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sh.h
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/* $OpenBSD: sh.h,v 1.35 2015/09/10 22:48:58 nicm Exp $ */
/* $OpenBSD: shf.h,v 1.6 2005/12/11 18:53:51 deraadt Exp $ */
/* $OpenBSD: table.h,v 1.8 2012/02/19 07:52:30 otto Exp $ */
/* $OpenBSD: tree.h,v 1.10 2005/03/28 21:28:22 deraadt Exp $ */
/* $OpenBSD: expand.h,v 1.7 2015/09/01 13:12:31 tedu Exp $ */
/* $OpenBSD: lex.h,v 1.13 2013/03/03 19:11:34 guenther Exp $ */
/* $OpenBSD: proto.h,v 1.35 2013/09/04 15:49:19 millert Exp $ */
/* $OpenBSD: c_test.h,v 1.4 2004/12/20 11:34:26 otto Exp $ */
/* $OpenBSD: tty.h,v 1.5 2004/12/20 11:34:26 otto Exp $ */
/*-
* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
* 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018,
* 2019, 2020, 2021, 2022, 2023, 2025
* mirabilos <m$(date +%Y)@mirbsd.de>
*
* Provided that these terms and disclaimer and all copyright notices
* are retained or reproduced in an accompanying document, permission
* is granted to deal in this work without restriction, including un-
* limited rights to use, publicly perform, distribute, sell, modify,
* merge, give away, or sublicence.
*
* This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
* the utmost extent permitted by applicable law, neither express nor
* implied; without malicious intent or gross negligence. In no event
* may a licensor, author or contributor be held liable for indirect,
* direct, other damage, loss, or other issues arising in any way out
* of dealing in the work, even if advised of the possibility of such
* damage or existence of a defect, except proven that it results out
* of said person's immediate fault when using the work as intended.
*/
#define MKSH_SH_H_ID "$MirOS: src/bin/mksh/sh.h,v 1.1035 2025/04/26 22:40:50 tg Exp $"
#ifdef MKSH_USE_AUTOCONF_H
/* things that “should” have been on the command line */
#include "autoconf.h"
#undef MKSH_USE_AUTOCONF_H
#endif
#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <sys/types.h>
#if HAVE_BOTH_TIME_H && HAVE_SELECT_TIME_H
#include <sys/time.h>
#include <time.h>
#elif HAVE_SYS_TIME_H && HAVE_SELECT_TIME_H
#include <sys/time.h>
#elif HAVE_TIME_H
#include <time.h>
#endif
#if HAVE_SYS_BSDTYPES_H
#include <sys/bsdtypes.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#if HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#include <sys/ioctl.h>
#if HAVE_SYS_SYSMACROS_H
#include <sys/sysmacros.h>
#endif
#if HAVE_SYS_MKDEV_H
#include <sys/mkdev.h>
#endif
#if HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#if HAVE_SYS_PTEM_H
/* prerequisite */
#include <sys/stream.h>
/* struct winsize */
#include <sys/ptem.h>
#endif
#if defined(HAVE_GETRANDOM) && (HAVE_GETRANDOM)
#include <sys/random.h>
#endif
#if HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#include <sys/stat.h>
#if !HAVE_GETRUSAGE
#include <sys/times.h>
#endif
#include <sys/wait.h>
#ifdef DEBUG
#include <assert.h>
#endif
#if HAVE_SELECT && HAVE_BSTRING_H
#include <bstring.h>
#endif
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#if HAVE_GRP_H
#include <grp.h>
#endif
#if HAVE_IO_H
#include <io.h>
#endif
#if HAVE_LIBGEN_H
#include <libgen.h>
#endif
#if HAVE_LIBUTIL_H
#include <libutil.h>
#endif
#include <limits.h>
#if defined(MKSH_EBCDIC) || defined(MKSH_FAUX_EBCDIC) || HAVE_POSIX_UTF8_LOCALE
