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-rw-r--r--avahi-core/domain-util.c65
1 files changed, 60 insertions, 5 deletions
diff --git a/avahi-core/domain-util.c b/avahi-core/domain-util.c
index 3aeba12..777a064 100644
--- a/avahi-core/domain-util.c
+++ b/avahi-core/domain-util.c
@@ -33,6 +33,7 @@
#include <avahi-common/malloc.h>
+#include "log.h"
#include "domain-util.h"
#include "util.h"
@@ -51,6 +52,40 @@ static void strip_bad_chars(char *s) {
*d = 0;
}
+#ifdef __linux__
+static int load_lsb_distrib_id(char *ret_s, size_t size) {
+ FILE *f;
+
+ assert(ret_s);
+ assert(size > 0);
+
+ if (!(f = fopen("/etc/lsb-release", "r")))
+ return -1;
+
+ while (!feof(f)) {
+ char ln[256], *p;
+
+ if (!fgets(ln, sizeof(ln), f))
+ break;
+
+ if (strncmp(ln, "DISTRIB_ID=", 11))
+ continue;
+
+ p = ln + 11;
+ p += strspn(p, "\"");
+ p[strcspn(p, "\"")] = 0;
+
+ snprintf(ret_s, size, "%s", p);
+
+ fclose(f);
+ return 0;
+ }
+
+ fclose(f);
+ return -1;
+}
+#endif
+
char *avahi_get_host_name(char *ret_s, size_t size) {
assert(ret_s);
assert(size > 0);
@@ -61,19 +96,39 @@ char *avahi_get_host_name(char *ret_s, size_t size) {
} else
*ret_s = 0;
+ if (strcmp(ret_s, "localhost") == 0 || strncmp(ret_s, "localhost.", 10) == 0) {
+ *ret_s = 0;
+ avahi_log_warn("System host name is set to 'localhost'. This is not a suitable mDNS host name, looking for alternatives.");
+ }
+
if (*ret_s == 0) {
- struct utsname utsname;
-
/* No hostname was set, so let's take the OS name */
- if (uname(&utsname) >= 0) {
- snprintf(ret_s, size, "%s", utsname.sysname);
+#ifdef __linux__
+
+ /* Try LSB distribution name first */
+ if (load_lsb_distrib_id(ret_s, size) >= 0) {
strip_bad_chars(ret_s);
avahi_strdown(ret_s);
}
if (*ret_s == 0)
- snprintf(ret_s, size, "unnamed");
+#endif
+
+ {
+ /* Try uname() second */
+ struct utsname utsname;
+
+ if (uname(&utsname) >= 0) {
+ snprintf(ret_s, size, "%s", utsname.sysname);
+ strip_bad_chars(ret_s);
+ avahi_strdown(ret_s);
+ }
+
+ /* Give up */
+ if (*ret_s == 0)
+ snprintf(ret_s, size, "unnamed");
+ }
}
if (size >= AVAHI_LABEL_MAX)