[thirdparty/bash.git] / general.h

/* general.h -- defines that everybody likes to use. */

/* Copyright (C) 1993-2016 Free Software Foundation, Inc.

   This file is part of GNU Bash, the Bourne Again SHell.

   Bash is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   Bash is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
*/

#if !defined (_GENERAL_H_)
#define _GENERAL_H_

#include "stdc.h"

#include "bashtypes.h"
#include "chartypes.h"

#if defined (HAVE_SYS_RESOURCE_H) && defined (RLIMTYPE)
#  if defined (HAVE_SYS_TIME_H)
#    include <sys/time.h>
#  endif
#  include <sys/resource.h>
#endif

#if defined (HAVE_STRING_H)
#  include <string.h>
#else
#  include <strings.h>
#endif /* !HAVE_STRING_H */

#if defined (HAVE_LIMITS_H)
#  include <limits.h>
#endif

#include "xmalloc.h"

/* NULL pointer type. */
#if !defined (NULL)
#  if defined (__STDC__)
#    define NULL ((void *) 0)
#  else
#    define NULL 0x0
#  endif /* !__STDC__ */
#endif /* !NULL */

/* Hardly used anymore */
#define pointer_to_int(x)	(int)((char *)x - (char *)0)

#if defined (alpha) && defined (__GNUC__) && !defined (strchr) && !defined (__STDC__)
extern char *strchr (), *strrchr ();
#endif

#if !defined (strcpy) && (defined (HAVE_DECL_STRCPY) && !HAVE_DECL_STRCPY)
extern char *strcpy __P((char *, const char *));
#endif

#if !defined (savestring)
#  define savestring(x) (char *)strcpy (xmalloc (1 + strlen (x)), (x))
#endif

#ifndef member
#  define member(c, s) ((c) ? ((char *)mbschr ((s), (c)) != (char *)NULL) : 0)
#endif

#ifndef whitespace
#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
#endif

#ifndef CHAR_MAX
#  ifdef __CHAR_UNSIGNED__
#    define CHAR_MAX	0xff
#  else
#    define CHAR_MAX	0x7f
#  endif
#endif

#ifndef CHAR_BIT
#  define CHAR_BIT 8
#endif

/* Nonzero if the integer type T is signed.  */
#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))

/* Bound on length of the string representing an integer value of type T.
   Subtract one for the sign bit if T is signed;
   302 / 1000 is log10 (2) rounded up;
   add one for integer division truncation;
   add one more for a minus sign if t is signed.  */
#define INT_STRLEN_BOUND(t) \
  ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
   + 1 + TYPE_SIGNED (t))


/* Define exactly what a legal shell identifier consists of. */
#define legal_variable_starter(c) (ISALPHA(c) || (c == '_'))
#define legal_variable_char(c)	(ISALNUM(c) || c == '_')

/* Definitions used in subst.c and by the `read' builtin for field
   splitting. */
#define spctabnl(c)	((c) == ' ' || (c) == '\t' || (c) == '\n')

/* All structs which contain a `next' field should have that field
   as the first field in the struct.  This means that functions
   can be written to handle the general case for linked lists. */
typedef struct g_list {
  struct g_list *next;
} GENERIC_LIST;

/* Here is a generic structure for associating character strings
   with integers.  It is used in the parser for shell tokenization. */
typedef struct {
  char *word;
  int token;
} STRING_INT_ALIST;

/* A macro to avoid making an unnecessary function call. */
#define REVERSE_LIST(list, type) \
  ((list && list->next) ? (type)list_reverse ((GENERIC_LIST *)list) \
			: (type)(list))

#if __GNUC__ > 1
#  define FASTCOPY(s, d, n)  __builtin_memcpy ((d), (s), (n))
#else /* !__GNUC__ */
#  if !defined (HAVE_BCOPY)
#    if !defined (HAVE_MEMMOVE)
#      define FASTCOPY(s, d, n)  memcpy ((d), (s), (n))
#    else
#      define FASTCOPY(s, d, n)  memmove ((d), (s), (n))
#    endif /* !HAVE_MEMMOVE */
#  else /* HAVE_BCOPY */
#    define FASTCOPY(s, d, n)  bcopy ((s), (d), (n))
#  endif /* HAVE_BCOPY */
#endif /* !__GNUC__ */

