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 /* $NetBSD: cp.c,v 1.39 2005/10/24 12:59:07 kleink Exp $ */
 
 /*
  * Copyright (c) 1988, 1993, 1994
  *  The Regents of the University of California.  All rights reserved.
  *
  * This code is derived from software contributed to Berkeley by
  * David Hitz of Auspex Systems Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #if 0
 #ifndef lint
 __COPYRIGHT(
 "@(#) Copyright (c) 1988, 1993, 1994\n\
   The Regents of the University of California.  All rights reserved.\n");
 #endif /* not lint */
 
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)cp.c  8.5 (Berkeley) 4/29/95";
 #else
 __RCSID("$NetBSD: cp.c,v 1.39 2005/10/24 12:59:07 kleink Exp $");
 #endif
 #endif /* not lint */
 #endif
 /*
  * Cp copies source files to target files.
  *
  * The global PATH_T structure "to" always contains the path to the
  * current target file.  Since fts(3) does not change directories,
  * this path can be either absolute or dot-relative.
  *
  * The basic algorithm is to initialize "to" and use fts(3) to traverse
  * the file hierarchy rooted in the argument list.  A trivial case is the
  * case of 'cp file1 file2'.  The more interesting case is the case of
  * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the
  * path (relative to the root of the traversal) is appended to dir (stored
  * in "to") to form the final target path.
  */
 
 #include <rtems.h>
 #include <rtems/shell.h>
 #include <rtems/shellconfig.h>
 #define __need_getopt_newlib
 #include <getopt.h>
 
 #include <sys/param.h>
 #include <sys/stat.h>
 
 #include "err.h"
 #include <errno.h>
 #include "fts.h"
 #include <limits.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include "internal.h"
 
 #include "extern-cp.h"
 
 #define S_ISTXT 0
 
 #define STRIP_TRAILING_SLASH(p) {                   \
         while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/')  \
                 *--(p).p_end = 0;                   \
 }
 
 enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
 
 static int Rflag, rflag;
 
 static int main_cp(rtems_shell_cp_globals* cp_globals, int, char *[]);
 static int copy(rtems_shell_cp_globals* cp_globals, char *[], enum op, int);
 static int mastercmp(const FTSENT **, const FTSENT **);
 
 int
 rtems_shell_main_cp(int argc, char *argv[])
 {
   rtems_shell_cp_globals cp_globals;
   memset (&cp_globals, 0, sizeof (cp_globals));
   Rflag = rflag = 0;
   if (setjmp (cp_globals.exit_jmp) == 0)
     return main_cp (&cp_globals, argc, argv);
   return 1;
 }
 
 int
 main_cp(rtems_shell_cp_globals* cp_globals, int argc, char *argv[])
 {
     struct stat to_stat, tmp_stat;
     enum op type;
     int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash;
     char *target;
   struct getopt_data getopt_reent;
 
     Hflag = Lflag = Pflag = 0;
   memset(&getopt_reent, 0, sizeof(getopt_data));
 
     while ((ch = getopt_r(argc, argv, "HLPRafilnprv", &getopt_reent)) != -1)
         switch (ch) {
         case 'H':
             Hflag = 1;
             Lflag = Pflag = 0;
             break;
         case 'L':
             Lflag = 1;
             Hflag = Pflag = 0;
             break;
         case 'P':
             Pflag = 1;
             Hflag = Lflag = 0;
             break;
         case 'R':
             Rflag = 1;
             break;
         case 'a':
             Pflag = 1;
             pflag = 1;
             Rflag = 1;
             Hflag = Lflag = 0;
             break;
         case 'f':
             fflag = 1;
             iflag = nflag = 0;
             break;
         case 'i':
             iflag = 1;
             fflag = nflag = 0;
             break;
         case 'l':
             lflag = 1;
             break;
         case 'n':
             nflag = 1;
             fflag = iflag = 0;
             break;
         case 'p':
             pflag = 1;
             break;
         case 'r':
             rflag = Lflag = 1;
             Hflag = Pflag = 0;
             break;
         case 'v':
             vflag = 1;
             break;
         default:
             usage(cp_globals);
             break;
         }
     argc -= getopt_reent.optind;
     argv += getopt_reent.optind;
 
