/* vi: set sw=4 ts=4: */ /* * cut implementation for busybox * * Copyright (c) Michael J. Holme * * This version of cut is adapted from Minix cut and was modified * by Erik Andersen to be used in busybox. * * 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 * * Original copyright notice is retained at the end of this file. */ #include "internal.h" #include #include #include #include #include #include #define BB_DECLARE_EXTERN #define bb_need_help #include "messages.c" #define MAX_FIELD 80 /* Pointers to the beginning of each field * are stored in columns[], if a line holds * more than MAX_FIELD columns the array * boundary is exceed. But unlikely at 80 */ #define MAX_ARGS 32 /* Maximum number of fields following -f or * -c switches */ int args[MAX_ARGS * 2]; int num_args; /* Lots of new defines, should easen maintainance... */ #define DUMP_STDIN 0 /* define for mode: no options */ #define OPTIONF 1 /* define for mode: option -f */ #define OPTIONC 2 /* define for mode: option -c */ #define OPTIONB 3 /* define for mode: option -b */ #define NOTSET 0 /* option not selected */ #define SET 1 /* option selected */ /* Defines for the warnings */ #define DELIMITER_NOT_APPLICABLE 0 #define OVERRIDING_PREVIOUS_MODE 1 #define OPTION_NOT_APPLICABLE 2 #define UNKNOWN_OPTION 3 #define FILE_NOT_READABLE 4 /* Defines for the fatal errors */ #define SYNTAX_ERROR 101 #define POSITION_ERROR 102 #define LINE_TO_LONG_ERROR 103 #define RANGE_ERROR 104 #define MAX_FIELDS_EXEEDED_ERROR 105 #define MAX_ARGS_EXEEDED_ERROR 106 int mode; /* 0 = dump stdin to stdout, 1=-f, 2=-c */ char delim = '\t'; /* default delimiting character */ FILE *fd; char *name; char line[BUFSIZ]; int exit_status; int cut_main(int argc, char **argv); void warn(int warn_number, char *option); void cuterror(int err); void get_args(void); void cut(void); void warn(int warn_number, char *option) { static char *warn_msg[] = { "%s: Option -d allowed only with -f\n", "%s: -%s overrides earlier option\n", "%s: -%s not allowed in current mode\n", "%s: Cannot open %s\n" }; fprintf(stderr, warn_msg[warn_number], name, option); exit_status = warn_number + 1; } void cuterror(int err) { static char *err_mes[] = { "%s: syntax error\n", "%s: position must be >0\n", "%s: line longer than BUFSIZ\n", "%s: range must not decrease from left to right\n", "%s: MAX_FIELD exceeded\n", "%s: MAX_ARGS exceeded\n" }; fprintf(stderr, err_mes[err - 101], name); exit(err); } void get_args() { int i = 0; int arg_ptr = 0; int flag; num_args = 0; do { if (num_args == MAX_ARGS) cuterror(MAX_ARGS_EXEEDED_ERROR); if (!isdigit(line[i]) && line[i] != '-') cuterror(SYNTAX_ERROR); args[arg_ptr] = 1; args[arg_ptr + 1] = BUFSIZ; flag = 1; while (line[i] != ',' && line[i] != 0) { if (isdigit(line[i])) { args[arg_ptr] = 0; while (isdigit(line[i])) args[arg_ptr] = 10 * args[arg_ptr] + line[i++] - '0'; if (!args[arg_ptr]) cuterror(POSITION_ERROR); arg_ptr++; } if (line[i] == '-') { arg_ptr |= 1; i++; flag = 0; } } if (flag && arg_ptr & 1) args[arg_ptr] = args[arg_ptr - 1]; if (args[num_args * 2] > args[num_args * 2 + 1]) cuterror(RANGE_ERROR); num_args++; arg_ptr = num_args * 2; } while (line[i++]); } void cut() { int i, j, length, maxcol=0; char *columns[MAX_FIELD]; while (fgets(line, BUFSIZ, fd)) { length = strlen(line) - 1; *(line + length) = 0; switch (mode) { case DUMP_STDIN: printf("%s", line); break; case OPTIONF: columns[maxcol++] = line; for (i = 0; i < length; i++) { if (*(line + i) == delim) { *(line + i) = 0; if (maxcol == MAX_FIELD) cuterror(MAX_FIELDS_EXEEDED_ERROR); columns[maxcol] = line + i + 1; maxcol++; } } if (maxcol != 1) { for (i = 0; i < num_args; i++) { for (j = args[i * 2]; j <= args[i * 2 + 1]; j++) if (j <= maxcol) { printf("%s", columns[j - 1]); if (i != num_args - 1 || j != args[i * 2 + 1]) putchar(delim); } } } break; case OPTIONC: for (i = 0; i < num_args; i++) { for (j = args[i * 2]; j <= (args[i * 2 + 1] > length ? length : args[i * 2 + 1]); j++) putchar(*(line + j - 1)); } } if (maxcol != 1) putchar('\n'); } } int cut_main(int argc, char **argv) { int i = 1; int numberFilenames = 0; name = argv[0]; if (argc == 1 || strcmp(argv[1], dash_dash_help)==0) usage( "cut [OPTION]... [FILE]...