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busybox/ash.h
Eric Andersen cb57d551a2 This a an ash applet I put together. It is similar to the one put 
together by vodz, but uses newer sources, has the removed features
commented out instead of simply deleted (so they could be re-enabled)
and the builtins all work.  This adds 72k.
 -Erik
2001-06-28 07:25:16 +00:00

1226 lines
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/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* $NetBSD: alias.h,v 1.4 1995/05/11 21:28:42 christos Exp $ */
#define ALIASINUSE 1
#define ALIASDEAD 2
struct alias {
struct alias *next;
char *name;
char *val;
int flag;
};
struct alias *lookupalias __P((const char *, int));
static int aliascmd __P((int, char **));
static int unaliascmd __P((int, char **));
static void rmaliases __P((void));
static int unalias __P((char *));
static void printalias __P((const struct alias *));
#define ARITH_NUM 257
#define ARITH_LPAREN 258
#define ARITH_RPAREN 259
#define ARITH_OR 260
#define ARITH_AND 261
#define ARITH_BOR 262
#define ARITH_BXOR 263
#define ARITH_BAND 264
#define ARITH_EQ 265
#define ARITH_NE 266
#define ARITH_LT 267
#define ARITH_GT 268
#define ARITH_GE 269
#define ARITH_LE 270
#define ARITH_LSHIFT 271
#define ARITH_RSHIFT 272
#define ARITH_ADD 273
#define ARITH_SUB 274
#define ARITH_MUL 275
#define ARITH_DIV 276
#define ARITH_REM 277
#define ARITH_UNARYMINUS 278
#define ARITH_UNARYPLUS 279
#define ARITH_NOT 280
#define ARITH_BNOT 281
/*
* This file was generated by the mkbuiltins program.
*/
#define BUILTIN_SPECIAL 0x1
#define BUILTIN_REGULAR 0x2
#define BUILTIN_ASSIGN 0x4
struct builtincmd {
const char *name;
int (*const builtinfunc) __P((int, char **));
unsigned flags;
};
extern const struct builtincmd builtincmds[];
/* $NetBSD: cd.h,v 1.2 1997/07/04 21:01:52 christos Exp $ */
static int cdcmd __P((int, char **));
static int pwdcmd __P((int, char **));
static void setpwd __P((const char *, int));
/* $NetBSD: error.h,v 1.14 2001/02/04 19:52:06 christos Exp $ */
/*
* Types of operations (passed to the errmsg routine).
*/
#define E_OPEN 01 /* opening a file */
#define E_CREAT 02 /* creating a file */
#define E_EXEC 04 /* executing a program */
/*
* We enclose jmp_buf in a structure so that we can declare pointers to
* jump locations. The global variable handler contains the location to
* jump to when an exception occurs, and the global variable exception
* contains a code identifying the exeception. To implement nested
* exception handlers, the user should save the value of handler on entry
* to an inner scope, set handler to point to a jmploc structure for the
* inner scope, and restore handler on exit from the scope.
*/
struct jmploc {
jmp_buf loc;
};
extern struct jmploc *handler;
extern int exception;
/* exceptions */
#define EXINT 0 /* SIGINT received */
#define EXERROR 1 /* a generic error */
#define EXSHELLPROC 2 /* execute a shell procedure */
#define EXEXEC 3 /* command execution failed */
/*
* These macros allow the user to suspend the handling of interrupt signals
* over a period of time. This is similar to SIGHOLD to or sigblock, but
* much more efficient and portable. (But hacking the kernel is so much
* more fun than worrying about efficiency and portability. :-))
*/
extern int suppressint;
extern volatile int intpending;
#define INTOFF suppressint++
#ifdef REALLY_SMALL
static void __inton __P((void));
#define INTON __inton()
#else
#define INTON { if (--suppressint == 0 && intpending) onint(); }
#endif
#define FORCEINTON {suppressint = 0; if (intpending) onint();}
#define CLEAR_PENDING_INT intpending = 0
#define int_pending() intpending
static void exraise __P((int)) __attribute__((__noreturn__));
static void onint __P((void));
static void error __P((const char *, ...)) __attribute__((__noreturn__));
static void exerror __P((int, const char *, ...)) __attribute__((__noreturn__));
static const char *errmsg __P((int, int));
/*
* BSD setjmp saves the signal mask, which violates ANSI C and takes time,
* so we use _setjmp instead.
