1 /* vi: set sw=4 ts=4: */
3 * Mini xargs implementation for busybox
5 * Copyright (C) 2000 by Lineo, inc.
6 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 int xargs_main(int argc, char **argv)
35 char *in_from_stdin = NULL;
36 char *args_from_cmdline = NULL;
37 char *cmd_to_be_executed = NULL;
39 int len_args_from_cmdline, len_cmd_to_be_executed, len, opt;
41 /* Note that we do not use getopt here, since
42 * we only want to interpret initial options,
43 * not options passed to commands */
44 while (--argc && **(++argv) == '-') {
51 fatalError(xargs_usage);
56 /* Store the command and arguments to be executed (from the command line) */
58 len_args_from_cmdline = 6;
59 args_from_cmdline = xmalloc(len_args_from_cmdline);
60 strcat(args_from_cmdline, "echo ");
63 len_args_from_cmdline = (opt > 10)? opt : 10;
64 args_from_cmdline = xcalloc(len_args_from_cmdline, sizeof(char));
66 if (strlen(*argv) + strlen(args_from_cmdline) >
67 len_args_from_cmdline) {
68 len_args_from_cmdline += strlen(*argv);
70 xrealloc(args_from_cmdline,
71 len_args_from_cmdline+1);
73 strcat(args_from_cmdline, *argv);
74 strcat(args_from_cmdline, " ");
78 /* Set up some space for the command to be executed to be held in */
79 len_cmd_to_be_executed=10;
80 cmd_to_be_executed = xcalloc(len_cmd_to_be_executed, sizeof(char));
81 strcpy(cmd_to_be_executed, args_from_cmdline);
82 strcat(cmd_to_be_executed, " \"");
84 /* Now, read in one line at a time from stdin, and run command+args on it */
85 in_from_stdin = get_line_from_file(stdin);
86 for (;in_from_stdin!=NULL;) {
88 opt = strlen(in_from_stdin);
89 len = opt + len_args_from_cmdline;
90 len_cmd_to_be_executed+=len+3;
91 cmd_to_be_executed=xrealloc(cmd_to_be_executed, len_cmd_to_be_executed);
93 /* Strip out the final \n */
94 in_from_stdin[opt-1]=' ';
96 /* Replace any tabs with spaces */
97 while( (tmp = strchr(in_from_stdin, '\t')) != NULL )
100 /* Strip out any extra intra-word spaces */
101 while( (tmp = strstr(in_from_stdin, " ")) != NULL ) {
102 opt = strlen(in_from_stdin);
103 memmove(tmp, tmp+1, opt-(tmp-in_from_stdin));
106 /* trim trailing whitespace */
107 opt = strlen(in_from_stdin) - 1;
108 while (isspace(in_from_stdin[opt]))
110 in_from_stdin[++opt] = 0;
112 /* Strip out any leading whitespace */
117 strcat(cmd_to_be_executed, tmp);
118 strcat(cmd_to_be_executed, " ");
121 in_from_stdin = get_line_from_file(stdin);
124 strcat(cmd_to_be_executed, "\"");
126 fputs(cmd_to_be_executed, stderr);
128 if ((system(cmd_to_be_executed) != 0) && (errno != 0))
129 fatalError("%s", strerror(errno));
132 #ifdef BB_FEATURE_CLEAN_UP
133 free(args_from_cmdline);
134 free(cmd_to_be_executed);
141 c-file-style: "linux"