типы расширения (expansion types)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
wordexp.h — word-expansion types
Синопсис (Synopsis)
#include <wordexp.h>
Описание (Description)
The <wordexp.h> header shall define the structures and symbolic
constants used by the wordexp() and wordfree() functions.
The <wordexp.h> header shall define the wordexp_t structure type,
which shall include at least the following members:
size_t we_wordc Count of words matched by words.
char **we_wordv Pointer to list of expanded words.
size_t we_offs Slots to reserve at the beginning of we_wordv.
The <wordexp.h> header shall define the following symbolic
constants for use as flags for the wordexp() function:
WRDE_APPEND Append words to those previously generated.
WRDE_DOOFFS Number of null pointers to prepend to we_wordv.
WRDE_NOCMD Fail if command substitution is requested.
WRDE_REUSE The pwordexp argument was passed to a previous
successful call to wordexp(), and has not been
passed to wordfree(). The result is the same as if
the application had called wordfree() and then
called wordexp() without WRDE_REUSE.
WRDE_SHOWERR Do not redirect stderr to /dev/null.
WRDE_UNDEF Report error on an attempt to expand an undefined
shell variable.
The <wordexp.h> header shall define the following symbolic
constants as error return values:
WRDE_BADCHAR One of the unquoted characters—<newline>, '|', '&',
';', '<', '>', '(', ')', '{', '}'—appears in words
in an inappropriate context.
WRDE_BADVAL Reference to undefined shell variable when
WRDE_UNDEF is set in flags.
WRDE_CMDSUB Command substitution requested when WRDE_NOCMD was
set in flags.
WRDE_NOSPACE Attempt to allocate memory failed.
WRDE_SYNTAX Shell syntax error, such as unbalanced parentheses
or unterminated string.
The <wordexp.h> header shall define the size_t type as described
in <stddef.h>.
The following shall be declared as functions and may also be
defined as macros. Function prototypes shall be provided.
int wordexp(const char *restrict, wordexp_t *restrict, int);
void wordfree(wordexp_t *);
The following sections are informative.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
stddef.h(0p)
The System Interfaces volume of POSIX.1‐2017, Section 2.6, Word
Expansions
