836 lines
26 KiB
C
836 lines
26 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <nss.h>
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#include <pthread.h>
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#include "sd-bus.h"
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#include "alloc-util.h"
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#include "bus-common-errors.h"
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#include "dirent-util.h"
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#include "env-util.h"
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#include "fd-util.h"
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#include "format-util.h"
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#include "fs-util.h"
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#include "list.h"
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#include "macro.h"
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#include "nss-util.h"
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#include "signal-util.h"
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#include "stdio-util.h"
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#include "string-util.h"
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#include "user-util.h"
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#include "util.h"
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#define DYNAMIC_USER_GECOS "Dynamic User"
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#define DYNAMIC_USER_PASSWD "*" /* locked */
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#define DYNAMIC_USER_DIR "/"
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#define DYNAMIC_USER_SHELL "/sbin/nologin"
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static const struct passwd root_passwd = {
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.pw_name = (char*) "root",
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.pw_passwd = (char*) "x", /* see shadow file */
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.pw_uid = 0,
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.pw_gid = 0,
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.pw_gecos = (char*) "Super User",
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.pw_dir = (char*) "/root",
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.pw_shell = (char*) "/bin/sh",
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};
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static const struct passwd nobody_passwd = {
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.pw_name = (char*) NOBODY_USER_NAME,
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.pw_passwd = (char*) "*", /* locked */
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.pw_uid = UID_NOBODY,
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.pw_gid = GID_NOBODY,
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.pw_gecos = (char*) "User Nobody",
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.pw_dir = (char*) "/",
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.pw_shell = (char*) "/sbin/nologin",
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};
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static const struct group root_group = {
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.gr_name = (char*) "root",
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.gr_gid = 0,
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.gr_passwd = (char*) "x", /* see shadow file */
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.gr_mem = (char*[]) { NULL },
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};
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static const struct group nobody_group = {
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.gr_name = (char*) NOBODY_GROUP_NAME,
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.gr_gid = GID_NOBODY,
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.gr_passwd = (char*) "*", /* locked */
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.gr_mem = (char*[]) { NULL },
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};
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typedef struct UserEntry UserEntry;
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typedef struct GetentData GetentData;
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struct UserEntry {
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uid_t id;
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char *name;
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GetentData *data;
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LIST_FIELDS(UserEntry, entries);
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};
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struct GetentData {
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/* As explained in NOTES section of getpwent_r(3) as 'getpwent_r() is not really
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* reentrant since it shares the reading position in the stream with all other threads',
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* we need to protect the data in UserEntry from multithreaded programs which may call
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* setpwent(), getpwent_r(), or endpwent() simultaneously. So, each function locks the
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* data by using the mutex below. */
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pthread_mutex_t mutex;
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UserEntry *position;
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LIST_HEAD(UserEntry, entries);
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};
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static GetentData getpwent_data = { PTHREAD_MUTEX_INITIALIZER, NULL, NULL };
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static GetentData getgrent_data = { PTHREAD_MUTEX_INITIALIZER, NULL, NULL };
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NSS_GETPW_PROTOTYPES(systemd);
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NSS_GETGR_PROTOTYPES(systemd);
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enum nss_status _nss_systemd_endpwent(void) _public_;
