This is sh.h in view mode; [Download] [Up]
/* $Header: /u/christos/src/tcsh-6.06/RCS/sh.h,v 3.68 1995/04/16 19:15:53 christos Exp $ */
/*
* sh.h: Catch it all globals and includes file!
*/
/*-
* Copyright (c) 1980, 1991 The Regents of the University of California.
* All rights reserved.
*
* 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.
*/
#ifndef _h_sh
#define _h_sh
#include "config.h"
#ifndef EXTERN
# define EXTERN extern
#endif /* EXTERN */
/*
* Sanity
*/
#if defined(_POSIX_SOURCE) && !defined(POSIX)
# define POSIX
#endif
#if defined(POSIXJOBS) && !defined(BSDJOBS)
# define BSDJOBS
#endif
#if defined(POSIXSIGS) && !defined(BSDSIGS)
# define BSDSIGS
#endif
#ifdef SHORT_STRINGS
typedef short Char;
# define SAVE(a) (Strsave(str2short(a)))
#else
typedef char Char;
# define SAVE(a) (strsave(a))
#endif
/* Elide unused argument warnings */
#define USE(a) (void) (a)
/*
* If your compiler complains, then you can either
* throw it away and get gcc or, use the following define
* and get rid of the typedef.
* [The 4.2/3BSD vax compiler does not like that]
* Both MULTIFLOW and PCC compilers exhbit this bug. -- sterling@netcom.com
*/
#ifdef SIGVOID
# if (defined(vax) || defined(uts) || defined(MULTIFLOW) || defined(PCC)) && !defined(__GNUC__)
# define sigret_t void
# else /* !((vax || uts || MULTIFLOW || PCC) && !__GNUC__) */
typedef void sigret_t;
# endif /* (vax || uts || MULTIFLOW || PCC) && !__GNUC__ */
#else /* !SIGVOID */
typedef int sigret_t;
#endif /* SIGVOID */
/*
* Fundamental definitions which may vary from system to system.
*
* BUFSIZE The i/o buffering size; also limits word size
* MAILINTVL How often to mailcheck; more often is more expensive
*/
#ifdef BUFSIZE
# if BUFSIZE < 1024
# undef BUFSIZE
# define BUFSIZE 1024 /* buffer size should be no less than this */
# endif
#else
# define BUFSIZE 1024
#endif /* BUFSIZE */
#define FORKSLEEP 10 /* delay loop on non-interactive fork failure */
#define MAILINTVL 600 /* 10 minutes */
#ifndef INBUFSIZE
# define INBUFSIZE 2*BUFSIZE /* Num input characters on the command line */
#endif /* INBUFSIZE */
/*
* What our builtin echo looks like
*/
#define NONE_ECHO 0
#define BSD_ECHO 1
#define SYSV_ECHO 2
#define BOTH_ECHO (BSD_ECHO|SYSV_ECHO)
#ifndef ECHO_STYLE
# if SYSVREL > 0
# define ECHO_STYLE SYSV_ECHO
# else /* SYSVREL == 0 */
# define ECHO_STYLE BSD_ECHO
# endif /* SYSVREL */
#endif /* ECHO_STYLE */
/*
* The shell moves std in/out/diag and the old std input away from units
* 0, 1, and 2 so that it is easy to set up these standards for invoked
* commands.
*/
#define FSHTTY 15 /* /dev/tty when manip pgrps */
#define FSHIN 16 /* Preferred desc for shell input */
#define FSHOUT 17 /* ... shell output */
#define FSHDIAG 18 /* ... shell diagnostics */
#define FOLDSTD 19 /* ... old std input */
#ifdef PROF
#define xexit(n) done(n)
#endif
#ifdef cray
# define word word_t /* sys/types.h defines word.. bad move! */
#endif
#include <sys/types.h>
#ifdef cray
# undef word
#endif
/*
* Path separator in environment variables
*/
#ifndef PATHSEP
# ifdef __EMX__
# define PATHSEP ';'
# else /* unix */
# define PATHSEP ':'
# endif /* __EMX__ */
#endif /* !PATHSEP */
/*
* This macro compares the st_dev field of struct stat. On aix on ibmESA
* st_dev is a structure, so comparison does not work.
