summaryrefslogtreecommitdiffstats
path: root/python/guestfs-py.c
diff options
context:
space:
mode:
authorRichard W.M. Jones <rjones@redhat.com>2009-06-29 11:47:07 +0100
committerRichard W.M. Jones <rjones@redhat.com>2009-06-29 11:47:07 +0100
commit826020fe18bf2eee43f8afea392874bb88c0650a (patch)
tree7c6c40758611605be29b3528da647a78a071ea1b /python/guestfs-py.c
parent3854bbdecd1c089959fb812a739b84a96c05fbbf (diff)
downloadlibguestfs-826020fe18bf2eee43f8afea392874bb88c0650a.tar.gz
libguestfs-826020fe18bf2eee43f8afea392874bb88c0650a.tar.xz
libguestfs-826020fe18bf2eee43f8afea392874bb88c0650a.zip
Generated code for head/tail commands.
Diffstat (limited to 'python/guestfs-py.c')
-rw-r--r--python/guestfs-py.c112
1 files changed, 109 insertions, 3 deletions
diff --git a/python/guestfs-py.c b/python/guestfs-py.c
index 07f3c460..7d28af43 100644
--- a/python/guestfs-py.c
+++ b/python/guestfs-py.c
@@ -4153,18 +4153,18 @@ py_guestfs_sfdisk_N (PyObject *self, PyObject *args)
PyObject *py_r;
int r;
const char *device;
- int n;
+ int partnum;
int cyls;
int heads;
int sectors;
const char *line;
if (!PyArg_ParseTuple (args, (char *) "Osiiiis:guestfs_sfdisk_N",
- &py_g, &device, &n, &cyls, &heads, &sectors, &line))
+ &py_g, &device, &partnum, &cyls, &heads, &sectors, &line))
return NULL;
g = get_handle (py_g);
- r = guestfs_sfdisk_N (g, device, n, cyls, heads, sectors, line);
+ r = guestfs_sfdisk_N (g, device, partnum, cyls, heads, sectors, line);
if (r == -1) {
PyErr_SetString (PyExc_RuntimeError, guestfs_last_error (g));
return NULL;
@@ -4703,6 +4703,108 @@ py_guestfs_wc_c (PyObject *self, PyObject *args)
return py_r;
}
+static PyObject *
+py_guestfs_head (PyObject *self, PyObject *args)
+{
+ PyObject *py_g;
+ guestfs_h *g;
+ PyObject *py_r;
+ char **r;
+ const char *path;
+
+ if (!PyArg_ParseTuple (args, (char *) "Os:guestfs_head",
+ &py_g, &path))
+ return NULL;
+ g = get_handle (py_g);
+
+ r = guestfs_head (g, path);
+ if (r == NULL) {
+ PyErr_SetString (PyExc_RuntimeError, guestfs_last_error (g));
+ return NULL;
+ }
+
+ py_r = put_string_list (r);
+ free_strings (r);
+ return py_r;
+}
+
+static PyObject *
+py_guestfs_head_n (PyObject *self, PyObject *args)
+{
+ PyObject *py_g;
+ guestfs_h *g;
+ PyObject *py_r;
+ char **r;
+ int nrlines;
+ const char *path;
+
+ if (!PyArg_ParseTuple (args, (char *) "Ois:guestfs_head_n",
+ &py_g, &nrlines, &path))
+ return NULL;
+ g = get_handle (py_g);
+
+ r = guestfs_head_n (g, nrlines, path);
+ if (r == NULL) {
+ PyErr_SetString (PyExc_RuntimeError, guestfs_last_error (g));
+ return NULL;
+ }
+
+ py_r = put_string_list (r);
+ free_strings (r);
+ return py_r;
+}
+
+static PyObject *
+py_guestfs_tail (PyObject *self, PyObject *args)
+{
+ PyObject *py_g;
+ guestfs_h *g;
+ PyObject *py_r;
+ char **r;
+ const char *path;
+
+ if (!PyArg_ParseTuple (args, (char *) "Os:guestfs_tail",
+ &py_g, &path))
+ return NULL;
+ g = get_handle (py_g);
+
+ r = guestfs_tail (g, path);
+ if (r == NULL) {
+ PyErr_SetString (PyExc_RuntimeError, guestfs_last_error (g));
+ return NULL;
+ }
+
+ py_r = put_string_list (r);
+ free_strings (r);
+ return py_r;
+}
+
+static PyObject *
+py_guestfs_tail_n (PyObject *self, PyObject *args)
+{
+ PyObject *py_g;
+ guestfs_h *g;
+ PyObject *py_r;
+ char **r;
+ int nrlines;
+ const char *path;
+
+ if (!PyArg_ParseTuple (args, (char *) "Ois:guestfs_tail_n",
+ &py_g, &nrlines, &path))
+ return NULL;
+ g = get_handle (py_g);
+
+ r = guestfs_tail_n (g, nrlines, path);
+ if (r == NULL) {
+ PyErr_SetString (PyExc_RuntimeError, guestfs_last_error (g));
+ return NULL;
+ }
+
+ py_r = put_string_list (r);
+ free_strings (r);
+ return py_r;
+}
+
static PyMethodDef methods[] = {
{ (char *) "create", py_guestfs_create, METH_VARARGS, NULL },
{ (char *) "close", py_guestfs_close, METH_VARARGS, NULL },
@@ -4878,6 +4980,10 @@ static PyMethodDef methods[] = {
{ (char *) "wc_l", py_guestfs_wc_l, METH_VARARGS, NULL },
{ (char *) "wc_w", py_guestfs_wc_w, METH_VARARGS, NULL },
{ (char *) "wc_c", py_guestfs_wc_c, METH_VARARGS, NULL },
+ { (char *) "head", py_guestfs_head, METH_VARARGS, NULL },
+ { (char *) "head_n", py_guestfs_head_n, METH_VARARGS, NULL },
+ { (char *) "tail", py_guestfs_tail, METH_VARARGS, NULL },
+ { (char *) "tail_n", py_guestfs_tail_n, METH_VARARGS, NULL },
{ NULL, NULL, 0, NULL }
};
345'>345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063
/*
    SSSD