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enum nss_status _nss_systemd_setpwent(int stayopen) _public_;
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enum nss_status _nss_systemd_getpwent_r(struct passwd *result, char *buffer, size_t buflen, int *errnop) _public_;
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enum nss_status _nss_systemd_endgrent(void) _public_;
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enum nss_status _nss_systemd_setgrent(int stayopen) _public_;
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enum nss_status _nss_systemd_getgrent_r(struct group *result, char *buffer, size_t buflen, int *errnop) _public_;
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static int direct_lookup_name(const char *name, uid_t *ret) {
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_cleanup_free_ char *s = NULL;
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const char *path;
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int r;
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assert(name);
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/* Normally, we go via the bus to resolve names. That has the benefit that it is available from any mount
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* namespace and subject to proper authentication. However, there's one problem: if our module is called from
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* dbus-daemon itself we really can't use D-Bus to communicate. In this case, resort to a client-side hack,
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* and look for the dynamic names directly. This is pretty ugly, but breaks the cyclic dependency. */
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path = strjoina("/run/systemd/dynamic-uid/direct:", name);
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r = readlink_malloc(path, &s);
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if (r < 0)
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return r;
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return parse_uid(s, ret);
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}
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static int direct_lookup_uid(uid_t uid, char **ret) {
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char path[STRLEN("/run/systemd/dynamic-uid/direct:") + DECIMAL_STR_MAX(uid_t) + 1], *s;
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int r;
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xsprintf(path, "/run/systemd/dynamic-uid/direct:" UID_FMT, uid);
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r = readlink_malloc(path, &s);
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if (r < 0)
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return r;
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if (!valid_user_group_name(s)) { /* extra safety check */
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free(s);
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return -EINVAL;
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}
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*ret = s;
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return 0;
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}
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enum nss_status _nss_systemd_getpwnam_r(
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const char *name,
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struct passwd *pwd,
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char *buffer, size_t buflen,
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int *errnop) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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_cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL;
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_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
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uint32_t translated;
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size_t l;
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int bypass, r;
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PROTECT_ERRNO;
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BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
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assert(name);
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assert(pwd);
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/* If the username is not valid, then we don't know it. Ideally libc would filter these for us anyway. We don't
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* generate EINVAL here, because it isn't really out business to complain about invalid user names. */
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if (!valid_user_group_name(name))
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return NSS_STATUS_NOTFOUND;
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/* Synthesize entries for the root and nobody users, in case they are missing in /etc/passwd */
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if (getenv_bool_secure("SYSTEMD_NSS_BYPASS_SYNTHETIC") <= 0) {
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if (streq(name, root_passwd.pw_name)) {
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*pwd = root_passwd;
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return NSS_STATUS_SUCCESS;
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}
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if (synthesize_nobody() &&
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streq(name, nobody_passwd.pw_name)) {
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*pwd = nobody_passwd;
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return NSS_STATUS_SUCCESS;
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}
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}
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/* Make sure that we don't go in circles when allocating a dynamic UID by checking our own database */
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if (getenv_bool_secure("SYSTEMD_NSS_DYNAMIC_BYPASS") > 0)
