mksh/sh.h

1920 lines
58 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* $OpenBSD: sh.h,v 1.30 2010/01/04 18:07:11 deraadt Exp $ */
/* $OpenBSD: shf.h,v 1.6 2005/12/11 18:53:51 deraadt Exp $ */
/* $OpenBSD: table.h,v 1.7 2005/12/11 20:31:21 otto Exp $ */
/* $OpenBSD: tree.h,v 1.10 2005/03/28 21:28:22 deraadt Exp $ */
/* $OpenBSD: expand.h,v 1.6 2005/03/30 17:16:37 deraadt Exp $ */
/* $OpenBSD: lex.h,v 1.11 2006/05/29 18:22:24 otto Exp $ */
/* $OpenBSD: proto.h,v 1.33 2010/05/19 17:36:08 jasper 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 © 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
* Thorsten Glaser <tg@mirbsd.org>
*
* 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 persons immediate fault when using the work as intended.
*/
#ifdef __dietlibc__
/* XXX imake style */
#define _BSD_SOURCE /* live, BSD, live❣ */
#endif
#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <sys/types.h>
#include <sys/time.h>
#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
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#if HAVE_LIBGEN_H
#include <libgen.h>
#endif
#if HAVE_LIBUTIL_H
#include <libutil.h>
#endif
#include <limits.h>
#if HAVE_PATHS_H
#include <paths.h>
#endif
#include <pwd.h>
#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
#include <termios.h>
#include <time.h>
#if HAVE_ULIMIT_H
#include <ulimit.h>
#endif
#include <unistd.h>
#if HAVE_VALUES_H
#include <values.h>
#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_NONNULL
#define MKSH_A_NONNULL(a) __attribute__(a)
#else
#define MKSH_A_NONNULL(a) /* 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 */
#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
#ifdef EXTERN
__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.513 2011/12/29 22:54:21 tg Exp $");
#endif
#define MKSH_VERSION "R40 2011/12/16"
/* arithmetics types */
typedef int32_t mksh_ari_t;
typedef uint32_t mksh_uari_t;
/* boolean type (no <stdbool.h> deliberately) */
typedef unsigned char mksh_bool;
#undef bool
/* false MUST equal 0 */
#undef false
#undef true
/* access macros for boolean type */
#define bool mksh_bool
/* values must have identity mapping between mksh_bool and short */
#define false 0
#define true 1
/* make any-type into bool or short */
#define tobool(cond) ((cond) ? true : false)
#ifndef MKSH_INCLUDES_ONLY
/* extra types */
#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;
};
#endif
#if !HAVE_RLIM_T
typedef long rlim_t;
#endif
#if !HAVE_SIG_T
#undef sig_t
typedef void (*sig_t)(int);
#endif
#if !HAVE_CAN_INTTYPES
#if !HAVE_CAN_UCBINTS
typedef signed int int32_t;
typedef unsigned int uint32_t;
#else
typedef u_int32_t uint32_t;
#endif
#endif
#if !HAVE_CAN_INT8TYPE
#if !HAVE_CAN_UCBINT8
typedef unsigned char uint8_t;
#else
typedef u_int8_t uint8_t;
#endif
#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
#define ksh_isdigit(c) (((c) >= '0') && ((c) <= '9'))
#define ksh_islower(c) (((c) >= 'a') && ((c) <= 'z'))
#define ksh_isupper(c) (((c) >= 'A') && ((c) <= 'Z'))
#define ksh_tolower(c) (((c) >= 'A') && ((c) <= 'Z') ? (c) - 'A' + 'a' : (c))
#define ksh_toupper(c) (((c) >= 'a') && ((c) <= 'z') ? (c) - 'a' + 'A' : (c))
#define ksh_isdash(s) (((s) != NULL) && ((s)[0] == '-') && ((s)[1] == '\0'))
#define ksh_isspace(c) ((((c) >= 0x09) && ((c) <= 0x0D)) || ((c) == 0x20))
#ifdef NO_PATH_MAX
#undef PATH_MAX
#else
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
#endif
#ifndef SIZE_MAX
#ifdef SIZE_T_MAX
#define SIZE_MAX SIZE_T_MAX
#else
#define SIZE_MAX ((size_t)-1)
#endif
#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
#ifndef NSIG
#if defined(_NSIG)
#define NSIG _NSIG
#elif defined(SIGMAX)
#define NSIG (SIGMAX+1)
#endif
#endif
#undef BAD /* AIX defines that somewhere */
/* OS-dependent additions (functions, variables, by OS) */
#if !HAVE_FLOCK_DECL
extern int flock(int, int);
#endif
#if !HAVE_GETRUSAGE
extern int getrusage(int, struct rusage *);
#endif
#if !HAVE_REVOKE_DECL
extern int revoke(const char *);
#endif
#ifdef __ultrix
/* XXX imake style */
int strcasecmp(const char *, const char *);
#endif
#if !HAVE_STRCASESTR
const char *stristr(const char *, const char *);
#endif
#if !HAVE_STRLCPY
size_t strlcpy(char *, const char *, size_t);
#endif
#if !HAVE_SYS_SIGLIST_DECL
extern const char *const sys_siglist[];
#endif
#ifdef __INTERIX
/* XXX imake style */
#define makedev mkdev
extern int __cdecl seteuid(uid_t);
extern int __cdecl setegid(gid_t);
#endif
/* remove redundances */
#if defined(MirBSD) && (MirBSD >= 0x08A8)
#define MKSH_mirbsd_wcwidth
#define utf_wcwidth(i) wcwidth((__WCHAR_TYPE__)i)
extern int wcwidth(__WCHAR_TYPE__);
#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) (1 << (i))
#define NELEM(a) (sizeof(a) / sizeof((a)[0]))
/* these shall be smaller than 100 */
#ifdef MKSH_CONSERVATIVE_FDS
#define NUFILE 32 /* Number of user-accessible files */
#define FDBASE 10 /* First file usable by Shell */
#else
#define NUFILE 56 /* Number of user-accessible files */
#define FDBASE 24 /* First file usable by Shell */
#endif
/*
* 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).