*/
#if defined(BSD) && !defined(__SVR4) && !defined(__GLIBC__)
#define setjmp(jmploc) _setjmp(jmploc)
#define longjmp(jmploc, val) _longjmp(jmploc, val)
#endif
/* $NetBSD: shell.h,v 1.13 2000/05/22 10:18:47 elric Exp $ */
/*
* The follow should be set to reflect the type of system you have:
* JOBS -> 1 if you have Berkeley job control, 0 otherwise.
* SHORTNAMES -> 1 if your linker cannot handle long names.
* define BSD if you are running 4.2 BSD or later.
* define SYSV if you are running under System V.
* define DEBUG=1 to compile in debugging (set global "debug" to turn on)
* define DEBUG=2 to compile in and turn on debugging.
*
* When debugging is on, debugging info will be written to $HOME/trace and
* a quit signal will generate a core dump.
*/
#define JOBS 1
#ifndef BSD
#define BSD 1
#endif
#ifdef __STDC__
typedef void *pointer;
#ifndef NULL
#define NULL (void *)0
#endif
#else /* not __STDC__ */
typedef char *pointer;
#ifndef NULL
#define NULL 0
#endif
#endif /* not __STDC__ */
extern char nullstr[1]; /* null string */
#ifdef DEBUG
#define TRACE(param) trace param
#else
#define TRACE(param)
#endif
/*
* This file was generated by the mknodes program.
*/
#define NSEMI 0
#define NCMD 1
#define NPIPE 2
#define NREDIR 3
#define NBACKGND 4
#define NSUBSHELL 5
#define NAND 6
#define NOR 7
#define NIF 8
#define NWHILE 9
#define NUNTIL 10
#define NFOR 11
#define NCASE 12
#define NCLIST 13
#define NDEFUN 14
#define NARG 15
#define NTO 16
#define NFROM 17
#define NFROMTO 18
#define NAPPEND 19
#define NTOOV 20
#define NTOFD 21
#define NFROMFD 22
#define NHERE 23
#define NXHERE 24
#define NNOT 25
struct nbinary {
int type;
union node *ch1;
union node *ch2;
};
struct ncmd {
int type;
int backgnd;
union node *assign;
union node *args;
union node *redirect;
};
struct npipe {
int type;
int backgnd;
struct nodelist *cmdlist;
};
struct nredir {
int type;
union node *n;
union node *redirect;
};
struct nif {
int type;
union node *test;
union node *ifpart;
union node *elsepart;
};
struct nfor {
int type;
union node *args;
union node *body;
char *var;
};
struct ncase {
int type;
union node *expr;
union node *cases;
};
struct nclist {
int type;
union node *next;
union node *pattern;
union node *body;
};
struct narg {
int type;
union node *next;
char *text;
struct nodelist *backquote;
};
struct nfile {
int type;
union node *next;
int fd;
union node *fname;
char *expfname;
};
struct ndup {
int type;
union node *next;
int fd;
int dupfd;
union node *vname;
};
struct nhere {
int type;
union node *next;
int fd;
union node *doc;
};
struct nnot {
int type;
union node *com;
};
union node {
int type;
struct nbinary nbinary;
struct ncmd ncmd;
struct npipe npipe;
struct nredir nredir;
struct nif nif;
struct nfor nfor;
struct ncase ncase;
struct nclist nclist;
struct narg narg;
struct nfile nfile;
struct ndup ndup;
struct nhere nhere;
struct nnot nnot;
};
struct nodelist {
struct nodelist *next;
union node *n;
};
#ifdef __STDC__
union node *copyfunc(union node *);
static void freefunc(union node *);
#else
union node *copyfunc();
static void freefunc();
#endif
/* $NetBSD: eval.h,v 1.10 2000/01/27 23:39:40 christos Exp $ */
extern char *commandname; /* currently executing command */
extern int exitstatus; /* exit status of last command */
extern struct strlist *cmdenviron; /* environment for builtin command */
struct backcmd { /* result of evalbackcmd */
int fd; /* file descriptor to read from */
char *buf; /* buffer */
int nleft; /* number of chars in buffer */
struct job *jp; /* job structure for command */
};
static int evalcmd __P((int, char **));
static void evalstring __P((char *, int));
static void evaltree __P((union node *, int));
static void evalbackcmd __P((union node *, struct backcmd *));
