rewrite, so it should be firly clean now
This commit is contained in:
Eric Andersen
parent
5b17693f0a
commit
a37d5b772b
@ -1,116 +1,115 @@
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/* minix xargs - Make and execute commands
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* Author: Ian Nicholls: 1 Mar 90 */
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/* vi: set sw=4 ts=4: */
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/*
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* xargs - Accept words from stdin until, combined with the arguments
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* given on the command line, just fit into the command line limit.
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* Then, execute the result.
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* e.g. ls | xargs compress
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* find . -name '*.s' -print | xargs ar qv libc.a
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* Mini xargs implementation for busybox
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*
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* flags: -t Print the command just before it is run
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* -l len Use len as maximum line length (default 490, max 1023)
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* -e ending Append ending to the command before executing it.
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* Copyright (C) 2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* Exits with: 0 No errors.
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* 1 If any system(3) call returns a nonzero status.
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* 2 Usage error
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* 3 Line length too short to contain some single argument.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Examples: xargs ar qv libc.a < liborder # Create a new libc.a
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* find . -name '*.s' -print | xargs rm # Remove all .s files
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* find . -type f ! -name '*.Z' \ # Compress old files.
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* -atime +60 -print | xargs compress -v
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Bugs: If the command contains unquoted wildflags, then the system(3) call
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* call may expand this to larger than the maximum line size.
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* The command is not executed if nothing was read from stdin.
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* xargs may give up too easily when the command returns nonzero.
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*/
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#define USAGE "usage: xargs [-t] [-l len] [-e endargs] command [args...]\n"
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#include <errno.h>
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#include "internal.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <getopt.h>
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#ifndef MAX_ARGLINE
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# define MAX_ARGLINE 1023
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#endif
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#ifndef min
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# define min(a,b) ((a) < (b) ? (a) : (b))
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#endif
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char outlin[MAX_ARGLINE];
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char inlin[MAX_ARGLINE];
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char startlin[MAX_ARGLINE];
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char *ending = NULL;
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char traceflag = 0;
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int xargs_main(int ac, char **av)
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int xargs_main(int argc, char **argv)
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{
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int outlen, inlen, startlen, endlen=0, i;
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char errflg = 0;
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int maxlin = MAX_ARGLINE;
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char *in_from_stdin = NULL;
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char *args_from_cmdline = NULL;
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char *cmd_to_be_executed = NULL;
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char traceflag = 0;
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int len_args_from_cmdline, len_cmd_to_be_executed, len, opt;
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while ((i = getopt(ac, av, "tl:e:")) != EOF)
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switch (i) {
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case 't': traceflag = 1; break;
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case 'l': maxlin = min(MAX_ARGLINE, atoi(optarg)); break;
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case 'e': ending = optarg; break;
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case '?': errflg++; break;
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}
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if (errflg) {
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fprintf(stderr, USAGE);
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exit(2);
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}
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while ((opt = getopt(argc, argv, "t")) != EOF) {
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switch (opt) {
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case 't':
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traceflag=1;
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break;
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default:
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fatalError(xargs_usage);
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}
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}
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startlin[0] = 0;
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if (optind == ac) {
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strcat(startlin, "echo ");
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}
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else for ( ; optind < ac; optind++) {
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strcat(startlin, av[optind]);
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strcat(startlin, " ");
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}
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startlen = strlen(startlin);
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if (ending) endlen = strlen(ending);
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maxlin = maxlin - 1 - endlen; /* Pre-compute */
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/* Store the command and arguments to be executed (from the command line) */
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if (optind == argc) {
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len_args_from_cmdline = 6;
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args_from_cmdline = xmalloc(len_args_from_cmdline);
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strcat(args_from_cmdline, "echo ");
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} else {
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opt=strlen(argv[optind]);
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len_args_from_cmdline = (opt > 10)? opt : 10;
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args_from_cmdline = xcalloc(len_args_from_cmdline, sizeof(char));
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for (; optind < argc; optind++) {
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if (strlen(argv[optind]) + strlen(args_from_cmdline) >
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len_args_from_cmdline) {
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len_args_from_cmdline += strlen(argv[optind]);