*/
#define MAGIC (7) /* prefix for *?[!{,} during expand */
#define ISMAGIC(c) ((unsigned char)(c) == MAGIC)
#define NOT '!' /* might use ^ (ie, [!...] vs [^..]) */
#define LINE 4096 /* input line size */
EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */
EXTERN const char initvsn[] E_INIT("KSH_VERSION=@(#)MIRBSD KSH " MKSH_VERSION);
#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) && defined(__GNUC__) && !defined(__ICC) && \
!defined(__INTEL_COMPILER) && !defined(__SUNPRO_C)
char *ucstrchr(char *, int);
char *ucstrstr(char *, const char *);
#undef strchr
#define strchr ucstrchr
#define strstr ucstrstr
#define cstrchr(s,c) ({ \
union mksh_cchack in, out; \
\
in.ro = (s); \
out.rw = ucstrchr(in.rw, (c)); \
(out.ro); \
})
#define cstrstr(b,l) ({ \
union mksh_cchack in, out; \
\
in.ro = (b); \
out.rw = ucstrstr(in.rw, (l)); \
(out.ro); \
})
#define vstrchr(s,c) (cstrchr((s), (c)) != NULL)
#define vstrstr(b,l) (cstrstr((b), (l)) != NULL)
#define mkssert(e) ((e) ? (void)0 : exit(255))
#else /* !DEBUG, !gcc */
#define cstrchr(s,c) ((const char *)strchr((s), (c)))
#define cstrstr(s,c) ((const char *)strstr((s), (c)))
#define vstrchr(s,c) (strchr((s), (c)) != NULL)
#define vstrstr(b,l) (strstr((b), (l)) != NULL)
#define mkssert(e) ((void)0)
#endif
/* use this ipv strchr(s, 0) but no side effects in s! */
#define strnul(s) ((s) + strlen(s))
#define utf_ptradjx(src, dst) do { \
(dst) = (src) + utf_ptradj(src); \
} while (/* CONSTCOND */ 0)
#ifdef MKSH_SMALL
#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 = (s); \
char *strdup_dst = NULL; \
\
if (strdup_src != NULL) { \
size_t strdup_len = strlen(strdup_src) + 1; \
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 = (s); \
char *strdup_dst = NULL; \
\
if (strdup_src != NULL) { \
size_t strndup_len = (n); \
strdup_dst = alloc(strndup_len + 1, (ap)); \
memcpy(strdup_dst, strdup_src, strndup_len); \
strdup_dst[strndup_len] = '\0'; \
} \
(d) = strdup_dst; \
} while (/* CONSTCOND */ 0)
#endif
#if HAVE_STRCASESTR
#define stristr(b,l) ((const char *)strcasestr((b), (l)))
#endif
#ifdef MKSH_SMALL
#ifndef MKSH_CONSERVATIVE_FDS
#define MKSH_CONSERVATIVE_FDS /* defined */
#endif
#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
/*
* 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_MKSTEMP
/* tempnam(3) -> free(3) */
#define free_ostempnam(p) free(p)
#endif
#ifdef NO_PATH_MAX
/* GNU libc: get_current_dir_name(3) -> free(3) */
#define free_gnu_gcdn(p) free(p)
#endif
/* 1. internal structure */
struct lalloc {
struct lalloc *next;
};
/* 2. sizes */
#define ALLOC_ITEM struct lalloc
#define ALLOC_SIZE (sizeof(ALLOC_ITEM))
/* 3. group structure (only the same for lalloc.c) */
typedef struct lalloc 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.h"
FNFLAGS /* (place holder: how many flags are there) */
};
#define Flag(f) (shell_flags[(int)(f)])
#define UTFMODE Flag(FUNICODE)
/*
* parsing & execution environment
*/
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 */
short *savefd; /* original redirected fds */
struct temp *temps; /* temp files */
sigjmp_buf jbuf; /* long jump back to env creator */
short type; /* environment type - see below */
short flags; /* EF_* */
} *e;
/* struct env.type values */
#define E_NONE 0 /* dummy environment */
#define E_PARSE 1 /* parsing command # */
#define E_FUNC 2 /* executing function # */
#define E_INCL 3 /* including a file via . # */
#define E_EXEC 4 /* executing command tree */
#define E_LOOP 5 /* executing for/while # */
#define E_ERRH 6 /* general error handler # */
/* # indicates env has valid jbuf (see unwind()) */
/* struct env.flag values */
#define EF_FUNC_PARSE BIT(0) /* function being parsed */
#define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */
#define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */
/* Do breaks/continues stop at env type e? */
#define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE \
|| (t) == E_FUNC || (t) == E_INCL)
/* Do returns stop at env type e? */
#define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL)
/* values for siglongjmp(e->jbuf, 0) */
#define LRETURN 1 /* return statement */
#define LEXIT 2 /* exit statement */
#define LERROR 3 /* errorf() called */
#define LLEAVE 4 /* untrappable exit/error */
#define LINTR 5 /* ^C noticed */
#define LBREAK 6 /* break statement */
#define LCONTIN 7 /* continue statement */
#define LSHELL 8 /* return to interactive shell() */
#define LAEXPR 9 /* error in arithmetic expression */
/* sort of shell global state */
EXTERN pid_t procpid; /* PID of executing process */
EXTERN int exstat; /* exit status */
EXTERN int subst_exstat; /* exit status of last $(..)/`..` */
EXTERN struct tbl *vp_pipest; /* global PIPESTATUS array */
EXTERN short trap_exstat; /* exit status before running a trap */
EXTERN uint8_t trap_nested; /* running nested traps */
EXTERN uint8_t shell_flags[FNFLAGS];
EXTERN const char *kshname; /* $0 */
EXTERN struct {
uid_t kshuid_v; /* real UID of shell */
uid_t ksheuid_v; /* effective UID of shell */
gid_t kshgid_v; /* real GID of shell */
gid_t kshegid_v; /* effective GID of shell */
pid_t kshpgrp_v; /* process group of shell */
pid_t kshppid_v; /* PID of parent of shell */
pid_t kshpid_v; /* $$, shell PID */
} rndsetupstate;
#define kshpid rndsetupstate.kshpid_v
#define kshpgrp rndsetupstate.kshpgrp_v
#define kshuid rndsetupstate.kshuid_v
#define ksheuid rndsetupstate.ksheuid_v
#define kshgid rndsetupstate.kshgid_v
#define kshegid rndsetupstate.kshegid_v
#define kshppid rndsetupstate.kshppid_v
/* option processing */
#define OF_CMDLINE 0x01 /* command line */
#define OF_SET 0x02 /* set builtin */
#define OF_SPECIAL 0x04 /* a special variable changing */
#define OF_INTERNAL 0x08 /* set internally by shell */
#define OF_FIRSTTIME 0x10 /* as early as possible, once */
#define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL)
struct shoption {
const char *name; /* long name of option */
char c; /* character flag (if any) */
unsigned char flags; /* OF_* */
};
extern const struct shoption options[];
/* null value for variable; comparison pointer for unset */
EXTERN char null[] E_INIT("");
/* helpers for string pooling */
EXTERN const char Tintovfl[] E_INIT("integer overflow %zu %c %zu prevented");
EXTERN const char Toomem[] E_INIT("can't allocate %lu data bytes");
#if defined(__GNUC__)
/* trust this to have string pooling; -Wformat bitches otherwise */
#define Tsynerr "syntax error"
#else