*/
#ifndef DEV_DEV_COMPARE
# define DEV_DEV_COMPARE(x,y) ((x) == (y))
#endif /* DEV_DEV_COMPARE */
#ifdef _SEQUENT_
# include <sys/procstats.h>
#endif /* _SEQUENT_ */
#if defined(POSIX) || SYSVREL > 0
# include <sys/times.h>
#endif /* POSIX || SYSVREL > 0 */
#ifdef NLS
# include <locale.h>
#endif /* NLS */
#if !defined(_MINIX) && !defined(_VMS_POSIX)
# include <sys/param.h>
#endif /* _MINIX && vmsposix atp */
#include <sys/stat.h>
#if defined(BSDTIMES) || defined(BSDLIMIT)
# include <sys/time.h>
# if SYSVREL>3 && !defined(sgi) && !defined(sun) && !(defined(__alpha) && defined(__osf__))
# include "/usr/ucbinclude/sys/resource.h"
# else
# include <sys/resource.h>
# endif /* SYSVREL>3 */
#endif /* BSDTIMES */
#ifndef POSIX
# ifdef TERMIO
# include <termio.h>
# else /* SGTTY */
# include <sgtty.h>
# endif /* TERMIO */
#else /* POSIX */
# include <termios.h>
# if SYSVREL > 3
# undef TIOCGLTC /* we don't need those, since POSIX has them */
# undef TIOCSLTC
# undef CSWTCH
# define CSWTCH _POSIX_VDISABLE /* So job control works */
# endif /* SYSVREL > 3 */
#endif /* POSIX */
#ifdef sonyrisc
# include <sys/ttold.h>
#endif /* sonyrisc */
#ifdef POSIX
/*
* We should be using setpgid and setpgid
* by now, but in some systems we use the
* old routines...
*/
# define getpgrp __getpgrp
# define setpgrp __setpgrp
# include <unistd.h>
# undef getpgrp
# undef setpgrp
extern pid_t getpgrp();
extern pid_t setpgrp();
/*
* the gcc+protoize version of <stdlib.h>
* redefines malloc(), so we define the following
* to avoid it.
*/
# ifdef linux
# define NO_FIX_MALLOC
# include <stdlib.h>
# else /* linux */
# define _GNU_STDLIB_H
# define malloc __malloc
# define free __free
# define calloc __calloc
# define realloc __realloc
# include <stdlib.h>
# undef malloc
# undef free
# undef calloc
# undef realloc
# endif /* linux */
# include <limits.h>
#endif /* POSIX */
#if SYSVREL > 0 || defined(_IBMR2) || defined(_MINIX)
# if !defined(pyr) && !defined(stellar)
# include <time.h>
# ifdef _MINIX
# define HZ CLOCKS_PER_SEC
# endif /* _MINIX */
# endif /* !pyr && !stellar */
#endif /* SYSVREL > 0 || _IBMR2 */
#if !((defined(SUNOS4) || defined(_MINIX) || defined(DECOSF1)) && defined(TERMIO))
# if !defined(COHERENT) && !defined(_VMS_POSIX)
# include <sys/ioctl.h>
# endif
#endif
#if (defined(__DGUX__) && defined(POSIX)) || defined(DGUX)
#undef CSWTCH
#define CSWTCH _POSIX_VDISABLE
#endif
#if (!defined(FIOCLEX) && defined(SUNOS4)) || ((SYSVREL == 4) && !defined(_SEQUENT_))
# include <sys/filio.h>
#endif /* (!FIOCLEX && SUNOS4) || (SYSVREL == 4 && !_SEQUENT_) */
#if !defined(_MINIX) && !defined(COHERENT) && !defined(supermax)
# include <sys/file.h>
#endif /* !_MINIX && !COHERENT && !supermax */
#if !defined(O_RDONLY) || !defined(O_NDELAY)
# include <fcntl.h>
#endif
#include <errno.h>
#include <setjmp.h>
#if __STDC__ || defined(FUNCPROTO)
# include <stdarg.h>
#else
#ifdef _MINIX
# include "mi.varargs.h"
#else
# include <varargs.h>
#endif /* _MINIX */
#endif
#ifdef DIRENT
# include <dirent.h>
#else
# ifdef hp9000s500
# include <ndir.h>
# else
# include <sys/dir.h>
# endif
# define dirent direct
#endif /* DIRENT */
#if defined(hpux) || defined(sgi) || defined(OREO) || defined(COHERENT)
# include <stdio.h> /* So the fgetpwent() prototypes work */
#endif /* hpux || sgi || OREO || COHERENT */
#include <pwd.h>
#include <grp.h>
#ifdef PW_SHADOW
# include <shadow.h>
#endif /* PW_SHADOW */
#ifdef PW_AUTH
# include <auth.h>
#endif /* PW_AUTH */
#ifdef BSD
# include <strings.h>
# define strchr(a, b) index(a, b)
# define strrchr(a, b) rindex(a, b)
#else
# include <string.h>
#endif /* BSD */
/*
* IRIX-5.0 has <sys/cdefs.h>, but most system include files do not
* include it yet, so we include it here
*/
#if defined(sgi) && SYSVREL > 3
# include <sys/cdefs.h>
#endif /* sgi && SYSVREL > 3 */
/*
* ANSIisms... These must be *after* the system include and
* *before* our includes, so that BSDreno has time to define __P
*/
#undef __P
#ifndef __P
# if __STDC__ || defined(FUNCPROTO)
# ifndef FUNCPROTO
# define FUNCPROTO
# endif
# define __P(a) a
# else
# define __P(a) ()
# if !__STDC__
# define const
# ifndef apollo
# define volatile /* Apollo 'c' extensions need this */
# endif /* apollo */
# endif
# endif
#endif
#ifdef PURIFY
/* Re-define those, cause purify might use them */
# define xprintf printf
# define xsprintf sprintf
# define xvprintf vprintf
# define xvsprintf vsprintf
/* exit normally, allowing purify to trace leaks */
# define _exit exit
typedef int pret_t;
#else /* !PURIFY */
/*
* If your compiler complains, then you can either
* throw it away and get gcc or, use the following define
* and get rid of the typedef.
