117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/* 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.
|
|
*/
|
|
//config:config STRINGS
|
|
//config: bool "strings (4.6 kb)"
|
|
//config: default y
|
|
//config: help
|
|
//config: strings prints the printable character sequences for each file
|
|
//config: specified.
|
|
|
|
//applet:IF_STRINGS(APPLET(strings, BB_DIR_USR_BIN, BB_SUID_DROP))
|
|
|
|
//kbuild:lib-$(CONFIG_STRINGS) += strings.o
|
|
|
|
//usage:#define strings_trivial_usage
|
|
//usage: "[-fo] [-t o|d|x] [-n LEN] [FILE]..."
|
|
//usage:#define strings_full_usage "\n\n"
|
|
//usage: "Display printable strings in a binary file\n"
|
|
//We usually don't bother user with "nop" options. They work, but are not shown:
|
|
////usage: "\n -a Scan whole file (default)"
|
|
//unimplemented alternative is -d: Only strings from initialized, loaded data sections
|
|
//usage: "\n -f Precede strings with filenames"
|
|
//usage: "\n -o Precede strings with octal offsets"
|
|
//usage: "\n -t o|d|x Precede strings with offsets in base 8/10/16"
|
|
//usage: "\n -n LEN At least LEN characters form a string (default 4)"
|
|
|
|
#include "libbb.h"
|
|
|
|
#define WHOLE_FILE 1
|
|
#define PRINT_NAME 2
|
|
#define PRINT_OFFSET 4
|
|
#define SIZE 8
|
|
#define PRINT_RADIX 16
|
|
|
|
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";
|
|
/* default for -o */
|
|
const char *radix = "o";
|
|
char *radix_fmt;
|
|
|
|
getopt32(argv, "afon:t:", &n_arg, &radix);
|
|
/* -a is our default behaviour */
|
|
/*argc -= optind;*/
|
|
argv += optind;
|
|
|
|
n = xatou_range(n_arg, 1, INT_MAX);
|
|
string = xzalloc(n + 1);
|
|
n--;
|
|
|
|
if ((radix[0] != 'd' && radix[0] != 'o' && radix[0] != 'x') || radix[1] != 0)
|
|
bb_show_usage();
|
|
|
|
radix_fmt = xasprintf("%%7"OFF_FMT"%s ", radix);
|
|
|
|
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 | PRINT_RADIX)) {
|
|
printf(radix_fmt, offset - n);
|
|
}
|
|
fputs_stdout(string);
|
|
}
|
|
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);
|
|
free(radix_fmt);
|
|
}
|
|
|
|
fflush_stdout_and_exit(status);
|
|
}
|