Brand new version of xargs. Tested thoroughly by Kent Robotti. (Domo arigato,
Mr. Robotti...) Closes bug #1065.
This commit is contained in:
Mark Whitley
parent
3c5ee9a379
commit
e2e2c29ea1
@ -1,9 +1,9 @@
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/* 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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* Remixed by Mark Whitley <markw@lineo.com>, <markw@enol.com>
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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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@ -22,138 +22,87 @@
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*/
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#include "busybox.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdlib.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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#include <sys/types.h>
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#include <sys/wait.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 = 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=0, len_cmd_to_be_executed, opt;
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pid_t pid;
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int wpid, status;
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char *file_to_act_on = NULL;
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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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/*
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* No options are supported in this version of xargs; no getopt.
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*
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* Re: The missing -t flag: Most programs that produce output also print
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* the filename, so xargs doesn't really need to do it again. Supporting
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* the -t flag =greatly= bloats up the size of this app and the memory it
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* uses because you have to buffer all the input file strings in memory. If
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* you really want to see the filenames that xargs will act on, just run it
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* once with no args and xargs will echo the filename. Simple.
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*/
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/* Store the command to be executed (taken from the command line) */
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if (argc == 0) {
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len_cmd_to_be_executed=6;
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cmd_to_be_executed = xmalloc(len_cmd_to_be_executed);
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strcat(cmd_to_be_executed, "echo");
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if (argc == 1) {
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/* default behavior is to echo all the filenames */
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cmd_to_be_executed = strdup("/bin/echo ");
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} else {
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opt=strlen(*argv);
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len_cmd_to_be_executed = (opt > 10)? opt : 10;
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cmd_to_be_executed = xcalloc(len_cmd_to_be_executed, sizeof(char));
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strcat(cmd_to_be_executed, *argv);
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/* concatenate all the arguments passed to xargs together */
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int i;
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int len = 1; /* for the '\0' */
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for (i = 1; i < argc; i++) {
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len += strlen(argv[i]);
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len += 1; /* for the space between the args */
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cmd_to_be_executed = xrealloc(cmd_to_be_executed, len);
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strcat(cmd_to_be_executed, argv[i]);
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strcat(cmd_to_be_executed, " ");
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}
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}
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//args=xrealloc(args, len_args);
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// strcpy(args, " ");
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/* Now, read in one line at a time from stdin, and store this
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* line to be used later as an argument to the command */
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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_args += opt + 3;
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args=xrealloc(args, len_args);
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while ((file_to_act_on = get_line_from_file(stdin)) !=NULL) {
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/* Strip out the final \n */
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in_from_stdin[opt-1]=' ';
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FILE *cmd_output = NULL;
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char *output_line = NULL;
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char *execstr = NULL;
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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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/* eat the newline off the filename. */
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if (file_to_act_on[strlen(file_to_act_on)-1] == '\n')
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file_to_act_on[strlen(file_to_act_on)-1] = '\0';
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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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/* eat blank lines */
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if (strlen(file_to_act_on) == 0)
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continue;
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/* assemble the command and execute it */
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execstr = xcalloc(strlen(cmd_to_be_executed) +
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strlen(file_to_act_on) + 1, sizeof(char));
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strcat(execstr, cmd_to_be_executed);
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strcat(execstr, file_to_act_on);
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cmd_output = popen(execstr, "r");
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if (cmd_output == NULL) {
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perror("popen");
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exit(1);
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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(args, tmp);
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strcat(args, " ");
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free(in_from_stdin);
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in_from_stdin = get_line_from_file(stdin);
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/* harvest the output */
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while ((output_line = get_line_from_file(cmd_output)) != NULL) {
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fputs(output_line, stdout);
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free(output_line);
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}
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if ((pid = fork()) == 0) {
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char *cmd[255];
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int i=1;
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if (traceflag==1) {
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fprintf(stderr, "%s ", cmd_to_be_executed);
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/* clean up */
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pclose(cmd_output);
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free(execstr);
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free(file_to_act_on);
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}
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cmd[0] = cmd_to_be_executed;
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while (--argc && ++argv && *argv ) {
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if (traceflag==1) {
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fprintf(stderr, "%s ", *argv);
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}
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cmd[i++]=*argv;
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}
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if (traceflag==1) {
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fprintf(stderr, "%s\n", args);
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}
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cmd[i++] = args;
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cmd[i] = NULL;
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execvp(cmd_to_be_executed, cmd);
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/* What? Still here? Exit with an error */
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fatalError("%s: %s\n", cmd_to_be_executed, strerror(errno));
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}
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/* Wait for a child process to exit */
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wpid = wait(&status);
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#ifdef BB_FEATURE_CLEAN_UP
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free(args);
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free(cmd_to_be_executed);
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#endif
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if (wpid > 0)
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return (WEXITSTATUS(status));
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else
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return EXIT_FAILURE;
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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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/* vi: set sw=4 ts=4: */
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165
xargs.c
165
xargs.c
@ -1,9 +1,9 @@
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/* 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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* Remixed by Mark Whitley <markw@lineo.com>, <markw@enol.com>
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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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@ -22,138 +22,87 @@
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*/
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#include "busybox.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdlib.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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#include <sys/types.h>
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#include <sys/wait.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 = 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=0, len_cmd_to_be_executed, opt;
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pid_t pid;
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int wpid, status;
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char *file_to_act_on = NULL;
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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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/*
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* No options are supported in this version of xargs; no getopt.