* [The 4.2/3BSD vax compiler does not like that]
* Both MULTIFLOW and PCC compilers exhbit this bug. -- sterling@netcom.com
*/
# if (defined(vax) || defined(uts) || defined(MULTIFLOW) || defined(PCC)) && !defined(__GNUC__)
# define pret_t void
# else /* !((vax || uts || MULTIFLOW || PCC) && !__GNUC__) */
typedef void pret_t;
# endif /* (vax || uts || MULTIFLOW || PCC) && !__GNUC__ */
#endif /* PURIFY */
typedef int bool;
#include "sh.types.h"
#ifndef lint
typedef ptr_t memalign_t;
#else
typedef union {
char am_char, *am_char_p;
short am_short, *am_short_p;
int am_int, *am_int_p;
long am_long, *am_long_p;
float am_float, *am_float_p;
double am_double, *am_double_p;
} *memalign_t;
# define malloc lint_malloc
# define free lint_free
# define realloc lint_realloc
# define calloc lint_calloc
#endif
#ifdef MDEBUG
extern memalign_t DebugMalloc __P((unsigned, char *, int));
extern memalign_t DebugRealloc __P((ptr_t, unsigned, char *, int));
extern memalign_t DebugCalloc __P((unsigned, unsigned, char *, int));
extern void DebugFree __P((ptr_t, char *, int));
# define xmalloc(i) DebugMalloc(i, __FILE__, __LINE__)
# define xrealloc(p, i)((p) ? DebugRealloc(p, i, __FILE__, __LINE__) : \
DebugMalloc(i, __FILE__, __LINE__))
# define xcalloc(n, s) DebugCalloc(n, s, __FILE__, __LINE__)
# define xfree(p) if (p) DebugFree(p, __FILE__, __LINE__)
#else
# ifdef SYSMALLOC
# define xmalloc(i) smalloc(i)
# define xrealloc(p, i) srealloc(p, i)
# define xcalloc(n, s) scalloc(n, s)
# define xfree(p) sfree(p)
# else
# define xmalloc(i) malloc(i)
# define xrealloc(p, i) realloc(p, i)
# define xcalloc(n, s) calloc(n, s)
# define xfree(p) free(p)
# endif /* SYSMALLOC */
#endif /* MDEBUG */
#include "sh.char.h"
#include "sh.err.h"
#include "sh.dir.h"
#include "sh.proc.h"
#include "pathnames.h"
/*
* C shell
*
* Bill Joy, UC Berkeley
* October, 1978; May 1980
*
* Jim Kulp, IIASA, Laxenburg Austria
* April, 1980
*/
#if !defined(MAXNAMLEN) && defined(_D_NAME_MAX)
# define MAXNAMLEN _D_NAME_MAX
#endif /* MAXNAMLEN */
#ifdef REMOTEHOST
# include <netdb.h>
#endif /* REMOTEHOST */
#ifndef MAXHOSTNAMELEN
# define MAXHOSTNAMELEN 255
#endif /* MAXHOSTNAMELEN */
#define eq(a, b) (Strcmp(a, b) == 0)
/* globone() flags */
#define G_ERROR 0 /* default action: error if multiple words */
#define G_IGNORE 1 /* ignore the rest of the words */
#define G_APPEND 2 /* make a sentence by cat'ing the words */
/*
* Global flags
*/
EXTERN bool chkstop; /* Warned of stopped jobs... allow exit */
#if (defined(FIOCLEX) && defined(FIONCLEX)) || defined(F_SETFD)
# define CLOSE_ON_EXEC
#else
EXTERN bool didcch; /* Have closed unused fd's for child */
#endif /* (FIOCLEX && FIONCLEX) || F_SETFD */
EXTERN bool didfds; /* Have setup i/o fd's for child */
EXTERN bool doneinp; /* EOF indicator after reset from readc */
EXTERN bool exiterr; /* Exit if error or non-zero exit status */
EXTERN bool child; /* Child shell ... errors cause exit */
EXTERN bool haderr; /* Reset was because of an error */
EXTERN bool intty; /* Input is a tty */
EXTERN bool intact; /* We are interactive... therefore prompt */
EXTERN bool justpr; /* Just print because of :p hist mod */