static int bltincmd __P((int, char **));
static int breakcmd __P((int, char **));
static int returncmd __P((int, char **));
static int execcmd __P((int, char **));
/* in_function returns nonzero if we are currently evaluating a function */
#define in_function() funcnest
extern int funcnest;
extern int evalskip;
/* reasons for skipping commands (see comment on breakcmd routine) */
#define SKIPBREAK 1
#define SKIPCONT 2
#define SKIPFUNC 3
#define SKIPFILE 4
/* $NetBSD: exec.h,v 1.17 2000/05/22 10:18:47 elric Exp $ */
/* values of cmdtype */
#define CMDUNKNOWN -1 /* no entry in table for command */
#define CMDNORMAL 0 /* command is an executable program */
#define CMDBUILTIN 1 /* command is a shell builtin */
#define CMDFUNCTION 2 /* command is a shell function */
struct cmdentry {
int cmdtype;
union param {
int index;
union node *func;
const struct builtincmd *cmd;
} u;
};
#define DO_ERR 1 /* find_command prints errors */
#define DO_ABS 2 /* find_command checks absolute paths */
#define DO_NOFUN 4 /* find_command ignores functions */
#define DO_BRUTE 8 /* find_command ignores hash table */
extern const char *pathopt; /* set by padvance */
extern int exerrno; /* last exec error */
static void shellexec __P((char **, char **, const char *, int))
__attribute__((noreturn));
static char *padvance __P((const char **, const char *));
static int hashcmd __P((int, char **));
static void find_command __P((char *, struct cmdentry *, int, const char *));
struct builtincmd *find_builtin __P((char *));
static void hashcd __P((void));
static void changepath __P((const char *));
static void deletefuncs __P((void));
#ifdef notdef
static void getcmdentry __P((char *, struct cmdentry *));
#endif
static void addcmdentry __P((char *, struct cmdentry *));
static void defun __P((char *, union node *));
static void unsetfunc __P((char *));
#ifdef ASH_TYPE
static int typecmd __P((int, char **));
#endif
static int commandcmd __P((int, char **));
/* $NetBSD: expand.h,v 1.12 1999/07/09 03:05:50 christos Exp $ */
struct strlist {
struct strlist *next;
char *text;
};
struct arglist {
struct strlist *list;
struct strlist **lastp;
};
/*
* expandarg() flags
*/
#define EXP_FULL 0x1 /* perform word splitting & file globbing */
#define EXP_TILDE 0x2 /* do normal tilde expansion */
#define EXP_VARTILDE 0x4 /* expand tildes in an assignment */
#define EXP_REDIR 0x8 /* file glob for a redirection (1 match only) */
#define EXP_CASE 0x10 /* keeps quotes around for CASE pattern */
#define EXP_RECORD 0x20 /* need to record arguments for ifs breakup */
static void expandhere __P((union node *, int));
static void expandarg __P((union node *, struct arglist *, int));
#ifdef ASH_MATH_SUPPORT
static void expari __P((int));
#endif
#if !(defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN))
static int patmatch __P((char *, char *, int));
#endif
#if defined(__GLIBC__) && !defined(FNMATCH_BROKEN)
#define rmescapes(p) _rmescapes((p), 0)
static char *_rmescapes __P((char *, int));
#else
static void rmescapes __P((char *));
#endif
static int casematch __P((union node *, char *));
#ifdef ASH_MATH_SUPPORT
/* From arith.y */
static int arith __P((const char *));
static int expcmd __P((int , char **));
static void arith_lex_reset __P((void));
static int yylex __P((void));
#endif
/* $NetBSD: init.h,v 1.8 1995/05/11 21:29:14 christos Exp $ */
static void init __P((void));
static void reset __P((void));
static void initshellproc __P((void));
/* $NetBSD: input.h,v 1.12 2000/05/22 10:18:47 elric Exp $ */
/* PEOF (the end of file marker) is defined in syntax.h */
/*
* The input line number. Input.c just defines this variable, and saves
* and restores it when files are pushed and popped. The user of this
* package must set its value.
