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authorKay Sievers <kay@vrfy.org>2015-06-09 14:27:33 +0200
committerKay Sievers <kay@vrfy.org>2015-06-11 10:52:46 +0200
commita095315b3c31f7a419baceac82c26c3c5ac0cd12 (patch)
treea5a70cf5b5430c0a6873311437b8345d7071f249 /src/shared/hostname-util.c
parent37c47e5e5b8e47dd886ed6e8355b1203082b4a3e (diff)
build-sys: split internal basic/ library from shared/
basic/ can be used by everything cannot use anything outside of basic/ libsystemd/ can use basic/ cannot use shared/ shared/ can use libsystemd/
Diffstat (limited to 'src/shared/hostname-util.c')
-rw-r--r--src/shared/hostname-util.c193
1 files changed, 0 insertions, 193 deletions
diff --git a/src/shared/hostname-util.c b/src/shared/hostname-util.c
deleted file mode 100644
index e336f269fa..0000000000
--- a/src/shared/hostname-util.c
+++ /dev/null
@@ -1,193 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2015 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/utsname.h>
-#include <ctype.h>
-
-#include "util.h"
-#include "hostname-util.h"
-
-bool hostname_is_set(void) {
- struct utsname u;
-
- assert_se(uname(&u) >= 0);
-
- if (isempty(u.nodename))
- return false;
-
- /* This is the built-in kernel default host name */
- if (streq(u.nodename, "(none)"))
- return false;
-
- return true;
-}
-
-char* gethostname_malloc(void) {
- struct utsname u;
-
- assert_se(uname(&u) >= 0);
-
- if (isempty(u.nodename) || streq(u.nodename, "(none)"))
- return strdup(u.sysname);
-
- return strdup(u.nodename);
-}
-
-static bool hostname_valid_char(char c) {
- return
- (c >= 'a' && c <= 'z') ||
- (c >= 'A' && c <= 'Z') ||
- (c >= '0' && c <= '9') ||
- c == '-' ||
- c == '_' ||
- c == '.';
-}
-
-bool hostname_is_valid(const char *s) {
- const char *p;
- bool dot;
-
- if (isempty(s))
- return false;
-
- /* Doesn't accept empty hostnames, hostnames with trailing or
- * leading dots, and hostnames with multiple dots in a
- * sequence. Also ensures that the length stays below
- * HOST_NAME_MAX. */
-
- for (p = s, dot = true; *p; p++) {
- if (*p == '.') {
- if (dot)
- return false;
-
- dot = true;
- } else {
- if (!hostname_valid_char(*p))
- return false;
-
- dot = false;
- }
- }
-
- if (dot)
- return false;
-
- if (p-s > HOST_NAME_MAX)
- return false;
-
- return true;
-}
-
-char* hostname_cleanup(char *s, bool lowercase) {
- char *p, *d;
- bool dot;
-
- assert(s);
-
- for (p = s, d = s, dot = true; *p; p++) {
- if (*p == '.') {
- if (dot)
- continue;
-
- *(d++) = '.';
- dot = true;
- } else if (hostname_valid_char(*p)) {
- *(d++) = lowercase ? tolower(*p) : *p;
- dot = false;
- }
-
- }
-
- if (dot && d > s)
- d[-1] = 0;
- else
- *d = 0;
-
- strshorten(s, HOST_NAME_MAX);
-
- return s;
-}
-
-bool is_localhost(const char *hostname) {
- assert(hostname);
-
- /* This tries to identify local host and domain names
- * described in RFC6761 plus the redhatism of .localdomain */
-
- return streq(hostname, "localhost") ||
- streq(hostname, "localhost.") ||
- streq(hostname, "localdomain.") ||
- streq(hostname, "localdomain") ||
- endswith(hostname, ".localhost") ||
- endswith(hostname, ".localhost.") ||
- endswith(hostname, ".localdomain") ||
- endswith(hostname, ".localdomain.");
-}
-
-int sethostname_idempotent(const char *s) {
- char buf[HOST_NAME_MAX + 1] = {};
-
- assert(s);
-
- if (gethostname(buf, sizeof(buf)) < 0)
- return -errno;
-
- if (streq(buf, s))
- return 0;
-
- if (sethostname(s, strlen(s)) < 0)
- return -errno;
-
- return 1;
-}
-
-int read_hostname_config(const char *path, char **hostname) {
- _cleanup_fclose_ FILE *f = NULL;
- char l[LINE_MAX];
- char *name = NULL;
-
- assert(path);
- assert(hostname);
-
- f = fopen(path, "re");
- if (!f)
- return -errno;
-
- /* may have comments, ignore them */
- FOREACH_LINE(l, f, return -errno) {
- truncate_nl(l);
- if (l[0] != '\0' && l[0] != '#') {
- /* found line with value */
- name = hostname_cleanup(l, false);
- name = strdup(name);
- if (!name)
- return -ENOMEM;
- break;
- }
- }
-
- if (!name)
- /* no non-empty line found */
- return -ENOENT;
-
- *hostname = name;
- return 0;
-}