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nss-systemd: use _cleanup_ for pthread_mutex_{lock,unlock}

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v2: separate the declaration from the assignment to appease clang.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2020-03-28 13:26:25 +01:00
parent 29d4392ca0
commit 37bc9dcc09
1 changed files with 39 additions and 62 deletions
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101
src/nss-systemd/nss-systemd.c
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@ -9,6 +9,7 @@
#include "group-record-nss.h"
#include "macro.h"
#include "nss-util.h"
#include "pthread-util.h"
#include "signal-util.h"
#include "strv.h"
#include "user-util.h"
@ -277,10 +278,11 @@ static enum nss_status nss_systemd_endent(GetentData *p) {
assert(p);
assert_se(pthread_mutex_lock(&p->mutex) == 0);
_cleanup_(pthread_mutex_unlock_assertp) pthread_mutex_t *_l = NULL;
_l = pthread_mutex_lock_assert(&p->mutex);
p->iterator = userdb_iterator_free(p->iterator);
p->by_membership = false;
assert_se(pthread_mutex_unlock(&p->mutex) == 0);
return NSS_STATUS_SUCCESS;
}
@ -294,45 +296,41 @@ enum nss_status _nss_systemd_endgrent(void) {
}
enum nss_status _nss_systemd_setpwent(int stayopen) {
enum nss_status ret;
PROTECT_ERRNO;
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
if (userdb_nss_compat_is_enabled() <= 0)
return NSS_STATUS_NOTFOUND;
assert_se(pthread_mutex_lock(&getpwent_data.mutex) == 0);
_cleanup_(pthread_mutex_unlock_assertp) pthread_mutex_t *_l = NULL;
int r;
_l = pthread_mutex_lock_assert(&getpwent_data.mutex);
getpwent_data.iterator = userdb_iterator_free(getpwent_data.iterator);
getpwent_data.by_membership = false;
ret = userdb_all(nss_glue_userdb_flags(), &getpwent_data.iterator) < 0 ?
NSS_STATUS_UNAVAIL : NSS_STATUS_SUCCESS;
assert_se(pthread_mutex_unlock(&getpwent_data.mutex) == 0);
return ret;
r = userdb_all(nss_glue_userdb_flags(), &getpwent_data.iterator);
return r < 0 ? NSS_STATUS_UNAVAIL : NSS_STATUS_SUCCESS;
}
enum nss_status _nss_systemd_setgrent(int stayopen) {
enum nss_status ret;
PROTECT_ERRNO;
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
if (userdb_nss_compat_is_enabled() <= 0)
return NSS_STATUS_NOTFOUND;
assert_se(pthread_mutex_lock(&getgrent_data.mutex) == 0);
_cleanup_(pthread_mutex_unlock_assertp) pthread_mutex_t *_l = NULL;
int r;
_l = pthread_mutex_lock_assert(&getgrent_data.mutex);
getgrent_data.iterator = userdb_iterator_free(getgrent_data.iterator);
getpwent_data.by_membership = false;
ret = groupdb_all(nss_glue_userdb_flags(), &getgrent_data.iterator) < 0 ?
NSS_STATUS_UNAVAIL : NSS_STATUS_SUCCESS;
assert_se(pthread_mutex_unlock(&getgrent_data.mutex) == 0);
return ret;
r = groupdb_all(nss_glue_userdb_flags(), &getgrent_data.iterator);
return r < 0 ? NSS_STATUS_UNAVAIL : NSS_STATUS_SUCCESS;
}
enum nss_status _nss_systemd_getpwent_r(
@ -341,7 +339,6 @@ enum nss_status _nss_systemd_getpwent_r(
int *errnop) {
_cleanup_(user_record_unrefp) UserRecord *ur = NULL;
enum nss_status ret;
int r;
PROTECT_ERRNO;
@ -359,40 +356,33 @@ enum nss_status _nss_systemd_getpwent_r(
if (!r)
return NSS_STATUS_NOTFOUND;
assert_se(pthread_mutex_lock(&getpwent_data.mutex) == 0);
_cleanup_(pthread_mutex_unlock_assertp) pthread_mutex_t *_l = NULL;
_l = pthread_mutex_lock_assert(&getpwent_data.mutex);
