>-l</option>, <option>-m</option> or
<option>-r</option> options) only for user with <option>-r</option> options) only for the specified user(s).
<replaceable>LOGIN</replaceable>. </para>
<para>
The users can be specified by a login name, a numerical user
ID, or a <replaceable>RANGE</replaceable> of users. This
<replaceable>RANGE</replaceable> of users can be specified
with a min and max values
(<replaceable>UID_MIN-UID_MAX</replaceable>), a max value
(<replaceable>-UID_MAX</replaceable>), or a min value
(<replaceable>UID_MIN-</replaceable>).
</para> </para>
</listitem> </listitem>
</varlistentry> </varlistentry>
</variablelist> </variablelist>
<para>
When none of the <option>-l</option>, <option>-m</option>, or
<option>-r</option> options are used, <command>faillog</command>
displays the faillog record of the specified user(s).
</para>
<para>
NOTE: in display mode, only the records of users which currently
exist in the system are displayed. In the other modes (when the
<option>-l</option>, <option>-m</option>, or <option>-r</option>
options are used), the records of the user, or the range of users,
or all the users that may have an entry in the faillog database will
be changed. This is useful to reset records of users that have been
deleted or set a policy in advance for a range of users.
</para>
</refsect1> </refsect1>
<refsect1 id='caveats'> <refsect1 id='caveats'>

682
src/faillog.c
View File

@ -2,7 +2,7 @@
* Copyright (c) 1989 - 1993, Julianne Frances Haugh * Copyright (c) 1989 - 1993, Julianne Frances Haugh
* Copyright (c) 1996 - 2000, Marek Michałkiewicz * Copyright (c) 1996 - 2000, Marek Michałkiewicz
* Copyright (c) 2002 - 2006, Tomasz Kłoczko * Copyright (c) 2002 - 2006, Tomasz Kłoczko
* Copyright (c) 2007 - 2008, Nicolas François * Copyright (c) 2007 - 2009, Nicolas François
* All rights reserved. * All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
@ -40,6 +40,7 @@
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/types.h> #include <sys/types.h>
#include <time.h> #include <time.h>
#include <assert.h>
#include "defines.h" #include "defines.h"
#include "exitcodes.h" #include "exitcodes.h"
#include "faillog.h" #include "faillog.h"
@ -48,14 +49,19 @@
* Global variables * Global variables
*/ */
static FILE *fail; /* failure file stream */ static FILE *fail; /* failure file stream */
static uid_t user; /* one single user, specified on command line */
static int days; /* number of days to consider for print command */
static time_t seconds; /* that number of days in seconds */ static time_t seconds; /* that number of days in seconds */
static unsigned long umin; /* if uflg and has_umin, only display users with uid >= umin */
static bool has_umin = false;
static unsigned long umax; /* if uflg and has_umax, only display users with uid <= umax */
static bool has_umax = false;
static bool errors = false;
static bool static bool aflg = false; /* set if all users are to be printed always */
aflg = false, /* set if all users are to be printed always */ static bool uflg = false; /* set if user is a valid user id */
uflg = false, /* set if user is a valid user id */ static bool tflg = false; /* print is restricted to most recent days */
tflg = false; /* print is restricted to most recent days */ static bool lflg = false; /* set the locktime */
static bool mflg = false; /* set maximum failed login counters */
static bool rflg = false; /* reset the counters of login failures */
static struct stat statbuf; /* fstat buffer for file size */ static struct stat statbuf; /* fstat buffer for file size */
@ -68,7 +74,7 @@ static void usage (void)
"Options:\n" "Options:\n"
" -a, --all display faillog records for all users\n" " -a, --all display faillog records for all users\n"
" -h, --help display this help message and exit\n" " -h, --help display this help message and exit\n"
" -l, --lock-time SEC after failed login lock accout to SEC seconds\n" " -l, --lock-time SEC after failed login lock account to SEC seconds\n"
" -m, --maximum MAX set maximum failed login counters to MAX\n" " -m, --maximum MAX set maximum failed login counters to MAX\n"
" -r, --reset reset the counters of login failures\n" " -r, --reset reset the counters of login failures\n"
" -t, --time DAYS display faillog records more recent than DAYS\n" " -t, --time DAYS display faillog records more recent than DAYS\n"
@ -79,259 +85,388 @@ static void usage (void)
exit (E_USAGE); exit (E_USAGE);
} }
static void print_one (const struct faillog *fl, uid_t uid) static void print_one (const struct passwd *pw, bool force)
{ {
static bool once = false; static bool once = false;
char *cp;
struct tm *tm; struct tm *tm;
off_t offset;
struct faillog fl;
time_t now; time_t now;
struct passwd *pwent;
#ifdef HAVE_STRFTIME #ifdef HAVE_STRFTIME
char *cp;
char ptime[80]; char ptime[80];
#endif #endif
if (NULL == pw) {
return;
}
offset = pw->pw_uid * sizeof (fl);
if (offset <= (statbuf.st_size - sizeof (fl))) {
/* fseeko errors are not really relevant for us. */
assert ( fseeko (fail, offset, SEEK_SET) == 0 );
/* faillog is a sparse file. Even if no entries were
* entered for this user, which should be able to get the
* empty entry in this case.