EXTERN bool loginsh; /* We are a loginsh -> .login/.logout */
EXTERN bool neednote; /* Need to pnotify() */
EXTERN bool noexec; /* Don't execute, just syntax check */
EXTERN bool pjobs; /* want to print jobs if interrupted */
EXTERN bool setintr; /* Set interrupts on/off -> Wait intr... */
EXTERN bool timflg; /* Time the next waited for command */
EXTERN bool havhash; /* path hashing is available */
EXTERN bool editing; /* doing filename expansion and line editing */
EXTERN bool bslash_quote; /* PWP: tcsh-style quoting? (in sh.c) */
EXTERN bool isoutatty; /* is SHOUT a tty */
EXTERN bool isdiagatty; /* is SHDIAG a tty */
EXTERN bool is1atty; /* is file descriptor 1 a tty (didfds mode) */
EXTERN bool is2atty; /* is file descriptor 2 a tty (didfds mode) */
EXTERN bool arun; /* Currently running multi-line-aliases */
EXTERN bool inheredoc; /* Currently parsing a heredoc */
/*
* Global i/o info
*/
EXTERN Char *arginp; /* Argument input for sh -c and internal `xx` */
EXTERN int onelflg; /* 2 -> need line for -t, 1 -> exit on read */
extern Char *ffile; /* Name of shell file for $0 */
extern bool dolzero; /* if $?0 should return true... */
extern char *seterr; /* Error message from scanner/parser */
extern int errno; /* Error from C library routines */
EXTERN Char *shtemp; /* Temp name for << shell files in /tmp */
#ifdef BSDTIMES
EXTERN struct timeval time0; /* Time at which the shell started */
EXTERN struct rusage ru0;
#else
# ifdef _SEQUENT_
EXTERN timeval_t time0; /* time at which shell started */
EXTERN struct process_stats ru0;
# else /* _SEQUENT_ */
# ifndef POSIX
EXTERN time_t time0; /* time at which shell started */
# else /* POSIX */
EXTERN clock_t time0; /* time at which shell started */
EXTERN clock_t clk_tck;
# endif /* POSIX */
EXTERN struct tms shtimes; /* shell and child times for process timing */
# endif /* _SEQUENT_ */
#endif /* BSDTIMES */
#ifndef HZ
# define HZ 100 /* for division into seconds */
#endif
/*
* Miscellany
*/
EXTERN Char *doldol; /* Character pid for $$ */
EXTERN int backpid; /* pid of the last background job */
/*
* Ideally these should be uid_t, gid_t, pid_t. I cannot do that right now
* cause pid's could be unsigned and that would break our -1 flag, and
* uid_t and gid_t are not defined in all the systems so I would have to
* make special cases for them. In the future...
*/
EXTERN int uid, euid, /* Invokers real and effective */
gid, egid; /* User and group ids */
EXTERN int opgrp, /* Initial pgrp and tty pgrp */
shpgrp, /* Pgrp of shell */
tpgrp; /* Terminal process group */
/* If tpgrp is -1, leave tty alone! */
EXTERN Char PromptBuf[INBUFSIZE*2]; /* buffer for the actual printed prompt.
* this must be large enough to contain
* the input line and the prompt, in
* case a correction occured...
*/
/*
* To be able to redirect i/o for builtins easily, the shell moves the i/o
* descriptors it uses away from 0,1,2.
* Ideally these should be in units which are closed across exec's
* (this saves work) but for version 6, this is not usually possible.
* The desired initial values for these descriptors are defined in
* sh.local.h.