/* String comparisons that possibly save a function call each. */
#define STREQ(a, b) ((a)[0] == (b)[0] && strcmp(a, b) == 0)
#define STREQN(a, b, n) ((n == 0) ? (1) \
				  : ((a)[0] == (b)[0] && strncmp(a, b, n) == 0))

/* More convenience definitions that possibly save system or libc calls. */
#define STRLEN(s) (((s) && (s)[0]) ? ((s)[1] ? ((s)[2] ? strlen(s) : 2) : 1) : 0)
#define FREE(s)  do { if (s) free (s); } while (0)
#define MEMBER(c, s) (((c) && c == (s)[0] && !(s)[1]) || (member(c, s)))

/* A fairly hairy macro to check whether an allocated string has more room,
   and to resize it using xrealloc if it does not.
   STR is the string (char *)
   CIND is the current index into the string (int)
   ROOM is the amount of additional room we need in the string (int)
   CSIZE is the currently-allocated size of STR (int)
   SINCR is how much to increment CSIZE before calling xrealloc (int) */

#define RESIZE_MALLOCED_BUFFER(str, cind, room, csize, sincr) \
  do { \
    if ((cind) + (room) >= csize) \
      { \
	while ((cind) + (room) >= csize) \
	  csize += (sincr); \
	str = xrealloc (str, csize); \
      } \
  } while (0)

/* Function pointers can be declared as (Function *)foo. */
#if !defined (_FUNCTION_DEF)
#  define _FUNCTION_DEF
typedef int Function ();
typedef void VFunction ();
typedef char *CPFunction ();		/* no longer used */
typedef char **CPPFunction ();		/* no longer used */
#endif /* _FUNCTION_DEF */

#ifndef SH_FUNCTION_TYPEDEF
#  define SH_FUNCTION_TYPEDEF

/* Shell function typedefs with prototypes */
/* `Generic' function pointer typedefs */

typedef int sh_intfunc_t __P((int));
typedef int sh_ivoidfunc_t __P((void));
typedef int sh_icpfunc_t __P((char *));
typedef int sh_icppfunc_t __P((char **));
typedef int sh_iptrfunc_t __P((PTR_T));

typedef void sh_voidfunc_t __P((void));
typedef void sh_vintfunc_t __P((int));
typedef void sh_vcpfunc_t __P((char *));
typedef void sh_vcppfunc_t __P((char **));
typedef void sh_vptrfunc_t __P((PTR_T));

typedef int sh_wdesc_func_t __P((WORD_DESC *));
typedef int sh_wlist_func_t __P((WORD_LIST *));

typedef int sh_glist_func_t __P((GENERIC_LIST *));

typedef char *sh_string_func_t __P((char *));	/* like savestring, et al. */

typedef int sh_msg_func_t __P((const char *, ...));	/* printf(3)-like */
typedef void sh_vmsg_func_t __P((const char *, ...));	/* printf(3)-like */

/* Specific function pointer typedefs.  Most of these could be done
   with #defines. */
typedef void sh_sv_func_t __P((char *));	/* sh_vcpfunc_t */
typedef void sh_free_func_t __P((PTR_T));	/* sh_vptrfunc_t */
typedef void sh_resetsig_func_t __P((int));	/* sh_vintfunc_t */

typedef int sh_ignore_func_t __P((const char *));	/* sh_icpfunc_t */

typedef int sh_assign_func_t __P((const char *));
typedef int sh_wassign_func_t __P((WORD_DESC *, int));

typedef int sh_load_func_t __P((char *));
typedef void sh_unload_func_t __P((char *));

typedef int sh_builtin_func_t __P((WORD_LIST *)); /* sh_wlist_func_t */

#endif /* SH_FUNCTION_TYPEDEF */

#define NOW	((time_t) time ((time_t *) 0))

/* Some defines for calling file status functions. */
#define FS_EXISTS	  0x1
#define FS_EXECABLE	  0x2
#define FS_EXEC_PREFERRED 0x4
#define FS_EXEC_ONLY	  0x8
#define FS_DIRECTORY	  0x10
#define FS_NODIRS	  0x20
#define FS_READABLE	  0x40

