Resurrect Minix sh(1), after its license has been changed to BSD one.

1 files changed, 388 insertions, 0 deletions

diff --git a/release/picobsd/tinyware/msh/sh.h b/release/picobsd/tinyware/msh/sh.h
new file mode 100644
index 000000000000..223761eb18c7
--- /dev/null
+++ b/release/picobsd/tinyware/msh/sh.h
@@ -0,0 +1,388 @@
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+/* Need a way to have void used for ANSI, nothing for K&R. */
+#ifndef _ANSI
+#undef _VOID
+#define _VOID
+#endif
+
+/* -------- sh.h -------- */
+/*
+ * shell
+ */
+
+#define	LINELIM	2100
+#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
+ */
+#ifdef __STDC__
+typedef void xint;	/* base type of jmp_buf, for not broken compilers */
+#else
+typedef char * xint;	/* base type of jmp_buf, for broken compilers */
+#endif
+
+/*
+ * shell components
+ */
+/* #include "area.h" */
+/* #include "word.h" */
+/* #include "io.h" */
+/* #include "var.h" */
+
+#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	9
+#define	TIF	10
+#define	TWHILE	11
+#define	TUNTIL	12
+#define	TELIF	13
+#define	TPAT	14	/* pattern in case */
+#define	TBRACE	15	/* {c-list} */
+#define	TASYNC	16	/* c & */
+
+/*
+ * actions determining the environment of a process
+ */
+#define	BIT(i)	(1<<(i))
+#define	FEXEC	BIT(0)	/* execute without forking */
+
+/*
+ * flags to control evaluation of words
+ */
+#define	DOSUB	1	/* interpret $, `, and quotes */
+#define	DOBLANK	2	/* perform blank interpretation */
+#define	DOGLOB	4	/* interpret [?* */
+#define	DOKEY	8	/* move words with `=' to 2nd arg. list */
+#define	DOTRIM	16	/* trim resulting string */
+
+#define	DOALL	(DOSUB|DOBLANK|DOGLOB|DOKEY|DOTRIM)
+
+Extern	char	**dolv;
+Extern	int	dolc;
+Extern	int	exstat;
+Extern  char	gflg;
+Extern  int	talking;	/* interactive (talking-type wireless) */
+Extern  int	execflg;
+Extern  int	multiline;	/* \n changed to ; */
+Extern  struct	op	*outtree;	/* result from parser */
+
+Extern	xint	*failpt;
+Extern	xint	*errpt;
+
+struct	brkcon {
+	jmp_buf	brkpt;
+	struct	brkcon	*nextlev;
+} ;
+Extern	struct brkcon	*brklist;
+Extern	int	isbreak;
+
+/*
+ * redirection
+ */
+struct ioword {
+	short	io_unit;	/* unit affected */
+	short	io_flag;	/* action (below) */
+	char	*io_name;	/* file name */
+};
+#define	IOREAD	1	/* < */
+#define	IOHERE	2	/* << (here file) */
+#define	IOWRITE	4	/* > */
+#define	IOCAT	8	/* >> */
+#define	IOXHERE	16	/* ${}, ` in << */
+#define	IODUP	32	/* >&digit */
+#define	IOCLOSE	64	/* >&- */
+
+#define	IODEFAULT (-1)	/* token for default IO unit */
+
+Extern	struct	wdblock	*wdlist;
+Extern	struct	wdblock	*iolist;
+
+/*
+ * parsing & execution environment
+ */
+extern struct	env {
+	char	*linep;
+	struct	io	*iobase;
+	struct	io	*iop;
+	xint	*errpt;
+	int	iofd;
+	struct	env	*oenv;
+} e;
+
+/*
+ * flags:
+ * -e: quit on error
+ * -k: look for name=value everywhere on command line
+ * -n: no execution
+ * -t: exit after reading and executing one command
+ * -v: echo as read
+ * -x: trace
+ * -u: unset variables net diagnostic
+ */
+extern	char	*flag;
+
+extern	char	*null;	/* null value for variable */
+extern	int	intr;	/* interrupt pending */
+
+Extern	char	*trap[_NSIG+1];
+Extern	char	ourtrap[_NSIG+1];
+Extern	int	trapset;	/* trap pending */
+
+extern	int	heedint;	/* heed interrupt signals */
+
+Extern	int	yynerrs;	/* yacc */
+
+Extern	char	line[LINELIM];
+extern	char	*elinep;
+
+/*
