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Diffstat (limited to 'miscutils/strings.c')
| -rw-r--r-- | miscutils/strings.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/miscutils/strings.c b/miscutils/strings.c new file mode 100644 index 0000000..043d6b8 --- /dev/null +++ b/miscutils/strings.c @@ -0,0 +1,142 @@ +/* vi: set sw=4 ts=4: */ +/* + * strings implementation for busybox + * + * Copyright (c) 1980, 1987 + * The Regents of the University of California. All rights reserved. + * + * 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> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <unistd.h> +#include <ctype.h> +#include "busybox.h" + +#define ISSTR(ch) (isprint(ch) || ch == '\t') + +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; + + + exitcode = fflg = oflg = 0; + minlen = -1; + while ((ch = getopt(argc, argv, "an:of")) > 0) + switch(ch) { + case '-': + break; + case 'f': + fflg = 1; + break; + case 'n': + minlen = atoi(optarg); + break; + case 'o': + oflg = 1; + break; + default: + show_usage(); + } + argc -= optind; + argv += optind; + + if (minlen == -1) + minlen = 4; + + 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; + } + } + foff = 0; + + for (cnt = 0; (ch = getchar()) != EOF;) { + if (ISSTR(ch)) { + if (!cnt) + C = bfr; + *C++ = ch; + if (++cnt < minlen) + continue; + if (fflg) + printf("%s:", file); + if (oflg) + printf("%07ld %s", (long)(foff - minlen), (char *)bfr); + else + printf("%s", bfr); + while ((ch = getchar()) != EOF && ISSTR(ch)) + putchar((char)ch); + putchar('\n'); + } + cnt = 0; + } + } while (*argv); + exit(exitcode); +} + +/* + * 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. + */ |