EXTERN const char Tsynerr[] E_INIT("syntax error");
#endif
EXTERN const char Tselect[] E_INIT("select");
EXTERN const char Tr_fc_e_dash[] E_INIT("r=fc -e -");
#define Tfc_e_dash (Tr_fc_e_dash + 2) /* "fc -e -" */
#define Zfc_e_dash 7 /* strlen(Tfc_e_dash) */
EXTERN const char Tlocal_typeset[] E_INIT("local=typeset");
#define T_typeset (Tlocal_typeset + 5) /* "=typeset" */
#define Ttypeset (Tlocal_typeset + 6) /* "typeset" */
EXTERN const char Tpalias[] E_INIT("+alias");
#define Talias (Tpalias + 1) /* "alias" */
EXTERN const char Tpunalias[] E_INIT("+unalias");
#define Tunalias (Tpunalias + 1) /* "unalias" */
EXTERN const char Tsgset[] E_INIT("*=set");
#define Tset (Tsgset + 2) /* "set" */
EXTERN const char Tgbuiltin[] E_INIT("=builtin");
#define Tbuiltin (Tgbuiltin + 1) /* "builtin" */
EXTERN const char T_function[] E_INIT(" function");
#define Tfunction (T_function + 1) /* "function" */
enum temp_type {
TT_HEREDOC_EXP, /* expanded heredoc */
TT_HIST_EDIT /* temp file used for history editing (fc -e) */
};
typedef enum temp_type Temp_type;
/* temp/heredoc files. The file is removed when the struct is freed. */
struct temp {
struct temp *next;
struct shf *shf;
char *name;
int pid; /* pid of process parsed here-doc */
Temp_type type;
};
/*
* stdio and our IO routines
*/
#define shl_spare (&shf_iob[0]) /* for c_read()/c_print() */
#define shl_stdout (&shf_iob[1])
#define shl_out (&shf_iob[2])
EXTERN bool shl_stdout_ok;
/*
* trap handlers
*/
typedef struct trap {
const char *name; /* short name */
const char *mess; /* descriptive name */
char *trap; /* trap command */
sig_t cursig; /* current handler (valid if TF_ORIG_* set) */
sig_t shtrap; /* shell signal handler */
int signal; /* signal number */
int flags; /* TF_* */
volatile sig_atomic_t set; /* trap pending */
} Trap;
/* values for Trap.flags */
#define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */
#define TF_USER_SET BIT(1) /* user has (tried to) set trap */
#define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */
#define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */
#define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */
#define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */
#define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */
#define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */
#define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */
#define TF_FATAL BIT(9) /* causes termination if not trapped */
/* values for setsig()/setexecsig() flags argument */
#define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */
#define SS_RESTORE_CURR 0 /* leave current handler in place */
#define SS_RESTORE_ORIG 1 /* restore original handler */
#define SS_RESTORE_DFL 2 /* restore to SIG_DFL */
#define SS_RESTORE_IGN 3 /* restore to SIG_IGN */
#define SS_FORCE BIT(3) /* set signal even if original signal ignored */
#define SS_USER BIT(4) /* user is doing the set (ie, trap command) */
#define SS_SHTRAP BIT(5) /* trap for internal use (ALRM, CHLD, WINCH) */
#define ksh_SIGEXIT 0 /* for trap EXIT */
#define ksh_SIGERR NSIG /* for trap ERR */
EXTERN volatile sig_atomic_t trap; /* traps pending? */
EXTERN volatile sig_atomic_t intrsig; /* pending trap interrupts command */
EXTERN volatile sig_atomic_t fatal_trap; /* received a fatal signal */
extern Trap sigtraps[NSIG+1];
/* got_winch = 1 when we need to re-adjust the window size */
#ifdef SIGWINCH
EXTERN volatile sig_atomic_t got_winch E_INIT(1);
#else
#define got_winch true
#endif
/*
* TMOUT support
*/
/* values for ksh_tmout_state */
enum tmout_enum {
TMOUT_EXECUTING = 0, /* executing commands */
TMOUT_READING, /* waiting for input */
TMOUT_LEAVING /* have timed out */
};
EXTERN unsigned int ksh_tmout;
EXTERN enum tmout_enum ksh_tmout_state E_INIT(TMOUT_EXECUTING);
/* For "You have stopped jobs" message */
EXTERN int really_exit;
/*
* fast character classes
*/
#define C_ALPHA BIT(0) /* a-z_A-Z */
#define C_DIGIT BIT(1) /* 0-9 */
#define C_LEX1 BIT(2) /* \t \n\0|&;<>() */
#define C_VAR1 BIT(3) /* *@#!$-? */
#define C_IFSWS BIT(4) /* \t \n (IFS white space) */
#define C_SUBOP1 BIT(5) /* "=-+?" */
#define C_QUOTE BIT(6) /* \t\n "#$&'()*;<=>?[\]`| (needing quoting) */
#define C_IFS BIT(7) /* $IFS */
#define C_SUBOP2 BIT(8) /* "#%" (magic, see below) */
extern unsigned char chtypes[];
#define ctype(c, t) tobool( ((t) == C_SUBOP2) ? \
(((c) == '#' || (c) == '%') ? 1 : 0) : \
(chtypes[(unsigned char)(c)] & (t)) )
#define ksh_isalphx(c) ctype((c), C_ALPHA)
#define ksh_isalnux(c) ctype((c), C_ALPHA | C_DIGIT)
EXTERN int ifs0 E_INIT(' '); /* for "$*" */
/* Argument parsing for built-in commands and getopts command */
/* Values for Getopt.flags */
#define GF_ERROR BIT(0) /* call errorf() if there is an error */
#define GF_PLUSOPT BIT(1) /* allow +c as an option */
#define GF_NONAME BIT(2) /* don't print argv[0] in errors */
/* Values for Getopt.info */
#define GI_MINUS BIT(0) /* an option started with -... */
#define GI_PLUS BIT(1) /* an option started with +... */
#define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */
/* in case some OS defines these */
#undef optarg
#undef optind
typedef struct {
const char *optarg;
int optind;
int uoptind; /* what user sees in $OPTIND */
int flags; /* see GF_* */
int info; /* see GI_* */
unsigned int p; /* 0 or index into argv[optind - 1] */
char buf[2]; /* for bad option OPTARG value */
} Getopt;
EXTERN Getopt builtin_opt; /* for shell builtin commands */
EXTERN Getopt user_opt; /* parsing state for getopts builtin command */
/* This for co-processes */
/* something that won't (realisticly) wrap */
typedef int32_t Coproc_id;
struct coproc {
void *job; /* 0 or job of co-process using input pipe */
int read; /* pipe from co-process's stdout */
int readw; /* other side of read (saved temporarily) */
int write; /* pipe to co-process's stdin */
int njobs; /* number of live jobs using output pipe */
Coproc_id id; /* id of current output pipe */
};
EXTERN struct coproc coproc;
#ifndef MKSH_NOPROSPECTOFWORK
/* used in jobs.c and by coprocess stuff in exec.c and select() calls */
EXTERN sigset_t sm_default, sm_sigchld;
#endif
/* name of called builtin function (used by error functions) */
EXTERN const char *builtin_argv0;
/* flags of called builtin (SPEC_BI, etc.) */
EXTERN uint32_t builtin_flag;
/* current working directory */
EXTERN char *current_wd;
/*
* Minimum required space to work with on a line - if the prompt leaves
* less space than this on a line, the prompt is truncated.