/* Default maximum for move_to_high_fd */
#define HIGH_FD_MAX	256

/* The type of function passed as the fourth argument to qsort(3). */
#ifdef __STDC__
typedef int QSFUNC (const void *, const void *);
#else
typedef int QSFUNC ();
#endif 

/* Some useful definitions for Unix pathnames.  Argument convention:
   x == string, c == character */

#if !defined (__CYGWIN__)
#  define ABSPATH(x)	((x)[0] == '/')
#  define RELPATH(x)	((x)[0] != '/')
#else /* __CYGWIN__ */
#  define ABSPATH(x)	(((x)[0] && ISALPHA((unsigned char)(x)[0]) && (x)[1] == ':') || ISDIRSEP((x)[0]))
#  define RELPATH(x)	(ABSPATH(x) == 0)
#endif /* __CYGWIN__ */

#define ROOTEDPATH(x)	(ABSPATH(x))

#define DIRSEP	'/'
#if !defined (__CYGWIN__)
#  define ISDIRSEP(c)	((c) == '/')
#else
#  define ISDIRSEP(c)	((c) == '/' || (c) == '\\')
#endif /* __CYGWIN__ */
#define PATHSEP(c)	(ISDIRSEP(c) || (c) == 0)

#if 0
/* Declarations for functions defined in xmalloc.c */
extern PTR_T xmalloc __P((size_t));
extern PTR_T xrealloc __P((void *, size_t));
extern void xfree __P((void *));
#endif

/* Declarations for functions defined in general.c */
extern void posix_initialize __P((int));

#if defined (RLIMTYPE)
extern RLIMTYPE string_to_rlimtype __P((char *));
extern void print_rlimtype __P((RLIMTYPE, int));
#endif

extern int all_digits __P((const char *));
extern int legal_number __P((const char *, intmax_t *));
extern int legal_identifier __P((const char *));
extern int importable_function_name __P((const char *, size_t));
extern int exportable_function_name __P((const char *));
extern int check_identifier __P((WORD_DESC *, int));
extern int valid_nameref_value __P((const char *, int));
extern int check_selfref __P((const char *, char *, int));
extern int legal_alias_name __P((const char *, int));
extern int assignment __P((const char *, int));

extern int sh_unset_nodelay_mode __P((int));
extern int sh_validfd __P((int));
extern int fd_ispipe __P((int));
extern void check_dev_tty __P((void));
extern int move_to_high_fd __P((int, int, int));
extern int check_binary_file __P((const char *, int));

#ifdef _POSIXSTAT_H_
extern int same_file __P((const char *, const char *, struct stat *, struct stat *));
#endif

extern int sh_openpipe __P((int *));
extern int sh_closepipe __P((int *));

extern int file_exists __P((const char *));
extern int file_isdir __P((const char  *));
extern int file_iswdir __P((const char  *));
extern int path_dot_or_dotdot __P((const char *));
extern int absolute_pathname __P((const char *));
extern int absolute_program __P((const char *));

extern char *make_absolute __P((const char *, const char *));
extern char *base_pathname __P((char *));
extern char *full_pathname __P((char *));
extern char *polite_directory_format __P((char *));
extern char *trim_pathname __P((char *, int));
extern char *printable_filename __P((char *, int));

extern char *extract_colon_unit __P((char *, int *));

extern void tilde_initialize __P((void));
extern char *bash_tilde_find_word __P((const char *, int, int *));
extern char *bash_tilde_expand __P((const char *, int));

extern int group_member __P((gid_t));
extern char **get_group_list __P((int *));
extern int *get_group_array __P((int *));

extern char *conf_standard_path __P((void));