*/
EXTERN int SHIN; /* Current shell input (script) */
EXTERN int SHOUT; /* Shell output */
EXTERN int SHDIAG; /* Diagnostic output... shell errs go here */
EXTERN int OLDSTD; /* Old standard input (def for cmds) */
#if SYSVREL == 4 && defined(_UTS)
/*
* From: fadden@uts.amdahl.com (Andy McFadden)
* we need sigsetjmp for UTS4, but not UTS2.1
*/
# define SIGSETJMP
#endif
/*
* Error control
*
* Errors in scanning and parsing set up an error message to be printed
* at the end and complete. Other errors always cause a reset.
* Because of source commands and .cshrc we need nested error catches.
*/
#ifdef NO_STRUCT_ASSIGNMENT
# ifdef SIGSETJMP
typedef sigjmp_buf jmp_buf_t;
/* bugfix by Jak Kirman @ Brown U.: remove the (void) cast here, see sh.c */
# define setexit() sigsetjmp(reslab)
# define reset() siglongjmp(reslab, 1)
# else
typedef jmp_buf jmp_buf_t;
/* bugfix by Jak Kirman @ Brown U.: remove the (void) cast here, see sh.c */
# define setexit() setjmp(reslab)
# define reset() longjmp(reslab, 1)
# endif
# define getexit(a) (void) memmove((ptr_t)&(a), (ptr_t)&reslab, sizeof(reslab))
# define resexit(a) (void) memmove((ptr_t)&reslab, (ptr_t)&(a), sizeof(reslab))
# define cpybin(a, b) (void) memmove((ptr_t)&(a), (ptr_t)&(b), sizeof(Bin))
#else
# ifdef SIGSETJMP
typedef struct { sigjmp_buf j; } jmp_buf_t;
# define setexit() sigsetjmp(reslab.j)
# define reset() siglongjmp(reslab.j, 1)
# else
typedef struct { jmp_buf j; } jmp_buf_t;
# define setexit() setjmp(reslab.j)
# define reset() longjmp(reslab.j, 1)
# endif
# define getexit(a) (void) ((a) = reslab)
# define resexit(a) (void) (reslab = (a))
# define cpybin(a, b) (void) ((a) = (b))
#endif /* NO_STRUCT_ASSIGNMENT */
extern jmp_buf_t reslab;
EXTERN Char *gointr; /* Label for an onintr transfer */
extern sigret_t (*parintr) (); /* Parents interrupt catch */
extern sigret_t (*parterm) (); /* Parents terminate catch */
/*
* Lexical definitions.
*
* All lexical space is allocated dynamically.
* The eighth/sixteenth bit of characters is used to prevent recognition,
* and eventually stripped.
*/
#define META 0200
#define ASCII 0177
#ifdef SHORT_STRINGS
# define QUOTE ((Char) 0100000)/* 16nth char bit used for 'ing */
# define TRIM 0077777 /* Mask to strip quote bit */
# define UNDER 0040000 /* Underline flag */
# define BOLD 0020000 /* Bold flag */
# define STANDOUT 0010000 /* Standout flag */
# define LITERAL 0004000 /* Literal character flag */
# define ATTRIBUTES 0074000 /* The bits used for attributes */
# define CHAR 0000377 /* Mask to mask out the character */
#else
# define QUOTE ((Char) 0200) /* Eighth char bit used for 'ing */
# define TRIM 0177 /* Mask to strip quote bit */
# define UNDER 0000000 /* No extra bits to do both */
# define BOLD 0000000 /* Bold flag */
# define STANDOUT META /* Standout flag */
# define LITERAL 0000000 /* Literal character flag */
# define ATTRIBUTES 0200 /* The bits used for attributes */
# define CHAR 0000177 /* Mask to mask out the character */
#endif
EXTERN int AsciiOnly; /* If set only 7 bits expected in characters */
/*
* Each level of input has a buffered input structure.
* There are one or more blocks of buffered input for each level,
* exactly one if the input is seekable and tell is available.
* In other cases, the shell buffers enough blocks to keep all loops
* in the buffer.