#include <locale.h>
#if HAVE_POSIX_UTF8_LOCALE
#include <langinfo.h>
#endif
#endif
#if HAVE_PATHS_H
#include <paths.h>
#endif
#ifdef MKSH_POLL_FOR_PAUSE
#include <poll.h>
#endif
#ifndef MKSH_NOPWNAM
#include <pwd.h>
#endif
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stddef.h>
#if HAVE_STDINT_H
#include <stdint.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if HAVE_STRINGS_H
#include <strings.h>
#endif
#if HAVE_TERMIOS_H
#include <termios.h>
#else
/* shudder… */
#include <termio.h>
#endif
#ifdef _ISC_UNIX
/* XXX imake style */
#include <sys/sioctl.h>
#endif
#if HAVE_ULIMIT_H
#include <ulimit.h>
#endif
#include <unistd.h>
#ifdef MIRBSD_BOOTFLOPPY
#include <wchar.h>
#endif
#undef MBSDINT_H_SKIP_CTAS
#ifndef MKSH_DO_MBI_CTAS
#define MBSDINT_H_SKIP_CTAS
#endif
/* formatting routines assume this */
#define MBSDINT_H_WANT_PTR_IN_SIZET 1
#define MBSDINT_H_WANT_SIZET_IN_LONG 1
/* POSIX guarantees a 32-bit int */
#define MBSDINT_H_WANT_INT32 1
/* the code cannot cope without yet */
#define MBSDINT_H_WANT_SAFEC 1
#include "mbsdcc.h"
#include "mbsdint.h"
/* monkey-patch nil pointer constant */
#undef NULL
#define NULL mbnil
/* conflict with GCC attributes; fixed in later dietlibcs */
#ifdef __dietlibc__
#undef __noinline__
#endif
#undef __attribute__
#if HAVE_ATTRIBUTE_BOUNDED
#define MKSH_A_BOUNDED(x,y,z) __attribute__((__bounded__(x, y, z)))
#else
#define MKSH_A_BOUNDED(x,y,z) /* nothing */
#endif
#if HAVE_ATTRIBUTE_FORMAT
#define MKSH_A_FORMAT(x,y,z) __attribute__((__format__(x, y, z)))
#else
#define MKSH_A_FORMAT(x,y,z) /* nothing */
#endif
#if HAVE_ATTRIBUTE_NORETURN
#define MKSH_A_NORETURN __attribute__((__noreturn__))
#else
#define MKSH_A_NORETURN /* nothing */
#endif
#if HAVE_ATTRIBUTE_UNUSED
#define MKSH_A_UNUSED __attribute__((__unused__))
#else
#define MKSH_A_UNUSED /* nothing */
#endif
#if HAVE_ATTRIBUTE_USED
#define MKSH_A_USED __attribute__((__used__))
#else
#define MKSH_A_USED /* nothing */
#endif
#if defined(MirBSD) && (MirBSD >= 0x09A1) && \
defined(__ELF__) && defined(__GNUC__) && \
!defined(__llvm__) && !defined(__NWCC__)
/*
* We got usable __IDSTRING __COPYRIGHT __RCSID __SCCSID macros
* which work for all cases; no need to redefine them using the
* "portable" macros from below when we might have the "better"
* gcc+ELF specific macros or other system dependent ones.
*/
#else
#undef __IDSTRING
#undef __IDSTRING_CONCAT
#undef __IDSTRING_EXPAND
#undef __COPYRIGHT
#undef __RCSID
#undef __SCCSID
#define __IDSTRING_CONCAT(l,p) __LINTED__ ## l ## _ ## p
#define __IDSTRING_EXPAND(l,p) __IDSTRING_CONCAT(l,p)
#ifdef MKSH_DONT_EMIT_IDSTRING
#define __IDSTRING(prefix,string) /* nothing */
#elif defined(__ELF__) && defined(__GNUC__) && \
!(defined(__GNUC__) && defined(__mips16) && (__GNUC__ >= 8)) && \
!defined(__llvm__) && !defined(__NWCC__) && !defined(NO_ASM)
#define __IDSTRING(prefix,string) \
__asm__(".section .comment" \
"\n .ascii \"@(\"\"#)" #prefix ": \"" \
"\n .asciz \"" string "\"" \
"\n .previous")
#else
#define __IDSTRING(prefix,string) \
static const char __IDSTRING_EXPAND(__LINE__,prefix) [] \
MKSH_A_USED = "@(""#)" #prefix ": " string
#endif
#define __COPYRIGHT(x) __IDSTRING(copyright,x)
#define __RCSID(x) __IDSTRING(rcsid,x)
#define __SCCSID(x) __IDSTRING(sccsid,x)
#endif
#define MKSH_VERSION "R59 2025/04/26"
