diff options
Diffstat (limited to 'coreutils/od.c')
| -rw-r--r-- | coreutils/od.c | 294 |
1 files changed, 230 insertions, 64 deletions
diff --git a/coreutils/od.c b/coreutils/od.c index 471bae4..6187cad 100644 --- a/coreutils/od.c +++ b/coreutils/od.c @@ -1,9 +1,9 @@ /* - * Mini xargs implementation for busybox + * od implementation for busybox + * Based on code from util-linux v 2.11l * - * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen - * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org> - * Remixed by Mark Whitley <markw@codepoet.org> + * Copyright (c) 1990 + * 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 @@ -19,88 +19,254 @@ * 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. */ -#include <stdio.h> +#include <ctype.h> +#include <getopt.h> #include <stdlib.h> -#include <string.h> +#include "dump.h" #include "busybox.h" -int xargs_main(int argc, char **argv) +extern FS *fshead; /* head of format strings */ +extern int blocksize; /* data block size */ +extern int length; /* max bytes to read */ + +#define ishexdigit(c) \ + ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')) + +static void +odoffset(int argc, char ***argvp) { - char *cmd_to_be_executed; - char *file_to_act_on; - int i; - int len; + extern off_t skip; + register char *num, *p; + int base; + char *end; /* - * No options are supported in this version of xargs; no getopt. + * The offset syntax of od(1) was genuinely bizarre. First, if + * it started with a plus it had to be an offset. Otherwise, if + * there were at least two arguments, a number or lower-case 'x' + * followed by a number makes it an offset. By default it was + * octal; if it started with 'x' or '0x' it was hex. If it ended + * in a '.', it was decimal. If a 'b' or 'B' was appended, it + * multiplied the number by 512 or 1024 byte units. There was + * no way to assign a block count to a hex offset. * - * Re: The missing -t flag: Most programs that produce output also print - * the filename, so xargs doesn't really need to do it again. Supporting - * the -t flag =greatly= bloats up the size of this app and the memory it - * uses because you have to buffer all the input file strings in memory. If - * you really want to see the filenames that xargs will act on, just run it - * once with no args and xargs will echo the filename. Simple. + * We assumes it's a file if the offset is bad. */ + p = **argvp; - argv++; - len = argc; /* arg = count for ' ' + trailing '\0' */ - /* Store the command to be executed (taken from the command line) */ - if (argc == 1) { - /* default behavior is to echo all the filenames */ - argv[0] = "/bin/echo"; - len++; /* space for trailing '\0' */ - } else { - argc--; - } - /* concatenate all the arguments passed to xargs together */ - for (i = 0; i < argc; i++) - len += strlen(argv[i]); - cmd_to_be_executed = xmalloc (len); - for (i = len = 0; i < argc; i++) { - len = sprintf(cmd_to_be_executed + len, "%s ", argv[i]); + if (!p) { + /* hey someone is probably piping to us ... */ + return; } - /* Now, read in one line at a time from stdin, and store this - * line to be used later as an argument to the command */ - while ((file_to_act_on = get_line_from_file(stdin)) !