multiload: Don't unconditionally use PATH_MAX

Since PATH_MAX is not guaranteed to be defined, unconditionally
using it will cause a build failure on platforms that don't define
it. So stop using it and use dynamic allocation to achieve the same
result.

Taken from gnome-applets commit: 877359047a4c3327d574955a72a102cc7320f6d3
From: Emilio Pozuelo Monfort <[email protected]>
Gnome bug: https://bugzilla.gnome.org/show_bug.cgi?id=603997

1 files changed, 19 insertions, 12 deletions

diff --git a/multiload/linux-proc.c b/multiload/linux-proc.c
index 13ebc5ff..d2149229 100644
--- a/multiload/linux-proc.c
+++ b/multiload/linux-proc.c
@@ -285,21 +285,28 @@ is_net_device_virtual(char *device)
      * /sys/class/net/name-of-dev/ .  This second method is more complex
      * but more reliable.
      */
-    char path[PATH_MAX];
+    gboolean ret = FALSE;
+    char *path = malloc (strlen (device) + strlen ("/sys/class/net//device") + 1);
 
-    /* Check if /sys/class/net/name-of-dev/ exists (may be old linux kernel
-     * or not linux at all). */
-    if (sprintf(path, "/sys/class/net/%s", device) < 0)
-        return FALSE;
-    if (access(path, F_OK) != 0)
-        return FALSE; /* unknown */
-
-    if (sprintf(path, "/sys/class/net/%s/device", device) < 0)
+    if (path == NULL)
         return FALSE;
-    if (access(path, F_OK) != 0)
-        return TRUE;
 
-    return FALSE;
+    /* Check if /sys/class/net/name-of-dev/ exists (may be old linux kernel
+     * or not linux at all). */
+    do {
+        if (sprintf(path, "/sys/class/net/%s", device) < 0)
+            break;
+        if (access(path, F_OK) != 0)
+            break; /* unknown */
+
+        if (sprintf(path, "/sys/class/net/%s/device", device) < 0)
+            break;
+        if (access(path, F_OK) != 0)
+            ret = TRUE;
+    } while (0);
+
+    free (path);
+    return ret;
 }
 
 void