+/* vi: set sw=4 ts=4: */
/*
* hexdump implementation for busybox
* Based on code from util-linux v 2.11l
* Copyright (c) 1989
* 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.
+ * Licensed under GPLv2 or later, see file License in this tarball for details.
*/
-#include <getopt.h>
-#include <stdlib.h>
-#include <string.h>
+#include "libbb.h"
#include "dump.h"
-#include "busybox.h"
-extern off_t skip; /* bytes to skip */
+/* This is a NOEXEC applet. Be very careful! */
-extern FS *fshead; /* head of format strings */
-extern int blocksize; /* data block size */
-extern int length; /* max bytes to read */
-
-void addfile(char *name)
+static void bb_dump_addfile(dumper_t *dumper, char *name)
{
- register char *p;
+ char *p;
FILE *fp;
- int ch;
- char buf[2048 + 1];
+ char *buf;
- if (!(fp = fopen(name, "r"))) {
- error_msg_and_die("hexdump: can't read %s.\n", name);
- }
- while (fgets(buf, sizeof(buf), fp)) {
- if (!(p = index(buf, '\n'))) {
- error_msg("hexdump: line too long.\n");
- while ((ch = getchar()) != '\n' && ch != EOF);
- continue;
- }
- *p = '\0';
- for (p = buf; *p && isspace(*p); ++p);
- if (!*p || *p == '#') {
- continue;
+ fp = xfopen_for_read(name);
+ while ((buf = xmalloc_fgetline(fp)) != NULL) {
+ p = skip_whitespace(buf);
+ if (*p && (*p != '#')) {
+ bb_dump_add(dumper, p);
}
- add(p);
+ free(buf);
}
- (void)fclose(fp);
+ fclose(fp);
}
+static const char *const add_strings[] = {
+ "\"%07.7_ax \" 16/1 \"%03o \" \"\\n\"", /* b */
+ "\"%07.7_ax \" 16/1 \"%3_c \" \"\\n\"", /* c */
+ "\"%07.7_ax \" 8/2 \" %05u \" \"\\n\"", /* d */
+ "\"%07.7_ax \" 8/2 \" %06o \" \"\\n\"", /* o */
+ "\"%07.7_ax \" 8/2 \" %04x \" \"\\n\"", /* x */
+};
+
+static const char add_first[] ALIGN1 = "\"%07.7_Ax\n\"";
+
+static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v" USE_FEATURE_HEXDUMP_REVERSE("R");
+
+static const struct suffix_mult suffixes[] = {
+ { "b", 512 },
+ { "k", 1024 },
+ { "m", 1024*1024 },
+ { }
+};
+
+int hexdump_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int hexdump_main(int argc, char **argv)
{
-// register FS *tfs;
- char *p;
+ dumper_t *dumper = alloc_dumper();
+ const char *p;
int ch;
- extern enum _vflag vflag;
- vflag = FIRST;
- length = -1;
-
- while ((ch = getopt(argc, argv, "bcde:f:n:os:vx")) != EOF) {
- switch (ch) {
- case 'b':
- add("\"%07.7_Ax\n\"");
- add("\"%07.7_ax \" 16/1 \"%03o \" \"\\n\"");
- break;
- case 'c':
- add("\"%07.7_Ax\n\"");
- add("\"%07.7_ax \" 16/1 \"%3_c \" \"\\n\"");
- break;
- case 'd':
- add("\"%07.7_Ax\n\"");
- add("\"%07.7_ax \" 8/2 \" %05u \" \"\\n\"");
- break;
- case 'e':
- add(optarg);
- break;
- case 'f':
- addfile(optarg);
- break;
- case 'n':
- if ((length = atoi(optarg)) < 0) {
- error_msg_and_die("hexdump: bad length value.\n");
- }
- break;
- case 'o':
- add("\"%07.7_Ax\n\"");
- add("\"%07.7_ax \" 8/2 \" %06o \" \"\\n\"");
- break;
- case 's':
- if ((skip = strtol(optarg, &p, 0)) < 0) {
- error_msg_and_die("hexdump: bad skip value.\n");
- }
- switch(*p) {
- case 'b':
- skip *= 512;
- break;
- case 'k':
- skip *= 1024;
- break;
- case 'm':
- skip *= 1048576;
- break;
- }
- break;
- case 'v':
- vflag = ALL;
- break;
- case 'x':
- add("\"%07.7_Ax\n\"");
- add("\"%07.7_ax \" 8/2 \" %04x \" \"\\n\"");
- break;
- case '?':
- show_usage();
+#if ENABLE_FEATURE_HEXDUMP_REVERSE
+ FILE *fp;
+ smallint rdump = 0;
+#endif
+
+ if (ENABLE_HD && !applet_name[2]) { /* we are "hd" */
+ ch = 'C';
+ goto hd_applet;
+ }
+
+ /* We cannot use getopt32: in hexdump options are cumulative.