*/
if (fread ((char *) &fl, sizeof (fl), 1, fail) != 1) {
fprintf (stderr,
_("faillog: Failed to get the entry for UID %d\n"),
pw->pw_uid);
return;
}
} else {
/* Outsize of the faillog file.
* Behave as if there were a missing entry (same behavior
* as if we were reading an non existing entry in the
* sparse faillog file).
*/
memzero (&fl, sizeof (fl));
}
/* Nothing to report */
if (!force && (0 == fl.fail_time)) {
return;
}
(void) time(&now);
/* Filter out entries that do not match with the -t option */
if (tflg && ((now - fl.fail_time) > seconds)) {
return;
}
/* Print the header only once */
if (!once) { if (!once) {
puts (_("Login Failures Maximum Latest On\n")); puts (_("Login Failures Maximum Latest On\n"));
once = true; once = true;
} }
pwent = getpwuid (uid); /* local, no need for xgetpwuid */
(void) time (&now); tm = localtime (&fl.fail_time);
tm = localtime (&fl->fail_time);
#ifdef HAVE_STRFTIME #ifdef HAVE_STRFTIME
strftime (ptime, sizeof (ptime), "%D %H:%M:%S %z", tm); strftime (ptime, sizeof (ptime), "%D %H:%M:%S %z", tm);
cp = ptime; cp = ptime;
#endif #endif
if (NULL != pwent) { printf ("%-9s %5d %5d ",
printf ("%-9s %5d %5d ", pw->pw_name, fl.fail_cnt, fl.fail_max);
pwent->pw_name, fl->fail_cnt, fl->fail_max); /* FIXME: cp is not defined ifndef HAVE_STRFTIME */
if ((time_t) 0 != fl->fail_time) { printf ("%s %s", cp, fl.fail_line);
/* FIXME: cp is not defined ifndef HAVE_STRFTIME */ if (0 != fl.fail_locktime) {
printf ("%s %s", cp, fl->fail_line); if ( ((fl.fail_time + fl.fail_locktime) > now)
if (0 != fl->fail_locktime) { && (0 != fl.fail_cnt)) {
if ( ((fl->fail_time+fl->fail_locktime) > now) printf (_(" [%lus left]"),
&& (0 != fl->fail_cnt)) { (unsigned long) fl.fail_time + fl.fail_locktime - now);
printf (_(" [%lus left]"), } else {
(unsigned long) fl->fail_time + fl->fail_locktime - now); printf (_(" [%lds lock]"),
} else { fl.fail_locktime);
printf (_(" [%lds lock]"),
fl->fail_locktime);
}
}
} }
putchar ('\n');
}
}
static int reset_one (uid_t uid)
{
off_t offset;
struct faillog faillog;
offset = uid * sizeof faillog;
if (fstat (fileno (fail), &statbuf) != 0) {
perror (FAILLOG_FILE);
return 0;
}
if (offset >= statbuf.st_size) {
return 0;
}
if (fseeko (fail, offset, SEEK_SET) != 0) {
perror (FAILLOG_FILE);
return 0;
}
if (fread ((char *) &faillog, sizeof faillog, 1, fail) != 1) {
if (feof (fail) == 0) {
perror (FAILLOG_FILE);
}
return 0;
}
if (0 == faillog.fail_cnt) {
return 1; /* don't fill in no holes ... */
}
faillog.fail_cnt = 0;
if ( (fseeko (fail, offset, SEEK_SET) == 0)
&& (fwrite ((char *) &faillog, sizeof faillog, 1, fail) == 1)) {
fflush (fail);
return 1;
} else {
perror (FAILLOG_FILE);
}
return 0;
}
static void reset (void)
{
uid_t uid;
if (uflg) {
reset_one (user);
} else {
struct passwd *pwent;
setpwent ();
while ( (pwent = getpwent ()) != NULL ) {
reset_one (pwent->pw_uid);
}
endpwent ();
} }
putchar ('\n');
