[PATCH v2 2/4] minios: clean up allocation of char arrays used for xenbus paths

[Matt Wilson <msw@linux.com>]

From: Matt Wilson <msw@amazon.com>

This patch cleans up instances of char array allocation where string
lengths were manually counted to use strlen() instead. There are no
functional changes in this patch.

Signed-off-by: Matt Wilson <msw@amazon.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
---
 extras/mini-os/blkfront.c       |    6 +++---
 extras/mini-os/console/xenbus.c |    4 ++--
 extras/mini-os/fbfront.c        |   10 +++++-----
 extras/mini-os/netfront.c       |    4 ++--
 extras/mini-os/pcifront.c       |    8 ++++----
 5 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/extras/mini-os/blkfront.c b/extras/mini-os/blkfront.c
index 70976f5..73837f6 100644
--- a/extras/mini-os/blkfront.c
+++ b/extras/mini-os/blkfront.c
@@ -99,7 +99,7 @@ struct blkfront_dev *init_blkfront(char *_nodename, struct blkfront_info *info)
 
     struct blkfront_dev *dev;
 
-    char path[strlen(nodename) + 1 + 10 + 1];
+    char path[strlen(nodename) + strlen("/backend-id") + 1];
 
     printk("******************* BLKFRONT for %s **********\n\n\n", nodename);
 
@@ -189,7 +189,7 @@ done:
 
     {
         XenbusState state;
-        char path[strlen(dev->backend) + 1 + 19 + 1];
+        char path[strlen(dev->backend) + strlen("/feature-flush-cache") + 1];
         snprintf(path, sizeof(path), "%s/mode", dev->backend);
         msg = xenbus_read(XBT_NIL, path, &c);
         if (msg) {
@@ -253,7 +253,7 @@ void shutdown_blkfront(struct blkfront_dev *dev)
     char* err = NULL;
     XenbusState state;
 
-    char path[strlen(dev->backend) + 1 + 5 + 1];
+    char path[strlen(dev->backend) + strlen("/state") + 1];
     char nodename[strlen(dev->nodename) + strlen("/event-channel") + 1];
 
     blkfront_sync(dev);
diff --git a/extras/mini-os/console/xenbus.c b/extras/mini-os/console/xenbus.c
index 1ecfcc5..23d4d32 100644
--- a/extras/mini-os/console/xenbus.c
+++ b/extras/mini-os/console/xenbus.c
@@ -18,8 +18,8 @@ void free_consfront(struct consfront_dev *dev)
     char* err = NULL;
     XenbusState state;
 
-    char path[strlen(dev->backend) + 1 + 5 + 1];
-    char nodename[strlen(dev->nodename) + 1 + 5 + 1];
+    char path[strlen(dev->backend) + strlen("/state") + 1];
+    char nodename[strlen(dev->nodename) + strlen("/state") + 1];
 
     snprintf(path, sizeof(path), "%s/state", dev->backend);
     snprintf(nodename, sizeof(nodename), "%s/state", dev->nodename);
diff --git a/extras/mini-os/fbfront.c b/extras/mini-os/fbfront.c
index 6eddb3c..9148496 100644
--- a/extras/mini-os/fbfront.c
+++ b/extras/mini-os/fbfront.c
@@ -75,7 +75,7 @@ struct kbdfront_dev *init_kbdfront(char *_nodename, int abs_pointer)
     char* nodename = _nodename ? _nodename : "device/vkbd/0";
     struct kbdfront_dev *dev;
 
-    char path[strlen(nodename) + 1 + 10 + 1];
+    char path[strlen(nodename) + strlen("/backend-id") + 1];
 
     printk("******************* KBDFRONT for %s **********\n\n\n", nodename);
 
@@ -239,7 +239,7 @@ void shutdown_kbdfront(struct kbdfront_dev *dev)
     char* err = NULL;
     XenbusState state;
 
