/* $OpenBSD: sh.h,v 1.33 2013/12/18 13:53:12 millert Exp $ */ /* $OpenBSD: shf.h,v 1.6 2005/12/11 18:53:51 deraadt Exp $ */ /* $OpenBSD: table.h,v 1.8 2012/02/19 07:52:30 otto Exp $ */ /* $OpenBSD: tree.h,v 1.10 2005/03/28 21:28:22 deraadt Exp $ */ /* $OpenBSD: expand.h,v 1.6 2005/03/30 17:16:37 deraadt Exp $ */ /* $OpenBSD: lex.h,v 1.13 2013/03/03 19:11:34 guenther Exp $ */ /* $OpenBSD: proto.h,v 1.35 2013/09/04 15:49:19 millert Exp $ */ /* $OpenBSD: c_test.h,v 1.4 2004/12/20 11:34:26 otto Exp $ */ /* $OpenBSD: tty.h,v 1.5 2004/12/20 11:34:26 otto Exp $ */ /*- * Copyright © 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, * 2011, 2012, 2013, 2014, 2015 * Thorsten Glaser * * 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 #endif #include #if HAVE_BOTH_TIME_H #include #include #elif HAVE_SYS_TIME_H #include #elif HAVE_TIME_H #include #endif #include #if HAVE_SYS_SYSMACROS_H #include #endif #if HAVE_SYS_MKDEV_H #include #endif #if HAVE_SYS_MMAN_H #include #endif #if HAVE_SYS_RESOURCE_H #include #endif #include #include #include #include #include #if HAVE_LIBGEN_H #include #endif #if HAVE_LIBUTIL_H #include #endif #include #if HAVE_PATHS_H #include #endif #include #include #include #include #include #if HAVE_STDINT_H #include #endif #include #include #include #if HAVE_STRINGS_H #include #endif #if HAVE_TERMIOS_H #include #else /* shudder… */ #include #endif #ifdef _ISC_UNIX /* XXX imake style */ #include #endif #if HAVE_ULIMIT_H #include #endif #include #if HAVE_VALUES_H #include #endif #undef __attribute__ #if HAVE_ATTRIBUTE_BOUNDED #define MKSH_A_BOUNDED(x,y,z) __attribute__((__bounded__(x, y, z))) #else #define MKSH_A_BOUNDED(x,y,z) /* nothing */ #endif #if HAVE_ATTRIBUTE_FORMAT #define MKSH_A_FORMAT(x,y,z) __attribute__((__format__(x, y, z))) #else #define MKSH_A_FORMAT(x,y,z) /* nothing */ #endif #if HAVE_ATTRIBUTE_NORETURN #define MKSH_A_NORETURN __attribute__((__noreturn__)) #else #define MKSH_A_NORETURN /* nothing */ #endif #if HAVE_ATTRIBUTE_PURE #define MKSH_A_PURE __attribute__((__pure__)) #else #define MKSH_A_PURE /* 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 1.732 2015/07/05 14:43:08 tg Exp $"); #endif #define MKSH_VERSION "R51 2015/06/28" /* arithmetic types: C implementation */ #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 /* arithmetic types: shell arithmetics */ #ifdef MKSH_LEGACY_MODE /* * POSIX demands these to be the C environment's long type */ typedef long mksh_ari_t; typedef unsigned long mksh_uari_t; #else /* * These types are exactly 32 bit wide; signed and unsigned * integer wraparound, even across division and modulo, for * any shell code using them, is guaranteed. */ typedef int32_t mksh_ari_t; typedef uint32_t mksh_uari_t; #endif /* boolean type (no deliberately) */ typedef unsigned char mksh_bool; #undef bool /* false MUST equal the same 0 as written by static storage initialisation */ #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) /* char (octet) type: C implementation */ #if !HAVE_CAN_INT8TYPE #if !HAVE_CAN_UCBINT8 typedef unsigned char uint8_t; #else typedef u_int8_t uint8_t; #endif #endif /* other standard types */ #if !HAVE_RLIM_T typedef unsigned long rlim_t; #endif #if !HAVE_SIG_T #undef sig_t typedef void (*sig_t)(int); #endif #ifdef MKSH_TYPEDEF_SIG_ATOMIC_T typedef MKSH_TYPEDEF_SIG_ATOMIC_T sig_atomic_t; #endif #ifdef MKSH_TYPEDEF_SSIZE_T typedef MKSH_TYPEDEF_SSIZE_T ssize_t; #endif /* un-do vendor damage */ #undef BAD /* AIX defines that somewhere */ #undef PRINT /* LynxOS defines that somewhere */ #undef flock /* SCO UnixWare defines that to flock64 but ENOENT */ #ifndef MKSH_INCLUDES_ONLY /* 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 /* 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 #ifdef MKSH__NO_PATH_MAX #undef PATH_MAX #else #ifndef PATH_MAX #ifdef MAXPATHLEN #define PATH_MAX MAXPATHLEN #else #define PATH_MAX 1024 #endif #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 /* determine ksh_NSIG: first, use the traditional definitions */ #undef ksh_NSIG #if defined(NSIG) #define ksh_NSIG NSIG #elif defined(_NSIG) #define ksh_NSIG _NSIG #elif defined(SIGMAX) #define ksh_NSIG (SIGMAX + 1) #elif defined(_SIGMAX) #define ksh_NSIG (_SIGMAX + 1) #elif defined(NSIG_MAX) #define ksh_NSIG NSIG_MAX #else # error Please have your platform define NSIG. #endif /* range-check them */ #if (ksh_NSIG < 1) # error Your NSIG value is not positive. #undef ksh_NSIG #endif /* second, see if the new POSIX definition is available */ #ifdef NSIG_MAX #if (NSIG_MAX < 2) /* and usable */ # error Your NSIG_MAX value is too small. #undef NSIG_MAX #elif (ksh_NSIG > NSIG_MAX) /* and realistic */ # error Your NSIG value is larger than your NSIG_MAX value. #undef NSIG_MAX #else /* since it’s usable, prefer it */ #undef ksh_NSIG #define ksh_NSIG NSIG_MAX #endif /* if NSIG_MAX is now still defined, use sysconf(_SC_NSIG) at runtime */ #endif /* third, for cpp without the error directive, default */ #ifndef ksh_NSIG #define ksh_NSIG 64 #endif /* OS-dependent additions (functions, variables, by OS) */ #if !HAVE_FLOCK_DECL extern int flock(int, int); #endif #if !HAVE_GETTIMEOFDAY #define mksh_TIME(tv) do { \ (tv).tv_usec = 0; \ (tv).tv_sec = time(NULL); \ } while (/* CONSTCOND */ 0) #else #define mksh_TIME(tv) gettimeofday(&(tv), NULL) #endif #if !HAVE_GETRUSAGE extern int getrusage(int, struct rusage *); #endif #if !HAVE_MEMMOVE /* we assume either memmove or bcopy exist, at the moment */ #define memmove(dst, src, len) bcopy((src), (dst), (len)) #endif #if !HAVE_REVOKE_DECL extern int revoke(const char *); #endif #if defined(DEBUG) || !HAVE_STRERROR #undef strerror #define strerror /* poisoned */ dontuse_strerror #define cstrerror /* replaced */ cstrerror extern const char *cstrerror(int); #else #define cstrerror(errnum) ((const char *)strerror(errnum)) #endif #if !HAVE_STRLCPY size_t strlcpy(char *, const char *, size_t); #endif #ifdef __INTERIX /* XXX imake style */ #define makedev mkdev extern int __cdecl seteuid(uid_t); extern int __cdecl setegid(gid_t); #endif #if defined(__COHERENT__) #ifndef O_ACCMODE /* this need not work everywhere, take care */ #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR) #endif #endif #ifndef O_BINARY #define O_BINARY 0 #endif #ifdef MKSH__NO_SYMLINK #undef S_ISLNK #define S_ISLNK(m) (/* CONSTCOND */ 0) #define mksh_lstat stat #else #define mksh_lstat lstat #endif #if HAVE_TERMIOS_H #define mksh_ttyst struct termios #define mksh_tcget(fd,st) tcgetattr((fd), (st)) #define mksh_tcset(fd,st) tcsetattr((fd), TCSADRAIN, (st)) #else #define mksh_ttyst struct termio #define mksh_tcget(fd,st) ioctl((fd), TCGETA, (st)) #define mksh_tcset(fd,st) ioctl((fd), TCSETAW, (st)) #endif #ifndef ISTRIP #define ISTRIP 0 #endif /* 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])) /* * 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) EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */ #ifdef MKSH_LEGACY_MODE #define KSH_VERSIONNAME "LEGACY" #else #define KSH_VERSIONNAME "MIRBSD" #endif EXTERN const char initvsn[] E_INIT("KSH_VERSION=@(#)" KSH_VERSIONNAME \ " 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"); #define letters_uc (digits_uc + 10) #define letters_lc (digits_lc + 10) /* * 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; }; /* * Evil hack since casting uint to sint is implementation-defined */ typedef union { mksh_ari_t i; mksh_uari_t u; } mksh_ari_u; /* 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) #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) #endif #if defined(DEBUG) || defined(__COVERITY__) #define mkssert(e) do { if (!