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/* 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: "\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);
}
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