/*
* strings implementation for busybox
*
- * Copyright (c) 1980, 1987
- * The Regents of the University of California. All rights reserved.
+ * Copyright 2003 Tito Ragusa <farmatito@tiscali.it>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Original copyright notice is retained at the end of this file.
- *
- * Modified for BusyBox by Erik Andersen <andersee@debian.org>
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config STRINGS
+//config: bool "strings"
+//config: default y
+//config: help
+//config: strings prints the printable character sequences for each file
+//config: specified.
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <getopt.h>
-#include <unistd.h>
-#include <ctype.h>
-#include "busybox.h"
+//applet:IF_STRINGS(APPLET(strings, BB_DIR_USR_BIN, BB_SUID_DROP))
-#define ISSTR(ch) (isprint(ch) || ch == '\t')
+//kbuild:lib-$(CONFIG_STRINGS) += strings.o
-int strings_main(int argc, char **argv)
-{
- extern char *optarg;
- extern int optind;
- int ch, cnt;
- int exitcode;
- int oflg, fflg;
- char *file;
- size_t foff, minlen;
- unsigned char *bfr, *C;
+//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"
- exitcode = fflg = oflg = 0;
- minlen = -1;
- while ((ch = getopt(argc, argv, "an:of")) > 0)
- switch(ch) {
- case 'a':
- break;
- case 'f':
- fflg = 1;
- break;
- case 'n':
- minlen = atoi(optarg);
- break;
- case 'o':
- oflg = 1;
- break;
- default:
- show_usage();
- }
- argc -= optind;
+#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;
- if (minlen == -1)
- minlen = 4;
+ 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;
+ }
- bfr = xmalloc(minlen);
- bfr[minlen] = '\0';
- file = "stdin";
do {
- if (*argv) {
- fprintf(stderr, "opening '%s'\n", *argv);
- file = *argv++;
- if (!freopen(file, "r", stdin)) {
- perror_msg("%s", file);
- exitcode = EXIT_FAILURE;
- continue;
- }
+ file = fopen_or_warn_stdin(*argv);
+ if (!file) {
+ status = EXIT_FAILURE;
+ continue;
}
- foff = 0;
-
- for (cnt = 0; (ch = getchar()) != EOF;) {
- foff++;
- if (ISSTR(ch)) {
- if (!cnt)
- C = bfr;
- *C++ = ch;
- if (++cnt < minlen)
- continue;
- if (fflg)
- printf("%s:", file);
- if (oflg)
- printf("%7ld %s", (long)(foff - minlen), (char *)bfr);
- else
- printf("%s", bfr);
- while ((ch = getchar()) != EOF && ISSTR(ch))
- putchar((char)ch);
- putchar('\n');
+ 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(string, stdout);
+ }
+ count++;
+ }
+ } else {
+ if (count > n) {
+ bb_putchar('\n');
+ }
+ count = 0;
}
- cnt = 0;
- }
- } while (*argv);
- exit(exitcode);
-}
+ offset++;
+ } while (c != EOF);
+ fclose_if_not_stdin(file);
+ } while (*++argv);
-/*
- * Copyright (c) 1980, 1987
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
- * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
- *
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(string);
+ free(radix_fmt);
+ }
+
+ fflush_stdout_and_exit(status);
+}
projects / oweals / busybox.git / blobdiff