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args_from_cmdline =
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xrealloc(args_from_cmdline,
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len_args_from_cmdline+1);
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}
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strcat(args_from_cmdline, argv[optind]);
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strcat(args_from_cmdline, " ");
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}
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}
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strcpy(outlin, startlin);
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outlen = startlen;
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/* Set up some space for the command to be executed to be held in */
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len_cmd_to_be_executed=10;
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cmd_to_be_executed = xcalloc(len_cmd_to_be_executed, sizeof(char));
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strcpy(cmd_to_be_executed, args_from_cmdline);
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strcat(cmd_to_be_executed, " ");
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while (gets(inlin) != NULL) {
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inlen = strlen(inlin);
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if (maxlin <= (outlen + inlen)) {
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if (outlen == startlen) {
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fprintf(stderr, "%s: Line length too short to process '%s'\n",
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av[0], inlin);
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exit(3);
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}
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if (ending) strcat(outlin, ending);
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if (traceflag) fputs(outlin,stderr);
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errno = 0;
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if (0 != system(outlin)) {
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if (errno != 0) perror("xargs");
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exit(1);
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}
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strcpy(outlin, startlin);
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outlen = startlen;
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}
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strcat(outlin, inlin);
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strcat(outlin, " ");
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outlen = outlen + inlen + 1;
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}
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if (outlen != startlen) {
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if (ending) strcat(outlin, ending);
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if (traceflag) fputs(outlin,stderr);
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errno = 0;
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if (0 != system(outlin)) {
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if (errno != 0) perror("xargs");
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exit(1);
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}
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}
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return 0;
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/* Now, read in one line at a time from stdin, and run command+args on it */
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in_from_stdin = get_line_from_file(stdin);
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for (;in_from_stdin!=NULL;) {
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len = strlen(in_from_stdin) + len_args_from_cmdline;
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if ( len > len_cmd_to_be_executed ) {
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len_cmd_to_be_executed=len+3;
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cmd_to_be_executed=xrealloc(cmd_to_be_executed, len_cmd_to_be_executed);
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}
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strcat(cmd_to_be_executed, in_from_stdin);
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strcat(cmd_to_be_executed+strlen(cmd_to_be_executed)-2, " ");
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strcat(cmd_to_be_executed, " ");
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free(in_from_stdin);
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in_from_stdin = get_line_from_file(stdin);
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}
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if (traceflag==1)
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fputs(cmd_to_be_executed, stderr);
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if ((system(cmd_to_be_executed) != 0) && (errno != 0))
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fatalError("%s", strerror(errno));
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#ifdef BB_FEATURE_CLEAN_UP
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free(args_from_cmdline);
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free(cmd_to_be_executed);
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#endif
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return 0;
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}
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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195
xargs.c
195
xargs.c
@ -1,116 +1,115 @@
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/* minix xargs - Make and execute commands
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* Author: Ian Nicholls: 1 Mar 90 */
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/* vi: set sw=4 ts=4: */
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/*
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* xargs - Accept words from stdin until, combined with the arguments
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* given on the command line, just fit into the command line limit.
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* Then, execute the result.
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* e.g. ls | xargs compress
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* find . -name '*.s' -print | xargs ar qv libc.a
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* Mini xargs implementation for busybox
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*
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* flags: -t Print the command just before it is run
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* -l len Use len as maximum line length (default 490, max 1023)
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* -e ending Append ending to the command before executing it.
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* Copyright (C) 2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* Exits with: 0 No errors.
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* 1 If any system(3) call returns a nonzero status.
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* 2 Usage error
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* 3 Line length too short to contain some single argument.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Examples: xargs ar qv libc.a < liborder # Create a new libc.a
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* find . -name '*.s' -print | xargs rm # Remove all .s files
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* find . -type f ! -name '*.Z' \ # Compress old files.
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* -atime +60 -print | xargs compress -v
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Bugs: If the command contains unquoted wildflags, then the system(3) call
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* call may expand this to larger than the maximum line size.
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* The command is not executed if nothing was read from stdin.
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* xargs may give up too easily when the command returns nonzero.
