+/* vi: set sw=4 ts=4: */
/*
* Mini xargs implementation for busybox
* Options are supported: "-prtx -n max_arg -s max_chars -e[ouf_str]"
* (C) 2002,2003 by Vladimir Oleynik <dzo@simtreas.ru>
*
* Special thanks
- * - Mark Whitley and Glenn McGrath for stimul to rewrote :)
+ * - Mark Whitley and Glenn McGrath for stimulus to rewrite :)
* - Mike Rendell <michael@cs.mun.ca>
* and David MacKenzie <djm@gnu.ai.mit.edu>.
*
- * 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.
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*
- * 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
+ * xargs is described in the Single Unix Specification v3 at
+ * http://www.opengroup.org/onlinepubs/007904975/utilities/xargs.html
*
*/
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#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.
#endif
/*
- This function have special algorithm.
- Don`t use fork and include to main!
+ This function has special algorithm.
+ Don't use fork and include to main!
*/
-static int
-xargs_exec (char *const *args)
+static int xargs_exec(char *const *args)
{
- pid_t p;
- volatile int exec_errno = 0; /* shared vfork stack */
+ pid_t p;
+ volatile int exec_errno = 0; /* shared vfork stack */
+ int status;
+
+ p = vfork();
+ if (p < 0)
+ bb_perror_msg_and_die("vfork");
- 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 -- child */
+ execvp(args[0], args);
+ exec_errno = errno; /* set error to shared stack */
+ _exit(1);
+ }
- while (wait (&status) == (pid_t) - 1)
+ /* vfork -- parent */
+ while (wait(&status) == (pid_t) -1)
if (errno != EINTR)
- break;
- if (exec_errno) {
+ break;
+ if (exec_errno) {
errno = exec_errno;
- bb_perror_msg ("%s", args[0]);
+ 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 (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");
- }
+ if (WEXITSTATUS(status) == 255) {
+ bb_error_msg("%s: exited with status 255; aborting", args[0]);
+ return 124;
+ }
+ 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))
+ return 123;
+ return 0;
}
static int eof_stdin_detected;
#define ISBLANK(c) ((c) == ' ' || (c) == '\t')
-#define ISSPACE(c) (ISBLANK (c) || (c) == '\n' || (c) == '\r' \
+#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)
+static xlist_t *process_stdin(xlist_t * list_arg,
+ const char *eof_str, size_t mc, char *buf)
{
#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;
+ 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;
}
- 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;
+
+ while (!eof_stdin_detected) {
+ c = getchar();
+ if (c == EOF) {
+ eof_stdin_detected++;
+ if (s)
+ goto unexpected_eof;
+ break;
}
- } else {
- if (s == NULL)
- s = p = buf;
- if (c == '\\') {
- state = BACKSLASH;
- } else if (c == '\'' || c == '"') {
- q = c;
- state = QUOTE;
- } else {
+ 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 ((size_t)(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);
+
+ 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;
}
- }
- }
- 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);
-
- 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;
+ 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)
+/* The variant does not support single quotes, double quotes or backslash */
+static xlist_t *process_stdin(xlist_t * list_arg,
+ const char *eof_str, size_t mc, char *buf)
{
- 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;
-
- 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(eof_str_detected)
- continue;
- if (c == EOF || ISSPACE (c)) {
- if(s == NULL)
- continue;
- c = EOF;
+ 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;
+
+ for (prev = cur = list_arg; cur; cur = cur->link) {
+ line_l += cur->lenght; /* previous allocated */
+ if (prev != cur)
+ prev = prev->link;
}
- 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);
-
- 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;
+
+ 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;
}
- prev = cur;
- line_l += lenght;
- if(line_l > mc) {
- /* stop memory usage :-) */
- break;
+ 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);
+
+ 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;
+ }
}
- s = NULL;
- }
}
- }
- return list_arg;
+ return list_arg;
}
#endif /* CONFIG_FEATURE_XARGS_SUPPORT_QUOTES */
/* 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 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;
+ static FILE *tty_stream;
+ int c, savec;
+
+ if (!tty_stream) {
+ tty_stream = xfopen(CURRENT_TTY, "r");
+ /* 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
-# 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
-# define OPT_INC_X 0
-#endif
+#endif /* CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION */
#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)
+static xlist_t *process0_stdin(xlist_t * list_arg, const char *eof_str ATTRIBUTE_UNUSED,
