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/* $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 (c) 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 person's 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 1.467 2011/05/02 22:52:52 tg Exp $");
#endif
#define MKSH_VERSION "R39 2011/05/02"
#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
#if !defined(MAP_FAILED)
/* XXX imake style */
# if defined(__linux)
#define MAP_FAILED ((void *)-1)
# elif defined(__bsdi__) || defined(__osf__) || defined(__ultrix)
#define MAP_FAILED ((caddr_t)-1)
# endif
#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 I__(i) = i
#else
# define I__(i)
# define EXTERN extern
# define EXTERN_DEFINED
#endif
#define NELEM(a) (sizeof(a) / sizeof((a)[0]))
#define BIT(i) (1 << (i)) /* define bit in flag */
/* Table flag type - needs > 16 and < 32 bits */
typedef int32_t Tflag;
/* 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)
/* 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[] I__("KSH_VERSION=@(#)MIRBSD KSH " MKSH_VERSION);
#define KSH_VERSION (initvsn + /* "KSH_VERSION=@(#)" */ 16)
EXTERN const char digits_uc[] I__("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
EXTERN const char digits_lc[] I__("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_((s), (ap)); \
} while (/* CONSTCOND */ 0)
#define strndupx(d, s, n, ap) do { \
(d) = strndup_((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
#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_i; /* 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_; /* real UID of shell */
uid_t ksheuid_; /* effective UID of shell */
gid_t kshgid_; /* real GID of shell */
gid_t kshegid_; /* effective GID of shell */
pid_t kshpgrp_; /* process group of shell */
pid_t kshppid_; /* PID of parent of shell */
pid_t kshpid_; /* $$, shell PID */
} rndsetupstate;
#define kshpid rndsetupstate.kshpid_
#define kshpgrp rndsetupstate.kshpgrp_
#define kshuid rndsetupstate.kshuid_
#define ksheuid rndsetupstate.ksheuid_
#define kshgid rndsetupstate.kshgid_
#define kshegid rndsetupstate.kshegid_
#define kshppid rndsetupstate.kshppid_
/* 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; comparision pointer for unset */
EXTERN char null[] I__("");
/* helpers for string pooling */
EXTERN const char T_intovfl[] I__("integer overflow %lu %c %lu prevented");
EXTERN const char T_oomem[] I__("can't allocate %lu data bytes");
#if defined(__GNUC__)
/* trust this to have string pooling; -Wformat bitches otherwise */
#define T_synerr "syntax error"
#else
EXTERN const char T_synerr[] I__("syntax error");
#endif
EXTERN const char T_select[] I__("select");
EXTERN const char T_r_fc_e_[] I__("r=fc -e -");
#define T_fc_e_ (T_r_fc_e_ + 2) /* "fc -e -" */
#define Tn_fc_e_ 7 /* strlen(T_fc_e_) */
EXTERN const char T_local_typeset[] I__("local=typeset");
#define T__typeset (T_local_typeset + 5) /* "=typeset" */
#define T_typeset (T_local_typeset + 6) /* "typeset" */
EXTERN const char T_palias[] I__("+alias");
#define T_alias (T_palias + 1) /* "alias" */
EXTERN const char T_punalias[] I__("+unalias");
#define T_unalias (T_punalias + 1) /* "unalias" */
EXTERN const char T_sgset[] I__("*=set");
#define T_set (T_sgset + 2) /* "set" */
EXTERN const char T_gbuiltin[] I__("=builtin");
#define T_builtin (T_gbuiltin + 1) /* "builtin" */
EXTERN const char T__function[] I__(" function");
#define T_function (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 SIGEXIT_ 0 /* for trap EXIT */
#define 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 I__(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 I__(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) /* $IFS */
#define C_SUBOP2 BIT(8) /* "#%" (magic, see below) */
extern unsigned char chtypes[];
#define ctype(c, t) tobool( ((t) == C_SUBOP2) ? \
(((c) == '#' || (c) == '%') ? 1 : 0) : \
(chtypes[(unsigned char)(c)] & (t)) )
#define ksh_isalphx(c) ctype((c), C_ALPHA)
#define ksh_isalnux(c) ctype((c), C_ALPHA | C_DIGIT)
EXTERN int ifs0 I__(' '); /* for "$*" */
/* 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 -- */
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 */
typedef int32_t Coproc_id; /* something that won't (realisticly) wrap */
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;
EXTERN Tflag builtin_flag; /* flags of called builtin (SPEC_BI, etc.) */
/* 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 I__(80); /* tty columns */
EXTERN mksh_ari_t x_lins I__(-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 */
#define KSH_SYSTEM_PROFILE "/etc/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))
#ifdef MKSH_SMALL
int shf_getc(struct shf *);
int shf_putc(int, struct shf *);
#else
#define shf_getc(shf) ((shf)->rnleft > 0 ? \
(shf)->rnleft--, *(shf)->rp++ : \
shf_getchar(shf))
#define shf_putc(c, shf) ((shf)->wnleft == 0 ? \
shf_putchar((c), (shf)) : \
((shf)->wnleft--, *(shf)->wp++ = (c)))
#endif
#define shf_eof(shf) ((shf)->flags & SHF_EOF)
#define shf_error(shf) ((shf)->flags & SHF_ERROR)
#define shf_errno(shf) ((shf)->errno_)
#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 */
int flags; /* see SHF_* */
int rbsize; /* size of buffer (1 if SHF_UNBUF) */
int rnleft; /* read: how much data left in buffer */
int wbsize; /* size of buffer (0 if SHF_UNBUF) */
int wnleft; /* write: how much space left in buffer */
int fd; /* file descriptor */
int errno_; /* saved value of errno after error */
int bsize; /* actual size of buf */
};
extern struct shf shf_iob[];
struct table {
Area *areap; /* area to allocate entries */
struct tbl **tbls; /* hashed table items */
short size, nfree; /* hash size (always 2^^n), free entries */
};
struct tbl { /* table item */
Area *areap; /* area to allocate from */
union {
char *s; /* string */
mksh_ari_t i; /* integer */
mksh_uari_t u; /* unsigned integer */
int (*f)(const char **); /* int function */
struct op *t; /* "function" tree */
} val; /* value */
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 errno_; /* CEXEC/CTALIAS */
} u2;
int type; /* command type (see below), base (if INTEGER),
* or offset from val.s of value (if EXPORT) */
Tflag flag; /* flags */
union {
uint32_t hval; /* hash(name) */
uint32_t index; /* index for an array */
} ua;
char name[4]; /* name -- variable length */
};
/* 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))
/* 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).argc_ - (a).skip)
/* Argument info. Used for $#, $* for shell, functions, includes, etc. */
struct arg_info {
const char **argv;
int flags; /* AF_* */
int 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 */
union {
/* WARNING: newtp(), tcopy() use evalflags = 0 to clear union */
short evalflags; /* TCOM: arg expansion eval() flags */
short ksh_func; /* TFUNC: function x (vs x()) */
} 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. */
/* 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) /* ditto : 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 { \
int more = ((xp) + (n)) - (xs).end; \
if (more > 0) \
(xp) = Xcheck_grow_(&(xs), (xp), (size_t)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 **vp__; \
vp__ = alloc2((n), sizeof(void *), ATEMP); \
(x).cur = (x).beg = vp__; \
(x).end = 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 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 LETARRAY BIT(12) /* copy expression inside =( ) */
#define HERES 10 /* max << 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) && (fac2) && \
(SIZE_MAX / (fac1) < (fac2)))
#define notoktoadd(val, cnst) ((val) > (SIZE_MAX - (cnst)))
#define checkoktoadd(val, cnst) do { \
if (notoktoadd((val), (cnst))) \
internal_errorf(T_intovfl, (unsigned long)(val), \
'+', (unsigned long)(cnst)); \
} while (/* CONSTCOND */ 0)
/* Bob Jenkins' one-at-a-time hash, with better start value */
#define oaat1_init_impl(h) do { \
(h) = 0x100; \
} while (/* CONSTCOND */ 0)
#define oaat1_addmem_impl(h, buf, len) do { \
register const uint8_t *oaat1_addmem_p = (const void *)(buf); \
register size_t oaat1_addmem_n = (len); \
\
while (oaat1_addmem_n--) { \
(h) += *oaat1_addmem_p++; \
(h) += (h) << 10; \
(h) ^= (h) >> 6; \
} \
} while (/* CONSTCOND */ 0)
#define oaat1_addstr_impl(h, s) do { \
register const uint8_t *oaat1_addstr_p = (const void *)(s); \
register uint8_t oaat1_addstr_c; \
\
while ((oaat1_addstr_c = *oaat1_addstr_p++)) { \
h += oaat1_addstr_c; \
(h) += (h) << 10; \
(h) ^= (h) >> 6; \
} \
} while (/* CONSTCOND */ 0)
#define oaat1_fini_impl(h) do { \
(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);
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(const char *, const char *, int, int *);
int search_access(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 **);
int 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
/* 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_label(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(struct table *, Area *, size_t);
struct tbl *ktsearch(struct table *, const char *, uint32_t);
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(const char *);
char *quote_value(const char *);
void print_columns(struct shf *, int,
char *(*)(char *, int, int, const void *),
const void *, int, int, 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_(const char *, Area *);
char *strndup_(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 *, int, int, struct shf *);
int shf_close(struct shf *);
int shf_fdclose(struct shf *);
char *shf_sclose(struct shf *);
int shf_flush(struct shf *);
int shf_read(char *, int, struct shf *);
char *shf_getse(char *, int, struct shf *);
int shf_getchar(struct shf *s);
int shf_ungetc(int, struct shf *);
int shf_putchar(int, struct shf *);
int shf_puts(const char *, struct shf *);
int shf_write(const char *, int, struct shf *);
int shf_fprintf(struct shf *, const char *, ...)
MKSH_A_FORMAT(__printf__, 2, 3);
int shf_snprintf(char *, int, 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);
int 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 *, int, 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 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);
struct tbl *typeset(const char *, Tflag, Tflag, 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 *, int);
int is_wdvarname(const char *, int);
int is_wdvarassign(const char *);
char **makenv(void);
void change_winsz(void);
int 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 {
TO_NONOP = 0, /* non-operator */
/* 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 I__(-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 I__
#endif /* !MKSH_INCLUDES_ONLY */
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