2006-06-02 20:56:16 +00:00
|
|
|
/* vi: set sw=4 ts=4: */
|
2000-09-22 20:22:28 +00:00
|
|
|
/*
|
2000-09-23 06:10:14 +00:00
|
|
|
* Mini xargs implementation for busybox
|
2003-10-10 12:10:18 +00:00
|
|
|
* Options are supported: "-prtx -n max_arg -s max_chars -e[ouf_str]"
|
2000-09-23 06:10:14 +00:00
|
|
|
*
|
2003-10-10 12:10:18 +00:00
|
|
|
* (C) 2002,2003 by Vladimir Oleynik <dzo@simtreas.ru>
|
2002-11-10 21:47:17 +00:00
|
|
|
*
|
2003-10-10 12:10:18 +00:00
|
|
|
* Special thanks
|
2004-04-14 17:51:38 +00:00
|
|
|
* - Mark Whitley and Glenn McGrath for stimulus to rewrite :)
|
2003-10-10 12:10:18 +00:00
|
|
|
* - Mike Rendell <michael@cs.mun.ca>
|
|
|
|
* and David MacKenzie <djm@gnu.ai.mit.edu>.
|
2000-09-22 20:22:28 +00:00
|
|
|
*
|
2006-06-02 20:56:16 +00:00
|
|
|
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
2000-09-22 20:22:28 +00:00
|
|
|
*
|
2003-10-30 22:51:33 +00:00
|
|
|
* xargs is described in the Single Unix Specification v3 at
|
|
|
|
* http://www.opengroup.org/onlinepubs/007904975/utilities/xargs.html
|
|
|
|
*
|
2000-09-22 20:22:28 +00:00
|
|
|
*/
|
2000-09-22 20:01:23 +00:00
|
|
|
|
2010-05-09 02:22:48 +00:00
|
|
|
//kbuild:lib-$(CONFIG_XARGS) += xargs.o
|
|
|
|
//config:
|
|
|
|
//config:config XARGS
|
|
|
|
//config: bool "xargs"
|
2010-06-06 02:14:28 +00:00
|
|
|
//config: default y
|
2010-05-09 02:22:48 +00:00
|
|
|
//config: help
|
|
|
|
//config: xargs is used to execute a specified command for
|
|
|
|
//config: every item from standard input.
|
|
|
|
//config:
|
|
|
|
//config:config FEATURE_XARGS_SUPPORT_CONFIRMATION
|
|
|
|
//config: bool "Enable -p: prompt and confirmation"
|
2010-06-06 02:14:28 +00:00
|
|
|
//config: default y
|
2010-05-09 02:22:48 +00:00
|
|
|
//config: depends on XARGS
|
|
|
|
//config: help
|
|
|
|
//config: Support -p: prompt the user whether to run each command
|
|
|
|
//config: line and read a line from the terminal.
|
|
|
|
//config:
|
|
|
|
//config:config FEATURE_XARGS_SUPPORT_QUOTES
|
|
|
|
//config: bool "Enable single and double quotes and backslash"
|
2010-06-06 02:14:28 +00:00
|
|
|
//config: default y
|
2010-05-09 02:22:48 +00:00
|
|
|
//config: depends on XARGS
|
|
|
|
//config: help
|
|
|
|
//config: Support quoting in the input.
|
|
|
|
//config:
|
|
|
|
//config:config FEATURE_XARGS_SUPPORT_TERMOPT
|
|
|
|
//config: bool "Enable -x: exit if -s or -n is exceeded"
|
2010-06-06 02:14:28 +00:00
|
|
|
//config: default y
|
2010-05-09 02:22:48 +00:00
|
|
|
//config: depends on XARGS
|
|
|
|
//config: help
|
|
|
|
//config: Support -x: exit if the command size (see the -s or -n option)
|
|
|
|
//config: is exceeded.
|
|
|
|
//config:
|
|
|
|
//config:config FEATURE_XARGS_SUPPORT_ZERO_TERM
|
|
|
|
//config: bool "Enable -0: NUL-terminated input"
|
2010-06-06 02:14:28 +00:00
|
|
|
//config: default y
|
2010-05-09 02:22:48 +00:00
|
|
|
//config: depends on XARGS
|
|
|
|
//config: help
|
|
|
|
//config: Support -0: input items are terminated by a NUL character
|
|
|
|
//config: instead of whitespace, and the quotes and backslash
|
|
|
|
//config: are not special.