-    char path[strlen(dev->backend) + 1 + 5 + 1];
+    char path[strlen(dev->backend) + strlen("/state") + 1];
     char nodename[strlen(dev->nodename) + strlen("/request-abs-pointer") + 1];
 
     printk("close kbd: backend at %s\n",dev->backend);
@@ -413,7 +413,7 @@ struct fbfront_dev *init_fbfront(char *_nodename, unsigned long *mfns, int width
     unsigned long mapped;
     char* nodename = _nodename ? _nodename : "device/vfb/0";
 
-    char path[strlen(nodename) + 1 + 10 + 1];
+    char path[strlen(nodename) + strlen("/backend-id") + 1];
 
     printk("******************* FBFRONT for %s **********\n\n\n", nodename);
 
@@ -520,7 +520,7 @@ done:
 
     {
         XenbusState state;
-        char path[strlen(dev->backend) + 1 + 14 + 1];
+        char path[strlen(dev->backend) + strlen("/request-update") + 1];
         char frontpath[strlen(nodename) + strlen("/state") + 1];
 
         snprintf(path, sizeof(path), "%s/state", dev->backend);
@@ -631,7 +631,7 @@ void shutdown_fbfront(struct fbfront_dev *dev)
     char* err = NULL;
     XenbusState state;
 
-    char path[strlen(dev->backend) + 1 + 5 + 1];
+    char path[strlen(dev->backend) + strlen("/state") + 1];
     char nodename[strlen(dev->nodename) + strlen("/feature-update") + 1];
 
     printk("close fb: backend at %s\n",dev->backend);
diff --git a/extras/mini-os/netfront.c b/extras/mini-os/netfront.c
index ddf56ea..7947fc2 100644
--- a/extras/mini-os/netfront.c
+++ b/extras/mini-os/netfront.c
@@ -441,7 +441,7 @@ done:
 
     {
         XenbusState state;
-        char path[strlen(dev->backend) + 1 + 5 + 1];
+        char path[strlen(dev->backend) + strlen("/state") + 1];
         snprintf(path, sizeof(path), "%s/state", dev->backend);
 
         xenbus_watch_path_token(XBT_NIL, path, path, &dev->events);
@@ -507,7 +507,7 @@ void shutdown_netfront(struct netfront_dev *dev)
     char* err = NULL;
     XenbusState state;
 
-    char path[strlen(dev->backend) + 1 + 5 + 1];
+    char path[strlen(dev->backend) + strlen("/state") + 1];
     char nodename[strlen(dev->nodename) + strlen("/request-rx-copy") + 1];
 
     printk("close network: backend at %s\n",dev->backend);
diff --git a/extras/mini-os/pcifront.c b/extras/mini-os/pcifront.c
index f9ae768..e6a5f4e 100644
--- a/extras/mini-os/pcifront.c
+++ b/extras/mini-os/pcifront.c
@@ -149,7 +149,7 @@ struct pcifront_dev *init_pcifront(char *_nodename)
 
     struct pcifront_dev *dev;
 
-    char path[strlen(nodename) + 1 + 10 + 1];
+    char path[strlen(nodename) + strlen("/backend-id") + 1];
 
     if (!_nodename && pcidev)
         return pcidev;
@@ -237,8 +237,8 @@ done:
     printk("backend at %s\n", dev->backend);
 
     {
-        char path[strlen(dev->backend) + 1 + 5 + 1];
-        char frontpath[strlen(nodename) + 1 + 5 + 1];
+        char path[strlen(dev->backend) + strlen("/state") + 1];
+        char frontpath[strlen(nodename) + strlen("/state") + 1];
         XenbusState state;
         snprintf(path, sizeof(path), "%s/state", dev->backend);
 
@@ -322,7 +322,7 @@ void shutdown_pcifront(struct pcifront_dev *dev)
     char* err = NULL;
     XenbusState state;
 
-    char path[strlen(dev->backend) + 1 + 5 + 1];
+    char path[strlen(dev->backend) + strlen("/state") + 1];
     char nodename[strlen(dev->nodename) + strlen("/event-channel") + 1];
 
     printk("close pci: backend at %s\n",dev->backend);
-- 
1.7.9.5