1 files changed, 677 insertions, 0 deletions

diff --git a/gnu/usr.bin/tar/gnu.c b/gnu/usr.bin/tar/gnu.c
new file mode 100644
index 0000000..ef51f2b
--- /dev/null
+++ b/gnu/usr.bin/tar/gnu.c
@@ -0,0 +1,677 @@
+/* GNU dump extensions to tar.
+   Copyright (C) 1988, 1992, 1993 Free Software Foundation
+
+This file is part of GNU Tar.
+
+GNU Tar is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Tar 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Tar; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <ctype.h>
+#include <errno.h>
+#ifndef STDC_HEADERS
+extern int errno;
+#endif
+#include <time.h>
+time_t time ();
+
+#include "tar.h"
+#include "port.h"
+
+#ifndef S_ISLNK
+#define lstat stat
+#endif
+
+extern time_t new_time;
+extern FILE *msg_file;
+
+void addname ();
+int check_exclude ();
+extern PTR ck_malloc ();
+extern PTR ck_realloc ();
+int confirm ();
+extern PTR init_buffer ();
+extern char *get_buffer ();
+int is_dot_or_dotdot ();
+extern void add_buffer ();
+extern void flush_buffer ();
+void name_gather ();
+int recursively_delete ();
+void skip_file ();
+char *un_quote_string ();
+
+extern char *new_name ();
+
+static void add_dir_name ();
+
+struct dirname
+  {
+    struct dirname *next;
+    char *name;
+    char *dir_text;
+    int dev;
+    int ino;
+    int allnew;
+  };
+static struct dirname *dir_list;
+static time_t this_time;
+
+void
+add_dir (name, dev, ino, text)
+     char *name;
+     char *text;
+     dev_t dev;
+     ino_t ino;
+{
+  struct dirname *dp;
+
+  dp = (struct dirname *) ck_malloc (sizeof (struct dirname));
+  if (!dp)
+    abort ();
+  dp->next = dir_list;
+  dir_list = dp;
+  dp->dev = dev;
+  dp->ino = ino;
+  dp->name = ck_malloc (strlen (name) + 1);
+  strcpy (dp->name, name);
+  dp->dir_text = text;
+  dp->allnew = 0;
+}
+
+void
+read_dir_file ()
+{
+  int dev;
+  int ino;
+  char *strp;
+  FILE *fp;
+  char buf[512];
+  static char *path = 0;
+
+  if (path == 0)
+    path = ck_malloc (PATH_MAX);
+  time (&this_time);
+  if (gnu_dumpfile[0] != '/')
+    {
+#if defined(__MSDOS__) || defined(HAVE_GETCWD) || defined(_POSIX_VERSION)
+      if (!getcwd (path, PATH_MAX))
+	{
+	  msg ("Couldn't get current directory.");
+	  exit (EX_SYSTEM);
+	}
+#else
+      char *getwd ();
+
+      if (!getwd (path))
+	{
+	  msg ("Couldn't get current directory: %s", path);
+	  exit (EX_SYSTEM);
+	}
+#endif
+      /* If this doesn't fit, we're in serious trouble */
+      strcat (path, "/");
+      strcat (path, gnu_dumpfile);
+      gnu_dumpfile = path;
+    }
+  fp = fopen (gnu_dumpfile, "r");
+  if (fp == 0 && errno != ENOENT)
+    {
+      msg_perror ("Can't open %s", gnu_dumpfile);
+      return;
+    }
+  if (!fp)
+    return;
+  fgets (buf, sizeof (buf), fp);
+  if (!f_new_files)
+    {
+      f_new_files++;
+      new_time = atol (buf);
+    }
+  while (fgets (buf, sizeof (buf), fp))
+    {
+      strp = &buf[strlen (buf)];
+      if (strp[-1] == '\n')
+	strp[-1] = '\0';
+      strp = buf;
+      dev = atol (strp);
+      while (isdigit (*strp))
+	strp++;
+      ino = atol (strp);
+      while (isspace (*strp))
+	strp++;
+      while (isdigit (*strp))
+	strp++;
+      strp++;
+      add_dir (un_quote_string (strp), dev, ino, (char *) 0);
+    }
+  fclose (fp);
+}
+
+void
+write_dir_file ()
+{
+  FILE *fp;
+  struct dirname *dp;
+  char *str;
+  extern char *quote_copy_string ();
+
+  fp = fopen (gnu_dumpfile, "w");
+  if (fp == 0)
+    {
+      msg_perror ("Can't write to %s", gnu_dumpfile);
+      return;
+    }
+  fprintf (fp, "%lu\n", this_time);
+  for (dp = dir_list; dp; dp = dp->next)