/* shell types */
typedef unsigned char kby; /* byte */
typedef unsigned int kui; /* wchar; kby or EOF; ⊇k32; etc. */
/* MBSDINT_H_WANT_INT32 guaranteed; u_int rank also guaranteed */
typedef unsigned int k32; /* 32-bit arithmetic (hashes etc.) */
/* for use with/without 32-bit masking */
typedef unsigned long kul; /* long, arithmetic */
typedef signed long ksl; /* signed long, arithmetic */
#define KUL_FM ULONG_MAX
#define KUL_HM LONG_MAX
/* if mbiHUGE is wider than long, then that, else long */
#if mbiHUGE_UBITS > mbiMASK__BITS(ULONG_MAX)
#define MKSH_HAVE_HUGE
typedef mbiHUGE_U kuH;
typedef mbiHUGE_S ksH;
#define KUH_FM mbiHUGE_U_MAX
#define KUH_HM mbiHUGE_S_MAX
#else
#undef MKSH_HAVE_HUGE
typedef kul kuH;
typedef ksl ksH;
#define KUH_FM ULONG_MAX
#define KUH_HM LONG_MAX
#endif
#define KBY(c) ((kby)(KUI(c) & 0xFFU)) /* byte, truncated if necessary */
#define KBI(c) ((kui)(KUI(c) & 0xFFU)) /* byte as u_int, truncated */
#define KUI(u) ((kui)(u)) /* int as u_int, not truncated */
#define K32_HM 0x7FFFFFFFUL
#define K32_FM 0xFFFFFFFFUL
/*XXX TODO:
* arithmetic type need not be long, it can be unsigned int if we can
* guarantee that it’s exactly⚠ 32 bit wide; in the !lksh case, never
* shall a signed integer be needed; for lksh signed arithmetic, only
* I think, the values need to be converted temporarily; !lksh signed
* arithmetic is instead done in unsigned; kul → kua (ksl → ksa lksh)
*/
#ifdef MKSH_LEGACY_MODE
#define KUA_HM LONG_MAX
#define KUA_FM ULONG_MAX
#else
#define KUA_HM K32_HM
#define KUA_FM K32_FM
#endif
/* arithmetic types: shell arithmetics */
/* new arithmetics tbd, using mbiMA_* */
/* older arithmetics, to be replaced later */
#ifdef MKSH_LEGACY_MODE
/*
* POSIX demands these to be the C environment's long type
*/
typedef long mksh_ari_t;
typedef unsigned long mksh_uari_t;
#else
/*
* These types are exactly 32 bit wide; signed and unsigned
* integer wraparound, even across division and modulo, for
* any shell code using them, is guaranteed.
*/
#if HAVE_CAN_INTTYPES
typedef int32_t mksh_ari_t;
typedef uint32_t mksh_uari_t;
#else
/* relies on compile-time asserts and CFLAGS to validate that */
typedef signed int mksh_ari_t;
typedef unsigned int mksh_uari_t;
#define INT32_MIN INT_MIN
#define INT32_MAX INT_MAX
#define UINT32_MAX UINT_MAX
#endif
#endif
/* new arithmetics in preparation */
/* boolean type (no <stdbool.h> deliberately) */
typedef unsigned char Wahr;
#define Ja 1U
#define Nee 0U
#define isWahr(cond) ((cond) ? Ja : Nee)
/* other standard types */
#if !HAVE_SIG_T
#undef sig_t
typedef void (*sig_t)(int);
#endif
#ifdef MKSH_TYPEDEF_SIG_ATOMIC_T
typedef MKSH_TYPEDEF_SIG_ATOMIC_T sig_atomic_t;
#endif
#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
#define MKSH_SHF_NO_INLINE
#endif
/* do not merge these conditionals as neatcc’s preprocessor is simple */
#ifdef __neatcc__
/* parsing of comma operator <,> in expressions broken */
#define MKSH_SHF_NO_INLINE
#endif
/* un-do vendor damage */
#undef BAD /* AIX defines that somewhere */
#undef PRINT /* LynxOS defines that somewhere */
#undef flock /* SCO UnixWare defines that to flock64 but ENOENT */
#ifndef MKSH_INCLUDES_ONLY
/* EBCDIC fun */
/* see the large comment in shf.c for an EBCDIC primer */
#if defined(MKSH_FOR_Z_OS) && defined(__MVS__) && defined(__IBMC__) && defined(__CHARSET_LIB)