    nsssrv_netgroup.c

    Authors:
        Stephen Gallagher <sgallagh@redhat.com>

    Copyright (C) 2010 Red Hat

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/


#include "util/util.h"
#include "responder/nss/nsssrv.h"
#include "responder/nss/nsssrv_private.h"
#include "responder/nss/nsssrv_netgroup.h"
#include "responder/common/negcache.h"
#include "confdb/confdb.h"
#include "db/sysdb.h"

static errno_t get_netgroup_entry(struct nss_ctx *nctx,
                                  char *name,
                                  struct getent_ctx **netgr)
{
    hash_key_t key;
    hash_value_t value;
    int hret;

    key.type = HASH_KEY_STRING;
    key.str = name;

    hret = hash_lookup(nctx->netgroups, &key, &value);
    if (hret == HASH_SUCCESS) {
        *netgr = talloc_get_type(value.ptr, struct getent_ctx);
        return EOK;
    } else if (hret == HASH_ERROR_KEY_NOT_FOUND) {
        return ENOENT;
    }

    DEBUG(1, ("Unexpected error reading from netgroup hash [%d][%s]\n",
              hret, hash_error_string(hret)));
    return EIO;
}

static int netgr_hash_remove (TALLOC_CTX *ctx);
static errno_t set_netgroup_entry(struct nss_ctx *nctx,
                                  struct getent_ctx *netgr)
{
    hash_key_t key;
    hash_value_t value;
    int hret;

    if (netgr->name == NULL) {
        DEBUG(1, ("Missing netgroup name.\n"));
        return EINVAL;
    }
    /* Add this entry to the hash table */
    key.type = HASH_KEY_STRING;
    key.str = netgr->name;
    value.type = HASH_VALUE_PTR;
    value.ptr = netgr;
    hret = hash_enter(nctx->netgroups, &key, &value);
    if (hret != EOK) {
        DEBUG(0, ("Unable to add hash table entry for [%s]", key.str));
        DEBUG(4, ("Hash error [%d][%s]", hret, hash_error_string(hret)));
        return EIO;
    }
    talloc_steal(nctx->netgroups, netgr);
    talloc_set_destructor((TALLOC_CTX *) netgr, netgr_hash_remove);

    return EOK;
}

static struct tevent_req *setnetgrent_send(TALLOC_CTX *mem_ctx,
                                           const char *rawname,
                                           struct nss_cmd_ctx *cmdctx);
static void nss_cmd_setnetgrent_done(struct tevent_req *req);
int nss_cmd_setnetgrent(struct cli_ctx *client)
{
    struct nss_cmd_ctx *cmdctx;
    struct tevent_req *req;
    const char *rawname;
    uint8_t *body;
    size_t blen;
    errno_t ret = EOK;

    /* Reset the result cursor to zero */
    client->netgrent_cur = 0;

    cmdctx = talloc_zero(client, struct nss_cmd_ctx);
    if (!cmdctx) {
        return ENOMEM;
    }
    cmdctx->cctx = client;

    /* get netgroup name to query */
    sss_packet_get_body(client->creq->in, &body, &blen);

    /* if not terminated fail */
    if (body[blen -1] != '\0') {
        ret = EINVAL;
        goto done;
    }

    /* If the body isn't valid UTF-8, fail */
    if (!sss_utf8_check(body, blen -1)) {
        ret = EINVAL;
        goto done;
    }

    rawname = (const char *)body;

    req = setnetgrent_send(cmdctx, rawname, cmdctx);
    if (!req) {
        DEBUG(0, ("Fatal error calling setnetgrent_send\n"));
        ret = EIO;
        goto done;
    }
    tevent_req_set_callback(req, nss_cmd_setnetgrent_done, cmdctx);

done:
    return nss_cmd_done(cmdctx, ret);
}

static int netgr_hash_remove (TALLOC_CTX *ctx)
{
    int hret;
    hash_key_t key;
    struct getent_ctx *netgr =
            talloc_get_type(ctx, struct getent_ctx);

    if (netgr->lookup_table == NULL) {
        DEBUG(SSSDBG_TRACE_LIBS, ("netgroup [%s] was already removed\n",
                                  netgr->name));
        return EOK;
    }

    key.type = HASH_KEY_STRING;
    key.str = netgr->name;