|
|
|
|
|
2007-05-26 19:00:18 +00:00
|
|
|
#include "libbb.h"
|
2000-09-22 20:01:23 +00:00
|
|
|
|
2007-04-10 15:43:37 +00:00
|
|
|
/* This is a NOEXEC applet. Be very careful! */
|
|
|
|
|
|
|
|
|
2003-10-10 12:10:18 +00:00
|
|
|
/* 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)
|
2010-04-09 12:58:40 +00:00
|
|
|
# define ARG_MAX sysconf(_SC_ARG_MAX)
|
2003-10-10 12:10:18 +00:00
|
|
|
#endif
|
2010-04-09 12:58:40 +00:00
|
|
|
#if !defined(ARG_MAX)
|
|
|
|
# define ARG_MAX 470
|
2003-10-10 12:10:18 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef TEST
|
2007-04-09 21:30:53 +00:00
|
|
|
# ifndef ENABLE_FEATURE_XARGS_SUPPORT_CONFIRMATION
|
|
|
|
# define ENABLE_FEATURE_XARGS_SUPPORT_CONFIRMATION 1
|
2003-10-10 12:10:18 +00:00
|
|
|
# endif
|
2007-04-09 21:30:53 +00:00
|
|
|
# ifndef ENABLE_FEATURE_XARGS_SUPPORT_QUOTES
|
|
|
|
# define ENABLE_FEATURE_XARGS_SUPPORT_QUOTES 1
|
2003-10-10 12:10:18 +00:00
|
|
|
# endif
|
2007-04-09 21:30:53 +00:00
|
|
|
# ifndef ENABLE_FEATURE_XARGS_SUPPORT_TERMOPT
|
|
|
|
# define ENABLE_FEATURE_XARGS_SUPPORT_TERMOPT 1
|
2003-10-10 12:10:18 +00:00
|
|
|
# endif
|
2007-04-09 21:30:53 +00:00
|
|
|
# ifndef ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM
|
|
|
|
# define ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM 1
|
2003-10-10 12:10:18 +00:00
|
|
|
# endif
|
|
|
|
#endif
|
|
|
|
|
2002-11-10 21:47:17 +00:00
|
|
|
/*
|
2010-06-13 10:43:54 +00:00
|
|
|
* This function has special algorithm.
|
|
|
|
* Don't use fork and include to main!
|
|
|
|
*/
|
2007-04-09 21:32:30 +00:00
|
|
|
static int xargs_exec(char **args)
|
2002-11-10 21:47:17 +00:00
|
|
|
{
|
2006-09-29 08:20:30 +00:00
|
|
|
int status;
|
2003-10-30 22:47:16 +00:00
|
|
|
|
2007-04-09 21:32:30 +00:00
|
|
|
status = spawn_and_wait(args);
|
|
|
|
if (status < 0) {
|
2007-10-01 11:58:38 +00:00
|
|
|
bb_simple_perror_msg(args[0]);
|
2007-04-09 21:32:30 +00:00
|
|
|
return errno == ENOENT ? 127 : 126;
|
2002-11-10 21:47:17 +00:00
|
|
|
}
|
2007-04-09 21:32:30 +00:00
|
|
|
if (status == 255) {
|
2006-09-29 08:20:30 +00:00
|
|
|
bb_error_msg("%s: exited with status 255; aborting", args[0]);
|
|
|
|
return 124;
|
|
|
|
}
|
2010-03-18 21:44:00 +00:00
|
|
|
if (status >= 0x180) {
|
2006-09-29 08:20:30 +00:00
|
|
|
bb_error_msg("%s: terminated by signal %d",
|
2010-03-18 21:44:00 +00:00
|
|
|
args[0], status - 0x180);
|
2006-09-29 08:20:30 +00:00
|
|
|
return 125;
|
|
|
|
}
|
2007-04-09 21:32:30 +00:00
|
|
|
if (status)
|
2006-09-29 08:20:30 +00:00
|
|
|
return 123;
|
|
|
|
return 0;
|
2002-11-10 21:47:17 +00:00
|
|
|
}
|
|
|
|
|
2003-10-03 13:15:44 +00:00
|
|
|
|
2007-04-09 21:30:53 +00:00
|
|
|
typedef struct xlist_t {
|
|
|
|
struct xlist_t *link;
|
2010-06-13 10:43:54 +00:00
|
|
|
size_t length; /* length of xstr[] including NUL */
|
2007-04-15 08:38:50 +00:00
|
|
|
char xstr[1];
|
2003-10-10 12:10:18 +00:00
|
|
|
} xlist_t;
|
|
|
|
|
2010-06-13 01:43:43 +00:00
|
|
|
/* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space.
