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freebsd-dev/contrib/tcsh/sh.h
Mark Peek 9ccc37e320 Update to tcsh 6.18.01.
2012-02-22 03:36:15 +00:00

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/* $Header: /p/tcsh/cvsroot/tcsh/sh.h,v 3.165 2011/04/14 18:25:25 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. 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"
#include <stddef.h>
#include <signal.h>
#ifdef HAVE_ICONV
# include <iconv.h>
#endif
#ifdef HAVE_STDINT_H
# include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
# include <inttypes.h>
#endif
#if !defined(HAVE_STDINT_H) && !defined(HAVE_INTTYPES_H) && !defined(WINNT_NATIVE)
typedef unsigned long intptr_t;
#endif
#ifndef EXTERN
# define EXTERN extern
#else /* !EXTERN */
# ifdef WINNT_NATIVE
# define IZERO = 0
# define IZERO_STRUCT = {0}
# endif /* WINNT_NATIVE */
#endif /* EXTERN */
#ifndef IZERO
# define IZERO
#endif /* IZERO */
#ifndef IZERO_STRUCT
# define IZERO_STRUCT
#endif /* IZERO_STRUCT */
#ifndef WINNT_NATIVE
# define INIT_ZERO
# define INIT_ZERO_STRUCT
# define force_read xread
#endif /*!WINNT_NATIVE */
#if defined(KANJI) && defined(WIDE_STRINGS) && defined(HAVE_NL_LANGINFO) && defined(CODESET)
#define AUTOSET_KANJI
#endif
/*
* Sanity
*/
#if defined(_POSIX_SOURCE) && !defined(POSIX)
# define POSIX
#endif
#if defined(POSIXJOBS) && !defined(BSDJOBS)
# define BSDJOBS
#endif
#define TMP_TEMPLATE ".XXXXXX"
#ifdef SHORT_STRINGS
# ifdef WIDE_STRINGS
#include <wchar.h>
# ifdef UTF16_STRINGS
typedef wint_t Char;
# else
typedef wchar_t Char;
#endif
typedef unsigned long uChar;
typedef wint_t eChar; /* Can contain any Char value or CHAR_ERR */
#define CHAR_ERR WEOF /* Pretty please, use bit 31... */
#define normal_mbtowc(PWC, S, N) rt_mbtowc(PWC, S, N)
#define reset_mbtowc() TCSH_IGNORE(mbtowc(NULL, NULL, 0))
# else
typedef short Char;
typedef unsigned short uChar;
typedef int eChar;
#define CHAR_ERR (-1)
#define normal_mbtowc(PWC, S, N) ((void)(N), *(PWC) = (unsigned char)*(S), 1)
#define reset_mbtowc() ((void)0)
# endif
# define SAVE(a) (Strsave(str2short(a)))
#else
typedef char Char;
typedef unsigned char uChar;
typedef int eChar;
#define CHAR_ERR (-1)
#define normal_mbtowc(PWC, S, N) ((void)(N), *(PWC) = (unsigned char)*(S), 1)
#define reset_mbtowc() ((void)0)
# define SAVE(a) (strsave(a))
#endif
#if !defined(__inline) && !defined(__GNUC__) && !defined(_MSC_VER)
#define __inline
#endif
/* Elide unused argument warnings */
#define USE(a) (void) (a)
#define TCSH_IGNORE(a) tcsh_ignore((intptr_t)a)
static __inline void tcsh_ignore(intptr_t a)
{
USE(a);
}
/*
* Return true if the path is absolute
*/
#if defined(WINNT_NATIVE)
# define ABSOLUTEP(p) ((p)[0] == '/' || \
(Isalpha((p)[0]) && (p)[1] == ':'))
#elif defined(__CYGWIN__)
# define ABSOLUTEP(p) ((p)[0] == '/' || \
(Isalpha((p)[0]) && (p)[1] == ':' && \
((p)[2] == '\0' || (p)[2] == '/')))
#else /* !WINNT_NATIVE && !__CYGWIN__ */
# define ABSOLUTEP(p) (*(p) == '/')
#endif /* WINNT_NATIVE || __CYGWIN__ */
/*