*/
extern int plinno;
extern int parsenleft; /* number of characters left in input buffer */
extern char *parsenextc; /* next character in input buffer */
static char *pfgets __P((char *, int));
static int pgetc __P((void));
static int pgetc2 __P((void));
static int preadbuffer __P((void));
static void pungetc __P((void));
static void pushstring __P((char *, int, void *));
static void popstring __P((void));
static void setinputfile __P((const char *, int));
static void setinputfd __P((int, int));
static void setinputstring __P((char *));
static void popfile __P((void));
static void popallfiles __P((void));
static void closescript __P((void));
#define pgetc_macro() (--parsenleft >= 0? *parsenextc++ : preadbuffer())
/* $NetBSD: jobs.h,v 1.12 2000/05/22 10:18:47 elric Exp $ */
/* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
#define FORK_FG 0
#define FORK_BG 1
#define FORK_NOJOB 2
/*
* A job structure contains information about a job. A job is either a
* single process or a set of processes contained in a pipeline. In the
* latter case, pidlist will be non-NULL, and will point to a -1 terminated
* array of pids.
*/
struct procstat {
pid_t pid; /* process id */
int status; /* status flags (defined above) */
char *cmd; /* text of command being run */
};
/* states */
#define JOBSTOPPED 1 /* all procs are stopped */
#define JOBDONE 2 /* all procs are completed */
struct job {
struct procstat ps0; /* status of process */
struct procstat *ps; /* status or processes when more than one */
short nprocs; /* number of processes */
short pgrp; /* process group of this job */
char state; /* true if job is finished */
char used; /* true if this entry is in used */
char changed; /* true if status has changed */
#if JOBS
char jobctl; /* job running under job control */
#endif
};
extern short backgndpid; /* pid of last background process */
extern int job_warning; /* user was warned about stopped jobs */
static void setjobctl __P((int));
static int killcmd __P((int, char **));
static int fgcmd __P((int, char **));
static int bgcmd __P((int, char **));
static int jobscmd __P((int, char **));
static void showjobs __P((int));
static int waitcmd __P((int, char **));
struct job *makejob __P((union node *, int));
static int forkshell __P((struct job *, union node *, int));
static int waitforjob __P((struct job *));
static int stoppedjobs __P((void));
static char *commandtext __P((union node *));
#if ! JOBS
#define setjobctl(on) /* do nothing */
#endif
/* $NetBSD: machdep.h,v 1.8 1995/05/11 21:29:21 christos Exp $ */
/*
* Most machines require the value returned from malloc to be aligned
* in some way. The following macro will get this right on many machines.