+    {
+      if (!dp->dir_text)
+	continue;
+      str = quote_copy_string (dp->name);
+      if (str)
+	{
+	  fprintf (fp, "%u %u %s\n", dp->dev, dp->ino, str);
+	  free (str);
+	}
+      else
+	fprintf (fp, "%u %u %s\n", dp->dev, dp->ino, dp->name);
+    }
+  fclose (fp);
+}
+
+struct dirname *
+get_dir (name)
+     char *name;
+{
+  struct dirname *dp;
+
+  for (dp = dir_list; dp; dp = dp->next)
+    {
+      if (!strcmp (dp->name, name))
+	return dp;
+    }
+  return 0;
+}
+
+
+/* Collect all the names from argv[] (or whatever), then expand them into
+   a directory tree, and put all the directories at the beginning. */
+void
+collect_and_sort_names ()
+{
+  struct name *n, *n_next;
+  int num_names;
+  struct stat statbuf;
+  int name_cmp ();
+  char *merge_sort ();
+
+  name_gather ();
+
+  if (gnu_dumpfile)
+    read_dir_file ();
+  if (!namelist)
+    addname (".");
+  for (n = namelist; n; n = n_next)
+    {
+      n_next = n->next;
+      if (n->found || n->dir_contents)
+	continue;
+      if (n->regexp)		/* FIXME just skip regexps for now */
+	continue;
+      if (n->change_dir)
+	if (chdir (n->change_dir) < 0)
+	  {
+	    msg_perror ("can't chdir to %s", n->change_dir);
+	    continue;
+	  }
+
+#ifdef AIX
+      if (statx (n->name, &statbuf, STATSIZE, STX_HIDDEN | STX_LINK))
+#else
+      if (lstat (n->name, &statbuf) < 0)
+#endif /* AIX */
+	{
+	  msg_perror ("can't stat %s", n->name);
+	  continue;
+	}
+      if (S_ISDIR (statbuf.st_mode))
+	{
+	  n->found++;
+	  add_dir_name (n->name, statbuf.st_dev);
+	}
+    }
+
+  num_names = 0;
+  for (n = namelist; n; n = n->next)
+    num_names++;
+  namelist = (struct name *) merge_sort ((PTR) namelist, num_names, (char *) (&(namelist->next)) - (char *) namelist, name_cmp);
+
+  for (n = namelist; n; n = n->next)
+    {
+      n->found = 0;
+    }
+  if (gnu_dumpfile)
+    write_dir_file ();
+}
+
+int
+name_cmp (n1, n2)
+     struct name *n1, *n2;
+{
+  if (n1->found)
+    {
+      if (n2->found)
+	return strcmp (n1->name, n2->name);
+      else
+	return -1;
+    }
+  else if (n2->found)
+    return 1;
+  else
+    return strcmp (n1->name, n2->name);
+}
+
+int
+dirent_cmp (p1, p2)
+     const PTR p1;
+     const PTR p2;
+{
+  char *frst, *scnd;
+
+  frst = (*(char **) p1) + 1;
+  scnd = (*(char **) p2) + 1;
+
+  return strcmp (frst, scnd);
+}
+
+char *
+get_dir_contents (p, device)
+     char *p;
+     int device;
+{
+  DIR *dirp;
+  register struct dirent *d;
+  char *new_buf;
+  char *namebuf;
+  int bufsiz;
+  int len;
+  PTR the_buffer;
+  char *buf;
+  size_t n_strs;
+  /*	int n_size;*/
+  char *p_buf;
+  char **vec, **p_vec;
+
+  extern int errno;
+
+  errno = 0;
+  dirp = opendir (p);
+  bufsiz = strlen (p) + NAMSIZ;
+  namebuf = ck_malloc (bufsiz + 2);
+  if (!dirp)
+    {
+      if (errno)
+	msg_perror ("can't open directory %s", p);
+      else
+	msg ("error opening directory %s", p);
+      new_buf = NULL;
+    }
+  else
+    {
+      struct dirname *dp;
+      int all_children;
+
+      dp = get_dir (p);
+      all_children = dp ? dp->allnew : 0;
+      (void) strcpy (namebuf, p);
+      if (p[strlen (p) - 1] != '/')
+	(void) strcat (namebuf, "/");
+      len = strlen (namebuf);
+
+      the_buffer = init_buffer ();
+      while (d = readdir (dirp))
+	{
+	  struct stat hs;
+
+	  /* Skip . and .. */
+	  if (is_dot_or_dotdot (d->d_name))
+	    continue;
+	  if (NLENGTH (d) + len >= bufsiz)
+	    {
+	      bufsiz += NAMSIZ;
+	      namebuf = ck_realloc (namebuf, bufsiz + 2);
+	    }
+	  (void) strcpy (namebuf + len, d->d_name);
+#ifdef AIX
+	  if (0 != f_follow_links ?
