Adding upstream version 5.2.37.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
This commit is contained in:
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1435 changed files with 757174 additions and 0 deletions
372
general.h
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372
general.h
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/* general.h -- defines that everybody likes to use. */
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/* Copyright (C) 1993-2021 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined (_GENERAL_H_)
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#define _GENERAL_H_
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#include "stdc.h"
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#include "bashtypes.h"
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#include "chartypes.h"
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#if defined (HAVE_SYS_RESOURCE_H) && defined (RLIMTYPE)
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# if defined (HAVE_SYS_TIME_H)
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# include <sys/time.h>
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# endif
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# include <sys/resource.h>
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#endif
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#if defined (HAVE_STRING_H)
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# include <string.h>
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#else
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# include <strings.h>
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#endif /* !HAVE_STRING_H */
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#if defined (HAVE_LIMITS_H)
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# include <limits.h>
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#endif
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#include "xmalloc.h"
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/* NULL pointer type. */
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#if !defined (NULL)
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# if defined (__STDC__)
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# define NULL ((void *) 0)
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# else
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# define NULL 0x0
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# endif /* !__STDC__ */
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#endif /* !NULL */
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/* Hardly used anymore */
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#define pointer_to_int(x) (int)((char *)x - (char *)0)
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#if defined (alpha) && defined (__GNUC__) && !defined (strchr) && !defined (__STDC__)
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extern char *strchr (), *strrchr ();
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#endif
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#if !defined (strcpy) && (defined (HAVE_DECL_STRCPY) && !HAVE_DECL_STRCPY)
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extern char *strcpy PARAMS((char *, const char *));
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#endif
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#if !defined (savestring)
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# define savestring(x) (char *)strcpy (xmalloc (1 + strlen (x)), (x))
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#endif
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#ifndef member
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# define member(c, s) ((c) ? ((char *)mbschr ((s), (c)) != (char *)NULL) : 0)
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#endif
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#ifndef whitespace
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#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
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#endif
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#ifndef CHAR_MAX
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# ifdef __CHAR_UNSIGNED__
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# define CHAR_MAX 0xff
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# else
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# define CHAR_MAX 0x7f
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# endif
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#endif
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#ifndef CHAR_BIT
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# define CHAR_BIT 8
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#endif
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/* Nonzero if the integer type T is signed. */
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#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
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/* The width in bits of the integer type or expression T.
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Padding bits are not supported; this is checked at compile-time below. */
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#define TYPE_WIDTH(t) (sizeof (t) * CHAR_BIT)
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/* Bound on length of the string representing an unsigned integer
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value representable in B bits. log10 (2.0) < 146/485. The
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smallest value of B where this bound is not tight is 2621. */
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#define INT_BITS_STRLEN_BOUND(b) (((b) * 146 + 484) / 485)
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/* Bound on length of the string representing an integer value of type T.
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Subtract one for the sign bit if T is signed;
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302 / 1000 is log10 (2) rounded up;
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add one for integer division truncation;
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add one more for a minus sign if t is signed. */
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#define INT_STRLEN_BOUND(t) \
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((TYPE_WIDTH (t) - TYPE_SIGNED (t)) * 302 / 1000 \
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+ 1 + TYPE_SIGNED (t))
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/* Updated version adapted from gnulib/intprops.h, not used right now.
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Changes the approximation of log10(2) from 302/1000 to 146/485. */
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#if 0
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#define INT_STRLEN_BOUND(t) \
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(INT_BITS_STRLEN_BOUND (TYPE_WIDTH (t) - TYPE_SIGNED (t)) + TYPE_SIGNED(t))
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#endif
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/* Bound on buffer size needed to represent an integer type or expression T,
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including the terminating null. */
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#define INT_BUFSIZE_BOUND(t) (INT_STRLEN_BOUND (t) + 1)
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/* Define exactly what a legal shell identifier consists of. */
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#define legal_variable_starter(c) (ISALPHA(c) || (c == '_'))
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#define legal_variable_char(c) (ISALNUM(c) || c == '_')
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/* Definitions used in subst.c and by the `read' builtin for field
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splitting. */
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#define spctabnl(c) ((c) == ' ' || (c) == '\t' || (c) == '\n')
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/* All structs which contain a `next' field should have that field
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as the first field in the struct. This means that functions
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can be written to handle the general case for linked lists. */
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typedef struct g_list {
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struct g_list *next;
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} GENERIC_LIST;
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/* Here is a generic structure for associating character strings
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with integers. It is used in the parser for shell tokenization. */
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typedef struct {
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char *word;
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int token;
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} STRING_INT_ALIST;
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/* A macro to avoid making an unnecessary function call. */
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#define REVERSE_LIST(list, type) \
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((list && list->next) ? (type)list_reverse ((GENERIC_LIST *)list) \
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: (type)(list))
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#if __GNUC__ > 1
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# define FASTCOPY(s, d, n) __builtin_memcpy ((d), (s), (n))
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#else /* !__GNUC__ */
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# if !defined (HAVE_BCOPY)
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# if !defined (HAVE_MEMMOVE)
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# define FASTCOPY(s, d, n) memcpy ((d), (s), (n))
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# else
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# define FASTCOPY(s, d, n) memmove ((d), (s), (n))
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# endif /* !HAVE_MEMMOVE */
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# else /* HAVE_BCOPY */
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# define FASTCOPY(s, d, n) bcopy ((s), (d), (n))
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# endif /* HAVE_BCOPY */
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#endif /* !__GNUC__ */
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/* String comparisons that possibly save a function call each. */
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#define STREQ(a, b) ((a)[0] == (b)[0] && strcmp(a, b) == 0)
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#define STREQN(a, b, n) ((n == 0) ? (1) \
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: ((a)[0] == (b)[0] && strncmp(a, b, n) == 0))
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/* More convenience definitions that possibly save system or libc calls. */
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#define STRLEN(s) (((s) && (s)[0]) ? ((s)[1] ? ((s)[2] ? strlen(s) : 2) : 1) : 0)
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#define FREE(s) do { if (s) free (s); } while (0)
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#define MEMBER(c, s) (((c) && c == (s)[0] && !(s)[1]) || (member(c, s)))
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/* A fairly hairy macro to check whether an allocated string has more room,
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and to resize it using xrealloc if it does not.