|
|
|
|
* "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
|
|
|
|
*/
|
|
|
|
#define ISSPACE(a) ({ unsigned char xargs__isspace = (a) - 9; xargs__isspace == (' ' - 9) || xargs__isspace <= (13 - 9); })
|
2003-10-10 12:10:18 +00:00
|
|
|
|
2007-04-09 21:30:53 +00:00
|
|
|
#if ENABLE_FEATURE_XARGS_SUPPORT_QUOTES
|
2010-06-13 01:43:43 +00:00
|
|
|
static xlist_t* process_stdin(xlist_t *list_arg,
|
2010-06-13 10:43:54 +00:00
|
|
|
const char *eof_str, size_t n_max_chars, char *buf)
|
2000-09-22 20:01:23 +00:00
|
|
|
{
|
2003-10-10 12:10:18 +00:00
|
|
|
#define NORM 0
|
|
|
|
#define QUOTE 1
|
|
|
|
#define BACKSLASH 2
|
|
|
|
#define SPACE 4
|
2010-06-13 01:43:43 +00:00
|
|
|
char *s = NULL; /* start of the word */
|
|
|
|
char *p = NULL; /* pointer to end of the word */
|
2007-04-15 08:38:50 +00:00
|
|
|
char q = '\0'; /* quote char */
|
2003-10-30 22:47:16 +00:00
|
|
|
char state = NORM;
|
|
|
|
char eof_str_detected = 0;
|
2010-06-13 01:43:43 +00:00
|
|
|
size_t line_l = 0; /* size of loaded args */
|
2003-10-30 22:47:16 +00:00
|
|
|
xlist_t *cur;
|
|
|
|
xlist_t *prev;
|
|
|
|
|
2007-04-10 21:41:16 +00:00
|
|
|
prev = cur = list_arg;
|
2010-06-13 01:43:43 +00:00
|
|
|
while (cur) {
|
2007-04-10 21:41:16 +00:00
|
|
|
prev = cur;
|
2007-04-09 21:30:53 +00:00
|
|
|
line_l += cur->length;
|
|
|
|
cur = cur->link;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
2003-10-30 22:47:16 +00:00
|
|
|
|
2010-06-13 01:43:43 +00:00
|
|
|
while (1) {
|
|
|
|
int c = getchar();
|
2003-10-30 22:47:16 +00:00
|
|
|
if (c == EOF) {
|
|
|
|
if (s)
|
|
|
|
goto unexpected_eof;
|
|
|
|
break;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
2010-06-13 01:43:43 +00:00
|
|
|
if (eof_str_detected) /* skip till EOF */
|
2003-10-30 22:47:16 +00:00
|
|
|
continue;
|
|
|
|
if (state == BACKSLASH) {
|
|
|
|
state = NORM;
|
|
|
|
goto set;
|
2010-06-13 01:43:43 +00:00
|
|
|
}
|
|
|
|
if (state == QUOTE) {
|
2007-04-15 08:38:50 +00:00
|
|
|
if (c != q)
|
2003-10-30 22:47:16 +00:00
|
|
|
goto set;
|
2007-04-15 08:38:50 +00:00
|
|
|
q = '\0';
|
|
|
|
state = NORM;
|
2007-04-12 00:32:05 +00:00
|
|
|
} else { /* if (state == NORM) */
|
2003-10-30 22:47:16 +00:00
|
|
|
if (ISSPACE(c)) {
|
|
|
|
if (s) {
|
2007-04-15 08:38:50 +00:00
|
|
|
unexpected_eof:
|
2003-10-30 22:47:16 +00:00
|
|
|
state = SPACE;
|
2007-04-15 08:38:50 +00:00
|
|
|
c = '\0';
|
2003-10-30 22:47:16 +00:00
|
|
|
goto set;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (s == NULL)
|
|
|
|
s = p = buf;
|
|
|
|
if (c == '\\') {
|
|
|
|
state = BACKSLASH;
|
|
|
|
} else if (c == '\'' || c == '"') {
|
|
|
|
q = c;
|
|
|
|
state = QUOTE;
|
|
|
|
} else {
|
2007-04-15 08:38:50 +00:00
|
|
|
set:
|
2010-06-13 10:43:54 +00:00
|
|
|
if ((size_t)(p - buf) >= n_max_chars)
|
2003-10-30 22:47:16 +00:00
|
|
|
bb_error_msg_and_die("argument line too long");
|
|
|
|
*p++ = c;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2006-01-30 13:51:50 +00:00
|
|
|
if (state == SPACE) { /* word's delimiter or EOF detected */
|
2003-10-31 08:19:44 +00:00
|
|
|
if (q) {
|
2004-03-15 08:29:22 +00:00
|
|
|
bb_error_msg_and_die("unmatched %s quote",
|
2003-10-31 08:19:44 +00:00
|
|
|
q == '\'' ? "single" : "double");
|
|
|
|
}
|
2010-06-13 01:43:43 +00:00
|
|
|
/* A full word is loaded */
|
2003-10-30 22:47:16 +00:00
|
|
|
if (eof_str) {
|
2007-04-09 21:30:53 +00:00
|
|
|
eof_str_detected = (strcmp(s, eof_str) == 0);