    /* Remove the netgroup result object from the lookup table */
    hret = hash_delete(netgr->lookup_table, &key);
    if (hret != HASH_SUCCESS) {
        DEBUG(0, ("Could not remove key [%s] from table! [%d][%s]\n",
                  netgr->name, hret, hash_error_string(hret)));
        return -1;
    }
    return 0;
}

struct setnetgrent_ctx {
    struct nss_ctx *nctx;
    struct nss_cmd_ctx *cmdctx;
    struct nss_dom_ctx *dctx;
    char *netgr_shortname;
    struct getent_ctx *netgr;
    const char *rawname;
};
static errno_t setnetgrent_retry(struct tevent_req *req);
static errno_t lookup_netgr_step(struct setent_step_ctx *step_ctx);
static struct tevent_req *setnetgrent_send(TALLOC_CTX *mem_ctx,
                                           const char *rawname,
                                           struct nss_cmd_ctx *cmdctx)
{
    char *domname;
    errno_t ret;
    struct tevent_req *req;
    struct setnetgrent_ctx *state;
    struct nss_dom_ctx *dctx;

    struct cli_ctx *client = cmdctx->cctx;
    struct nss_ctx *nctx =
            talloc_get_type(client->rctx->pvt_ctx, struct nss_ctx);

    req = tevent_req_create(mem_ctx, &state, struct setnetgrent_ctx);
    if (!req) {
        DEBUG(0, ("Could not create tevent request for setnetgrent\n"));
        return NULL;
    }

    state->nctx = nctx;
    state->cmdctx = cmdctx;
    state->rawname = rawname;

    state->dctx = talloc_zero(state, struct nss_dom_ctx);
    if (!state->dctx) {
        ret = ENOMEM;
        goto error;
    }
    dctx = state->dctx;
    dctx->cmdctx = state->cmdctx;

    ret = sss_parse_name_for_domains(state, client->rctx->domains,
                                     client->rctx->default_domain, rawname,
                                     &domname, &state->netgr_shortname);
    if (ret != EOK) {
        DEBUG(2, ("Invalid name received [%s]\n", rawname));
        goto error;
    }

    DEBUG(4, ("Requesting info for netgroup [%s] from [%s]\n",
              state->netgr_shortname, domname?domname:"<ALL>"));

    if (domname) {
        dctx->domain = responder_get_domain(client->rctx, domname);
        if (!dctx->domain) {
            ret = EINVAL;
            goto error;
        }

        /* Save the netgroup name for getnetgrent */
        client->netgr_name = talloc_strdup(client, state->netgr_shortname);
        if (!client->netgr_name) {
            ret = ENOMEM;
            goto error;
        }
    } else {
        /* this is a multidomain search */
        dctx->domain = client->rctx->domains;
        cmdctx->check_next = true;

        /* Save the netgroup name for getnetgrent */
        client->netgr_name = talloc_strdup(client, rawname);
        if (!client->netgr_name) {
            ret = ENOMEM;
            goto error;
        }
    }

    ret = setnetgrent_retry(req);
    if (ret != EOK) {
        if (ret == EAGAIN) {
            /* We need to reenter the mainloop
             * We may be refreshing the cache
             */
            return req;
        }

        goto error;
    }

    return req;

error:
    tevent_req_error(req, ret);
    tevent_req_post(req, cmdctx->cctx->ev);
    return req;
}

static errno_t setnetgrent_retry(struct tevent_req *req)
{
    errno_t ret;
    struct setent_step_ctx *step_ctx;
    struct setnetgrent_ctx *state;
    struct cli_ctx *client;
    struct nss_ctx *nctx;
    struct nss_cmd_ctx *cmdctx;
    struct nss_dom_ctx *dctx;

    state = tevent_req_data(req, struct setnetgrent_ctx);
    dctx = state->dctx;
    cmdctx = state->cmdctx;
    client = cmdctx->cctx;
    nctx = talloc_get_type(client->rctx->pvt_ctx, struct nss_ctx);

    dctx->check_provider = NEED_CHECK_PROVIDER(dctx->domain->provider);

    /* Is the result context already available?
     * Check for existing lookups for this netgroup
     */
    ret = get_netgroup_entry(nctx, client->netgr_name, &state->netgr);
    if (ret == EOK) {
        /* Another process already requested this netgroup
         * Check whether it's ready for processing.
         */
        if (state->netgr->ready) {
            if (state->netgr->found) {
                /* Ready to process results */
                tevent_req_done(req);
            } else {
                tevent_req_error(req, ENOENT);
            }

            tevent_req_post(req, nctx->rctx->ev);
            /* Return EOK, otherwise this will be treated as
             * an error
             */
            return EOK;
        }

