/*
- * od implementation for busybox
- * Based on code from util-linux v 2.11l
+ * Mini xargs implementation for busybox
*
- * Copyright (c) 1990
- * The Regents of the University of California. All rights reserved.
+ * 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>
*
* 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
* 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 <ctype.h>
-#include <getopt.h>
+#include <stdio.h>
#include <stdlib.h>
-#include "dump.h"
+#include <string.h>
#include "busybox.h"
-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)
+int xargs_main(int argc, char **argv)
{
- extern off_t skip;
- register char *num, *p;
- int base;
- char *end;
+ char *cmd_to_be_executed;
+ char *file_to_act_on;
+ int i;
+ int len;
/*
- * 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.
+ * No options are supported in this version of xargs; no getopt.
*
- * We assumes it's a file if the offset is bad.
- */
- p = **argvp;
- 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.
+ * 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.
*/
- 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;
- }
-
- /* skip over the number */
- if (base == 16)
- for (num = p; ishexdigit(*p); ++p);
- else
- for (num = p; isdigit(*p); ++p);
-
- /* check for no number */
- if (num == p)
- return;
- /* if terminates with a '.', base is decimal */
- if (*p == '.') {
- if (base)
- return;
- base = 10;
+ 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]);
}
- skip = strtol(num, &end, base ? base : 8);
+ /* 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 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';
- }
- }
- }
-}
+ FILE *cmd_output;
+ char *output_line;
+ char *execstr;
-static void odprecede(void)
-{
- static int first = 1;
+ /* eat the newline off the filename. */
+ chomp(file_to_act_on);
- if (first) {
- first = 0;
- add("\"%07.7_Ao\n\"");
- add("\"%07.7_ao \"");
- } else
- add("\" \"");
-}
+ /* eat blank lines */
+ if (file_to_act_on[0] == 0)
+ continue;
-int od_main(int argc, char **argv)
-{
- int ch;
- extern enum _vflag vflag;
- vflag = FIRST;
- length = -1;
+ /* 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");
- 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();
+ /* harvest the output */
+ while ((output_line = get_line_from_file(cmd_output)) != NULL) {
+ fputs(output_line, stdout);
+ free(output_line);
}
- if (!fshead) {
- add("\"%07.7_Ao\n\"");
- add("\"%07.7_ao \" 8/2 \"%06o \" \"\\n\"");
+ /* clean up */
+ pclose(cmd_output);
+ free(execstr);
+ free(file_to_act_on);
}
- argc -= optind;
- argv += optind;
-
- odoffset(argc, &argv);
+#ifdef CONFIG_FEATURE_CLEAN_UP
+ free(cmd_to_be_executed);
+#endif
- return(dump(argv));
+ return 0;
}
-/*-
- * 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.
- */
+/* vi: set sw=4 ts=4: */
projects / oweals / busybox.git / commitdiff