* 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 < 4096
# undef BUFSIZE
# define BUFSIZE 4096 /* buffer size should be no less than this */
# endif
#else
# define BUFSIZE 4096
#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 FSAFE 5 /* We keep the first 5 descriptors untouched */
#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
# if defined(__EMX__) || defined(WINNT_NATIVE)
# define PATHSEP ';'
# else /* unix */
# define PATHSEP ':'
# endif /* __EMX__ || WINNT_NATIVE */
#endif /* !PATHSEP */
#if defined(__HP_CXD_SPP) && !defined(__hpux)
# include <sys/cnx_stat.h>
# define stat stat64
# define fstat fstat64
# define lstat lstat64
#endif /* __HP_CXD_SPP && !__hpux */
#ifdef HAVE_LONG_LONG
typedef long long tcsh_number_t;
#else
typedef long tcsh_number_t;
#endif
/*
* 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) && !defined(WINNT_NATIVE)
# include <sys/times.h>
#endif /* (POSIX || SYSVREL > 0) && !WINNT_NATIVE */
#ifdef NLS
# include <locale.h>
#endif /* NLS */
#if !defined(_MINIX) && !defined(_VMS_POSIX) && !defined(WINNT_NATIVE) && !defined(__MVS__)
# include <sys/param.h>
#endif /* !_MINIX && !_VMS_POSIX && !WINNT_NATIVE && !__MVS__ */
#include <sys/stat.h>
#if defined(BSDTIMES) || defined(BSDLIMIT)
# include <sys/time.h>
# if SYSVREL>3 && !defined(SCO) && !defined(sgi) && !defined(SNI) && !defined(sun) && !(defined(__alpha) && defined(__osf__)) && !defined(_SX) && !defined(__MVS__)
# include "/usr/ucbinclude/sys/resource.h"
# else
# ifdef convex
# define sysrusage cvxrusage
# include <sys/sysinfo.h>
# else
# define sysrusage rusage
# include <sys/resource.h>
# endif /* convex */
# endif /* SYSVREL>3 */
#endif /* BSDTIMES */
#ifndef WINNT_NATIVE
# ifndef POSIX
# ifdef TERMIO
# include <termio.h>
# else /* SGTTY */
# include <sgtty.h>
# endif /* TERMIO */
# else /* POSIX */
# ifndef _UWIN
# include <termios.h>
# else
# include <termio.h>
# endif /* _UWIN */
# if SYSVREL > 3 || defined(__linux__)
# 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 */
#endif /* WINNT_NATIVE */
#ifdef sonyrisc
# include <sys/ttold.h>
#endif /* sonyrisc */
#if defined(POSIX) && !defined(WINNT_NATIVE)
# include <unistd.h>
/*
* the gcc+protoize version of <stdlib.h>
* redefines malloc(), so we define the following
* to avoid it.
*/
# if defined(SYSMALLOC) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__) || defined(sgi) || defined(_OSD_POSIX)
# define NO_FIX_MALLOC
# include <stdlib.h>
# else /* glibc */
# 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 /* glibc || sgi */
#endif /* POSIX && !WINNT_NATIVE */
#include <limits.h>
#if SYSVREL > 0 || defined(_IBMR2) || defined(_MINIX) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
# if !defined(pyr) && !defined(stellar)
# include <time.h>
# ifdef _MINIX
# define HZ CLOCKS_PER_SEC
# endif /* _MINIX */
# endif /* !pyr && !stellar */
#endif /* SYSVREL > 0 || _IBMR2 */
/* In the following ifdef the DECOSF1 has been commented so that later
* versions of DECOSF1 will get TIOCGWINSZ. This might break older versions...