(e)) exit(255); } while (/* CONSTCOND */ 0) #ifndef DEBUG_LEAKS #define DEBUG_LEAKS #endif #else #define mkssert(e) do { } while (/* CONSTCOND */ 0) #endif #if (!defined(MKSH_BUILDMAKEFILE4BSD) && !defined(MKSH_BUILDSH)) || (MKSH_BUILD_R != 510) #error Must run Build.sh to compile this. extern void thiswillneverbedefinedIhope(void); int im_sorry_dave(void) { /* I’m sorry, Dave. I’m afraid I can’t do that. */ return (thiswillneverbedefinedIhope()); } #endif /* use this ipv strchr(s, 0) but no side effects in s! */ #define strnul(s) ((s) + strlen(s)) #define utf_ptradjx(src, dst) do { \ (dst) = (src) + utf_ptradj(src); \ } while (/* CONSTCOND */ 0) #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST) #define strdupx(d, s, ap) do { \ (d) = strdup_i((s), (ap)); \ } while (/* CONSTCOND */ 0) #define strndupx(d, s, n, ap) do { \ (d) = strndup_i((s), (n), (ap)); \ } while (/* CONSTCOND */ 0) #else /* be careful to evaluate arguments only once! */ #define strdupx(d, s, ap) do { \ const char *strdup_src = (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 #ifdef MKSH_LEGACY_MODE #ifndef MKSH_NO_CMDLINE_EDITING #define MKSH_NO_CMDLINE_EDITING /* defined */ #endif #ifndef MKSH_CONSERVATIVE_FDS #define MKSH_CONSERVATIVE_FDS /* defined */ #endif #undef MKSH_S_NOVI #define MKSH_S_NOVI 1 #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 /* 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 /* * 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 #ifdef MKSH__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.gen" FNFLAGS /* (place holder: how many flags are there) */ }; #define Flag(f) (shell_flags[(int)(f)]) #define UTFMODE Flag(FUNICODE) /* * parsing & execution environment * * note that kshlongjmp MUST NOT be passed 0 as second argument! */ #ifdef MKSH_NO_SIGSETJMP #define kshjmp_buf jmp_buf #define kshsetjmp(jbuf) _setjmp(jbuf) #define kshlongjmp _longjmp #else #define kshjmp_buf sigjmp_buf #define kshsetjmp(jbuf) sigsetjmp((jbuf), 0) #define kshlongjmp siglongjmp #endif struct sretrace_info; struct yyrecursive_state; EXTERN struct sretrace_info *retrace_info E_INIT(NULL); EXTERN int subshell_nesting_type E_INIT(0); 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 */ /* saved parser recursion state */ struct yyrecursive_state *yyrecursive_statep; kshjmp_buf jbuf; /* long jump back to env creator */ uint8_t type; /* environment type - see below */ uint8_t 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 # */ #define E_GONE 7 /* hidden in child */ /* # indicates env has valid jbuf (see unwind()) */ /* struct env.flag values */ #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 kshlongjmp(e->jbuf, i) */ /* note that i MUST NOT be zero */ #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) /* 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 %zu 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 T_typeset[] E_INIT("=typeset"); #define Ttypeset (T_typeset + 1) /* "typeset" */ EXTERN const char Talias[] E_INIT("alias"); EXTERN const char Tunalias[] E_INIT("unalias"); EXTERN const char Tsgset[] E_INIT("*=set"); #define Tset (Tsgset + 2) /* "set" */ EXTERN const char Tsgexport[] E_INIT("*=export"); #define Texport (Tsgexport + 2) /* "export" */ EXTERN const char Tsgreadonly[] E_INIT("*=readonly"); #define Treadonly (Tsgreadonly + 2) /* "readonly" */ 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" */ EXTERN const char TC_LEX1[] E_INIT("|&;<>() \t\n"); #define TC_IFSWS (TC_LEX1 + 7) /* space tab newline */ typedef uint8_t Temp_type; /* expanded heredoc */ #define TT_HEREDOC_EXP 0 /* temporary file used for history editing (fc -e) */ #define TT_HIST_EDIT 1 /* temporary file used during in-situ command substitution */ #define TT_FUNSUB 2 /* temp/heredoc files. The file is removed when the struct is freed. */ struct temp { struct temp *next; struct shf *shf; /* pid of process parsed here-doc */ pid_t pid; Temp_type type; /* actually longer: name (variable length) */ char tffn[3]; }; /* * stdio and our IO routines */ #define shl_xtrace (&shf_iob[0]) /* for set -x */ #define shl_stdout (&shf_iob[1]) #define shl_out (&shf_iob[2]) #ifdef DF #define shl_dbg (&shf_iob[3]) /* for DF() */ #endif 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 ksh_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[ksh_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 bool 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) /* $IFS */ #define C_SUBOP2 BIT(8) /* "#%" (magic, see below) */ extern unsigned char chtypes[]; #define ctype(c, t) tobool( ((t) == C_SUBOP2) ? \ (((c) == '#' || (c) == '%') ? 1 : 0) : \ (chtypes[(unsigned char)(c)] & (t)) ) #define ord(c) ((int)(unsigned char)(c)) #define ksh_isalphx(c) ctype((c), C_ALPHA) #define ksh_isalnux(c) ctype((c), C_ALPHA | C_DIGIT) #define ksh_isdigit(c) (((c) >= '0') && ((c) <= '9')) #define ksh_islower(c) (((c) >= 'a') && ((c) <= 'z')) #define ksh_isupper(c) (((c) >= 'A') && ((c) <= 'Z')) #define ksh_tolower(c) (ksh_isupper(c) ? (c) - 'A' + 'a' : (c)) #define ksh_toupper(c) (ksh_islower(c) ? (c) - 'a' + 'A' : (c)) #define ksh_isdash(s) (((s)[0] == '-') && ((s)[1] == '\0')) #define ksh_isspace(c) ((((c) >= 0x09) && ((c) <= 0x0D)) || ((c) == 0x20)) #define ksh_eq(c,u,l) (((c) | 0x20) == (l)) #define ksh_numdig(c) ((c) - ord('0')) #define ksh_numuc(c) ((c) - ord('A')) #define ksh_numlc(c) ((c) - ord('a')) EXTERN int ifs0 E_INIT(' '); /* for "$*" */ /* 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; /* is called builtin SPEC_BI? */ EXTERN bool builtin_spec; /* current working directory */ EXTERN char *current_wd; /* input line size */ #define LINE (4096 - ALLOC_SIZE) /* * 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(24); /* tty lines */ /* Determine the location of the system (common) profile */ #ifndef MKSH_DEFAULT_PROFILEDIR #if defined(ANDROID) #define MKSH_DEFAULT_PROFILEDIR "/system/etc" #else #define MKSH_DEFAULT_PROFILEDIR "/etc" #endif #endif #define MKSH_SYSTEM_PROFILE MKSH_DEFAULT_PROFILEDIR "/profile" #define MKSH_SUID_PROFILE MKSH_DEFAULT_PROFILEDIR "/suid_profile" /* Used by v_evaluate() and setstr() to control action when error occurs */ #define KSH_UNWIND_ERROR 0 /* unwind the stack (kshlongjmp) */ #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]; }; EXTERN struct tbl vtemp; /* 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 */ /* * 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)) enum namerefflag { SRF_NOP, SRF_ENABLE, SRF_DISABLE }; /* 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 */ #define FC_NORMBI BIT(2) /* not special builtin */ #define FC_BI (FC_SPECBI | FC_NORMBI) #define FC_PATH BIT(3) /* do path search */ #define FC_DEFPATH BIT(4) /* 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 */ #define BF_STOPENV BIT(1) /* do not export further */ /* * 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 uint8_t cur_prompt; /* PS1 or PS2 */ EXTERN int current_lineno; /* LINENO value */ /* * 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} */ #define FUNSUB 14 /* ${ foo;} substitution (NUL terminated) */ #define VALSUB 15 /* ${|foo;} substitution (NUL terminated) */ /* * IO redirection */ struct ioword { char *name; /* filename (unused if heredoc) */ char *delim; /* delimiter for <<, <<- */ char *heredoc; /* content of heredoc */ unsigned