diff options
Diffstat (limited to 'release/picobsd/tinyware/msh/sh2.c')
-rw-r--r-- | release/picobsd/tinyware/msh/sh2.c | 801 |
1 files changed, 0 insertions, 801 deletions
diff --git a/release/picobsd/tinyware/msh/sh2.c b/release/picobsd/tinyware/msh/sh2.c deleted file mode 100644 index f7eaf017..0000000 --- a/release/picobsd/tinyware/msh/sh2.c +++ /dev/null @@ -1,801 +0,0 @@ -#define Extern extern -#include <sys/types.h> -#include <signal.h> -#define _NSIG NSIG -#include <errno.h> -#include <setjmp.h> -#include "sh.h" - -/* -------- csyn.c -------- */ -/* - * shell: syntax (C version) - */ - -typedef union { - char *cp; - char **wp; - int i; - struct op *o; -} YYSTYPE; -#define WORD 256 -#define LOGAND 257 -#define LOGOR 258 -#define BREAK 259 -#define IF 260 -#define THEN 261 -#define ELSE 262 -#define ELIF 263 -#define FI 264 -#define CASE 265 -#define ESAC 266 -#define FOR 267 -#define WHILE 268 -#define UNTIL 269 -#define DO 270 -#define DONE 271 -#define IN 272 -#define YYERRCODE 300 - -/* flags to yylex */ -#define CONTIN 01 /* skip new lines to complete command */ - -/* #include "sh.h" */ -#define SYNTAXERR zzerr() -static int startl; -static int peeksym; -static int nlseen; -static int iounit = IODEFAULT; - -static YYSTYPE yylval; - -_PROTOTYPE(static struct op *pipeline, (int cf )); -_PROTOTYPE(static struct op *andor, (void)); -_PROTOTYPE(static struct op *c_list, (void)); -_PROTOTYPE(static int synio, (int cf )); -_PROTOTYPE(static void musthave, (int c, int cf )); -_PROTOTYPE(static struct op *simple, (void)); -_PROTOTYPE(static struct op *nested, (int type, int mark )); -_PROTOTYPE(static struct op *command, (int cf )); -_PROTOTYPE(static struct op *dogroup, (int onlydone )); -_PROTOTYPE(static struct op *thenpart, (void)); -_PROTOTYPE(static struct op *elsepart, (void)); -_PROTOTYPE(static struct op *caselist, (void)); -_PROTOTYPE(static struct op *casepart, (void)); -_PROTOTYPE(static char **pattern, (void)); -_PROTOTYPE(static char **wordlist, (void)); -_PROTOTYPE(static struct op *list, (struct op *t1, struct op *t2 )); -_PROTOTYPE(static struct op *block, (int type, struct op *t1, struct op *t2, char **wp )); -_PROTOTYPE(static struct op *newtp, (void)); -_PROTOTYPE(static struct op *namelist, (struct op *t )); -_PROTOTYPE(static char **copyw, (void)); -_PROTOTYPE(static void word, (char *cp )); -_PROTOTYPE(static struct ioword **copyio, (void)); -_PROTOTYPE(static struct ioword *io, (int u, int f, char *cp )); -_PROTOTYPE(static void zzerr, (void)); -_PROTOTYPE(void yyerror, (char *s )); -_PROTOTYPE(static int yylex, (int cf )); -_PROTOTYPE(int collect, (int c, int c1 )); -_PROTOTYPE(int dual, (int c )); -_PROTOTYPE(static void diag, (int ec )); -_PROTOTYPE(static char *tree, (unsigned size )); -_PROTOTYPE(void printf, (char *s )); - -int -yyparse() -{ - startl = 1; - peeksym = 0; - yynerrs = 0; - outtree = c_list(); - musthave('\n', 0); - return(yynerrs!