*/
EXTERN struct Bin {
off_t Bfseekp; /* Seek pointer */
off_t Bfbobp; /* Seekp of beginning of buffers */
off_t Bfeobp; /* Seekp of end of buffers */
int Bfblocks; /* Number of buffer blocks */
Char **Bfbuf; /* The array of buffer blocks */
} B;
/*
* This structure allows us to seek inside aliases
*/
struct Ain {
int type;
#define I_SEEK -1 /* Invalid seek */
#define A_SEEK 0 /* Alias seek */
#define F_SEEK 1 /* File seek */
#define E_SEEK 2 /* Eval seek */
union {
off_t _f_seek;
Char* _c_seek;
} fc;
#define f_seek fc._f_seek
#define c_seek fc._c_seek
Char **a_seek;
} ;
extern int aret; /* Type of last char returned */
#define SEEKEQ(a, b) ((a)->type == (b)->type && \
(a)->f_seek == (b)->f_seek && \
(a)->a_seek == (b)->a_seek)
#define fseekp B.Bfseekp
#define fbobp B.Bfbobp
#define feobp B.Bfeobp
#define fblocks B.Bfblocks
#define fbuf B.Bfbuf
/*
* The shell finds commands in loops by reseeking the input
* For whiles, in particular, it reseeks to the beginning of the
* line the while was on; hence the while placement restrictions.
*/
EXTERN struct Ain lineloc;
EXTERN bool cantell; /* Is current source tellable ? */
/*
* Input lines are parsed into doubly linked circular
* lists of words of the following form.
*/
struct wordent {
Char *word;
struct wordent *prev;
struct wordent *next;
};
/*
* During word building, both in the initial lexical phase and
* when expanding $ variable substitutions, expansion by `!' and `$'
* must be inhibited when reading ahead in routines which are themselves
* processing `!' and `$' expansion or after characters such as `\' or in
* quotations. The following flags are passed to the getC routines
* telling them which of these substitutions are appropriate for the
* next character to be returned.
*/
#define DODOL 1
#define DOEXCL 2
#define DOALL DODOL|DOEXCL
/*
* Labuf implements a general buffer for lookahead during lexical operations.
* Text which is to be placed in the input stream can be stuck here.
* We stick parsed ahead $ constructs during initial input,
* process id's from `$$', and modified variable values (from qualifiers
* during expansion in sh.dol.c) here.
*/
EXTERN Char *lap;
/*
* Parser structure
*
* Each command is parsed to a tree of command structures and
* flags are set bottom up during this process, to be propagated down
* as needed during the semantics/exeuction pass (sh.sem.c).
*/
struct command {
unsigned char t_dtyp; /* Type of node */
#define NODE_COMMAND 1 /* t_dcom <t_dlef >t_drit */
#define NODE_PAREN 2 /* ( t_dspr ) <t_dlef >t_drit */
#define NODE_PIPE 3 /* t_dlef | t_drit */
#define NODE_LIST 4 /* t_dlef ; t_drit */
#define NODE_OR 5 /* t_dlef || t_drit */
#define NODE_AND 6 /* t_dlef && t_drit */
unsigned char t_nice; /* Nice value */
#ifdef apollo
unsigned char t_systype; /* System environment */
#endif
unsigned long t_dflg; /* Flags, e.g. F_AMPERSAND|... */
/* save these when re-doing */
#ifndef apollo
#define F_SAVE (F_NICE|F_TIME|F_NOHUP|F_HUP)
#else
#define F_SAVE (F_NICE|F_TIME|F_NOHUP||F_HUP|F_VER)
#endif
#define F_AMPERSAND (1<<0) /* executes in background */
#define F_APPEND (1<<1) /* output is redirected >> */
#define F_PIPEIN (1<<2) /* input is a pipe */
#define F_PIPEOUT (1<<3) /* output is a pipe */
#define F_NOFORK (1<<4) /* don't fork, last ()ized cmd */
#define F_NOINTERRUPT (1<<5) /* should be immune from intr's */
/* spare */
#define F_STDERR (1<<7) /* redirect unit 2 with unit 1 */
#define F_OVERWRITE (1<<8) /* output was ! */
#define F_READ (1<<9) /* input redirection is << */
#define F_REPEAT (1<<10) /* reexec aft if, repeat,... */
#define F_NICE (1<<11) /* t_nice is meaningful */
#define F_NOHUP (1<<12) /* nohup this command */
#define F_TIME (1<<13) /* time this command */
#define F_BACKQ (1<<14) /* command is in `` */
#define F_HUP (1<<15) /* hup this command */
#ifdef apollo
#define F_VER (1<<16) /* execute command under SYSTYPE */
