* src/chsh.c: Added fail_exit().
* src/chsh.c: Use fail_exit() instead of exit(), this avoid calling closelog() every times. * src/chsh.c: Ignore the return value or pam_end(). * src/chsh.c: Simplify the PAM error handling. * src/chsh.c: Report failure to unlock files to stderr and syslog.
This commit is contained in:
nekral-guest
parent
0528803da6
commit
e069125a2c
10
ChangeLog
10
ChangeLog
@ -1,3 +1,13 @@
|
||||
2008-08-07 Nicolas François <nicolas.francois@centraliens.net>
|
||||
|
||||
* src/chsh.c: Added fail_exit().
|
||||
* src/chsh.c: Use fail_exit() instead of exit(), this avoid
|
||||
calling closelog() every times.
|
||||
* src/chsh.c: Ignore the return value or pam_end().
|
||||
* src/chsh.c: Simplify the PAM error handling.
|
||||
* src/chsh.c: Report failure to unlock files to stderr and
|
||||
syslog.
|
||||
|
||||
2008-08-07 Nicolas François <nicolas.francois@centraliens.net>
|
||||
|
||||
* src/chpasswd.c: Added fail_exit().
|
||||
|
||||
101
src/chsh.c
101
src/chsh.c
@ -67,10 +67,12 @@ static bool sflg = false; /* -s - set shell from command line */
|
||||
#ifdef USE_PAM
|
||||
static pam_handle_t *pamh = NULL;
|
||||
#endif
|
||||
static bool pw_locked = false;
|
||||
|
||||
/* external identifiers */
|
||||
|
||||
/* local function prototypes */
|
||||
static void fail_exit (int code);
|
||||
static void usage (void);
|
||||
static void new_fields (void);
|
||||
static bool shell_is_listed (const char *);
|
||||
@ -79,6 +81,24 @@ static void process_flags (int argc, char **argv);
|
||||
static void check_perms (const struct passwd *pw);
|
||||
static void update_shell (const char *user, char *loginsh);
|
||||
|
||||
/*
|
||||
* fail_exit - do some cleanup and exit with the given error code
|
||||
*/
|
||||
static void fail_exit (int code)
|
||||
{
|
||||
if (pw_locked) {
|
||||
if (pw_unlock () == 0) {
|
||||
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
|
||||
SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
|
||||
/* continue */
|
||||
}
|
||||
}
|
||||
|
||||
closelog ();
|
||||
|
||||
exit (code);
|
||||
}
|
||||
|
||||
/*
|
||||
* usage - print command line syntax and exit
|
||||
*/
|
||||
@ -241,11 +261,10 @@ static void check_perms (const struct passwd *pw)
|
||||
*/
|
||||
if (!amroot && pw->pw_uid != getuid ()) {
|
||||
SYSLOG ((LOG_WARN, "can't change shell for '%s'", pw->pw_name));
|
||||
closelog ();
|
||||
fprintf (stderr,
|
||||
_("You may not change the shell for '%s'.\n"),
|
||||
pw->pw_name);
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -254,11 +273,10 @@ static void check_perms (const struct passwd *pw)
|
||||
*/
|
||||
if (!amroot && is_restricted_shell (pw->pw_shell)) {
|
||||
SYSLOG ((LOG_WARN, "can't change shell for '%s'", pw->pw_name));
|
||||
closelog ();
|
||||
fprintf (stderr,
|
||||
_("You may not change the shell for '%s'.\n"),
|
||||
pw->pw_name);
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
#ifdef WITH_SELINUX
|
||||
/*
|
||||
@ -269,11 +287,10 @@ static void check_perms (const struct passwd *pw)
|
||||
&& (is_selinux_enabled () > 0)
|
||||
&& (selinux_check_passwd_access (PASSWD__CHSH) != 0)) {
|
||||
SYSLOG ((LOG_WARN, "can't change shell for '%s'", pw->pw_name));
|
||||
closelog ();
|
||||
fprintf (stderr,
|
||||
_("You may not change the shell for '%s'.\n"),
|
||||
pw->pw_name);
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -292,29 +309,24 @@ static void check_perms (const struct passwd *pw)
|
||||
retval = PAM_SUCCESS;
|
||||
|
||||
pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
|
||||
if (pampw == NULL) {
|
||||
if (NULL == pampw) {
|
||||
retval = PAM_USER_UNKNOWN;
|
||||
}
|
||||
|
||||
if (retval == PAM_SUCCESS) {
|
||||
if (PAM_SUCCESS == retval) {
|
||||
retval = pam_start ("chsh", pampw->pw_name, &conv, &pamh);
|
||||
}
|
||||
|
||||
if (retval == PAM_SUCCESS) {
|
||||
if (PAM_SUCCESS == retval) {
|
||||
retval = pam_authenticate (pamh, 0);
|
||||
if (retval != PAM_SUCCESS) {
|
||||
pam_end (pamh, retval);
|
||||
}
|
||||
}
|
||||
|
||||
if (retval == PAM_SUCCESS) {
|
||||
if (PAM_SUCCESS == retval) {
|
||||
retval = pam_acct_mgmt (pamh, 0);
|
||||
if (retval != PAM_SUCCESS) {
|
||||
pam_end (pamh, retval);
|
||||
}
|
||||
}
|
||||
|
||||
if (retval != PAM_SUCCESS) {
|
||||
if (PAM_SUCCESS != retval) {
|
||||
(void) pam_end (pamh, retval);
|
||||
fprintf (stderr, _("%s: PAM authentication failed\n"), Prog);
|
||||
exit (E_NOPERM);
|
||||
}
|
||||
@ -341,9 +353,8 @@ static void update_shell (const char *user, char *newshell)
|
||||
*/
|
||||
if (setuid (0) != 0) {
|
||||
SYSLOG ((LOG_ERR, "can't setuid(0)"));
|
||||
closelog ();
|
||||
fputs (_("Cannot change ID to root.\n"), stderr);
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
pwd_init ();
|
||||
|
||||
@ -352,18 +363,16 @@ static void update_shell (const char *user, char *newshell)
|
||||
* the password file. Get a lock on the file and open it.