*/
#define MIN_EDIT_SPACE 7
/*
* Minimum allowed value for x_cols: 2 for prompt, 3 for " < " at end of line
*/
#define MIN_COLS (2 + MIN_EDIT_SPACE + 3)
#define MIN_LINS 3
EXTERN mksh_ari_t x_cols E_INIT(80); /* tty columns */
EXTERN mksh_ari_t x_lins E_INIT(-1); /* tty lines */
/* These to avoid bracket matching problems */
#define OPAREN '('
#define CPAREN ')'
#define OBRACK '['
#define CBRACK ']'
#define OBRACE '{'
#define CBRACE '}'
/* Determine the location of the system (common) profile */
/* This is deliberately not configurable via CPPFLAGS */
#if defined(ANDROID)
#define MKSH_ETC_LOCATION "/system/etc"
#else
#define MKSH_ETC_LOCATION "/etc"
#endif
#define MKSH_SYSTEM_PROFILE MKSH_ETC_LOCATION "/profile"
#define MKSH_SUID_PROFILE MKSH_ETC_LOCATION "/suid_profile"
/* Used by v_evaluate() and setstr() to control action when error occurs */
#define KSH_UNWIND_ERROR 0 /* unwind the stack (longjmp) */
#define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */
/*
* Shell file I/O routines
*/
#define SHF_BSIZE 512
#define shf_fileno(shf) ((shf)->fd)
#define shf_setfileno(shf,nfd) ((shf)->fd = (nfd))
#define shf_getc_i(shf) ((shf)->rnleft > 0 ? \
(shf)->rnleft--, *(shf)->rp++ : \
shf_getchar(shf))
#define shf_putc_i(c, shf) ((shf)->wnleft == 0 ? \
shf_putchar((c), (shf)) : \
((shf)->wnleft--, *(shf)->wp++ = (c)))
#define shf_eof(shf) ((shf)->flags & SHF_EOF)
#define shf_error(shf) ((shf)->flags & SHF_ERROR)
#define shf_errno(shf) ((shf)->errnosv)
#define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR))
/* Flags passed to shf_*open() */
#define SHF_RD 0x0001
#define SHF_WR 0x0002
#define SHF_RDWR (SHF_RD|SHF_WR)
#define SHF_ACCMODE 0x0003 /* mask */
#define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */
#define SHF_UNBUF 0x0008 /* unbuffered I/O */
#define SHF_CLEXEC 0x0010 /* set close on exec flag */
#define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig)
* (shf_open() only) */
#define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */
#define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */
/* Flags used internally */
#define SHF_STRING 0x0100 /* a string, not a file */
#define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */
#define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */
#define SHF_ERROR 0x0800 /* read()/write() error */
#define SHF_EOF 0x1000 /* read eof (sticky) */
#define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */
#define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */
struct shf {
Area *areap; /* area shf/buf were allocated in */
unsigned char *rp; /* read: current position in buffer */
unsigned char *wp; /* write: current position in buffer */
unsigned char *buf; /* buffer */
ssize_t bsize; /* actual size of buf */
ssize_t rbsize; /* size of buffer (1 if SHF_UNBUF) */
ssize_t rnleft; /* read: how much data left in buffer */
ssize_t wbsize; /* size of buffer (0 if SHF_UNBUF) */
ssize_t wnleft; /* write: how much space left in buffer */
int flags; /* see SHF_* */
int fd; /* file descriptor */
int errnosv; /* saved value of errno after error */
};
extern struct shf shf_iob[];
struct table {
Area *areap; /* area to allocate entries */
struct tbl **tbls; /* hashed table items */
size_t nfree; /* free table entries */
uint8_t tshift; /* table size (2^tshift) */
};
/* table item */
struct tbl {
/* Area to allocate from */
Area *areap;
/* value */
union {
char *s; /* string */
mksh_ari_t i; /* integer */
mksh_uari_t u; /* unsigned integer */
int (*f)(const char **); /* built-in command */
struct op *t; /* "function" tree */
} val;
union {
struct tbl *array; /* array values */
const char *fpath; /* temporary path to undef function */
} u;
union {
int field; /* field with for -L/-R/-Z */
int errnov; /* CEXEC/CTALIAS */
} u2;
union {
uint32_t hval; /* hash(name) */
uint32_t index; /* index for an array */
} ua;
/*
* command type (see below), base (if INTEGER),
* offset from val.s of value (if EXPORT)
*/
int type;
/* flags (see below) */
uint32_t flag;
/* actually longer: name (variable length) */
char name[4];
};
/* common flag bits */
#define ALLOC BIT(0) /* val.s has been allocated */
#define DEFINED BIT(1) /* is defined in block */
#define ISSET BIT(2) /* has value, vp->val.[si] */
#define EXPORT BIT(3) /* exported variable/function */
#define TRACE BIT(4) /* var: user flagged, func: execution tracing */
/* (start non-common flags at 8) */
/* flag bits used for variables */
#define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */
#define INTEGER BIT(9) /* val.i contains integer value */
#define RDONLY BIT(10) /* read-only variable */
#define LOCAL BIT(11) /* for local typeset() */
#define ARRAY BIT(13) /* array */
#define LJUST BIT(14) /* left justify */
#define RJUST BIT(15) /* right justify */
#define ZEROFIL BIT(16) /* 0 filled if RJUSTIFY, strip 0s if LJUSTIFY */
#define LCASEV BIT(17) /* convert to lower case */
#define UCASEV_AL BIT(18) /* convert to upper case / autoload function */
#define INT_U BIT(19) /* unsigned integer */
#define INT_L BIT(20) /* long integer (no-op but used as magic) */
#define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */
#define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */
#define EXPRINEVAL BIT(23) /* contents currently being evaluated */
#define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */
#define AINDEX BIT(25) /* array index >0 = ua.index filled in */
#define ASSOC BIT(26) /* ARRAY ? associative : reference */
/* flag bits used for taliases/builtins/aliases/keywords/functions */
#define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */
#define FINUSE BIT(9) /* function being executed */
#define FDELETE BIT(10) /* function deleted while it was executing */
#define FKSH BIT(11) /* function defined with function x (vs x()) */
#define SPEC_BI BIT(12) /* a POSIX special builtin */
#define REG_BI BIT(13) /* a POSIX regular builtin */
/*
* Attributes that can be set by the user (used to decide if an unset
* param should be repoted by set/typeset). Does not include ARRAY or
* LOCAL.
*/
#define USERATTRIB (EXPORT|INTEGER|RDONLY|LJUST|RJUST|ZEROFIL|\
LCASEV|UCASEV_AL|INT_U|INT_L)
#define arrayindex(vp) ((unsigned long)((vp)->flag & AINDEX ? \
(vp)->ua.index : 0))
EXTERN enum {
SRF_NOP,
SRF_ENABLE,
SRF_DISABLE
} set_refflag E_INIT(SRF_NOP);
/* command types */
#define CNONE 0 /* undefined */
#define CSHELL 1 /* built-in */
#define CFUNC 2 /* function */
#define CEXEC 4 /* executable command */
#define CALIAS 5 /* alias */
#define CKEYWD 6 /* keyword */
#define CTALIAS 7 /* tracked alias */
/* Flags for findcom()/comexec() */
#define FC_SPECBI BIT(0) /* special builtin */
#define FC_FUNC BIT(1) /* function builtin */
#define FC_REGBI BIT(2) /* regular builtin */
#define FC_UNREGBI BIT(3) /* un-regular builtin (!special,!regular) */
#define FC_BI (FC_SPECBI|FC_REGBI|FC_UNREGBI)
#define FC_PATH BIT(4) /* do path search */
#define FC_DEFPATH BIT(5) /* use default path in path search */
#define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */
#define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */
#define AI_ARGV(a, i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip])
#define AI_ARGC(a) ((a).ai_argc - (a).skip)
/* Argument info. Used for $#, $* for shell, functions, includes, etc. */
struct arg_info {
const char **argv;
int flags; /* AF_* */
int ai_argc;
int skip; /* first arg is argv[0], second is argv[1 + skip] */
};
/*
* activation record for function blocks
*/
struct block {
Area area; /* area to allocate things */
const char **argv;
char *error; /* error handler */
char *exit; /* exit handler */
struct block *next; /* enclosing block */
struct table vars; /* local variables */
struct table funs; /* local functions */
Getopt getopts_state;
int argc;
int flags; /* see BF_* */
};
/* Values for struct block.flags */
#define BF_DOGETOPTS BIT(0) /* save/restore getopts state */
/*
* Used by ktwalk() and ktnext() routines.
*/
struct tstate {
struct tbl **next;
ssize_t left;
};
EXTERN struct table taliases; /* tracked aliases */
EXTERN struct table builtins; /* built-in commands */
EXTERN struct table aliases; /* aliases */
EXTERN struct table keywords; /* keywords */
#ifndef MKSH_NOPWNAM
EXTERN struct table homedirs; /* homedir() cache */
#endif
struct builtin {
const char *name;
int (*func)(const char **);
};
extern const struct builtin mkshbuiltins[];
/* values for set_prompt() */
#define PS1 0 /* command */
#define PS2 1 /* command continuation */
EXTERN char *path; /* copy of either PATH or def_path */
EXTERN const char *def_path; /* path to use if PATH not set */
EXTERN char *tmpdir; /* TMPDIR value */
EXTERN const char *prompt;
EXTERN int cur_prompt; /* PS1 or PS2 */
EXTERN int current_lineno; /* LINENO value */
#define NOBLOCK ((struct op *)NULL)
#define NOWORD ((char *)NULL)
#define NOWORDS ((char **)NULL)
/*
* Description of a command or an operation on commands.