*/
#ifndef ALIGN
union align {
int i;
char *cp;
};
#define ALIGN(nbytes) (((nbytes) + sizeof(union align) - 1) & ~(sizeof(union align) - 1))
#endif
/* $NetBSD: mail.h,v 1.8 1995/05/11 21:29:23 christos Exp $ */
static void chkmail __P((int));
/* $NetBSD: main.h,v 1.8 1995/05/11 21:29:27 christos Exp $ */
extern int rootpid; /* pid of main shell */
extern int rootshell; /* true if we aren't a child of the main shell */
static void readcmdfile __P((char *));
static void cmdloop __P((int));
static int dotcmd __P((int, char **));
static int exitcmd __P((int, char **));
/* $NetBSD: memalloc.h,v 1.11 2000/11/01 19:56:01 christos Exp $ */
struct stackmark {
struct stack_block *stackp;
char *stacknxt;
int stacknleft;
struct stackmark *marknext;
};
extern char *stacknxt;
extern int stacknleft;
extern int sstrnleft;
extern int herefd;
static inline pointer ckmalloc (int sz) { return xmalloc(sz); }
static inline pointer ckrealloc(void *p, int sz) { return xrealloc(p, sz); }
static inline char * savestr (const char *s) { return xstrdup(s); }
pointer stalloc __P((int));
static void stunalloc __P((pointer));
static void setstackmark __P((struct stackmark *));
static void popstackmark __P((struct stackmark *));
static void growstackblock __P((void));
static void grabstackblock __P((int));
static char *growstackstr __P((void));
static char *makestrspace __P((size_t));
static void ungrabstackstr __P((char *, char *));
#define stackblock() stacknxt
#define stackblocksize() stacknleft
#define STARTSTACKSTR(p) p = stackblock(), sstrnleft = stackblocksize()
#define STPUTC(c, p) (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
#define CHECKSTRSPACE(n, p) { if (sstrnleft < n) p = makestrspace(n); }
#define USTPUTC(c, p) (--sstrnleft, *p++ = (c))
#define STACKSTRNUL(p) (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
#define STUNPUTC(p) (++sstrnleft, --p)
#define STTOPC(p) p[-1]
#define STADJUST(amount, p) (p += (amount), sstrnleft -= (amount))
#define grabstackstr(p) stalloc(stackblocksize() - sstrnleft)
#define ckfree(p) free((pointer)(p))
/* $NetBSD: miscbltin.h,v 1.1 1997/07/04 21:02:10 christos Exp $ */
static int readcmd __P((int, char **));
static int umaskcmd __P((int, char **));
static int ulimitcmd __P((int, char **));
/* $NetBSD: mystring.h,v 1.9 1995/05/11 21:29:42 christos Exp $ */
extern const char snlfmt[];
extern const char spcstr[];
#if 0
static void scopyn __P((const char *, char *, int));
#endif
static int prefix __P((const char *, const char *));
static int number __P((const char *));
static int is_number __P((const char *));
static char *single_quote __P((const char *));
static char *sstrdup __P((const char *));
static int pstrcmp __P((const void *, const void *));
static const char *const *findstring __P((const char *, const char *const *, size_t));
#define equal(s1, s2) (strcmp(s1, s2) == 0)
#define scopy(s1, s2) ((void)strcpy(s2, s1))
/* $NetBSD: options.h,v 1.14 2001/02/04 19:52:06 christos Exp $ */
struct shparam {
int nparam; /* # of positional parameters (without $0) */
unsigned char malloc; /* if parameter list dynamically allocated */
char **p; /* parameter list */
int optind; /* next parameter to be processed by getopts */
int optoff; /* used by getopts */
};
#define eflag optlist[0].val
#define fflag optlist[1].val
#define Iflag optlist[2].val
#define iflag optlist[3].val
#define mflag optlist[4].val
#define nflag optlist[5].val
#define sflag optlist[6].val
#define xflag optlist[7].val
#define vflag optlist[8].val
#define Vflag optlist[9].val
#define Eflag optlist[10].val
#define Cflag optlist[11].val
#define aflag optlist[12].val
#define bflag optlist[13].val
#define uflag optlist[14].val
#define qflag optlist[15].val
#define NOPTS 16
struct optent {
const char *name;
const char letter;
char val;
};
extern struct optent optlist[NOPTS];
extern char *minusc; /* argument to -c option */
extern char *arg0; /* $0 */
extern struct shparam shellparam; /* $@ */
extern char **argptr; /* argument list for builtin commands */
extern char *optionarg; /* set by nextopt */
extern char *optptr; /* used by nextopt */
static void procargs __P((int, char **));
static void optschanged __P((void));
static void setparam __P((char **));
static void freeparam __P((volatile struct shparam *));
static int shiftcmd __P((int, char **));
static int setcmd __P((int, char **));
#ifdef ASH_GETOPTS
static int getoptscmd __P((int, char **));
static int setvarsafe __P((const char *, const char *, int));
#endif
static int nextopt __P((const char *));
static void getoptsreset __P((const char *));
/* $NetBSD: output.h,v 1.14 1998/01/31 12:37:55 christos Exp $ */
struct output {
#ifdef USE_GLIBC_STDIO
FILE *stream;
#endif
char *nextc;
int nleft;
char *buf;
int bufsize;
int fd;
short flags;
};
extern struct output output;
extern struct output errout;
extern struct output memout;
extern struct output *out1;
extern struct output *out2;
static void outstr __P((const char *, struct output *));
#ifndef USE_GLIBC_STDIO
static void outcslow __P((char, struct output *));
#endif
static void flushall __P((void));
static void flushout __P((struct output *));
static void freestdout __P((void));
static void outfmt __P((struct output *, const char *, ...))