*/
#if !((defined(SUNOS4) || defined(_MINIX) /* || defined(DECOSF1) */) && defined(TERMIO))
# if !defined(_VMS_POSIX) && !defined(WINNT_NATIVE)
# include <sys/ioctl.h>
# if SYSVREL > 3 || defined(__linux__)
# 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
#endif
#if (defined(__DGUX__) && defined(POSIX)) || defined(DGUX)
#undef CSWTCH
#define CSWTCH _POSIX_VDISABLE
#endif
#if (!defined(FIOCLEX) && defined(SUNOS4)) || ((SYSVREL == 4) && !defined(_SEQUENT_) && !defined(SCO) && !defined(_SX)) && !defined(__MVS__)
# include <sys/filio.h>
#endif /* (!FIOCLEX && SUNOS4) || (SYSVREL == 4 && !_SEQUENT_ && !SCO && !_SX ) */
#if !defined(_MINIX) && !defined(supermax) && !defined(WINNT_NATIVE) && !defined(IRIS4D)
# include <sys/file.h>
#endif /* !_MINIX && !supermax && !WINNT_NATIVE && !defined(IRIS4D) */
#if !defined(O_RDONLY) || !defined(O_NDELAY)
# include <fcntl.h>
#endif
#include <errno.h>
#include <setjmp.h>
#include <stdarg.h>
#ifdef HAVE_DIRENT_H
# include <dirent.h>
#else
# ifdef HAVE_NDIR_H
# include <ndir.h>
# else
# include <sys/dir.h>
# endif
# define dirent direct
#endif /* HAVE_DIRENT_H */
#ifndef HAVE_STRUCT_DIRENT_D_INO
# define d_ino d_fileno
#endif
#if defined(hpux) || defined(sgi) || defined(OREO)
# include <stdio.h> /* So the fgetpwent() prototypes work */
#endif /* hpux || sgi || OREO */
#ifndef WINNT_NATIVE
#include <pwd.h>
#include <grp.h>
#endif /* WINNT_NATIVE */
#ifdef HAVE_SHADOW_H
# include <shadow.h>
#endif /* HAVE_SHADOW_H */
#ifdef HAVE_AUTH_H
# include <auth.h>
#endif /* HAVE_AUTH_H */
#if defined(BSD) && !defined(POSIX)
# 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 */
#ifdef REMOTEHOST
# ifdef ISC
# undef MAXHOSTNAMELEN /* Busted headers? */
# endif
# include <netinet/in.h>
# include <arpa/inet.h>
# include <sys/socket.h>
# if (defined(_SS_SIZE) || defined(_SS_MAXSIZE)) && defined(HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY)
# if !defined(__APPLE__) /* Damnit, where is getnameinfo() folks? */
# if !defined(sgi)
# if !defined(__CYGWIN__)
# define INET6
# endif /* __CYGWIN__ */
# endif /* sgi */
# endif /* __APPLE__ */
# endif
# include <sys/uio.h> /* For struct iovec */
#endif /* REMOTEHOST */
#ifdef PURIFY
/* 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 */
/*
* ASCII vs. EBCDIC
*/
#if 'Z' - 'A' == 25
# ifndef IS_ASCII
# define IS_ASCII
# endif
#endif
#include "sh.types.h"
#if !HAVE_DECL_GETPGRP
# ifndef GETPGRP_VOID
extern pid_t getpgrp (int);
# else
extern pid_t getpgrp (void);
# endif
#endif
#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 SYSMALLOC
# define xmalloc(i) smalloc(i)
# define xrealloc(p, i) srealloc(p, i)
# define xcalloc(n, s) scalloc(n, s)
# define xfree sfree
#else
# define xmalloc(i) malloc(i)
# define xrealloc(p, i) realloc(p, i)
# define xcalloc(n, s) calloc(n, s)
# define xfree free
#endif /* SYSMALLOC */
#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
*/
#ifdef HESIOD
# include <hesiod.h>
#endif /* HESIOD */
#ifdef REMOTEHOST
# include <netdb.h>
#endif /* REMOTEHOST */
#ifndef MAXHOSTNAMELEN
# ifdef HOST_NAME_MAX
# define MAXHOSTNAMELEN (HOST_NAME_MAX + 1)
# elif defined(SCO) && (SYSVREL > 3)
# include <sys/socket.h>
# else
# define MAXHOSTNAMELEN 256
# endif
#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 int chkstop IZERO; /* Warned of stopped jobs... allow exit */
#if (defined(FIOCLEX) && defined(FIONCLEX)) || defined(F_SETFD)
# define CLOSE_ON_EXEC
#else
EXTERN int didcch IZERO; /* Have closed unused fd's for child */
#endif /* (FIOCLEX && FIONCLEX) || F_SETFD */
EXTERN int didfds IZERO; /* Have setup i/o fd's for child */
EXTERN int doneinp IZERO; /* EOF indicator after reset from readc */
EXTERN int exiterr IZERO; /* Exit if error or non-zero exit status */
EXTERN int child IZERO; /* Child shell ... errors cause exit */
EXTERN int haderr IZERO; /* Reset was because of an error */
EXTERN int intty IZERO; /* Input is a tty */
EXTERN int intact IZERO; /* We are interactive... therefore prompt */
EXTERN int justpr IZERO; /* Just print because of :p hist mod */
EXTERN int loginsh IZERO; /* We are a loginsh -> .login/.logout */
EXTERN int neednote IZERO; /* Need to pnotify() */
EXTERN int noexec IZERO; /* Don't execute, just syntax check */
EXTERN int pjobs IZERO; /* want to print jobs if interrupted */
EXTERN int setintr IZERO; /* Set interrupts on/off -> Wait intr... */