|
2003-10-30 22:47:16 +00:00
|
|
|
}
|
|
|
|
if (!eof_str_detected) {
|
2007-04-09 21:30:53 +00:00
|
|
|
size_t length = (p - buf);
|
2007-04-15 08:38:50 +00:00
|
|
|
/* Dont xzalloc - it can be quite big */
|
|
|
|
cur = xmalloc(offsetof(xlist_t, xstr) + length);
|
|
|
|
cur->link = NULL;
|
2007-04-09 21:30:53 +00:00
|
|
|
cur->length = length;
|
2007-04-15 08:38:50 +00:00
|
|
|
memcpy(cur->xstr, s, length);
|
2003-10-30 22:47:16 +00:00
|
|
|
if (prev == NULL) {
|
|
|
|
list_arg = cur;
|
|
|
|
} else {
|
|
|
|
prev->link = cur;
|
|
|
|
}
|
|
|
|
prev = cur;
|
2007-04-09 21:30:53 +00:00
|
|
|
line_l += length;
|
2010-06-13 10:43:54 +00:00
|
|
|
if (line_l >= n_max_chars) /* limit memory usage */
|
2003-10-30 22:47:16 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
s = NULL;
|
|
|
|
state = NORM;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
|
|
|
}
|
2003-10-30 22:47:16 +00:00
|
|
|
return list_arg;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
|
|
|
#else
|
2003-10-31 08:19:44 +00:00
|
|
|
/* The variant does not support single quotes, double quotes or backslash */
|
2010-06-13 01:43:43 +00:00
|
|
|
static xlist_t* process_stdin(xlist_t *list_arg,
|
2010-06-13 10:43:54 +00:00
|
|
|
const char *eof_str, size_t n_max_chars, char *buf)
|
2003-10-10 12:10:18 +00:00
|
|
|
{
|
2007-04-09 21:30:53 +00:00
|
|
|
char eof_str_detected = 0;
|
2010-06-13 01:43:43 +00:00
|
|
|
char *s = NULL; /* start of the word */
|
|
|
|
char *p = NULL; /* pointer to end of the word */
|
|
|
|
size_t line_l = 0; /* size of loaded args */
|
2003-10-30 22:47:16 +00:00
|
|
|
xlist_t *cur;
|
|
|
|
xlist_t *prev;
|
|
|
|
|
2007-04-10 21:41:16 +00:00
|
|
|
prev = cur = list_arg;
|
2010-06-13 01:43:43 +00:00
|
|
|
while (cur) {
|
2007-04-10 21:41:16 +00:00
|
|
|
prev = cur;
|
2007-04-09 21:30:53 +00:00
|
|
|
line_l += cur->length;
|
|
|
|
cur = cur->link;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
2003-10-30 22:47:16 +00:00
|
|
|
|
2010-06-13 01:43:43 +00:00
|
|
|
while (1) {
|
|
|
|
int c = getchar();
|
2003-10-30 22:47:16 +00:00
|
|
|
if (c == EOF) {
|
2010-06-13 01:43:43 +00:00
|
|
|
if (s == NULL)
|
|
|
|
break;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
2010-06-13 01:43:43 +00:00
|
|
|
if (eof_str_detected) { /* skip till EOF */
|
2003-10-30 22:47:16 +00:00
|
|
|
continue;
|
2010-06-13 01:43:43 +00:00
|
|
|
}
|
2003-10-30 22:47:16 +00:00
|
|
|
if (c == EOF || ISSPACE(c)) {
|
|
|
|
if (s == NULL)
|
|
|
|
continue;
|
|
|
|
c = EOF;
|
|
|
|
}
|
|
|
|
if (s == NULL)
|
|
|
|
s = p = buf;
|
2010-06-13 10:43:54 +00:00
|
|
|
if ((size_t)(p - buf) >= n_max_chars)
|
2003-10-30 22:47:16 +00:00
|
|
|
bb_error_msg_and_die("argument line too long");
|
2007-04-15 08:38:50 +00:00
|
|
|
*p++ = (c == EOF ? '\0' : c);
|
2006-01-30 13:51:50 +00:00
|
|
|
if (c == EOF) { /* word's delimiter or EOF detected */
|
2010-06-13 01:43:43 +00:00
|
|
|
/* A full word is loaded */
|
2003-10-30 22:47:16 +00:00
|
|
|
if (eof_str) {
|
2007-04-09 21:30:53 +00:00
|
|
|
eof_str_detected = (strcmp(s, eof_str) == 0);
|
2003-10-30 22:47:16 +00:00
|
|
|
}
|
|
|
|
if (!eof_str_detected) {
|
2007-04-09 21:30:53 +00:00
|
|
|
size_t length = (p - buf);
|
2007-04-15 08:38:50 +00:00
|
|
|
/* Dont xzalloc - it can be quite big */
|
|
|
|
cur = xmalloc(offsetof(xlist_t, xstr) + length);
|
|
|
|
cur->link = NULL;
|
2007-04-09 21:30:53 +00:00
|