#endif
union {
Char *T_dlef; /* Input redirect word */
struct command *T_dcar; /* Left part of list/pipe */
} L;
union {
Char *T_drit; /* Output redirect word */
struct command *T_dcdr; /* Right part of list/pipe */
} R;
#define t_dlef L.T_dlef
#define t_dcar L.T_dcar
#define t_drit R.T_drit
#define t_dcdr R.T_dcdr
Char **t_dcom; /* Command/argument vector */
struct command *t_dspr; /* Pointer to ()'d subtree */
};
/*
* The keywords for the parser
*/
#define TC_BREAK 0
#define TC_BRKSW 1
#define TC_CASE 2
#define TC_DEFAULT 3
#define TC_ELSE 4
#define TC_END 5
#define TC_ENDIF 6
#define TC_ENDSW 7
#define TC_EXIT 8
#define TC_FOREACH 9
#define TC_GOTO 10
#define TC_IF 11
#define TC_LABEL 12
#define TC_LET 13
#define TC_SET 14
#define TC_SWITCH 15
#define TC_TEST 16
#define TC_THEN 17
#define TC_WHILE 18
/*
* These are declared here because they want to be
* initialized in sh.init.c (to allow them to be made readonly)
*/
extern struct biltins {
char *bname;
#if defined(hpux) && defined(__STDC__) && !defined(__GNUC__)
/* Avoid hpux ansi mode spurious warnings */
void (*bfunct) ();
#else
void (*bfunct) __P((Char **, struct command *));
#endif /* hpux && __STDC__ && !__GNUC__ */
int minargs, maxargs;
} bfunc[];
extern int nbfunc;
extern struct srch {
char *s_name;
int s_value;
} srchn[];
extern int nsrchn;
/*
* Structure defining the existing while/foreach loops at this
* source level. Loops are implemented by seeking back in the
* input. For foreach (fe), the word list is attached here.
*/
EXTERN struct whyle {
struct Ain w_start; /* Point to restart loop */
struct Ain w_end; /* End of loop (0 if unknown) */
Char **w_fe, **w_fe0; /* Current/initial wordlist for fe */
Char *w_fename; /* Name for fe */
struct whyle *w_next; /* Next (more outer) loop */
} *whyles;
/*
* Variable structure
*
* Aliases and variables are stored in AVL balanced binary trees.
*/
EXTERN struct varent {
Char **vec; /* Array of words which is the value */
Char *v_name; /* Name of variable/alias */
int v_flags; /* Flags */
#define VAR_ALL -1
#define VAR_READONLY 1
#define VAR_READWRITE 2
struct varent *v_link[3]; /* The links, see below */
int v_bal; /* Balance factor */
} shvhed, aliases;
#define v_left v_link[0]
#define v_right v_link[1]
#define v_parent v_link[2]
#define adrof(v) adrof1(v, &shvhed)
#define varval(v) value1(v, &shvhed)
/*
* The following are for interfacing redo substitution in
* aliases to the lexical routines.
*/
EXTERN struct wordent *alhistp; /* Argument list (first) */
EXTERN struct wordent *alhistt; /* Node after last in arg list */
EXTERN Char **alvec, *alvecp; /* The (remnants of) alias vector */
/*
* Filename/command name expansion variables
*/
EXTERN int gflag; /* After tglob -> is globbing needed? */
#define MAXVARLEN 30 /* Maximum number of char in a variable name */
#ifndef MAXPATHLEN
# define MAXPATHLEN 2048
#endif /* MAXPATHLEN */
#ifndef MAXNAMLEN
# define MAXNAMLEN 512
#endif /* MAXNAMLEN */
#ifndef HAVENOLIMIT
/*
* resource limits
*/
extern struct limits {
int limconst;
char *limname;
int limdiv;
char *limscale;
} limits[];
#endif /* !HAVENOLIMIT */
/*
* Variables for filename expansion
*/
extern Char **gargv; /* Pointer to the (stack) arglist */
extern int gargc; /* Number args in gargv */
/*
* Variables for command expansion.
*/
extern Char **pargv; /* Pointer to the argv list space */
EXTERN Char *pargs; /* Pointer to start current word */
EXTERN long pnleft; /* Number of chars left in pargs */
EXTERN Char *pargcp; /* Current index into pargs */
/*
* History list
*
* Each history list entry contains an embedded wordlist
* from the scanner, a number for the event, and a reference count
* to aid in discarding old entries.
*
* Essentially "invisible" entries are put on the history list
* when history substitution includes modifiers, and thrown away
* at the next discarding since their event numbers are very negative.
