/**
* \brief Add a new item into a group
*
* If the group is not big enough, the internal array of items is automatically
* resized. An index of the new item is set to corresponding value. Other value
* are set to default values (zeros).
* \param[in,out] grp Pointer to the group
* \return On success returns a pointer the to new item. Otherwise (memory
* re-allocation error) returns NULL.
*/
static struct pevents_item *
group_item_new(struct pevents_group *grp)
{
if (grp->all_size == grp->all_prealloc) {
if (group_resize(grp, 2U * grp->all_prealloc)) {
// Failed
return NULL;
}
}
struct pevents_item *new_item;
if ((new_item = calloc(1, sizeof(*new_item))) == NULL) {
MSG_ERROR(msg_module, "Unable to allocate memory (%s:%d)",
__FILE__, __LINE__);
return NULL;
}
new_item->idx = grp->all_size; // Set an index
grp->all_ptr[grp->all_size++] = new_item;
return new_item;
}
static int
cap_getgrcommon_r(cap_channel_t *chan, const char *cmd, const char *name,
gid_t gid, struct group *grp, char *buffer, size_t bufsize,
struct group **result)
{
nvlist_t *nvl;
bool getgr_r;
int error;
nvl = nvlist_create(0);
nvlist_add_string(nvl, "cmd", cmd);
if (strcmp(cmd, "getgrent") == 0 || strcmp(cmd, "getgrent_r") == 0) {
/* Add nothing. */
} else if (strcmp(cmd, "getgrnam") == 0 ||
strcmp(cmd, "getgrnam_r") == 0) {
nvlist_add_string(nvl, "name", name);
} else if (strcmp(cmd, "getgrgid") == 0 ||
strcmp(cmd, "getgrgid_r") == 0) {
nvlist_add_number(nvl, "gid", (uint64_t)gid);
} else {
abort();
}
nvl = cap_xfer_nvlist(chan, nvl, 0);
if (nvl == NULL) {
assert(errno != 0);
*result = NULL;
return (errno);
}
error = (int)nvlist_get_number(nvl, "error");
if (error != 0) {
nvlist_destroy(nvl);
*result = NULL;
return (error);
}
if (!nvlist_exists_string(nvl, "gr_name")) {
/* Not found. */
nvlist_destroy(nvl);
*result = NULL;
return (0);
}
getgr_r = (strcmp(cmd, "getgrent_r") == 0 ||
strcmp(cmd, "getgrnam_r") == 0 || strcmp(cmd, "getgrgid_r") == 0);
for (;;) {
error = group_unpack(nvl, grp, buffer, bufsize);
if (getgr_r || error != ERANGE)
break;
assert(buffer == gbuffer);
assert(bufsize == gbufsize);
error = group_resize();
if (error != 0)
break;
/* Update pointers after resize. */
buffer = gbuffer;
bufsize = gbufsize;
}
nvlist_destroy(nvl);
if (error == 0)
*result = grp;
else
*result = NULL;
return (error);
}