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diff --git src/providers/ipa/ipa_common.c src/providers/ipa/ipa_common.c
index 17d14e6b0..681ac8615 100644
--- src/providers/ipa/ipa_common.c
+++ src/providers/ipa/ipa_common.c
@@ -49,7 +49,7 @@ int ipa_get_options(TALLOC_CTX *memctx,
char *realm;
char *ipa_hostname;
int ret;
- char hostname[HOST_NAME_MAX + 1];
+ char hostname[_POSIX_HOST_NAME_MAX + 1];
opts = talloc_zero(memctx, struct ipa_options);
if (!opts) return ENOMEM;
@@ -79,14 +79,14 @@ int ipa_get_options(TALLOC_CTX *memctx,
ipa_hostname = dp_opt_get_string(opts->basic, IPA_HOSTNAME);
if (ipa_hostname == NULL) {
- ret = gethostname(hostname, sizeof(hostname));
+ ret = gethostname(hostname, _POSIX_HOST_NAME_MAX);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "gethostname failed [%d][%s].\n", errno,
strerror(errno));
ret = errno;
goto done;
}
- hostname[HOST_NAME_MAX] = '\0';
+ hostname[_POSIX_HOST_NAME_MAX] = '\0';
DEBUG(SSSDBG_TRACE_ALL, "Setting ipa_hostname to [%s].\n", hostname);
ret = dp_opt_set_string(opts->basic, IPA_HOSTNAME, hostname);
if (ret != EOK) {
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