# if !__CHARSET_LIB && !defined(MKSH_EBCDIC)
# error "Please compile with Build.sh -E for EBCDIC!"
# endif
# if __CHARSET_LIB && defined(MKSH_EBCDIC)
# error "Please compile without -E argument to Build.sh for ASCII!"
# endif
#endif
/* extra types */
/* getrusage does not exist on OS/2 kLIBC and is stubbed on SerenityOS */
#if !HAVE_GETRUSAGE
#undef rusage
#undef RUSAGE_SELF
#undef RUSAGE_CHILDREN
#define rusage mksh_rusage
#define RUSAGE_SELF 0
#define RUSAGE_CHILDREN -1
struct rusage {
struct timeval ru_utime;
struct timeval ru_stime;
};
extern int ksh_getrusage(int, struct rusage *);
#else
#define ksh_getrusage getrusage
#endif
/* extra macros */
#ifndef timerclear
#define timerclear(tvp) \
do { \
(tvp)->tv_sec = (tvp)->tv_usec = 0; \
} while (/* CONSTCOND */ 0)
#endif
#ifndef timeradd
#define timeradd(tvp,uvp,vvp) \
do { \
(vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
(vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
if ((vvp)->tv_usec >= 1000000) { \
(vvp)->tv_sec++; \
(vvp)->tv_usec -= 1000000; \
} \
} while (/* CONSTCOND */ 0)
#endif
#ifndef timersub
#define timersub(tvp,uvp,vvp) \
do { \
(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
if ((vvp)->tv_usec < 0) { \
(vvp)->tv_sec--; \
(vvp)->tv_usec += 1000000; \
} \
} while (/* CONSTCOND */ 0)
#endif
#ifndef timercmp
#define timercmp(tvp,uvp,cmp) (((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_usec cmp (uvp)->tv_usec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
#endif
/* if this breaks, see sh.h,v 1.954 commit message and diff */
#ifndef _POSIX_VDISABLE
/* Linux klibc lacks this definition */
#define _POSIX_VDISABLE 0xFFU /* unsigned (for cc_t) default (BSD) value */
#endif
#define KSH_ISVDIS(x,d) ((x) == _POSIX_VDISABLE ? (d) : KBI(x))
#define KSH_DOVDIS(x) (x) = _POSIX_VDISABLE
#ifndef S_ISFIFO
#define S_ISFIFO(m) ((m & 0170000) == 0010000)
#endif
#ifndef S_ISCHR
#define S_ISCHR(m) ((m & 0170000) == 0020000)
#endif
#ifndef S_ISLNK
#define S_ISLNK(m) ((m & 0170000) == 0120000)
#endif
#ifndef S_ISSOCK
#define S_ISSOCK(m) ((m & 0170000) == 0140000)
#endif
#if !defined(S_ISCDF) && defined(S_CDF)
#define S_ISCDF(m) (S_ISDIR(m) && ((m) & S_CDF))
#endif
#ifndef DEFFILEMODE
#define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
#endif
/* determine ksh_NSIG: first, use the traditional definitions */
#undef ksh_NSIG
#if defined(NSIG)
#define ksh_NSIG (NSIG)
#elif defined(_NSIG)
#define ksh_NSIG (_NSIG)
#elif defined(SIGMAX)
#define ksh_NSIG (SIGMAX + 1)
#elif defined(_SIGMAX)
#define ksh_NSIG (_SIGMAX + 1)
#elif defined(NSIG_MAX)
#define ksh_NSIG (NSIG_MAX)
#elif defined(MKSH_FOR_Z_OS)
#define ksh_NSIG 40
#else
# error Please have your platform define NSIG.
#endif
/* range-check them */
#if (ksh_NSIG < 1)
# error Your NSIG value is not positive.
#undef ksh_NSIG
#endif
/* second, see if the new POSIX definition is available */
#ifdef NSIG_MAX
#if (NSIG_MAX < 2)
/* and usable */
# error Your NSIG_MAX value is too small.
#undef NSIG_MAX
#elif (ksh_NSIG > NSIG_MAX)
