#include "macro.h"
#include "util.h"
#include "log.h"
-
-#if defined(TARGET_FEDORA) || defined(TARGET_ALTLINUX) || defined(TARGET_MANDRIVA) || defined(TARGET_MEEGO) || defined(TARGET_MAGEIA)
-#define FILENAME "/etc/sysconfig/network"
-#elif defined(TARGET_SUSE) || defined(TARGET_SLACKWARE)
-#define FILENAME "/etc/HOSTNAME"
-#elif defined(TARGET_ARCH)
-#define FILENAME "/etc/rc.conf"
-#elif defined(TARGET_GENTOO)
-#define FILENAME "/etc/conf.d/hostname"
-#endif
+#include "fileio.h"
static int read_and_strip_hostname(const char *path, char **hn) {
char *s;
if (r < 0)
return r;
- hostname_cleanup(s);
+ hostname_cleanup(s, false);
if (isempty(s)) {
free(s);
}
*hn = s;
-
- return 0;
-}
-
-static int read_distro_hostname(char **hn) {
-
-#if defined(TARGET_FEDORA) || defined(TARGET_ARCH) || defined(TARGET_GENTOO) || defined(TARGET_ALTLINUX) || defined(TARGET_MANDRIVA) || defined(TARGET_MEEGO) || defined(TARGET_MAGEIA)
- int r;
- FILE *f;
-
- assert(hn);
-
- f = fopen(FILENAME, "re");
- if (!f)
- 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;
-
- k = strdup(s+9);
- if (!k) {
- r = -ENOMEM;
- goto finish;
- }
-
- hostname_cleanup(k);
-
- if (isempty(k)) {
- free(k);
- r = -ENOENT;
- goto finish;
- }
-
- *hn = k;
- r = 0;
- goto finish;
- }
-
- r = -ENOENT;
-
-finish:
- fclose(f);
- return r;
-
-#elif defined(TARGET_SUSE) || defined(TARGET_SLACKWARE)
- return read_and_strip_hostname(FILENAME, hn);
-#else
- return -ENOENT;
-#endif
-}
-
-static int read_hostname(char **hn) {
- int r;
-
- assert(hn);
-
- /* First, try to load the generic hostname configuration file,
- * that we support on all distributions */
-
- r = read_and_strip_hostname("/etc/hostname", hn);
- if (r < 0) {
- if (r == -ENOENT)
- return read_distro_hostname(hn);
-
- return r;
- }
-
return 0;
}
int hostname_setup(void) {
int r;
- char *b = NULL;
- const char *hn = NULL;
+ _cleanup_free_ char *b = NULL;
+ const char *hn;
bool enoent = false;
- r = read_hostname(&b);
+ r = read_and_strip_hostname("/etc/hostname", &b);
if (r < 0) {
if (r == -ENOENT)
enoent = true;
else
- log_warning("Failed to read configured hostname: %s", strerror(-r));
+ log_warning_errno(r, "Failed to read configured hostname: %m");
hn = NULL;
} else
hn = b;
- if (!hn) {
- /* Don't override the hostname if it is unset and not
- * explicitly configured */
-
- char *old_hostname = NULL;
-
- old_hostname = gethostname_malloc();
- if (old_hostname) {
- bool already_set;
-
- already_set = old_hostname[0] != 0;
- free(old_hostname);
-
- if (already_set)
- goto finish;
- }
+ if (isempty(hn)) {
+ /* Don't override the hostname if it is already set
+ * and not explicitly configured */
+ if (hostname_is_set())
+ return 0;
if (enoent)
log_info("No hostname configured.");
hn = "localhost";
}
- if (sethostname(hn, strlen(hn)) < 0) {
- log_warning("Failed to set hostname to <%s>: %m", hn);
- r = -errno;
- } else
- log_info("Set hostname to <%s>.", hn);
+ if (sethostname_idempotent(hn) < 0)
+ return log_warning_errno(errno, "Failed to set hostname to <%s>: %m", hn);
-finish:
- free(b);
-
- return r;
+ log_info("Set hostname to <%s>.", hn);
+ return 0;
}