msh.c

为samsung2410 ARM移植的busybox工具包

/* vi: set sw=4 ts=4: */
/*
 * Minix shell port for busybox
 *
 * This version of the Minix shell was adapted for use in busybox
 * by Erik Andersen <[e-mail]> and
 *    Vladimir Oleynik <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Original copyright notice is retained at the end of this file.
 */

/* -------- sh.h -------- */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#include <setjmp.h>
#include <stddef.h>
#include <time.h>
#include <sys/times.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/dir.h>
#include <limits.h>


#include "cmdedit.h"
#include "busybox.h"
#ifdef test
//#undef BB_FEATURE_COMMAND_EDITING
const char *applet_name = "msh";

#define TEST_NEW_VERSION
#define Abort() { fprintf(stderr, "Abort %d\n", __LINE__); abort(); }
#else
#undef TEST_NEW_VERSION
#define Abort() abort()
#endif

/*
 * shell
 */

#define LINELIM 4096
#define NPUSH   8				/* limit to input nesting */

#define NOFILE  20				/* Number of open files */
#define NUFILE  10				/* Number of user-accessible files */
#define FDBASE  10				/* First file usable by Shell */

/*
 * values returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)

/*
 * library and system defintions
 */
typedef void xint;				/* base type of jmp_buf, for not broken compilers */

/*
 * shell components
 */

#define QUOTE   0200

#define NOBLOCK ((struct op *)NULL)
#define NOWORD  ((char *)NULL)
#define NOWORDS ((char **)NULL)
#define NOPIPE  ((int *)NULL)

/*
 * Description of a command or an operation on commands.
 * Might eventually use a union.
 */
struct op {
	int type;					/* operation type, see below */
	char **words;				/* arguments to a command */
	struct ioword **ioact;		/* IO actions (eg, < > >>) */
	struct op *left;
	struct op *right;
	char *str;					/* identifier for case and for */
};

#define TCOM    1				/* command */
#define TPAREN  2				/* (c-list) */
#define TPIPE   3				/* a | b */
#define TLIST   4				/* a [&;] b */
#define TOR     5				/* || */
#define TAND    6				/* && */
#define TFOR    7
#define TDO     8
#define TCASE   lues returned by wait
 */
#define WAITSIG(s) ((s)&0177)
#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)