*/
struct op {
const char **args; /* arguments to a command */
char **vars; /* variable assignments */
struct ioword **ioact; /* IO actions (eg, < > >>) */
struct op *left, *right; /* descendents */
char *str; /* word for case; identifier for for,
* select, and functions;
* path to execute for TEXEC;
* time hook for TCOM.
*/
int lineno; /* TCOM/TFUNC: LINENO for this */
short type; /* operation type, see below */
/* WARNING: newtp(), tcopy() use evalflags = 0 to clear union */
union {
/* TCOM: arg expansion eval() flags */
short evalflags;
/* TFUNC: function x (vs x()) */
short ksh_func;
/* TPAT: termination character */
char charflag;
} u;
};
/* Tree.type values */
#define TEOF 0
#define TCOM 1 /* command */
#define TPAREN 2 /* (c-list) */
#define TPIPE 3 /* a | b */
#define TLIST 4 /* a ; b */
#define TOR 5 /* || */
#define TAND 6 /* && */
#define TBANG 7 /* ! */
#define TDBRACKET 8 /* [[ .. ]] */
#define TFOR 9
#define TSELECT 10
#define TCASE 11
#define TIF 12
#define TWHILE 13
#define TUNTIL 14
#define TELIF 15
#define TPAT 16 /* pattern in case */
#define TBRACE 17 /* {c-list} */
#define TASYNC 18 /* c & */
#define TFUNCT 19 /* function name { command; } */
#define TTIME 20 /* time pipeline */
#define TEXEC 21 /* fork/exec eval'd TCOM */
#define TCOPROC 22 /* coprocess |& */
/*
* prefix codes for words in command tree
*/
#define EOS 0 /* end of string */
#define CHAR 1 /* unquoted character */
#define QCHAR 2 /* quoted character */
#define COMSUB 3 /* $() substitution (0 terminated) */
#define EXPRSUB 4 /* $(()) substitution (0 terminated) */
#define OQUOTE 5 /* opening " or ' */
#define CQUOTE 6 /* closing " or ' */
#define OSUBST 7 /* opening ${ subst (followed by { or X) */
#define CSUBST 8 /* closing } of above (followed by } or X) */
#define OPAT 9 /* open pattern: *(, @(, etc. */
#define SPAT 10 /* separate pattern: | */
#define CPAT 11 /* close pattern: ) */
#define ADELIM 12 /* arbitrary delimiter: ${foo:2:3} ${foo/bar/baz} */
/*
* IO redirection
*/
struct ioword {
int unit; /* unit affected */
int flag; /* action (below) */
char *name; /* file name (unused if heredoc) */
char *delim; /* delimiter for <<,<<- */
char *heredoc; /* content of heredoc */
};
/* ioword.flag - type of redirection */
#define IOTYPE 0xF /* type: bits 0:3 */
#define IOREAD 0x1 /* < */
#define IOWRITE 0x2 /* > */
#define IORDWR 0x3 /* <>: todo */
#define IOHERE 0x4 /* << (here file) */
#define IOCAT 0x5 /* >> */
#define IODUP 0x6 /* <&/>& */
#define IOEVAL BIT(4) /* expand in << */
#define IOSKIP BIT(5) /* <<-, skip ^\t* */
#define IOCLOB BIT(6) /* >|, override -o noclobber */
#define IORDUP BIT(7) /* x<&y (as opposed to x>&y) */
#define IONAMEXP BIT(8) /* name has been expanded */
#define IOBASH BIT(9) /* &> etc. */
#define IOHERESTR BIT(10) /* <<< (here string) */
#define IONDELIM BIT(11) /* null delimiter (<<) */
/* execute/exchild flags */
#define XEXEC BIT(0) /* execute without forking */
#define XFORK BIT(1) /* fork before executing */
#define XBGND BIT(2) /* command & */
#define XPIPEI BIT(3) /* input is pipe */
#define XPIPEO BIT(4) /* output is pipe */
#define XPIPE (XPIPEI|XPIPEO) /* member of pipe */
#define XXCOM BIT(5) /* `...` command */
#define XPCLOSE BIT(6) /* exchild: close close_fd in parent */
#define XCCLOSE BIT(7) /* exchild: close close_fd in child */
#define XERROK BIT(8) /* non-zero exit ok (for set -e) */
#define XCOPROC BIT(9) /* starting a co-process */
#define XTIME BIT(10) /* timing TCOM command */
#define XPIPEST BIT(11) /* want PIPESTATUS */
/*
* flags to control expansion of words (assumed by t->evalflags to fit
* in a short)
*/
#define DOBLANK BIT(0) /* perform blank interpretation */
#define DOGLOB BIT(1) /* expand [?* */
#define DOPAT BIT(2) /* quote *?[ */
#define DOTILDE BIT(3) /* normal ~ expansion (first char) */
#define DONTRUNCOMMAND BIT(4) /* do not run $(command) things */
#define DOASNTILDE BIT(5) /* assignment ~ expansion (after =, :) */
#define DOBRACE BIT(6) /* used by expand(): do brace expansion */
#define DOMAGIC BIT(7) /* used by expand(): string contains MAGIC */
#define DOTEMP BIT(8) /* dito: in word part of ${..[%#=?]..} */
#define DOVACHECK BIT(9) /* var assign check (for typeset, set, etc) */
#define DOMARKDIRS BIT(10) /* force markdirs behaviour */
/*
* The arguments of [[ .. ]] expressions are kept in t->args[] and flags
* indicating how the arguments have been munged are kept in t->vars[].
* The contents of t->vars[] are stuffed strings (so they can be treated
* like all other t->vars[]) in which the second character is the one that
* is examined. The DB_* defines are the values for these second characters.
