mirror of
https://github.com/sheumann/hush.git
synced 2024-11-09 02:09:01 +00:00
106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
|
|
* Mini xargs implementation for busybox
|
|
*
|
|
* Copyright (C) 1999,2000,2001 by Lineo, inc.
|
|
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
|
|
* Remixed by Mark Whitley <markw@lineo.com>, <markw@codepoet.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "busybox.h"
|
|
|
|
int xargs_main(int argc, char **argv)
|
|
{
|
|
char *cmd_to_be_executed = NULL;
|
|
char *file_to_act_on = NULL;
|
|
|
|
/*
|
|
* No options are supported in this version of xargs; no getopt.
|
|
*
|
|
* Re: The missing -t flag: Most programs that produce output also print
|
|
* the filename, so xargs doesn't really need to do it again. Supporting
|
|
* the -t flag =greatly= bloats up the size of this app and the memory it
|
|
* uses because you have to buffer all the input file strings in memory. If
|
|
* you really want to see the filenames that xargs will act on, just run it
|
|
* once with no args and xargs will echo the filename. Simple.
|
|
*/
|
|
|
|
/* Store the command to be executed (taken from the command line) */
|
|
if (argc == 1) {
|
|
/* default behavior is to echo all the filenames */
|
|
cmd_to_be_executed = xstrdup("/bin/echo ");
|
|
} else {
|
|
/* concatenate all the arguments passed to xargs together */
|
|
int i;
|
|
int len = 1; /* for the '\0' */
|
|
for (i = 1; i < argc; i++) {
|
|
len += strlen(argv[i]);
|
|
len += 1; /* for the space between the args */
|
|
cmd_to_be_executed = xrealloc(cmd_to_be_executed, len);
|
|
strcat(cmd_to_be_executed, argv[i]);
|
|
strcat(cmd_to_be_executed, " ");
|
|
}
|
|
}
|
|
|
|
/* Now, read in one line at a time from stdin, and store this
|
|
* line to be used later as an argument to the command */
|
|
while ((file_to_act_on = get_line_from_file(stdin)) !=NULL) {
|
|
|
|
FILE *cmd_output = NULL;
|
|
char *output_line = NULL;
|
|
char *execstr = NULL;
|
|
|
|
/* eat the newline off the filename. */
|
|
chomp(file_to_act_on);
|
|
|
|
/* eat blank lines */
|
|
if (strlen(file_to_act_on) == 0)
|
|
continue;
|
|
|
|
/* assemble the command and execute it */
|
|
execstr = xcalloc(strlen(cmd_to_be_executed) +
|
|
strlen(file_to_act_on) + 1, sizeof(char));
|
|
strcat(execstr, cmd_to_be_executed);
|
|
strcat(execstr, file_to_act_on);
|
|
cmd_output = popen(execstr, "r");
|
|
if (cmd_output == NULL)
|
|
perror_msg_and_die("popen");
|
|
|
|
/* harvest the output */
|
|
while ((output_line = get_line_from_file(cmd_output)) != NULL) {
|
|
fputs(output_line, stdout);
|
|
free(output_line);
|
|
}
|
|
|
|
/* clean up */
|
|
pclose(cmd_output);
|
|
free(execstr);
|
|
free(file_to_act_on);
|
|
}
|
|
|
|
#ifdef BB_FEATURE_CLEAN_UP
|
|
free(cmd_to_be_executed);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* vi: set sw=4 ts=4: */
|