|
|
cur->length = length;
|
2007-04-15 08:38:50 +00:00
|
|
|
memcpy(cur->xstr, s, length);
|
2003-10-30 22:47:16 +00:00
|
|
|
if (prev == NULL) {
|
|
|
|
list_arg = cur;
|
|
|
|
} else {
|
|
|
|
prev->link = cur;
|
|
|
|
}
|
|
|
|
prev = cur;
|
2007-04-09 21:30:53 +00:00
|
|
|
line_l += length;
|
2010-06-13 10:43:54 +00:00
|
|
|
if (line_l >= n_max_chars) /* limit memory usage */
|
2003-10-30 22:47:16 +00:00
|
|
|
break;
|
|
|
|
}
|
2010-06-13 01:43:43 +00:00
|
|
|
s = NULL;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
2003-10-09 11:06:45 +00:00
|
|
|
}
|
2003-10-30 22:47:16 +00:00
|
|
|
return list_arg;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
2007-04-09 21:30:53 +00:00
|
|
|
#endif /* FEATURE_XARGS_SUPPORT_QUOTES */
|
2003-10-10 12:10:18 +00:00
|
|
|
|
2007-04-09 21:30:53 +00:00
|
|
|
#if ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM
|
2010-06-13 01:43:43 +00:00
|
|
|
static xlist_t* process0_stdin(xlist_t *list_arg,
|
2010-06-13 10:43:54 +00:00
|
|
|
const char *eof_str UNUSED_PARAM, size_t n_max_chars, char *buf)
|
2003-10-10 12:10:18 +00:00
|
|
|
{
|
2010-06-13 01:43:43 +00:00
|
|
|
char *s = NULL; /* start of the word */
|
|
|
|
char *p = NULL; /* pointer to end of the word */
|
|
|
|
size_t line_l = 0; /* size of loaded args */
|
2003-10-30 22:47:16 +00:00
|
|
|
xlist_t *cur;
|
|
|
|
xlist_t *prev;
|
|
|
|
|
2007-04-10 21:41:16 +00:00
|
|
|
prev = cur = list_arg;
|
2010-06-13 01:43:43 +00:00
|
|
|
while (cur) {
|
2007-04-10 21:41:16 +00:00
|
|
|
prev = cur;
|
2007-04-09 21:30:53 +00:00
|
|
|
line_l += cur->length;
|
|
|
|
cur = cur->link;
|
2003-10-09 11:06:45 +00:00
|
|
|
}
|
2003-10-30 22:47:16 +00:00
|
|
|
|
2010-06-13 01:43:43 +00:00
|
|
|
while (1) {
|
|
|
|
int c = getchar();
|
2003-10-30 22:47:16 +00:00
|
|
|
if (c == EOF) {
|
|
|
|
if (s == NULL)
|
|
|
|
break;
|
2007-04-15 08:38:50 +00:00
|
|
|
c = '\0';
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
2003-10-30 22:47:16 +00:00
|
|
|
if (s == NULL)
|
|
|
|
s = p = buf;
|
2010-06-13 10:43:54 +00:00
|
|
|
if ((size_t)(p - buf) >= n_max_chars)
|
2003-10-30 22:47:16 +00:00
|
|
|
bb_error_msg_and_die("argument line too long");
|
|
|
|
*p++ = c;
|
2007-04-15 08:38:50 +00:00
|
|
|
if (c == '\0') { /* word's delimiter or EOF detected */
|
2010-06-13 01:43:43 +00:00
|
|
|
/* A full word is loaded */
|
2007-04-09 21:30:53 +00:00
|
|
|
size_t length = (p - buf);
|
2007-04-15 08:38:50 +00:00
|
|
|
/* Dont xzalloc - it can be quite big */
|
|
|
|
cur = xmalloc(offsetof(xlist_t, xstr) + length);
|
|
|
|
cur->link = NULL;
|
2007-04-09 21:30:53 +00:00
|
|
|
cur->length = length;
|
2007-04-15 08:38:50 +00:00
|
|
|
memcpy(cur->xstr, s, length);
|
2003-10-30 22:47:16 +00:00
|
|
|
if (prev == NULL) {
|
|
|
|
list_arg = cur;
|
|
|
|
} else {
|
|
|
|
prev->link = cur;
|
|
|
|
}
|
|
|
|
prev = cur;
|
2007-04-09 21:30:53 +00:00
|
|
|
line_l += length;
|
2010-06-13 10:43:54 +00:00
|
|
|
if (line_l >= n_max_chars) /* limit memory usage */
|
2003-10-30 22:47:16 +00:00
|
|
|
break;
|
|
|
|
s = NULL;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
2003-10-04 14:44:27 +00:00
|
|
|
}
|
2003-10-30 22:47:16 +00:00
|
|
|
return list_arg;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
2007-04-09 21:30:53 +00:00
|
|
|
#endif /* FEATURE_XARGS_SUPPORT_ZERO_TERM */
|
2003-10-10 12:10:18 +00:00
|
|
|
|
2010-06-13 10:43:54 +00:00
|
|
|