} }
static void print (void) static void print (void)
{ {
uid_t uid; if (uflg && has_umin && has_umax && (umin==umax)) {
off_t offset; print_one (getpwuid ((uid_t)umin), true);
struct faillog faillog;
if (uflg) {
offset = user * sizeof faillog;
if (fstat (fileno (fail), &statbuf) != 0) {
perror (FAILLOG_FILE);
return;
}
if (offset >= statbuf.st_size) {
return;
}
fseeko (fail, (off_t) user * sizeof faillog, SEEK_SET);
if (fread ((char *) &faillog, sizeof faillog, 1, fail) == 1) {
print_one (&faillog, user);
} else {
perror (FAILLOG_FILE);
}
} else { } else {
for (uid = 0; /* We only print records for existing users.
fread ((char *) &faillog, sizeof faillog, 1, fail) == 1; * Loop based on the user database instead of reading the
uid++) { * whole file. We will have to query the database anyway
* so except for very small ranges and large user
* database, this should not be a performance issue.
*/
struct passwd *pwent;
if (!aflg && (0 == faillog.fail_cnt)) {
continue;
}
if (!aflg && tflg &&
((NOW - faillog.fail_time) > seconds)) {
continue;
}
if (aflg && (0 == faillog.fail_time)) {
continue;
}
print_one (&faillog, uid);
}
}
}
static void setmax_one (uid_t uid, int max)
{
off_t offset;
struct faillog faillog;
offset = uid * sizeof faillog;
if (fseeko (fail, offset, SEEK_SET) != 0) {
perror (FAILLOG_FILE);
return;
}
if (fread ((char *) &faillog, sizeof faillog, 1, fail) != 1) {
if (feof (fail) == 0) {
perror (FAILLOG_FILE);
}
memzero (&faillog, sizeof faillog);
}
faillog.fail_max = max;
if ( (fseeko (fail, offset, SEEK_SET) == 0)
&& (fwrite ((char *) &faillog, sizeof faillog, 1, fail) == 1)) {
fflush (fail);
} else {
perror (FAILLOG_FILE);
}
}
static void setmax (int max)
{
struct passwd *pwent;
if (uflg) {
setmax_one (user, max);
} else {
setpwent (); setpwent ();
while ( (pwent = getpwent ()) != NULL ) { while ( (pwent = getpwent ()) != NULL ) {
setmax_one (pwent->pw_uid, max); if ( uflg
&& ( (has_umin && (pwent->pw_uid < (uid_t)umin))
|| (has_umax && (pwent->pw_uid > (uid_t)umax)))) {
continue;
}
print_one (pwent, aflg);
} }
endpwent (); endpwent ();
} }
} }
static void set_locktime_one (uid_t uid, long locktime)
{
off_t offset;
struct faillog faillog;
offset = uid * sizeof faillog;
if (fseeko (fail, offset, SEEK_SET) != 0) {
perror (FAILLOG_FILE);
return;
}
if (fread ((char *) &faillog, sizeof faillog, 1, fail) != 1) {
if (feof (fail) == 0) {
perror (FAILLOG_FILE);
}
memzero (&faillog, sizeof faillog);
}
faillog.fail_locktime = locktime;
if (fseeko (fail, offset, SEEK_SET) == 0
&& fwrite ((char *) &faillog, sizeof faillog, 1, fail) == 1) {
fflush (fail);
} else {
perror (FAILLOG_FILE);
}
}
/* /*
* XXX - this needs to be written properly some day, right now it is * reset_one - Reset the fail count for one user
* a quick cut-and-paste hack from the above two functions. --marekm *
* This returns a boolean indicating if an error occurred.
