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authorLennart Poettering <lennart@poettering.net>2010-05-16 18:45:24 +0200
committerLennart Poettering <lennart@poettering.net>2010-05-16 18:45:24 +0200
commite99e38bbdcca3fe5956823bdb3d38544ccf93221 (patch)
tree109871cf2bdcad19105d55f4eea62d5495a8f614 /src/hostname-setup.c
parente9da3678fcfc774b325dc1eaa054d0e00028a1fc (diff)
build-sys: move source files to subdirectory
Diffstat (limited to 'src/hostname-setup.c')
-rw-r--r--src/hostname-setup.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/src/hostname-setup.c b/src/hostname-setup.c
new file mode 100644
index 0000000000..3b988d4c8b
--- /dev/null
+++ b/src/hostname-setup.c
@@ -0,0 +1,168 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "hostname-setup.h"
+#include "macro.h"
+#include "util.h"
+#include "log.h"
+
+#define LINE_MAX 4096
+
+#if defined(TARGET_FEDORA)
+#define FILENAME "/etc/sysconfig/network"
+#elif defined(TARGET_SUSE) || defined(TARGET_SLACKWARE)
+#define FILENAME "/etc/HOSTNAME"
+#elif defined(TARGET_DEBIAN)
+#define FILENAME "/etc/hostname"
+#elif defined(TARGET_ARCH)
+#define FILENAME "/etc/rc.conf"
+#elif defined(TARGET_GENTOO)
+#define FILENAME "/etc/conf.d/hostname"
+#endif
+
+static char* strip_bad_chars(char *s) {
+ char *p, *d;
+
+ for (p = s, d = s; *p; p++)
+ if ((*p >= 'a' && *p <= 'z') ||
+ (*p >= 'A' && *p <= 'Z') ||
+ (*p >= '0' && *p <= '9') ||
+ *p == '-' ||
+ *p == '_')
+ *(d++) = *p;
+
+ *d = 0;
+
+ return s;
+}
+
+static int read_hostname(char **hn) {
+
+#if defined(TARGET_FEDORA) || defined(TARGET_ARCH) || defined(TARGET_GENTOO)
+ int r;
+ FILE *f;
+
+ assert(hn);
+
+ if (!(f = fopen(FILENAME, "re")))
+ return -errno;
+
+ for (;;) {
+ char line[LINE_MAX];
+ char *s, *k;
+
+ if (!fgets(line, sizeof(line), f)) {
+ if (feof(f))
+ break;
+
+ r = -errno;
+ goto finish;
+ }
+
+ s = strstrip(line);
+
+ if (!startswith_no_case(s, "HOSTNAME="))
+ continue;
+
+ if (!(k = strdup(s+9))) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ strip_bad_chars(k);
+
+ if (k[0] == 0) {
+ free(k);
+ r = -ENOENT;
+ goto finish;
+ }
+
+ *hn = k;
+ break;
+ }
+
+ r = 0;
+
+finish:
+ fclose(f);
+ return r;
+
+#elif defined(TARGET_SUSE) || defined(TARGET_DEBIAN) || defined(TARGET_SLACKWARE)
+ int r;
+ char *s, *k;
+
+ assert(hn);
+
+ if ((r = read_one_line_file(FILENAME, &s)) < 0)
+ return r;
+
+ k = strdup(strstrip(s));
+ free(s);
+
+ if (!k)
+ return -ENOMEM;
+
+ strip_bad_chars(k);
+
+ if (k[0] == 0) {
+ free(k);
+ return -ENOENT;
+ }
+
+ *hn = k;
+
+#else
+#warning "Don't know how to read the hostname"
+
+ return -ENOENT;
+#endif
+
+ return 0;
+}
+
+int hostname_setup(void) {
+ int r;
+ char *hn;
+
+ if ((r = read_hostname(&hn)) < 0) {
+ if (r != -ENOENT)
+ log_warning("Failed to read configured hostname: %s", strerror(-r));
+
+ return r;
+ }
+
+ r = sethostname(hn, strlen(hn)) < 0 ? -errno : 0;
+
+ if (r < 0)
+ log_warning("Failed to set hostname to <%s>: %s", hn, strerror(-r));
+ else
+ log_info("Set hostname to <%s>.", hn);
+
+ free(hn);
+
+ return r;
+}