EXTERN int handle_intr IZERO;/* Are we currently handling an interrupt? */
EXTERN int havhash IZERO; /* path hashing is available */
EXTERN int editing IZERO; /* doing filename expansion and line editing */
EXTERN int noediting IZERO; /* initial $term defaulted to noedit */
EXTERN int bslash_quote IZERO;/* PWP: tcsh-style quoting? (in sh.c) */
EXTERN int anyerror IZERO; /* propagate errors from pipelines/backq */
EXTERN int compat_expr IZERO;/* csh-style expressions? */
EXTERN int isoutatty IZERO; /* is SHOUT a tty */
EXTERN int isdiagatty IZERO;/* is SHDIAG a tty */
EXTERN int is1atty IZERO; /* is file descriptor 1 a tty (didfds mode) */
EXTERN int is2atty IZERO; /* is file descriptor 2 a tty (didfds mode) */
EXTERN int arun IZERO; /* Currently running multi-line-aliases */
EXTERN int implicit_cd IZERO;/* implicit cd enabled?(1=enabled,2=verbose) */
EXTERN int inheredoc IZERO; /* Currently parsing a heredoc */
/* We received a window change event */
EXTERN volatile sig_atomic_t windowchg IZERO;
#if defined(KANJI) && defined(SHORT_STRINGS) && defined(DSPMBYTE)
EXTERN int dspmbyte_ls;
#endif
/*
* Global i/o info
*/
EXTERN Char *arginp IZERO; /* Argument input for sh -c and internal `xx` */
EXTERN int onelflg IZERO; /* 2 -> need line for -t, 1 -> exit on read */
extern Char *ffile; /* Name of shell file for $0 */
extern int dolzero; /* if $?0 should return true... */
extern char *seterr; /* Error message from scanner/parser */
#ifndef errno
extern int errno; /* Error from C library routines */
#endif
extern int exitset;
/* Temp name for << shell files in /tmp, for xfree() */
EXTERN Char *shtemp IZERO;
#ifdef BSDTIMES
EXTERN struct timeval time0; /* Time at which the shell started */
EXTERN struct sysrusage 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_ */
EXTERN time_t seconds0;
#endif /* BSDTIMES */
#ifndef HZ
# define HZ 100 /* for division into seconds */
#endif
/*
* Miscellany
*/
EXTERN Char *doldol; /* Character pid for $$ */
EXTERN pid_t 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 uid_t uid, euid; /* Invokers real and effective */
EXTERN gid_t gid, egid; /* User and group ids */
EXTERN pid_t opgrp, /* Initial pgrp and tty pgrp */
shpgrp, /* Pgrp of shell */
tpgrp; /* Terminal process group */
/* If tpgrp is -1, leave tty alone! */
EXTERN Char *Prompt; /* The actual printed prompt or NULL */
EXTERN Char *RPrompt; /* Right-hand side prompt or NULL */
/*
* 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 IZERO; /* Current shell input (script) */
EXTERN int SHOUT IZERO; /* Shell output */
EXTERN int SHDIAG IZERO; /* Diagnostic output... shell errs go here */
EXTERN int OLDSTD IZERO; /* Old standard input (def for cmds) */
#if (SYSVREL == 4 && defined(_UTS)) || defined(__linux__)
/*
* 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 SIGSETJMP
typedef struct { sigjmp_buf j; } jmp_buf_t;
# define setexit() sigsetjmp(reslab.j, 1)
# 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))
extern jmp_buf_t reslab;
EXTERN Char *gointr; /* Label for an onintr transfer */
extern struct sigaction parintr; /* Parents interrupt catch */
extern struct sigaction 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 WIDE_STRINGS /* Implies SHORT_STRINGS */
/* 31st char bit used for 'ing (not 32nd, we want all values nonnegative) */
# define QUOTE 0x40000000
# define TRIM 0x3FFFFFFF /* Mask to strip quote bit */
# define UNDER 0x08000000 /* Underline flag */
# define BOLD 0x04000000 /* Bold flag */
# define STANDOUT 0x02000000 /* Standout flag */
# define LITERAL 0x01000000 /* Literal character flag */
# define ATTRIBUTES 0x0F000000 /* The bits used for attributes */
# define INVALID_BYTE 0x00800000 /* Invalid character on input */
# ifdef SOLARIS2
# define CHAR 0x30FFFFFF /* Mask to mask out the character */
# else
# define CHAR 0x00FFFFFF /* Mask to mask out the character */
# endif
#elif defined (SHORT_STRINGS)
# define QUOTE ((Char) 0100000)/* 16nth char bit used for 'ing */
# define TRIM 0073777 /* Mask to strip quote/lit 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 INVALID_BYTE 0
# 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 INVALID_BYTE 0
# define CHAR 0000177 /* Mask to mask out the character */
#endif
#define CHAR_DBWIDTH (LITERAL|(LITERAL-1))
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.