#endif	/* _GENERAL_H_ */
Commit	Line	Data
726f6388 JA	1	/* general.h -- defines that everybody likes to use. */
726f6388 JA	2
a0c0a00f	3	/* Copyright (C) 1993-2016 Free Software Foundation, Inc.
726f6388 JA	4
	5	This file is part of GNU Bash, the Bourne Again SHell.
	6
3185942a JA	7	Bash is free software: you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation, either version 3 of the License, or
	10	(at your option) any later version.
726f6388	11
3185942a JA	12	Bash is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
726f6388	16
3185942a JA	17	You should have received a copy of the GNU General Public License
	18	along with Bash. If not, see <http://www.gnu.org/licenses/>.
	19	*/
726f6388	20
ccc6cda3 JA	21	#if !defined (_GENERAL_H_)
ccc6cda3 JA	22	#define _GENERAL_H_
726f6388 JA	23
	24	#include "stdc.h"
	25
d166f048	26	#include "bashtypes.h"
95732b49	27	#include "chartypes.h"
d166f048	28
cce855bc JA	29	#if defined (HAVE_SYS_RESOURCE_H) && defined (RLIMTYPE)
	30	# if defined (HAVE_SYS_TIME_H)
	31	# include <sys/time.h>
	32	# endif
	33	# include <sys/resource.h>
	34	#endif
	35
d166f048 JA	36	#if defined (HAVE_STRING_H)
	37	# include <string.h>
	38	#else
	39	# include <strings.h>
	40	#endif /* !HAVE_STRING_H */
	41
f73dda09 JA	42	#if defined (HAVE_LIMITS_H)
f73dda09 JA	43	# include <limits.h>
726f6388 JA	44	#endif
726f6388 JA	45
f73dda09 JA	46	#include "xmalloc.h"
f73dda09 JA	47
ccc6cda3	48	/* NULL pointer type. */
726f6388 JA	49	#if !defined (NULL)
	50	# if defined (__STDC__)
	51	# define NULL ((void *) 0)
	52	# else
	53	# define NULL 0x0
	54	# endif /* !__STDC__ */
	55	#endif /* !NULL */
	56
7117c2d2 JA	57	/* Hardly used anymore */
7117c2d2 JA	58	#define pointer_to_int(x) (int)((char )x - (char )0)
726f6388	59
ccc6cda3 JA	60	#if defined (alpha) && defined (__GNUC__) && !defined (strchr) && !defined (__STDC__)
	61	extern char strchr (), strrchr ();
	62	#endif
	63
7117c2d2	64	#if !defined (strcpy) && (defined (HAVE_DECL_STRCPY) && !HAVE_DECL_STRCPY)
f73dda09	65	extern char strcpy __P((char , const char *));
ccc6cda3 JA	66	#endif
ccc6cda3 JA	67
726f6388	68	#if !defined (savestring)
726f6388 JA	69	# define savestring(x) (char *)strcpy (xmalloc (1 + strlen (x)), (x))
	70	#endif
	71
ccc6cda3	72	#ifndef member
0001803f	73	# define member(c, s) ((c) ? ((char )mbschr ((s), (c)) != (char )NULL) : 0)
ccc6cda3 JA	74	#endif
ccc6cda3 JA	75
726f6388 JA	76	#ifndef whitespace
	77	#define whitespace(c) (((c) == ' ') \|\| ((c) == '\t'))
	78	#endif
	79
f73dda09 JA	80	#ifndef CHAR_MAX
	81	# ifdef __CHAR_UNSIGNED__
	82	# define CHAR_MAX 0xff
	83	# else
	84	# define CHAR_MAX 0x7f
	85	# endif
726f6388 JA	86	#endif
726f6388 JA	87
f73dda09 JA	88	#ifndef CHAR_BIT
f73dda09 JA	89	# define CHAR_BIT 8
726f6388 JA	90	#endif
726f6388 JA	91
f73dda09 JA	92	/* Nonzero if the integer type T is signed. */
	93	#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
	94
	95	/* Bound on length of the string representing an integer value of type T.
	96	Subtract one for the sign bit if T is signed;
	97	302 / 1000 is log10 (2) rounded up;
	98	add one for integer division truncation;
	99	add one more for a minus sign if t is signed. */
	100	#define INT_STRLEN_BOUND(t) \
	101	((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
	102	+ 1 + TYPE_SIGNED (t))
726f6388	103
28ef6c31	104