*/
#define DB_NORM 1 /* normal argument */
#define DB_OR 2 /* || -> -o conversion */
#define DB_AND 3 /* && -> -a conversion */
#define DB_BE 4 /* an inserted -BE */
#define DB_PAT 5 /* a pattern argument */
#define X_EXTRA 20 /* this many extra bytes in X string */
typedef struct XString {
char *end, *beg; /* end, begin of string */
size_t len; /* length */
Area *areap; /* area to allocate/free from */
} XString;
typedef char *XStringP;
/* initialise expandable string */
#define XinitN(xs, length, area) do { \
(xs).len = (length); \
(xs).areap = (area); \
(xs).beg = alloc((xs).len + X_EXTRA, (xs).areap); \
(xs).end = (xs).beg + (xs).len; \
} while (/* CONSTCOND */ 0)
#define Xinit(xs, xp, length, area) do { \
XinitN((xs), (length), (area)); \
(xp) = (xs).beg; \
} while (/* CONSTCOND */ 0)
/* stuff char into string */
#define Xput(xs, xp, c) (*xp++ = (c))
/* check if there are at least n bytes left */
#define XcheckN(xs, xp, n) do { \
ssize_t more = ((xp) + (n)) - (xs).end; \
if (more > 0) \
(xp) = Xcheck_grow(&(xs), (xp), more); \
} while (/* CONSTCOND */ 0)
/* check for overflow, expand string */
#define Xcheck(xs, xp) XcheckN((xs), (xp), 1)
/* free string */
#define Xfree(xs, xp) afree((xs).beg, (xs).areap)
/* close, return string */
#define Xclose(xs, xp) aresize((xs).beg, (xp) - (xs).beg, (xs).areap)
/* begin of string */
#define Xstring(xs, xp) ((xs).beg)
#define Xnleft(xs, xp) ((xs).end - (xp)) /* may be less than 0 */
#define Xlength(xs, xp) ((xp) - (xs).beg)
#define Xsize(xs, xp) ((xs).end - (xs).beg)
#define Xsavepos(xs, xp) ((xp) - (xs).beg)
#define Xrestpos(xs, xp, n) ((xs).beg + (n))
char *Xcheck_grow(XString *, const char *, size_t);
/*
* expandable vector of generic pointers
*/
typedef struct XPtrV {
void **cur; /* next avail pointer */
void **beg, **end; /* begin, end of vector */
} XPtrV;
#define XPinit(x, n) do { \
void **XPinit_vp; \
XPinit_vp = alloc2((n), sizeof(void *), ATEMP); \
(x).cur = (x).beg = XPinit_vp; \
(x).end = XPinit_vp + (n); \
} while (/* CONSTCOND */ 0)
#define XPput(x, p) do { \
if ((x).cur >= (x).end) { \
size_t n = XPsize(x); \
(x).beg = aresize2((x).beg, \
n, 2 * sizeof(void *), ATEMP); \
(x).cur = (x).beg + n; \
(x).end = (x).cur + n; \
} \
*(x).cur++ = (p); \
} while (/* CONSTCOND */ 0)
#define XPptrv(x) ((x).beg)
#define XPsize(x) ((x).cur - (x).beg)
#define XPclose(x) aresize2((x).beg, XPsize(x), sizeof(void *), ATEMP)
#define XPfree(x) afree((x).beg, ATEMP)
#define IDENT 64
typedef struct source Source;
struct source {
const char *str; /* input pointer */
const char *start; /* start of current buffer */
union {
const char **strv; /* string [] */
struct shf *shf; /* shell file */
struct tbl *tblp; /* alias (SF_HASALIAS) */
char *freeme; /* also for SREREAD */
} u;
const char *file; /* input file name */
int type; /* input type */
int line; /* line number */
int errline; /* line the error occurred on (0 if not set) */
int flags; /* SF_* */
Area *areap;
Source *next; /* stacked source */
XString xs; /* input buffer */
char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and
* alias (SALIAS) */
};
/* Source.type values */
#define SEOF 0 /* input EOF */
#define SFILE 1 /* file input */
#define SSTDIN 2 /* read stdin */
#define SSTRING 3 /* string */
#define SWSTR 4 /* string without \n */
#define SWORDS 5 /* string[] */
#define SWORDSEP 6 /* string[] separator */
#define SALIAS 7 /* alias expansion */
#define SREREAD 8 /* read ahead to be re-scanned */
/* Source.flags values */
#define SF_ECHO BIT(0) /* echo input to shlout */
#define SF_ALIAS BIT(1) /* faking space at end of alias */
#define SF_ALIASEND BIT(2) /* faking space at end of alias */
#define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
#define SF_HASALIAS BIT(4) /* u.tblp valid (SALIAS, SEOF) */
typedef union {
int i;
char *cp;
char **wp;
struct op *o;
struct ioword *iop;
} YYSTYPE;
/* If something is added here, add it to tokentab[] in syn.c as well */
#define LWORD 256
#define LOGAND 257 /* && */
#define LOGOR 258 /* || */
#define BREAK 259 /* ;; */
#define IF 260
#define THEN 261
#define ELSE 262
#define ELIF 263
#define FI 264
#define CASE 265
#define ESAC 266
#define FOR 267
#define SELECT 268
#define WHILE 269
#define UNTIL 270
#define DO 271
#define DONE 272
#define IN 273
#define FUNCTION 274
#define TIME 275
#define REDIR 276
#define MDPAREN 277 /* (( )) */
#define BANG 278 /* ! */
#define DBRACKET 279 /* [[ .. ]] */
#define COPROC 280 /* |& */
#define BRKEV 281 /* ;| */
#define BRKFT 282 /* ;& */
#define YYERRCODE 300
/* flags to yylex */
#define CONTIN BIT(0) /* skip new lines to complete command */
#define ONEWORD BIT(1) /* single word for substitute() */
#define ALIAS BIT(2) /* recognise alias */
#define KEYWORD BIT(3) /* recognise keywords */
#define LETEXPR BIT(4) /* get expression inside (( )) */
#define VARASN BIT(5) /* check for var=word */
#define ARRAYVAR BIT(6) /* parse x[1 & 2] as one word */
#define ESACONLY BIT(7) /* only accept esac keyword */
#define CMDWORD BIT(8) /* parsing simple command (alias related) */
#define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
#define LQCHAR BIT(10) /* source string contains QCHAR */
#define HEREDOC BIT(11) /* parsing a here document */
#define HERES 10 /* max number of << in line */
#undef CTRL
#define CTRL(x) ((x) == '?' ? 0x7F : (x) & 0x1F) /* ASCII */
#define UNCTRL(x) ((x) ^ 0x40) /* ASCII */
EXTERN Source *source; /* yyparse/yylex source */
EXTERN YYSTYPE yylval; /* result from yylex */
EXTERN struct ioword *heres[HERES], **herep;
EXTERN char ident[IDENT+1];
#define HISTORYSIZE 500 /* size of saved history */
EXTERN char **history; /* saved commands */
EXTERN char **histptr; /* last history item */
EXTERN int histsize; /* history size */
/* user and system time of last j_waitjed job */
EXTERN struct timeval j_usrtime, j_systime;
#define notoktomul(fac1, fac2) (((fac1) != 0) && ((fac2) != 0) && \
((SIZE_MAX / (fac1)) < (fac2)))
#define notoktoadd(val, cnst) ((val) > (SIZE_MAX - (cnst)))
#define checkoktoadd(val, cnst) do { \
if (notoktoadd((val), (cnst))) \
internal_errorf(Tintovfl, (size_t)(val), \
'+', (size_t)(cnst)); \
} while (/* CONSTCOND */ 0)
/* NZAT/NZAAT hashes based on Bob Jenkins' one-at-a-time hash */
/* From: src/kern/include/nzat.h,v 1.2 2011/07/18 00:35:40 tg Exp $ */
#define NZATInit(h) do { \
(h) = 0; \
} while (/* CONSTCOND */ 0)
#define NZATUpdateByte(h,b) do { \
(h) += (uint8_t)(b); \
++(h); \
(h) += (h) << 10; \
(h) ^= (h) >> 6; \
} while (/* CONSTCOND */ 0)
#define NZATUpdateMem(h,p,z) do { \