     if (argc < 2)
         usage(cp_globals);
 
     fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
     if (Rflag && rflag)
         errx(exit_jump, 1, "the -R and -r options may not be specified together");
     if (rflag)
         Rflag = 1;
     if (Rflag) {
         if (Hflag)
             fts_options |= FTS_COMFOLLOW;
         if (Lflag) {
             fts_options &= ~FTS_PHYSICAL;
             fts_options |= FTS_LOGICAL;
         }
     } else {
         fts_options &= ~FTS_PHYSICAL;
         fts_options |= FTS_LOGICAL | FTS_COMFOLLOW;
     }
 #if 0
     (void)signal(SIGINFO, siginfo);
 #endif
 
     /* Save the target base in "to". */
     target = argv[--argc];
     if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
         errx(exit_jump, 1, "%s: name too long", target);
     to.p_end = to.p_path + strlen(to.p_path);
         if (to.p_path == to.p_end) {
         *to.p_end++ = '.';
         *to.p_end = 0;
     }
     have_trailing_slash = (to.p_end[-1] == '/');
     if (have_trailing_slash)
         STRIP_TRAILING_SLASH(to);
     to.target_end = to.p_end;
 
     /* Set end of argument list for fts(3). */
     argv[argc] = NULL;
 
     /*
      * Cp has two distinct cases:
      *
      * cp [-R] source target
      * cp [-R] source1 ... sourceN directory
      *
      * In both cases, source can be either a file or a directory.
      *
      * In (1), the target becomes a copy of the source. That is, if the
      * source is a file, the target will be a file, and likewise for
      * directories.
      *
      * In (2), the real target is not directory, but "directory/source".
      */
     r = stat(to.p_path, &to_stat);
     if (r == -1 && errno != ENOENT)
         err(exit_jump, 1, "%s", to.p_path);
     if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
         /*
          * Case (1).  Target is not a directory.
          */
         if (argc > 1)
             errx(exit_jump, 1, "%s is not a directory", to.p_path);
 
         /*
          * Need to detect the case:
          *  cp -R dir foo
          * Where dir is a directory and foo does not exist, where
          * we want pathname concatenations turned on but not for
          * the initial mkdir().
          */
         if (r == -1) {
             if (Rflag && (Lflag || Hflag))
             #ifdef __rtems__
                 (void)
             #endif
                 stat(*argv, &tmp_stat);
             else
             #ifdef __rtems__
                 (void)
             #endif
                 lstat(*argv, &tmp_stat);
 
             if (S_ISDIR(tmp_stat.st_mode) && Rflag)
                 type = DIR_TO_DNE;
             else
                 type = FILE_TO_FILE;
         } else
             type = FILE_TO_FILE;
 
         if (have_trailing_slash && type == FILE_TO_FILE) {
             if (r == -1)
                 errx(exit_jump, 1, "directory %s does not exist",
                      to.p_path);
             else
                 errx(exit_jump, 1, "%s is not a directory", to.p_path);
         }
     } else
         /*
          * Case (2).  Target is a directory.
          */
         type = FILE_TO_DIR;
 
   return copy(cp_globals, argv, type, fts_options);
 }
 
 int
 copy(rtems_shell_cp_globals* cp_globals,
      char *argv[], enum op type, int fts_options)
 {
     struct stat to_stat;
     FTS *ftsp;
     FTSENT *curr;
     int base = 0, dne, badcp, rval;
     size_t nlen;
     char *p, *target_mid;
     mode_t mask, mode;
 
     /*
      * Keep an inverted copy of the umask, for use in correcting
      * permissions on created directories when not using -p.
      */
     mask = ~umask(0777);
     umask(~mask);
 
     if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
         err(exit_jump, 1, "fts_open");
     for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
         switch (curr->fts_info) {
         case FTS_NS:
         case FTS_DNR:
         case FTS_ERR:
             warnx("%s: %s",
                 curr->fts_path, strerror(curr->fts_errno));
         #ifdef __rtems__
         /*
          * Coverity spotted that badcp is set by each loop
          * iteration so setting it right before continue
          * results in the value being unused. See CID 1255344
          *
          * The current NetBSD source (v1.62) was checked and
          * the same issue appears to apply although the
          * variable names have changed since this was imported
          * to RTEMS.
          *
          * This pattern exists in multiple places in this file.
          */
             rval = 1;
         #else
             badcp = rval = 1;
         #endif
             continue;
         case FTS_DC:            /* Warn, continue. */
             warnx("%s: directory causes a cycle", curr->fts_path);
         #ifdef __rtems__
             rval = 1;
         #else
             badcp = rval = 1;
         #endif
             continue;
         default:
             ;
         }
 