#if ENABLE_FEATURE_XARGS_SUPPORT_CONFIRMATION
|
|
|
|
/* Prompt the user for a response, and
|
|
|
|
if the user responds affirmatively, return true;
|
|
|
|
otherwise, return false. Uses "/dev/tty", not stdin. */
|
|
|
|
static int xargs_ask_confirmation(void)
|
|
|
|
{
|
|
|
|
FILE *tty_stream;
|
|
|
|
int c, savec;
|
|
|
|
|
|
|
|
tty_stream = xfopen_for_read(CURRENT_TTY);
|
|
|
|
fputs(" ?...", stderr);
|
|
|
|
fflush_all();
|
|
|
|
c = savec = getc(tty_stream);
|
|
|
|
while (c != EOF && c != '\n')
|
|
|
|
c = getc(tty_stream);
|
|
|
|
fclose(tty_stream);
|
|
|
|
return (savec == 'y' || savec == 'Y');
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
# define xargs_ask_confirmation() 1
|
|
|
|
#endif
|
|
|
|
|
2006-09-29 08:20:30 +00:00
|
|
|
/* Correct regardless of combination of CONFIG_xxx */
|
|
|
|
enum {
|
|
|
|
OPTBIT_VERBOSE = 0,
|
|
|
|
OPTBIT_NO_EMPTY,
|
|
|
|
OPTBIT_UPTO_NUMBER,
|
|
|
|
OPTBIT_UPTO_SIZE,
|
|
|
|
OPTBIT_EOF_STRING,
|
2008-08-04 21:30:55 +00:00
|
|
|
OPTBIT_EOF_STRING1,
|
2009-04-21 11:09:40 +00:00
|
|
|
IF_FEATURE_XARGS_SUPPORT_CONFIRMATION(OPTBIT_INTERACTIVE,)
|
|
|
|
IF_FEATURE_XARGS_SUPPORT_TERMOPT( OPTBIT_TERMINATE ,)
|
|
|
|
IF_FEATURE_XARGS_SUPPORT_ZERO_TERM( OPTBIT_ZEROTERM ,)
|
2006-09-29 08:20:30 +00:00
|
|
|
|
2008-08-04 21:30:55 +00:00
|
|
|
OPT_VERBOSE = 1 << OPTBIT_VERBOSE ,
|
|
|
|
OPT_NO_EMPTY = 1 << OPTBIT_NO_EMPTY ,
|
|
|
|
OPT_UPTO_NUMBER = 1 << OPTBIT_UPTO_NUMBER,
|
|
|
|
OPT_UPTO_SIZE = 1 << OPTBIT_UPTO_SIZE ,
|
|
|
|
OPT_EOF_STRING = 1 << OPTBIT_EOF_STRING , /* GNU: -e[<param>] */
|
|
|
|
OPT_EOF_STRING1 = 1 << OPTBIT_EOF_STRING1, /* SUS: -E<param> */
|
2009-04-21 11:09:40 +00:00
|
|
|
OPT_INTERACTIVE = IF_FEATURE_XARGS_SUPPORT_CONFIRMATION((1 << OPTBIT_INTERACTIVE)) + 0,
|
|
|
|
OPT_TERMINATE = IF_FEATURE_XARGS_SUPPORT_TERMOPT( (1 << OPTBIT_TERMINATE )) + 0,
|
|
|
|
OPT_ZEROTERM = IF_FEATURE_XARGS_SUPPORT_ZERO_TERM( (1 << OPTBIT_ZEROTERM )) + 0,
|
2006-09-29 08:20:30 +00:00
|
|
|
};
|
2008-08-04 21:30:55 +00:00
|
|
|
#define OPTION_STR "+trn:s:e::E:" \
|
2009-04-21 11:09:40 +00:00
|
|
|
IF_FEATURE_XARGS_SUPPORT_CONFIRMATION("p") \
|
|
|
|
IF_FEATURE_XARGS_SUPPORT_TERMOPT( "x") \
|
|
|
|
IF_FEATURE_XARGS_SUPPORT_ZERO_TERM( "0")
|
2000-09-22 20:22:28 +00:00
|
|
|
|
2007-10-11 10:05:36 +00:00
|
|
|
int xargs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
2003-10-30 22:47:16 +00:00
|
|
|
int xargs_main(int argc, char **argv)
|
2003-10-10 12:10:18 +00:00
|
|
|
{
|
2003-10-30 22:47:16 +00:00
|
|
|
xlist_t *list = NULL;
|
|
|
|
int child_error = 0;
|
2010-06-13 01:43:43 +00:00
|
|
|
char *max_args;
|
|
|
|
char *max_chars;
|
|
|
|
char *buf;
|
2003-10-30 22:47:16 +00:00
|
|
|
int n_max_arg;
|
2008-08-04 21:30:55 +00:00
|
|
|
const char *eof_str = NULL;
|
2006-10-03 21:00:06 +00:00
|
|
|
unsigned opt;
|
2003-10-30 22:47:16 +00:00
|
|
|
size_t n_max_chars;
|
2006-09-29 08:20:30 +00:00
|
|
|
#if ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM
|
|
|
|
xlist_t* (*read_args)(xlist_t*, const char*, size_t, char*) = process_stdin;
|
|
|
|
#else
|
|
|
|
#define read_args process_stdin
|
2003-10-10 12:10:18 +00:00
|
|
|
#endif
|
2002-11-10 21:47:17 +00:00
|
|
|
|
2008-08-04 21:30:55 +00:00
|
|
|
opt = getopt32(argv, OPTION_STR, &max_args, &max_chars, &eof_str, &eof_str);
|
2003-10-10 12:10:18 +00:00
|
|
|
|
2008-08-04 21:30:55 +00:00
|
|
|
/* -E ""? You may wonder why not just omit -E?