+ * other functions
+ */
+#ifdef __STDC__
+int (*inbuilt(char *s ))(void);
+#else
+int (*inbuilt())();
+#endif
+
+#ifdef __FreeBSD__
+#define _PROTOTYPE(x,y) x ## y
+#endif
+
+_PROTOTYPE(char *rexecve , (char *c , char **v , char **envp ));
+_PROTOTYPE(char *space , (int n ));
+_PROTOTYPE(char *strsave , (char *s , int a ));
+_PROTOTYPE(char *evalstr , (char *cp , int f ));
+_PROTOTYPE(char *putn , (int n ));
+_PROTOTYPE(char *itoa , (unsigned u , int n ));
+_PROTOTYPE(char *unquote , (char *as ));
+_PROTOTYPE(struct var *lookup , (char *n ));
+_PROTOTYPE(int rlookup , (char *n ));
+_PROTOTYPE(struct wdblock *glob , (char *cp , struct wdblock *wb ));
+_PROTOTYPE(int subgetc , (int ec , int quoted ));
+_PROTOTYPE(char **makenv , (void));
+_PROTOTYPE(char **eval , (char **ap , int f ));
+_PROTOTYPE(int setstatus , (int s ));
+_PROTOTYPE(int waitfor , (int lastpid , int canintr ));
+
+_PROTOTYPE(void onintr , (int s )); /* SIGINT handler */
+
+_PROTOTYPE(int newenv , (int f ));
+_PROTOTYPE(void quitenv , (void));
+_PROTOTYPE(void err , (char *s ));
+_PROTOTYPE(int anys , (char *s1 , char *s2 ));
+_PROTOTYPE(int any , (int c , char *s ));
+_PROTOTYPE(void next , (int f ));
+_PROTOTYPE(void setdash , (void));
+_PROTOTYPE(void onecommand , (void));
+_PROTOTYPE(void runtrap , (int i ));
+_PROTOTYPE(void xfree , (char *s ));
+_PROTOTYPE(int letter , (int c ));
+_PROTOTYPE(int digit , (int c ));
+_PROTOTYPE(int letnum , (int c ));
+_PROTOTYPE(int gmatch , (char *s , char *p ));
+
+/*
+ * error handling
+ */
+_PROTOTYPE(void leave , (void)); /* abort shell (or fail in subshell) */
+_PROTOTYPE(void fail , (void));	 /* fail but return to process next command */
+_PROTOTYPE(void warn , (char *s ));
+_PROTOTYPE(void sig , (int i ));	 /* default signal handler */
+
+/* -------- var.h -------- */
+
+struct	var {
+	char	*value;
+	char	*name;
+	struct	var	*next;
+	char	status;
+};
+#define	COPYV	1	/* flag to setval, suggesting copy */
+#define	RONLY	01	/* variable is read-only */
+#define	EXPORT	02	/* variable is to be exported */
+#define	GETCELL	04	/* name & value space was got with getcell */
+
+Extern	struct	var	*vlist;		/* dictionary */
+
+Extern	struct	var	*homedir;	/* home directory */
+Extern	struct	var	*prompt;	/* main prompt */
+Extern	struct	var	*cprompt;	/* continuation prompt */
+Extern	struct	var	*path;		/* search path for commands */
+Extern	struct	var	*shell;		/* shell to interpret command files */
+Extern	struct	var	*ifs;		/* field separators */
+
+_PROTOTYPE(int yyparse , (void));
+_PROTOTYPE(struct var *lookup , (char *n ));
+_PROTOTYPE(void setval , (struct var *vp , char *val ));
+_PROTOTYPE(void nameval , (struct var *vp , char *val , char *name ));
+_PROTOTYPE(void export , (struct var *vp ));
+_PROTOTYPE(void ronly , (struct var *vp ));
+_PROTOTYPE(int isassign , (char *s ));
+_PROTOTYPE(int checkname , (char *cp ));
+_PROTOTYPE(int assign , (char *s , int cf ));
+_PROTOTYPE(void putvlist , (int f , int out ));
+_PROTOTYPE(int eqname , (char *n1 , char *n2 ));
+
+_PROTOTYPE(int execute , (struct op *t , int *pin , int *pout , int act ));
+
+/* -------- io.h -------- */
+/* io buffer */
+struct iobuf {
+  unsigned id;				/* buffer id */
+  char buf[512];			/* buffer */
+  char *bufp;				/* pointer into buffer */
+  char *ebufp;				/* pointer to end of buffer */
+};
+
+/* possible arguments to an IO function */