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return NSS_STATUS_NOTFOUND;
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bypass = getenv_bool_secure("SYSTEMD_NSS_BYPASS_BUS");
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if (bypass <= 0) {
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r = sd_bus_open_system(&bus);
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if (r < 0)
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bypass = 1;
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}
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if (bypass > 0) {
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r = direct_lookup_name(name, (uid_t*) &translated);
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if (r == -ENOENT)
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return NSS_STATUS_NOTFOUND;
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if (r < 0)
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goto fail;
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} else {
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r = sd_bus_call_method(bus,
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"org.freedesktop.systemd1",
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"/org/freedesktop/systemd1",
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"org.freedesktop.systemd1.Manager",
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"LookupDynamicUserByName",
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&error,
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&reply,
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"s",
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name);
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if (r < 0) {
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if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_DYNAMIC_USER))
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return NSS_STATUS_NOTFOUND;
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goto fail;
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}
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r = sd_bus_message_read(reply, "u", &translated);
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if (r < 0)
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goto fail;
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}
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l = strlen(name);
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if (buflen < l+1) {
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UNPROTECT_ERRNO;
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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memcpy(buffer, name, l+1);
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pwd->pw_name = buffer;
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pwd->pw_uid = (uid_t) translated;
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pwd->pw_gid = (uid_t) translated;
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pwd->pw_gecos = (char*) DYNAMIC_USER_GECOS;
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pwd->pw_passwd = (char*) DYNAMIC_USER_PASSWD;
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pwd->pw_dir = (char*) DYNAMIC_USER_DIR;
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pwd->pw_shell = (char*) DYNAMIC_USER_SHELL;
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return NSS_STATUS_SUCCESS;
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fail:
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UNPROTECT_ERRNO;
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*errnop = -r;
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return NSS_STATUS_UNAVAIL;
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}
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enum nss_status _nss_systemd_getpwuid_r(
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uid_t uid,
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struct passwd *pwd,
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char *buffer, size_t buflen,
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int *errnop) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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_cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL;
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_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
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_cleanup_free_ char *direct = NULL;
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const char *translated;
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size_t l;
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int bypass, r;
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PROTECT_ERRNO;
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BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
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if (!uid_is_valid(uid))
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return NSS_STATUS_NOTFOUND;
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/* Synthesize data for the root user and for nobody in case they are missing from /etc/passwd */
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if (getenv_bool_secure("SYSTEMD_NSS_BYPASS_SYNTHETIC") <= 0) {
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if (uid == root_passwd.pw_uid) {
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*pwd = root_passwd;
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return NSS_STATUS_SUCCESS;
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}
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if (synthesize_nobody() &&
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uid == nobody_passwd.pw_uid) {
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*pwd = nobody_passwd;
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return NSS_STATUS_SUCCESS;
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}
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}
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if (!uid_is_dynamic(uid))
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return NSS_STATUS_NOTFOUND;
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if (getenv_bool_secure("SYSTEMD_NSS_DYNAMIC_BYPASS") > 0)