|
|
|
|
* This is used for portability:
|
|
|
|
* old xargs was using "_" as default for -E / -e */
|
|
|
|
if ((opt & OPT_EOF_STRING1) && eof_str[0] == '\0')
|
2008-08-03 19:12:25 +00:00
|
|
|
eof_str = NULL;
|
|
|
|
|
2006-09-29 08:20:30 +00:00
|
|
|
if (opt & OPT_ZEROTERM)
|
2009-04-21 11:09:40 +00:00
|
|
|
IF_FEATURE_XARGS_SUPPORT_ZERO_TERM(read_args = process0_stdin);
|
2003-10-30 22:47:16 +00:00
|
|
|
|
|
|
|
argv += optind;
|
2007-04-09 21:30:53 +00:00
|
|
|
argc -= optind;
|
2010-06-13 01:43:43 +00:00
|
|
|
if (!argv[0]) {
|
2003-10-30 22:47:16 +00:00
|
|
|
/* default behavior is to echo all the filenames */
|
2010-06-13 01:43:43 +00:00
|
|
|
*--argv = (char*)"echo";
|
2006-09-29 08:20:30 +00:00
|
|
|
argc++;
|
2003-10-30 22:47:16 +00:00
|
|
|
}
|
|
|
|
|
2010-04-09 12:58:40 +00:00
|
|
|
/* The Open Group Base Specifications Issue 6:
|
|
|
|
* "The xargs utility shall limit the command line length such that
|
|
|
|
* when the command line is invoked, the combined argument
|
|
|
|
* and environment lists (see the exec family of functions
|
|
|
|
* in the System Interfaces volume of IEEE Std 1003.1-2001)
|
|
|
|
* shall not exceed {ARG_MAX}-2048 bytes".
|
|
|
|
*/
|
2010-06-13 01:43:43 +00:00
|
|
|
n_max_chars = ARG_MAX; /* might be calling sysconf(_SC_ARG_MAX) */
|
|
|
|
if (n_max_chars < 4*1024); /* paranoia */
|
|
|
|
n_max_chars = 4*1024;
|
2010-04-09 12:58:40 +00:00
|
|
|
n_max_chars -= 2048;
|
|
|
|
/* Sanity check for systems with huge ARG_MAX defines (e.g., Suns which
|
2010-06-13 01:43:43 +00:00
|
|
|
* 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.
|
2010-04-09 12:58:40 +00:00
|
|
|
*/
|
|
|
|
if (n_max_chars > 20 * 1024)
|
|
|
|
n_max_chars = 20 * 1024;
|
2006-09-29 08:20:30 +00:00
|
|
|
|
|
|
|
if (opt & OPT_UPTO_SIZE) {
|
2010-06-13 01:43:43 +00:00
|
|
|
int i;
|
2010-04-09 12:58:40 +00:00
|
|
|
size_t n_chars = 0;
|
2010-06-13 01:44:27 +00:00
|
|
|
n_max_chars = xatoul_range(max_chars, 1, INT_MAX);
|
2010-06-13 01:43:43 +00:00
|
|
|
for (i = 0; argv[i]; i++) {
|
|
|
|
n_chars += strlen(argv[i]) + 1;
|
2003-10-30 22:47:16 +00:00
|
|
|
}
|
2010-06-13 01:43:43 +00:00
|
|
|
n_max_chars -= n_chars;
|
|
|
|
if ((ssize_t)n_max_chars <= 0) {
|
2009-11-13 08:08:27 +00:00
|
|
|
bb_error_msg_and_die("can't fit single argument within argument list size limit");
|
2003-10-30 22:47:16 +00:00
|
|
|
}
|
2003-10-04 14:44:27 +00:00
|
|
|
}
|
2010-06-13 01:43:43 +00:00
|
|
|
|
|
|
|
buf = xmalloc(n_max_chars);
|
2003-10-30 22:47:16 +00:00
|
|
|
|
2006-09-29 08:20:30 +00:00
|
|
|
if (opt & OPT_UPTO_NUMBER) {
|
2006-10-08 12:49:22 +00:00
|
|
|
n_max_arg = xatoul_range(max_args, 1, INT_MAX);
|
2010-06-13 10:43:54 +00:00
|
|
|
if (n_max_arg < n_max_chars)
|
|
|
|
goto skip;
|
2003-10-04 14:44:27 +00:00
|
|
|
}
|
2010-06-13 10:43:54 +00:00
|
|
|
n_max_arg = n_max_chars;
|
|
|
|
skip:
|
2003-10-10 12:10:18 +00:00
|
|
|
|
2010-06-13 01:43:43 +00:00
|
|
|
while ((list = read_args(list, eof_str, n_max_chars, buf)) != NULL
|
|
|
|
|| !(opt & OPT_NO_EMPTY)
|
|
|
|
) {
|
|
|
|
char **args;
|
|
|
|
xlist_t *cur;
|
|
|
|
int i, n;
|
2010-06-13 10:43:54 +00:00
|
|
|
size_t n_chars;
|
2010-06-13 01:43:43 +00:00
|
|
|
|
2003-10-30 22:47:16 +00:00
|
|
|
opt |= OPT_NO_EMPTY;
|
2010-06-13 10:43:54 +00:00
