diff options
Diffstat (limited to 'usr.bin/m4/main.c')
-rw-r--r-- | usr.bin/m4/main.c | 811 |
1 files changed, 0 insertions, 811 deletions
diff --git a/usr.bin/m4/main.c b/usr.bin/m4/main.c deleted file mode 100644 index cba65ad..0000000 --- a/usr.bin/m4/main.c +++ /dev/null @@ -1,811 +0,0 @@ -/* $OpenBSD: main.c,v 1.77 2009/10/14 17:19:47 sthen Exp $ */ -/* $NetBSD: main.c,v 1.46 2016/01/23 14:24:43 christos Exp $ */ - -/*- - * Copyright (c) 1989, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Ozan Yigit at York University. - * - * 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. - */ - -/* - * main.c - * Facility: m4 macro processor - * by: oz - */ -#if HAVE_NBTOOL_CONFIG_H -#include "nbtool_config.h" -#endif -#include <sys/cdefs.h> -__RCSID("$NetBSD: main.c,v 1.46 2016/01/23 14:24:43 christos Exp $"); -#include <assert.h> -#include <signal.h> -#include <getopt.h> -#include <err.h> -#include <errno.h> -#include <unistd.h> -#include <stdio.h> -#include <ctype.h> -#include <string.h> -#include <stddef.h> -#include <stdint.h> -#include <stdlib.h> -#include <ohash.h> -#include "mdef.h" -#include "stdd.h" -#include "extern.h" -#include "pathnames.h" - -ndptr hashtab[HASHSIZE]; /* hash table for macros etc. */ -stae *mstack; /* stack of m4 machine */ -char *sstack; /* shadow stack, for string space extension */ -static size_t STACKMAX; /* current maximum size of stack */ -int sp; /* current m4 stack pointer */ -int fp; /* m4 call frame pointer */ -struct input_file infile[MAXINP];/* input file stack (0=stdin) */ -FILE **outfile; /* diversion array(0=bitbucket)*/ -int maxout; -FILE *active; /* active output file pointer */ -int ilevel = 0; /* input file stack pointer */ -int oindex = 0; /* diversion index.. */ -const char *null = ""; /* as it says.. just a null.. */ -char **m4wraps = NULL; /* m4wraps array. */ -int maxwraps = 0; /* size of m4wraps array */ -int wrapindex = 0; /* current offset in m4wraps */ -char lquote[MAXCCHARS+1] = {LQUOTE}; /* left quote character (`) */ -char rquote[MAXCCHARS+1] = {RQUOTE}; /* right quote character (') */ -char scommt[MAXCCHARS+1] = {SCOMMT}; /* start character for comment */ -char ecommt[MAXCCHARS+1] = {ECOMMT}; /* end character for comment */ -int synch_lines = 0; /* line synchronisation for C preprocessor */ -int prefix_builtins = 0; /* -P option to prefix builtin keywords */ -int fatal_warnings = 0; /* -E option to exit on warnings */ -int quiet = 0; /* -Q option to silence warnings */ -int nesting_limit = -1; /* -L for nesting limit */ -const char *freeze = NULL; /* -F to freeze state */ -const char *reload = NULL; /* -R to reload state */ -#ifndef REAL_FREEZE -FILE *freezef = NULL; -int thawing = 0; -#endif - -struct keyblk { - const char *knam; /* keyword name */ - int ktyp; /* keyword type */ -}; - -struct keyblk keywrds[] = { /* m4 keywords to be installed */ - { "include", INCLTYPE }, - { "sinclude", SINCTYPE }, - { "define", DEFITYPE }, - { "defn", DEFNTYPE }, - { "divert", DIVRTYPE | NOARGS }, - { "expr", EXPRTYPE }, - { "eval", EXPRTYPE }, - { "substr", SUBSTYPE }, - { "ifelse", IFELTYPE }, - { "ifdef", IFDFTYPE }, - { "len", LENGTYPE }, - { "incr", INCRTYPE }, - { "decr", DECRTYPE }, - { "dnl", DNLNTYPE | NOARGS }, - { "changequote", CHNQTYPE | NOARGS }, - { "changecom", CHNCTYPE | NOARGS }, - { "index", INDXTYPE }, -#ifdef EXTENDED - { "paste", PASTTYPE }, - { "spaste", SPASTYPE }, - /* Newer extensions, needed to handle gnu-m4 scripts */ - { "indir", INDIRTYPE}, - { "builtin", BUILTINTYPE}, - { "patsubst", PATSTYPE}, - { "regexp", REGEXPTYPE}, - { "esyscmd", ESYSCMDTYPE}, - { "__file__", FILENAMETYPE | NOARGS}, - { "__line__", LINETYPE | NOARGS}, -#endif - { "popdef", POPDTYPE }, - { "pushdef", PUSDTYPE }, - { "dumpdef", DUMPTYPE | NOARGS }, - { "shift", SHIFTYPE | NOARGS }, - { "translit", TRNLTYPE }, - { "undefine", UNDFTYPE }, - { "undivert", UNDVTYPE | NOARGS }, - { "divnum", DIVNTYPE | NOARGS }, - { "maketemp", MKTMTYPE }, - { "errprint", ERRPTYPE | NOARGS }, - { "m4wrap", M4WRTYPE | NOARGS }, - { "m4exit", EXITTYPE | NOARGS }, - { "syscmd", SYSCTYPE }, - { "sysval", SYSVTYPE | NOARGS }, - { "traceon", TRACEONTYPE | NOARGS }, - { "traceoff", TRACEOFFTYPE | NOARGS }, - -#if defined(unix) || defined(__unix__) - { "unix", SELFTYPE | NOARGS }, -#else -#ifdef vms - { "vms", SELFTYPE | NOARGS }, -#endif -#endif -}; - -#define MAXKEYS (sizeof(keywrds)/sizeof(struct keyblk)) - -#define MAXRECORD 50 -static struct position { - char *name; - unsigned long line; -} quotes[MAXRECORD], paren[MAXRECORD]; - -static void record(struct position *, int); -static void dump_stack(struct position *, int); - -static void macro(void); -static void initkwds(void); -static ndptr inspect(int, char *); -static int do_look_ahead(int, const char *); -static void reallyoutputstr(const char *); -static void reallyputchar(int); - -static void enlarge_stack(void); -static void help(void); - -static void -usage(FILE *f) -{ - fprintf(f, "Usage: %s [-EGgiPQsv] [-Dname[=value]] [-d flags] " - "[-I dirname] [-o filename] [-L limit]\n" - "\t[-t macro] [-Uname] [file ...]\n", getprogname()); -} - -__dead static void -onintr(int signo) -{ - char intrmessage[] = "m4: interrupted.\n"; - write(STDERR_FILENO, intrmessage, sizeof(intrmessage)-1); - _exit(1); -} - -#define OPT_HELP 1 - -struct option longopts[] = { - { "debug", optional_argument, 0, 'd' }, - { "define", required_argument, 0, 'D' }, - { "error-output", required_argument, 0, 'e' }, - { "fatal-warnings", no_argument, 0, 'E' }, - { "freeze-state", required_argument, 0, 'F' }, - { "gnu", no_argument, 0, 'g' }, - { "help", no_argument, 0, OPT_HELP }, - { "include", required_argument, 0, 'I' }, - { "interactive", no_argument, 0, 'i' }, - { "nesting-limit", required_argument, 0, 'L' }, - { "prefix-builtins", no_argument, 0, 'P' }, - { "quiet", no_argument, 0, 'Q' }, - { "reload-state", required_argument, 0, 'R' }, - { "silent", no_argument, 0, 'Q' }, - { "synclines", no_argument, 0, 's' }, - { "trace", required_argument, 0, 't' }, - { "traditional", no_argument, 0, 'G' }, - { "undefine", required_argument, 