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return NSS_STATUS_NOTFOUND;
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bypass = getenv_bool_secure("SYSTEMD_NSS_BYPASS_BUS");
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if (bypass <= 0) {
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r = sd_bus_open_system(&bus);
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if (r < 0)
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bypass = 1;
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}
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if (bypass > 0) {
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r = direct_lookup_uid(uid, &direct);
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if (r == -ENOENT)
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return NSS_STATUS_NOTFOUND;
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if (r < 0)
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goto fail;
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translated = direct;
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} else {
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r = sd_bus_call_method(bus,
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"org.freedesktop.systemd1",
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"/org/freedesktop/systemd1",
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"org.freedesktop.systemd1.Manager",
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"LookupDynamicUserByUID",
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&error,
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&reply,
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"u",
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(uint32_t) uid);
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if (r < 0) {
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if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_DYNAMIC_USER))
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return NSS_STATUS_NOTFOUND;
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goto fail;
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}
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r = sd_bus_message_read(reply, "s", &translated);
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if (r < 0)
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goto fail;
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}
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l = strlen(translated) + 1;
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if (buflen < l) {
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UNPROTECT_ERRNO;
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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memcpy(buffer, translated, l);
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pwd->pw_name = buffer;
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pwd->pw_uid = uid;
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pwd->pw_gid = uid;
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pwd->pw_gecos = (char*) DYNAMIC_USER_GECOS;
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pwd->pw_passwd = (char*) DYNAMIC_USER_PASSWD;
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pwd->pw_dir = (char*) DYNAMIC_USER_DIR;
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pwd->pw_shell = (char*) DYNAMIC_USER_SHELL;
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return NSS_STATUS_SUCCESS;
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fail:
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UNPROTECT_ERRNO;
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*errnop = -r;
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return NSS_STATUS_UNAVAIL;
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}
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#pragma GCC diagnostic ignored "-Wsizeof-pointer-memaccess"
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|
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enum nss_status _nss_systemd_getgrnam_r(
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const char *name,
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struct group *gr,
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char *buffer, size_t buflen,
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int *errnop) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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_cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL;
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_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
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uint32_t translated;
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size_t l;
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int bypass, r;
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PROTECT_ERRNO;
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BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
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assert(name);
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assert(gr);
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if (!valid_user_group_name(name))
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return NSS_STATUS_NOTFOUND;
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|
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/* Synthesize records for root and nobody, in case they are missing form /etc/group */
|
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if (getenv_bool_secure("SYSTEMD_NSS_BYPASS_SYNTHETIC") <= 0) {
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if (streq(name, root_group.gr_name)) {
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*gr = root_group;
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return NSS_STATUS_SUCCESS;
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}
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if (synthesize_nobody() &&
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streq(name, nobody_group.gr_name)) {
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*gr = nobody_group;
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return NSS_STATUS_SUCCESS;