/* and realistic */
# error Your NSIG value is larger than your NSIG_MAX value.
#undef NSIG_MAX
#else
/* since it’s usable, prefer it */
#undef ksh_NSIG
#define ksh_NSIG (NSIG_MAX)
#endif
/* if NSIG_MAX is now still defined, use sysconf(_SC_NSIG) at runtime */
#endif
/* third, for cpp without the error directive, default */
#ifndef ksh_NSIG
#define ksh_NSIG 64
#endif
#define ksh_sigmask(sig) (((sig) < 1 || (sig) > 127) ? 255 : 128 + (sig))
#if HAVE_SIGACTION
typedef struct sigaction ksh_sigsaved;
#define ksh_sighandler(saved) (saved.sa_handler)
void ksh_sigrestore(int, ksh_sigsaved *);
#else
typedef sig_t ksh_sigsaved;
#define ksh_sighandler(saved) (saved)
#define ksh_sigrestore(s,svp) ksh_sigset((s), *(svp), NULL)
#endif
#if HAVE_SIGDESCR_NP
#define ksh_sigmess(nr) sigdescr_np(nr)
#elif HAVE_SYS_SIGLIST
#if !HAVE_SYS_SIGLIST_DECL
extern const char * const sys_siglist[];
#endif
#define ksh_sigmess(nr) sys_siglist[nr]
#elif HAVE_STRSIGNAL
#define ksh_sigmess(nr) strsignal(nr)
#else
#define ksh_sigmess(nr) NULL
#endif
#define ksh_sigmessf(mess) (!(mess) || !*(mess))
/* contract: masks the signal, may restart, not oneshot */
void ksh_sigset(int, sig_t, ksh_sigsaved *);
/* OS-dependent additions (functions, variables, by OS) */
#ifdef MKSH_EXE_EXT
#undef MKSH_EXE_EXT
#define MKSH_EXE_EXT ".exe"
#else
#define MKSH_EXE_EXT ""
#endif
#ifdef __OS2__
#define MKSH_UNIXROOT "/@unixroot"
#else
#define MKSH_UNIXROOT ""
#endif
#ifdef MKSH_DOSPATH
#ifndef __GNUC__
# error GCC extensions needed later on
#endif
#define MKSH_PATHSEPS ";"
#define MKSH_PATHSEPC ';'
#else
#define MKSH_PATHSEPS ":"
#define MKSH_PATHSEPC ':'
#endif
#if !HAVE_FLOCK_DECL
extern int flock(int, int);
#endif
#if !HAVE_GETTIMEOFDAY
#define mksh_TIME(tv) do { \
(tv).tv_usec = 0; \
(tv).tv_sec = time(NULL); \
} while (/* CONSTCOND */ 0)
#else
#define mksh_TIME(tv) gettimeofday(&(tv), NULL)
#endif
#if !HAVE_MEMMOVE
#undef memmove
#define memmove rpl_memmove
void *rpl_memmove(void *, const void *, size_t);
#endif
#if !HAVE_REVOKE_DECL
extern int revoke(const char *);
#endif
#ifndef EOVERFLOW
#define EOVERFLOW ERANGE
#endif
#if defined(DEBUG) || !HAVE_STRERROR
#undef strerror
#define strerror /* poisoned */ dontuse_strerror
extern const char *cstrerror(int);
#else
#define cstrerror(errnum) ((const char *)strerror(errnum))
#endif
#if !HAVE_STRLCPY
size_t strlcpy(char *, const char *, size_t);
#endif
#ifdef __INTERIX
/* XXX imake style */
#define makedev mkdev
extern int __cdecl seteuid(uid_t);
extern int __cdecl setegid(gid_t);
#endif
#if defined(__COHERENT__)
#ifndef O_ACCMODE
/* this need not work everywhere, take care */
#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
#endif
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
#undef O_MAYEXEC /* https://lwn.net/Articles/820658/ */
#define O_MAYEXEC 0
#ifdef MKSH__NO_SYMLINK
#undef S_ISLNK
#define S_ISLNK(m) (/* CONSTCOND */ 0)
#define mksh_lstat stat
#else
#define mksh_lstat lstat
#endif
#if HAVE_TERMIOS_H
#define mksh_ttyst struct termios
#define mksh_tcget(fd,st) tcgetattr((fd), (st))
#define mksh_tcset(fd,st) tcsetattr((fd), TCSADRAIN, (st))
#else
#define mksh_ttyst struct termio
#define mksh_tcget(fd,st) ioctl((fd), TCGETA, (st))
#define mksh_tcset(fd,st) ioctl((fd), TCSETAW, (st))
#endif
#ifndef ISTRIP
#define ISTRIP 0
#endif
#ifdef MKSH_EBCDIC
#define KSH_BEL '\a'
#define KSH_ESC 047
#define KSH_ESC_STRING "\047"
#define KSH_VTAB '\v'
#else
/*
* According to the comments in pdksh, \007 seems to be more portable
* than \a (HP-UX cc, Ultrix cc, old pcc, etc.) so we avoid the escape
* sequence if ASCII can be assumed.