        /* Result object is still being constructed
         * Register for notification when it's ready
         */
        ret = nss_setent_add_ref(state, state->netgr, req);
        if (ret != EOK) {
            goto done;
        }
        /* Will return control below */
    } else if (ret == ENOENT) {
        /* This is the first attempt to request this netgroup
         */
        state->netgr = talloc_zero(nctx, struct getent_ctx);
        if (!state->netgr) {
            ret = ENOMEM;
            goto done;
        }
        dctx->netgr = state->netgr;

        /* Save the name used for the lookup table
         * so we can remove it in the destructor
         */
        state->netgr->name = talloc_strdup(state->netgr,
                                           client->netgr_name);
        if (!state->netgr->name) {
            talloc_free(state->netgr);
            ret = ENOMEM;
            goto done;
        }

        state->netgr->lookup_table = nctx->netgroups;

        /* Add a reference for ourselves */
        ret = nss_setent_add_ref(state, state->netgr, req);
        if (ret != EOK) {
            talloc_free(state->netgr);
            goto done;
        }

        ret = set_netgroup_entry(nctx, state->netgr);
        if (ret != EOK) {
            DEBUG(1, ("set_netgroup_entry failed.\n"));
            talloc_free(state->netgr);
            goto done;
        }

        /* Perform lookup */
        step_ctx = talloc_zero(state->netgr, struct setent_step_ctx);
        if (!step_ctx) {
            ret = ENOMEM;
            goto done;
        }

        /* Steal the dom_ctx onto the step_ctx so it doesn't go out of scope if
         * this request is canceled while other requests are in-progress.
         */
        step_ctx->dctx = talloc_steal(step_ctx, state->dctx);
        step_ctx->nctx = state->nctx;
        step_ctx->getent_ctx = state->netgr;
        step_ctx->rctx = client->rctx;
        step_ctx->check_next = cmdctx->check_next;
        step_ctx->name =
                talloc_strdup(step_ctx, state->netgr->name);
        if (!step_ctx->name) {
            ret = ENOMEM;
            goto done;
        }

        ret = lookup_netgr_step(step_ctx);
        switch (ret) {
        case EOK:
            break;
        case EMSGSIZE:
            state->netgr->ready = true;
            ret = ENOENT;
            /* FALLTHROUGH */
        default:
            goto done;
        }
        tevent_req_done(req);
        tevent_req_post(req, cmdctx->cctx->ev);
        /* Will return control below */
    } else {
        /* Unexpected error from hash_lookup */
        goto done;
    }

    ret = EOK;

done:
    return ret;
}

static void lookup_netgr_dp_callback(uint16_t err_maj, uint32_t err_min,
                                     const char *err_msg, void *ptr);

static void setnetgrent_result_timeout(struct tevent_context *ev,
                                       struct tevent_timer *te,
                                       struct timeval current_time,
                                       void *pvt);

/* Set up a lifetime timer for this result object
 * We don't want this result object to outlive the
 * entry cache refresh timeout
 */
static void set_netgr_lifetime(uint32_t lifetime,
                               struct setent_step_ctx *step_ctx,
                               struct getent_ctx *netgr)
{
    struct timeval tv;
    struct tevent_timer *te;

    tv = tevent_timeval_current_ofs(lifetime, 0);
    te = tevent_add_timer(step_ctx->nctx->rctx->ev,
                          step_ctx->nctx->gctx, tv,
                          setnetgrent_result_timeout,
                          netgr);
    if (!te) {
        DEBUG(0, ("Could not set up life timer for setnetgrent result object. "
                  "Entries may become stale.\n"));
    }
}

static errno_t lookup_netgr_step(struct setent_step_ctx *step_ctx)
{
    errno_t ret;
    struct sss_domain_info *dom = step_ctx->dctx->domain;
    struct getent_ctx *netgr;
    struct sysdb_ctx *sysdb;
    char *name = NULL;
    uint32_t lifetime;

    /* Check each domain for this netgroup name */
    while (dom) {
        /* Netgroups are a special case. We have to ignore the
         * fully-qualified name requirement because memberNisNetgroup
         * entries do not have fully-qualified components and we need
         * to be able to always check them. So unlike the other
         * maps, here we avoid skipping over fully-qualified domains.
         */

        if (dom != step_ctx->dctx->domain) {
            /* make sure we reset the check_provider flag when we check
             * a new domain */
            step_ctx->dctx->check_provider =
                    NEED_CHECK_PROVIDER(dom->provider);
        }

        /* make sure to update the dctx if we changed domain */
        step_ctx->dctx->domain = dom;

        talloc_free(name);
        name = sss_get_cased_name(step_ctx, step_ctx->name,
                                  dom->case_sensitive);
        if (!name) {
            DEBUG(SSSDBG_CRIT_FAILURE, ("sss_get_cased_name failed\n"));
            return ENOMEM;
        }