=0); -} - -static struct op * -pipeline(cf) -int cf; -{ - register struct op *t, *p; - register int c; - - t = command(cf); - if (t != NULL) { - while ((c = yylex(0)) == '|') { - if ((p = command(CONTIN)) == NULL) - SYNTAXERR; - if (t->type != TPAREN && t->type != TCOM) { - /* shell statement */ - t = block(TPAREN, t, NOBLOCK, NOWORDS); - } - t = block(TPIPE, t, p, NOWORDS); - } - peeksym = c; - } - return(t); -} - -static struct op * -andor() -{ - register struct op *t, *p; - register int c; - - t = pipeline(0); - if (t != NULL) { - while ((c = yylex(0)) == LOGAND || c == LOGOR) { - if ((p = pipeline(CONTIN)) == NULL) - SYNTAXERR; - t = block(c == LOGAND? TAND: TOR, t, p, NOWORDS); - } - peeksym = c; - } - return(t); -} - -static struct op * -c_list() -{ - register struct op *t, *p; - register int c; - - t = andor(); - if (t != NULL) { - if((peeksym = yylex(0)) == '&') - t = block(TASYNC, t, NOBLOCK, NOWORDS); - while ((c = yylex(0)) == ';' || c == '&' || (multiline && c == '\n')) { - if ((p = andor()) == NULL) - return(t); - if((peeksym = yylex(0)) == '&') - p = block(TASYNC, p, NOBLOCK, NOWORDS); - t = list(t, p); - } - peeksym = c; - } - return(t); -} - - -static int -synio(cf) -int cf; -{ - register struct ioword *iop; - register int i; - register int c; - - if ((c = yylex(cf)) != '<' && c != '>') { - peeksym = c; - return(0); - } - i = yylval.i; - musthave(WORD, 0); - iop = io(iounit, i, yylval.cp); - iounit = IODEFAULT; - if (i & IOHERE) - markhere(yylval.cp, iop); - return(1); -} - -static void -musthave(c, cf) -int c, cf; -{ - if ((peeksym = yylex(cf)) != c) - SYNTAXERR; - peeksym = 0; -} - -static struct op * -simple() -{ - register struct op *t; - - t = NULL; - for (;;) { - switch (peeksym = yylex(0)) { - case '<': - case '>': - (void) synio(0); - break; - - case WORD: - if (t == NULL) { - t = newtp(); - t->type = TCOM; - } - peeksym = 0; - word(yylval.cp); - break; - - default: - return(t); - } - } -} - -static struct op * -nested(type, mark) -int type, mark; -{ - register struct op *t; - - multiline++; - t = c_list(); - musthave(mark, 0); - multiline--; - return(block(type, t, NOBLOCK, NOWORDS)); -} - -static struct op * -command(cf) -int cf; -{ - register struct op *t; - struct wdblock *iosave; - register int c; - - iosave = iolist; - iolist = NULL; - if (multiline) - cf |= CONTIN; - while (synio(cf)) - cf = 0; - switch (c = yylex(cf)) { - default: - peeksym = c; - if ((t = simple()) == NULL) { - if (iolist == NULL) - return((struct op *)NULL); - t = newtp(); - t->type = TCOM; - } - break; - - case '(': - t = nested(TPAREN, ')'); - break; - - case '{': - t = nested(TBRACE, '}'); - break; - - case FOR: - t = newtp(); - t->type = TFOR; - musthave(WORD, 0); - startl = 1; - t->str = yylval.cp; - multiline++; - t->words = wordlist(); - if ((c = yylex(0)) != '\n' && c != ';') - peeksym = c; - t->left = dogroup(0); - multiline--; - break; - - case WHILE: - case UNTIL: - multiline++; - t = newtp(); - t->type = c == WHILE? TWHILE: TUNTIL; - t->left = c_list(); - t->right = dogroup(1); - t->words = NULL; - multiline--; - break; - - case CASE: - t = newtp(); - t->type = TCASE; - musthave(WORD, 0); - t->str = yylval.cp; - startl++; - multiline++; - musthave(IN, CONTIN); - startl++; - t->left = caselist(); - musthave(ESAC, 0); - multiline--; - break; - - case IF: - multiline++; - t = newtp(); - t->type = TIF; - t->left = c_list(); - t->right = thenpart(); - musthave(FI, 0); - multiline--; - break; - } - while (synio(0)) - ; - t = namelist(t); - iolist = iosave; - return(t); -} - -static struct op * -dogroup(onlydone) -int onlydone; -{ - register int c; - register struct op *list; - - c = yylex(CONTIN); - if (c == DONE && onlydone) - return((struct op *)NULL); - if (c != DO) - SYNTAXERR; - list = c_list(); - musthave(DONE, 0); - return(list); -} - -static