__attribute__((__format__(__printf__,2,3)));
static void out1fmt __P((const char *, ...))
__attribute__((__format__(__printf__,1,2)));
static void fmtstr __P((char *, size_t, const char *, ...))
__attribute__((__format__(__printf__,3,4)));
#ifndef USE_GLIBC_STDIO
static void doformat __P((struct output *, const char *, va_list));
#endif
static int xwrite __P((int, const char *, int));
#ifdef USE_GLIBC_STDIO
static void initstreams __P((void));
static void openmemout __P((void));
static int __closememout __P((void));
#endif
#define OUTPUT_ERR 01 /* error occurred on output */
#ifdef USE_GLIBC_STDIO
#define outc(c, o) putc((c), (o)->stream)
#define doformat(d, f, a) vfprintf((d)->stream, (f), (a))
#else
#define outc(c, file) (--(file)->nleft < 0? outcslow((c), (file)) : (*(file)->nextc = (c), (file)->nextc++))
#endif
#define out1c(c) outc((c), out1)
#define out2c(c) outc((c), out2)
#define out1str(s) outstr((s), out1)
#define out2str(s) outstr((s), out2)
#define outerr(f) ((f)->flags & OUTPUT_ERR)
/* $NetBSD: parser.h,v 1.14 2000/07/27 04:09:28 cgd Exp $ */
/* control characters in argument strings */
#define CTLESC '\201'
#define CTLVAR '\202'
#define CTLENDVAR '\203'
#define CTLBACKQ '\204'
#define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */
/* CTLBACKQ | CTLQUOTE == '\205' */
#define CTLARI '\206'
#define CTLENDARI '\207'
#define CTLQUOTEMARK '\210'
/* variable substitution byte (follows CTLVAR) */
#define VSTYPE 0x0f /* type of variable substitution */
#define VSNUL 0x10 /* colon--treat the empty string as unset */
#define VSQUOTE 0x80 /* inside double quotes--suppress splitting */
/* values of VSTYPE field */
#define VSNORMAL 0x1 /* normal variable: $var or ${var} */
#define VSMINUS 0x2 /* ${var-text} */
#define VSPLUS 0x3 /* ${var+text} */
#define VSQUESTION 0x4 /* ${var?message} */
#define VSASSIGN 0x5 /* ${var=text} */
#define VSTRIMLEFT 0x6 /* ${var#pattern} */
#define VSTRIMLEFTMAX 0x7 /* ${var##pattern} */
#define VSTRIMRIGHT 0x8 /* ${var%pattern} */
#define VSTRIMRIGHTMAX 0x9 /* ${var%%pattern} */
#define VSLENGTH 0xa /* ${#var} */
/*
* NEOF is returned by parsecmd when it encounters an end of file. It
* must be distinct from NULL, so we use the address of a variable that
* happens to be handy.