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*/
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#define USAGE "usage: xargs [-t] [-l len] [-e endargs] command [args...]\n"
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#include <errno.h>
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#include "internal.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <getopt.h>
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#ifndef MAX_ARGLINE
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# define MAX_ARGLINE 1023
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#endif
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#ifndef min
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# define min(a,b) ((a) < (b) ? (a) : (b))
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#endif
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char outlin[MAX_ARGLINE];
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char inlin[MAX_ARGLINE];
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char startlin[MAX_ARGLINE];
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char *ending = NULL;
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char traceflag = 0;
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int xargs_main(int ac, char **av)
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int xargs_main(int argc, char **argv)
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{
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int outlen, inlen, startlen, endlen=0, i;
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char errflg = 0;
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int maxlin = MAX_ARGLINE;
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char *in_from_stdin = NULL;
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char *args_from_cmdline = NULL;
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char *cmd_to_be_executed = NULL;
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char traceflag = 0;
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int len_args_from_cmdline, len_cmd_to_be_executed, len, opt;
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while ((i = getopt(ac, av, "tl:e:")) != EOF)
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switch (i) {
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case 't': traceflag = 1; break;
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case 'l': maxlin = min(MAX_ARGLINE, atoi(optarg)); break;
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case 'e': ending = optarg; break;
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case '?': errflg++; break;
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}
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if (errflg) {
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fprintf(stderr, USAGE);
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exit(2);
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}
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while ((opt = getopt(argc, argv, "t")) != EOF) {
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switch (opt) {
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case 't':
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traceflag=1;
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break;
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default:
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fatalError(xargs_usage);
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}
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}
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startlin[0] = 0;
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if (optind == ac) {
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strcat(startlin, "echo ");
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}
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else for ( ; optind < ac; optind++) {
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strcat(startlin, av[optind]);
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strcat(startlin, " ");
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}
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startlen = strlen(startlin);
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if (ending) endlen = strlen(ending);
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maxlin = maxlin - 1 - endlen; /* Pre-compute */
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/* Store the command and arguments to be executed (from the command line) */
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if (optind == argc) {
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len_args_from_cmdline = 6;
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args_from_cmdline = xmalloc(len_args_from_cmdline);
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strcat(args_from_cmdline, "echo ");
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} else {
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opt=strlen(argv[optind]);
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len_args_from_cmdline = (opt > 10)? opt : 10;
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args_from_cmdline = xcalloc(len_args_from_cmdline, sizeof(char));
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for (; optind < argc; optind++) {
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if (strlen(argv[optind]) + strlen(args_from_cmdline) >
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len_args_from_cmdline) {
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len_args_from_cmdline += strlen(argv[optind]);
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args_from_cmdline =
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xrealloc(args_from_cmdline,
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len_args_from_cmdline+1);
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}
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strcat(args_from_cmdline, argv[optind]);
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strcat(args_from_cmdline, " ");
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}
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}
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strcpy(outlin, startlin);
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outlen = startlen;
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/* Set up some space for the command to be executed to be held in */
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len_cmd_to_be_executed=10;
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cmd_to_be_executed = xcalloc(len_cmd_to_be_executed, sizeof(char));
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strcpy(cmd_to_be_executed, args_from_cmdline);
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strcat(cmd_to_be_executed, " ");
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while (gets(inlin) != NULL) {
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inlen = strlen(inlin);
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if (maxlin <= (outlen + inlen)) {
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if (outlen == startlen) {
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fprintf(stderr, "%s: Line length too short to process '%s'\n",
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av[0], inlin);
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exit(3);
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}
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if (ending) strcat(outlin, ending);
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if (traceflag) fputs(outlin,stderr);
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errno = 0;
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if (0 != system(outlin)) {
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if (errno != 0) perror("xargs");
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exit(1);
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}
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strcpy(outlin, startlin);
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outlen = startlen;
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}
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strcat(outlin, inlin);
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strcat(outlin, " ");
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outlen = outlen + inlen + 1;
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}
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if (outlen != startlen) {
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if (ending) strcat(outlin, ending);
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if (traceflag) fputs(outlin,stderr);
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errno = 0;
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if (0 != system(outlin)) {
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if (errno != 0) perror("xargs");
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exit(1);
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}
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}
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return 0;
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/* Now, read in one line at a time from stdin, and run command+args on it */
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in_from_stdin = get_line_from_file(stdin);
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for (;in_from_stdin!=NULL;) {
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len = strlen(in_from_stdin) + len_args_from_cmdline;
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if ( len > len_cmd_to_be_executed ) {
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len_cmd_to_be_executed=len+3;
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cmd_to_be_executed=xrealloc(cmd_to_be_executed, len_cmd_to_be_executed);
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}
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strcat(cmd_to_be_executed, in_from_stdin);
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strcat(cmd_to_be_executed+strlen(cmd_to_be_executed)-2, " ");
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strcat(cmd_to_be_executed, " ");
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free(in_from_stdin);
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in_from_stdin = get_line_from_file(stdin);
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}
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if (traceflag==1)
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fputs(cmd_to_be_executed, stderr);
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if ((system(cmd_to_be_executed) != 0) && (errno != 0))
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fatalError("%s", strerror(errno));
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#ifdef BB_FEATURE_CLEAN_UP
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free(args_from_cmdline);
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free(cmd_to_be_executed);
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#endif
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return 0;
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}
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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|
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