0, 'U' }, - { "version", no_argument, 0, 'v' }, -#ifdef notyet - { "arglength", required_argument, 0, 'l' }, - { "debugfile", optional_argument, 0, OPT_DEBUGFILE }, - { "hashsize", required_argument, 0, 'H' }, - { "warn-macro-sequence",optional_argument, 0, OPT_WARN_SEQUENCE }, -#endif - { 0, 0, 0, 0 }, -}; - -int -main(int argc, char *argv[]) -{ - int c; - int n; - char *p; - - setprogname(argv[0]); - - if (signal(SIGINT, SIG_IGN) != SIG_IGN) - signal(SIGINT, onintr); - - init_macros(); - initspaces(); - STACKMAX = INITSTACKMAX; - - mstack = (stae *)xalloc(sizeof(stae) * STACKMAX, NULL); - sstack = (char *)xalloc(STACKMAX, NULL); - - maxout = 0; - outfile = NULL; - resizedivs(MAXOUT); - - while ((c = getopt_long(argc, argv, "D:d:e:EF:GgI:iL:o:PR:Qst:U:v", - longopts, NULL)) != -1) - switch(c) { - case 'D': /* define something..*/ - for (p = optarg; *p; p++) - if (*p == '=') - break; - if (*p) - *p++ = EOS; - dodefine(optarg, p); - break; - case 'd': - set_trace_flags(optarg); - break; - case 'E': - fatal_warnings++; - break; - case 'e': - if (freopen(optarg, "w+", stderr) == NULL) - err(EXIT_FAILURE, "Can't redirect errors to `%s'", - optarg); - break; - case 'F': - freeze = optarg; -#ifndef REAL_FREEZE - if ((freezef = fopen(freeze, "w")) == NULL) - err(EXIT_FAILURE, "Can't open `%s'", freeze); -#endif - break; - case 'I': - addtoincludepath(optarg); - break; - case 'i': - setvbuf(stdout, NULL, _IONBF, 0); - signal(SIGINT, SIG_IGN); - break; - case 'G': - mimic_gnu = 0; - break; - case 'g': - mimic_gnu = 1; - break; - case 'L': - nesting_limit = atoi(optarg); - break; - case 'o': - trace_file(optarg); - break; - case 'P': - prefix_builtins = 1; - break; - case 'Q': - quiet++; - break; - case 'R': - reload = optarg; - break; - case 's': - synch_lines = 1; - break; - case 't': - mark_traced(optarg, 1); - break; - case 'U': /* undefine... */ - macro_popdef(optarg); - break; - case 'v': - fprintf(stderr, "%s version %d\n", getprogname(), - VERSION); - return EXIT_SUCCESS; - case OPT_HELP: - help(); - return EXIT_SUCCESS; - case '?': - default: - usage(stderr); - return EXIT_FAILURE; - } - -#ifdef REDIRECT - /* - * This is meant only for debugging; it makes all output - * go to a known file, even if the command line options - * send it elsewhere. It should not be turned of in production code. - */ - if (freopen("/tmp/m4", "w+", stderr) == NULL) - err(EXIT_FAILURE, "Can't redirect errors to `%s'", - "/tmp/m4"); -#endif - argc -= optind; - argv += optind; - - - initkwds(); - if (mimic_gnu) - setup_builtin("format", FORMATTYPE); - - active = stdout; /* default active output */ - bbase[0] = bufbase; - - if (reload) { -#ifdef REAL_FREEZE - thaw_state(reload); -#else - if (fopen_trypath(infile, reload) == NULL) - err(1, "Can't open `%s'", reload); - sp = -1; - fp = 0; - thawing = 1; - macro(); - thawing = 0; - release_input(infile); -#endif - } - - if (!argc) { - sp = -1; /* stack pointer initialized */ - fp = 0; /* frame pointer initialized */ - set_input(infile+0, stdin, "stdin"); - /* default input (naturally) */ - macro(); - } else - for (; argc--; ++argv) { - p = *argv; - if (p[0] == '-' && p[1] == EOS) - set_input(infile, stdin, "stdin"); - else if (fopen_trypath(infile, p) == NULL) - err(1, "%s", p); - sp = -1; - fp = 0; - macro(); - release_input(infile); - } - - if (wrapindex) { - int i; - - ilevel = 0; /* in case m4wrap includes.. */ - bufbase = bp = buf; /* use the entire buffer */ - if (mimic_gnu) { - while (wrapindex != 0) { - for (i = 0; i < wrapindex; i++) - pbstr(m4wraps[i]); - wrapindex =0; - macro(); - } - } else { - for (i = 0; i < wrapindex; i++) { - pbstr(m4wraps[i]); - macro(); - } - } - } - - if (active != stdout) - active = stdout; /* reset output just in case */ - for (n = 1; n < maxout; n++) /* default wrap-up: undivert */ - if (outfile[n] != NULL) - getdiv(n); - /* remove bitbucket if used */ - if (outfile[0] != NULL) { - (void) fclose(outfile[0]); - } - -#ifdef REAL_FREEZE - if (freeze) - freeze_state(freeze); -#else - if (freezef) - fclose(freezef); -#endif - - return 0; -} - -/* - * Look ahead for `token'. - * (on input `t == token[0]') - * Used for comment and quoting delimiters. - * Returns 1 if `token' present; copied to output. - * 0 if `token' not found; all characters pushed back - */ -static int -do_look_ahead(int t, const char *token) -{ - int i; - - assert((unsigned char)t == (unsigned char)token[0]); - - for (i = 1; *++token; i++) { - t = gpbc(); - if (t == EOF || (unsigned char)t != (unsigned char)*token) { - pushback(t); - while (--i) - pushback(*--token); - return 0; - } - } - return 1; -} - -#define LOOK_AHEAD(t, token) (t != EOF && \ - (unsigned char)(t)==(unsigned char)(token)[0] && \ - do_look_ahead(t,token)) - -/* - * macro - the work horse.. - */ -static void -macro(void) -{ - char token[MAXTOK+1]; - int t, l; - ndptr p; - int nlpar; - - cycle { - t = gpbc(); - - if (LOOK_AHEAD(t,lquote)) { /* strip quotes */ - nlpar = 0; - record(quotes, nlpar++); - /* - * Opening quote: scan forward until matching - * closing quote has been found. - */ - do { - - l = gpbc(); - if (LOOK_AHEAD(l,rquote)) { - if (--nlpar > 0) - outputstr(rquote); - } else if (LOOK_AHEAD(l,lquote)) { - record(quotes, nlpar++); - outputstr(lquote); - } else if (l == EOF) { - if (!quiet) { - if (nlpar == 1) - warnx("unclosed quote:"); - else - warnx( - "%d unclosed quotes:", - nlpar); - dump_stack(quotes, nlpar); - } - exit(EXIT_FAILURE); - } else { - if (nlpar > 0) { - if (sp < 0) - reallyputchar(l); - else - CHRSAVE(l); - } - } - } - while (nlpar != 0); - } else if (sp < 0 && LOOK_AHEAD(t, scommt)) { - reallyoutputstr(scommt); - - for(;;) { - t = gpbc(); - if (LOOK_AHEAD(t, ecommt)) { - reallyoutputstr(ecommt); - break; - } - if (t == EOF) - break; - reallyputchar(t); - } - } else if (t == '_' || isalpha(t)) { - p = inspect(t, token); - if (p != NULL) - pushback(l = gpbc()); - if (p == NULL || (l != LPAREN && - (macro_getdef(p)->type & NEEDARGS) != 0)) - outputstr(token); - else { - /* - * real thing.. First build a call frame: - */ - pushf(fp); /* previous call frm */ - pushf(macro_getdef(p)->type); /* type of the call */ - pushf(is_traced(p)); - pushf(0); /* parenthesis level */ - fp = sp; /* new frame pointer */ - /* - * now push the string arguments: - */ - pushs1(macro_getdef(p)->defn); /* defn string */ - pushs1((char *)macro_name(p)); /* macro name */ - pushs(ep); /* start next..