+	      statx (namebuf, &hs, STATSIZE, STX_HIDDEN) :
+	      statx (namebuf, &hs, STATSIZE, STX_HIDDEN | STX_LINK))
+#else
+	  if (0 != f_follow_links ? stat (namebuf, &hs) : lstat (namebuf, &hs))
+#endif
+	    {
+	      msg_perror ("can't stat %s", namebuf);
+	      continue;
+	    }
+	  if ((f_local_filesys && device != hs.st_dev)
+	      || (f_exclude && check_exclude (namebuf)))
+	    add_buffer (the_buffer, "N", 1);
+#ifdef AIX
+	  else if (S_ISHIDDEN (hs.st_mode))
+	    {
+	      add_buffer (the_buffer, "D", 1);
+	      strcat (d->d_name, "A");
+	      d->d_namlen++;
+	    }
+#endif /* AIX */
+	  else if (S_ISDIR (hs.st_mode))
+	    {
+	      if (dp = get_dir (namebuf))
+		{
+		  if (dp->dev != hs.st_dev
+		      || dp->ino != hs.st_ino)
+		    {
+		      if (f_verbose)
+			msg ("directory %s has been renamed.", namebuf);
+		      dp->allnew = 1;
+		      dp->dev = hs.st_dev;
+		      dp->ino = hs.st_ino;
+		    }
+		  dp->dir_text = "";
+		}
+	      else
+		{
+		  if (f_verbose)
+		    msg ("Directory %s is new", namebuf);
+		  add_dir (namebuf, hs.st_dev, hs.st_ino, "");
+		  dp = get_dir (namebuf);
+		  dp->allnew = 1;
+		}
+	      if (all_children)
+		dp->allnew = 1;
+
+	      add_buffer (the_buffer, "D", 1);
+	    }
+	  else if (!all_children
+		   && f_new_files
+		   && new_time > hs.st_mtime
+		   && (f_new_files > 1
+		       || new_time > hs.st_ctime))
+	    add_buffer (the_buffer, "N", 1);
+	  else
+	    add_buffer (the_buffer, "Y", 1);
+	  add_buffer (the_buffer, d->d_name, (int) (NLENGTH (d) + 1));
+	}
+      add_buffer (the_buffer, "\000\000", 2);
+      closedir (dirp);
+
+      /* Well, we've read in the contents of the dir, now sort them */
+      buf = get_buffer (the_buffer);
+      if (buf[0] == '\0')
+	{
+	  flush_buffer (the_buffer);
+	  new_buf = NULL;
+	}
+      else
+	{
+	  n_strs = 0;
+	  for (p_buf = buf; *p_buf;)
+	    {
+	      int tmp;
+
+	      tmp = strlen (p_buf) + 1;
+	      n_strs++;
+	      p_buf += tmp;
+	    }
+	  vec = (char **) ck_malloc (sizeof (char *) * (n_strs + 1));
+	  for (p_vec = vec, p_buf = buf; *p_buf; p_buf += strlen (p_buf) + 1)
+	    *p_vec++ = p_buf;
+	  *p_vec = 0;
+	  qsort ((PTR) vec, n_strs, sizeof (char *), dirent_cmp);
+	  new_buf = (char *) ck_malloc (p_buf - buf + 2);
+	  for (p_vec = vec, p_buf = new_buf; *p_vec; p_vec++)
+	    {
+	      char *p_tmp;
+
+	      for (p_tmp = *p_vec; *p_buf++ = *p_tmp++;)
+		;
+	    }
+	  *p_buf++ = '\0';
+	  free (vec);
+	  flush_buffer (the_buffer);
+	}
+    }
+  free (namebuf);
+  return new_buf;
+}
+
+/* p is a directory.  Add all the files in P to the namelist.  If any of the
+   files is a directory, recurse on the subdirectory. . . */
+static void
+add_dir_name (p, device)
+     char *p;
+     int device;
+{
+  char *new_buf;
+  char *p_buf;
+
+  char *namebuf;
+  int buflen;
+  register int len;
+  int sublen;
+
+  /*	PTR the_buffer;*/
+
+  /*	char *buf;*/
+  /*	char **vec,**p_vec;*/
+  /*	int n_strs,n_size;*/
+
+  struct name *n;
+
+  int dirent_cmp ();
+
+  new_buf = get_dir_contents (p, device);
