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183 lines
3.9 KiB
C
183 lines
3.9 KiB
C
/*
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* Mini sed implementation for busybox
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*
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*
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* Copyright (C) 1999 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include "regexp.h"
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#include <stdio.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <time.h>
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#include <ctype.h>
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static const char sed_usage[] =
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"sed [-n] [-e script] [file...]\n\n"
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"Allowed sed scripts come in the following form:\n"
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"\t's/regexp/replacement/[gp]'\n"
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"which attempt to match regexp against the pattern space\n"
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"and if successful replaces the matched portion with replacement.\n\n"
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"Options:\n"
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"-e\tadd the script to the commands to be executed\n"
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"-n\tsuppress automatic printing of pattern space\n\n"
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#if defined BB_REGEXP
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"This version of sed matches full regular expresions.\n";
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#else
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"This version of sed matches strings (not full regular expresions).\n";
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#endif
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static void do_sed(FILE *fp, char *needle, char *newNeedle, int ignoreCase, int printFlag, int quietFlag)
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{
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int foundOne=FALSE;
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char haystack[1024];
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while (fgets (haystack, 1023, fp)) {
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foundOne = replace_match(haystack, needle, newNeedle, ignoreCase);
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if (foundOne==TRUE && printFlag==TRUE) {
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fprintf(stdout, haystack);
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}
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if (quietFlag==FALSE) {
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fprintf(stdout, haystack);
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}
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}
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}
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extern int sed_main (int argc, char **argv)
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{
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FILE *fp;
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char *needle=NULL, *newNeedle=NULL;
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char *name;
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char *cp;
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int ignoreCase=FALSE;
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int printFlag=FALSE;
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int quietFlag=FALSE;
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int stopNow;
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argc--;
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argv++;
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if (argc < 1) {
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usage(sed_usage);
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}
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if (**argv == '-') {
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argc--;
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cp = *argv++;
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stopNow=FALSE;
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while (*++cp && stopNow==FALSE) {
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switch (*cp) {
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case 'n':
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quietFlag = TRUE;
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break;
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case 'e':
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if (*(cp+1)==0 && --argc < 0) {
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usage( sed_usage);
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}
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if ( *++cp != 's')
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cp = *argv++;
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while( *cp ) {
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if (*cp == 's' && strlen(cp) > 3 && *(cp+1) == '/') {
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char* pos=needle=cp+2;
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for(;;) {
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pos = strchr(pos, '/');
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if (pos==NULL) {
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usage( sed_usage);
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}
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if (*(pos-1) == '\\') {
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pos++;
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continue;
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}
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break;
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}
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*pos=0;
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newNeedle=++pos;
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for(;;) {
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pos = strchr(pos, '/');
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if (pos==NULL) {
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usage( sed_usage);
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}
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if (*(pos-1) == '\\') {
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pos++;
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continue;
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}
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break;
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}
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*pos=0;
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if (pos+2 != 0) {
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while (*++pos) {
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switch (*pos) {
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case 'i':
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ignoreCase=TRUE;
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break;
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case 'p':
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printFlag=TRUE;
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break;
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case 'g':
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break;
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default:
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usage( sed_usage);
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}
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}
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}
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}
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cp++;
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}
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//fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle);
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stopNow=TRUE;
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break;
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default:
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usage(sed_usage);
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}
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}
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}
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if (argc==0) {
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do_sed( stdin, needle, newNeedle, ignoreCase, printFlag, quietFlag);
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} else {
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while (argc-- > 0) {
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name = *argv++;
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fp = fopen (name, "r");
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if (fp == NULL) {
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perror (name);
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continue;
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}
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do_sed( fp, needle, newNeedle, ignoreCase, printFlag, quietFlag);
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if (ferror (fp))
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perror (name);
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fclose (fp);
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}
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}
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exit( TRUE);
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}
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/* END CODE */
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