|
|
|
|
|
|
|
/* take args from list, not exceeding arg and char limits */
|
|
|
|
n_chars = 0;
|
2003-10-30 22:47:16 +00:00
|
|
|
n = 0;
|
2010-06-13 10:43:54 +00:00
|
|
|
for (cur = list; cur; cur = cur->link) {
|
2007-04-09 21:30:53 +00:00
|
|
|
n_chars += cur->length;
|
2010-06-13 10:43:54 +00:00
|
|
|
if (n_chars > n_max_chars || n >= n_max_arg) {
|
2003-10-30 22:47:16 +00:00
|
|
|
if (opt & OPT_TERMINATE)
|
|
|
|
bb_error_msg_and_die("argument list too long");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
n++;
|
|
|
|
}
|
|
|
|
|
2010-06-13 01:43:43 +00:00
|
|
|
/* allocate pointers for execvp */
|
|
|
|
args = xzalloc(sizeof(args[0]) * (argc + n + 1));
|
2003-10-30 22:47:16 +00:00
|
|
|
|
2006-09-29 08:20:30 +00:00
|
|
|
/* store the command to be executed
|
2010-06-13 01:43:43 +00:00
|
|
|
* (taken from the command line) */
|
|
|
|
for (i = 0; argv[i]; i++)
|
2003-10-30 22:47:16 +00:00
|
|
|
args[i] = argv[i];
|
|
|
|
/* (taken from stdin) */
|
|
|
|
for (cur = list; n; cur = cur->link) {
|
2007-04-15 08:38:50 +00:00
|
|
|
args[i++] = cur->xstr;
|
2003-10-30 22:47:16 +00:00
|
|
|
n--;
|
|
|
|
}
|
2003-10-10 12:10:18 +00:00
|
|
|
|
2006-09-29 08:20:30 +00:00
|
|
|
if (opt & (OPT_INTERACTIVE | OPT_VERBOSE)) {
|
2003-10-30 22:47:16 +00:00
|
|
|
for (i = 0; args[i]; i++) {
|
|
|
|
if (i)
|
2010-06-06 19:53:09 +00:00
|
|
|
bb_putchar_stderr(' ');
|
2003-10-30 22:47:16 +00:00
|
|
|
fputs(args[i], stderr);
|
|
|
|
}
|
2006-09-29 08:20:30 +00:00
|
|
|
if (!(opt & OPT_INTERACTIVE))
|
2010-06-06 19:53:09 +00:00
|
|
|
bb_putchar_stderr('\n');
|
2003-10-30 22:47:16 +00:00
|
|
|
}
|
2010-06-13 01:43:43 +00:00
|
|
|
|
2006-09-29 08:20:30 +00:00
|
|
|
if (!(opt & OPT_INTERACTIVE) || xargs_ask_confirmation()) {
|
2003-10-30 22:47:16 +00:00
|
|
|
child_error = xargs_exec(args);
|
2000-09-26 01:00:15 +00:00
|
|
|
}
|
2003-10-04 14:44:27 +00:00
|
|
|
|
2010-06-13 10:43:54 +00:00
|
|
|
/* remove list elements which we consumed */
|
2006-09-29 08:20:30 +00:00
|
|
|
for (i = argc; args[i]; i++) {
|
2003-10-30 22:47:16 +00:00
|
|
|
cur = list;
|
|
|
|
list = list->link;
|
|
|
|
free(cur);
|
|
|
|
}
|
|
|
|
free(args);
|
2010-06-13 01:43:43 +00:00
|
|
|
|
2003-10-30 22:47:16 +00:00
|
|
|
if (child_error > 0 && child_error != 123) {
|
|
|
|
break;
|
|
|
|
}
|
2008-06-15 05:40:56 +00:00
|
|
|
} /* while */
|
2010-06-13 01:43:43 +00:00
|
|
|
|
2007-04-09 21:30:53 +00:00
|
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
2010-06-13 01:43:43 +00:00
|
|
|
free(buf);
|
|
|
|
|
2003-10-30 22:47:16 +00:00
|
|
|
return child_error;
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef TEST
|
|
|
|
|
2006-10-03 21:00:43 +00:00
|
|
|
const char *applet_name = "debug stuff usage";
|
2003-10-10 12:10:18 +00:00
|
|
|
|
|
|
|
void bb_show_usage(void)
|
|
|
|
{
|
2004-03-15 08:29:22 +00:00
|
|
|
fprintf(stderr, "Usage: %s [-p] [-r] [-t] -[x] [-n max_arg] [-s max_chars]\n",
|
2006-10-03 21:00:43 +00:00
|
|
|
applet_name);
|
2008-05-19 09:29:47 +00:00
|
|
|
exit(EXIT_FAILURE);
|
2003-10-10 12:10:18 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
|
|
{
|
2003-10-30 22:47:16 +00:00
|
|
|
return xargs_main(argc, argv);
|
2000-09-22 20:01:23 +00:00
|
|
|
}
|
2003-10-31 08:19:44 +00:00
|
|
|
#endif /* TEST */
|