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*
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* Re: The missing -t flag: Most programs that produce output also print
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* the filename, so xargs doesn't really need to do it again. Supporting
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* the -t flag =greatly= bloats up the size of this app and the memory it
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* uses because you have to buffer all the input file strings in memory. If
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* you really want to see the filenames that xargs will act on, just run it
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* once with no args and xargs will echo the filename. Simple.
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*/
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/* Store the command to be executed (taken from the command line) */
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if (argc == 0) {
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len_cmd_to_be_executed=6;
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cmd_to_be_executed = xmalloc(len_cmd_to_be_executed);
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strcat(cmd_to_be_executed, "echo");
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if (argc == 1) {
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/* default behavior is to echo all the filenames */
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cmd_to_be_executed = strdup("/bin/echo ");
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} else {
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opt=strlen(*argv);
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len_cmd_to_be_executed = (opt > 10)? opt : 10;
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cmd_to_be_executed = xcalloc(len_cmd_to_be_executed, sizeof(char));
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strcat(cmd_to_be_executed, *argv);
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/* concatenate all the arguments passed to xargs together */
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int i;
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int len = 1; /* for the '\0' */
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for (i = 1; i < argc; i++) {
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len += strlen(argv[i]);
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len += 1; /* for the space between the args */
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cmd_to_be_executed = xrealloc(cmd_to_be_executed, len);
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strcat(cmd_to_be_executed, argv[i]);
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strcat(cmd_to_be_executed, " ");
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}
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}
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//args=xrealloc(args, len_args);
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// strcpy(args, " ");
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/* Now, read in one line at a time from stdin, and store this
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* line to be used later as an argument to the command */
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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_args += opt + 3;
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args=xrealloc(args, len_args);
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while ((file_to_act_on = get_line_from_file(stdin)) !=NULL) {
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/* Strip out the final \n */
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in_from_stdin[opt-1]=' ';
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FILE *cmd_output = NULL;
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char *output_line = NULL;
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char *execstr = NULL;
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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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/* eat the newline off the filename. */
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if (file_to_act_on[strlen(file_to_act_on)-1] == '\n')
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file_to_act_on[strlen(file_to_act_on)-1] = '\0';
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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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/* eat blank lines */
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if (strlen(file_to_act_on) == 0)
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continue;
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/* assemble the command and execute it */
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execstr = xcalloc(strlen(cmd_to_be_executed) +
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strlen(file_to_act_on) + 1, sizeof(char));
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strcat(execstr, cmd_to_be_executed);
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strcat(execstr, file_to_act_on);
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cmd_output = popen(execstr, "r");
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if (cmd_output == NULL) {
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perror("popen");
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exit(1);
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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(args, tmp);
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strcat(args, " ");
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free(in_from_stdin);
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in_from_stdin = get_line_from_file(stdin);
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/* harvest the output */
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while ((output_line = get_line_from_file(cmd_output)) != NULL) {
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fputs(output_line, stdout);
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free(output_line);
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}
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if ((pid = fork()) == 0) {
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char *cmd[255];
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int i=1;
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if (traceflag==1) {
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fprintf(stderr, "%s ", cmd_to_be_executed);
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/* clean up */
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pclose(cmd_output);
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free(execstr);
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free(file_to_act_on);
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}
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cmd[0] = cmd_to_be_executed;
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while (--argc && ++argv && *argv ) {
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if (traceflag==1) {
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fprintf(stderr, "%s ", *argv);
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}
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cmd[i++]=*argv;
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}
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if (traceflag==1) {
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fprintf(stderr, "%s\n", args);
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}
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cmd[i++] = args;
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cmd[i] = NULL;
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execvp(cmd_to_be_executed, cmd);
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/* What? Still here? Exit with an error */
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fatalError("%s: %s\n", cmd_to_be_executed, strerror(errno));
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}
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/* Wait for a child process to exit */
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wpid = wait(&status);
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#ifdef BB_FEATURE_CLEAN_UP
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free(args);
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free(cmd_to_be_executed);
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#endif
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if (wpid > 0)
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return (WEXITSTATUS(status));
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else
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return EXIT_FAILURE;
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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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/* vi: set sw=4 ts=4: */
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Reference in New Issue
Block a user