ccc6cda3	105	/* Define exactly what a legal shell identifier consists of. */
f73dda09 JA	106	#define legal_variable_starter(c) (ISALPHA(c) \|\| (c == '_'))
f73dda09 JA	107	#define legal_variable_char(c) (ISALNUM(c) \|\| c == '_')
ccc6cda3	108
726f6388 JA	109	/* Definitions used in subst.c and by the `read' builtin for field
	110	splitting. */
	111	#define spctabnl(c) ((c) == ' ' \|\| (c) == '\t' \|\| (c) == '\n')
	112
726f6388 JA	113	/* All structs which contain a `next' field should have that field
	114	as the first field in the struct. This means that functions
	115	can be written to handle the general case for linked lists. */
	116	typedef struct g_list {
	117	struct g_list *next;
	118	} GENERIC_LIST;
	119
	120	/* Here is a generic structure for associating character strings
	121	with integers. It is used in the parser for shell tokenization. */
	122	typedef struct {
	123	char *word;
	124	int token;
	125	} STRING_INT_ALIST;
	126
a0c0a00f	127	/* A macro to avoid making an unnecessary function call. */
726f6388	128	#define REVERSE_LIST(list, type) \
7117c2d2	129	((list && list->next) ? (type)list_reverse ((GENERIC_LIST *)list) \
28ef6c31	130	: (type)(list))
726f6388 JA	131
726f6388 JA	132	#if __GNUC__ > 1
95732b49	133	# define FASTCOPY(s, d, n) __builtin_memcpy ((d), (s), (n))
726f6388	134	#else /* !__GNUC__ */
ccc6cda3 JA	135	# if !defined (HAVE_BCOPY)
ccc6cda3 JA	136	# if !defined (HAVE_MEMMOVE)
95732b49	137	# define FASTCOPY(s, d, n) memcpy ((d), (s), (n))
726f6388	138	# else
95732b49	139	# define FASTCOPY(s, d, n) memmove ((d), (s), (n))
ccc6cda3 JA	140	# endif /* !HAVE_MEMMOVE */
ccc6cda3 JA	141	# else /* HAVE_BCOPY */
95732b49	142	# define FASTCOPY(s, d, n) bcopy ((s), (d), (n))
ccc6cda3	143	# endif /* HAVE_BCOPY */
726f6388 JA	144	#endif /* !__GNUC__ */
	145
	146	/* String comparisons that possibly save a function call each. */
	147	#define STREQ(a, b) ((a)[0] == (b)[0] && strcmp(a, b) == 0)
bb70624e JA	148	#define STREQN(a, b, n) ((n == 0) ? (1) \
bb70624e JA	149	: ((a)[0] == (b)[0] && strncmp(a, b, n) == 0))
726f6388 JA	150
	151	/* More convenience definitions that possibly save system or libc calls. */
	152	#define STRLEN(s) (((s) && (s)[0]) ? ((s)[1] ? ((s)[2] ? strlen(s) : 2) : 1) : 0)
	153	#define FREE(s) do { if (s) free (s); } while (0)
cce855bc	154	#define MEMBER(c, s) (((c) && c == (s)[0] && !(s)[1]) \|\| (member(c, s)))
726f6388	155
ccc6cda3 JA	156	/* A fairly hairy macro to check whether an allocated string has more room,
	157	and to resize it using xrealloc if it does not.
	158	STR is the string (char *)
	159	CIND is the current index into the string (int)
	160	ROOM is the amount of additional room we need in the string (int)
	161	CSIZE is the currently-allocated size of STR (int)
	162	SINCR is how much to increment CSIZE before calling xrealloc (int) */
	163
	164	#define RESIZE_MALLOCED_BUFFER(str, cind, room, csize, sincr) \
	165	do { \
	166	if ((cind) + (room) >= csize) \
	167	{ \
	168	while ((cind) + (room) >= csize) \
	169	csize += (sincr); \
	170	str = xrealloc (str, csize); \
	171	} \
	172	} while (0)
726f6388 JA	173
726f6388 JA	174	/* Function pointers can be declared as (Function )foo. /
ccc6cda3 JA	175	#if !defined (_FUNCTION_DEF)
ccc6cda3 JA	176	# define _FUNCTION_DEF
726f6388 JA	177	typedef int Function ();
726f6388 JA	178	typedef void VFunction ();
