/********************************************************************* Example source code for using the argtable2 library to implement: rm [-dfirv] [--help] [--version] <file> [<file>]... This file is part of the argtable2 library. Copyright (C) 1998-2001,2003-2011 Stewart Heitmann sheitmann@users.sourceforge.net The argtable2 library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This software 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. **********************************************************************/ #include "argtable2.h" /* Here we only simulate the rm functionality */ void mymain(int d, int f, int i, int r, int v, const char** files, int nfiles) { int j; /* if verbose option was given then display all option settings */ if (v) { printf("remove directories = %s\n", ((d)?"YES":"NO")); printf("force removal = %s\n", ((f)?"YES":"NO")); printf("interactive mode = %s\n", ((i)?"YES":"NO")); printf("recurse directories = %s\n", ((r)?"YES":"NO")); printf("verbose messages = %s\n", ((v)?"YES":"NO")); } /* print the filenames that would be deleted if this really was the "rm" function */ for (j=0; j<nfiles; j++) printf("unlinking \"%s\"\n", files[j]); printf("%d files total\n",nfiles); } int main(int argc, char **argv) { const char* progname = "rm"; struct arg_lit *dir = arg_lit0("d", "directory", "unlink file(s), even if it is a non-empty directory"); struct arg_rem *dir2 = arg_rem( NULL, "(super-user only)"); struct arg_lit *force = arg_lit0("f", "force", "ignore nonexistant files, never prompt"); struct arg_lit *inter = arg_lit0("i", "interactive", "prompt before any removal"); struct arg_lit *recur = arg_lit0("rR","recursive", "remove the contents of directories recursively"); struct arg_lit *verb = arg_lit0("v", "verbose", "explain what is being done"); struct arg_lit *help = arg_lit0(NULL,"help", "print this help and exit"); struct arg_lit *vers = arg_lit0(NULL,"version", "print version information and exit"); struct arg_file *files = arg_filen(NULL,NULL,NULL,1,argc+2,NULL); struct arg_end *end = arg_end(20); void* argtable[] = {dir,dir2,force,inter,recur,verb,help,vers,files,end}; int exitcode=0; int nerrors; /* verify the argtable[] entries were allocated sucessfully */ if (arg_nullcheck(argtable) != 0) { /* NULL entries were detected, some allocations must have failed */ printf("%s: insufficient memory\n",progname); exitcode=1; goto exit; } /* Parse the command line as defined by argtable[] */ nerrors = arg_parse(argc,argv,argtable); /* special case: '--help' takes precedence over error reporting */ if (help->count > 0) { printf("Usage: %s", progname); arg_print_syntax(stdout,argtable,"\n"); printf("Remove (unlink) the specified file(s).\n\n"); arg_print_glossary(stdout,argtable," %-20s %s\n"); printf("\nReport bugs to <no-one> as this is just an example program.\n"); exitcode=0; goto exit; } /* special case: '--version' takes precedence error reporting */ if (vers->count > 0) { printf("'%s' example program for the \"argtable\" command line argument parser.\n",progname); printf("September 2003, Stewart Heitmann\n"); exitcode=0; goto exit; } /* If the parser returned any errors then display them and exit */ if (nerrors > 0) { /* Display the error details contained in the arg_end struct.*/ arg_print_errors(stdout,end,progname); printf("Try '%s --help' for more information.\n",progname); exitcode=1; goto exit; } /* command line options are all ok, now perform the "rm" functionality */ mymain(dir->count, force->count, inter->count, recur->count, verb->count, files->filename, files->count); exit: /* deallocate each non-null entry in argtable[] */ arg_freetable(argtable,sizeof(argtable)/sizeof(argtable[0])); return exitcode; }