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61796945e

Glenn L McGrath

2003-10-10

FAILED Duration: 87s

Subject

Vods versions of xargs

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No binary (build failed)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

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Commit Diff GitHub →

findutils/xargs.c +510 -191

findutils/xargs.c+510 -191

@@ -1,11 +1,13 @@
	/*
	* Mini xargs implementation for busybox
-	* Only "-prt" options are supported in this version of xargs.
+	* Options are supported: "-prtx -n max_arg -s max_chars -e[ouf_str]"
	*
-	* (C) 2002 by Vladimir Oleynik <[email protected]>
-	* (C) 2003 by Glenn McGrath <[email protected]>
+	* (C) 2002,2003 by Vladimir Oleynik <[email protected]>
	*
-	* Special thanks Mark Whitley for stimul to rewrote :)
+	* Special thanks
+	* - Mark Whitley and Glenn McGrath for stimul to rewrote :)
+	* - Mike Rendell <[email protected]>
+	* and David MacKenzie <[email protected]>.
	*
	* 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
@@ -21,15 +23,6 @@
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
-	*
-	* Reference:
-	* http://www.opengroup.org/onlinepubs/007904975/utilities/xargs.html
-	*
-	*
-	* BUGS:
-	* - E option doesnt allow spaces before argument
-	* - exit value of isnt correct
-	* - doesnt print quoted string properly
	*/

	#include <stdio.h>
@@ -38,224 +31,550 @@
	#include <unistd.h>
	#include <getopt.h>
	#include <errno.h>
+	#include <fcntl.h>
	#include <sys/types.h>
	#include <sys/wait.h>
-
	#include "busybox.h"

+	/* COMPAT: SYSV version defaults size (and has a max value of) to 470.
+	We try to make it as large as possible. */
+	#if !defined(ARG_MAX) && defined(_SC_ARG_MAX)
+	#define ARG_MAX sysconf (_SC_ARG_MAX)
+	#endif
+	#ifndef ARG_MAX
+	#define ARG_MAX 470
+	#endif
+
+
+	#ifdef TEST
+	# ifndef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
+	# define CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
+	# endif
+	# ifndef CONFIG_FEATURE_XARGS_SUPPORT_QUOTES
+	# define CONFIG_FEATURE_XARGS_SUPPORT_QUOTES
+	# endif
+	# ifndef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
+	# define CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
+	# endif
+	# ifndef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
+	# define CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
+	# endif
+	#endif
+
	/*
	This function have special algorithm.
	Don`t use fork and include to main!
	*/
-	static int xargs_exec(char **args)
+	static int
+	xargs_exec (char const args)
	{
-	pid_t p;
-	volatile int exec_errno; /* shared vfork stack */
-
-	exec_errno = 0;
-	p = vfork();
-	if (p < 0) {
-	bb_perror_msg_and_die("vfork");
-	} else if (p == 0) {
-	/* vfork -- child */
-	execvp(args[0], args);
-	exec_errno = errno; /* set error to shared stack */
-	_exit(1);
+	pid_t p;
+	volatile int exec_errno = 0; /* shared vfork stack */
+
+	if ((p = vfork ()) >= 0) {
+	if (p == 0) {
+	/* vfork -- child */
+	execvp (args[0], args);
+	exec_errno = errno; /* set error to shared stack */
+	_exit (1);
	} else {
-	/* vfork -- parent */
-	int status;
+	/* vfork -- parent */
+	int status;

