1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * strings implementation for busybox
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4 | *
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5 | * Copyright (c) 1980, 1987
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6 | * The Regents of the University of California. All rights reserved.
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7 | *
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8 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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9 | *
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10 | * Original copyright notice is retained at the end of this file.
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11 | *
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12 | * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
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13 | * Badly hacked by Tito Ragusa <farmatito@tiscali.it>
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14 | */
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15 |
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16 | #include "busybox.h"
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17 | #include <stdio.h>
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18 | #include <stdlib.h>
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19 | #include <getopt.h>
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20 | #include <ctype.h>
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21 |
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22 | #define WHOLE_FILE 1
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23 | #define PRINT_NAME 2
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24 | #define PRINT_OFFSET 4
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25 | #define SIZE 8
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26 |
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27 | int strings_main(int argc, char **argv)
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28 | {
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29 | int n, c, i = 0, status = EXIT_SUCCESS;
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30 | unsigned long opt;
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31 | unsigned long count;
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32 | FILE *file = stdin;
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33 | char *string;
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34 | const char *fmt = "%s: ";
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35 | char *n_arg = "4";
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36 |
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37 | opt = bb_getopt_ulflags(argc, argv, "afon:", &n_arg);
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38 | /* -a is our default behaviour */
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39 |
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40 | argc -= optind;
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41 | argv += optind;
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42 |
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43 | n = bb_xgetlarg(n_arg, 10, 1, INT_MAX);
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44 | string = xzalloc(n + 1);
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45 | n--;
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46 |
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47 | if (argc == 0) {
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48 | fmt = "{%s}: ";
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49 | *argv = (char *)bb_msg_standard_input;
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50 | goto PIPE;
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51 | }
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52 |
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53 | do {
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54 | if ((file = bb_wfopen(*argv, "r"))) {
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55 | PIPE:
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56 | count = 0;
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57 | do {
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58 | c = fgetc(file);
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59 | if (isprint(c) || c == '\t') {
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60 | if (i <= n) {
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61 | string[i] = c;
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62 | } else {
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63 | putchar(c);
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64 | }
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65 | if (i == n) {
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66 | if (opt & PRINT_NAME) {
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67 | printf(fmt, *argv);
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68 | }
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69 | if (opt & PRINT_OFFSET) {
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70 | printf("%7lo ", count - n);
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71 | }
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72 | printf("%s", string);
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73 | }
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74 | i++;
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75 | } else {
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76 | if (i > n) {
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77 | putchar('\n');
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78 | }
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79 | i = 0;
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80 | }
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81 | count++;
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82 | } while (c != EOF);
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83 | bb_fclose_nonstdin(file);
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84 | } else {
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85 | status = EXIT_FAILURE;
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86 | }
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87 | } while (--argc > 0);
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88 |
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89 | if (ENABLE_FEATURE_CLEAN_UP)
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90 | free(string);
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91 |
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92 | bb_fflush_stdout_and_exit(status);
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93 | }
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94 |
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95 | /*
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96 | * Copyright (c) 1980, 1987
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97 | * The Regents of the University of California. All rights reserved.
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98 | *
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99 | * Redistribution and use in source and binary forms, with or without
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100 | * modification, are permitted provided that the following conditions
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101 | * are met:
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102 | * 1. Redistributions of source code must retain the above copyright
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103 | * notice, this list of conditions and the following disclaimer.
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104 | * 2. Redistributions in binary form must reproduce the above copyright
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105 | * notice, this list of conditions and the following disclaimer in the
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106 | * documentation and/or other materials provided with the distribution.
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107 | *
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108 | * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
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109 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
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110 | *
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111 | * 4. Neither the name of the University nor the names of its contributors
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112 | * may be used to endorse or promote products derived from this software
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113 | * without specific prior written permission.
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114 | *
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115 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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116 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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117 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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118 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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119 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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120 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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121 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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122 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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123 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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124 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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125 | * SUCH DAMAGE.
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126 | */
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