         /*
          * If we are in case (2) or (3) above, we need to append the
                  * source name to the target name.
                  */
         if (type != FILE_TO_FILE) {
             /*
              * Need to remember the roots of traversals to create
              * correct pathnames.  If there's a directory being
              * copied to a non-existent directory, e.g.
              *  cp -R a/dir noexist
              * the resulting path name should be noexist/foo, not
              * noexist/dir/foo (where foo is a file in dir), which
              * is the case where the target exists.
              *
              * Also, check for "..".  This is for correct path
              * concatenation for paths ending in "..", e.g.
              *  cp -R .. /tmp
              * Paths ending in ".." are changed to ".".  This is
              * tricky, but seems the easiest way to fix the problem.
              *
              * XXX
              * Since the first level MUST be FTS_ROOTLEVEL, base
              * is always initialized.
              */
             if (curr->fts_level == FTS_ROOTLEVEL) {
                 if (type != DIR_TO_DNE) {
                     p = strrchr(curr->fts_path, '/');
                     base = (p == NULL) ? 0 :
                         (int)(p - curr->fts_path + 1);
 
                     if (!strcmp(&curr->fts_path[base],
                         ".."))
                         base += 1;
                 } else
                     base = curr->fts_pathlen;
             }
 
             p = &curr->fts_path[base];
             nlen = curr->fts_pathlen - base;
             target_mid = to.target_end;
             if (*p != '/' && target_mid[-1] != '/')
                 *target_mid++ = '/';
             *target_mid = 0;
             if (target_mid - to.p_path + nlen >= PATH_MAX) {
                 warnx("%s%s: name too long (not copied)",
                     to.p_path, p);
             #ifdef __rtems__
                 rval = 1;
             #else
                 badcp = rval = 1;
             #endif
                 continue;
             }
             (void)strncat(target_mid, p, nlen);
             to.p_end = target_mid + nlen;
             *to.p_end = 0;
             STRIP_TRAILING_SLASH(to);
         }
 
         if (curr->fts_info == FTS_DP) {
             /*
              * We are nearly finished with this directory.  If we
              * didn't actually copy it, or otherwise don't need to
              * change its attributes, then we are done.
              */
             if (!curr->fts_number)
                 continue;
             /*
              * If -p is in effect, set all the attributes.
              * Otherwise, set the correct permissions, limited
              * by the umask.  Optimise by avoiding a chmod()
              * if possible (which is usually the case if we
              * made the directory).  Note that mkdir() does not
              * honour setuid, setgid and sticky bits, but we
              * normally want to preserve them on directories.
              */
             if (pflag) {
                 if (setfile(cp_globals, curr->fts_statp, -1))
                     rval = 1;
                 if (preserve_dir_acls(curr->fts_statp,
                     curr->fts_accpath, to.p_path) != 0)
                     rval = 1;
             } else {
                 mode = curr->fts_statp->st_mode;
                 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) ||
                     ((mode | S_IRWXU) & mask) != (mode & mask))
                     if (chmod(to.p_path, mode & mask) != 0){
                         warn("chmod: %s", to.p_path);
                         rval = 1;
                     }
             }
             continue;
         }
 