=NULL) { + if (*p != '+' && (argc < 2 || + (!isdigit(p[0]) && (p[0] != 'x' || !ishexdigit(p[1]))))) + return; + + base = 0; + /* + * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and + * set base. + */ + if (p[0] == '+') + ++p; + if (p[0] == 'x' && ishexdigit(p[1])) { + ++p; + base = 16; + } else if (p[0] == '0' && p[1] == 'x') { + p += 2; + base = 16; + } - FILE *cmd_output; - char *output_line; - char *execstr; + /* skip over the number */ + if (base == 16) + for (num = p; ishexdigit(*p); ++p); + else + for (num = p; isdigit(*p); ++p); - /* eat the newline off the filename. */ - chomp(file_to_act_on); + /* check for no number */ + if (num == p) + return; - /* eat blank lines */ - if (file_to_act_on[0] == 0) - continue; + /* if terminates with a '.', base is decimal */ + if (*p == '.') { + if (base) + return; + base = 10; + } - /* assemble the command and execute it */ - bb_asprintf(&execstr, "%s%s", cmd_to_be_executed, file_to_act_on); - - cmd_output = popen(execstr, "r"); - if (cmd_output == NULL) - perror_msg_and_die("popen"); + skip = strtol(num, &end, base ? base : 8); - /* harvest the output */ - while ((output_line = get_line_from_file(cmd_output)) != NULL) { - fputs(output_line, stdout); - free(output_line); + /* if end isn't the same as p, we got a non-octal digit */ + if (end != p) + skip = 0; + else { + if (*p) { + if (*p == 'b') + skip *= 512; + else if (*p == 'B') + skip *= 1024; + ++p; + } + if (*p) + skip = 0; + else { + ++*argvp; + /* + * If the offset uses a non-octal base, the base of + * the offset is changed as well. This isn't pretty, + * but it's easy. + */ +#define TYPE_OFFSET 7 + if (base == 16) { + fshead->nextfu->fmt[TYPE_OFFSET] = 'x'; + fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x'; + } else if (base == 10) { + fshead->nextfu->fmt[TYPE_OFFSET] = 'd'; + fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd'; + } } + } +} - /* clean up */ - pclose(cmd_output); - free(execstr); - free(file_to_act_on); +static void odprecede(void) +{ + static int first = 1; + + if (first) { + first = 0; + add("\"%07.7_Ao\n\""); + add("\"%07.7_ao \""); + } else + add("\" \""); +} + +int od_main(int argc, char **argv) +{ + int ch; + extern enum _vflag vflag; + vflag = FIRST; + length = -1; + + while ((ch = getopt(argc, argv, "aBbcDdeFfHhIiLlOoPpswvXx")) != EOF) + switch (ch) { + case 'a': + odprecede(); + add("16/1 \"%3_u \" \"\\n\""); + break; + case 'B': + case 'o': + odprecede(); + add("8/2 \" %06o \" \"\\n\""); + break; + case 'b': + odprecede(); + add("16/1 \"%03o \" \"\\n\""); + break; + case 'c': + odprecede(); + add("16/1 \"%3_c \" \"\\n\""); + break; + case 'd': + odprecede(); + add("8/2 \" %05u \" \"\\n\""); + break; + case 'D': + odprecede(); + add("4/4 \" %010u \" \"\\n\""); + break; + case 'e': /* undocumented in od */ + case 'F': + odprecede(); + add("2/8 \" %21.14e \" \"\\n\""); + break; + + case 'f': + odprecede(); + add("4/4 \" %14.7e \" \"\\n\""); + break; + case 'H': + case 'X': + odprecede(); + add("4/4 \" %08x \" \"\\n\""); + break; + case 'h': + case 'x': + odprecede(); + add("8/2 \" %04x \" \"\\n\""); + break; + case 'I': + case 'L': + case 'l': + odprecede(); + add("4/4 \" %11d \" \"\\n\""); + break; + case 'i': + odprecede(); + add("8/2 \" %6d \" \"\\n\""); + break; + case 'O': + odprecede(); + add("4/4 \" %011o \" \"\\n\""); + break; + case 'v': + vflag = ALL; + break; + case 'P': + case 'p': + case 's': + case 'w': + case '?': + default: + error_msg("od: od(1) has been deprecated for hexdump(1).\n"); + if (ch != '?') { + error_msg("od: hexdump(1) compatibility doesn't support the -%c option%s\n", + ch, ch == 's' ? "; see strings(1)." : "."); + } + show_usage(); + } + + if (!fshead) { + add("\"%07.7_Ao\n\""); + add("\"%07.7_ao \" 8/2 \"%06o \" \"\\n\""); } -#ifdef CONFIG_FEATURE_CLEAN_UP - free(cmd_to_be_executed); -#endif + argc -= optind; + argv += optind; + + odoffset(argc, &argv); - return 0; + return(dump(argv)); } -/* vi: set sw=4 ts=4: */ +/*- + * Copyright (c) 1990 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. + */ |