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}
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}
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|
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if (getenv_bool_secure("SYSTEMD_NSS_DYNAMIC_BYPASS") > 0)
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return NSS_STATUS_NOTFOUND;
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|
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bypass = getenv_bool_secure("SYSTEMD_NSS_BYPASS_BUS");
|
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if (bypass <= 0) {
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r = sd_bus_open_system(&bus);
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if (r < 0)
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bypass = 1;
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}
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|
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if (bypass > 0) {
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r = direct_lookup_name(name, (uid_t*) &translated);
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if (r == -ENOENT)
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return NSS_STATUS_NOTFOUND;
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if (r < 0)
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goto fail;
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} else {
|
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r = sd_bus_call_method(bus,
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"org.freedesktop.systemd1",
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"/org/freedesktop/systemd1",
|
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"org.freedesktop.systemd1.Manager",
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"LookupDynamicUserByName",
|
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&error,
|
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&reply,
|
|
"s",
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name);
|
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if (r < 0) {
|
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if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_DYNAMIC_USER))
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return NSS_STATUS_NOTFOUND;
|
|
|
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goto fail;
|
|
}
|
|
|
|
r = sd_bus_message_read(reply, "u", &translated);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
l = sizeof(char*) + strlen(name) + 1;
|
|
if (buflen < l) {
|
|
UNPROTECT_ERRNO;
|
|
*errnop = ERANGE;
|
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return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
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memzero(buffer, sizeof(char*));
|
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strcpy(buffer + sizeof(char*), name);
|
|
|
|
gr->gr_name = buffer + sizeof(char*);
|
|
gr->gr_gid = (gid_t) translated;
|
|
gr->gr_passwd = (char*) DYNAMIC_USER_PASSWD;
|
|
gr->gr_mem = (char**) buffer;
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
|
|
fail:
|
|
UNPROTECT_ERRNO;
|
|
*errnop = -r;
|
|
return NSS_STATUS_UNAVAIL;
|
|
}
|
|
|
|
enum nss_status _nss_systemd_getgrgid_r(
|
|
gid_t gid,
|
|
struct group *gr,
|
|
char *buffer, size_t buflen,
|
|
int *errnop) {
|
|
|
|
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL;
|
|
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
|
|
_cleanup_free_ char *direct = NULL;
|
|
const char *translated;
|
|
size_t l;
|
|
int bypass, r;
|
|
|
|
PROTECT_ERRNO;
|
|
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
|
|
|
|
if (!gid_is_valid(gid))
|
|
return NSS_STATUS_NOTFOUND;
|
|
|
|
/* Synthesize records for root and nobody, in case they are missing from /etc/group */
|
|
if (getenv_bool_secure("SYSTEMD_NSS_BYPASS_SYNTHETIC") <= 0) {
|
|
if (gid == root_group.gr_gid) {
|
|
*gr = root_group;
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
if (synthesize_nobody() &&
|
|
gid == nobody_group.gr_gid) {
|
|
*gr = nobody_group;
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
}
|
|
|
|
if (!gid_is_dynamic(gid))
|
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return NSS_STATUS_NOTFOUND;
|
|
|
|
if (getenv_bool_secure("SYSTEMD_NSS_DYNAMIC_BYPASS") > 0)
|
|
return NSS_STATUS_NOTFOUND;
|
|
|
|
bypass = getenv_bool_secure("SYSTEMD_NSS_BYPASS_BUS");
|
|
if (bypass <= 0) {
|
|
r = sd_bus_open_system(&bus);
|
|
if (r < 0)
|
|
bypass = 1;
|
|
}
|
|
|
|
if (bypass > 0) {
|
|
r = direct_lookup_uid(gid, &direct);
|
|
if (r == -ENOENT)
|
|
return NSS_STATUS_NOTFOUND;
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
translated = direct;
|
|
|
|
} else {
|
|
r = sd_bus_call_method(bus,
|
|
"org.freedesktop.systemd1",
|
|
"/org/freedesktop/systemd1",
|
|
"org.freedesktop.systemd1.Manager",
|
|
"LookupDynamicUserByUID",
|
|
&error,
|
|
&reply,
|
|
"u",
|
|
(uint32_t) gid);
|
|
if (r < 0) {
|
|
if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_DYNAMIC_USER))
|
|
return NSS_STATUS_NOTFOUND;
|
|
|
|
goto fail;
|
|
}
|
|
|
|
r = sd_bus_message_read(reply, "s", &translated);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
l = sizeof(char*) + strlen(translated) + 1;
|
|
if (buflen < l) {
|
|
UNPROTECT_ERRNO;
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
memzero(buffer, sizeof(char*));
|
|
strcpy(buffer + sizeof(char*), translated);
|
|
|
|
gr->gr_name = buffer + sizeof(char*);
|
|
gr->gr_gid = gid;
|
|
gr->gr_passwd = (char*) DYNAMIC_USER_PASSWD;
|
|
gr->gr_mem = (char**) buffer;
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
|
|
fail:
|
|
UNPROTECT_ERRNO;
|
|
*errnop = -r;
|
|
return NSS_STATUS_UNAVAIL;
|
|
}
|
|
|
|
static void user_entry_free(UserEntry *p) {
|
|
if (!p)
|
|
return;
|
|
|
|
if (p->data)
|
|
LIST_REMOVE(entries, p->data->entries, p);
|
|
|
|
free(p->name);
|
|
free(p);
|
|
}
|
|
|
|
static int user_entry_add(GetentData *data, const char *name, uid_t id) {
|
|
UserEntry *p;
|
|
|
|
assert(data);
|
|
|
|
/* This happens when User= or Group= already exists statically. */
|
|
if (!uid_is_dynamic(id))
|
|
return -EINVAL;
|
|
|
|
p = new0(UserEntry, 1);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
p->name = strdup(name);
|