         /* Not an error but need to remember it happened */
         if (stat(to.p_path, &to_stat) == -1)
             dne = 1;
         else {
             if (to_stat.st_dev == curr->fts_statp->st_dev &&
                 to_stat.st_ino == curr->fts_statp->st_ino) {
                 warnx("%s and %s are identical (not copied).",
                     to.p_path, curr->fts_path);
             #ifdef __rtems__
                 rval = 1;
             #else
                 badcp = rval = 1;
             #endif
                 if (S_ISDIR(curr->fts_statp->st_mode))
                     (void)fts_set(ftsp, curr, FTS_SKIP);
                 continue;
             }
             if (!S_ISDIR(curr->fts_statp->st_mode) &&
                 S_ISDIR(to_stat.st_mode)) {
                 warnx("cannot overwrite directory %s with "
                     "non-directory %s",
                     to.p_path, curr->fts_path);
             #ifdef __rtems__
                 rval = 1;
             #else
                 badcp = rval = 1;
             #endif
                 continue;
             }
             dne = 0;
         }
 
         switch (curr->fts_statp->st_mode & S_IFMT) {
         case S_IFLNK:
             /* Catch special case of a non-dangling symlink */
             if ((fts_options & FTS_LOGICAL) ||
                 ((fts_options & FTS_COMFOLLOW) &&
                 curr->fts_level == 0)) {
                 if (copy_file(cp_globals, curr, dne))
                     badcp = rval = 1;
             } else {
                 if (copy_link(cp_globals, curr, !dne))
                     badcp = rval = 1;
             }
             break;
         case S_IFDIR:
             if (!Rflag) {
                 warnx("%s is a directory (not copied).",
                     curr->fts_path);
                 (void)fts_set(ftsp, curr, FTS_SKIP);
                 badcp = rval = 1;
                 break;
             }
             /*
              * If the directory doesn't exist, create the new
              * one with the from file mode plus owner RWX bits,
              * modified by the umask.  Trade-off between being
              * able to write the directory (if from directory is
              * 555) and not causing a permissions race.  If the
              * umask blocks owner writes, we fail..
              */
             if (dne) {
                 if (mkdir(to.p_path,
                     curr->fts_statp->st_mode | S_IRWXU) < 0)
                     err(exit_jump, 1, "%s", to.p_path);
             } else if (!S_ISDIR(to_stat.st_mode)) {
                 errno = ENOTDIR;
                 err(exit_jump, 1, "%s", to.p_path);
             }
             /*
              * Arrange to correct directory attributes later
              * (in the post-order phase) if this is a new
              * directory, or if the -p flag is in effect.
              */
             curr->fts_number = pflag || dne;
             break;
         case S_IFBLK:
         case S_IFCHR:
             if (Rflag) {
                 if (copy_special(cp_globals, curr->fts_statp, !dne))
                     badcp = rval = 1;
             } else {
                 if (copy_file(cp_globals, curr, dne))
                     badcp = rval = 1;
             }
             break;
         case S_IFSOCK:
             warnx("%s is a socket (not copied).",
                     curr->fts_path);
         case S_IFIFO:
             if (Rflag) {
                 if (copy_fifo(cp_globals, curr->fts_statp, !dne))
                     badcp = rval = 1;
             } else {
                 if (copy_file(cp_globals, curr, dne))
                     badcp = rval = 1;
             }
             break;
         default:
             if (copy_file(cp_globals, curr, dne))
                 badcp = rval = 1;
             break;
         }
         if (vflag && !badcp)
             (void)printf("%s -> %s\n", curr->fts_path, to.p_path);
     }
     if (errno)
         err(exit_jump, 1, "fts_read");
     fts_close(ftsp);
     return (rval);
 }
 
 /*
  * mastercmp --
  *  The comparison function for the copy order.  The order is to copy
  *  non-directory files before directory files.  The reason for this
  *  is because files tend to be in the same cylinder group as their
  *  parent directory, whereas directories tend not to be.  Copying the
  *  files first reduces seeking.
  */
 int
 mastercmp(const FTSENT **a, const FTSENT **b)
 {
     int a_info, b_info;
 
     a_info = (*a)->fts_info;
     if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR)
         return (0);
     b_info = (*b)->fts_info;
     if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR)
         return (0);
     if (a_info == FTS_D)
         return (-1);
     if (b_info == FTS_D)
         return (1);
     return (0);
 }
 
 rtems_shell_cmd_t rtems_shell_CP_Command = {
   "cp",                                                /* name */
   "cp [-R [-H | -L | -P]] [-f | -i] [-pv] src target", /* usage */
   "files",                                             /* topic */
   rtems_shell_main_cp,                                 /* command */
   NULL,                                                /* alias */
   NULL                                                 /* next */
 };
 

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