| /* vi: set sw=4 ts=4: */ |
| /* |
| * strings implementation for busybox |
| * |
| * Copyright 2003 Tito Ragusa <farmatito@tiscali.it> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| |
| //usage:#define strings_trivial_usage |
| //usage: "[-afo] [-n LEN] [FILE]..." |
| //usage:#define strings_full_usage "\n\n" |
| //usage: "Display printable strings in a binary file\n" |
| //usage: "\nOptions:" |
| //usage: "\n -a Scan whole file (default)" |
| //usage: "\n -f Precede strings with filenames" |
| //usage: "\n -n LEN At least LEN characters form a string (default 4)" |
| //usage: "\n -o Precede strings with decimal offsets" |
| |
| #include "libbb.h" |
| |
| #define WHOLE_FILE 1 |
| #define PRINT_NAME 2 |
| #define PRINT_OFFSET 4 |
| #define SIZE 8 |
| |
| int strings_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int strings_main(int argc UNUSED_PARAM, char **argv) |
| { |
| int n, c, status = EXIT_SUCCESS; |
| unsigned count; |
| off_t offset; |
| FILE *file; |
| char *string; |
| const char *fmt = "%s: "; |
| const char *n_arg = "4"; |
| |
| getopt32(argv, "afon:", &n_arg); |
| /* -a is our default behaviour */ |
| /*argc -= optind;*/ |
| argv += optind; |
| |
| n = xatou_range(n_arg, 1, INT_MAX); |
| string = xzalloc(n + 1); |
| n--; |
| |
| if (!*argv) { |
| fmt = "{%s}: "; |
| *--argv = (char *)bb_msg_standard_input; |
| } |
| |
| do { |
| file = fopen_or_warn_stdin(*argv); |
| if (!file) { |
| status = EXIT_FAILURE; |
| continue; |
| } |
| offset = 0; |
| count = 0; |
| do { |
| c = fgetc(file); |
| if (isprint_asciionly(c) || c == '\t') { |
| if (count > n) { |
| bb_putchar(c); |
| } else { |
| string[count] = c; |
| if (count == n) { |
| if (option_mask32 & PRINT_NAME) { |
| printf(fmt, *argv); |
| } |
| if (option_mask32 & PRINT_OFFSET) { |
| printf("%7"OFF_FMT"o ", offset - n); |
| } |
| fputs(string, stdout); |
| } |
| count++; |
| } |
| } else { |
| if (count > n) { |
| bb_putchar('\n'); |
| } |
| count = 0; |
| } |
| offset++; |
| } while (c != EOF); |
| fclose_if_not_stdin(file); |
| } while (*++argv); |
| |
| if (ENABLE_FEATURE_CLEAN_UP) |
| free(string); |
| |
| fflush_stdout_and_exit(status); |
| } |