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STR is the string (char *)
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CIND is the current index into the string (int)
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ROOM is the amount of additional room we need in the string (int)
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CSIZE is the currently-allocated size of STR (int)
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SINCR is how much to increment CSIZE before calling xrealloc (int) */
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#define RESIZE_MALLOCED_BUFFER(str, cind, room, csize, sincr) \
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do { \
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if ((cind) + (room) >= csize) \
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{ \
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while ((cind) + (room) >= csize) \
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csize += (sincr); \
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str = xrealloc (str, csize); \
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} \
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} while (0)
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/* Function pointers can be declared as (Function *)foo. */
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#if !defined (_FUNCTION_DEF)
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# define _FUNCTION_DEF
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typedef int Function ();
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typedef void VFunction ();
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typedef char *CPFunction (); /* no longer used */
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typedef char **CPPFunction (); /* no longer used */
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#endif /* _FUNCTION_DEF */
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#ifndef SH_FUNCTION_TYPEDEF
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# define SH_FUNCTION_TYPEDEF
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/* Shell function typedefs with prototypes */
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/* `Generic' function pointer typedefs */
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typedef int sh_intfunc_t PARAMS((int));
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typedef int sh_ivoidfunc_t PARAMS((void));
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typedef int sh_icpfunc_t PARAMS((char *));
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typedef int sh_icppfunc_t PARAMS((char **));
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typedef int sh_iptrfunc_t PARAMS((PTR_T));
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typedef void sh_voidfunc_t PARAMS((void));
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typedef void sh_vintfunc_t PARAMS((int));
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typedef void sh_vcpfunc_t PARAMS((char *));
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typedef void sh_vcppfunc_t PARAMS((char **));
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typedef void sh_vptrfunc_t PARAMS((PTR_T));
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typedef int sh_wdesc_func_t PARAMS((WORD_DESC *));
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typedef int sh_wlist_func_t PARAMS((WORD_LIST *));
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typedef int sh_glist_func_t PARAMS((GENERIC_LIST *));
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typedef char *sh_string_func_t PARAMS((char *)); /* like savestring, et al. */
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typedef int sh_msg_func_t PARAMS((const char *, ...)); /* printf(3)-like */
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typedef void sh_vmsg_func_t PARAMS((const char *, ...)); /* printf(3)-like */
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/* Specific function pointer typedefs. Most of these could be done
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with #defines. */
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typedef void sh_sv_func_t PARAMS((char *)); /* sh_vcpfunc_t */
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typedef void sh_free_func_t PARAMS((PTR_T)); /* sh_vptrfunc_t */
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typedef void sh_resetsig_func_t PARAMS((int)); /* sh_vintfunc_t */
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typedef int sh_ignore_func_t PARAMS((const char *)); /* sh_icpfunc_t */
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typedef int sh_assign_func_t PARAMS((const char *));
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typedef int sh_wassign_func_t PARAMS((WORD_DESC *, int));
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typedef int sh_load_func_t PARAMS((char *));
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typedef void sh_unload_func_t PARAMS((char *));
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typedef int sh_builtin_func_t PARAMS((WORD_LIST *)); /* sh_wlist_func_t */
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#endif /* SH_FUNCTION_TYPEDEF */
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#define NOW ((time_t) time ((time_t *) 0))
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#define GETTIME(tv) gettimeofday(&(tv), NULL)
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/* Some defines for calling file status functions. */
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#define FS_EXISTS 0x1
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#define FS_EXECABLE 0x2
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#define FS_EXEC_PREFERRED 0x4
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#define FS_EXEC_ONLY 0x8
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#define FS_DIRECTORY 0x10
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#define FS_NODIRS 0x20
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#define FS_READABLE 0x40
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/* Default maximum for move_to_high_fd */
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#define HIGH_FD_MAX 256
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/* The type of function passed as the fourth argument to qsort(3). */
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#ifdef __STDC__
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typedef int QSFUNC (const void *, const void *);
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#else
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typedef int QSFUNC ();
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#endif
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/* Some useful definitions for Unix pathnames. Argument convention:
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x == string, c == character */
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#if !defined (__CYGWIN__)
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# define ABSPATH(x) ((x)[0] == '/')
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# define RELPATH(x) ((x)[0] != '/')
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#else /* __CYGWIN__ */
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# define ABSPATH(x) (((x)[0] && ISALPHA((unsigned char)(x)[0]) && (x)[1] == ':') || ISDIRSEP((x)[0]))