*/ */
static bool reset_one (uid_t uid)
{
off_t offset;
struct faillog fl;
offset = uid * sizeof (fl);
if (offset <= (statbuf.st_size - sizeof (fl))) {
/* fseeko errors are not really relevant for us. */
assert ( fseeko (fail, offset, SEEK_SET) == 0 );
/* faillog is a sparse file. Even if no entries were
* entered for this user, which should be able to get the
* empty entry in this case.
*/
if (fread ((char *) &fl, sizeof (fl), 1, fail) != 1) {
fprintf (stderr,
_("faillog: Failed to get the entry for UID %d\n"),
uid);
return true;
}
} else {
/* Outsize of the faillog file.
* Behave as if there were a missing entry (same behavior
* as if we were reading an non existing entry in the
* sparse faillog file).
*/
memzero (&fl, sizeof (fl));
}
if (0 == fl.fail_cnt) {
/* If the count is already null, do not write in the file.
* This avoids writing 0 when no entries were present for
* the user.
*/
return false;
}
fl.fail_cnt = 0;
if ( (fseeko (fail, offset, SEEK_SET) == 0)
&& (fwrite ((char *) &fl, sizeof (fl), 1, fail) == 1)) {
(void) fflush (fail);
return false;
}
fprintf (stderr,
_("faillog: Failed to reset fail count for UID %d\n"),
uid);
return true;
}
static void reset (void)
{
if (uflg && has_umin && has_umax && (umin==umax)) {
if (reset_one ((uid_t)umin)) {
errors = true;
}
} else {
/* Reset all entries in the specified range.
* Non existing entries will not be touched.
* Entries for non existing users are also reset.
*/
uid_t uid = 0;
uid_t uidmax = statbuf.st_size / sizeof (struct faillog);
/* Make sure we stay in the umin-umax range if specified */
if (has_umin) {
uid = (uid_t)umin;
}
if (has_umax && (uid_t)umax < uidmax) {
uidmax = (uid_t)umax;
}
while (uid < uidmax) {
if (reset_one (uid)) {
errors = true;
}
uid++;
}
}
}
/*
* setmax_one - Set the maximum failed login counter for one user
*
* This returns a boolean indicating if an error occurred.
*/
static bool setmax_one (uid_t uid, int max)
{
off_t offset;
struct faillog fl;
offset = (off_t) uid * sizeof (fl);
if (offset <= (statbuf.st_size - sizeof (fl))) {
/* fseeko errors are not really relevant for us. */
assert ( fseeko (fail, offset, SEEK_SET) == 0 );
/* faillog is a sparse file. Even if no entries were
* entered for this user, which should be able to get the
* empty entry in this case.
*/
if (fread ((char *) &fl, sizeof (fl), 1, fail) != 1) {
fprintf (stderr,
_("faillog: Failed to get the entry for UID %d\n"),
uid);
return true;
}
} else {
/* Outsize of the faillog file.
* Behave as if there were a missing entry (same behavior
* as if we were reading an non existing entry in the
* sparse faillog file).
*/
memzero (&fl, sizeof (fl));
}
if (max == fl.fail_max) {
/* If the max is already set to the right value, do not
* write in the file.
* This avoids writing 0 when no entries were present for
* the user and the max argument is 0.
*/
return false;
}
fl.fail_max = max;
if ( (fseeko (fail, offset, SEEK_SET) == 0)
&& (fwrite ((char *) &fl, sizeof (fl), 1, fail) == 1)) {
fflush (fail);
return false;
}
fprintf (stderr,
_("faillog: Failed to set max for UID %d\n"),
uid);
return true;
}
static void setmax (int max)
{
if (uflg && has_umin && has_umax && (umin==umax)) {
if (setmax_one ((uid_t)umin, max)) {
errors = true;
}
} else {
/* Set max for all entries in the specified range.
* If max is unchanged for an entry, the entry is not touched.