        DEBUG(4, ("Requesting info for [%s@%s]\n",
                  name, dom->name));
        sysdb = dom->sysdb;
        if (sysdb == NULL) {
            DEBUG(0, ("Fatal: Sysdb CTX not found for this domain!\n"));
            return EIO;
        }

        /* Look up the netgroup in the cache */
        ret = sysdb_getnetgr(step_ctx->dctx, sysdb, dom, name,
                             &step_ctx->dctx->res);
        if (step_ctx->dctx->res->count > 1) {
            DEBUG(SSSDBG_FATAL_FAILURE,
                  ("getnetgr call returned more than one result !?!\n"));
            return EMSGSIZE;
        }
        if (ret == ENOENT) {
            /* This netgroup was not found in this domain */
            if (!step_ctx->dctx->check_provider) {
                if (step_ctx->check_next) {
                    dom = get_next_domain(dom, false);
                    continue;
                }
                else break;
            }
            ret = EOK;
        }

        if (ret != EOK) {
            DEBUG(1, ("Failed to make request to our cache!\n"));
            return EIO;
        }

        ret = get_netgroup_entry(step_ctx->nctx, step_ctx->name,
                                 &netgr);
        if (ret != EOK) {
            /* Something really bad happened! */
            DEBUG(0, ("Netgroup entry was lost!\n"));
            return ret;
        }

        /* Convert the result to a list of entries */
        ret = sysdb_netgr_to_entries(netgr, step_ctx->dctx->res,
                                     &netgr->entries);
        if (ret == ENOENT) {
            /* This netgroup was not found in this domain */
            DEBUG(2, ("No results for netgroup %s (domain %s)\n",
                      name, dom->name));

            if (!step_ctx->dctx->check_provider) {
                if (step_ctx->check_next) {
                    dom = get_next_domain(dom, false);
                    continue;
                }
                else break;
            }
            ret = EOK;
        }

        if (ret != EOK) {
            DEBUG(1, ("Failed to convert results into entries\n"));
            netgr->ready = true;
            netgr->found = false;
            set_netgr_lifetime(step_ctx->nctx->neg_timeout, step_ctx, netgr);
            return EIO;
        }

        /* if this is a caching provider (or if we haven't checked the cache
         * yet) then verify that the cache is uptodate */
        if (step_ctx->dctx->check_provider) {
            ret = check_cache(step_ctx->dctx,
                              step_ctx->nctx,
                              step_ctx->dctx->res,
                              SSS_DP_NETGR,
                              name, 0,
                              lookup_netgr_dp_callback,
                              step_ctx);
            if (ret != EOK) {
                /* May return EAGAIN legitimately to indicate that
                 * we need to reenter the mainloop
                 */
                return ret;
            }
        }

        /* Results found */
        DEBUG(6, ("Returning info for netgroup [%s@%s]\n",
                  name, dom->name));
        netgr->ready = true;
        netgr->found = true;
        if (step_ctx->nctx->cache_refresh_percent) {
            lifetime = dom->netgroup_timeout *
                (step_ctx->nctx->cache_refresh_percent / 100.0);
        } else {
            lifetime = dom->netgroup_timeout;
        }
        if (lifetime < 10) lifetime = 10;
        set_netgr_lifetime(lifetime, step_ctx, netgr);
        return EOK;
    }

    /* If we've gotten here, then no domain contained this netgroup */
    DEBUG(SSSDBG_MINOR_FAILURE,
          ("No matching domain found for [%s], fail!\n", step_ctx->name));

    netgr = talloc_zero(step_ctx->nctx, struct getent_ctx);
    if (netgr == NULL) {
        DEBUG(1, ("talloc_zero failed, ignored.\n"));
    } else {
        netgr->ready = true;
        netgr->found = false;
        netgr->entries = NULL;
        netgr->lookup_table = step_ctx->nctx->netgroups;
        netgr->name = talloc_strdup(netgr, step_ctx->name);
        if (netgr->name == NULL) {
            DEBUG(1, ("talloc_strdup failed.\n"));
            talloc_free(netgr);
            return ENOMEM;
        }

        ret = set_netgroup_entry(step_ctx->nctx, netgr);
        if (ret != EOK) {
            DEBUG(1, ("set_netgroup_entry failed, ignored.\n"));
        }
        set_netgr_lifetime(step_ctx->nctx->neg_timeout, step_ctx, netgr);
    }

    return ENOENT;
}

static void lookup_netgr_dp_callback(uint16_t err_maj, uint32_t err_min,
                                     const char *err_msg, void *ptr)
{
    struct setent_step_ctx *step_ctx =
            talloc_get_type(ptr, struct setent_step_ctx);
    struct nss_dom_ctx *dctx = step_ctx->dctx;
    struct nss_cmd_ctx *cmdctx = dctx->cmdctx;
    int ret;

    if (err_maj) {
        DEBUG(2, ("Unable to get information from Data Provider\n"
                  "Error: %u, %u, %s\n"
                  "Will try to return what we have in cache\n",
                  (unsigned int)err_maj, (unsigned int)err_min, err_msg));
        /* Loop to the next domain if possible */
        if (cmdctx->check_next && get_next_domain(dctx->domain, false)) {
            dctx->domain = get_next_domain(dctx->domain, false);
            dctx->check_provider = NEED_CHECK_PROVIDER(dctx->domain->provider);
        }
    }