-	while (wait(&status) == (pid_t) - 1) {
-	if (errno != EINTR) {
-	break;
-	}
+	while (wait (&status) == (pid_t) - 1)
+	if (errno != EINTR)
+	break;
+	if (exec_errno) {
+	errno = exec_errno;
+	bb_perror_msg ("%s", args[0]);
+	return exec_errno == ENOENT ? 127 : 126;
+	} else {
+	if (WEXITSTATUS (status) == 255) {
+	bb_error_msg ("%s: exited with status 255; aborting", args[0]);
+	return 124;
	}
-
-	if (exec_errno) {
-	errno = exec_errno;
-	bb_perror_msg("%s", args[0]);
-	return exec_errno == ENOENT ? 127 : 126;
-	} else if (WEXITSTATUS(status) == 255) {
-	bb_error_msg("%s: exited with status 255; aborting", args[0]);
-	return 124;
-	} else if (WIFSTOPPED(status)) {
-	bb_error_msg("%s: stopped by signal %d", args[0],
-	WSTOPSIG(status));
-	return 125;
-	} else if (WIFSIGNALED(status)) {
-	bb_error_msg("%s: terminated by signal %d", args[0],
-	WTERMSIG(status));
-	return 125;
-	} else if (WEXITSTATUS(status)) {
-	return 123;
-	} else {
-	return 0;
+	if (WIFSTOPPED (status)) {
+	bb_error_msg ("%s: stopped by signal %d", args[0],
+	WSTOPSIG (status));
+	return 125;
+	}
+	if (WIFSIGNALED (status)) {
+	bb_error_msg ("%s: terminated by signal %d", args[0],
+	WTERMSIG (status));
+	return 125;
	}
+	if (WEXITSTATUS (status) != 0)
+	return 123;
+	return 0;
+	}
	}
+	} else {
+	bb_perror_msg_and_die ("vfork");
+	}
	}

-	#define OPT_VERBOSE 0x1
-	#define OPT_TERMINATE 0x2
-	#define OPT_UPTO_NUMBER 0x4
-	#define OPT_UPTO_SIZE 0x8
-	#define OPT_EOF_STRING 0x10

-	int xargs_main(int argc, char **argv)
+	typedef struct xlist_s {
+	char *data;
+	size_t lenght;
+	struct xlist_s *link;
+	} xlist_t;
+
+	static int eof_stdin_detected;
+
+	#define ISBLANK(c) ((c) == ' ' \|\| (c) == '\t')
+	#define ISSPACE(c) (ISBLANK (c) \|\| (c) == '\n' \|\| (c) == '\r' \
+	\|\| (c) == '\f' \|\| (c) == '\v')
+
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_QUOTES
+	static xlist_t *
+	process_stdin (xlist_t list_arg, const char eof_str, size_t mc, char *buf)
	{
-	#ifdef CONFIG_FEATURE_XARGS_FANCY
-	char *s_max_args = NULL;
-	char *s_line_size = NULL;
-	#endif
-	char *eof_string = "_";
-	unsigned long flg;
+	#define NORM 0
+	#define QUOTE 1
+	#define BACKSLASH 2
+	#define SPACE 4
+
+	char s = NULL; / start word */
+	char p = NULL; / pointer to end word */
+	char q = 0; /* quote char */
+	char state = NORM;
+	char eof_str_detected = 0;
+	size_t line_l = 0; /* size loaded args line */
+	int c; /* current char */
+	xlist_t *cur;
+	xlist_t *prev;
+
+	for(prev = cur = list_arg; cur; cur = cur->link) {
+	line_l += cur->lenght; /* previous allocated */
+	if(prev != cur)
+	prev = prev->link;
+	}
+
+	while(!eof_stdin_detected) {
+	c = getchar();
+	if(c == EOF) {
+	eof_stdin_detected++;
+	if(s)
+	goto unexpected_eof;
+	break;
+	}
+	if(eof_str_detected)
+	continue;
+	if (state == BACKSLASH) {
+	state = NORM;
+	goto set;
+	} else if (state == QUOTE) {
+	if (c == q) {
+	q = 0;
+	state = NORM;
+	} else {
+	goto set;
+	}
+	} else /* if(state == NORM) */ {
+	if (ISSPACE (c)) {
+	if (s) {
+	unexpected_eof:
+	state = SPACE;
+	c = 0;
+	goto set;
+	}
+	} else {
+	if (s == NULL)
+	s = p = buf;
+	if (c == '\\') {
+	state = BACKSLASH;
+	} else if (c == '\'' \|\| c == '"') {
+	q = c;
+	state = QUOTE;
+	} else {
+	set:
+	if( (p-buf) >= mc)
+	bb_error_msg_and_die ("argument line too long");
+	*p++ = c;
+	}
+	}
+	}
+	if (state == SPACE) { /* word's delimiter or EOF detected */
+	if (q)
+	bb_error_msg_and_die ("unmatched %s quote",
+	q == '\'' ? "single" : "double");
+	/* word loaded */
+	if(eof_str) {
+	eof_str_detected = strcmp(s, eof_str) == 0;
+	}
+	if(!eof_str_detected) {
+	size_t lenght = (p-buf);