struct op * -thenpart() -{ - register int c; - register struct op *t; - - if ((c = yylex(0)) != THEN) { - peeksym = c; - return((struct op *)NULL); - } - t = newtp(); - t->type = 0; - t->left = c_list(); - if (t->left == NULL) - SYNTAXERR; - t->right = elsepart(); - return(t); -} - -static struct op * -elsepart() -{ - register int c; - register struct op *t; - - switch (c = yylex(0)) { - case ELSE: - if ((t = c_list()) == NULL) - SYNTAXERR; - return(t); - - case ELIF: - t = newtp(); - t->type = TELIF; - t->left = c_list(); - t->right = thenpart(); - return(t); - - default: - peeksym = c; - return((struct op *)NULL); - } -} - -static struct op * -caselist() -{ - register struct op *t; - - t = NULL; - while ((peeksym = yylex(CONTIN)) != ESAC) - t = list(t, casepart()); - return(t); -} - -static struct op * -casepart() -{ - register struct op *t; - - t = newtp(); - t->type = TPAT; - t->words = pattern(); - musthave(')', 0); - t->left = c_list(); - if ((peeksym = yylex(CONTIN)) != ESAC) - musthave(BREAK, CONTIN); - return(t); -} - -static char ** -pattern() -{ - register int c, cf; - - cf = CONTIN; - do { - musthave(WORD, cf); - word(yylval.cp); - cf = 0; - } while ((c = yylex(0)) == '|'); - peeksym = c; - word(NOWORD); - return(copyw()); -} - -static char ** -wordlist() -{ - register int c; - - if ((c = yylex(0)) != IN) { - peeksym = c; - return((char **)NULL); - } - startl = 0; - while ((c = yylex(0)) == WORD) - word(yylval.cp); - word(NOWORD); - peeksym = c; - return(copyw()); -} - -/* - * supporting functions - */ -static struct op * -list(t1, t2) -register struct op *t1, *t2; -{ - if (t1 == NULL) - return(t2); - if (t2 == NULL) - return(t1); - return(block(TLIST, t1, t2, NOWORDS)); -} - -static struct op * -block(type, t1, t2, wp) -int type; -struct op *t1, *t2; -char **wp; -{ - register struct op *t; - - t = newtp(); - t->type = type; - t->left = t1; - t->right = t2; - t->words = wp; - return(t); -} - -struct res { - char *r_name; - int r_val; -} restab[] = { - "for", FOR, - "case", CASE, - "esac", ESAC, - "while", WHILE, - "do", DO, - "done", DONE, - "if", IF, - "in", IN, - "then", THEN, - "else", ELSE, - "elif", ELIF, - "until", UNTIL, - "fi", FI, - - ";;", BREAK, - "||", LOGOR, - "&&", LOGAND, - "{", '{', - "}", '}', - - 0, -}; - -int -rlookup(n) -register char *n; -{ - register struct res *rp; - - for (rp = restab; rp->r_name; rp++) - if (strcmp(rp->r_name, n) == 0) - return(rp->r_val); - return(0); -} - -static struct op * -newtp() -{ - register struct op *t; - - t = (struct op *)tree(sizeof(*t)); - t->type = 0; - t->words = NULL; - t->ioact = NULL; - t->left = NULL; - t->right = NULL; - t->str = NULL; - return(t); -} - -static struct op * -namelist(t) -register struct op *t; -{ - if (iolist) { - iolist = addword((char *)NULL, iolist); - t->ioact = copyio(); - } else - t->ioact = NULL; - if (t->type != TCOM) { - if (t->type != TPAREN && t->ioact != NULL) { - t = block(TPAREN, t, NOBLOCK, NOWORDS); - t->ioact = t->left->ioact; - t->left->ioact = NULL; - } - return(t); - } - word(NOWORD); - t->words = copyw(); - return(t); -} - -static char ** -copyw() -{ - register char **wd; - - wd = getwords(wdlist); - wdlist = 0; - return(wd); -} - -static void -word(cp) -char *cp; -{ - wdlist = addword(cp, wdlist); -} - -static struct ioword ** -copyio() -{ - register struct ioword **iop; - - iop = (struct