f73dda09 JA	179	typedef char CPFunction (); / no longer used */
f73dda09 JA	180	typedef char *CPPFunction (); / no longer used */
726f6388 JA	181	#endif /* _FUNCTION_DEF */
726f6388 JA	182
f73dda09 JA	183	#ifndef SH_FUNCTION_TYPEDEF
	184	# define SH_FUNCTION_TYPEDEF
	185
	186	/* Shell function typedefs with prototypes */
	187	/* `Generic' function pointer typedefs */
	188
	189	typedef int sh_intfunc_t __P((int));
	190	typedef int sh_ivoidfunc_t __P((void));
	191	typedef int sh_icpfunc_t __P((char *));
	192	typedef int sh_icppfunc_t __P((char **));
	193	typedef int sh_iptrfunc_t __P((PTR_T));
	194
	195	typedef void sh_voidfunc_t __P((void));
	196	typedef void sh_vintfunc_t __P((int));
	197	typedef void sh_vcpfunc_t __P((char *));
	198	typedef void sh_vcppfunc_t __P((char **));
	199	typedef void sh_vptrfunc_t __P((PTR_T));
	200
	201	typedef int sh_wdesc_func_t __P((WORD_DESC *));
	202	typedef int sh_wlist_func_t __P((WORD_LIST *));
	203
	204	typedef int sh_glist_func_t __P((GENERIC_LIST *));
	205
	206	typedef char sh_string_func_t __P((char )); /* like savestring, et al. */
	207
	208	typedef int sh_msg_func_t __P((const char , ...)); / printf(3)-like */
	209	typedef void sh_vmsg_func_t __P((const char , ...)); / printf(3)-like */
	210
	211	/* Specific function pointer typedefs. Most of these could be done
	212	with #defines. */
	213	typedef void sh_sv_func_t __P((char )); / sh_vcpfunc_t */
	214	typedef void sh_free_func_t __P((PTR_T)); /* sh_vptrfunc_t */
	215	typedef void sh_resetsig_func_t __P((int)); /* sh_vintfunc_t */
	216
	217	typedef int sh_ignore_func_t __P((const char )); / sh_icpfunc_t */
	218
495aee44 CR	219	typedef int sh_assign_func_t __P((const char *));
495aee44 CR	220	typedef int sh_wassign_func_t __P((WORD_DESC *, int));
f73dda09	221
a0c0a00f CR	222	typedef int sh_load_func_t __P((char *));
	223	typedef void sh_unload_func_t __P((char *));
	224
f73dda09 JA	225	typedef int sh_builtin_func_t __P((WORD_LIST )); / sh_wlist_func_t */
	226
	227	#endif /* SH_FUNCTION_TYPEDEF */
	228
726f6388 JA	229	#define NOW ((time_t) time ((time_t *) 0))
	230
	231	/* Some defines for calling file status functions. */
	232	#define FS_EXISTS 0x1
	233	#define FS_EXECABLE 0x2
	234	#define FS_EXEC_PREFERRED 0x4
	235	#define FS_EXEC_ONLY 0x8
ccc6cda3 JA	236	#define FS_DIRECTORY 0x10
ccc6cda3 JA	237	#define FS_NODIRS 0x20
95732b49	238	#define FS_READABLE 0x40
726f6388	239
7117c2d2 JA	240	/* Default maximum for move_to_high_fd */
	241	#define HIGH_FD_MAX 256
	242
f73dda09 JA	243	/* The type of function passed as the fourth argument to qsort(3). */
	244	#ifdef __STDC__
	245	typedef int QSFUNC (const void , const void );
	246	#else
	247	typedef int QSFUNC ();
	248	#endif
	249
28ef6c31 JA	250	/* Some useful definitions for Unix pathnames. Argument convention:
	251	x == string, c == character */
	252
	253	#if !defined (__CYGWIN__)
	254	# define ABSPATH(x) ((x)[0] == '/')
	255	# define RELPATH(x) ((x)[0] != '/')
	256	#else /* __CYGWIN__ */
95732b49 JA	257	# define ABSPATH(x) (((x)[0] && ISALPHA((unsigned char)(x)[0]) && (x)[1] == ':') \|\| ISDIRSEP((x)[0]))
95732b49 JA	258	# define RELPATH(x) (ABSPATH(x) == 0)
28ef6c31 JA	259	#endif /* __CYGWIN__ */
	260
	261	#define ROOTEDPATH(x) (ABSPATH(x))
	262
	263	#define DIRSEP '/'
95732b49 JA	264	#if !defined (__CYGWIN__)
	265	# define ISDIRSEP(c) ((c) == '/')
	266	#else