-	int line_size;
-	unsigned int max_args = LINE_MAX;
+	cur = xmalloc(sizeof(xlist_t) + lenght);
+	cur->data = memcpy(cur + 1, s, lenght);
+	cur->lenght = lenght;
+	cur->link = NULL;
+	if(prev == NULL) {
+	list_arg = cur;
+	} else {
+	prev->link = cur;
+	}
+	prev = cur;
+	line_l += lenght;
+	if(line_l > mc) {
+	/* stop memory usage :-) */
+	break;
+	}
+	}
+	s = NULL;
+	state = NORM;
+	}
+	}
+	return list_arg;
+	}
+	#else
+	/* The variant is unsupport single, double quotes and backslash */
+	static xlist_t *
+	process_stdin (xlist_t list_arg, const char eof_str, size_t mc, char *buf)
+	{

-	char *line_buffer = NULL;
-	char *line_buffer_ptr_ptr;
-	char *old_arg = NULL;
+	int c; /* current char */
+	int eof_str_detected = 0;
+	char s = NULL; / start word */
+	char p = NULL; / pointer to end word */
+	size_t line_l = 0; /* size loaded args line */
+	xlist_t *cur;
+	xlist_t *prev;

-	char **args;
-	char *args_entry_ptr;
+	for(prev = cur = list_arg; cur; cur = cur->link) {
+	line_l += cur->lenght; /* previous allocated */
+	if(prev != cur)
+	prev = prev->link;
+	}

-	int i;
-	int a;
+	while(!eof_stdin_detected) {
+	c = getchar();
+	if(c == EOF) {
+	eof_stdin_detected++;
+	}
+	if(eof_str_detected)
+	continue;
+	if (c == EOF \|\| ISSPACE (c)) {
+	if(s == NULL)
+	continue;
+	c = EOF;
+	}
+	if (s == NULL)
+	s = p = buf;
+	if( (p-buf) >= mc)
+	bb_error_msg_and_die ("argument line too long");
+	*p++ = c == EOF ? 0 : c;
+	if (c == EOF) { /* word's delimiter or EOF detected */
+	/* word loaded */
+	if(eof_str) {
+	eof_str_detected = strcmp(s, eof_str) == 0;
+	}
+	if(!eof_str_detected) {
+	size_t lenght = (p-buf);

-	#if 0
-	/* Default to maximum line length */
-	if (LINE_MAX > ARG_MAX - 2048) {
-	/* Minimum command line length */
-	line_size = LINE_MAX;
-	} else {
-	/* Maximum command line length */
-	line_size = ARG_MAX = 2048;
+	cur = xmalloc(sizeof(xlist_t) + lenght);
+	cur->data = memcpy(cur + 1, s, lenght);
+	cur->lenght = lenght;
+	cur->link = NULL;
+	if(prev == NULL) {
+	list_arg = cur;
+	} else {
+	prev->link = cur;
+	}
+	prev = cur;
+	line_l += lenght;
+	if(line_l > mc) {
+	/* stop memory usage :-) */
+	break;
+	}
+	s = NULL;
+	}
	}
+	}
+	return list_arg;
+	}
+	#endif /* CONFIG_FEATURE_XARGS_SUPPORT_QUOTES */
+
+
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
+	/* Prompt the user for a response, and
+	if the user responds affirmatively, return true;
+	otherwise, return false. Used "/dev/tty", not stdin. */
+	static int
+	xargs_ask_confirmation (void)
+	{
+	static FILE *tty_stream;
+	int c, savec;
+
+	if (!tty_stream) {
+	tty_stream = fopen ("/dev/tty", "r");
+	if (!tty_stream)
+	bb_perror_msg_and_die ("/dev/tty");
+	/* pranoidal security by vodz */
+	fcntl(fileno(tty_stream), F_SETFD, FD_CLOEXEC);
+	}
+	fputs (" ?...", stderr);
+	fflush (stderr);
+	c = savec = getc (tty_stream);
+	while (c != EOF && c != '\n')
+	c = getc (tty_stream);
+	if (savec == 'y' \|\| savec == 'Y')
+	return 1;
+	return 0;
+	}
+	# define OPT_INC_P 1
	#else
-	line_size = LINE_MAX;
-	#endif
-
-	#ifndef CONFIG_FEATURE_XARGS_FANCY
-	flg = bb_getopt_ulflags(argc, argv, "+t");
+	# define OPT_INC_P 0
+	# define xargs_ask_confirmation() 1
+	#endif /* CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION */
+
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
+	# define OPT_INC_X 1
	#else
-	flg = bb_getopt_ulflags(argc, argv, "+txn:s:E::", &s_max_args, &s_line_size, &eof_string);
+	# define OPT_INC_X 0
+	#endif