ioword **) getwords(iolist); - iolist = 0; - return(iop); -} - -static struct ioword * -io(u, f, cp) -int u; -int f; -char *cp; -{ - register struct ioword *iop; - - iop = (struct ioword *) tree(sizeof(*iop)); - iop->io_unit = u; - iop->io_flag = f; - iop->io_name = cp; - iolist = addword((char *)iop, iolist); - return(iop); -} - -static void -zzerr() -{ - yyerror("syntax error"); -} - -void -yyerror(s) -char *s; -{ - yynerrs++; - if (talking && e.iop <= iostack) { - multiline = 0; - while (eofc() == 0 && yylex(0) != '\n') - ; - } - err(s); - fail(); -} - -static int -yylex(cf) -int cf; -{ - register int c, c1; - int atstart; - - if ((c = peeksym) > 0) { - peeksym = 0; - if (c == '\n') - startl = 1; - return(c); - } - nlseen = 0; - e.linep = line; - atstart = startl; - startl = 0; - yylval.i = 0; - -loop: - while ((c = getc(0)) == ' ' || c == '\t') - ; - switch (c) { - default: - if (any(c, "0123456789")) { - unget(c1 = getc(0)); - if (c1 == '<' || c1 == '>') { - iounit = c - '0'; - goto loop; - } - *e.linep++ = c; - c = c1; - } - break; - - case '#': - while ((c = getc(0)) != 0 && c != '\n') - ; - unget(c); - goto loop; - - case 0: - return(c); - - case '$': - *e.linep++ = c; - if ((c = getc(0)) == '{') { - if ((c = collect(c, '}')) != '\0') - return(c); - goto pack; - } - break; - - case '`': - case '\'': - case '"': - if ((c = collect(c, c)) != '\0') - return(c); - goto pack; - - case '|': - case '&': - case ';': - if ((c1 = dual(c)) != '\0') { - startl = 1; - return(c1); - } - startl = 1; - return(c); - case '^': - startl = 1; - return('|'); - case '>': - case '<': - diag(c); - return(c); - - case '\n': - nlseen++; - gethere(); - startl = 1; - if (multiline || cf & CONTIN) { - if (talking && e.iop <= iostack) - prs(cprompt->value); - if (cf & CONTIN) - goto loop; - } - return(c); - - case '(': - case ')': - startl = 1; - return(c); - } - - unget(c); - -pack: - while ((c = getc(0)) != 0 && !any(c, "`$ '\"\t;&<>()|^\n")) - if (e.linep >= elinep) - err("word too long"); - else - *e.linep++ = c; - unget(c); - if(any(c, "\"'`$")) - goto loop; - *e.linep++ = '\0'; - if (atstart && (c = rlookup(line))!=0) { - startl = 1; - return(c); - } - yylval.cp = strsave(line, areanum); - return(WORD); -} - -int -collect(c, c1) -register c, c1; -{ - char s[2]; - - *e.linep++ = c; - while ((c = getc(c1)) != c1) { - if (c == 0) { - unget(c); - s[0] = c1; - s[1] = 0; - prs("no closing "); yyerror(s); - return(YYERRCODE); - } - if (talking && c == '\n' && e.iop <= iostack) - prs(cprompt->value); - *e.linep++ = c; - } - *e.linep++ = c; - return(0); -} - -int -dual(c) -register c; -{ - char s[3]; - register char *cp = s; - - *cp++ = c; - *cp++ = getc(0); - *cp = 0; - if ((c = rlookup(s)) == 0) - unget(*--cp); - return(c); -} - -static void -diag(ec) -register int ec; -{ - register int c; - - c = getc(0); - if (c == '>' || c == '<') { - if (c != ec) - zzerr(); - yylval.i = ec == '>'? IOWRITE|IOCAT: IOHERE; - c = getc(0); - } else - yylval.i = ec == '>'? IOWRITE: IOREAD; - if (c != '&' || yylval.i == IOHERE) - unget(c); - else - yylval.i |= IODUP; -} - -static char * -tree(size) -unsigned size; -{ - register char *t; - - if ((t = getcell(size)) == NULL) { - prs("command line too complicated\n"); - fail(); - /* NOTREACHED */ - } - return(t); -} - -/* VARARGS1 */ -/* ARGSUSED */ -void -printf(s) /* yyparse calls it */ -char *s; -{ -} - |