/* vi: set sw=4 ts=4: */ /* * Mini grep implementation for busybox * * * Copyright (C) 1999,2000 by Lineo, inc. * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ /* 18-Dec-1999 Konstantin Boldyshev <konst@voshod.com> + -q option (be quiet) + exit code depending on grep result (TRUE or FALSE) (useful for scripts) */ #include "internal.h" #include "regexp.h" #include <stdio.h> #include <dirent.h> #include <errno.h> #include <fcntl.h> #include <signal.h> #include <time.h> #include <ctype.h> static const char grep_usage[] = "grep [OPTIONS]... PATTERN [FILE]...\n\n" "Search for PATTERN in each FILE or standard input.\n\n" "OPTIONS:\n" "\t-h\tsuppress the prefixing filename on output\n" "\t-i\tignore case distinctions\n" "\t-n\tprint line number with output lines\n" "\t-q\tbe quiet. Returns 0 if result was found, 1 otherwise\n" "\t-v\tselect non-matching lines\n\n" #if defined BB_REGEXP "This version of grep matches full regular expresions.\n"; #else "This version of grep matches strings (not regular expresions).\n"; #endif static int match = FALSE, beQuiet = FALSE; static void do_grep(FILE * fp, char *needle, char *fileName, int tellName, int ignoreCase, int tellLine, int invertSearch) { char *cp; long line = 0; char haystack[BUF_SIZE]; int truth = !invertSearch; while (fgets(haystack, sizeof(haystack), fp)) { line++; cp = &haystack[strlen(haystack) - 1]; if (*cp != '\n') fprintf(stderr, "%s: Line too long\n", fileName); if (find_match(haystack, needle, ignoreCase) == truth) { if (tellName == TRUE) printf("%s:", fileName); if (tellLine == TRUE) printf("%ld:", line); if (beQuiet == FALSE) fputs(haystack, stdout); match = TRUE; } } } extern int grep_main(int argc, char **argv) { FILE *fp; char *cp; char *needle; char *fileName; int tellName = TRUE; int ignoreCase = FALSE; int tellLine = FALSE; int invertSearch = FALSE; argc--; argv++; if (argc < 1) { usage(grep_usage); } if (**argv == '-') { argc--; cp = *argv++; while (*++cp) switch (*cp) { case 'i': ignoreCase = TRUE; break; case 'h': tellName = FALSE; break; case 'n': tellLine = TRUE; break; case 'q': beQuiet = TRUE; break; case 'v': invertSearch = TRUE; break; default: usage(grep_usage); } } needle = *argv++; argc--; if (argc == 0) { do_grep(stdin, needle, "stdin", FALSE, ignoreCase, tellLine, invertSearch); } else { /* Never print the filename for just one file */ if (argc == 1) tellName = FALSE; while (argc-- > 0) { fileName = *argv++; fp = fopen(fileName, "r"); if (fp == NULL) { perror(fileName); continue; } do_grep(fp, needle, fileName, tellName, ignoreCase, tellLine, invertSearch); if (ferror(fp)) perror(fileName); fclose(fp); } } exit(match); } /* END CODE */