* If max is null, and no entries exist for this user, no
* entries will be created.
* Entries for non existing user are also taken into
* account (in order to define policy for future users).
*/
uid_t uid = 0;
uid_t uidmax = statbuf.st_size / sizeof (struct faillog);
/* Make sure we stay in the umin-umax range if specified */
if (has_umin) {
uid = (uid_t)umin;
}
if (has_umax && (uid_t)umax < uidmax) {
uidmax = (uid_t)umax;
}
while (uid < uidmax) {
if (setmax_one (uid, max)) {
errors = true;
}
uid++;
}
}
}
/*
* set_locktime_one - Set the locktime for one user
*
* This returns a boolean indicating if an error occurred.
*/
static bool set_locktime_one (uid_t uid, long locktime)
{
off_t offset;
struct faillog fl;
offset = (off_t) uid * sizeof (fl);
if (offset <= (statbuf.st_size - sizeof (fl))) {
/* fseeko errors are not really relevant for us. */
assert ( fseeko (fail, offset, SEEK_SET) == 0 );
/* faillog is a sparse file. Even if no entries were
* entered for this user, which should be able to get the
* empty entry in this case.
*/
if (fread ((char *) &fl, sizeof (fl), 1, fail) != 1) {
fprintf (stderr,
_("faillog: Failed to get the entry for UID %d\n"),
uid);
return true;
}
} else {
/* Outsize of the faillog file.
* Behave as if there were a missing entry (same behavior
* as if we were reading an non existing entry in the
* sparse faillog file).
*/
memzero (&fl, sizeof (fl));
}
if (locktime == fl.fail_locktime) {
/* If the max is already set to the right value, do not
* write in the file.
* This avoids writing 0 when no entries were present for
* the user and the max argument is 0.
*/
return false;
}
fl.fail_locktime = locktime;
if (fseeko (fail, offset, SEEK_SET) == 0
&& fwrite ((char *) &fl, sizeof (fl), 1, fail) == 1) {
fflush (fail);
return false;
}
fprintf (stderr,
_("faillog: Failed to set locktime for UID %d\n"),
uid);
return true;
}
static void set_locktime (long locktime) static void set_locktime (long locktime)
{ {
struct passwd *pwent; if (uflg && has_umin && has_umax && (umin==umax)) {
if (set_locktime_one ((uid_t)umin, locktime)) {
if (uflg) { errors = true;
set_locktime_one (user, locktime); }
} else { } else {
setpwent (); /* Set locktime for all entries in the specified range.
while ( (pwent = getpwent ()) != NULL ) { * If locktime is unchanged for an entry, the entry is not touched.
set_locktime_one (pwent->pw_uid, locktime); * If locktime is null, and no entries exist for this user, no
* entries will be created.
* Entries for non existing user are also taken into
* account (in order to define policy for future users).
*/
uid_t uid = 0;
uid_t uidmax = statbuf.st_size / sizeof (struct faillog);
/* Make sure we stay in the umin-umax range if specified */
if (has_umin) {
uid = (uid_t)umin;
}
if (has_umax && (uid_t)umax < uidmax) {
uidmax = (uid_t)umax;
}
while (uid < uidmax) {
if (set_locktime_one (uid, locktime)) {
errors = true;
}
uid++;
} }
endpwent ();
} }
} }
int main (int argc, char **argv) int main (int argc, char **argv)
{ {
bool anyflag = false; long fail_locktime;
long fail_max;
long days;
(void) setlocale (LC_ALL, ""); (void) setlocale (LC_ALL, "");
(void) bindtextdomain (PACKAGE, LOCALEDIR); (void) bindtextdomain (PACKAGE, LOCALEDIR);
(void) textdomain (PACKAGE); (void) textdomain (PACKAGE);
/* try to open for read/write, if that fails - read only */
fail = fopen (FAILLOG_FILE, "r+");
if (NULL == fail) {
