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libs/libc/builtin/: builtint_isavail() should not set the errno variable because this functions may be used by internal OS logic for which setting the rrno variable would be inappropriate.

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This commit is contained in:
Gregory Nutt
2019-09-11 12:37:29 -06:00
parent d8adf712a2
commit 254a906409
7 changed files with 61 additions and 23 deletions
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include/nuttx/lib/builtin.h
+13 -9
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@@ -131,9 +131,9 @@ EXTERN const int g_builtin_count;
*
* Input Parameters:
* builtins - The list of built-in functions. Each entry is a name-value
* pair that maps a builtin function name to its user-space
* pair that maps a built-in function name to its user-space
* entry point address.
* count - The number of name-value pairs in the builtin list.
* count - The number of name-value pairs in the built-in list.
*
* Returned Value:
* None
@@ -149,15 +149,18 @@ void builtin_setlist(FAR const struct builtin_s *builtins, int count);
* Name: builtin_isavail
*
* Description:
* Checks for availability of application registered during compile time.
* Checks for availability of an application named 'appname' registered
* during compile time and, if available, returns the index into the table
* of built-in applications.
*
* Input Parameters:
* filename - Name of the linked-in binary to be started.
*
* Returned Value:
* This is an end-user function, so it follows the normal convention:
* Returns index of builtin application. If it is not found then it
* returns -1 (ERROR) and sets errno appropriately.
* This is an internal function, used by by the NuttX binfmt logic and
* by the application built-in logic. It returns a non-negative index to
* the application entry in the table of built-in applications on success
* or a negated errno value in the event of a failure.
*
****************************************************************************/
@@ -185,9 +188,10 @@ FAR const char *builtin_getname(int index);
* Name: builtin_for_index
*
* Description:
* Returns the builtin_s structure for the selected builtin.
* If support for builtin functions is enabled in the NuttX configuration,
* then this function must be provided by the application code.
* Returns the builtin_s structure for the selected built-in.
* If support for built-in functions is enabled in the NuttX
* configuration, then this function must be provided by the application
* code.
*
* Input Parameters:
* index, from 0 and on...