    /* ok the backend returned, search to see if we have updated results */
    ret = lookup_netgr_step(step_ctx);
    if (ret != EOK) {
        if (ret == EAGAIN) {
            return;
        }
    }

    /* We have results to return */
    nss_setent_notify_error(dctx->netgr, ret);
}

static void setnetgrent_result_timeout(struct tevent_context *ev,
                                       struct tevent_timer *te,
                                       struct timeval current_time,
                                       void *pvt)
{
    struct getent_ctx *netgr =
            talloc_get_type(pvt, struct getent_ctx);

    /* Free the netgroup result context
     * The destructor for the netgroup will remove itself
     * from the hash table
     *
     * If additional getnetgrent() requests come in, they
     * will invoke an implicit setnetgrent() call and
     * refresh the result object
     */
    talloc_free(netgr);
}

static errno_t setnetgrent_recv(struct tevent_req *req)
{
    TEVENT_REQ_RETURN_ON_ERROR(req);
    return EOK;
}

static void nss_cmd_setnetgrent_done(struct tevent_req *req)
{
    errno_t reqret;
    errno_t ret;
    struct sss_packet *packet;
    uint8_t *body;
    size_t blen;

    struct nss_cmd_ctx *cmdctx =
            tevent_req_callback_data(req, struct nss_cmd_ctx);

    reqret = setnetgrent_recv(req);
    talloc_zfree(req);
    if (reqret != EOK && reqret != ENOENT) {
        DEBUG(1, ("setnetgrent failed\n"));
        nss_cmd_done(cmdctx, reqret);
        return;
    }

    /* Either we succeeded or no domains were eligible */
    ret = sss_packet_new(cmdctx->cctx->creq, 0,
                         sss_packet_get_cmd(cmdctx->cctx->creq->in),
                         &cmdctx->cctx->creq->out);
    if (ret == EOK) {
        if (reqret == ENOENT) {
            /* Notify the caller that this entry wasn't found */
            sss_cmd_empty_packet(cmdctx->cctx->creq->out);
        } else {
            packet = cmdctx->cctx->creq->out;
            ret = sss_packet_grow(packet, 2*sizeof(uint32_t));
            if (ret != EOK) {
                DEBUG(1, ("Couldn't grow the packet\n"));
                NSS_CMD_FATAL_ERROR(cmdctx);
            }

            sss_packet_get_body(packet, &body, &blen);
            ((uint32_t *)body)[0] = 1; /* Got some results */
            ((uint32_t *)body)[1] = 0; /* reserved */
        }

        sss_cmd_done(cmdctx->cctx, NULL);
        return;
    }

    DEBUG(1, ("Error creating packet\n"));
}

static void setnetgrent_implicit_done(struct tevent_req *req);
static errno_t nss_cmd_getnetgrent_process(struct nss_cmd_ctx *cmdctx,
                                           struct getent_ctx *netgr);
int nss_cmd_getnetgrent(struct cli_ctx *client)
{
    errno_t ret;
    struct nss_ctx *nctx;
    struct nss_cmd_ctx *cmdctx;
    struct getent_ctx *netgr;
    struct tevent_req *req;

    DEBUG(4, ("Requesting netgroup data\n"));

    cmdctx = talloc_zero(client, struct nss_cmd_ctx);
    if (!cmdctx) {
        return ENOMEM;
    }
    cmdctx->cctx = client;

    nctx = talloc_get_type(client->rctx->pvt_ctx, struct nss_ctx);

    if (!client->netgr_name) {
        /* Tried to run getnetgrent without a preceding
         * setnetgrent. There is no way to determine which
         * netgroup is being requested.
         */
        return nss_cmd_done(cmdctx, EINVAL);
    }

    /* Look up the results from the hash */
    ret = get_netgroup_entry(nctx, client->netgr_name, &netgr);
    if (ret == ENOENT) {
        /* We need to invoke an implicit setnetgrent() to
         * wait for the result object to become available.
         */

        req = setnetgrent_send(cmdctx, client->netgr_name, cmdctx);
        if (!req) {
            return nss_cmd_done(cmdctx, EIO);
        }
        tevent_req_set_callback(req, setnetgrent_implicit_done, cmdctx);

        return EOK;
    } else if (ret != EOK) {
        DEBUG(1, ("An unexpected error occurred: [%d][%s]\n",
                  ret, strerror(ret)));

        return nss_cmd_done(cmdctx, ret);
    }

    /* Hash entry was found. Is it ready? */
    if (!netgr->ready) {
        /* We need to invoke an implicit setnetgrent() to
         * wait for the result object to become available.
         */
        req = setnetgrent_send(cmdctx, client->netgr_name, cmdctx);
        if (!req) {
            return nss_cmd_done(cmdctx, EIO);
        }
        tevent_req_set_callback(req, setnetgrent_implicit_done, cmdctx);

        return EOK;
    } else if (!netgr->found) {
        DEBUG(6, ("Results for [%s] not found.\n", client->netgr_name));
        return ENOENT;
    }

