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rmdir.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*                  Copyright (c) 1992-2005 AT&T Corp.                  *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                            by AT&T Corp.                             *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * Glenn Fowler
 * AT&T Research
 *
 * rmdir
 */

static const char usage[] =
"[-?\n@(#)$Id: rmdir (AT&T Labs Research) 1999-04-20 $\n]"
USAGE_LICENSE
"[+NAME?rmdir - remove empty directories]"
"[+DESCRIPTION?\brmdir\b deletes each given directory.  The directory "
      "must be empty; containing no entries other than \b.\b or \b..\b.  "
      "If a directory and a subdirectory of that directory are specified "
      "as operands, the subdirectory must be specified before the parent "
      "so that the parent directory will be empty when \brmdir\b attempts "
      "to remove it.]"
"[p:parents?Remove each explicit \adirectory\a argument directory that "
      "becomes empty after its child directories are removed.]"
"\n"
"\ndirectory ...\n"
"\n"
"[+EXIT STATUS?]{"
        "[+0?All directories deleted successfully.]"
        "[+>0?One or more directories could not be deleted.]"
"}"
"[+SEE ALSO?\bmkdir\b(1), \brm\b(1)]"
;

#include <cmdlib.h>

int
b_rmdir(int argc, char** argv, void* context)
{
      register char*    dir;
      register char*    end;
      register int      n;
      int         pflag = 0;

      NoP(argc);
      cmdinit(argv, context, ERROR_CATALOG, 0);
      while (n = optget(argv, usage)) switch (n)
      {
      case 'p':
            pflag = 1;
            break;
      case ':':
            error(2, "%s", opt_info.arg);
            break;
      case '?':
            error(ERROR_usage(2), "%s", opt_info.arg);
            break;
      }
      argv += opt_info.index;
      if (error_info.errors || !*argv)
            error(ERROR_usage(2), "%s", optusage(NiL));
      while (dir = *argv++)
      {
            end = dir;
            if (pflag) end += strlen(dir);
            n = 0;
            for (;;)
            {
                  if (rmdir(dir) < 0)
                  {
                        error(ERROR_system(0), "%s: cannot remove", dir);
                        break;
                  }
                  if (n) *end = '/';
                  else n = 1;
                  do if (end <= dir) goto next; while (*--end != '/');
                  do if (end <= dir) goto next; while (*(end - 1) == '/' && end--);
                  *end = 0;
            }
      next: ;
      }
      return(error_info.errors != 0);
}


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