posix/wordexp.h

   1 /* Copyright (C) 1991,1992,1996-1999,2001,2003,2012
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _WORDEXP_H
  20 #define _WORDEXP_H      1
  21
  22 #include <features.h>
  23 #define __need_size_t
  24 #include <stddef.h>
  25
  26 __BEGIN_DECLS
  27
  28 /* Bits set in the FLAGS argument to `wordexp'.  */
  29 enum
  30   {
  31     WRDE_DOOFFS = (1 << 0),     /* Insert PWORDEXP->we_offs NULLs.  */
  32     WRDE_APPEND = (1 << 1),     /* Append to results of a previous call.  */
  33     WRDE_NOCMD = (1 << 2),      /* Don't do command substitution.  */
  34     WRDE_REUSE = (1 << 3),      /* Reuse storage in PWORDEXP.  */
  35     WRDE_SHOWERR = (1 << 4),    /* Don't redirect stderr to /dev/null.  */
  36     WRDE_UNDEF = (1 << 5),      /* Error for expanding undefined variables.  */
  37     __WRDE_FLAGS = (WRDE_DOOFFS | WRDE_APPEND | WRDE_NOCMD |
  38                     WRDE_REUSE | WRDE_SHOWERR | WRDE_UNDEF)
  39   };
  40
  41 /* Structure describing a word-expansion run.  */
  42 typedef struct
  43   {
  44     size_t we_wordc;            /* Count of words matched.  */
  45     char **we_wordv;            /* List of expanded words.  */
  46     size_t we_offs;             /* Slots to reserve in `we_wordv'.  */
  47   } wordexp_t;
  48
  49 /* Possible nonzero return values from `wordexp'.  */
  50 enum
  51   {
  52 #ifdef __USE_XOPEN
  53     WRDE_NOSYS = -1,            /* Never used since we support `wordexp'.  */
  54 #endif
  55     WRDE_NOSPACE = 1,           /* Ran out of memory.  */
  56     WRDE_BADCHAR,               /* A metachar appears in the wrong place.  */
  57     WRDE_BADVAL,                /* Undefined var reference with WRDE_UNDEF.  */
  58     WRDE_CMDSUB,                /* Command substitution with WRDE_NOCMD.  */
  59     WRDE_SYNTAX                 /* Shell syntax error.  */
  60   };
  61
  62 /* Do word expansion of WORDS into PWORDEXP.  */
  63 extern int wordexp (const char *__restrict __words,
  64                     wordexp_t *__restrict __pwordexp, int __flags);
  65
  66 /* Free the storage allocated by a `wordexp' call.  */
  67 extern void wordfree (wordexp_t *__wordexp) __THROW;
  68
  69 __END_DECLS
  70
  71 #endif /* wordexp.h  */