    DEBUG(6, ("Returning results for [%s]\n", client->netgr_name));

    /* Read the result strings */
    ret = nss_cmd_getnetgrent_process(cmdctx, netgr);
    if (ret != EOK) {
        DEBUG(1, ("Failed: [%d][%s]\n", ret, strerror(ret)));
    }
    return ret;
}

static void setnetgrent_implicit_done(struct tevent_req *req)
{
    errno_t ret;
    struct getent_ctx *netgr;
    struct nss_cmd_ctx *cmdctx =
            tevent_req_callback_data(req, struct nss_cmd_ctx);
    struct nss_ctx *nctx =
            talloc_get_type(cmdctx->cctx->rctx->pvt_ctx, struct nss_ctx);

    ret = setnetgrent_recv(req);
    talloc_zfree(req);

    /* ENOENT is acceptable, it just means there were no values
     * to be returned. This will be handled gracefully in
     * nss_cmd_retnetgrent later
     */
    if (ret != EOK && ret != ENOENT) {
        DEBUG(0, ("Implicit setnetgrent failed with unexpected error "
                  "[%d][%s]\n", ret, strerror(ret)));
        NSS_CMD_FATAL_ERROR(cmdctx);
    }

    if (ret == ENOENT) {
        /* No entries found for this netgroup */
        nss_cmd_done(cmdctx, ret);
        return;
    }

    /* Look up the results from the hash */
    ret = get_netgroup_entry(nctx, cmdctx->cctx->netgr_name, &netgr);
    if (ret == ENOENT) {
        /* Critical error. This should never happen */
        DEBUG(0, ("Implicit setnetgrent returned success without creating "
                  "result object.\n"));
        NSS_CMD_FATAL_ERROR(cmdctx);
    } else if (ret != EOK) {
        DEBUG(1, ("An unexpected error occurred: [%d][%s]\n",
                  ret, strerror(ret)));

        NSS_CMD_FATAL_ERROR(cmdctx);
    }

    if (!netgr->ready) {
        /* Critical error. This should never happen */
        DEBUG(0, ("Implicit setnetgrent returned success without creating "
                  "result object.\n"));
        NSS_CMD_FATAL_ERROR(cmdctx);
    }

    ret = nss_cmd_getnetgrent_process(cmdctx, netgr);
    if (ret != EOK) {
        DEBUG(0, ("Immediate retrieval failed with unexpected error "
                  "[%d][%s]\n", ret, strerror(ret)));
        NSS_CMD_FATAL_ERROR(cmdctx);
    }
}

static errno_t nss_cmd_retnetgrent(struct cli_ctx *client,
                                   struct sysdb_netgroup_ctx **entries,
                                   int num);
static errno_t nss_cmd_getnetgrent_process(struct nss_cmd_ctx *cmdctx,
                                           struct getent_ctx *netgr)
{
    struct cli_ctx *client = cmdctx->cctx;
    uint8_t *body;
    size_t blen;
    uint32_t num;
    errno_t ret;

    /* get max num of entries to return in one call */
    sss_packet_get_body(client->creq->in, &body, &blen);
    if (blen != sizeof(uint32_t)) {
        return EINVAL;
    }
    num = *((uint32_t *)body);

    /* create response packet */
    ret = sss_packet_new(client->creq, 0,
                         sss_packet_get_cmd(client->creq->in),
                         &client->creq->out);
    if (ret != EOK) {
        return ret;
    }

    if (!netgr->entries || netgr->entries[0] == NULL) {
        /* No entries */
        DEBUG(5, ("No entries found\n"));
        ret = sss_cmd_empty_packet(client->creq->out);
        if (ret != EOK) {
            return nss_cmd_done(cmdctx, ret);
        }
        goto done;
    }

    ret = nss_cmd_retnetgrent(client, netgr->entries, num);

done:
    sss_packet_set_error(client->creq->out, ret);
    sss_cmd_done(client, cmdctx);

    return EOK;
}

static errno_t nss_cmd_retnetgrent(struct cli_ctx *client,
                                   struct sysdb_netgroup_ctx **entries,
                                   int count)
{
    size_t len;
    size_t hostlen = 0;
    size_t userlen = 0;
    size_t domainlen = 0;
    size_t grouplen = 0;
    uint8_t *body;
    size_t blen, rp;
    errno_t ret;
    struct sss_packet *packet = client->creq->out;
    int num, start;