+struct ioarg {
+	char	*aword;
+	char	**awordlist;
+	int	afile;		/* file descriptor */
+	unsigned afid;		/* buffer id */
+	long	afpos;		/* file position */
+	struct iobuf *afbuf;	/* buffer for this file */
+};
+Extern struct ioarg ioargstack[NPUSH];
+#define AFID_NOBUF	(~0)
+#define AFID_ID		0
+
+/* an input generator's state */
+struct	io {
+	int	(*iofn)(_VOID);
+	struct	ioarg	*argp;
+	int	peekc;
+	char	prev;		/* previous character read by readc() */
+	char	nlcount;	/* for `'s */
+	char	xchar;		/* for `'s */
+	char	task;		/* reason for pushed IO */
+};
+Extern	struct	io	iostack[NPUSH];
+#define	XOTHER	0	/* none of the below */
+#define	XDOLL	1	/* expanding ${} */
+#define	XGRAVE	2	/* expanding `'s */
+#define	XIO	3	/* file IO */
+
+/* in substitution */
+#define	INSUB()	(e.iop->task == XGRAVE || e.iop->task == XDOLL)
+
+/*
+ * input generators for IO structure
+ */
+_PROTOTYPE(int nlchar , (struct ioarg *ap ));
+_PROTOTYPE(int strchar , (struct ioarg *ap ));
+_PROTOTYPE(int qstrchar , (struct ioarg *ap ));
+_PROTOTYPE(int filechar , (struct ioarg *ap ));
+_PROTOTYPE(int herechar , (struct ioarg *ap ));
+_PROTOTYPE(int linechar , (struct ioarg *ap ));
+_PROTOTYPE(int gravechar , (struct ioarg *ap , struct io *iop ));
+_PROTOTYPE(int qgravechar , (struct ioarg *ap , struct io *iop ));
+_PROTOTYPE(int dolchar , (struct ioarg *ap ));
+_PROTOTYPE(int wdchar , (struct ioarg *ap ));
+_PROTOTYPE(void scraphere , (void));
+_PROTOTYPE(void freehere , (int area ));
+_PROTOTYPE(void gethere , (void));
+_PROTOTYPE(void markhere , (char *s , struct ioword *iop ));
+_PROTOTYPE(int herein , (char *hname , int xdoll ));
+_PROTOTYPE(int run , (struct ioarg *argp , int (*f)(_VOID)));
+
+/*
+ * IO functions
+ */
+_PROTOTYPE(int eofc , (void));
+_PROTOTYPE(int getc , (int ec ));
+_PROTOTYPE(int readc , (void));
+_PROTOTYPE(void unget , (int c ));
+_PROTOTYPE(void ioecho , (int c ));
+_PROTOTYPE(void prs , (char *s ));
+_PROTOTYPE(void putc , (int c ));
+_PROTOTYPE(void prn , (unsigned u ));
+_PROTOTYPE(void closef , (int i ));
+_PROTOTYPE(void closeall , (void));
+
+/*
+ * IO control
+ */
+_PROTOTYPE(void pushio , (struct ioarg *argp , int (*fn)(_VOID)));
+_PROTOTYPE(int remap , (int fd ));
+_PROTOTYPE(int openpipe , (int *pv ));
+_PROTOTYPE(void closepipe , (int *pv ));
+_PROTOTYPE(struct io *setbase , (struct io *ip ));
+
+extern	struct	ioarg	temparg;	/* temporary for PUSHIO */
+#define	PUSHIO(what,arg,gen) ((temparg.what = (arg)),pushio(&temparg,(gen)))
+#define	RUN(what,arg,gen) ((temparg.what = (arg)), run(&temparg,(gen)))
+
+/* -------- word.h -------- */
+#ifndef WORD_H
+#define	WORD_H	1
+struct	wdblock {
+	short	w_bsize;
+	short	w_nword;
+	/* bounds are arbitrary */
+	char	*w_words[1];
+};
+
+_PROTOTYPE(struct wdblock *addword , (char *wd , struct wdblock *wb ));
+_PROTOTYPE(struct wdblock *newword , (int nw ));
+_PROTOTYPE(char **getwords , (struct wdblock *wb ));
+#endif
+
+/* -------- area.h -------- */
+
+/*
+ * storage allocation
+ */
+_PROTOTYPE(char *getcell , (unsigned nbytes ));
+_PROTOTYPE(void garbage , (void));
+_PROTOTYPE(void setarea , (char *cp , int a ));
+_PROTOTYPE(int getarea , (char *cp ));
+_PROTOTYPE(void freearea , (int a ));
+_PROTOTYPE(void freecell , (char *cp ));
+
+Extern	int	areanum;	/* current allocation area */
+
+#define	NEW(type) (type *)getcell(sizeof(type))
+#define	DELETE(obj)	freecell((char *)obj)