if (!getpwent_data.iterator) {
UNPROTECT_ERRNO;
*errnop = EHOSTDOWN;
ret = NSS_STATUS_UNAVAIL;
goto finish;
return NSS_STATUS_UNAVAIL;
}
r = userdb_iterator_get(getpwent_data.iterator, &ur);
if (r == -ESRCH) {
ret = NSS_STATUS_NOTFOUND;
goto finish;
}
if (r == -ESRCH)
return NSS_STATUS_NOTFOUND;
if (r < 0) {
UNPROTECT_ERRNO;
*errnop = -r;
ret = NSS_STATUS_UNAVAIL;
goto finish;
return NSS_STATUS_UNAVAIL;
}
r = nss_pack_user_record(ur, result, buffer, buflen);
if (r < 0) {
UNPROTECT_ERRNO;
*errnop = -r;
ret = NSS_STATUS_TRYAGAIN;
goto finish;
return NSS_STATUS_TRYAGAIN;
}
ret = NSS_STATUS_SUCCESS;
finish:
assert_se(pthread_mutex_unlock(&getpwent_data.mutex) == 0);
return ret;
return NSS_STATUS_SUCCESS;
}
enum nss_status _nss_systemd_getgrent_r(
@ -402,7 +392,6 @@ enum nss_status _nss_systemd_getgrent_r(
_cleanup_(group_record_unrefp) GroupRecord *gr = NULL;
_cleanup_free_ char **members = NULL;
enum nss_status ret;
int r;
PROTECT_ERRNO;
@ -420,13 +409,14 @@ enum nss_status _nss_systemd_getgrent_r(
if (!r)
return NSS_STATUS_UNAVAIL;
assert_se(pthread_mutex_lock(&getgrent_data.mutex) == 0);
_cleanup_(pthread_mutex_unlock_assertp) pthread_mutex_t *_l = NULL;
_l = pthread_mutex_lock_assert(&getgrent_data.mutex);
if (!getgrent_data.iterator) {
UNPROTECT_ERRNO;
*errnop = EHOSTDOWN;
ret = NSS_STATUS_UNAVAIL;
goto finish;
return NSS_STATUS_UNAVAIL;
}
if (!getgrent_data.by_membership) {
@ -444,23 +434,20 @@ enum nss_status _nss_systemd_getgrent_r(
if (r < 0) {
UNPROTECT_ERRNO;
*errnop = -r;
ret = NSS_STATUS_UNAVAIL;
goto finish;
return NSS_STATUS_UNAVAIL;
}
getgrent_data.by_membership = true;
} else if (r < 0) {
UNPROTECT_ERRNO;
*errnop = -r;
ret = NSS_STATUS_UNAVAIL;
goto finish;
return NSS_STATUS_UNAVAIL;
} else if (!STR_IN_SET(gr->group_name, root_group.gr_name, nobody_group.gr_name)) {
r = membershipdb_by_group_strv(gr->group_name, nss_glue_userdb_flags(), &members);
if (r < 0) {
UNPROTECT_ERRNO;
*errnop = -r;
ret = NSS_STATUS_UNAVAIL;
goto finish;
return NSS_STATUS_UNAVAIL;
}
}
}
@ -472,15 +459,12 @@ enum nss_status _nss_systemd_getgrent_r(
_cleanup_free_ char *user_name = NULL, *group_name = NULL;
r = membershipdb_iterator_get(getgrent_data.iterator, &user_name, &group_name);
if (r == -ESRCH) {
ret = NSS_STATUS_NOTFOUND;
goto finish;
}
if (r == -ESRCH)
return NSS_STATUS_NOTFOUND;
if (r < 0) {
UNPROTECT_ERRNO;
*errnop = -r;
ret = NSS_STATUS_UNAVAIL;
goto finish;
return NSS_STATUS_UNAVAIL;
}
if (STR_IN_SET(user_name, root_passwd.pw_name, nobody_passwd.pw_name))
@ -494,8 +478,7 @@ enum nss_status _nss_systemd_getgrent_r(
if (lock_fd < 0 && lock_fd != -EBUSY) {
UNPROTECT_ERRNO;
*errnop = -lock_fd;
ret = NSS_STATUS_UNAVAIL;
goto finish;
return NSS_STATUS_UNAVAIL;
}
}
@ -511,8 +494,7 @@ enum nss_status _nss_systemd_getgrent_r(
if (!members) {
UNPROTECT_ERRNO;
*errnop = ENOMEM;
ret = NSS_STATUS_TRYAGAIN;
goto finish;
return NSS_STATUS_TRYAGAIN;
}
/* Note that we currently generate one group entry per user that is part of a
@ -526,15 +508,10 @@ enum nss_status _nss_systemd_getgrent_r(
if (r < 0) {
UNPROTECT_ERRNO;
*errnop = -r;
ret = NSS_STATUS_TRYAGAIN;
goto finish;
return NSS_STATUS_TRYAGAIN;
}
ret = NSS_STATUS_SUCCESS;
finish:
assert_se(pthread_mutex_unlock(&getgrent_data.mutex) == 0);
return ret;
return NSS_STATUS_SUCCESS;
}
enum nss_status _nss_systemd_initgroups_dyn(