-	if (s_line_size) {
-	line_size = bb_xgetularg10_bnd(s_max_args, 1, line_size);
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
+	static xlist_t *
+	process0_stdin (xlist_t list_arg, const char eof_str, size_t mc, char *buf)
+	{
+	int c; /* current char */
+	char s = NULL; / start word */
+	char p = NULL; / pointer to end word */
+	size_t line_l = 0; /* size loaded args line */
+	xlist_t *cur;
+	xlist_t *prev;
+
+	for(prev = cur = list_arg; cur; cur = cur->link) {
+	line_l += cur->lenght; /* previous allocated */
+	if(prev != cur)
+	prev = prev->link;
+	}
+
+	while(!eof_stdin_detected) {
+	c = getchar();
+	if(c == EOF) {
+	eof_stdin_detected++;
+	if(s == NULL)
+	break;
+	c = 0;
	}
-	if (s_max_args) {
-	max_args = bb_xgetularg10(s_max_args);
+	if (s == NULL)
+	s = p = buf;
+	if( (p-buf) >= mc)
+	bb_error_msg_and_die ("argument line too long");
+	*p++ = c;
+	if (c == 0) { /* word's delimiter or EOF detected */
+	/* word loaded */
+	size_t lenght = (p-buf);
+
+	cur = xmalloc(sizeof(xlist_t) + lenght);
+	cur->data = memcpy(cur + 1, s, lenght);
+	cur->lenght = lenght;
+	cur->link = NULL;
+	if(prev == NULL) {
+	list_arg = cur;
+	} else {
+	prev->link = cur;
+	}
+	prev = cur;
+	line_l += lenght;
+	if(line_l > mc) {
+	/* stop memory usage :-) */
+	break;
+	}
+	s = NULL;
	}
+	}
+	return list_arg;
+	}
+	# define READ_ARGS(l, e, nmc, mc) (*read_args)(l, e, nmc, mc)
+	# define OPT_INC_0 1 /* future use */
+	#else
+	# define OPT_INC_0 0 /* future use */
+	# define READ_ARGS(l, e, nmc, mc) process_stdin(l, e, nmc, mc)
+	#endif /* CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM */
+
+
+	#define OPT_VERBOSE (1<<0)
+	#define OPT_NO_EMPTY (1<<1)
+	#define OPT_UPTO_NUMBER (1<<2)
+	#define OPT_UPTO_SIZE (1<<3)
+	#define OPT_EOF_STRING (1<<4)
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
+	#define OPT_INTERACTIVE (1<<5)
+	#else
+	#define OPT_INTERACTIVE (0) /* require for algorithm &\| */
	#endif
+	#define OPT_TERMINATE (1<<(5+OPT_INC_P))
+	#define OPT_ZEROTERM (1<<(5+OPT_INC_P+OPT_INC_X))
+	/* next future
+	#define OPT_NEXT_OTHER (1<<(5+OPT_INC_P+OPT_INC_X+OPT_INC_0))
+	*/

