From e4914622b3166eef092be13b24456e1705c84e7d Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Thu, 4 Aug 2016 12:57:02 -0600
Subject: [PATCH] NSH: cmd_mkfifo depend son  CONFIG_DEV_PIPE_SIZE > 0

---
 nshlib/README.txt    | 2 +-
 nshlib/nsh.h         | 3 ++-
 nshlib/nsh_command.c | 3 ++-
 nshlib/nsh_fscmds.c  | 7 ++++---
 4 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/nshlib/README.txt b/nshlib/README.txt
index a5e3c3003..1cca3a1ef 100644
--- a/nshlib/README.txt
+++ b/nshlib/README.txt
@@ -1201,7 +1201,7 @@ Command Dependencies on Configuration Settings
   mb,mh,mw   ---
   mkdir      (((!CONFIG_DISABLE_MOUNTPOINT && CONFIG_FS_WRITABLE) || !CONFIG_DISABLE_PSEUDOFS_OPERATIONS) && CONFIG_NFILE_DESCRIPTORS > 0)
   mkfatfs    !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_FAT
-  mkfifo     CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_PIPES
+  mkfifo     CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_PIPES && CONFIG_DEV_PIPE_SIZE > 0
   mkrd       !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_WRITABLE (see note 4)
   mount      !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_READABLE (see note 3)
   mv         (((!CONFIG_DISABLE_MOUNTPOINT && CONFIG_FS_WRITABLE) || !CONFIG_DISABLE_PSEUDOFS_OPERATIONS) && CONFIG_NFILE_DESCRIPTORS > 0) (see note 4)
diff --git a/nshlib/nsh.h b/nshlib/nsh.h
index 3f6f57414..b7587b5e4 100644
--- a/nshlib/nsh.h
+++ b/nshlib/nsh.h
@@ -1039,7 +1039,8 @@ int cmd_lsmod(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #   if defined(CONFIG_SMART_DEV_LOOP) && !defined(CONFIG_NSH_DISABLE_LOSMART)
        int cmd_losmart(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #   endif
-#   if defined(CONFIG_PIPES) && !defined(CONFIG_NSH_DISABLE_MKFIFO)
+#   if defined(CONFIG_PIPES) && CONFIG_DEV_PIPE_SIZE > 0 && \
+      !defined(CONFIG_NSH_DISABLE_MKFIFO)
        int cmd_mkfifo(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #   endif
 #   ifdef CONFIG_FS_READABLE
diff --git a/nshlib/nsh_command.c b/nshlib/nsh_command.c
index 7aa6b1ad3..0349a6660 100644
--- a/nshlib/nsh_command.c
+++ b/nshlib/nsh_command.c
@@ -297,7 +297,8 @@ static const struct cmdmap_s g_cmdmap[] =
 #endif
 
 #if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
-# if defined(CONFIG_PIPES) && !defined(CONFIG_NSH_DISABLE_MKFIFO)
+# if defined(CONFIG_PIPES) && CONFIG_DEV_PIPE_SIZE > 0 && \
+    !defined(CONFIG_NSH_DISABLE_MKFIFO)
   { "mkfifo",   cmd_mkfifo,   2, 2, "<path>" },
 # endif
 #endif
diff --git a/nshlib/nsh_fscmds.c b/nshlib/nsh_fscmds.c
index 3bc89feab..92fa97afc 100644
--- a/nshlib/nsh_fscmds.c
+++ b/nshlib/nsh_fscmds.c
@@ -1181,7 +1181,8 @@ int cmd_mkfatfs(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
  ****************************************************************************/
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
-#if defined(CONFIG_PIPES) && !defined(CONFIG_NSH_DISABLE_MKFIFO)
+# if defined(CONFIG_PIPES) && CONFIG_DEV_PIPE_SIZE > 0 && \
+    !defined(CONFIG_NSH_DISABLE_MKFIFO)
 int cmd_mkfifo(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 {
   char *fullpath = nsh_getfullpath(vtbl, argv[1]);
@@ -1200,8 +1201,8 @@ int cmd_mkfifo(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 
   return ret;
 }
-#endif
-#endif
+#endif # CONFIG_PIPES && CONFIG_DEV_PIPE_SIZE > 0 && !CONFIG_NSH_DISABLE_MKFIFO
+#endif # CONFIG_NFILE_DESCRIPTORS > 0
 
 /****************************************************************************
  * Name: cmd_mkrd