*
* If (WIDE_STRINGS && cantell), fbobp is always a byte offset, but
* (fseekp - fbobp) and (feobp - fbobp) are character offsets (usable for
* fbuf indexing).
*
* If (!cantell), all offsets are character offsets; if (!WIDE_STRINGS), there
* is no difference between byte and character offsets.
*/
EXTERN struct Bin {
off_t Bfseekp; /* Seek pointer, generally != lseek() value */
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 */
#ifdef WIDE_STRINGS
/* Number of bytes in each character if (cantell) */
unsigned char Bfclens[BUFSIZE + 1];
#endif
} B;
/*
* This structure allows us to seek inside aliases
*/
struct Ain {
int type;
#define TCSH_I_SEEK 0 /* Invalid seek */
#define TCSH_A_SEEK 1 /* Alias seek */
#define TCSH_F_SEEK 2 /* File seek */
#define TCSH_E_SEEK 3 /* Eval seek */
union {
off_t _f_seek; /* A byte offset if (cantell) */
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
#define fclens B.Bfclens
/*
* 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 int 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 struct Strbuf labuf;
EXTERN size_t lap; /* N/A if == labuf.len, index into labuf.s otherwise */
/*
* 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)
*/
#if defined(hpux) && defined(__STDC__) && !defined(__GNUC__)
/* Avoid hpux ansi mode spurious warnings */
typedef void (*bfunc_t) ();
#else
typedef void (*bfunc_t) (Char **, struct command *);
#endif /* hpux && __STDC__ && !__GNUC__ */
extern const struct biltins {
const char *bname;
bfunc_t bfunct;
int minargs, maxargs;
} bfunc[];
extern int nbfunc;
#ifdef WINNT_NATIVE
extern struct biltins nt_bfunc[];
extern int nt_nbfunc;
#endif /* WINNT_NATIVE*/
extern int bequiet;
extern struct srch {
const 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
#define VAR_NOGLOB 4
#define VAR_FIRST 32
#define VAR_LAST 64
struct varent *v_link[3]; /* The links, see below */
int v_bal; /* Balance factor */
} shvhed IZERO_STRUCT, aliases IZERO_STRUCT;
#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 IZERO_STRUCT;/* Argument list (first) */
EXTERN struct wordent *alhistt IZERO_STRUCT;/* Node after last in arg list */
EXTERN Char **alvec IZERO_STRUCT,
*alvecp IZERO_STRUCT;/* The (remnants of) alias vector */
/*
* Filename/command name expansion variables
*/
#ifdef __CYGWIN__
# undef MAXPATHLEN
#endif /* __CYGWIN__ */
#ifndef MAXPATHLEN
# ifdef PATH_MAX
# define MAXPATHLEN PATH_MAX
# else
# define MAXPATHLEN 2048
# endif
#endif /* MAXPATHLEN */
#ifndef HAVENOLIMIT
/*
* resource limits
*/
extern struct limits {
int limconst;
const char *limname;
int limdiv;
const char *limscale;
} limits[];
#endif /* !HAVENOLIMIT */
/*
* 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; /* eventno when inserted into history list */
int Href;
time_t Htime;
Char *histline;
struct Hist *Hnext, *Hprev; /* doubly linked list */
unsigned Hhash; /* hash value of command line */
} Histlist IZERO_STRUCT;
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
# ifdef WIDE_STRINGS
# define samecase(x) (towlower(x))
# else
# define samecase(x) (isupper((unsigned char)(x)) ? \
tolower((unsigned char)(x)) : (x))
# endif
#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 Strcasecmp(a, b) strcasecmp(a, b)
#define Strspl(a, b) strspl(a, b)
#define Strnsave(a, b) strnsave(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) caching_strip(a)
#else
#if defined(WIDE_STRINGS) && !defined(UTF16_STRINGS)
#define Strchr(a, b) wcschr(a, b)
#define Strrchr(a, b) wcsrchr(a, b)
#define Strcat(a, b) wcscat(a, b)