+ 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;
+ 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;
}
- 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;
+
+ while (!eof_stdin_detected) {
+ c = getchar();
+ if (c == EOF) {
+ eof_stdin_detected++;
+ if (s == NULL)
+ break;
+ c = 0;
}
- prev = cur;
- line_l += lenght;
- if(line_l > mc) {
- /* stop memory usage :-) */
- break;
+ if (s == NULL)
+ s = p = buf;
+ if ((size_t)(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;
}
- s = NULL;
}
- }
- return list_arg;
+ 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)
+#endif /* CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM */
+
+/* Correct regardless of combination of CONFIG_xxx */
+enum {
+ OPTBIT_VERBOSE = 0,
+ OPTBIT_NO_EMPTY,
+ OPTBIT_UPTO_NUMBER,
+ OPTBIT_UPTO_SIZE,
+ OPTBIT_EOF_STRING,
+ USE_FEATURE_XARGS_SUPPORT_CONFIRMATION(OPTBIT_INTERACTIVE,)
+ USE_FEATURE_XARGS_SUPPORT_TERMOPT( OPTBIT_TERMINATE ,)
+ USE_FEATURE_XARGS_SUPPORT_ZERO_TERM( OPTBIT_ZEROTERM ,)
+
+ 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 ,
+ OPT_INTERACTIVE = USE_FEATURE_XARGS_SUPPORT_CONFIRMATION((1<<OPTBIT_INTERACTIVE)) + 0,
+ OPT_TERMINATE = USE_FEATURE_XARGS_SUPPORT_TERMOPT( (1<<OPTBIT_TERMINATE )) + 0,
+ OPT_ZEROTERM = USE_FEATURE_XARGS_SUPPORT_ZERO_TERM( (1<<OPTBIT_ZEROTERM )) + 0,
+};
+#define OPTION_STR "+trn:s:e::" \
+ USE_FEATURE_XARGS_SUPPORT_CONFIRMATION("p") \
+ USE_FEATURE_XARGS_SUPPORT_TERMOPT( "x") \
+ USE_FEATURE_XARGS_SUPPORT_ZERO_TERM( "0")
+
+int xargs_main(int argc, char **argv)
+{
+ char **args;
+ int i, 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 opt;
+ size_t n_max_chars;
+#if ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM
+ xlist_t* (*read_args)(xlist_t*, const char*, size_t, char*) = process_stdin;
#else
-#define OPT_INTERACTIVE (0) /* require for algorithm &| */
+#define read_args process_stdin
#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))
-*/
-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
+ opt = getopt32(argc, argv, OPTION_STR, &max_args, &max_chars, &eof_str);
-#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
- bb_opt_complementaly = "pt";
-#endif
+ if (opt & OPT_ZEROTERM)
+ USE_FEATURE_XARGS_SUPPORT_ZERO_TERM(read_args = process0_stdin);
- 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++) {
- n_chars += strlen (*argv) + 1;
+ argc -= optind;
+ argv += optind;
+ if (!argc) {
+ /* default behavior is to echo all the filenames */
+ *argv = "echo";
+ argc++;
}
- if (n_max_chars < n_chars) {
- bb_error_msg_and_die
- ("can not fit single argument within argument list size limit");
+
+ 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 < argc; i++) {
+ n_chars += strlen(*argv) + 1;
+ }
+ 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;
}
- 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);
-
- if ((opt & OPT_UPTO_NUMBER)) {
- n_max_arg = bb_xgetularg10_bnd (max_args, 1, INT_MAX);
- } else {
- n_max_arg = n_max_chars;
- }
+ max_chars = xmalloc(n_max_chars);
-#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
- if(opt & OPT_ZEROTERM)
- read_args = process0_stdin;
-#endif
+ if (opt & OPT_UPTO_NUMBER) {
+ n_max_arg = bb_xgetularg10_bnd(max_args, 1, INT_MAX);
+ } else {
+ n_max_arg = n_max_chars;
+ }
- 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;
+ while ((list = read_args(list, eof_str, n_max_chars, max_chars)) != NULL ||
+ !(opt & OPT_NO_EMPTY))
+ {
+ 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;
- }
- }
+ 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
- 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:
- a*arg, n*arg 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--;
- }
+ 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 */
+
+ /* allocate pointers for execvp:
+ argc*arg, n*arg from stdin, NULL */
+ args = xzalloc((n + argc + 1) * sizeof(char *));
+
+ /* store the command to be executed
+ (taken from the command line) */
+ for (i = 0; i < argc; 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);
+ if (opt & (OPT_INTERACTIVE | OPT_VERBOSE)) {
+ for (i = 0; args[i]; i++) {
+ if (i)
+ fputc(' ', stderr);
+ fputs(args[i], stderr);
+ }
+ if (!(opt & OPT_INTERACTIVE))
+ fputc('\n', stderr);
+ }
+ if (!(opt & OPT_INTERACTIVE) || xargs_ask_confirmation()) {
+ child_error = xargs_exec(args);
}
- 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;
+ /* clean up */
+ for (i = argc; 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(max_chars);
-#endif
- return child_error;
+ if (ENABLE_FEATURE_CLEAN_UP) free(max_chars);
+ return child_error;
}
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);
+ 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);
+ return xargs_main(argc, argv);
}
-#endif /* TEST */
+#endif /* TEST */
projects / oweals / busybox.git / blobdiff