*/
EXTERN struct Hist {
struct wordent Hlex;
int Hnum;
int Href;
time_t Htime;
Char *histline;
struct Hist *Hnext;
} Histlist;
EXTERN struct wordent paraml; /* Current lexical word list */
EXTERN int eventno; /* Next events number */
EXTERN int lastev; /* Last event reference (default) */
EXTERN Char HIST; /* history invocation character */
EXTERN Char HISTSUB; /* auto-substitute character */
EXTERN Char PRCH; /* Prompt symbol for regular users */
EXTERN Char PRCHROOT; /* Prompt symbol for root */
/*
* For operating systems with single case filenames (OS/2)
*/
#ifdef CASE_INSENSITIVE
# define samecase(x) (isupper((unsigned char)(x)) ? \
tolower((unsigned char)(x)) : (x))
#else
# define samecase(x) (x)
#endif /* CASE_INSENSITIVE */
/*
* strings.h:
*/
#ifndef SHORT_STRINGS
#define Strchr(a, b) strchr(a, b)
#define Strrchr(a, b) strrchr(a, b)
#define Strcat(a, b) strcat(a, b)
#define Strncat(a, b, c) strncat(a, b, c)
#define Strcpy(a, b) strcpy(a, b)
#define Strncpy(a, b, c) strncpy(a, b, c)
#define Strlen(a) strlen(a)
#define Strcmp(a, b) strcmp(a, b)
#define Strncmp(a, b, c) strncmp(a, b, c)
#define Strspl(a, b) strspl(a, b)
#define Strsave(a) strsave(a)
#define Strend(a) strend(a)
#define Strstr(a, b) strstr(a, b)
#define str2short(a) (a)
#define blk2short(a) saveblk(a)
#define short2blk(a) saveblk(a)
#define short2str(a) strip(a)
#else
#define Strchr(a, b) s_strchr(a, b)
#define Strrchr(a, b) s_strrchr(a, b)
#define Strcat(a, b) s_strcat(a, b)
#define Strncat(a, b, c) s_strncat(a, b, c)
#define Strcpy(a, b) s_strcpy(a, b)
#define Strncpy(a, b, c) s_strncpy(a, b, c)
#define Strlen(a) s_strlen(a)
#define Strcmp(a, b) s_strcmp(a, b)
#define Strncmp(a, b, c) s_strncmp(a, b, c)
#define Strspl(a, b) s_strspl(a, b)
#define Strsave(a) s_strsave(a)
#define Strend(a) s_strend(a)
#define Strstr(a, b) s_strstr(a, b)
#endif
/*
* setname is a macro to save space (see sh.err.c)
*/
EXTERN char *bname;
#define setname(a) (bname = (a))
#ifdef VFORK
EXTERN Char *Vsav;
EXTERN Char *Vdp;
EXTERN Char *Vexpath;
EXTERN char **Vt;
#endif /* VFORK */
EXTERN Char **evalvec;
EXTERN Char *evalp;
extern struct mesg {
char *iname; /* name from /usr/include */
char *pname; /* print name */
} mesg[];
/* word_chars is set by default to WORD_CHARS but can be overridden by
the worchars variable--if unset, reverts to WORD_CHARS */
EXTERN Char *word_chars;
#define WORD_CHARS "*?_-.[]~=" /* default chars besides alnums in words */
EXTERN Char *STR_SHELLPATH;
#ifdef _PATH_BSHELL
EXTERN Char *STR_BSHELL;
#endif
EXTERN Char *STR_WORD_CHARS;
EXTERN Char **STR_environ;
extern int dont_free; /* Tell free that we are in danger if we free */
extern Char *INVPTR;
extern Char **INVPPTR;
#include "tc.h"
#include "sh.decls.h"
/*
* To print system call errors...
*/
#ifndef linux
#ifdef NEEDstrerror
extern char *sys_errlist[];
#endif
extern int errno, sys_nerr;
#endif /* !linux */
#ifdef NLS_CATALOGS
# ifdef linux
# include <localeinfo.h>
# include <features.h>
# endif
# ifdef SUNOS4
/* Who stole my nl_types.h? :-(
* All this stuff is in the man pages, but nowhere else?
* This does not link right now...
*/
typedef void *nl_catd;
extern const char * catgets __P((nl_catd, int, int, const char *));
nl_catd catopen __P((const char *, int));
int catclose __P((nl_catd));
# else
# include <nl_types.h>
# endif
# ifndef MCLoadBySet
# define MCLoadBySet 0
# endif
EXTERN nl_catd catd;
# define CGETS(b, c, d) catgets(catd, b, c, d)
# define CSAVS(b, c, d) strsave(CGETS(b, c, d))
#else
# define CGETS(b, c, d) d
# define CSAVS(b, c, d) d
#endif
#endif /* _h_sh */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.