#define Strncat(a, b, c) wcsncat(a, b, c)
#define Strcpy(a, b) wcscpy(a, b)
#define Strncpy(a, b, c) wcsncpy(a, b, c)
#define Strlen(a) wcslen(a)
#define Strcmp(a, b) wcscmp(a, b)
#define Strncmp(a, b, c) wcsncmp(a, b, c)
#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)
#endif
#define Strcasecmp(a, b) s_strcasecmp(a, b)
#define Strspl(a, b) s_strspl(a, b)
#define Strnsave(a, b) s_strnsave(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 const 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 {
const char *iname; /* name from /usr/include */
const 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 IZERO;
extern int dont_free; /* Tell free that we are in danger if we free */
extern Char *INVPTR;
extern Char **INVPPTR;
extern char *progname;
extern int tcsh;
extern int xlate_cr;
extern int output_raw;
extern int lbuffed;
extern time_t Htime;
extern int numeof;
extern int insource;
extern char linbuf[];
extern char *linp;
extern int nsig;
#ifdef VFORK
extern int use_fork;
#endif
extern int tellwhat;
extern int NoNLSRebind;
#if !HAVE_DECL_ENVIRON
extern char **environ;
#endif
#include "tc.h"
#ifndef WINNT_NATIVE
# ifdef NLS_CATALOGS
# ifdef HAVE_FEATURES_H
# include <features.h>
# endif
# ifdef HAVE_NL_LANGINFO
# include <langinfo.h>
# endif
# ifdef __uxps__
# define gettxt gettxt_ds
# endif
# include <nl_types.h>
# ifdef __uxps__
# undef gettxt
# endif
EXTERN nl_catd catd;
# if defined(HAVE_ICONV) && defined(HAVE_NL_LANGINFO)
# define CGETS(b, c, d) iconv_catgets(catd, b, c, d)
# else
# define CGETS(b, c, d) xcatgets(catd, b, c, d)
# endif
# define CSAVS(b, c, d) strsave(CGETS(b, c, d))
# else
# define CGETS(b, c, d) d
# define CSAVS(b, c, d) d
# endif
#else /* WINNT_NATIVE */
# define CGETS(b, c, d) nt_cgets( b, c, d)
# define CSAVS(b, c, d) strsave(CGETS(b, c, d))
#endif /* WINNT_NATIVE */
#if defined(FILEC)
extern int filec;
#endif /* FILEC */
#include "sh.decls.h"
/*
* Since on some machines characters are unsigned, and the signed
* keyword is not universally implemented, we treat all characters
* as unsigned and sign extend them where we need.
*/
#define SIGN_EXTEND_CHAR(a) (((a) & 0x80) ? ((a) | ~0x7f) : (a))
/*
* explanation for use by the "--help" option
*/
#define HELP_STRING "\
-b file batch mode, read and execute commands from `file' \n\
-c command run `command' from next argument \n\
-d load directory stack from `~/.cshdirs' \n\
-Dname[=value] define environment variable `name' to `value' (DomainOS only) \n\
-e exit on any error \n\
-f start faster by ignoring the start-up file \n\
-F use fork() instead of vfork() when spawning (ConvexOS only) \n\
-i interactive, even when input is not from a terminal \n\
-l act as a login shell, must be the only option specified \n\
-m load the start-up file, whether or not owned by effective user \n\
-n file no execute mode, just check syntax of the following `file' \n\
-q accept SIGQUIT for running under a debugger \n\
-s read commands from standard input \n\
-t read one line from standard input \n\
-v echo commands after history substitution \n\
-V like -v but including commands read from the start-up file \n\
-x echo commands immediately before execution \n\
-X like -x but including commands read from the start-up file \n\
--help print this message and exit \n\
--version print the version shell variable and exit \n\
\nSee the tcsh(1) manual page for detailed information.\n"
#include "tc.nls.h"
#endif /* _h_sh */
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