short ioflag; /* action (below) */ short unit; /* unit (fd) affected */ }; /* 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 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 */ #define DOTCOMEXEC BIT(11) /* not an eval flag, used by sh -c hack */ #define DOSCALAR BIT(12) /* change field handling to non-list context */ #define DOHEREDOC BIT(13) /* change scalar handling to heredoc body */ #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), (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 { /* begin of allocated area */ void **beg; /* currently used number of entries */ size_t len; /* allocated number of entries */ size_t siz; } XPtrV; #define XPinit(x, n) do { \ (x).siz = (n); \ (x).len = 0; \ (x).beg = alloc2((x).siz, sizeof(void *), ATEMP); \ } while (/* CONSTCOND */ 0) \ #define XPput(x, p) do { \ if ((x).len == (x).siz) { \ (x).beg = aresize2((x).beg, (x).siz, \ 2 * sizeof(void *), ATEMP); \ (x).siz <<= 1; \ } \ (x).beg[(x).len++] = (p); \ } while (/* CONSTCOND */ 0) #define XPptrv(x) ((x).beg) #define XPsize(x) ((x).len) #define XPclose(x) aresize2((x).beg, XPsize(x), sizeof(void *), ATEMP) #define XPfree(x) afree((x).beg, ATEMP) /* * Lexer internals */ 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 */ #define SSTRINGCMDLINE 9 /* string from "mksh -c ..." */ /* 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) */ #define SF_MAYEXEC BIT(5) /* special sh -c optimisation hack */ 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 HEREDELIM BIT(8) /* parsing <<,<<- delimiter */ #define LQCHAR BIT(9) /* source string contains QCHAR */ #define HEREDOC BIT(10) /* parsing a here document body */ #define HERES 10 /* max number of << in line */ #undef CTRL #define CTRL(x) ((x) == '?' ? 0x7F : (x) & 0x1F) /* ASCII */ #define UNCTRL(x) ((x) ^ 0x40) /* ASCII */ #define ISCTRL(x) (((signed char)((uint8_t)(x) + 1)) < 33) #define IDENT 64 EXTERN Source *source; /* yyparse/yylex source */ EXTERN YYSTYPE yylval; /* result from yylex */ EXTERN struct ioword *heres[HERES], **herep; EXTERN char ident[IDENT + 1]; EXTERN char **history; /* saved commands */ EXTERN char **histptr; /* last history item */ EXTERN mksh_ari_t histsize; /* history size */ /* user and system time of last j_waitjed job */ EXTERN struct timeval j_usrtime, j_systime; #define notok2mul(max, val, c) (((val) != 0) && ((c) != 0) && \ (((max) / (c)) < (val))) #define notok2add(max, val, c) ((val) > ((max) - (c))) #define notoktomul(val, cnst) notok2mul(SIZE_MAX, (val), (cnst)) #define notoktoadd(val, cnst) notok2add(SIZE_MAX, (val), (cnst)) #define checkoktoadd(val, cnst) do { \ if (notoktoadd((val), (cnst))) \ internal_errorf(Tintovfl, (size_t)(val), \ '+', (size_t)(cnst)); \ } 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_NO_CMDLINE_EDITING #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); #ifdef DEBUG_LEAKS void x_done(void); #endif int x_read(char *); #endif void x_mkraw(int, mksh_ttyst *, bool); /* 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 *, bool); char *do_tilde(char *); /* 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 *); void pr_menu(const char * const *); void 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 *) MKSH_A_PURE; const char *utf_skipcols(const char *, int) MKSH_A_PURE; size_t utf_ptradj(const char *) MKSH_A_PURE; int utf_wcwidth(unsigned int) MKSH_A_PURE; int ksh_access(const char *, int); struct tbl *tempvar(void); /* 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 **); #ifndef MKSH_NO_CMDLINE_EDITING int c_bind(const char **); #endif 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(mksh_ari_t); #if HAVE_PERSISTENT_HISTORY void sethistfile(const char *); #endif #if !defined(MKSH_NO_CMDLINE_EDITING) && !MKSH_S_NOVI