*/ - - if (l != LPAREN && PARLEV == 0) { - /* no bracks */ - chrsave(EOS); - - if ((size_t)sp == STACKMAX) - errx(1, "internal stack overflow"); - eval((const char **) mstack+fp+1, 2, - CALTYP, TRACESTATUS); - - ep = PREVEP; /* flush strspace */ - sp = PREVSP; /* previous sp.. */ - fp = PREVFP; /* rewind stack...*/ - } - } - } else if (t == EOF) { - if (sp > -1 && ilevel <= 0) { - if (!quiet) { - warnx("unexpected end of input, " - "unclosed parenthesis:"); - dump_stack(paren, PARLEV); - } - exit(EXIT_FAILURE); - } - if (ilevel <= 0) - break; /* all done thanks.. */ - release_input(infile+ilevel--); - emit_synchline(); - bufbase = bbase[ilevel]; - continue; - } else if (sp < 0) { /* not in a macro at all */ - reallyputchar(t); /* output directly.. */ - } - - else switch(t) { - - case LPAREN: - if (PARLEV > 0) - chrsave(t); - while (isspace(l = gpbc())) /* skip blank, tab, nl.. */ - if (PARLEV > 0) - chrsave(l); - pushback(l); - record(paren, PARLEV++); - break; - - case RPAREN: - if (--PARLEV > 0) - chrsave(t); - else { /* end of argument list */ - chrsave(EOS); - - if ((size_t)sp == STACKMAX) - errx(1, "internal stack overflow"); - - eval((const char **) mstack+fp+1, sp-fp, - CALTYP, TRACESTATUS); - - ep = PREVEP; /* flush strspace */ - sp = PREVSP; /* previous sp.. */ - fp = PREVFP; /* rewind stack...*/ - } - break; - - case COMMA: - if (PARLEV == 1) { - chrsave(EOS); /* new argument */ - while (isspace(l = gpbc())) - ; - pushback(l); - pushs(ep); - } else - chrsave(t); - break; - - default: - if (LOOK_AHEAD(t, scommt)) { - char *q; - for (q = scommt; *q; q++) - chrsave(*q); - for(;;) { - t = gpbc(); - if (LOOK_AHEAD(t, ecommt)) { - for (q = ecommt; *q; q++) - chrsave(*q); - break; - } - if (t == EOF) - break; - CHRSAVE(t); - } - } else - CHRSAVE(t); /* stack the char */ - break; - } - } -} - -/* - * output string directly, without pushing it for reparses. - */ -void -outputstr(const char *s) -{ - if (sp < 0) - reallyoutputstr(s); - else - while (*s) - CHRSAVE(*s++); -} - -void -reallyoutputstr(const char *s) -{ - if (synch_lines) { - while (*s) { - fputc(*s, active); - if (*s++ == '\n') { - infile[ilevel].synch_lineno++; - if (infile[ilevel].synch_lineno != - infile[ilevel].lineno) - do_emit_synchline(); - } - } - } else - fputs(s, active); -} - -void -reallyputchar(int c) -{ - putc(c, active); - if (synch_lines && c == '\n') { - infile[ilevel].synch_lineno++; - if (infile[ilevel].synch_lineno != infile[ilevel].lineno) - do_emit_synchline(); - } -} - -/* - * build an input token.. - * consider only those starting with _ or A-Za-z. - */ -static ndptr -inspect(int c, char *tp) -{ - char *name = tp; - char *etp = tp+MAXTOK; - ndptr p; - - *tp++ = c; - - while ((isalnum(c = gpbc()) || c == '_') && tp < etp) - *tp++ = c; - if (c != EOF) - PUSHBACK(c); - *tp = EOS; - /* token is too long, it won't match anything, but it can still - * be output. */ - if (tp == ep) { - outputstr(name); - while (isalnum(c = gpbc()) || c == '_') { - if (sp < 0) - reallyputchar(c); - else - CHRSAVE(c); - } - *name = EOS; - return NULL; - } - - p = ohash_find(¯os, ohash_qlookupi(¯os, name, (void *)&tp)); - if (p == NULL) - return NULL; - if (macro_getdef(p) == NULL) - return NULL; - return p; -} - -/* - * initkwds - initialise m4 keywords as fast as possible. - * This very similar to install, but without certain overheads, - * such as calling lookup. Malloc is not used for storing the - * keyword strings, since we simply use the static pointers - * within keywrds block. - */ -static void -initkwds(void) -{ - unsigned int type; - size_t i; - - for (i = 0; i < MAXKEYS; i++) { - type = keywrds[i].ktyp; - if ((keywrds[i].ktyp & NOARGS) == 0) - type |= NEEDARGS; - setup_builtin(keywrds[i].knam, type); - } -} - -static void -record(struct position *t, int lev) -{ - if (lev < MAXRECORD) { - t[lev].name = CURRENT_NAME; - t[lev].line = CURRENT_LINE; - } -} - -static void -dump_stack(struct position *t, int lev) -{ - int i; - - for (i = 0; i < lev; i++) { - if (i == MAXRECORD) { - fprintf(stderr, " ...\n"); - break; - } - fprintf(stderr, " %s at line %lu\n", - t[i].name, t[i].line); - } -} - - -static void -enlarge_stack(void) -{ - STACKMAX += STACKMAX/2; - mstack = xrealloc(mstack, sizeof(stae) * STACKMAX, - "Evaluation stack overflow (%lu)", - (unsigned long)STACKMAX); - sstack = xrealloc(sstack, STACKMAX, - "Evaluation stack overflow (%lu)", - (unsigned long)STACKMAX); -} - -static const struct { - const char *n; - const char *d; -} nd [] = { -{ "-d, --debug[=flags]", "set debug flags" }, -{ "-D, --define=name[=value]", "define macro" }, -{ "-e, --error-output=file", "send error output to file" }, -{ "-E, --fatal-warnings", "exit on warnings" }, -{ "-F, --freeze-state=file", "save state to file" }, -{ "-g, --gnu", "enable gnu extensions" }, -{ " --help", "print this message and exit" }, -{ "-I, --include=file", "include file" }, -{ "-i, --interactive", "unbuffer output, ignore tty signals" }, -{ "-L, --nesting-limit=num", "macro expansion nesting limit (unimpl)" }, -{ "-P, --prefix-builtins", "prefix builtins with m4_" }, -{ "-Q, --quiet", "don't print warnings" }, -{ "-R, --reload-state=file", "restore state from file" }, -{ "-Q, --silent", "don't print warnings" }, -{ "-s, --synclines", "output line directives for cpp(1)" }, -{ "-t, --trace=macro", "trace the named macro" }, -{ "-G, --traditional", "disable gnu extensions" }, -{ "-U, --undefine=name", "undefine the named macro" }, -{ "-v, --version", "print the version number and exit" }, -}; - -static void -help(void) -{ - size_t i; - fprintf(stdout, "%s version %d\n\n", getprogname(), VERSION); - usage(stdout); - - fprintf(stdout, "\nThe long options are:\n"); - for (i = 0; i < __arraycount(nd); i++) - fprintf(stdout, "\t%-25.25s\t%s\n", nd[i].n, nd[i].d); -} |