*/
extern int tokpushback;
#define NEOF ((union node *)&tokpushback)
extern int whichprompt; /* 1 == PS1, 2 == PS2 */
extern int checkalias;
union node *parsecmd(int);
static void fixredir(union node *, const char *, int);
static int goodname(char *);
static const char *getprompt(void *);
static int isassignment __P((const char *));
static const char *const *findkwd __P((const char *));
/* $NetBSD: redir.h,v 1.12 2000/05/22 10:18:47 elric Exp $ */
/* flags passed to redirect */
#define REDIR_PUSH 01 /* save previous values of file descriptors */
#define REDIR_BACKQ 02 /* save the command output in memory */
extern int fileno2;
static void redirect __P((union node *, int));
static void popredir __P((void));
static int fd0_redirected_p __P((void));
static void clearredir __P((void));
static int dup_as_newfd __P((int, int));
/* $NetBSD: show.h,v 1.4 1999/10/08 21:10:44 pk Exp $ */
#ifdef DEBUG
static void trace __P((const char *, ...));
static void trargs __P((char **));
static void showtree __P((union node *));
static void trputc __P((int));
static void trputs __P((const char *));
static void opentrace __P((void));
#endif
/*
* This file was generated by the mksyntax program.
*/
#ifdef CEOF
#undef CEOF
#endif
/* Syntax classes */
#define CWORD 0 /* character is nothing special */
#define CNL 1 /* newline character */
#define CBACK 2 /* a backslash character */
#define CSQUOTE 3 /* single quote */
#define CDQUOTE 4 /* double quote */
#define CENDQUOTE 5 /* a terminating quote */
#define CBQUOTE 6 /* backwards single quote */
#define CVAR 7 /* a dollar sign */
#define CENDVAR 8 /* a '}' character */
#define CLP 9 /* a left paren in arithmetic */
#define CRP 10 /* a right paren in arithmetic */
#define CEOF 11 /* end of file */
#define CCTL 12 /* like CWORD, except it must be escaped */
#define CSPCL 13 /* these terminate a word */
#define CIGN 14 /* character should be ignored */
/* Syntax classes for is_ functions */
#define ISDIGIT 01 /* a digit */
#define ISUPPER 02 /* an upper case letter */
#define ISLOWER 04 /* a lower case letter */
#define ISUNDER 010 /* an underscore */
#define ISSPECL 020 /* the name of a special parameter */
#define SYNBASE 130
#define PEOF -130
#define PEOA -129
#define BASESYNTAX (basesyntax + SYNBASE)
#define DQSYNTAX (dqsyntax + SYNBASE)
#define SQSYNTAX (sqsyntax + SYNBASE)
#define ARISYNTAX (arisyntax + SYNBASE)
#define is_digit(c) ((unsigned)((c) - '0') <= 9)
#define is_alpha(c) (((c) < CTLESC || (c) > CTLENDARI) && isalpha((unsigned char) (c)))
#define is_name(c) (((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalpha((unsigned char) (c))))
#define is_in_name(c) (((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalnum((unsigned char) (c))))
#define is_special(c) ((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))
#define digit_val(c) ((c) - '0')
extern const char basesyntax[];
extern const char dqsyntax[];
extern const char sqsyntax[];
extern const char arisyntax[];
extern const char is_type[];
#define TEOF 0
#define TNL 1
#define TSEMI 2
#define TBACKGND 3
#define TAND 4
#define TOR 5
#define TPIPE 6
#define TLP 7
#define TRP 8
#define TENDCASE 9
#define TENDBQUOTE 10
#define TREDIR 11
#define TWORD 12
#define TASSIGN 13
#define TNOT 14
#define TCASE 15
#define TDO 16
#define TDONE 17
#define TELIF 18
#define TELSE 19
#define TESAC 20
#define TFI 21
#define TFOR 22
#define TIF 23
#define TIN 24
#define TTHEN 25
#define TUNTIL 26
#define TWHILE 27
#define TBEGIN 28
#define TEND 29
/* Array indicating which tokens mark the end of a list */
static const char tokendlist[] = {
1,
0,
0,
0,
0,
0,
0,
0,
1,
1,
1,
0,
0,
0,
0,
0,
1,
1,
1,
1,
1,
1,
0,
0,
0,
1,
0,
0,
0,
1,
};
static const char *const tokname[] = {
"end of file",
"newline",
"\";\"",
"\"&\"",
"\"&&\"",
"\"||\"",
"\"|\"",
"\"(\"",
"\")\"",
"\";;\"",
"\"`\"",
"redirection",
"word",
"assignment",
"\"!\"",
"\"case\"",
"\"do\"",
"\"done\"",
"\"elif\"",
"\"else\"",
"\"esac\"",
"\"fi\"",
"\"for\"",
"\"if\"",
"\"in\"",
"\"then\"",
"\"until\"",
"\"while\"",
"\"{\"",
"\"}\"",
};
#define KWDOFFSET 14
static const char *const parsekwd[] = {
"!",
"case",
"do",
"done",
"elif",
"else",
"esac",
"fi",
"for",
"if",
"in",
"then",
"until",
"while",
"{",
"}"
};
/* $NetBSD: trap.h,v 1.14 2000/05/22 10:18:47 elric Exp $ */
extern int pendingsigs;
static int trapcmd __P((int, char **));
static void clear_traps __P((void));
static void setsignal __P((int));
static void ignoresig __P((int));
static void onsig __P((int));
static void dotrap __P((void));
static void setinteractive __P((int));
static void exitshell __P((int)) __attribute__((noreturn));
static int decode_signal __P((const char *, int));
/* $NetBSD: var.h,v 1.18 2000/05/22 10:18:47 elric Exp $ */
/*
* Shell variables.