*/
#define KSH_BEL 7
#define KSH_ESC 033
#define KSH_ESC_STRING "\033"
#define KSH_VTAB 11
#endif
/* some useful #defines */
#ifdef EXTERN
# define E_INIT(i) = i
#else
# define E_INIT(i)
# define EXTERN extern
# define EXTERN_DEFINED
#endif
/* define bit in flag */
#define BIT(i) (1U << (i))
/* check bit(s) */
#define HAS(v,f) (((v) & (f)) == (f))
#define IS(v,f,t) (((v) & (f)) == (t))
/* array sizing */
#undef NELEM
#define NELEM(a) (sizeof(a) / sizeof((a)[0]))
/*
* Make MAGIC a char that might be printed to make bugs more obvious, but
* not a char that is used often. Also, can't use the high bit as it causes
* portability problems (calling strchr(x, 0x80 | 'x') is error prone).
*
* MAGIC can be followed by MAGIC (to escape the octet itself) or one of:
* ' !)*,-?[]{|}' 0x80|' !*+?@' (probably… hysteric raisins abound)
*
* The |0x80 is likely unsafe on EBCDIC :( though the listed chars are
* low-bit7 at least on cp1047 so YMMV
*/
#define MAGIC KSH_BEL /* prefix for *?[!{,} during expand */
#define ISMAGIC(c) (ord(c) == ORD(MAGIC))
EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */
#ifdef MKSH_LEGACY_MODE
#define KSH_VERSIONNAME_ISLEGACY "LEGACY"
#else
#define KSH_VERSIONNAME_ISLEGACY "MIRBSD"
#endif
#ifdef DEBUG
#define KSH_VERSIONNAME_DEBUG " +DEBUG_dont_ship_to_users"
#else
#define KSH_VERSIONNAME_DEBUG ""
#endif
#ifdef MKSH_WITH_TEXTMODE
#define KSH_VERSIONNAME_TEXTMODE " +TEXTMODE"
#else
#define KSH_VERSIONNAME_TEXTMODE ""
#endif
#ifdef MKSH_EBCDIC
#define KSH_VERSIONNAME_EBCDIC " +EBCDIC"
#else
#define KSH_VERSIONNAME_EBCDIC ""
#endif
#ifndef KSH_VERSIONNAME_VENDOR_EXT
#define KSH_VERSIONNAME_VENDOR_EXT ""
#endif
EXTERN const char initvsn[] E_INIT("KSH_VERSION=@(#)" KSH_VERSIONNAME_ISLEGACY \
" KSH " MKSH_VERSION KSH_VERSIONNAME_DEBUG \
KSH_VERSIONNAME_EBCDIC KSH_VERSIONNAME_TEXTMODE \
KSH_VERSIONNAME_VENDOR_EXT);
#define KSH_VERSION (initvsn + /* "KSH_VERSION=@(#)" */ 16)
EXTERN const char digits_uc[] E_INIT("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
EXTERN const char digits_lc[] E_INIT("0123456789abcdefghijklmnopqrstuvwxyz");
/*
* Evil hack for const correctness due to API brokenness
*/
union mksh_cchack {
char *rw;
const char *ro;
};
union mksh_ccphack {
char **rw;
const char **ro;
};
/* for const debugging */
#if defined(DEBUG)
char *ucstrchr(char *, int);
const char *cstrchr(const char *, int);
#undef strchr
#define strchr poisoned_strchr
#else
#define ucstrchr(s,c) strchr((s), (c))
#define cstrchr(s,c) ((const char *)strchr((s), (c)))
#endif
#define vstrchr(s,c) (cstrchr((s), (c)) != NULL)
#if defined(DEBUG) || !HAVE_STRSTR
char *ucstrstr(char *, const char *);
const char *cstrstr(const char *, const char *);
#define strstr poisoned_strstr
#else
#define ucstrstr(s,c) strstr((s), (c))
#define cstrstr(s,c) ((const char *)strstr((s), (c)))
#endif
#define vstrstr(b,l) (cstrstr((b), (l)) != NULL)
#if defined(DEBUG) || defined(__COVERITY__)
#ifndef DEBUG_LEAKS
#define DEBUG_LEAKS
#endif
#endif
#if (!defined(MKSH_BUILDMAKEFILE4BSD) && !defined(MKSH_BUILDSH)) || (MKSH_BUILD_R != 599)
#error Use the documented way to build this.