	267	# define ISDIRSEP(c) ((c) == '/' \|\| (c) == '\\')
	268	#endif /* __CYGWIN__ */
28ef6c31 JA	269	#define PATHSEP(c) (ISDIRSEP(c) \|\| (c) == 0)
28ef6c31 JA	270
f73dda09	271	#if 0
ccc6cda3	272	/* Declarations for functions defined in xmalloc.c */
f73dda09 JA	273	extern PTR_T xmalloc __P((size_t));
f73dda09 JA	274	extern PTR_T xrealloc __P((void *, size_t));
bb70624e	275	extern void xfree __P((void *));
f73dda09	276	#endif
726f6388	277
ccc6cda3 JA	278	/* Declarations for functions defined in general.c */
ccc6cda3 JA	279	extern void posix_initialize __P((int));
726f6388	280
ccc6cda3 JA	281	#if defined (RLIMTYPE)
	282	extern RLIMTYPE string_to_rlimtype __P((char *));
	283	extern void print_rlimtype __P((RLIMTYPE, int));
	284	#endif
726f6388	285
a0c0a00f	286	extern int all_digits __P((const char *));
3185942a	287	extern int legal_number __P((const char , intmax_t ));
a0c0a00f CR	288	extern int legal_identifier __P((const char *));
	289	extern int importable_function_name __P((const char *, size_t));
	290	extern int exportable_function_name __P((const char *));
726f6388	291	extern int check_identifier __P((WORD_DESC *, int));
a0c0a00f CR	292	extern int valid_nameref_value __P((const char *, int));
	293	extern int check_selfref __P((const char , char , int));
	294	extern int legal_alias_name __P((const char *, int));
b80f6443	295	extern int assignment __P((const char *, int));
ccc6cda3	296
28ef6c31	297	extern int sh_unset_nodelay_mode __P((int));
7117c2d2	298	extern int sh_validfd __P((int));
495aee44	299	extern int fd_ispipe __P((int));
ccc6cda3	300	extern void check_dev_tty __P((void));
d166f048	301	extern int move_to_high_fd __P((int, int, int));
a0c0a00f	302	extern int check_binary_file __P((const char *, int));
f73dda09 JA	303
f73dda09 JA	304	#ifdef _POSIXSTAT_H_
a0c0a00f	305	extern int same_file __P((const char , const char , struct stat , struct stat ));
f73dda09	306	#endif
ccc6cda3	307
3185942a JA	308	extern int sh_openpipe __P((int *));
	309	extern int sh_closepipe __P((int *));
	310
a0c0a00f CR	311	extern int file_exists __P((const char *));
	312	extern int file_isdir __P((const char *));
	313	extern int file_iswdir __P((const char *));
ac50fbac	314	extern int path_dot_or_dotdot __P((const char *));
f73dda09 JA	315	extern int absolute_pathname __P((const char *));
f73dda09 JA	316	extern int absolute_program __P((const char *));
95732b49	317
a0c0a00f	318	extern char make_absolute __P((const char , const char *));
726f6388 JA	319	extern char base_pathname __P((char ));
726f6388 JA	320	extern char full_pathname __P((char ));
726f6388	321	extern char polite_directory_format __P((char ));
3185942a	322	extern char trim_pathname __P((char , int));
a0c0a00f	323	extern char printable_filename __P((char , int));
726f6388	324
ccc6cda3	325	extern char extract_colon_unit __P((char , int *));
726f6388	326
ccc6cda3	327	extern void tilde_initialize __P((void));
95732b49	328	extern char bash_tilde_find_word __P((const char , int, int *));
7117c2d2	329	extern char bash_tilde_expand __P((const char , int));
726f6388	330
d166f048	331	extern int group_member __P((gid_t));
d166f048	332	extern char *get_group_list __P((int ));
b72432fd	333	extern int get_group_array __P((int ));
d166f048	334
a0c0a00f CR	335	extern char *conf_standard_path __P((void));
a0c0a00f CR	336
ccc6cda3	337	#endif /* _GENERAL_H_ */