*/
/* flags */
#define VEXPORT 0x01 /* variable is exported */
#define VREADONLY 0x02 /* variable cannot be modified */
#define VSTRFIXED 0x04 /* variable struct is staticly allocated */
#define VTEXTFIXED 0x08 /* text is staticly allocated */
#define VSTACK 0x10 /* text is allocated on the stack */
#define VUNSET 0x20 /* the variable is not set */
#define VNOFUNC 0x40 /* don't call the callback function */
struct var {
struct var *next; /* next entry in hash list */
int flags; /* flags are defined above */
char *text; /* name=value */
void (*func) __P((const char *));
/* function to be called when */
/* the variable gets set/unset */
};
struct localvar {
struct localvar *next; /* next local variable in list */
struct var *vp; /* the variable that was made local */
int flags; /* saved flags */
char *text; /* saved text */
};
extern struct localvar *localvars;
#if ATTY
extern struct var vatty;
#endif
extern struct var vifs;
extern struct var vmail;
extern struct var vmpath;
extern struct var vpath;
extern struct var vps1;
extern struct var vps2;
#ifndef SMALL
extern struct var vterm;
extern struct var vtermcap;
extern struct var vhistsize;
#endif
#ifdef IFS_BROKEN
extern const char defifsvar[];
#define defifs (defifsvar + 4)
#else
extern const char defifs[];
#endif
extern const char defpathvar[];
#define defpath (defpathvar + 5)
/*
* The following macros access the values of the above variables.
* They have to skip over the name. They return the null string
* for unset variables.
*/
#define ifsval() (vifs.text + 4)
#define ifsset() ((vifs.flags & VUNSET) == 0)
#define mailval() (vmail.text + 5)
#define mpathval() (vmpath.text + 9)
#define pathval() (vpath.text + 5)
#define ps1val() (vps1.text + 4)
#define ps2val() (vps2.text + 4)
#define optindval() (voptind.text + 7)
#ifndef SMALL
#define histsizeval() (vhistsize.text + 9)
#define termval() (vterm.text + 5)
#endif
#if ATTY
#define attyset() ((vatty.flags & VUNSET) == 0)
#endif
#define mpathset() ((vmpath.flags & VUNSET) == 0)
static void initvar __P((void));
static void setvar __P((const char *, const char *, int));
static void setvareq __P((char *, int));
struct strlist;
static void listsetvar __P((struct strlist *));
static char *lookupvar __P((const char *));
static char *bltinlookup __P((const char *));
static char **environment __P((void));
static void shprocvar __P((void));
static int showvarscmd __P((int, char **));
static int exportcmd __P((int, char **));
static int localcmd __P((int, char **));
static void mklocal __P((char *));
static void poplocalvars __P((void));
static int setvarcmd __P((int, char **));
static int unsetcmd __P((int, char **));
static int unsetvar __P((const char *));
static int varequal __P((const char *, const char *));
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