/*
* 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 <andersen@codepoet.org>
- * Badly hacked by Tito Ragusa <farmatito@tiscali.it>
+ * 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.
+
+//applet:IF_STRINGS(APPLET(strings, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_STRINGS) += strings.o
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <getopt.h>
-#include <unistd.h>
-#include <ctype.h>
-#include "busybox.h"
+//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)"
-#define ISSTR(ch) (isprint(ch) || ch == '\t')
+#include "libbb.h"
-int strings_main(int argc, char **argv)
+#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=4, c, i, opt=0, a=0, status=EXIT_SUCCESS;
- long t=0, count;
+ int n, c, status = EXIT_SUCCESS;
+ unsigned count;
+ off_t offset;
FILE *file;
- char *string=NULL;
-
- while ((i = getopt(argc, argv, "afon:")) > 0)
- switch(i)
- {
- case 'a':
- break;
- case 'f':
- opt+=1;
- break;
- case 'o':
- opt+=2;
- break;
- case 'n':
- n = bb_xgetlarg(optarg, 10, 1, INT_MAX);
- break;
- default:
- bb_show_usage();
- }
+ char *string;
+ const char *fmt = "%s: ";
+ const char *n_arg = "4";
+ /* default for -o */
+ const char *radix = "o";
+ char *radix_fmt;
- argc -= optind;
+ getopt32(argv, "afon:t:", &n_arg, &radix);
+ /* -a is our default behaviour */
+ /*argc -= optind;*/
argv += optind;
- i=0;
+ n = xatou_range(n_arg, 1, INT_MAX);
+ string = xzalloc(n + 1);
+ n--;
- string=xmalloc(n+1);
- string[n]='\0';
- n-=1;
+ if ((radix[0] != 'd' && radix[0] != 'o' && radix[0] != 'x') || radix[1] != 0)
+ bb_show_usage();
- if(!argc )
- {
- file = stdin;
- goto pipe;
- }
+ radix_fmt = xasprintf("%%7"OFF_FMT"%s ", radix);
- for(a=0;a<argc;a++)
- {
- if((file=fopen(argv[a],"r")))
- {
-pipe:
+ if (!*argv) {
+ fmt = "{%s}: ";
+ *--argv = (char *)bb_msg_standard_input;
+ }
- count=0;
- do{
- c=fgetc(file);
- if(ISSTR(c))
- {
- if(i==0)
- t=count;
- if(i<=n)
- string[i]=c;
- if(i==n)
- {
- if(opt == 1 || opt == 3 )
- printf("%s: ", (!argv[a])? "{stdin}" : argv[a]);
- if(opt >= 2 )
- printf("%7lo ", t);
- printf("%s", string);
+ 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(string, stdout);
}
- if(i>n)
- putchar(c);
- i++;
+ count++;
}
- else
- {
- if(i>n)
- putchar('\n');
- i=0;
+ } else {
+ if (count > n) {
+ bb_putchar('\n');
}
- count++;
- }while(c!=EOF);
+ count = 0;
+ }
+ offset++;
+ } while (c != EOF);
+ fclose_if_not_stdin(file);
+ } while (*++argv);
- bb_fclose_nonstdin(file);
- }
- else
- {
- bb_perror_msg("%s",argv[a]);
- status=EXIT_FAILURE;
- }
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(string);
+ free(radix_fmt);
}
- free(string);
- exit(status);
-}
-/*
- * 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.
- */
+ fflush_stdout_and_exit(status);
+}
projects / oweals / busybox.git / blobdiff