|
if (!p->name) {
|
|
free(p);
|
|
return -ENOMEM;
|
|
}
|
|
p->id = id;
|
|
p->data = data;
|
|
|
|
LIST_PREPEND(entries, data->entries, p);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void systemd_endent(GetentData *data) {
|
|
UserEntry *p;
|
|
|
|
assert(data);
|
|
|
|
while ((p = data->entries))
|
|
user_entry_free(p);
|
|
|
|
data->position = NULL;
|
|
}
|
|
|
|
static enum nss_status nss_systemd_endent(GetentData *p) {
|
|
PROTECT_ERRNO;
|
|
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
|
|
|
|
assert_se(pthread_mutex_lock(&p->mutex) == 0);
|
|
systemd_endent(p);
|
|
assert_se(pthread_mutex_unlock(&p->mutex) == 0);
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
enum nss_status _nss_systemd_endpwent(void) {
|
|
return nss_systemd_endent(&getpwent_data);
|
|
}
|
|
|
|
enum nss_status _nss_systemd_endgrent(void) {
|
|
return nss_systemd_endent(&getgrent_data);
|
|
}
|
|
|
|
static int direct_enumeration(GetentData *p) {
|
|
_cleanup_closedir_ DIR *d = NULL;
|
|
struct dirent *de;
|
|
int r;
|
|
|
|
assert(p);
|
|
|
|
d = opendir("/run/systemd/dynamic-uid/");
|
|
if (!d)
|
|
return -errno;
|
|
|
|
FOREACH_DIRENT(de, d, return -errno) {
|
|
_cleanup_free_ char *name = NULL;
|
|
uid_t uid, verified;
|
|
|
|
if (!dirent_is_file(de))
|
|
continue;
|
|
|
|
r = parse_uid(de->d_name, &uid);
|
|
if (r < 0)
|
|
continue;
|
|
|
|
r = direct_lookup_uid(uid, &name);
|
|
if (r == -ENOMEM)
|
|
return r;
|
|
if (r < 0)
|
|
continue;
|
|
|
|
r = direct_lookup_name(name, &verified);
|
|
if (r < 0)
|
|
continue;
|
|
|
|
if (uid != verified)
|
|
continue;
|
|
|
|
r = user_entry_add(p, name, uid);
|
|
if (r == -ENOMEM)
|
|
return r;
|
|
if (r < 0)
|
|
continue;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum nss_status systemd_setent(GetentData *p) {
|
|
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL;
|
|
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
|
|
const char *name;
|
|
uid_t id;
|
|
int bypass, r;
|
|
|
|
PROTECT_ERRNO;
|
|
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
|
|
|
|
assert(p);
|
|
|
|
assert_se(pthread_mutex_lock(&p->mutex) == 0);
|
|
|
|
systemd_endent(p);
|
|
|
|
if (getenv_bool_secure("SYSTEMD_NSS_DYNAMIC_BYPASS") > 0)
|
|
goto finish;
|
|
|
|
bypass = getenv_bool_secure("SYSTEMD_NSS_BYPASS_BUS");
|
|
|
|
if (bypass <= 0) {
|
|
r = sd_bus_open_system(&bus);
|
|
if (r < 0)
|
|
bypass = 1;
|
|
}
|
|
|
|
if (bypass > 0) {
|
|
r = direct_enumeration(p);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
goto finish;
|
|
}
|
|
|
|
r = sd_bus_call_method(bus,
|
|
"org.freedesktop.systemd1",
|
|
"/org/freedesktop/systemd1",
|
|
"org.freedesktop.systemd1.Manager",
|
|
"GetDynamicUsers",
|
|
&error,
|
|
&reply,
|
|
NULL);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = sd_bus_message_enter_container(reply, 'a', "(us)");
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
while ((r = sd_bus_message_read(reply, "(us)", &id, &name)) > 0) {
|
|
r = user_entry_add(p, name, id);
|
|
if (r == -ENOMEM)
|
|
goto fail;
|
|
if (r < 0)
|
|
continue;
|
|
}
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = sd_bus_message_exit_container(reply);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
finish:
|
|
p->position = p->entries;
|
|
assert_se(pthread_mutex_unlock(&p->mutex) == 0);
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
|
|
fail:
|
|
systemd_endent(p);
|
|
assert_se(pthread_mutex_unlock(&p->mutex) == 0);
|
|
|
|
return NSS_STATUS_UNAVAIL;
|
|
}
|
|
|
|
enum nss_status _nss_systemd_setpwent(int stayopen) {
|
|
return systemd_setent(&getpwent_data);
|
|
}
|
|
|
|
enum nss_status _nss_systemd_setgrent(int stayopen) {
|
|
return systemd_setent(&getgrent_data);
|
|
}
|
|
|
|
enum nss_status _nss_systemd_getpwent_r(struct passwd *result, char *buffer, size_t buflen, int *errnop) {
|
|
enum nss_status ret;
|
|
UserEntry *p;
|
|
size_t len;
|
|
|
|
PROTECT_ERRNO;
|
|
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
|
|
|
|
assert(result);
|
|
assert(buffer);
|
|
assert(errnop);
|
|
|
|
assert_se(pthread_mutex_lock(&getpwent_data.mutex) == 0);
|
|
|
|
LIST_FOREACH(entries, p, getpwent_data.position) {
|
|
len = strlen(p->name) + 1;
|
|
if (buflen < len) {
|
|
UNPROTECT_ERRNO;
|
|
*errnop = ERANGE;
|
|
ret = NSS_STATUS_TRYAGAIN;
|
|
goto finalize;
|
|
}
|
|
|
|
memcpy(buffer, p->name, len);
|
|
|
|
result->pw_name = buffer;
|
|
result->pw_uid = p->id;
|
|
result->pw_gid = p->id;
|
|
result->pw_gecos = (char*) DYNAMIC_USER_GECOS;
|
|
result->pw_passwd = (char*) DYNAMIC_USER_PASSWD;
|
|
result->pw_dir = (char*) DYNAMIC_USER_DIR;
|
|
result->pw_shell = (char*) DYNAMIC_USER_SHELL;
|
|
break;
|
|
}
|
|
if (!p) {
|
|
ret = NSS_STATUS_NOTFOUND;
|
|
goto finalize;
|
|
}
|
|
|
|
/* On success, step to the next entry. */
|
|
p = p->entries_next;
|
|
ret = NSS_STATUS_SUCCESS;
|
|
|
|
finalize:
|
|
/* Save position for the next call. */
|
|
getpwent_data.position = p;
|
|
|
|
assert_se(pthread_mutex_unlock(&getpwent_data.mutex) == 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
enum nss_status _nss_systemd_getgrent_r(struct group *result, char *buffer, size_t buflen, int *errnop) {
|
|
enum nss_status ret;
|
|
UserEntry *p;
|
|
size_t len;
|
|
|
|
PROTECT_ERRNO;
|
|
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
|
|
|
|
assert(result);
|
|
assert(buffer);
|
|
assert(errnop);
|
|
|
|
assert_se(pthread_mutex_lock(&getgrent_data.mutex) == 0);
|
|
|
|
LIST_FOREACH(entries, p, getgrent_data.position) {
|
|
len = sizeof(char*) + strlen(p->name) + 1;
|
|
if (buflen < len) {
|
|
UNPROTECT_ERRNO;
|
|
*errnop = ERANGE;
|
|
ret = NSS_STATUS_TRYAGAIN;
|
|
goto finalize;
|
|
}
|
|
|
|
memzero(buffer, sizeof(char*));
|
|
strcpy(buffer + sizeof(char*), p->name);
|
|
|
|
result->gr_name = buffer + sizeof(char*);
|
|
result->gr_gid = p->id;
|
|
result->gr_passwd = (char*) DYNAMIC_USER_PASSWD;
|
|
result->gr_mem = (char**) buffer;
|
|
break;
|
|
}
|
|
if (!p) {
|
|
ret = NSS_STATUS_NOTFOUND;
|
|
goto finalize;
|
|
}
|
|
|
|
/* On success, step to the next entry. */
|
|
p = p->entries_next;
|
|
ret = NSS_STATUS_SUCCESS;
|
|
|
|
finalize:
|
|
/* Save position for the next call. */
|
|
getgrent_data.position = p;
|
|
|
|
assert_se(pthread_mutex_unlock(&getgrent_data.mutex) == 0);
|
|
|
|
return ret;
|
|
}
|