register const uint8_t *NZATUpdateMem_p; \
register size_t NZATUpdateMem_z = (z); \
\
NZATUpdateMem_p = (const void *)(p); \
while (NZATUpdateMem_z--) \
NZATUpdateByte((h), *NZATUpdateMem_p++); \
} while (/* CONSTCOND */ 0)
#define NZATUpdateString(h,s) do { \
register const char *NZATUpdateString_s; \
register uint8_t NZATUpdateString_c; \
\
NZATUpdateString_s = (const void *)(s); \
while ((NZATUpdateString_c = *NZATUpdateString_s++)) \
NZATUpdateByte((h), NZATUpdateString_c); \
} while (/* CONSTCOND */ 0)
/* not zero after termination */
#define NZATFinish(h) do { \
if ((h) == 0) \
++(h); \
else \
NZAATFinish(h); \
} while (/* CONSTCOND */ 0)
/* NULs zählen an allen Teilen */
#define NZAATFinish(h) do { \
(h) += (h) << 10; \
(h) ^= (h) >> 6; \
(h) += (h) << 3; \
(h) ^= (h) >> 11; \
(h) += (h) << 15; \
} while (/* CONSTCOND */ 0)
/* lalloc.c */
void ainit(Area *);
void afreeall(Area *);
/* these cannot fail and can take NULL (not for ap) */
#define alloc(n, ap) aresize(NULL, (n), (ap))
#define alloc2(m, n, ap) aresize2(NULL, (m), (n), (ap))
void *aresize(void *, size_t, Area *);
void *aresize2(void *, size_t, size_t, Area *);
void afree(void *, Area *); /* can take NULL */
/* edit.c */
#ifndef MKSH_SMALL
int x_bind(const char *, const char *, bool, bool);
#else
int x_bind(const char *, const char *, bool);
#endif
void x_init(void);
void x_mkraw(int, struct termios *, bool);
int x_read(char *, size_t);
/* eval.c */
char *substitute(const char *, int);
char **eval(const char **, int);
char *evalstr(const char *cp, int);
char *evalonestr(const char *cp, int);
char *debunk(char *, const char *, size_t);
void expand(const char *, XPtrV *, int);
int glob_str(char *, XPtrV *, int);
/* exec.c */
int execute(struct op * volatile, volatile int, volatile int * volatile);
int shcomexec(const char **);
struct tbl *findfunc(const char *, uint32_t, bool);
int define(const char *, struct op *);
const char *builtin(const char *, int (*)(const char **));
struct tbl *findcom(const char *, int);
void flushcom(bool);
const char *search_path(const char *, const char *, int, int *);
int pr_menu(const char * const *);
int pr_list(char * const *);
/* expr.c */
int evaluate(const char *, mksh_ari_t *, int, bool);
int v_evaluate(struct tbl *, const char *, volatile int, bool);
/* UTF-8 stuff */
size_t utf_mbtowc(unsigned int *, const char *);
size_t utf_wctomb(char *, unsigned int);
int utf_widthadj(const char *, const char **);
size_t utf_mbswidth(const char *);
const char *utf_skipcols(const char *, int);
size_t utf_ptradj(const char *);
#ifndef MKSH_mirbsd_wcwidth
int utf_wcwidth(unsigned int);
#endif
int ksh_access(const char *, int);
/* funcs.c */
int c_hash(const char **);
int c_pwd(const char **);
int c_print(const char **);
#ifdef MKSH_PRINTF_BUILTIN
int c_printf(const char **);
#endif
int c_whence(const char **);
int c_command(const char **);
int c_typeset(const char **);
int c_alias(const char **);
int c_unalias(const char **);
int c_let(const char **);
int c_jobs(const char **);
#ifndef MKSH_UNEMPLOYED
int c_fgbg(const char **);
#endif
int c_kill(const char **);
void getopts_reset(int);
int c_getopts(const char **);
int c_bind(const char **);
int c_shift(const char **);
int c_umask(const char **);
int c_dot(const char **);
int c_wait(const char **);
int c_read(const char **);
int c_eval(const char **);
int c_trap(const char **);
int c_brkcont(const char **);
int c_exitreturn(const char **);
int c_set(const char **);
int c_unset(const char **);
int c_ulimit(const char **);
int c_times(const char **);
int timex(struct op *, int, volatile int *);
void timex_hook(struct op *, char ** volatile *);
int c_exec(const char **);
/* dummy function (just need pointer value), special case in comexec() */
#define c_builtin shcomexec
int c_test(const char **);
#if HAVE_MKNOD
int c_mknod(const char **);
#endif
int c_realpath(const char **);
int c_rename(const char **);
int c_cat(const char **);
int c_sleep(const char **);
/* histrap.c */
void init_histvec(void);
void hist_init(Source *);
#if HAVE_PERSISTENT_HISTORY
void hist_finish(void);
#endif
void histsave(int *, const char *, bool, bool);
#if !defined(MKSH_SMALL) && HAVE_PERSISTENT_HISTORY
bool histsync(void);
#endif
int c_fc(const char **);
void sethistsize(int);
#if HAVE_PERSISTENT_HISTORY
void sethistfile(const char *);
#endif
char **histpos(void);
int histnum(int);
int findhist(int, int, const char *, int);
char **hist_get_newest(bool);
void inittraps(void);
void alarm_init(void);
Trap *gettrap(const char *, int);
void trapsig(int);
void intrcheck(void);
int fatal_trap_check(void);
int trap_pending(void);
void runtraps(int intr);
void runtrap(Trap *, bool);
void cleartraps(void);
void restoresigs(void);
void settrap(Trap *, const char *);
int block_pipe(void);
void restore_pipe(int);
int setsig(Trap *, sig_t, int);
void setexecsig(Trap *, int);
/* jobs.c */
void j_init(void);
void j_exit(void);
#ifndef MKSH_UNEMPLOYED
void j_change(void);
#endif
int exchild(struct op *, int, volatile int *, int);
void startlast(void);
int waitlast(void);
int waitfor(const char *, int *);
int j_kill(const char *, int);
#ifndef MKSH_UNEMPLOYED
int j_resume(const char *, int);
#endif
int j_jobs(const char *, int, int);
void j_notify(void);
pid_t j_async(void);
int j_stopped_running(void);
/* lex.c */
int yylex(int);
void yyerror(const char *, ...)
MKSH_A_NORETURN
MKSH_A_FORMAT(__printf__, 1, 2);
Source *pushs(int, Area *);
void set_prompt(int, Source *);
void pprompt(const char *, int);
int promptlen(const char *);
/* main.c */
int include(const char *, int, const char **, int);
int command(const char *, int);
int shell(Source *volatile, int volatile);
void unwind(int) MKSH_A_NORETURN;
void newenv(int);
void quitenv(struct shf *);
void cleanup_parents_env(void);
void cleanup_proc_env(void);
void errorf(const char *, ...)
MKSH_A_NORETURN
MKSH_A_FORMAT(__printf__, 1, 2);
void errorfx(int, const char *, ...)
MKSH_A_NORETURN
MKSH_A_FORMAT(__printf__, 2, 3);
void warningf(bool, const char *, ...)
MKSH_A_FORMAT(__printf__, 2, 3);
void bi_errorf(const char *, ...)
MKSH_A_FORMAT(__printf__, 1, 2);
#define errorfz() errorf("\1")
#define errorfxz(rc) errorfx((rc), "\1")
#define bi_errorfz() bi_errorf("\1")
void internal_errorf(const char *, ...)
MKSH_A_NORETURN
MKSH_A_FORMAT(__printf__, 1, 2);
void internal_warningf(const char *, ...)
MKSH_A_FORMAT(__printf__, 1, 2);
void error_prefix(bool);
void shellf(const char *, ...)
MKSH_A_FORMAT(__printf__, 1, 2);
void shprintf(const char *, ...)
