254 lines
6.1 KiB
C
254 lines
6.1 KiB
C
/****************************************************************
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Copyright (C) Lucent Technologies 1997
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name Lucent Technologies or any of
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its entities not be used in advertising or publicity pertaining
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to distribution of the software without specific, written prior
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permission.
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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****************************************************************/
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const char *version = "version 20100523";
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#define DEBUG
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#include <stdio.h>
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#include <ctype.h>
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#include <locale.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include "awk.h"
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#include "awkgram.h"
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extern char **environ;
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extern int nfields;
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int dbg = 0;
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unsigned int srand_seed;
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char *cmdname; /* gets argv[0] for error messages */
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extern FILE *yyin; /* lex input file */
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char *lexprog; /* points to program argument if it exists */
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extern int errorflag; /* non-zero if any syntax errors; set by yyerror */
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int compile_time = 2; /* for error printing: */
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/* 2 = cmdline, 1 = compile, 0 = running */
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static char **pfile = NULL; /* program filenames from -f's */
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static size_t maxpfile = 0; /* max program filenames */
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static size_t npfile = 0; /* number of filenames */
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static size_t curpfile = 0; /* current filename */
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int safe = 0; /* 1 => "safe" mode */
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static char *
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setfs(char *p)
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{
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#ifdef notdef
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/* wart: t=>\t */
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if (p[0] == 't' && p[1] == 0)
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return "\t";
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else
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#endif
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if (p[0] != 0)
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return p;
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return NULL;
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}
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__dead static void fpecatch(int n
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#ifdef SA_SIGINFO
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, siginfo_t *si, void *uc
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#endif
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)
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{
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#ifdef SA_SIGINFO
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static const char *emsg[] = {
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"Unknown error",
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"Integer divide by zero",
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"Integer overflow",
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"Floating point divide by zero",
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"Floating point overflow",
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"Floating point underflow",
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"Floating point inexact result",
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"Invalid Floating point operation",
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"Subscript out of range",
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};
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#endif
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FATAL("floating point exception"
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#ifdef SA_SIGINFO
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": %s\n", emsg[si->si_code >= 1 && si->si_code <= 8 ?
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si->si_code : 0]
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#endif
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);
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}
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int main(int argc, char *argv[])
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{
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const char *fs = NULL;
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setlocale(LC_ALL, "");
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setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */
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cmdname = argv[0];
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if (argc == 1) {
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fprintf(stderr,
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"usage: %s [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]\n",
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cmdname);
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exit(1);
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}
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#ifdef SA_SIGINFO
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{
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struct sigaction sa;
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sa.sa_sigaction = fpecatch;
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sa.sa_flags = SA_SIGINFO;
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sigemptyset(&sa.sa_mask);
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(void)sigaction(SIGFPE, &sa, NULL);
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}
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#else
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(void)signal(SIGFPE, fpecatch);
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#endif
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/* Set and keep track of the random seed */
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srand_seed = 1;
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srand(srand_seed);
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yyin = NULL;
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symtab = makesymtab(NSYMTAB/NSYMTAB);
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while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') {
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if (strcmp(argv[1],"-version") == 0 || strcmp(argv[1],"--version") == 0) {
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printf("awk %s\n", version);
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exit(0);
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break;
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}
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if (strncmp(argv[1], "--", 2) == 0) { /* explicit end of args */
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argc--;
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argv++;
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break;
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}
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switch (argv[1][1]) {
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case 's':
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if (strcmp(argv[1], "-safe") == 0)
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safe = 1;
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break;
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case 'f': /* next argument is program filename */
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argc--;
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argv++;
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if (argc <= 1)
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FATAL("no program filename");
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if (npfile >= maxpfile) {
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maxpfile += 20;
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pfile = realloc(pfile,
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maxpfile * sizeof(*pfile));
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if (pfile == NULL)
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FATAL("error allocating space for "
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"-f options");
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}
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pfile[npfile++] = argv[1];
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break;
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case 'F': /* set field separator */
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if (argv[1][2] != 0) { /* arg is -Fsomething */
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fs = setfs(argv[1] + 2);
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} else { /* arg is -F something */
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argc--; argv++;
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if (argc > 1)
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fs = setfs(argv[1]);
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}
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if (fs == NULL || *fs == '\0')
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WARNING("field separator FS is empty");
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break;
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case 'v': /* -v a=1 to be done NOW. one -v for each */
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if (argv[1][2] == '\0' && --argc > 1 && isclvar((++argv)[1]))
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setclvar(argv[1]);
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else if (argv[1][2] != '\0')
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setclvar(&argv[1][2]);
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break;
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case 'd':
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dbg = atoi(&argv[1][2]);
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if (dbg == 0)
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dbg = 1;
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printf("awk %s\n", version);
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break;
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default:
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WARNING("unknown option %s ignored", argv[1]);
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break;
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}
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argc--;
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argv++;
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}
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/* argv[1] is now the first argument */
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if (npfile == 0) { /* no -f; first argument is program */
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if (argc <= 1) {
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if (dbg)
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exit(0);
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FATAL("no program given");
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}
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dprintf( ("program = |%s|\n", argv[1]) );
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lexprog = argv[1];
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argc--;
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argv++;
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}
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recinit(recsize);
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syminit();
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compile_time = 1;
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argv[0] = cmdname; /* put prog name at front of arglist */
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dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) );
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arginit(argc, argv);
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if (!safe)
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envinit(environ);
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yyparse();
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if (fs)
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*FS = qstring(fs, '\0');
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dprintf( ("errorflag=%d\n", errorflag) );
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if (errorflag == 0) {
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compile_time = 0;
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run(winner);
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} else
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bracecheck();
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return(errorflag);
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}
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int pgetc(void) /* get 1 character from awk program */
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{
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int c;
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for (;;) {
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if (yyin == NULL) {
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if (curpfile >= npfile)
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return EOF;
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if (strcmp(pfile[curpfile], "-") == 0)
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yyin = stdin;
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else if ((yyin = fopen(pfile[curpfile], "r")) == NULL)
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FATAL("can't open file %s", pfile[curpfile]);
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lineno = 1;
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}
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if ((c = getc(yyin)) != EOF)
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return c;
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if (yyin != stdin)
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fclose(yyin);
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yyin = NULL;
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curpfile++;
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}
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}
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char *cursource(void) /* current source file name */
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{
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if (npfile > 0)
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return pfile[curpfile];
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else
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return NULL;
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}
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