#define LINE_MAX 4096
-static int read_hostname(char **hn) {
-
#if defined(TARGET_FEDORA)
- int r;
- FILE *f;
-
- assert(hn);
-
- if (!(f = fopen("/etc/sysconfig/network", "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);
+#define FILENAME "/etc/sysconfig/network"
+#elif defined(TARGET_SUSE)
+#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
- if (!startswith(s, "HOSTNAME="))
- continue;
+static char* strip_bad_chars(char *s) {
+ char *p, *d;
- if (!(k = strdup(s+9))) {
- r = -ENOMEM;
- goto finish;
- }
+ for (p = s, d = s; *p; p++)
+ if ((*p >= 'a' && *p <= 'z') ||
+ (*p >= 'A' && *p <= 'Z') ||
+ (*p >= '0' && *p <= '9') ||
+ *p == '-' ||
+ *p == '_')
+ *(d++) = *p;
- *hn = k;
- break;
- }
+ *d = 0;
- r = 0;
+ return s;
+}
-finish:
- fclose(f);
- return r;
+static int read_hostname(char **hn) {
-#elif defined(TARGET_ARCH)
+#if defined(TARGET_FEDORA) || defined(TARGET_ARCH) || defined(TARGET_GENTOO)
int r;
FILE *f;
assert(hn);
- if (!(f = fopen("/etc/rc.conf", "re")))
+ if (!(f = fopen(FILENAME, "re")))
return -errno;
for (;;) {
s = strstrip(line);
- if (!startswith(s, "HOSTNAME="))
+ if (!startswith_no_case(s, "HOSTNAME="))
continue;
if (!(k = strdup(s+9))) {
goto finish;
}
+ strip_bad_chars(k);
+
+ if (k[0] == 0) {
+ free(k);
+ r = -ENOENT;
+ goto finish;
+ }
+
*hn = k;
break;
}
fclose(f);
return r;
-#elif defined(TARGET_SUSE)
+#elif defined(TARGET_SUSE) || defined(TARGET_DEBIAN)
int r;
char *s, *k;
assert(hn);
- if ((r = read_one_line_file("/etc/HOSTNAME", &s)) < 0)
+ if ((r = read_one_line_file(FILENAME, &s)) < 0)
return r;
k = strdup(strstrip(s));
if (!k)
return -ENOMEM;
- *hn = k;
+ strip_bad_chars(k);
-#elif defined(TARGET_DEBIAN)
- int r;
- char *s, *k;
-
- assert(hn);
-
- if ((r = read_one_line_file("/etc/hostname", &s)) < 0)
- return r;
-
- k = strdup(strstrip(s));
- free(s);
-
- if (!k)
- return -ENOMEM;
+ if (k[0] == 0) {
+ free(k);
+ return -ENOENT;
+ }
*hn = k;
+
#else
#warning "Don't know how to read the hostname"