\n" #ifndef BB_FEATURE_TRIVIAL_HELP "\nPrints selected fields from each input FILE to standard output.\n\n" "Options:\n" "\t-b LIST\tOutput only bytes from LIST\n" "\t-c LIST\tOutput only characters from LIST\n" "\t-d DELIM\tUse DELIM instead of tab as the field delimiter\n" "\t-f N\tPrint only these fields\n" "\t-n\tIgnored\n" #endif ); while (i < argc) { if (argv[i][0] == '-') { switch (argv[i++][1]) { case 'd': if (mode == OPTIONC || mode == OPTIONB) warn(DELIMITER_NOT_APPLICABLE, "d"); delim = argv[i++][0]; break; case 'f': sprintf(line, "%s", argv[i++]); if (mode == OPTIONC || mode == OPTIONB) warn(OVERRIDING_PREVIOUS_MODE, "f"); mode = OPTIONF; break; case 'b': sprintf(line, "%s", argv[i++]); if (mode == OPTIONF || mode == OPTIONC) warn(OVERRIDING_PREVIOUS_MODE, "b"); mode = OPTIONB; break; case 'c': sprintf(line, "%s", argv[i++]); if (mode == OPTIONF || mode == OPTIONB) warn(OVERRIDING_PREVIOUS_MODE, "c"); mode = OPTIONC; break; case '\0': /* - means: read from stdin */ numberFilenames++; break; case 'n': /* needed for Posix, but no effect here */ if (mode != OPTIONB) warn(OPTION_NOT_APPLICABLE, "n"); break; default: warn(UNKNOWN_OPTION, &(argv[i - 1][1])); } } else { i++; numberFilenames++; } } /* Here follow the checks, if the selected options are reasonable. */ if (mode == OPTIONB) /* since in Minix char := byte */ mode = OPTIONC; get_args(); if (numberFilenames != 0) { i = 1; while (i < argc) { if (argv[i][0] == '-') { switch (argv[i][1]) { case 'f': case 'c': case 'b': case 'd': i += 2; break; case 'n': case 'i': case 's': i++; break; case '\0': fd = stdin; i++; cut(); break; default: i++; } } else { if ((fd = fopen(argv[i++], "r")) == NULL) { warn(FILE_NOT_READABLE, argv[i - 1]); } else { cut(); fclose(fd); } } } } else { fd = stdin; cut(); } return(exit_status); } /* cut - extract columns from a file or stdin. Author: Michael J. Holme * * Copyright 1989, Michael John Holme, All rights reserved. * This code may be freely distributed, provided that this notice * remains intact. * * V1.1: 6th September 1989 * * Bugs, criticisms, etc, * c/o Mark Powell * JANET sq79@uk.ac.liv * ARPA sq79%liv.ac.uk@nsfnet-relay.ac.uk * UUCP ...!mcvax!ukc!liv.ac.uk!sq79 *------------------------------------------------------------------------- * Changed for POSIX1003.2/Draft10 conformance * Thomas Brupbacher (tobr@mw.lpc.ethz.ch), September 1990. * Changes: * - separation of error messages ( stderr) and output (stdout). * - support for -b and -n (no effect, -b acts as -c) * - support for -s *------------------------------------------------------------------------- */ /* * Copyright (c) 1987,1997, Prentice Hall * All rights reserved. * * Redistribution and use of the MINIX operating system in source and * binary forms, with or without modification, are permitted provided * that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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. * * Neither the name of Prentice Hall nor the names of the software * authors or contributors may be used to endorse or promote * products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, 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 PRENTICE HALL OR ANY AUTHORS 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. * */