NAME

       wordexp.h - word-expansion types

SYNOPSIS

       #include <wordexp.h>

DESCRIPTION

       The  <wordexp.h>  header  shall  define  the structures and symbolic constants used by the
       wordexp() and wordfree() functions.

       The structure type wordexp_t shall contain 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 flags argument to the wordexp() function shall be  the  bitwise-inclusive  OR  of  the
       following flags:

       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 following constants shall be defined 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_NOSYS
              Reserved.

       WRDE_SYNTAX
              Shell syntax error, such as unbalanced parentheses or unterminated string.

       The <wordexp.h> header shall define the following type:

       size_t 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  implementation  may  define additional macros or constants using names beginning with
       WRDE_.

       The following sections are informative.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       <stddef.h> , the System Interfaces volume of IEEE Std 1003.1-2001,  wordexp(),  the  Shell
       and Utilities volume of IEEE Std 1003.1-2001

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .