#ifdef BB_FEATURE_LS_FILETYPES
"p"
#endif
+#ifdef BB_FEATURE_LS_FOLLOWLINKS
+ "L"
+#endif
#ifdef BB_FEATURE_LS_RECURSIVE
"R"
#endif
#ifdef BB_FEATURE_LS_FILETYPES
"\t-p\tappend indicator (one of /=@|) to entries\n"
#endif
+#ifdef BB_FEATURE_LS_FOLLOWLINKS
+ "\t-L\tlist entries pointed to by symbolic links\n"
+#endif
#ifdef BB_FEATURE_LS_RECURSIVE
"\t-R\tlist subdirectories recursively\n"
#endif
#endif
#if defined BB_XARGS
-const char xargs_usage[] =
- "xargs [-0prtx] [-e[eof-str]] [-i[replace-str]] [-l[max-lines]]\n"
- "[-n max-args] [-s max-chars] [-P max-procs] [--null] [--eof[=eof-str]]\n"
- "[--replace[=replace-str]] [--max-lines[=max-lines]] [--interactive]\n"
- "[--max-chars=max-chars] [--verbose] [--exit] [--max-procs=max-procs]\n"
- "[--max-args=max-args] [--no-run-if-empty] [--help]\n"
- "[command [initial-arguments]]\n"
- "\nBuild and execute command on lines from standard input.\n";
+const char xargs_usage[] = "xargs [OPTIONS] [COMMAND] [ARGS...]\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+ "\nExecutes COMMAND on every item given by standard input.\n\n"
+ "Options:\n"
+ "\t-t\tPrint the command just before it is run\n"
+ "\t-l LEN\tUse LEN as maximum line length (default 490, max 1023)\n"
+ "\t-e ENDING\tAppend ENDING to the command before executing it.\n"
+#endif
+ ;
#endif
#if defined BB_YES
ping, poweroff, printf, ps, pwd, rdate, reboot, renice, reset, rm, rmdir,
rmmod, sed, setkeycodes, sh, sleep, sort, swapoff, swapon, sync, syslogd, tail,
tar, tee, telnet, test, touch, tr, true, tty, umount, uname, uniq, unix2dos,
-unrpm, update, uptime, usleep, uudecode, uuencode, wc, which, whoami, yes,
-zcat, [
+unrpm, update, uptime, usleep, uudecode, uuencode, wc, which, whoami, xargs,
+yes, zcat, [
-------------------------------
=item ls
-Usage: ls [B<-1acdelnpuxACFR>] [filenames...]
+Usage: ls [B<-1acdelnpuxACFLR>] [filenames...]
Options:
-C list entries by columns
-F append indicator (one of */=@|) to entries
-R list subdirectories recursively
+ -L list entries pointed to by symbolic links
-------------------------------
-------------------------------
+=item xargs
+
+Usage: xargs [OPTIONS] [COMMAND] [ARGS...]
+
+Executes COMMAND on every item given by standard input.
+
+Options:
+
+ -t Print the command just before it is run
+ -l LEN Use LEN as maximum line length (default 490, max 1023)
+ -e ENDING Append ENDING to the command before executing it.
+
+Example:
+
+ $ ls | xargs gzip
+ $ find . -name '*.c' -print | xargs rm
+
+-------------------------------
+
=item yes
Usage: yes [OPTION]... [STRING]...
=cut
-# $Id: busybox.pod,v 1.70 2000/09/21 02:06:35 andersen Exp $
+# $Id: busybox.pod,v 1.71 2000/09/22 20:22:27 andersen Exp $
-A Do not list implied . and ..
-C List entries by columns
-F Append indicator (one of */=@|) to entries
+ -L list entries pointed to by symbolic links
-R List subdirectories recursively
</screen>
</para>
</para>
</sect1>
+ <sect1 id="xargs">
+ <title>xargs</title>
+
+ <para>
+ Usage: xargs [OPTIONS] [COMMAND] [ARGS...]
+ </para>
+
+ <para>
+ Executes COMMAND on every item given by standard input.
+ </para>
+
+ <para>
+ Options:
+ </para>
+
+ <para>
+ <screen>
+ -t Print the command just before it is run
+ -l LEN Use LEN as maximum line length (default 490, max 1023)
+ -e ENDING Append ENDING to the command before executing it.
+ </screen>
+ </para>
+
+
+ <para>
+ Example:
+ </para>
+
+ <para>
+ <screen>
+ $ ls | xargs gzip
+ $ find . -name '*.c' -print | xargs rm
+ </screen>
+ </para>
+ </sect1>
+
<sect1 id="yes">
<title>yes</title>
-/* xargs for busybox -- using GNU xargs till we can get something
- * better. minix xargs is a bit smaller... */
+/* minix xargs - Make and execute commands
+ * Author: Ian Nicholls: 1 Mar 90 */
+
+/*
+ * xargs - Accept words from stdin until, combined with the arguments
+ * given on the command line, just fit into the command line limit.
+ * Then, execute the result.
+ * e.g. ls | xargs compress
+ * find . -name '*.s' -print | xargs ar qv libc.a
+ *
+ * flags: -t Print the command just before it is run
+ * -l len Use len as maximum line length (default 490, max 1023)
+ * -e ending Append ending to the command before executing it.
+ *
+ * Exits with: 0 No errors.
+ * 1 If any system(3) call returns a nonzero status.
+ * 2 Usage error
+ * 3 Line length too short to contain some single argument.
+ *
+ * Examples: xargs ar qv libc.a < liborder # Create a new libc.a
+ * find . -name '*.s' -print | xargs rm # Remove all .s files
+ * find . -type f ! -name '*.Z' \ # Compress old files.
+ * -atime +60 -print | xargs compress -v
+ *
+ * Bugs: If the command contains unquoted wildflags, then the system(3) call
+ * call may expand this to larger than the maximum line size.
+ * The command is not executed if nothing was read from stdin.
+ * xargs may give up too easily when the command returns nonzero.
+ */
+#define USAGE "usage: xargs [-t] [-l len] [-e endargs] command [args...]\n"
-/* xargs -- build and execute command lines from standard input
- Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
-
- 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, or (at your option)
- any later version.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* Written by Mike Rendell <michael@cs.mun.ca>
- and David MacKenzie <djm@gnu.ai.mit.edu>. */
-
-#include "internal.h"
-
-#define HAVE_STRING_H 1
-#define HAVE_SYS_WAIT_H 1
-#define HAVE_UNISTD_H 1
-#define HAVE_LIMITS_H 1
-#define STDC_HEADERS 1
-
-#include <sys/types.h> /* For pid_t. */
-#if HAVE_SYS_WAIT_H
-#include <sys/wait.h>
-#endif
-
-#ifndef WIFSTOPPED
-#define WIFSTOPPED(w) (((w) & 0xff) == 0x7f)
-#endif
-#ifndef WIFSIGNALED
-#define WIFSIGNALED(w) (((w) & 0xff) != 0x7f && ((w) & 0xff) != 0)
-#endif
-#ifndef WIFEXITED
-#define WIFEXITED(w) (((w) & 0xff) == 0)
-#endif
-
-#ifndef WSTOPSIG
-#define WSTOPSIG(w) (((w) >> 8) & 0xff)
-#endif
-#ifndef WTERMSIG
-#define WTERMSIG(w) ((w) & 0x7f)
-#endif
-#ifndef WEXITSTATUS
-#define WEXITSTATUS(w) (((w) >> 8) & 0xff)
-#endif
-
-#if __STDC__
-#define P_(s) s
-#else
-#define P_(s) ()
-#endif
-
-#include <ctype.h>
-
-#if !defined (isascii) || defined (STDC_HEADERS)
-#ifdef isascii
-#undef isascii
-#endif
-#define isascii(c) 1
-#endif
-
-#ifdef isblank
-#define ISBLANK(c) (isascii (c) && isblank (c))
-#else
-#define ISBLANK(c) ((c) == ' ' || (c) == '\t')
-#endif
-
-#define ISSPACE(c) (ISBLANK (c) || (c) == '\n' || (c) == '\r' \
- || (c) == '\f' || (c) == '\v')
-
-#include <stdio.h>
#include <errno.h>
-#include <getopt.h>
-
-#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
+#include <stdlib.h>
#include <string.h>
-#if !defined(STDC_HEADERS)
-#include <memory.h>
-#endif
-#else
-#include <strings.h>
-#define memcpy(dest, source, count) (bcopy((source), (dest), (count)))
-#endif
-
-#ifndef _POSIX_SOURCE
-#include <sys/param.h>
-#endif
-
-#ifdef HAVE_LIMITS_H
-#include <limits.h>
-#endif
-
-#ifndef LONG_MAX
-#define LONG_MAX (~(1 << (sizeof (long) * 8 - 1)))
-#endif
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#include <signal.h>
-
-#if !defined(SIGCHLD) && defined(SIGCLD)
-#define SIGCHLD SIGCLD
-#endif
-
-/* 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 NCARGS
-#endif
-
-/* States for read_line. */
-#define NORM 0
-#define SPACE 1
-#define QUOTE 2
-#define BACKSLASH 3
+#include <stdio.h>
+#include <getopt.h>
-#ifdef STDC_HEADERS
-#include <stdlib.h>
-#else
-extern int errno;
+#ifndef MAX_ARGLINE
+# define MAX_ARGLINE 1023
#endif
-
-/* Return nonzero if S is the EOF string. */
-#define EOF_STR(s) (eof_str && *eof_str == *s && !strcmp (eof_str, s))
-
-extern char **environ;
-
-/* Not char because of type promotion; NeXT gcc can't handle it. */
-typedef int boolean;
-#define true 1
-#define false 0
-
-#if __STDC__
-#define VOID void
-#else
-#define VOID char
+#ifndef min
+# define min(a,b) ((a) < (b) ? (a) : (b))
#endif
-VOID *xmalloc P_ ((size_t n));
-VOID *xrealloc P_ ((VOID * p, size_t n));
-
-/* The name this program was run with. */
-char *program_name;
-
-/* Buffer for reading arguments from stdin. */
-static char *linebuf;
-
-/* Line number in stdin since the last command was executed. */
-static int lineno = 0;
-
-/* If nonzero, then instead of putting the args from stdin at
- the end of the command argument list, they are each stuck into the
- initial args, replacing each occurrence of the `replace_pat' in the
- initial args. */
-static char *replace_pat = NULL;
-
-/* The length of `replace_pat'. */
-static size_t rplen = 0;
-
-/* If nonzero, when this string is read on stdin it is treated as
- end of file.
- I don't like this - it should default to NULL. */
-static char *eof_str = "_";
-
-/* If nonzero, the maximum number of nonblank lines from stdin to use
- per command line. */
-static long lines_per_exec = 0;
-
-/* The maximum number of arguments to use per command line. */
-static long args_per_exec = 1024;
-
-/* If true, exit if lines_per_exec or args_per_exec is exceeded. */
-static boolean exit_if_size_exceeded = false;
-
-/* The maximum number of characters that can be used per command line. */
-static long arg_max;
-
-/* Storage for elements of `cmd_argv'. */
-static char *argbuf;
-
-/* The list of args being built. */
-static char **cmd_argv = NULL;
-
-/* Number of elements allocated for `cmd_argv'. */
-static int cmd_argv_alloc = 0;
-
-/* Number of valid elements in `cmd_argv'. */
-static int cmd_argc = 0;
+char outlin[MAX_ARGLINE];
+char inlin[MAX_ARGLINE];
+char startlin[MAX_ARGLINE];
+char *ending = NULL;
+char traceflag = 0;
-/* Number of chars being used in `cmd_argv'. */
-static int cmd_argv_chars = 0;
-
-/* Number of initial arguments given on the command line. */
-static int initial_argc = 0;
-
-/* Number of chars in the initial args. */
-static int initial_argv_chars = 0;
-
-/* true when building up initial arguments in `cmd_argv'. */
-static boolean initial_args = true;
-
-/* If nonzero, the maximum number of child processes that can be running
- at once. */
-static int proc_max = 1;
-
-/* Total number of child processes that have been executed. */
-static int procs_executed = 0;
-
-/* The number of elements in `pids'. */
-static int procs_executing = 0;
-
-/* List of child processes currently executing. */
-static pid_t *pids = NULL;
-
-/* The number of allocated elements in `pids'. */
-static int pids_alloc = 0;
-
-/* Exit status; nonzero if any child process exited with a
- status of 1-125. */
-static int child_error = 0;
-
-/* If true, print each command on stderr before executing it. */
-static boolean print_command = false;
-
-/* If true, query the user before executing each command, and only
- execute the command if the user responds affirmatively. */
-static boolean query_before_executing = false;
-
-static struct option const longopts[] =
-{
- {"null", no_argument, NULL, '0'},
- {"eof", optional_argument, NULL, 'e'},
- {"replace", optional_argument, NULL, 'i'},
- {"max-lines", optional_argument, NULL, 'l'},
- {"max-args", required_argument, NULL, 'n'},
- {"interactive", no_argument, NULL, 'p'},
- {"no-run-if-empty", no_argument, NULL, 'r'},
- {"max-chars", required_argument, NULL, 's'},
- {"verbose", no_argument, NULL, 't'},
- {"exit", no_argument, NULL, 'x'},
- {"max-procs", required_argument, NULL, 'P'},
- {"help", no_argument, NULL, 'h'},
- {NULL, no_argument, NULL, 0}
-};
-
-static int read_line P_ ((void));
-static int read_string P_ ((void));
-static void do_insert P_ ((char *arg, size_t arglen, size_t lblen));
-static void push_arg P_ ((char *arg, size_t len));
-static boolean print_args P_ ((boolean ask));
-static void do_exec P_ ((void));
-static void add_proc P_ ((pid_t pid));
-static void wait_for_proc P_ ((boolean all));
-static long parse_num P_ ((char *str, int option, long min, long max));
-static long env_size P_ ((char **envp));
-
-int xargs_main (argc, argv)
- int argc;
- char **argv;
+int xargs_main(int ac, char **av)
{
- int optc;
- int always_run_command = 1;
- long orig_arg_max;
- char *default_cmd = "/bin/echo";
- int (*read_args) P_ ((void)) = read_line;
-
- program_name = argv[0];
-
- orig_arg_max = ARG_MAX;
- if (orig_arg_max == -1)
- orig_arg_max = LONG_MAX;
- orig_arg_max -= 2048; /* POSIX.2 requires subtracting 2048. */
- arg_max = orig_arg_max;
-
- /* 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 (arg_max > 20 * 1024)
- arg_max = 20 * 1024;
-
- /* Take the size of the environment into account. */
- arg_max -= env_size (environ);
- if (arg_max <= 0)
- fatalError("environment is too large for exec");
-
- while ((optc = getopt_long (argc, argv, "+0e::i::l::n:prs:txP:",
- longopts, (int *) 0)) != -1)
- {
- switch (optc)
- {
- case '0':
- read_args = read_string;
- break;
-
- case 'e':
- if (optarg)
- eof_str = optarg;
- else
- eof_str = 0;
- break;
-
- case 'h':
- usage (xargs_usage);
-
- case 'i':
- if (optarg)
- replace_pat = optarg;
- else
- replace_pat = "{}";
- /* -i excludes -n -l. */
- args_per_exec = 0;
- lines_per_exec = 0;
- break;
-
- case 'l':
- if (optarg)
- lines_per_exec = parse_num (optarg, 'l', 1L, -1L);
- else
- lines_per_exec = 1;
- /* -l excludes -i -n. */
- args_per_exec = 0;
- replace_pat = NULL;
- break;
-
- case 'n':
- args_per_exec = parse_num (optarg, 'n', 1L, -1L);
- /* -n excludes -i -l. */
- lines_per_exec = 0;
- replace_pat = NULL;
- break;
-
- case 's':
- arg_max = parse_num (optarg, 's', 1L, orig_arg_max);
- break;
-
- case 't':
- print_command = true;
- break;
-
- case 'x':
- exit_if_size_exceeded = true;
- break;
-
- case 'p':
- query_before_executing = true;
- print_command = true;
- break;
-
- case 'r':
- always_run_command = 0;
- break;
-
- case 'P':
- proc_max = parse_num (optarg, 'P', 0L, -1L);
- break;
-
- default:
- usage (xargs_usage);
- }
- }
-
- if (replace_pat || lines_per_exec)
- exit_if_size_exceeded = true;
-
- if (optind == argc)
- {
- optind = 0;
- argc = 1;
- argv = &default_cmd;
- }
-
- linebuf = (char *) xmalloc (arg_max + 1);
- argbuf = (char *) xmalloc (arg_max + 1);
-
- /* Make sure to listen for the kids. */
- signal (SIGCHLD, SIG_DFL);
-
- if (!replace_pat)
- {
- for (; optind < argc; optind++)
- push_arg (argv[optind], strlen (argv[optind]) + 1);
- initial_args = false;
- initial_argc = cmd_argc;
- initial_argv_chars = cmd_argv_chars;
-
- while ((*read_args) () != -1)
- if (lines_per_exec && lineno >= lines_per_exec)
- {
- do_exec ();
- lineno = 0;
- }
-
- /* SYSV xargs seems to do at least one exec, even if the
- input is empty. */
- if (cmd_argc != initial_argc
- || (always_run_command && procs_executed == 0))
- do_exec ();
- }
- else
- {
- int i;
- size_t len;
- size_t *arglen = (size_t *) xmalloc (sizeof (size_t) * argc);
-
- for (i = optind; i < argc; i++)
- arglen[i] = strlen(argv[i]);
- rplen = strlen (replace_pat);
- while ((len = (*read_args) ()) != -1)
- {
- /* Don't do insert on the command name. */
- push_arg (argv[optind], arglen[optind] + 1);
- len--;
- for (i = optind + 1; i < argc; i++)
- do_insert (argv[i], arglen[i], len);
- do_exec ();
- }
- }
-
- wait_for_proc (true);
- exit (child_error);
+ int outlen, inlen, startlen, endlen=0, i;
+ char errflg = 0;
+ int maxlin = MAX_ARGLINE;
+
+ while ((i = getopt(ac, av, "tl:e:")) != EOF)
+ switch (i) {
+ case 't': traceflag = 1; break;
+ case 'l': maxlin = min(MAX_ARGLINE, atoi(optarg)); break;
+ case 'e': ending = optarg; break;
+ case '?': errflg++; break;
+ }
+ if (errflg) {
+ fprintf(stderr, USAGE);
+ exit(2);
+ }
+
+ startlin[0] = 0;
+ if (optind == ac) {
+ strcat(startlin, "echo ");
+ }
+ else for ( ; optind < ac; optind++) {
+ strcat(startlin, av[optind]);
+ strcat(startlin, " ");
+ }
+ startlen = strlen(startlin);
+ if (ending) endlen = strlen(ending);
+ maxlin = maxlin - 1 - endlen; /* Pre-compute */
+
+ strcpy(outlin, startlin);
+ outlen = startlen;
+
+ while (gets(inlin) != NULL) {
+ inlen = strlen(inlin);
+ if (maxlin <= (outlen + inlen)) {
+ if (outlen == startlen) {
+ fprintf(stderr, "%s: Line length too short to process '%s'\n",
+ av[0], inlin);
+ exit(3);
+ }
+ if (ending) strcat(outlin, ending);
+ if (traceflag) fputs(outlin,stderr);
+ errno = 0;
+ if (0 != system(outlin)) {
+ if (errno != 0) perror("xargs");
+ exit(1);
+ }
+ strcpy(outlin, startlin);
+ outlen = startlen;
+ }
+ strcat(outlin, inlin);
+ strcat(outlin, " ");
+ outlen = outlen + inlen + 1;
+ }
+ if (outlen != startlen) {
+ if (ending) strcat(outlin, ending);
+ if (traceflag) fputs(outlin,stderr);
+ errno = 0;
+ if (0 != system(outlin)) {
+ if (errno != 0) perror("xargs");
+ exit(1);
+ }
+ }
+ return 0;
}
-
-/* Read a line of arguments from stdin and add them to the list of
- arguments to pass to the command. Ignore blank lines and initial blanks.
- Single and double quotes and backslashes quote metacharacters and blanks
- as they do in the shell.
- Return -1 if eof (either physical or logical) is reached,
- otherwise the length of the last string read (including the null). */
-
-static int
-read_line ()
-{
- static boolean eof = false;
- /* Start out in mode SPACE to always strip leading spaces (even with -i). */
- int state = SPACE; /* The type of character we last read. */
- int prevc; /* The previous value of c. */
- int quotc = 0; /* The last quote character read. */
- int c = EOF;
- boolean first = true; /* true if reading first arg on line. */
- int len;
- char *p = linebuf;
- /* Including the NUL, the args must not grow past this point. */
- char *endbuf = linebuf + arg_max - initial_argv_chars - 1;
-
- if (eof)
- return -1;
- while (1)
- {
- prevc = c;
- c = getc (stdin);
- if (c == EOF)
- {
- /* COMPAT: SYSV seems to ignore stuff on a line that
- ends without a \n; we don't. */
- eof = true;
- if (p == linebuf)
- return -1;
- *p++ = '\0';
- len = p - linebuf;
- /* FIXME we don't check for unterminated quotes here. */
- if (first && EOF_STR (linebuf))
- return -1;
- if (!replace_pat)
- push_arg (linebuf, len);
- return len;
- }
- switch (state)
- {
- case SPACE:
- if (ISSPACE (c))
- continue;
- state = NORM;
- /* aaahhhh.... */
-
- case NORM:
- if (c == '\n')
- {
- if (!ISBLANK (prevc))
- lineno++; /* For -l. */
- if (p == linebuf)
- {
- /* Blank line. */
- state = SPACE;
- continue;
- }
- *p++ = '\0';
- len = p - linebuf;
- if (EOF_STR (linebuf))
- {
- eof = true;
- return first ? -1 : len;
- }
- if (!replace_pat)
- push_arg (linebuf, len);
- return len;
- }
- if (!replace_pat && ISSPACE (c))
- {
- *p++ = '\0';
- len = p - linebuf;
- if (EOF_STR (linebuf))
- {
- eof = true;
- return first ? -1 : len;
- }
- push_arg (linebuf, len);
- p = linebuf;
- state = SPACE;
- first = false;
- continue;
- }
- switch (c)
- {
- case '\\':
- state = BACKSLASH;
- continue;
-
- case '\'':
- case '"':
- state = QUOTE;
- quotc = c;
- continue;
- }
- break;
-
- case QUOTE:
- if (c == '\n')
- fatalError ("unmatched %s quote", quotc == '"' ? "double" : "single");
- if (c == quotc)
- {
- state = NORM;
- continue;
- }
- break;
-
- case BACKSLASH:
- state = NORM;
- break;
- }
- if (p >= endbuf)
- fatalError ("argument line too long");
- *p++ = c;
- }
-}
-
-/* Read a null-terminated string from stdin and add it to the list of
- arguments to pass to the command.
- Return -1 if eof (either physical or logical) is reached,
- otherwise the length of the string read (including the null). */
-
-static int
-read_string ()
-{
- static boolean eof = false;
- int len;
- char *p = linebuf;
- /* Including the NUL, the args must not grow past this point. */
- char *endbuf = linebuf + arg_max - initial_argv_chars - 1;
-
- if (eof)
- return -1;
- while (1)
- {
- int c = getc (stdin);
- if (c == EOF)
- {
- eof = true;
- if (p == linebuf)
- return -1;
- *p++ = '\0';
- len = p - linebuf;
- if (!replace_pat)
- push_arg (linebuf, len);
- return len;
- }
- if (c == '\0')
- {
- lineno++; /* For -l. */
- *p++ = '\0';
- len = p - linebuf;
- if (!replace_pat)
- push_arg (linebuf, len);
- return len;
- }
- if (p >= endbuf)
- fatalError ("argument line too long");
- *p++ = c;
- }
-}
-
-/* Replace all instances of `replace_pat' in ARG with `linebuf',
- and add the resulting string to the list of arguments for the command
- to execute.
- ARGLEN is the length of ARG, not including the null.
- LBLEN is the length of `linebuf', not including the null.
-
- COMPAT: insertions on the SYSV version are limited to 255 chars per line,
- and a max of 5 occurences of replace_pat in the initial-arguments.
- Those restrictions do not exist here. */
-
-static void
-do_insert (arg, arglen, lblen)
- char *arg;
- size_t arglen;
- size_t lblen;
-{
- /* Temporary copy of each arg with the replace pattern replaced by the
- real arg. */
- static char *insertbuf;
- char *p;
- int bytes_left = arg_max - 1; /* Bytes left on the command line. */
-
- if (!insertbuf)
- insertbuf = (char *) xmalloc (arg_max + 1);
- p = insertbuf;
-
- do
- {
- size_t len; /* Length in ARG before `replace_pat'. */
- char *s = strstr (arg, replace_pat);
- if (s)
- len = s - arg;
- else
- len = arglen;
- bytes_left -= len;
- if (bytes_left <= 0)
- break;
-
- strncpy (p, arg, len);
- p += len;
- arg += len;
- arglen -= len;
-
- if (s)
- {
- bytes_left -= lblen;
- if (bytes_left <= 0)
- break;
- strcpy (p, linebuf);
- arg += rplen;
- arglen -= rplen;
- p += lblen;
- }
- }
- while (*arg);
- if (*arg)
- fatalError ("command too long");
- *p++ = '\0';
- push_arg (insertbuf, p - insertbuf);
-}
-
-/* Add ARG to the end of the list of arguments `cmd_argv' to pass
- to the command.
- LEN is the length of ARG, including the terminating null.
- If this brings the list up to its maximum size, execute the command. */
-
-static void
-push_arg (arg, len)
- char *arg;
- size_t len;
-{
- if (arg)
- {
- if (cmd_argv_chars + len > arg_max)
- {
- if (initial_args || cmd_argc == initial_argc)
- fatalError ("can not fit single argument within argument list size limit");
- if (replace_pat
- || (exit_if_size_exceeded &&
- (lines_per_exec || args_per_exec)))
- fatalError ("argument list too long");
- do_exec ();
- }
- if (!initial_args && args_per_exec &&
- cmd_argc - initial_argc == args_per_exec)
- do_exec ();
- }
-
- if (cmd_argc >= cmd_argv_alloc)
- {
- if (!cmd_argv)
- {
- cmd_argv_alloc = 64;
- cmd_argv = (char **) xmalloc (sizeof (char *) * cmd_argv_alloc);
- }
- else
- {
- cmd_argv_alloc *= 2;
- cmd_argv = (char **) xrealloc (cmd_argv,
- sizeof (char *) * cmd_argv_alloc);
- }
- }
-
- if (!arg)
- cmd_argv[cmd_argc++] = NULL;
- else
- {
- cmd_argv[cmd_argc++] = argbuf + cmd_argv_chars;
- strcpy (argbuf + cmd_argv_chars, arg);
- cmd_argv_chars += len;
- }
-}
-
-/* Print the arguments of the command to execute.
- If ASK is nonzero, prompt the user for a response, and
- if the user responds affirmatively, return true;
- otherwise, return false. */
-
-static boolean
-print_args (ask)
- boolean ask;
-{
- int i;
-
- for (i = 0; i < cmd_argc - 1; i++)
- fprintf (stderr, "%s ", cmd_argv[i]);
- if (ask)
- {
- static FILE *tty_stream;
- int c, savec;
-
- if (!tty_stream)
- {
- tty_stream = fopen ("/dev/tty", "r");
- if (!tty_stream)
- fatalError (" Could not open /dev/tty");
- }
- fputs ("?...", stderr);
- fflush (stderr);
- c = savec = getc (tty_stream);
- while (c != EOF && c != '\n')
- c = getc (tty_stream);
- if (savec == 'y' || savec == 'Y')
- return true;
- }
- else
- putc ('\n', stderr);
-
- return false;
-}
-
-/* Execute the command that has been built in `cmd_argv'. This may involve
- waiting for processes that were previously executed. */
-
-static void
-do_exec ()
-{
- pid_t child;
-
- push_arg ((char *) NULL, 0); /* Null terminate the arg list. */
- if (!query_before_executing || print_args (true))
- {
- if (proc_max && procs_executing >= proc_max)
- wait_for_proc (false);
- if (!query_before_executing && print_command)
- print_args (false);
- /* If we run out of processes, wait for a child to return and
- try again. */
- while ((child = fork ()) < 0 && errno == EAGAIN && procs_executing)
- wait_for_proc (false);
- switch (child)
- {
- case -1:
- fatalError ("cannot fork");
-
- case 0: /* Child. */
- execvp (cmd_argv[0], cmd_argv);
- errorMsg ("failed to exec '%s'", cmd_argv[0]);
- _exit (errno == ENOENT ? 127 : 126);
- }
- add_proc (child);
- }
-
- cmd_argc = initial_argc;
- cmd_argv_chars = initial_argv_chars;
-}
-
-/* Add the process with id PID to the list of processes that have
- been executed. */
-
-static void
-add_proc (pid)
- pid_t pid;
-{
- int i;
-
- /* Find an empty slot. */
- for (i = 0; i < pids_alloc && pids[i]; i++)
- ;
- if (i == pids_alloc)
- {
- if (pids_alloc == 0)
- {
- pids_alloc = proc_max ? proc_max : 64;
- pids = (pid_t *) xmalloc (sizeof (pid_t) * pids_alloc);
- }
- else
- {
- pids_alloc *= 2;
- pids = (pid_t *) xrealloc (pids,
- sizeof (pid_t) * pids_alloc);
- }
- memset (&pids[i], '\0', sizeof (pid_t) * (pids_alloc - i));
- }
- pids[i] = pid;
- procs_executing++;
- procs_executed++;
-}
-
-/* If ALL is true, wait for all child processes to finish;
- otherwise, wait for one child process to finish.
- Remove the processes that finish from the list of executing processes. */
-
-static void
-wait_for_proc (all)
- boolean all;
-{
- while (procs_executing)
- {
- int i, status;
-
- do
- {
- pid_t pid;
-
- pid = wait (&status);
- if (pid < 0)
- fatalError ("error waiting for child process");
-
- /* Find the entry in `pids' for the child process
- that exited. */
- for (i = 0; i < pids_alloc && pid != pids[i]; i++)
- ;
- }
- while (i == pids_alloc); /* A child died that we didn't start? */
-
- /* Remove the child from the list. */
- pids[i] = 0;
- procs_executing--;
-
- if (WEXITSTATUS (status) == 126 || WEXITSTATUS (status) == 127)
- exit (WEXITSTATUS (status)); /* Can't find or run the command. */
- if (WEXITSTATUS (status) == 255)
- fatalError ( "%s: exited with status 255; aborting", cmd_argv[0]);
- if (WIFSTOPPED (status))
- fatalError ( "%s: stopped by signal %d", cmd_argv[0], WSTOPSIG (status));
- if (WIFSIGNALED (status))
- fatalError ("%s: terminated by signal %d", cmd_argv[0], WTERMSIG (status));
- if (WEXITSTATUS (status) != 0)
- child_error = 123;
-
- if (!all)
- break;
- }
-}
-
-/* Return the value of the number represented in STR.
- OPTION is the command line option to which STR is the argument.
- If the value does not fall within the boundaries MIN and MAX,
- Print an error message mentioning OPTION and exit. */
-
-static long
-parse_num (str, option, min, max)
- char *str;
- int option;
- long min;
- long max;
-{
- char *eptr;
- long val;
-
- val = strtol (str, &eptr, 10);
- if (eptr == str || *eptr)
- {
- fprintf (stderr, "%s: invalid number for -%c option\n",
- program_name, option);
- usage (xargs_usage);
- }
- else if (val < min)
- {
- fprintf (stderr, "%s: value for -%c option must be >= %ld\n",
- program_name, option, min);
- usage (xargs_usage);
- }
- else if (max >= 0 && val > max)
- {
- fprintf (stderr, "%s: value for -%c option must be < %ld\n",
- program_name, option, max);
- usage (xargs_usage);
- }
- return val;
-}
-
-/* Return how much of ARG_MAX is used by the environment. */
-
-static long
-env_size (envp)
- char **envp;
-{
- long len = 0;
-
- while (*envp)
- len += strlen (*envp++) + 1;
-
- return len;
-}
-
#ifdef BB_FEATURE_LS_FILETYPES
"p"
#endif
+#ifdef BB_FEATURE_LS_FOLLOWLINKS
+ "L"
+#endif
#ifdef BB_FEATURE_LS_RECURSIVE
"R"
#endif
#ifdef BB_FEATURE_LS_FILETYPES
"\t-p\tappend indicator (one of /=@|) to entries\n"
#endif
+#ifdef BB_FEATURE_LS_FOLLOWLINKS
+ "\t-L\tlist entries pointed to by symbolic links\n"
+#endif
#ifdef BB_FEATURE_LS_RECURSIVE
"\t-R\tlist subdirectories recursively\n"
#endif
#endif
#if defined BB_XARGS
-const char xargs_usage[] =
- "xargs [-0prtx] [-e[eof-str]] [-i[replace-str]] [-l[max-lines]]\n"
- "[-n max-args] [-s max-chars] [-P max-procs] [--null] [--eof[=eof-str]]\n"
- "[--replace[=replace-str]] [--max-lines[=max-lines]] [--interactive]\n"
- "[--max-chars=max-chars] [--verbose] [--exit] [--max-procs=max-procs]\n"
- "[--max-args=max-args] [--no-run-if-empty] [--help]\n"
- "[command [initial-arguments]]\n"
- "\nBuild and execute command on lines from standard input.\n";
+const char xargs_usage[] = "xargs [OPTIONS] [COMMAND] [ARGS...]\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+ "\nExecutes COMMAND on every item given by standard input.\n\n"
+ "Options:\n"
+ "\t-t\tPrint the command just before it is run\n"
+ "\t-l LEN\tUse LEN as maximum line length (default 490, max 1023)\n"
+ "\t-e ENDING\tAppend ENDING to the command before executing it.\n"
+#endif
+ ;
#endif
#if defined BB_YES
-/* xargs for busybox -- using GNU xargs till we can get something
- * better. minix xargs is a bit smaller... */
+/* minix xargs - Make and execute commands
+ * Author: Ian Nicholls: 1 Mar 90 */
+
+/*
+ * xargs - Accept words from stdin until, combined with the arguments
+ * given on the command line, just fit into the command line limit.
+ * Then, execute the result.
+ * e.g. ls | xargs compress
+ * find . -name '*.s' -print | xargs ar qv libc.a
+ *
+ * flags: -t Print the command just before it is run
+ * -l len Use len as maximum line length (default 490, max 1023)
+ * -e ending Append ending to the command before executing it.
+ *
+ * Exits with: 0 No errors.
+ * 1 If any system(3) call returns a nonzero status.
+ * 2 Usage error
+ * 3 Line length too short to contain some single argument.
+ *
+ * Examples: xargs ar qv libc.a < liborder # Create a new libc.a
+ * find . -name '*.s' -print | xargs rm # Remove all .s files
+ * find . -type f ! -name '*.Z' \ # Compress old files.
+ * -atime +60 -print | xargs compress -v
+ *
+ * Bugs: If the command contains unquoted wildflags, then the system(3) call
+ * call may expand this to larger than the maximum line size.
+ * The command is not executed if nothing was read from stdin.
+ * xargs may give up too easily when the command returns nonzero.
+ */
+#define USAGE "usage: xargs [-t] [-l len] [-e endargs] command [args...]\n"
-/* xargs -- build and execute command lines from standard input
- Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
-
- 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, or (at your option)
- any later version.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* Written by Mike Rendell <michael@cs.mun.ca>
- and David MacKenzie <djm@gnu.ai.mit.edu>. */
-
-#include "internal.h"
-
-#define HAVE_STRING_H 1
-#define HAVE_SYS_WAIT_H 1
-#define HAVE_UNISTD_H 1
-#define HAVE_LIMITS_H 1
-#define STDC_HEADERS 1
-
-#include <sys/types.h> /* For pid_t. */
-#if HAVE_SYS_WAIT_H
-#include <sys/wait.h>
-#endif
-
-#ifndef WIFSTOPPED
-#define WIFSTOPPED(w) (((w) & 0xff) == 0x7f)
-#endif
-#ifndef WIFSIGNALED
-#define WIFSIGNALED(w) (((w) & 0xff) != 0x7f && ((w) & 0xff) != 0)
-#endif
-#ifndef WIFEXITED
-#define WIFEXITED(w) (((w) & 0xff) == 0)
-#endif
-
-#ifndef WSTOPSIG
-#define WSTOPSIG(w) (((w) >> 8) & 0xff)
-#endif
-#ifndef WTERMSIG
-#define WTERMSIG(w) ((w) & 0x7f)
-#endif
-#ifndef WEXITSTATUS
-#define WEXITSTATUS(w) (((w) >> 8) & 0xff)
-#endif
-
-#if __STDC__
-#define P_(s) s
-#else
-#define P_(s) ()
-#endif
-
-#include <ctype.h>
-
-#if !defined (isascii) || defined (STDC_HEADERS)
-#ifdef isascii
-#undef isascii
-#endif
-#define isascii(c) 1
-#endif
-
-#ifdef isblank
-#define ISBLANK(c) (isascii (c) && isblank (c))
-#else
-#define ISBLANK(c) ((c) == ' ' || (c) == '\t')
-#endif
-
-#define ISSPACE(c) (ISBLANK (c) || (c) == '\n' || (c) == '\r' \
- || (c) == '\f' || (c) == '\v')
-
-#include <stdio.h>
#include <errno.h>
-#include <getopt.h>
-
-#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
+#include <stdlib.h>
#include <string.h>
-#if !defined(STDC_HEADERS)
-#include <memory.h>
-#endif
-#else
-#include <strings.h>
-#define memcpy(dest, source, count) (bcopy((source), (dest), (count)))
-#endif
-
-#ifndef _POSIX_SOURCE
-#include <sys/param.h>
-#endif
-
-#ifdef HAVE_LIMITS_H
-#include <limits.h>
-#endif
-
-#ifndef LONG_MAX
-#define LONG_MAX (~(1 << (sizeof (long) * 8 - 1)))
-#endif
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#include <signal.h>
-
-#if !defined(SIGCHLD) && defined(SIGCLD)
-#define SIGCHLD SIGCLD
-#endif
-
-/* 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 NCARGS
-#endif
-
-/* States for read_line. */
-#define NORM 0
-#define SPACE 1
-#define QUOTE 2
-#define BACKSLASH 3
+#include <stdio.h>
+#include <getopt.h>
-#ifdef STDC_HEADERS
-#include <stdlib.h>
-#else
-extern int errno;
+#ifndef MAX_ARGLINE
+# define MAX_ARGLINE 1023
#endif
-
-/* Return nonzero if S is the EOF string. */
-#define EOF_STR(s) (eof_str && *eof_str == *s && !strcmp (eof_str, s))
-
-extern char **environ;
-
-/* Not char because of type promotion; NeXT gcc can't handle it. */
-typedef int boolean;
-#define true 1
-#define false 0
-
-#if __STDC__
-#define VOID void
-#else
-#define VOID char
+#ifndef min
+# define min(a,b) ((a) < (b) ? (a) : (b))
#endif
-VOID *xmalloc P_ ((size_t n));
-VOID *xrealloc P_ ((VOID * p, size_t n));
-
-/* The name this program was run with. */
-char *program_name;
-
-/* Buffer for reading arguments from stdin. */
-static char *linebuf;
-
-/* Line number in stdin since the last command was executed. */
-static int lineno = 0;
-
-/* If nonzero, then instead of putting the args from stdin at
- the end of the command argument list, they are each stuck into the
- initial args, replacing each occurrence of the `replace_pat' in the
- initial args. */
-static char *replace_pat = NULL;
-
-/* The length of `replace_pat'. */
-static size_t rplen = 0;
-
-/* If nonzero, when this string is read on stdin it is treated as
- end of file.
- I don't like this - it should default to NULL. */
-static char *eof_str = "_";
-
-/* If nonzero, the maximum number of nonblank lines from stdin to use
- per command line. */
-static long lines_per_exec = 0;
-
-/* The maximum number of arguments to use per command line. */
-static long args_per_exec = 1024;
-
-/* If true, exit if lines_per_exec or args_per_exec is exceeded. */
-static boolean exit_if_size_exceeded = false;
-
-/* The maximum number of characters that can be used per command line. */
-static long arg_max;
-
-/* Storage for elements of `cmd_argv'. */
-static char *argbuf;
-
-/* The list of args being built. */
-static char **cmd_argv = NULL;
-
-/* Number of elements allocated for `cmd_argv'. */
-static int cmd_argv_alloc = 0;
-
-/* Number of valid elements in `cmd_argv'. */
-static int cmd_argc = 0;
+char outlin[MAX_ARGLINE];
+char inlin[MAX_ARGLINE];
+char startlin[MAX_ARGLINE];
+char *ending = NULL;
+char traceflag = 0;
-/* Number of chars being used in `cmd_argv'. */
-static int cmd_argv_chars = 0;
-
-/* Number of initial arguments given on the command line. */
-static int initial_argc = 0;
-
-/* Number of chars in the initial args. */
-static int initial_argv_chars = 0;
-
-/* true when building up initial arguments in `cmd_argv'. */
-static boolean initial_args = true;
-
-/* If nonzero, the maximum number of child processes that can be running
- at once. */
-static int proc_max = 1;
-
-/* Total number of child processes that have been executed. */
-static int procs_executed = 0;
-
-/* The number of elements in `pids'. */
-static int procs_executing = 0;
-
-/* List of child processes currently executing. */
-static pid_t *pids = NULL;
-
-/* The number of allocated elements in `pids'. */
-static int pids_alloc = 0;
-
-/* Exit status; nonzero if any child process exited with a
- status of 1-125. */
-static int child_error = 0;
-
-/* If true, print each command on stderr before executing it. */
-static boolean print_command = false;
-
-/* If true, query the user before executing each command, and only
- execute the command if the user responds affirmatively. */
-static boolean query_before_executing = false;
-
-static struct option const longopts[] =
-{
- {"null", no_argument, NULL, '0'},
- {"eof", optional_argument, NULL, 'e'},
- {"replace", optional_argument, NULL, 'i'},
- {"max-lines", optional_argument, NULL, 'l'},
- {"max-args", required_argument, NULL, 'n'},
- {"interactive", no_argument, NULL, 'p'},
- {"no-run-if-empty", no_argument, NULL, 'r'},
- {"max-chars", required_argument, NULL, 's'},
- {"verbose", no_argument, NULL, 't'},
- {"exit", no_argument, NULL, 'x'},
- {"max-procs", required_argument, NULL, 'P'},
- {"help", no_argument, NULL, 'h'},
- {NULL, no_argument, NULL, 0}
-};
-
-static int read_line P_ ((void));
-static int read_string P_ ((void));
-static void do_insert P_ ((char *arg, size_t arglen, size_t lblen));
-static void push_arg P_ ((char *arg, size_t len));
-static boolean print_args P_ ((boolean ask));
-static void do_exec P_ ((void));
-static void add_proc P_ ((pid_t pid));
-static void wait_for_proc P_ ((boolean all));
-static long parse_num P_ ((char *str, int option, long min, long max));
-static long env_size P_ ((char **envp));
-
-int xargs_main (argc, argv)
- int argc;
- char **argv;
+int xargs_main(int ac, char **av)
{
- int optc;
- int always_run_command = 1;
- long orig_arg_max;
- char *default_cmd = "/bin/echo";
- int (*read_args) P_ ((void)) = read_line;
-
- program_name = argv[0];
-
- orig_arg_max = ARG_MAX;
- if (orig_arg_max == -1)
- orig_arg_max = LONG_MAX;
- orig_arg_max -= 2048; /* POSIX.2 requires subtracting 2048. */
- arg_max = orig_arg_max;
-
- /* 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 (arg_max > 20 * 1024)
- arg_max = 20 * 1024;
-
- /* Take the size of the environment into account. */
- arg_max -= env_size (environ);
- if (arg_max <= 0)
- fatalError("environment is too large for exec");
-
- while ((optc = getopt_long (argc, argv, "+0e::i::l::n:prs:txP:",
- longopts, (int *) 0)) != -1)
- {
- switch (optc)
- {
- case '0':
- read_args = read_string;
- break;
-
- case 'e':
- if (optarg)
- eof_str = optarg;
- else
- eof_str = 0;
- break;
-
- case 'h':
- usage (xargs_usage);
-
- case 'i':
- if (optarg)
- replace_pat = optarg;
- else
- replace_pat = "{}";
- /* -i excludes -n -l. */
- args_per_exec = 0;
- lines_per_exec = 0;
- break;
-
- case 'l':
- if (optarg)
- lines_per_exec = parse_num (optarg, 'l', 1L, -1L);
- else
- lines_per_exec = 1;
- /* -l excludes -i -n. */
- args_per_exec = 0;
- replace_pat = NULL;
- break;
-
- case 'n':
- args_per_exec = parse_num (optarg, 'n', 1L, -1L);
- /* -n excludes -i -l. */
- lines_per_exec = 0;
- replace_pat = NULL;
- break;
-
- case 's':
- arg_max = parse_num (optarg, 's', 1L, orig_arg_max);
- break;
-
- case 't':
- print_command = true;
- break;
-
- case 'x':
- exit_if_size_exceeded = true;
- break;
-
- case 'p':
- query_before_executing = true;
- print_command = true;
- break;
-
- case 'r':
- always_run_command = 0;
- break;
-
- case 'P':
- proc_max = parse_num (optarg, 'P', 0L, -1L);
- break;
-
- default:
- usage (xargs_usage);
- }
- }
-
- if (replace_pat || lines_per_exec)
- exit_if_size_exceeded = true;
-
- if (optind == argc)
- {
- optind = 0;
- argc = 1;
- argv = &default_cmd;
- }
-
- linebuf = (char *) xmalloc (arg_max + 1);
- argbuf = (char *) xmalloc (arg_max + 1);
-
- /* Make sure to listen for the kids. */
- signal (SIGCHLD, SIG_DFL);
-
- if (!replace_pat)
- {
- for (; optind < argc; optind++)
- push_arg (argv[optind], strlen (argv[optind]) + 1);
- initial_args = false;
- initial_argc = cmd_argc;
- initial_argv_chars = cmd_argv_chars;
-
- while ((*read_args) () != -1)
- if (lines_per_exec && lineno >= lines_per_exec)
- {
- do_exec ();
- lineno = 0;
- }
-
- /* SYSV xargs seems to do at least one exec, even if the
- input is empty. */
- if (cmd_argc != initial_argc
- || (always_run_command && procs_executed == 0))
- do_exec ();
- }
- else
- {
- int i;
- size_t len;
- size_t *arglen = (size_t *) xmalloc (sizeof (size_t) * argc);
-
- for (i = optind; i < argc; i++)
- arglen[i] = strlen(argv[i]);
- rplen = strlen (replace_pat);
- while ((len = (*read_args) ()) != -1)
- {
- /* Don't do insert on the command name. */
- push_arg (argv[optind], arglen[optind] + 1);
- len--;
- for (i = optind + 1; i < argc; i++)
- do_insert (argv[i], arglen[i], len);
- do_exec ();
- }
- }
-
- wait_for_proc (true);
- exit (child_error);
+ int outlen, inlen, startlen, endlen=0, i;
+ char errflg = 0;
+ int maxlin = MAX_ARGLINE;
+
+ while ((i = getopt(ac, av, "tl:e:")) != EOF)
+ switch (i) {
+ case 't': traceflag = 1; break;
+ case 'l': maxlin = min(MAX_ARGLINE, atoi(optarg)); break;
+ case 'e': ending = optarg; break;
+ case '?': errflg++; break;
+ }
+ if (errflg) {
+ fprintf(stderr, USAGE);
+ exit(2);
+ }
+
+ startlin[0] = 0;
+ if (optind == ac) {
+ strcat(startlin, "echo ");
+ }
+ else for ( ; optind < ac; optind++) {
+ strcat(startlin, av[optind]);
+ strcat(startlin, " ");
+ }
+ startlen = strlen(startlin);
+ if (ending) endlen = strlen(ending);
+ maxlin = maxlin - 1 - endlen; /* Pre-compute */
+
+ strcpy(outlin, startlin);
+ outlen = startlen;
+
+ while (gets(inlin) != NULL) {
+ inlen = strlen(inlin);
+ if (maxlin <= (outlen + inlen)) {
+ if (outlen == startlen) {
+ fprintf(stderr, "%s: Line length too short to process '%s'\n",
+ av[0], inlin);
+ exit(3);
+ }
+ if (ending) strcat(outlin, ending);
+ if (traceflag) fputs(outlin,stderr);
+ errno = 0;
+ if (0 != system(outlin)) {
+ if (errno != 0) perror("xargs");
+ exit(1);
+ }
+ strcpy(outlin, startlin);
+ outlen = startlen;
+ }
+ strcat(outlin, inlin);
+ strcat(outlin, " ");
+ outlen = outlen + inlen + 1;
+ }
+ if (outlen != startlen) {
+ if (ending) strcat(outlin, ending);
+ if (traceflag) fputs(outlin,stderr);
+ errno = 0;
+ if (0 != system(outlin)) {
+ if (errno != 0) perror("xargs");
+ exit(1);
+ }
+ }
+ return 0;
}
-
-/* Read a line of arguments from stdin and add them to the list of
- arguments to pass to the command. Ignore blank lines and initial blanks.
- Single and double quotes and backslashes quote metacharacters and blanks
- as they do in the shell.
- Return -1 if eof (either physical or logical) is reached,
- otherwise the length of the last string read (including the null). */
-
-static int
-read_line ()
-{
- static boolean eof = false;
- /* Start out in mode SPACE to always strip leading spaces (even with -i). */
- int state = SPACE; /* The type of character we last read. */
- int prevc; /* The previous value of c. */
- int quotc = 0; /* The last quote character read. */
- int c = EOF;
- boolean first = true; /* true if reading first arg on line. */
- int len;
- char *p = linebuf;
- /* Including the NUL, the args must not grow past this point. */
- char *endbuf = linebuf + arg_max - initial_argv_chars - 1;
-
- if (eof)
- return -1;
- while (1)
- {
- prevc = c;
- c = getc (stdin);
- if (c == EOF)
- {
- /* COMPAT: SYSV seems to ignore stuff on a line that
- ends without a \n; we don't. */
- eof = true;
- if (p == linebuf)
- return -1;
- *p++ = '\0';
- len = p - linebuf;
- /* FIXME we don't check for unterminated quotes here. */
- if (first && EOF_STR (linebuf))
- return -1;
- if (!replace_pat)
- push_arg (linebuf, len);
- return len;
- }
- switch (state)
- {
- case SPACE:
- if (ISSPACE (c))
- continue;
- state = NORM;
- /* aaahhhh.... */
-
- case NORM:
- if (c == '\n')
- {
- if (!ISBLANK (prevc))
- lineno++; /* For -l. */
- if (p == linebuf)
- {
- /* Blank line. */
- state = SPACE;
- continue;
- }
- *p++ = '\0';
- len = p - linebuf;
- if (EOF_STR (linebuf))
- {
- eof = true;
- return first ? -1 : len;
- }
- if (!replace_pat)
- push_arg (linebuf, len);
- return len;
- }
- if (!replace_pat && ISSPACE (c))
- {
- *p++ = '\0';
- len = p - linebuf;
- if (EOF_STR (linebuf))
- {
- eof = true;
- return first ? -1 : len;
- }
- push_arg (linebuf, len);
- p = linebuf;
- state = SPACE;
- first = false;
- continue;
- }
- switch (c)
- {
- case '\\':
- state = BACKSLASH;
- continue;
-
- case '\'':
- case '"':
- state = QUOTE;
- quotc = c;
- continue;
- }
- break;
-
- case QUOTE:
- if (c == '\n')
- fatalError ("unmatched %s quote", quotc == '"' ? "double" : "single");
- if (c == quotc)
- {
- state = NORM;
- continue;
- }
- break;
-
- case BACKSLASH:
- state = NORM;
- break;
- }
- if (p >= endbuf)
- fatalError ("argument line too long");
- *p++ = c;
- }
-}
-
-/* Read a null-terminated string from stdin and add it to the list of
- arguments to pass to the command.
- Return -1 if eof (either physical or logical) is reached,
- otherwise the length of the string read (including the null). */
-
-static int
-read_string ()
-{
- static boolean eof = false;
- int len;
- char *p = linebuf;
- /* Including the NUL, the args must not grow past this point. */
- char *endbuf = linebuf + arg_max - initial_argv_chars - 1;
-
- if (eof)
- return -1;
- while (1)
- {
- int c = getc (stdin);
- if (c == EOF)
- {
- eof = true;
- if (p == linebuf)
- return -1;
- *p++ = '\0';
- len = p - linebuf;
- if (!replace_pat)
- push_arg (linebuf, len);
- return len;
- }
- if (c == '\0')
- {
- lineno++; /* For -l. */
- *p++ = '\0';
- len = p - linebuf;
- if (!replace_pat)
- push_arg (linebuf, len);
- return len;
- }
- if (p >= endbuf)
- fatalError ("argument line too long");
- *p++ = c;
- }
-}
-
-/* Replace all instances of `replace_pat' in ARG with `linebuf',
- and add the resulting string to the list of arguments for the command
- to execute.
- ARGLEN is the length of ARG, not including the null.
- LBLEN is the length of `linebuf', not including the null.
-
- COMPAT: insertions on the SYSV version are limited to 255 chars per line,
- and a max of 5 occurences of replace_pat in the initial-arguments.