char **histpos(void) MKSH_A_PURE; int histnum(int); #endif int findhist(int, int, const char *, bool) MKSH_A_PURE; char **hist_get_newest(bool); void inittraps(void); void alarm_init(void); Trap *gettrap(const char *, bool, bool); 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); #if HAVE_FLOCK || HAVE_LOCK_FCNTL void mksh_lockfd(int); void mksh_unlkfd(int); #endif /* 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 #if !defined(MKSH_UNEMPLOYED) && HAVE_GETSID void j_suspend(void); #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 yyskiputf8bom(void); void yyerror(const char *, ...) MKSH_A_NORETURN MKSH_A_FORMAT(__printf__, 1, 2); Source *pushs(int, Area *); void set_prompt(int, Source *); int pprompt(const char *, int); /* main.c */ int include(const char *, int, const char **, bool); int command(const char *, int); int shell(Source * volatile, volatile bool); /* argument MUST NOT be 0 */ 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(NULL) #define errorfxz(rc) errorfx((rc), NULL) #define bi_errorfz() bi_errorf(NULL) 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 *); #ifdef DF void DF(const char *, ...) MKSH_A_FORMAT(__printf__, 1, 2); #endif /* misc.c */ void setctypes(const char *, int); void initctypes(void); size_t option(const char *) MKSH_A_PURE; char *getoptions(void); void change_flag(enum sh_flag, int, bool); void change_xtrace(unsigned char, bool); int parse_args(const char **, int, bool *); int getn(const char *, int *); int gmatchx(const char *, const char *, bool); int has_globbing(const char *, const char *) MKSH_A_PURE; int xstrcmp(const void *, const void *) MKSH_A_PURE; 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 *, unsigned int, void (*)(char *, size_t, unsigned int, const void *), const void *, size_t, size_t, bool); void strip_nuls(char *, size_t) MKSH_A_BOUNDED(__string__, 1, 2); 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 **); #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST) 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 *); #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST) 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 */ int assign_command(const char *); void initkeywords(void); struct op *compile(Source *, bool); bool parse_usec(const char *, struct timeval *); char *yyrecursive(int); void yyrecursive_pop(bool); /* 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 block *varsearch(struct block *, struct tbl **, const char *, uint32_t); 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); void unset(struct tbl *, int); const char *skip_varname(const char *, bool) MKSH_A_PURE; const char *skip_wdvarname(const char *, bool) MKSH_A_PURE; int is_wdvarname(const char *, bool) MKSH_A_PURE; int is_wdvarassign(const char *) MKSH_A_PURE; struct tbl *arraysearch(struct tbl *, uint32_t); char **makenv(void); void change_winsz(void); size_t array_ref_len(const char *) MKSH_A_PURE; char *arrayname(const char *); mksh_uari_t set_array(const char *, bool, const char **); uint32_t hash(const void *) MKSH_A_PURE; uint32_t chvt_rndsetup(const void *, size_t) MKSH_A_PURE; mksh_ari_t rndget(void); void rndset(unsigned long); void rndpush(const void *); 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 *) MKSH_A_PURE; int test_eval(Test_env *, Test_op, const char *, const char *, bool); int test_parse(Test_env *); /* tty_fd is not opened O_BINARY, it's thus never read/written */ 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 mksh_ttyst tty_state; /* saved tty state */ EXTERN bool tty_hasstate; /* true if tty_state is valid */ extern int tty_init_fd(void); /* initialise tty_fd, tty_devtty */ /* 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 */