69312e87b0
v2: minor code cleanup, no changes.
v1: Implement -t radix option.
Fix help text for -o option.
Signed-off-by: Tito Ragusa <farmatito@tiscali.it>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* strings implementation for busybox
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*
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* Copyright 2003 Tito Ragusa <farmatito@tiscali.it>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//usage:#define strings_trivial_usage
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//usage: "[-fo] [-t o/d/x] [-n LEN] [FILE]..."
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//usage:#define strings_full_usage "\n\n"
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//usage: "Display printable strings in a binary file\n"
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//We usually don't bother user with "nop" options. They work, but are not shown:
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////usage: "\n -a Scan whole file (default)"
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//unimplemented alternative is -d: Only strings from initialized, loaded data sections
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//usage: "\n -f Precede strings with filenames"
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//usage: "\n -o Precede strings with octal offsets"
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//usage: "\n -t o/d/x Precede strings with offsets in base 8/10/16"
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//usage: "\n -n LEN At least LEN characters form a string (default 4)"
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#include "libbb.h"
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#define WHOLE_FILE 1
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#define PRINT_NAME 2
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#define PRINT_OFFSET 4
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#define SIZE 8
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#define PRINT_RADIX 16
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int strings_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int strings_main(int argc UNUSED_PARAM, char **argv)
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{
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int n, c, status = EXIT_SUCCESS;
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unsigned count;
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off_t offset;
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FILE *file;
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char *string;
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const char *fmt = "%s: ";
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const char *n_arg = "4";
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/* default for -o */
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const char *radix = "o";
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char *radix_fmt;
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getopt32(argv, "afon:t:", &n_arg, &radix);
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/* -a is our default behaviour */
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/*argc -= optind;*/
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argv += optind;
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n = xatou_range(n_arg, 1, INT_MAX);
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string = xzalloc(n + 1);
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n--;
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if ((radix[0] != 'd' && radix[0] != 'o' && radix[0] != 'x') || radix[1] != 0)
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bb_show_usage();
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radix_fmt = xasprintf("%%7"OFF_FMT"%s ", radix);
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if (!*argv) {
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fmt = "{%s}: ";
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*--argv = (char *)bb_msg_standard_input;
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}
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do {
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file = fopen_or_warn_stdin(*argv);
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if (!file) {
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status = EXIT_FAILURE;
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continue;
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}
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offset = 0;
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count = 0;
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do {
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c = fgetc(file);
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if (isprint_asciionly(c) || c == '\t') {
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if (count > n) {
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bb_putchar(c);
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} else {
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string[count] = c;
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if (count == n) {
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if (option_mask32 & PRINT_NAME) {
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printf(fmt, *argv);
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}
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if (option_mask32 & (PRINT_OFFSET | PRINT_RADIX)) {
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printf(radix_fmt, offset - n);
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}
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fputs(string, stdout);
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}
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count++;
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}
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} else {
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if (count > n) {
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bb_putchar('\n');
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}
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count = 0;
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}
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offset++;
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} while (c != EOF);
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fclose_if_not_stdin(file);
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} while (*++argv);
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if (ENABLE_FEATURE_CLEAN_UP) {
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free(string);
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free(radix_fmt);
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}
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fflush_stdout_and_exit(status);
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}
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