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Several commands must be disabled in the kernel build because they depend on interfaces that are not available outside of the kernel: dd, df, losetup, mkfatfs, mkdr, and ps.

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This commit is contained in:
Gregory Nutt 2014-09-07 10:46:06 -06:00
parent 1597617001
commit 4eadcabc1b
2 changed files with 27 additions and 3 deletions
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28
nshlib/nsh.h
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@ -547,12 +547,36 @@
#endif
/* Certain commands are not available in a kernel builds because they depend
* on interfaces that are not exported by the kernel.
* on interfaces that are not exported by the kernel. These are actually
* bugs that need to be fixed but for now the commands are simply disabled.
* There are three classes of fixes required:
*
* - Some of these interfaces are inherently internal to the OS (such as
* sched_foreach and foreach_mountpoint) and should never be made
* available to user applications as OS interfaces. For these, the long
* range solution to restoring the functionality will be to support procfs
* entries the provide the necessary interfaces.
* - Other interfaces are more standard and for these there probably should
* be new system calls to support the OS interface. Such interfaces
* include things like losetup, loteardown, and mkrd.
* - Other interfaces simply need to be moved out of the OS and into the C
* library where they will become accessible to application code. Such
* interfaces include mkfatfs.
*/
#if defined(CONFIG_BUILD_PROTECTED) || defined(CONFIG_BUILD_KERNEL)
# undef CONFIG_NSH_DISABLE_DF
# undef CONFIG_NSH_DISABLE_PS /* 'ps' depends on sched_foreach */
# define CONFIG_NSH_DISABLE_PS 1
# undef CONFIG_NSH_DISABLE_DF /* 'df' depends on foreach_mountpoint */
# define CONFIG_NSH_DISABLE_DF 1
# undef CONFIG_NSH_DISABLE_DD /* 'dd' depends on bchlib_* interfaces */
# define CONFIG_NSH_DISABLE_DD 1
# undef CONFIG_NSH_DISABLE_LOSETUP /* 'losetup' depends on losetup/loteardown */
# define CONFIG_NSH_DISABLE_LOSETUP 1
# undef CONFIG_NSH_DISABLE_MKFATFS /* 'mkfatfs' depends on mkfatfs interface */
# define CONFIG_NSH_DISABLE_MKFATFS 1
# undef CONFIG_NSH_DISABLE_MKRD /* 'mkrd' depends on ramdisk_register */
# define CONFIG_NSH_DISABLE_MKRD 1
#endif
/****************************************************************************

2
nshlib/nsh_ddcmd.c
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@ -59,7 +59,7 @@
#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_NSH_DISABLE_DD)
/****************************************************************************
* Definitions
* Pre-processor Definitions
****************************************************************************/
/* If no sector size is specified wity BS=, then the following default value