-	a = argc - optind;
-	argv += optind;
-	if (a == 0) {
-	/* default behavior is to echo all the filenames */
-	*argv = "echo";
-	a++;
-	}
-	/* allocating pointers for execvp: aarg, arg from stdin, NULL /
-	args = xcalloc(a + 2, sizeof(char *));
+	int
+	xargs_main (int argc, char **argv)
+	{
+	char **args;
+	int i, a, n;
+	xlist_t *list = NULL;
+	xlist_t *cur;
+	int child_error = 0;
+	char max_args, max_chars;
+	int n_max_arg;
+	size_t n_chars = 0;
+	long orig_arg_max;
+	const char *eof_str = "_";
+	unsigned long opt;
+	size_t n_max_chars;
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
+	xlist_t * (read_args) (xlist_t , const char , size_t, char ) = process_stdin;
+	#endif

-	/* Store the command to be executed (taken from the command line) */
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
+	bb_opt_complementaly = "pt";
+	#endif
+
+	opt = bb_getopt_ulflags (argc, argv, "+trn:s:e::"
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
+	"p"
+	#endif
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
+	"x"
+	#endif
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
+	"0"
+	#endif
+	, &max_args, &max_chars, &eof_str);
+
+	a = argc - optind;
+	argv += optind;
+	if (a == 0) {
+	/* default behavior is to echo all the filenames */
+	*argv = "echo";
+	a++;
+	}
+
+	orig_arg_max = ARG_MAX;
+	if (orig_arg_max == -1)
+	orig_arg_max = LONG_MAX;
+	orig_arg_max -= 2048; /* POSIX.2 requires subtracting 2048. */
+	if ((opt & OPT_UPTO_SIZE)) {
+	n_max_chars = bb_xgetularg10_bnd (max_chars, 1, orig_arg_max);
	for (i = 0; i < a; i++) {
-	line_size -= strlen(*argv) + 1;
-	args[i] = *argv++;
+	n_chars += strlen (*argv) + 1;
	}
-	if (line_size < 1) {
-	bb_error_msg_and_die("can not fit single argument within argument list size limit");
+	if (n_max_chars < n_chars) {
+	bb_error_msg_and_die
+	("can not fit single argument within argument list size limit");
	}
+	n_max_chars -= n_chars;
+	} else {
+	/* Sanity check for systems with huge ARG_MAX defines (e.g., Suns which
+	have it at 1 meg). Things will work fine with a large ARG_MAX but it
+	will probably hurt the system more than it needs to; an array of this
+	size is allocated. */
+	if (orig_arg_max > 20 * 1024)
+	orig_arg_max = 20 * 1024;
+	n_max_chars = orig_arg_max;
+	}
+	max_chars = xmalloc(n_max_chars);

