Implement a small strings applet
This commit is contained in:
Eric Andersen
parent
f9496d4e44
commit
ef5e8f8de0
@ -440,6 +440,9 @@
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#ifdef CONFIG_START_STOP_DAEMON
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APPLET_ODDNAME("start-stop-daemon", start_stop_daemon_main, _BB_DIR_SBIN, _BB_SUID_NEVER, start_stop_daemon)
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#endif
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#ifdef CONFIG_STRINGS
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APPLET(strings, strings_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
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#endif
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#ifdef CONFIG_STTY
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APPLET(stty, stty_main, _BB_DIR_BIN, _BB_SUID_NEVER)
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#endif
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@ -1681,6 +1681,15 @@
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"-s <signal>\t\tsignal to send (default 15)\n"\
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"-a <pathname>\t\tprogram to start (default <executable>)\n"
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#define strings_trivial_usage \
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"[-afo] [-n length] [file ... ]"
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#define strings_full_usage \
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"Display printable strings in a binary file." \
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"\n\nOptions:" \
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"\n\t-f\tPrecede each string with the name of the file where it was found." \
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"\n\t-n N\tSpecifies that at least N characters forms a sequence (default 4)" \
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"\n\t-o\tEach string is preceded by its decimal offset in the file."
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#define stty_trivial_usage \
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"[-a|g] [-F DEVICE] [SETTING]..."
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#define stty_full_usage \
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@ -33,6 +33,7 @@ MISCUTILS-$(CONFIG_MAKEDEVS) += makedevs.o
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MISCUTILS-$(CONFIG_MKTEMP) += mktemp.o
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MISCUTILS-$(CONFIG_MT) += mt.o
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MISCUTILS-$(CONFIG_READLINK) += readlink.o
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MISCUTILS-$(CONFIG_STRINGS) += strings.o
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MISCUTILS-$(CONFIG_TIME) += time.o
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MISCUTILS-$(CONFIG_UPDATE) += update.o
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MISCUTILS-$(CONFIG_WATCHDOG) += watchdog.o
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@ -15,6 +15,7 @@ bool 'makedevs' CONFIG_MAKEDEVS
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bool 'mktemp' CONFIG_MKTEMP
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bool 'mt' CONFIG_MT
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bool 'readlink' CONFIG_READLINK
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bool 'strings' CONFIG_STRINGS
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bool 'time' CONFIG_TIME
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bool 'update' CONFIG_UPDATE
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bool 'watchdog' CONFIG_WATCHDOG
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142
miscutils/strings.c
Normal file
142
miscutils/strings.c
Normal file
@ -0,0 +1,142 @@
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/* 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 (c) 1980, 1987
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* The Regents of the University of California. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Original copyright notice is retained at the end of this file.
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*
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* Modified for BusyBox by Erik Andersen <andersee@debian.org>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <unistd.h>
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#include <ctype.h>
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#include "busybox.h"
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#define ISSTR(ch) (isprint(ch) || ch == '\t')
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int strings_main(int argc, char **argv)
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{
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extern char *optarg;
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extern int optind;
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int ch, cnt;
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int exitcode;
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int oflg, fflg;
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char *file;
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size_t foff, minlen;
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unsigned char *bfr, *C;
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exitcode = fflg = oflg = 0;
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minlen = -1;
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while ((ch = getopt(argc, argv, "an:of")) > 0)
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switch(ch) {
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case '-':
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break;
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case 'f':
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fflg = 1;
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break;
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case 'n':
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minlen = atoi(optarg);
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break;
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case 'o':
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oflg = 1;
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break;
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default:
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show_usage();
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}
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argc -= optind;
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argv += optind;
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if (minlen == -1)
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minlen = 4;
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bfr = xmalloc(minlen);
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bfr[minlen] = '\0';
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file = "stdin";
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do {
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if (*argv) {
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fprintf(stderr, "opening '%s'\n", *argv);
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file = *argv++;
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if (!freopen(file, "r", stdin)) {
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perror_msg("%s", file);
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exitcode = EXIT_FAILURE;
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continue;
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}
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}
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foff = 0;
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for (cnt = 0; (ch = getchar()) != EOF;) {
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if (ISSTR(ch)) {
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if (!cnt)
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C = bfr;
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*C++ = ch;
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if (++cnt < minlen)
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continue;
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if (fflg)
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printf("%s:", file);
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if (oflg)
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printf("%07ld %s", (long)(foff - minlen), (char *)bfr);
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else
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printf("%s", bfr);
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while ((ch = getchar()) != EOF && ISSTR(ch))
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putchar((char)ch);
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putchar('\n');
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}
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cnt = 0;
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}
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} while (*argv);
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exit(exitcode);
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}
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/*
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* Copyright (c) 1980, 1987
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
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* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
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*
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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