extern void thiswillneverbedefinedIhope(void);
int
im_sorry_dave(void)
{
/* I’m sorry, Dave. I’m afraid I can’t do that. */
return (thiswillneverbedefinedIhope());
}
#endif
/* use this ipv strchr(s, 0) but no side effects in s! */
#define strnul(s) ((s) + strlen((const void *)s))
/* inspired by jupp, where they are in lowercase though */
#define SC(s) (s), (sizeof(s) / sizeof(s[0]) - 1U)
#define SZ(s) (s), strlen(s)
#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
#define strdupx(d,s,ap) do { \
(d) = strdup_i((s), (ap)); \
} while (/* CONSTCOND */ 0)
#define strndupx(d,s,n,ap) do { \
(d) = strndup_i((s), (n), (ap)); \
} while (/* CONSTCOND */ 0)
#else
/* be careful to evaluate arguments only once! */
#define strdupx(d,s,ap) do { \
const char *strdup_src = (const void *)(s); \
char *strdup_dst = NULL; \
\
if (strdup_src != NULL) { \
size_t strdup_len = strlen(strdup_src) + 1U; \
strdup_dst = alloc(strdup_len, (ap)); \
memcpy(strdup_dst, strdup_src, strdup_len); \
} \
(d) = strdup_dst; \
} while (/* CONSTCOND */ 0)
#define strndupx(d,s,n,ap) do { \
const char *strdup_src = (const void *)(s); \
char *strdup_dst = NULL; \
\
if (strdup_src != NULL) { \
size_t strndup_len = (n); \
strdup_dst = alloc(strndup_len + 1U, (ap)); \
memcpy(strdup_dst, strdup_src, strndup_len); \
strdup_dst[strndup_len] = '\0'; \
} \
(d) = strdup_dst; \
} while (/* CONSTCOND */ 0)
#endif
#define strnbdupx(d,s,n,ap,b) do { \
const char *strdup_src = (const void *)(s); \
char *strdup_dst = NULL; \
\
if (strdup_src != NULL) { \
size_t strndup_len = (n); \
strdup_dst = strndup_len < sizeof(b) ? (b) : \
alloc(strndup_len + 1U, (ap)); \
memcpy(strdup_dst, strdup_src, strndup_len); \
strdup_dst[strndup_len] = '\0'; \
} \
(d) = strdup_dst; \
} while (/* CONSTCOND */ 0)
#define strdup2x(d,s1,s2) do { \
const char *strdup_src = (const void *)(s1); \
const char *strdup_app = (const void *)(s2); \
size_t strndup_len = strlen(strdup_src); \
size_t strndup_ln2 = strlen(strdup_app) + 1U; \
char *strdup_dst = alloc1(strndup_len, strndup_ln2, ATEMP); \
\
memcpy(strdup_dst, strdup_src, strndup_len); \
memcpy(strdup_dst + strndup_len, strdup_app, strndup_ln2); \
(d) = strdup_dst; \
} while (/* CONSTCOND */ 0)
#define strpathx(d,s1,s2,cond) do { \
const char *strdup_src = (const void *)(s1); \
const char *strdup_app = (const void *)(s2); \
size_t strndup_len = strlen(strdup_src) + 1U; \
size_t strndup_ln2 = ((cond) || *strdup_app) ? \
strlen(strdup_app) + 1U : 0; \
char *strdup_dst = alloc1(strndup_len, strndup_ln2, ATEMP); \
\
memcpy(strdup_dst, strdup_src, strndup_len); \
if (strndup_ln2) { \
strdup_dst[strndup_len - 1U] = '/'; \
memcpy(strdup_dst + strndup_len, strdup_app, \
strndup_ln2); \
} \
(d) = strdup_dst; \
} while (/* CONSTCOND */ 0)
#define memstr(d,s) memcpy((d), (s), sizeof(s))
#ifdef MKSH_SMALL
#ifndef MKSH_NOPWNAM
#define MKSH_NOPWNAM /* defined */
#endif
#ifndef MKSH_S_NOVI
#define MKSH_S_NOVI 1
#endif
#endif
#ifndef MKSH_S_NOVI
#define MKSH_S_NOVI 0
#endif
#if defined(MKSH_NOPROSPECTOFWORK) && !defined(MKSH_UNEMPLOYED)
#define MKSH_UNEMPLOYED 1
#endif
/* savedfd data type */
typedef kby ksh_fdsave;
/* savedfd “index is closed” mask */
#define FDICLMASK ((ksh_fdsave)0x80U)
/* savedfd “fd number” mask */
#define FDNUMMASK ((ksh_fdsave)0x7FU)
/* savedfd fd numbers are ≥ FDBASE */
/* savedfd “not saved” number: 0 */