fail = fopen (FAILLOG_FILE, "r");
}
if (NULL == fail) {
perror (FAILLOG_FILE);
exit (1);
}
{ {
int option_index = 0; int option_index = 0;
int c; int c;
@ -345,54 +480,76 @@ int main (int argc, char **argv)
{"user", required_argument, NULL, 'u'}, {"user", required_argument, NULL, 'u'},
{NULL, 0, NULL, '\0'} {NULL, 0, NULL, '\0'}
}; };
while ((c = getopt_long (argc, argv, "ahl:m:rt:u:",
while ((c = long_options, &option_index)) != -1) {
getopt_long (argc, argv, "ahl:m:rt:u:",
long_options, &option_index)) != -1) {
switch (c) { switch (c) {
case 'a': case 'a':
aflg = true; aflg = true;
if (uflg) {
usage ();
}
break; break;
case 'h': case 'h':
usage (); usage ();
break; break;
case 'l': case 'l':
set_locktime ((long) atoi (optarg)); if (getlong (optarg, &fail_locktime) == 0) {
anyflag = true; fprintf (stderr,
_("%s: invalid numeric argument '%s'\n"),
"faillog", optarg);
usage ();
}
lflg = true;
break; break;
case 'm': case 'm':
setmax (atoi (optarg)); if (getlong (optarg, &fail_max) == 0) {
anyflag = true; fprintf (stderr,
_("%s: invalid numeric argument '%s'\n"),
"faillog", optarg);
usage ();
}
mflg = true;
break; break;
case 'r': case 'r':
reset (); rflg = true;
anyflag = true;
break; break;
case 't': case 't':
days = atoi (optarg); if (getlong (optarg, &days) == 0) {
fprintf (stderr,
_("%s: invalid numeric argument '%s'\n"),
"faillog", optarg);
usage ();
}
seconds = (time_t) days * DAY; seconds = (time_t) days * DAY;
tflg = true; tflg = true;
break; break;
case 'u': case 'u':
{ {
/*
* The user can be:
* - a login name
* - numerical
* - a numerical login ID
* - a range (-x, x-, x-y)
*/
struct passwd *pwent; struct passwd *pwent;
if (aflg) {
usage ();
}
uflg = true;
/* local, no need for xgetpwnam */ /* local, no need for xgetpwnam */
pwent = getpwnam (optarg); pwent = getpwnam (optarg);
if (NULL == pwent) { if (NULL != pwent) {
fprintf (stderr, umin = (unsigned long) pwent->pw_uid;
_("Unknown User: %s\n"), has_umin = true;
optarg); umax = umin;
exit (1); has_umax = true;
} else {
if (getrange (optarg,
&umin, &has_umin,
&umax, &has_umax) == 0) {
fprintf (stderr,
_("lastlog: Unknown user or range: %s\n"),
optarg);
exit (EXIT_FAILURE);
}
} }
uflg = true;
user = pwent->pw_uid;
break; break;
} }
default: default:
@ -401,17 +558,52 @@ int main (int argc, char **argv)
} }
} }
/* no flags implies -a -p (= print information for all users) */ if (aflg && uflg) {
if (!(anyflag || aflg || tflg || uflg)) { usage ();
aflg = true;
} }
/* (-a or -t days or -u user) and no other flags implies -p if (tflg && (lflg || mflg || rflg)) {
(= print information for selected users) */ usage ();
if (!anyflag && (aflg || tflg || uflg)) { }
/* Open the faillog database */
if (lflg || mflg || rflg) {
fail = fopen (FAILLOG_FILE, "r+");
} else {
fail = fopen (FAILLOG_FILE, "r");
}
if (NULL == fail) {
fprintf (stderr,
_("faillog: Cannot open %s: %s\n"),
FAILLOG_FILE, strerror (errno));
exit (EXIT_FAILURE);
}
/* Get the size of the faillog */
if (fstat (fileno (fail), &statbuf) != 0) {
fprintf (stderr,
_("faillog: Cannot get the size of %s: %s\n"),
FAILLOG_FILE, strerror (errno));
exit (EXIT_FAILURE);
}
if (lflg) {
set_locktime (fail_locktime);
}
if (mflg) {
setmax (fail_max);
}
if (rflg) {
reset ();
}
if (!(lflg || mflg || rflg)) {
print (); print ();
} }
fclose (fail); fclose (fail);
exit (E_SUCCESS); exit (errors ? EXIT_FAILURE : EXIT_SUCCESS);
} }