MKSH_A_FORMAT(__printf__, 1, 2);
int can_seek(int);
void initio(void);
int ksh_dup2(int, int, bool);
short savefd(int);
void restfd(int, int);
void openpipe(int *);
void closepipe(int *);
int check_fd(const char *, int, const char **);
void coproc_init(void);
void coproc_read_close(int);
void coproc_readw_close(int);
void coproc_write_close(int);
int coproc_getfd(int, const char **);
void coproc_cleanup(int);
struct temp *maketemp(Area *, Temp_type, struct temp **);
void ktinit(Area *, struct table *, uint8_t);
struct tbl *ktscan(struct table *, const char *, uint32_t, struct tbl ***);
/* table, name (key) to search for, hash(n) */
#define ktsearch(tp, s, h) ktscan((tp), (s), (h), NULL)
struct tbl *ktenter(struct table *, const char *, uint32_t);
#define ktdelete(p) do { p->flag = 0; } while (/* CONSTCOND */ 0)
void ktwalk(struct tstate *, struct table *);
struct tbl *ktnext(struct tstate *);
struct tbl **ktsort(struct table *);
/* misc.c */
void setctypes(const char *, int);
void initctypes(void);
size_t option(const char *);
char *getoptions(void);
void change_flag(enum sh_flag, int, unsigned int);
int parse_args(const char **, int, bool *);
int getn(const char *, int *);
int bi_getn(const char *, int *);
int gmatchx(const char *, const char *, bool);
int has_globbing(const char *, const char *);
int xstrcmp(const void *, const void *);
void ksh_getopt_reset(Getopt *, int);
int ksh_getopt(const char **, Getopt *, const char *);
void print_value_quoted(struct shf *, const char *);
char *quote_value(const char *);
void print_columns(struct shf *, int,
char *(*)(char *, size_t, int, const void *),
const void *, size_t, size_t, bool);
void strip_nuls(char *, int);
ssize_t blocking_read(int, char *, size_t)
MKSH_A_BOUNDED(__buffer__, 2, 3);
int reset_nonblock(int);
char *ksh_get_wd(void);
char *do_realpath(const char *);
void simplify_path(char *);
void set_current_wd(const char *);
int c_cd(const char **);
#ifdef MKSH_SMALL
char *strdup_i(const char *, Area *);
char *strndup_i(const char *, size_t, Area *);
#endif
int unbksl(bool, int (*)(void), void (*)(int));
/* shf.c */
struct shf *shf_open(const char *, int, int, int);
struct shf *shf_fdopen(int, int, struct shf *);
struct shf *shf_reopen(int, int, struct shf *);
struct shf *shf_sopen(char *, ssize_t, int, struct shf *);
int shf_close(struct shf *);
int shf_fdclose(struct shf *);
char *shf_sclose(struct shf *);
int shf_flush(struct shf *);
ssize_t shf_read(char *, ssize_t, struct shf *);
char *shf_getse(char *, ssize_t, struct shf *);
int shf_getchar(struct shf *s);
int shf_ungetc(int, struct shf *);
#ifdef MKSH_SMALL
int shf_getc(struct shf *);
int shf_putc(int, struct shf *);
#else
#define shf_getc shf_getc_i
#define shf_putc shf_putc_i
#endif
int shf_putchar(int, struct shf *);
ssize_t shf_puts(const char *, struct shf *);
ssize_t shf_write(const char *, ssize_t, struct shf *);
ssize_t shf_fprintf(struct shf *, const char *, ...)
MKSH_A_FORMAT(__printf__, 2, 3);
ssize_t shf_snprintf(char *, ssize_t, const char *, ...)
MKSH_A_FORMAT(__printf__, 3, 4)
MKSH_A_BOUNDED(__string__, 1, 2);
char *shf_smprintf(const char *, ...)
MKSH_A_FORMAT(__printf__, 1, 2);
ssize_t shf_vfprintf(struct shf *, const char *, va_list)
MKSH_A_FORMAT(__printf__, 2, 0);
/* syn.c */
void initkeywords(void);
struct op *compile(Source *, bool);
bool parse_usec(const char *, struct timeval *);
char *yyrecursive(void);
/* tree.c */
void fptreef(struct shf *, int, const char *, ...);
char *snptreef(char *, ssize_t, const char *, ...);
struct op *tcopy(struct op *, Area *);
char *wdcopy(const char *, Area *);
const char *wdscan(const char *, int);
#define WDS_TPUTS BIT(0) /* tputS (dumpwdvar) mode */
#define WDS_KEEPQ BIT(1) /* keep quote characters */
#define WDS_MAGIC BIT(2) /* make MAGIC */
char *wdstrip(const char *, int);
void tfree(struct op *, Area *);
void dumpchar(struct shf *, int);
void dumptree(struct shf *, struct op *);
void dumpwdvar(struct shf *, const char *);
void dumpioact(struct shf *shf, struct op *t);
void vistree(char *, size_t, struct op *)
MKSH_A_BOUNDED(__string__, 1, 2);
void fpFUNCTf(struct shf *, int, bool, const char *, struct op *);
/* var.c */
void newblock(void);
void popblock(void);
void initvar(void);
struct tbl *global(const char *);
struct tbl *local(const char *, bool);
char *str_val(struct tbl *);
int setstr(struct tbl *, const char *, int);
struct tbl *setint_v(struct tbl *, struct tbl *, bool);
void setint(struct tbl *, mksh_ari_t);
void setint_n(struct tbl *, mksh_ari_t, int);
struct tbl *typeset(const char *, uint32_t, uint32_t, int, int)
MKSH_A_NONNULL((__nonnull__ (1)));
void unset(struct tbl *, int);
const char *skip_varname(const char *, int);
const char *skip_wdvarname(const char *, bool);
int is_wdvarname(const char *, bool);
int is_wdvarassign(const char *);
struct tbl *arraysearch(struct tbl *, uint32_t);
char **makenv(void);
void change_winsz(void);
size_t array_ref_len(const char *);
char *arrayname(const char *);
mksh_uari_t set_array(const char *, bool, const char **);
uint32_t hash(const void *);
void rndset(long);
enum Test_op {
/* non-operator */
TO_NONOP = 0,
/* unary operators */
TO_STNZE, TO_STZER, TO_OPTION,
TO_FILAXST,
TO_FILEXST,
TO_FILREG, TO_FILBDEV, TO_FILCDEV, TO_FILSYM, TO_FILFIFO, TO_FILSOCK,
TO_FILCDF, TO_FILID, TO_FILGID, TO_FILSETG, TO_FILSTCK, TO_FILUID,
TO_FILRD, TO_FILGZ, TO_FILTT, TO_FILSETU, TO_FILWR, TO_FILEX,
/* binary operators */
TO_STEQL, TO_STNEQ, TO_STLT, TO_STGT, TO_INTEQ, TO_INTNE, TO_INTGT,
TO_INTGE, TO_INTLT, TO_INTLE, TO_FILEQ, TO_FILNT, TO_FILOT,
/* not an operator */
TO_NONNULL /* !TO_NONOP */
};
typedef enum Test_op Test_op;
/* Used by Test_env.isa() (order important - used to index *_tokens[] arrays) */
enum Test_meta {
TM_OR, /* -o or || */
TM_AND, /* -a or && */
TM_NOT, /* ! */
TM_OPAREN, /* ( */
TM_CPAREN, /* ) */
TM_UNOP, /* unary operator */
TM_BINOP, /* binary operator */
TM_END /* end of input */
};
typedef enum Test_meta Test_meta;
#define TEF_ERROR BIT(0) /* set if we've hit an error */
#define TEF_DBRACKET BIT(1) /* set if [[ .. ]] test */
typedef struct test_env {
union {
const char **wp; /* used by ptest_* */
XPtrV *av; /* used by dbtestp_* */
} pos;
const char **wp_end; /* used by ptest_* */
Test_op (*isa)(struct test_env *, Test_meta);
const char *(*getopnd) (struct test_env *, Test_op, bool);
int (*eval)(struct test_env *, Test_op, const char *, const char *, bool);
void (*error)(struct test_env *, int, const char *);
int flags; /* TEF_* */
} Test_env;
extern const char *const dbtest_tokens[];
Test_op test_isop(Test_meta, const char *);
int test_eval(Test_env *, Test_op, const char *, const char *, bool);
int test_parse(Test_env *);
EXTERN int tty_fd E_INIT(-1); /* dup'd tty file descriptor */
EXTERN bool tty_devtty; /* true if tty_fd is from /dev/tty */
EXTERN struct termios tty_state; /* saved tty state */
extern void tty_init(bool, bool);
extern void tty_close(void);
/* be sure not to interfere with anyone else's idea about EXTERN */
#ifdef EXTERN_DEFINED
# undef EXTERN_DEFINED
# undef EXTERN
#endif
#undef E_INIT
#endif /* !MKSH_INCLUDES_ONLY */