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# define RELPATH(x) (ABSPATH(x) == 0)
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#endif /* __CYGWIN__ */
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#define ROOTEDPATH(x) (ABSPATH(x))
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#define DIRSEP '/'
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#if !defined (__CYGWIN__)
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# define ISDIRSEP(c) ((c) == '/')
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#else
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# define ISDIRSEP(c) ((c) == '/' || (c) == '\\')
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#endif /* __CYGWIN__ */
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#define PATHSEP(c) (ISDIRSEP(c) || (c) == 0)
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#define DOT_OR_DOTDOT(s) (s[0] == '.' && (s[1] == 0 || (s[1] == '.' && s[2] == 0)))
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#if defined (HANDLE_MULTIBYTE)
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#define WDOT_OR_DOTDOT(w) (w[0] == L'.' && (w[1] == L'\0' || (w[1] == L'.' && w[2] == L'\0')))
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#endif
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#if 0
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/* Declarations for functions defined in xmalloc.c */
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extern PTR_T xmalloc PARAMS((size_t));
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extern PTR_T xrealloc PARAMS((void *, size_t));
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extern void xfree PARAMS((void *));
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#endif
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/* Declarations for functions defined in general.c */
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extern void posix_initialize PARAMS((int));
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extern int num_posix_options PARAMS((void));
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extern char *get_posix_options PARAMS((char *));
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extern void set_posix_options PARAMS((const char *));
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extern void save_posix_options PARAMS((void));
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#if defined (RLIMTYPE)
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extern RLIMTYPE string_to_rlimtype PARAMS((char *));
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extern void print_rlimtype PARAMS((RLIMTYPE, int));
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#endif
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extern int all_digits PARAMS((const char *));
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extern int legal_number PARAMS((const char *, intmax_t *));
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extern int legal_identifier PARAMS((const char *));
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extern int importable_function_name PARAMS((const char *, size_t));
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extern int exportable_function_name PARAMS((const char *));
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extern int check_identifier PARAMS((WORD_DESC *, int));
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extern int valid_nameref_value PARAMS((const char *, int));
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extern int check_selfref PARAMS((const char *, char *, int));
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extern int legal_alias_name PARAMS((const char *, int));
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extern int line_isblank PARAMS((const char *));
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extern int assignment PARAMS((const char *, int));
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extern int sh_unset_nodelay_mode PARAMS((int));
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extern int sh_setclexec PARAMS((int));
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extern int sh_validfd PARAMS((int));
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extern int fd_ispipe PARAMS((int));
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extern void check_dev_tty PARAMS((void));
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extern int move_to_high_fd PARAMS((int, int, int));
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extern int check_binary_file PARAMS((const char *, int));
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#ifdef _POSIXSTAT_H_
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extern int same_file PARAMS((const char *, const char *, struct stat *, struct stat *));
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#endif
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extern int sh_openpipe PARAMS((int *));
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extern int sh_closepipe PARAMS((int *));
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extern int file_exists PARAMS((const char *));
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extern int file_isdir PARAMS((const char *));
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extern int file_iswdir PARAMS((const char *));
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extern int path_dot_or_dotdot PARAMS((const char *));
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extern int absolute_pathname PARAMS((const char *));
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extern int absolute_program PARAMS((const char *));
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extern char *make_absolute PARAMS((const char *, const char *));
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extern char *base_pathname PARAMS((char *));
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extern char *full_pathname PARAMS((char *));
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extern char *polite_directory_format PARAMS((char *));
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extern char *trim_pathname PARAMS((char *, int));
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extern char *printable_filename PARAMS((char *, int));
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extern char *extract_colon_unit PARAMS((char *, int *));
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extern void tilde_initialize PARAMS((void));
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extern char *bash_tilde_find_word PARAMS((const char *, int, int *));
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extern char *bash_tilde_expand PARAMS((const char *, int));
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extern int group_member PARAMS((gid_t));
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extern char **get_group_list PARAMS((int *));
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extern int *get_group_array PARAMS((int *));
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extern char *conf_standard_path PARAMS((void));
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extern int default_columns PARAMS((void));
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#endif /* _GENERAL_H_ */
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