    /* first 2 fields (len and reserved), filled up later */
    rp = 2*sizeof(uint32_t);
    ret = sss_packet_grow(packet, rp);
    if (ret != EOK) return ret;

    start = client->netgrent_cur;
    num = 0;
    while (entries[client->netgrent_cur] &&
           (client->netgrent_cur - start) < count) {
        if (entries[client->netgrent_cur]->type == SYSDB_NETGROUP_TRIPLE_VAL) {
            hostlen = 1;
            if (entries[client->netgrent_cur]->value.triple.hostname) {
                hostlen += strlen(entries[client->netgrent_cur]->value.triple.hostname);
            }

            userlen = 1;
            if (entries[client->netgrent_cur]->value.triple.username) {
                userlen += strlen(entries[client->netgrent_cur]->value.triple.username);
            }

            domainlen = 1;
            if (entries[client->netgrent_cur]->value.triple.domainname) {
                domainlen += strlen(entries[client->netgrent_cur]->value.triple.domainname);
            }

            len = sizeof(uint32_t) + hostlen + userlen + domainlen;
            ret = sss_packet_grow(packet, len);
            if (ret != EOK) {
                return ret;
            }
            sss_packet_get_body(packet, &body, &blen);

            SAFEALIGN_SET_UINT32(&body[rp], SSS_NETGR_REP_TRIPLE, &rp);

            if (hostlen == 1) {
                body[rp] = '\0';
            } else {
                memcpy(&body[rp],
                       entries[client->netgrent_cur]->value.triple.hostname,
                       hostlen);
            }
            rp += hostlen;

            if (userlen == 1) {
                body[rp] = '\0';
            } else {
                memcpy(&body[rp],
                       entries[client->netgrent_cur]->value.triple.username,
                       userlen);
            }
            rp += userlen;

            if (domainlen == 1) {
                body[rp] = '\0';
            } else {
                memcpy(&body[rp],
                       entries[client->netgrent_cur]->value.triple.domainname,
                       domainlen);
            }
            rp += domainlen;
        } else if (entries[client->netgrent_cur]->type == SYSDB_NETGROUP_GROUP_VAL) {
            if (entries[client->netgrent_cur]->value.groupname == NULL ||
                entries[client->netgrent_cur]->value.groupname[0] == '\0') {
                DEBUG(1, ("Empty netgroup member. Please check your cache.\n"));
                continue;
            }

            grouplen = 1 + strlen(entries[client->netgrent_cur]->value.groupname);

            len = sizeof(uint32_t) + grouplen;

            ret = sss_packet_grow(packet, len);
            if (ret != EOK) {
                return ret;
            }

            sss_packet_get_body(packet, &body, &blen);

            SAFEALIGN_SET_UINT32(&body[rp], SSS_NETGR_REP_GROUP, &rp);

            memcpy(&body[rp],
                   entries[client->netgrent_cur]->value.groupname,
                   grouplen);
            rp += grouplen;
        } else {
            DEBUG(1, ("Unexpected value type for netgroup entry. "
                      "Please check your cache.\n"));
            continue;
        }

        num++;
        client->netgrent_cur++;
    }

    sss_packet_get_body(packet, &body, &blen);
    ((uint32_t *)body)[0] = num; /* num results */
    ((uint32_t *)body)[1] = 0; /* reserved */

    return EOK;
}

int nss_cmd_endnetgrent(struct cli_ctx *client)
{
    errno_t ret;

    /* create response packet */
    ret = sss_packet_new(client->creq, 0,
                         sss_packet_get_cmd(client->creq->in),
                         &client->creq->out);

    if (ret != EOK) {
        return ret;
    }

    /* Reset the indices so that subsequent requests start at zero */
    client->netgrent_cur = 0;
    talloc_zfree(client->netgr_name);

    sss_cmd_done(client, NULL);
    return EOK;
}

void
netgroup_hash_delete_cb(hash_entry_t *item,
                        hash_destroy_enum deltype, void *pvt)
{
    struct getent_ctx *netgr;

    if (deltype != HASH_ENTRY_DESTROY) {
        return;
    }

    netgr = talloc_get_type(item->value.ptr, struct getent_ctx);
    if (!netgr) {
        DEBUG(SSSDBG_OP_FAILURE, ("Invalid netgroup\n"));
        return;
    }

    /* So that the destructor wouldn't attempt to remove the netgroup from hash
     * table */
    netgr->lookup_table = NULL;
}

errno_t nss_orphan_netgroups(struct nss_ctx *nctx)
{
    int hret;
    unsigned long mcount;
    unsigned long i;
    hash_key_t *netgroups;

    if (!nctx || !nctx->netgroups) {
        return EINVAL;
    }

    hret = hash_keys(nctx->netgroups, &mcount, &netgroups);
    if (hret != HASH_SUCCESS) {
        return EIO;
    }

    DEBUG(SSSDBG_TRACE_FUNC, ("Removing netgroups from memory cache.\n"));

    for (i = 0; i < mcount; i++) {
        /* netgroup entry will be deleted by setnetgrent_result_timeout */
        hret = hash_delete(nctx->netgroups, &netgroups[i]);
        if (hret != HASH_SUCCESS) {
            DEBUG(SSSDBG_MINOR_FAILURE, ("Could not delete key from hash\n"));
            continue;
        }
    }

    return EOK;
}