|
||||
*/
|
||||
if (pw_lock () == 0) {
|
||||
SYSLOG ((LOG_WARN, "cannot lock %s", pw_dbname ()));
|
||||
closelog ();
|
||||
fprintf (stderr, _("%s: cannot lock %s; try again later.\n"),
|
||||
Prog, pw_dbname ());
|
||||
exit (1);
|
||||
SYSLOG ((LOG_WARN, "cannot lock %s", pw_dbname ()));
|
||||
fail_exit (1);
|
||||
}
|
||||
pw_locked = true;
|
||||
if (pw_open (O_RDWR) == 0) {
|
||||
SYSLOG ((LOG_ERR, "cannot open %s", pw_dbname ()));
|
||||
closelog ();
|
||||
fprintf (stderr, _("%s: cannot open %s\n"), Prog, pw_dbname ());
|
||||
pw_unlock ();
|
||||
exit (1);
|
||||
SYSLOG ((LOG_ERR, "cannot open %s", pw_dbname ()));
|
||||
fail_exit (1);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -374,11 +383,10 @@ static void update_shell (const char *user, char *newshell)
|
||||
*/
|
||||
pw = pw_locate (user);
|
||||
if (NULL == pw) {
|
||||
pw_unlock ();
|
||||
fprintf (stderr,
|
||||
_("%s: user '%s' does not exist in %s\n"),
|
||||
Prog, user, pw_dbname ());
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -394,29 +402,24 @@ static void update_shell (const char *user, char *newshell)
|
||||
*/
|
||||
if (pw_update (&pwent) == 0) {
|
||||
SYSLOG ((LOG_ERR, "error updating passwd entry"));
|
||||
closelog ();
|
||||
fputs (_("Error updating the password entry.\n"), stderr);
|
||||
pw_unlock ();
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Changes have all been made, so commit them and unlock the file.
|
||||
*/
|
||||
if (pw_close () == 0) {
|
||||
SYSLOG ((LOG_ERR, "failure while writing changes to %s", pw_dbname ()));
|
||||
closelog ();
|
||||
fprintf (stderr, _("%s: failure while writing changes to %s\n"), Prog, pw_dbname ());
|
||||
pw_unlock ();
|
||||
exit (1);
|
||||
SYSLOG ((LOG_ERR, "failure while writing changes to %s", pw_dbname ()));
|
||||
fail_exit (1);
|
||||
}
|
||||
if (pw_unlock () == 0) {
|
||||
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
|
||||
SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
|
||||
closelog ();
|
||||
fprintf (stderr,
|
||||
_("%s: failed to unlock %s\n"), Prog, pw_dbname ());
|
||||
exit (1);
|
||||
/* continue */
|
||||
}
|
||||
pw_locked= false;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -462,16 +465,15 @@ int main (int argc, char **argv)
|
||||
if (NULL == pw) {
|
||||
fprintf (stderr,
|
||||
_("%s: user '%s' does not exist\n"), Prog, user);
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
} else {
|
||||
pw = get_my_pwent ();
|
||||
if (NULL == pw) {
|
||||
fprintf (stderr,
|
||||
_
|
||||
("%s: Cannot determine your user name.\n"),
|
||||
_("%s: Cannot determine your user name.\n"),
|
||||
Prog);
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
user = xstrdup (pw->pw_name);
|
||||
}
|
||||
@ -491,11 +493,10 @@ int main (int argc, char **argv)
|
||||
if (!yp_get_default_domain (&nis_domain) &&
|
||||
!yp_master (nis_domain, "passwd.byname", &nis_master)) {
|
||||
fprintf (stderr,
|
||||
_
|
||||
("%s: '%s' is the NIS master for this client.\n"),
|
||||
_("%s: '%s' is the NIS master for this client.\n"),
|
||||
Prog, nis_master);
|
||||
}
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -526,15 +527,13 @@ int main (int argc, char **argv)
|
||||
*/
|
||||
if (valid_field (loginsh, ":,=") != 0) {
|
||||
fprintf (stderr, _("%s: Invalid entry: %s\n"), Prog, loginsh);
|
||||
closelog ();
|
||||
exit (1);
|
||||
fail_exit (1);
|
||||
}
|
||||
if ( !amroot
|
||||
&& ( is_restricted_shell (loginsh)
|
||||
|| (access (loginsh, X_OK) != 0))) {
|
||||
fprintf (stderr, _("%s is an invalid shell.\n"), loginsh);
|
||||
closelog ();
|
||||
exit (1);
|
||||
fprintf (stderr, _("%s: %s is an invalid shell.\n"), Prog, loginsh);
|
||||
fail_exit (1);
|
||||
}
|
||||
|
||||
update_shell (user, loginsh);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user