-	args[i] = xmalloc(line_size);
-	args_entry_ptr = args[i];
-
-	/* Now, read in one line at a time from stdin, and store this
-	* line to be used later as an argument to the command */
-	do {
-	char *line_buffer_ptr = NULL;
-	unsigned int arg_count = 0;
-	unsigned int arg_size = 0;
-
-	*args_entry_ptr = '\0';
-
-	/* Get the required number of entries from stdin */
-	do {
-	/* (Re)fill the line buffer */
-	if (line_buffer == NULL) {
-	line_buffer = bb_get_chomped_line_from_file(stdin);
-	if (line_buffer == NULL) {
-	/* EOF, exit outer loop */
-	break;
-	}
-	line_buffer_ptr =
-	strtok_r(line_buffer, " \t", &line_buffer_ptr_ptr);
-	} else {
-	if (old_arg) {
-	line_buffer_ptr = old_arg;
-	old_arg = NULL;
-	} else {
-	line_buffer_ptr =
-	strtok_r(NULL, " \t", &line_buffer_ptr_ptr);
-	}
-	}
-	/* If no arguments left go back and get another line */
-	if (line_buffer_ptr == NULL) {
-	free(line_buffer);
-	line_buffer = NULL;
-	continue;
-	}
-
-	#ifdef CONFIG_FEATURE_XARGS_FANCY
-	if (eof_string && (strcmp(line_buffer_ptr, eof_string) == 0)) {
-	#else
-	if (strcmp(line_buffer_ptr, eof_string) == 0) {
+	if ((opt & OPT_UPTO_NUMBER)) {
+	n_max_arg = bb_xgetularg10_bnd (max_args, 1, INT_MAX);
+	} else {
+	n_max_arg = n_max_chars;
+	}
+
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
+	if(opt & OPT_ZEROTERM)
+	read_args = process0_stdin;
	#endif
-	/* logical EOF, exit outer loop */
-	line_buffer = NULL;
-	break;
-	}
-
-	/* Check the next argument will fit */
-	arg_size += 1 + strlen(line_buffer_ptr);
-	if (arg_size > line_size) {
-	if ((arg_count == 0)
-	#ifdef CONFIG_FEATURE_XARGS_FANCY
-	\|\| ((flg & OPT_TERMINATE) && (arg_count != max_args))) {
+
+	while ((list = READ_ARGS(list, eof_str, n_max_chars, max_chars)) != NULL
+	\|\| (opt & OPT_NO_EMPTY) == 0) {
+	opt \|= OPT_NO_EMPTY;
+	n = 0;
+	n_chars = 0;
+	#ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
+	for (cur = list; cur; ) {
+	n_chars += cur->lenght;
+	n++;
+	cur = cur->link;
+	if (n_chars > n_max_chars \|\| (n == n_max_arg && cur)) {
+	if (opt & OPT_TERMINATE)
+	bb_error_msg_and_die ("argument list too long");
+	break;
+	}
+	}
	#else
-	) {
-	#endif
-	bb_error_msg_and_die("argument line too long");
-	}
-	old_arg = line_buffer_ptr;
-	break;
-	}
-
-	/* Add the entry to our pre-allocated space */
-	strcat(args_entry_ptr, line_buffer_ptr);
-	strcat(args_entry_ptr, " ");
-	arg_count++;
-	} while (arg_count < max_args);
-
-	/* Remove the last space */
-	args_entry_ptr[arg_size - 1] = '\0';
-
-	if (*args_entry_ptr != '\0') {
-	if (flg & OPT_VERBOSE) {
-	for (i = 0; args[i]; i++) {
-	if (i) {
-	fputc(' ', stderr);
-	}
-	fputs(args[i], stderr);
-	}
-	fputc('\n', stderr);
-	}
-	xargs_exec(args);
+	for (cur = list; cur; cur = cur->link) {
+	n_chars += cur->lenght;
+	n++;
+	if (n_chars > n_max_chars \|\| n == n_max_arg) {
+	break;
+	}
+	}
+	#endif /* CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT */
+
+	/* allocating pointers for execvp:
+	aarg, narg from stdin, NULL */
+	args = xcalloc (n + a + 1, sizeof (char *));
+
+	/* Store the command to be executed
+	(taken from the command line) */
+	for (i = 0; i < a; i++)
+	args[i] = argv[i];
+	/* (taken from stdin) */
+	for (cur = list; n; cur = cur->link) {
+	args[i++] = cur->data;
+	n--;
+	}
+
+	if ((opt & (OPT_INTERACTIVE\|OPT_VERBOSE))) {
+	for (i = 0; args[i]; i++) {
+	if (i)
+	fputc (' ', stderr);
+	fputs (args[i], stderr);
	}
-	} while (line_buffer);
+	if((opt & OPT_INTERACTIVE) == 0)
+	fputc ('\n', stderr);
+	}
+	if ((opt & OPT_INTERACTIVE) == 0 \|\| xargs_ask_confirmation () != 0) {
+	child_error = xargs_exec (args);
+	}

+	/* clean up */
+	for (i = a; args[i]; i++) {
+	cur = list;
+	list = list->link;
+	free (cur);
+	}
+	free (args);
+	if (child_error > 0 && child_error != 123) {
+	break;
+	}
+	}
	#ifdef CONFIG_FEATURE_CLEAN_UP
-	free(args);
+	free(max_chars);
	#endif
-	return 0;
+	return child_error;
+	}
+
+
+	#ifdef TEST
+
+	const char *bb_applet_name = "debug stuff usage";
+
+	void bb_show_usage(void)
+	{
+	fprintf(stderr, "Usage: %s [-p] [-r] [-t] -[x] [-n max_arg] [-s max_chars]\n", bb_applet_name);
+	exit(1);
+	}
+
+	int main(int argc, char **argv)
+	{
+	return xargs_main(argc, argv);
	}
+	#endif /* TEST */