make gcc shut up

[elogind.git] / hostname-setup.c

diff --git a/hostname-setup.c b/hostname-setup.c
index eca33a98533b35af7c15c015756954f9b93626c6..71a3f75bd98fed18872dbb552fd1f0992e0613ff 100644 (file)
--- a/hostname-setup.c
+++ b/hostname-setup.c
@@ -32,15 +32,43 @@
 
 #define LINE_MAX 4096
 
+#if defined(TARGET_FEDORA)
+#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
+
+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)
+#if defined(TARGET_FEDORA) || defined(TARGET_ARCH) || defined(TARGET_GENTOO)
         int r;
         FILE *f;
 
         assert(hn);
 
-        if (!(f = fopen("/etc/sysconfig/network", "re")))
+        if (!(f = fopen(FILENAME, "re")))
                 return -errno;
 
         for (;;) {
@@ -57,7 +85,7 @@ static int read_hostname(char **hn) {
 
                 s = strstrip(line);
 
-                if (!startswith(s, "HOSTNAME="))
+                if (!startswith_no_case(s, "HOSTNAME="))
                         continue;
 
                 if (!(k = strdup(s+9))) {
@@ -65,6 +93,14 @@ static int read_hostname(char **hn) {
                         goto finish;
                 }
 
+                strip_bad_chars(k);
+
+                if (k[0] == 0) {
+                        free(k);
+                        r = -ENOENT;
+                        goto finish;
+                }
+
                 *hn = k;
                 break;
         }
@@ -75,13 +111,13 @@ finish:
         fclose(f);
         return r;
 
-#elif defined(TARGET_DEBIAN)
+#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));
@@ -90,9 +126,17 @@ finish:
         if (!k)
                 return -ENOMEM;
 
+        strip_bad_chars(k);
+
+        if (k[0] == 0) {
+                free(k);
+                return -ENOENT;
+        }
+
         *hn = k;
+
 #else
-#warn "Don't know how to read the hostname"
+#warning "Don't know how to read the hostname"
 
         return -ENOENT;
 #endif