mirror of
https://github.com/morgan9e/systemd
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0da2bb7414
get_pretty_hostname() so far had semantics not in line with our usual ones: the return parameter was actually freed before the return string written into it, because that's what parse_env_file() does. Moreover, when the value was not set it would return NULL but succeed. Let's normalize this, and only fill in the return value if there's something set, and never read from it, like we usually do with return parameter, and in particular those named "ret_xyz". The existing callers don't really care about the differences, but it's nicer to normalize behaviour to minimize surprises.
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include <stdbool.h>
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#include <stdio.h>
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#include "macro.h"
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#include "strv.h"
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typedef enum GetHostnameFlags {
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GET_HOSTNAME_ALLOW_LOCALHOST = 1 << 0, /* accepts "localhost" or friends. */
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GET_HOSTNAME_FALLBACK_DEFAULT = 1 << 1, /* use default hostname if no hostname is set. */
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GET_HOSTNAME_SHORT = 1 << 2, /* kills the FQDN part if present. */
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} GetHostnameFlags;
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int gethostname_full(GetHostnameFlags flags, char **ret);
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static inline int gethostname_strict(char **ret) {
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return gethostname_full(0, ret);
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}
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static inline char* gethostname_malloc(void) {
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char *s;
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if (gethostname_full(GET_HOSTNAME_ALLOW_LOCALHOST | GET_HOSTNAME_FALLBACK_DEFAULT, &s) < 0)
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return NULL;
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return s;
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}
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static inline char* gethostname_short_malloc(void) {
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char *s;
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if (gethostname_full(GET_HOSTNAME_ALLOW_LOCALHOST | GET_HOSTNAME_FALLBACK_DEFAULT | GET_HOSTNAME_SHORT, &s) < 0)
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return NULL;
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return s;
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}
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char* get_default_hostname(void);
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bool valid_ldh_char(char c) _const_;
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typedef enum ValidHostnameFlags {
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VALID_HOSTNAME_TRAILING_DOT = 1 << 0, /* Accept trailing dot on multi-label names */
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VALID_HOSTNAME_DOT_HOST = 1 << 1, /* Accept ".host" as valid hostname */
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} ValidHostnameFlags;
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bool hostname_is_valid(const char *s, ValidHostnameFlags flags) _pure_;
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char* hostname_cleanup(char *s);
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bool is_localhost(const char *hostname);
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static inline bool is_gateway_hostname(const char *hostname) {
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/* This tries to identify the valid syntaxes for the our synthetic "gateway" host. */
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return STRCASE_IN_SET(hostname, "_gateway", "_gateway.");
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}
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static inline bool is_outbound_hostname(const char *hostname) {
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/* This tries to identify the valid syntaxes for the our synthetic "outbound" host. */
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return STRCASE_IN_SET(hostname, "_outbound", "_outbound.");
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}
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int get_pretty_hostname(char **ret);
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