- Those restrictions do not exist here. */
-
-static void
-do_insert (arg, arglen, lblen)
- char *arg;
- size_t arglen;
- size_t lblen;
-{
- /* Temporary copy of each arg with the replace pattern replaced by the
- real arg. */
- static char *insertbuf;
- char *p;
- int bytes_left = arg_max - 1; /* Bytes left on the command line. */
-
- if (!insertbuf)
- insertbuf = (char *) xmalloc (arg_max + 1);
- p = insertbuf;
-
- do
- {
- size_t len; /* Length in ARG before `replace_pat'. */
- char *s = strstr (arg, replace_pat);
- if (s)
- len = s - arg;
- else
- len = arglen;
- bytes_left -= len;
- if (bytes_left <= 0)
- break;
-
- strncpy (p, arg, len);
- p += len;
- arg += len;
- arglen -= len;
-
- if (s)
- {
- bytes_left -= lblen;
- if (bytes_left <= 0)
- break;
- strcpy (p, linebuf);
- arg += rplen;
- arglen -= rplen;
- p += lblen;
- }
- }
- while (*arg);
- if (*arg)
- fatalError ("command too long");
- *p++ = '\0';
- push_arg (insertbuf, p - insertbuf);
-}
-
-/* Add ARG to the end of the list of arguments `cmd_argv' to pass
- to the command.
- LEN is the length of ARG, including the terminating null.
- If this brings the list up to its maximum size, execute the command. */
-
-static void
-push_arg (arg, len)
- char *arg;
- size_t len;
-{
- if (arg)
- {
- if (cmd_argv_chars + len > arg_max)
- {
- if (initial_args || cmd_argc == initial_argc)
- fatalError ("can not fit single argument within argument list size limit");
- if (replace_pat
- || (exit_if_size_exceeded &&
- (lines_per_exec || args_per_exec)))
- fatalError ("argument list too long");
- do_exec ();
- }
- if (!initial_args && args_per_exec &&
- cmd_argc - initial_argc == args_per_exec)
- do_exec ();
- }
-
- if (cmd_argc >= cmd_argv_alloc)
- {
- if (!cmd_argv)
- {
- cmd_argv_alloc = 64;
- cmd_argv = (char **) xmalloc (sizeof (char *) * cmd_argv_alloc);
- }
- else
- {
- cmd_argv_alloc *= 2;
- cmd_argv = (char **) xrealloc (cmd_argv,
- sizeof (char *) * cmd_argv_alloc);
- }
- }
-
- if (!arg)
- cmd_argv[cmd_argc++] = NULL;
- else
- {
- cmd_argv[cmd_argc++] = argbuf + cmd_argv_chars;
- strcpy (argbuf + cmd_argv_chars, arg);
- cmd_argv_chars += len;
- }
-}
-
-/* Print the arguments of the command to execute.
- If ASK is nonzero, prompt the user for a response, and
- if the user responds affirmatively, return true;
- otherwise, return false. */
-
-static boolean
-print_args (ask)
- boolean ask;
-{
- int i;
-
- for (i = 0; i < cmd_argc - 1; i++)
- fprintf (stderr, "%s ", cmd_argv[i]);
- if (ask)
- {
- static FILE *tty_stream;
- int c, savec;
-
- if (!tty_stream)
- {
- tty_stream = fopen ("/dev/tty", "r");
- if (!tty_stream)
- fatalError (" Could not open /dev/tty");
- }
- fputs ("?...", stderr);
- fflush (stderr);
- c = savec = getc (tty_stream);
- while (c != EOF && c != '\n')
- c = getc (tty_stream);
- if (savec == 'y' || savec == 'Y')
- return true;
- }
- else
- putc ('\n', stderr);
-
- return false;
-}
-
-/* Execute the command that has been built in `cmd_argv'. This may involve
- waiting for processes that were previously executed. */
-
-static void
-do_exec ()
-{
- pid_t child;
-
- push_arg ((char *) NULL, 0); /* Null terminate the arg list. */
- if (!query_before_executing || print_args (true))
- {
- if (proc_max && procs_executing >= proc_max)
- wait_for_proc (false);
- if (!query_before_executing && print_command)
- print_args (false);
- /* If we run out of processes, wait for a child to return and
- try again. */
- while ((child = fork ()) < 0 && errno == EAGAIN && procs_executing)
- wait_for_proc (false);
- switch (child)
- {
- case -1:
- fatalError ("cannot fork");
-
- case 0: /* Child. */
- execvp (cmd_argv[0], cmd_argv);
- errorMsg ("failed to exec '%s'", cmd_argv[0]);
- _exit (errno == ENOENT ? 127 : 126);
- }
- add_proc (child);
- }
-
- cmd_argc = initial_argc;
- cmd_argv_chars = initial_argv_chars;
-}
-
-/* Add the process with id PID to the list of processes that have
- been executed. */
-
-static void
-add_proc (pid)
- pid_t pid;
-{
- int i;
-
- /* Find an empty slot. */
- for (i = 0; i < pids_alloc && pids[i]; i++)
- ;
- if (i == pids_alloc)
- {
- if (pids_alloc == 0)
- {
- pids_alloc = proc_max ? proc_max : 64;
- pids = (pid_t *) xmalloc (sizeof (pid_t) * pids_alloc);
- }
- else
- {
- pids_alloc *= 2;
- pids = (pid_t *) xrealloc (pids,
- sizeof (pid_t) * pids_alloc);
- }
- memset (&pids[i], '\0', sizeof (pid_t) * (pids_alloc - i));
- }
- pids[i] = pid;
- procs_executing++;
- procs_executed++;
-}
-
-/* If ALL is true, wait for all child processes to finish;
- otherwise, wait for one child process to finish.
- Remove the processes that finish from the list of executing processes. */
-
-static void
-wait_for_proc (all)
- boolean all;
-{
- while (procs_executing)
- {
- int i, status;
-
- do
- {
- pid_t pid;
-
- pid = wait (&status);
- if (pid < 0)
- fatalError ("error waiting for child process");
-
- /* Find the entry in `pids' for the child process
- that exited. */
- for (i = 0; i < pids_alloc && pid != pids[i]; i++)
- ;
- }
- while (i == pids_alloc); /* A child died that we didn't start? */
-
- /* Remove the child from the list. */
- pids[i] = 0;
- procs_executing--;
-
- if (WEXITSTATUS (status) == 126 || WEXITSTATUS (status) == 127)
- exit (WEXITSTATUS (status)); /* Can't find or run the command. */
- if (WEXITSTATUS (status) == 255)
- fatalError ( "%s: exited with status 255; aborting", cmd_argv[0]);
- if (WIFSTOPPED (status))
- fatalError ( "%s: stopped by signal %d", cmd_argv[0], WSTOPSIG (status));
- if (WIFSIGNALED (status))
- fatalError ("%s: terminated by signal %d", cmd_argv[0], WTERMSIG (status));
- if (WEXITSTATUS (status) != 0)
- child_error = 123;
-
- if (!all)
- break;
- }
-}
-
-/* Return the value of the number represented in STR.
- OPTION is the command line option to which STR is the argument.
- If the value does not fall within the boundaries MIN and MAX,
- Print an error message mentioning OPTION and exit. */
-
-static long
-parse_num (str, option, min, max)
- char *str;
- int option;
- long min;
- long max;
-{
- char *eptr;
- long val;
-
- val = strtol (str, &eptr, 10);
- if (eptr == str || *eptr)
- {
- fprintf (stderr, "%s: invalid number for -%c option\n",
- program_name, option);
- usage (xargs_usage);
- }
- else if (val < min)
- {
- fprintf (stderr, "%s: value for -%c option must be >= %ld\n",
- program_name, option, min);
- usage (xargs_usage);
- }
- else if (max >= 0 && val > max)
- {
- fprintf (stderr, "%s: value for -%c option must be < %ld\n",
- program_name, option, max);
- usage (xargs_usage);
- }
- return val;
-}
-
-/* Return how much of ARG_MAX is used by the environment. */
-
-static long
-env_size (envp)
- char **envp;
-{
- long len = 0;
-
- while (*envp)
- len += strlen (*envp++) + 1;
-
- return len;
-}
-
projects / oweals / busybox.git / commitdiff