+ * E.g. "hexdump -C -C file" should dump each line twice */
+ while ((ch = getopt(argc, argv, hexdump_opts)) > 0) {
+ p = strchr(hexdump_opts, ch);
+ if (!p)
+ bb_show_usage();
+ if ((p - hexdump_opts) < 5) {
+ bb_dump_add(dumper, add_first);
+ bb_dump_add(dumper, add_strings[(int)(p - hexdump_opts)]);
+ }
+ /* Save a little bit of space below by omitting the 'else's. */
+ if (ch == 'C') {
+ hd_applet:
+ bb_dump_add(dumper, "\"%08.8_Ax\n\"");
+ bb_dump_add(dumper, "\"%08.8_ax \" 8/1 \"%02x \" \" \" 8/1 \"%02x \" ");
+ bb_dump_add(dumper, "\" |\" 16/1 \"%_p\" \"|\\n\"");
}
+ if (ch == 'e') {
+ bb_dump_add(dumper, optarg);
+ } /* else */
+ if (ch == 'f') {
+ bb_dump_addfile(dumper, optarg);
+ } /* else */
+ if (ch == 'n') {
+ dumper->dump_length = xatoi_u(optarg);
+ } /* else */
+ if (ch == 's') {
+ dumper->dump_skip = xatoul_range_sfx(optarg, 0, LONG_MAX, suffixes);
+ } /* else */
+ if (ch == 'v') {
+ dumper->dump_vflag = ALL;
+ }
+#if ENABLE_FEATURE_HEXDUMP_REVERSE
+ if (ch == 'R') {
+ rdump = 1;
+ }
+#endif
}
- if (!fshead) {
- add("\"%07.7_Ax\n\"");
- add("\"%07.7_ax \" 8/2 \"%04x \" \"\\n\"");
+ if (!dumper->fshead) {
+ bb_dump_add(dumper, add_first);
+ bb_dump_add(dumper, "\"%07.7_ax \" 8/2 \"%04x \" \"\\n\"");
}
argv += optind;
- return(dump(argv));
+#if !ENABLE_FEATURE_HEXDUMP_REVERSE
+ return bb_dump_dump(dumper, argv);
+#else
+ if (!rdump) {
+ return bb_dump_dump(dumper, argv);
+ }
+
+ /* -R: reverse of 'hexdump -Cv' */
+ fp = stdin;
+ if (!*argv) {
+ argv--;
+ goto jump_in;
+ }
+
+ do {
+ char *buf;
+ fp = xfopen_for_read(*argv);
+ jump_in:
+ while ((buf = xmalloc_fgetline(fp)) != NULL) {
+ p = buf;
+ while (1) {
+ /* skip address or previous byte */
+ while (isxdigit(*p)) p++;
+ while (*p == ' ') p++;
+ /* '|' char will break the line */
+ if (!isxdigit(*p) || sscanf(p, "%x ", &ch) != 1)
+ break;
+ putchar(ch);
+ }
+ free(buf);
+ }
+ fclose(fp);
+ } while (*++argv);
+
+ fflush_stdout_and_exit(EXIT_SUCCESS);
+#endif
}
-/*
- * Copyright (c) 1989 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. 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.
- */
projects / oweals / busybox.git / blobdiff