#include <assert.h>
#include <string.h>
#include <unistd.h>
+#include <ctype.h>
+#include <sys/utsname.h>
+#include <stdio.h>
#include <avahi-common/malloc.h>
#include "domain-util.h"
+#include "util.h"
-char *avahi_get_host_name(char *ret_s, size_t size) {
-#ifdef HOST_NAME_MAX
- char t[HOST_NAME_MAX];
-#else
- char t[256];
-#endif
+static void strip_bad_chars(char *s) {
+ char *p, *d;
+
+ s[strcspn(s, ".")] = 0;
+ for (p = s, d = s; *p; p++)
+ if ((*p >= 'a' && *p <= 'z') ||
+ (*p >= 'A' && *p <= 'Z') ||
+ (*p >= '0' && *p <= '9') ||
+ *p == '-')
+ *(d++) = *p;
+
+ *d = 0;
+}
+
+char *avahi_get_host_name(char *ret_s, size_t size) {
assert(ret_s);
assert(size > 0);
+
+ if (gethostname(ret_s, size) >= 0) {
+ ret_s[size-1] = 0;
+ strip_bad_chars(ret_s);
+ } else
+ *ret_s = 0;
+
+ 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);
+ strip_bad_chars(ret_s);
+ avahi_strdown(ret_s);
+ }
+
+ if (*ret_s == 0)
+ snprintf(ret_s, size, "unnamed");
+ }
+
+ if (size >= AVAHI_LABEL_MAX)
+ ret_s[AVAHI_LABEL_MAX-1] = 0;
- gethostname(t, sizeof(t));
- t[sizeof(t)-1] = 0;
-
- return avahi_normalize_name(t, ret_s, size);
+ return ret_s;
}
char *avahi_get_host_name_strdup(void) {