147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini xargs implementation for busybox
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*
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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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* 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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* 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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*/
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#include "internal.h"
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#include <stdlib.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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#include <ctype.h>
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int xargs_main(int argc, char **argv)
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{
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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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/* Note that we do not use getopt here, since
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* we only want to interpret initial options,
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* not options passed to commands */
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while (--argc && **(++argv) == '-') {
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while (*++(*argv)) {
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switch (**argv) {
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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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}
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/* Store the command and arguments to be executed (from the command line) */
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if (argc == 1) {
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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);
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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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while (argc-- > 0) {
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if (strlen(*argv) + strlen(args_from_cmdline) >
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len_args_from_cmdline) {
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len_args_from_cmdline += strlen(*argv);
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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);
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strcat(args_from_cmdline, " ");
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}
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}
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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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/* 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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char *tmp;
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opt = strlen(in_from_stdin);
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len = opt + len_args_from_cmdline;
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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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/* Strip out the final \n */
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in_from_stdin[opt-1]=' ';
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/* Replace any tabs with spaces */
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while( (tmp = strchr(in_from_stdin, '\t')) != NULL )
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*tmp=' ';
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/* Strip out any extra intra-word spaces */
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while( (tmp = strstr(in_from_stdin, " ")) != NULL ) {
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opt = strlen(in_from_stdin);
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memmove(tmp, tmp+1, opt-(tmp-in_from_stdin));
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}
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/* trim trailing whitespace */
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opt = strlen(in_from_stdin) - 1;
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while (isspace(in_from_stdin[opt]))
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opt--;
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in_from_stdin[++opt] = 0;
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/* Strip out any leading whitespace */
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tmp=in_from_stdin;
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while(isspace(*tmp))
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tmp++;
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strcat(cmd_to_be_executed, tmp);
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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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strcat(cmd_to_be_executed, "\"");
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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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