/* savedfd “saved is closed” or savefd error indicator number */
#define FDCLOSED ((ksh_fdsave)0x01U)
/* savefd() to savedfd mapper */
#define FDSAVE(i,sfd) do { \
int FDSAVEsavedfd = (sfd); \
e->savedfd[i] = FDSAVEsavedfd < FDBASE ? FDCLOSED : \
/* ≤ FDMAXNUM checked in savefd() already */ \
(ksh_fdsave)(FDSAVEsavedfd & FDNUMMASK); \
} while (/* CONSTCOND */ 0)
/* savedfd to restfd mapper */
#define FDSVNUM(ep,i) ((kui)((ep)->savedfd[i] & FDNUMMASK))
#define SAVEDFD(ep,i) (FDSVNUM(ep, i) == (kui)FDCLOSED ? \
-1 : (int)FDSVNUM(ep, i))
/* first fd number usable by the shell for its own purposes */
#define FDBASE 10
/* … and last one */
#define FDMAXNUM 127 /* 0x7FU, cf. FDNUMMASK */
/* number of user-accessible file descriptors */
#define NUFILE 10
/*
* simple grouping allocator
*/
/* 0. OS API: where to get memory from and how to free it (grouped) */
/* malloc(3)/realloc(3) -> free(3) for use by the memory allocator */
#define malloc_osi(sz) malloc(sz)
#define realloc_osi(p,sz) realloc((p), (sz))
#define free_osimalloc(p) free(p)
/* malloc(3)/realloc(3) -> free(3) for use by mksh code */
#define malloc_osfunc(sz) malloc(sz)
#define realloc_osfunc(p,sz) realloc((p), (sz))
#define free_osfunc(p) free(p)
#if HAVE_MKNOD
/* setmode(3) -> free(3) */
#define free_ossetmode(p) free(p)
#endif
#if HAVE_GET_CURRENT_DIR_NAME
/* GNU libc: get_current_dir_name(3) -> free(3) */
#define free_gnu_gcdn(p) free(p)
#endif
/* 1. internal structure */
struct lalloc_common {
struct lalloc_common *next;
};
#ifdef MKSH_ALLOC_CATCH_UNDERRUNS
struct lalloc_item {
struct lalloc_common *next;
size_t len;
char dummy[8192 - sizeof(struct lalloc_common *) - sizeof(size_t)];
};
#endif
/* 2. sizes */
#ifdef MKSH_ALLOC_CATCH_UNDERRUNS
#define ALLOC_ITEM struct lalloc_item
#define ALLOC_OVERHEAD 0
#else
#define ALLOC_ITEM struct lalloc_common
#define ALLOC_OVERHEAD (sizeof(ALLOC_ITEM))
#endif
/* 3. group structure */
typedef struct lalloc_common Area;
EXTERN Area aperm; /* permanent object space */
#define APERM &aperm
#define ATEMP &e->area
/*
* flags (the order of these enums MUST match the order in misc.c(options[]))
*/
enum sh_flag {
#define SHFLAGS_ENUMS
#include "sh_flags.gen"
FNFLAGS /* (place holder: how many flags are there) */
};
#define Flag(f) (shell_flags[(int)(f)])
#define UTFMODE Flag(FUNNYCODE)
/*
* parsing & execution environment
*
* note that kshlongjmp MUST NOT be passed 0 as second argument!
*
* kshsetjmp() is to *not* save (and kshlongjmp() to not restore) signals!
*/
#ifdef MKSH_NO_SIGSETJMP
#define kshjmp_buf jmp_buf
#define kshsetjmp(jbuf) _setjmp(jbuf)
#define kshlongjmp _longjmp
#else
#define kshjmp_buf sigjmp_buf
#define kshsetjmp(jbuf) sigsetjmp((jbuf), 0)
#define kshlongjmp siglongjmp
#endif
struct sretrace_info;
struct yyrecursive_state;
EXTERN struct sretrace_info *retrace_info;
EXTERN unsigned int subshell_nesting_type;
extern struct env {
ALLOC_ITEM alloc_INT; /* internal, do not touch */
Area area; /* temporary allocation area */
struct env *oenv; /* link to previous environment */
struct block *loc; /* local variables and functions */
ksh_fdsave *savedfd; /* original fds for redirected fds */
struct temp *temps; /* temp files */
/* saved parser recursion state */
struct yyrecursive_state *yyrecursive_statep;
kshjmp_buf jbuf; /* long jump back to env creator */
kby type; /* environment type - see below */
kby flags; /* EF_* */