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diff --git src/providers/ldap/sdap_async_sudo_hostinfo.c src/providers/ldap/sdap_async_sudo_hostinfo.c
index a3c3e1068..f33299304 100644
--- src/providers/ldap/sdap_async_sudo_hostinfo.c
+++ src/providers/ldap/sdap_async_sudo_hostinfo.c
@@ -357,7 +357,7 @@ static struct tevent_req *sdap_sudo_get_hostnames_send(TALLOC_CTX *mem_ctx,
struct tevent_req *subreq = NULL;
struct sdap_sudo_get_hostnames_state *state = NULL;
char *dot = NULL;
- char hostname[HOST_NAME_MAX + 1];
+ char hostname[_POSIX_HOST_NAME_MAX + 1];
int ret;
req = tevent_req_create(mem_ctx, &state,
@@ -380,14 +380,14 @@ static struct tevent_req *sdap_sudo_get_hostnames_send(TALLOC_CTX *mem_ctx,
/* get hostname */
errno = 0;
- ret = gethostname(hostname, sizeof(hostname));
+ ret = gethostname(hostname, _POSIX_HOST_NAME_MAX);
if (ret != EOK) {
ret = errno;
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to retrieve machine hostname "
"[%d]: %s\n", ret, strerror(ret));
goto done;
}
- hostname[HOST_NAME_MAX] = '\0';
+ hostname[_POSIX_HOST_NAME_MAX] = '\0';
state->hostnames[0] = talloc_strdup(state->hostnames, hostname);
if (state->hostnames[0] == NULL) {
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