diff options
| -rw-r--r-- | findutils/xargs.c | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/findutils/xargs.c b/findutils/xargs.c index bb5987e..471bae4 100644 --- a/findutils/xargs.c +++ b/findutils/xargs.c @@ -28,8 +28,10 @@ int xargs_main(int argc, char **argv) { - char *cmd_to_be_executed = NULL; - char *file_to_act_on = NULL; + char *cmd_to_be_executed; + char *file_to_act_on; + int i; + int len; /* * No options are supported in this version of xargs; no getopt. @@ -42,41 +44,41 @@ int xargs_main(int argc, char **argv) * once with no args and xargs will echo the filename. Simple. */ + argv++; + len = argc; /* arg = count for ' ' + trailing '\0' */ /* 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 "); + argv[0] = "/bin/echo"; + len++; /* space for trailing '\0' */ } else { - /* concatenate all the arguments passed to xargs together */ - int i; - int len = 0; - for (i = 1; i < argc; i++) - len += ( strlen(argv[i]) + 1 ); - cmd_to_be_executed = xstrndup ( "", len ); - for (i = 1; i < argc; i++) { - strcat(cmd_to_be_executed, argv[i]); - strcat(cmd_to_be_executed, " "); + argc--; } + /* concatenate all the arguments passed to xargs together */ + for (i = 0; i < argc; i++) + len += strlen(argv[i]); + cmd_to_be_executed = xmalloc (len); + for (i = len = 0; i < argc; i++) { + len = sprintf(cmd_to_be_executed + len, "%s ", argv[i]); } /* 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; + FILE *cmd_output; + char *output_line; + char *execstr; /* eat the newline off the filename. */ chomp(file_to_act_on); /* eat blank lines */ - if (strlen(file_to_act_on) == 0) + if (file_to_act_on[0] == 0) continue; /* assemble the command and execute it */ - execstr = xstrndup ( cmd_to_be_executed, xstrlen(cmd_to_be_executed) + xstrlen(file_to_act_on)); - strcat(execstr, file_to_act_on); + bb_asprintf(&execstr, "%s%s", cmd_to_be_executed, file_to_act_on); cmd_output = popen(execstr, "r"); if (cmd_output == NULL) |