+
+  for (n = namelist; n; n = n->next)
+    {
+      if (!strcmp (n->name, p))
+	{
+	  n->dir_contents = new_buf ? new_buf : "\0\0\0\0";
+	  break;
+	}
+    }
+
+  if (new_buf)
+    {
+      len = strlen (p);
+      buflen = NAMSIZ <= len ? len + NAMSIZ : NAMSIZ;
+      namebuf = ck_malloc (buflen + 1);
+
+      (void) strcpy (namebuf, p);
+      if (namebuf[len - 1] != '/')
+	{
+	  namebuf[len++] = '/';
+	  namebuf[len] = '\0';
+	}
+      for (p_buf = new_buf; *p_buf; p_buf += sublen + 1)
+	{
+	  sublen = strlen (p_buf);
+	  if (*p_buf == 'D')
+	    {
+	      if (len + sublen >= buflen)
+		{
+		  buflen += NAMSIZ;
+		  namebuf = ck_realloc (namebuf, buflen + 1);
+		}
+	      (void) strcpy (namebuf + len, p_buf + 1);
+	      addname (namebuf);
+	      add_dir_name (namebuf, device);
+	    }
+	}
+      free (namebuf);
+    }
+}
+
+/* Returns non-zero if p is . or ..   This could be a macro for speed. */
+int
+is_dot_or_dotdot (p)
+     char *p;
+{
+  return (p[0] == '.' && (p[1] == '\0' || (p[1] == '.' && p[2] == '\0')));
+}
+
+
+
+
+
+
+void
+gnu_restore (skipcrud)
+     int skipcrud;
+{
+  char *current_dir;
+  /*	int current_dir_length; */
+
+  char *archive_dir;
+  /*	int archive_dir_length; */
+  PTR the_buffer;
+  char *p;
+  DIR *dirp;
+  struct dirent *d;
+  char *cur, *arc;
+  extern struct stat hstat;	/* Stat struct corresponding */
+  long size, copied;
+  char *from, *to;
+  extern union record *head;
+
+  dirp = opendir (skipcrud + current_file_name);
+
+  if (!dirp)
+    {
+      /* The directory doesn't exist now.  It'll be created.
+			   In any case, we don't have to delete any files out
+			   of it */
+      skip_file ((long) hstat.st_size);
+      return;
+    }
+
+  the_buffer = init_buffer ();
+  while (d = readdir (dirp))
+    {
+      if (is_dot_or_dotdot (d->d_name))
+	continue;
+
+      add_buffer (the_buffer, d->d_name, (int) (NLENGTH (d) + 1));
+    }
+  closedir (dirp);
+  add_buffer (the_buffer, "", 1);
+
+  current_dir = get_buffer (the_buffer);
+  archive_dir = (char *) ck_malloc (hstat.st_size);
+  if (archive_dir == 0)
+    {
+      msg ("Can't allocate %d bytes for restore", hstat.st_size);
+      skip_file ((long) hstat.st_size);
+      return;
+    }
+  to = archive_dir;
+  for (size = hstat.st_size; size > 0; size -= copied)
+    {
+      from = findrec ()->charptr;
+      if (!from)
+	{
+	  msg ("Unexpected EOF in archive\n");
+	  break;
+	}
+      copied = endofrecs ()->charptr - from;
+      if (copied > size)
+	copied = size;
+      bcopy ((PTR) from, (PTR) to, (int) copied);
+      to += copied;
+      userec ((union record *) (from + copied - 1));
+    }
+
+  for (cur = current_dir; *cur; cur += strlen (cur) + 1)
+    {
+      for (arc = archive_dir; *arc; arc += strlen (arc) + 1)
+	{
+	  arc++;
+	  if (!strcmp (arc, cur))
+	    break;
+	}
+      if (*arc == '\0')
+	{
+	  p = new_name (skipcrud + current_file_name, cur);
+	  if (f_confirm && !confirm ("delete", p))
+	    {
+	      free (p);
+	      continue;
+	    }
+	  if (f_verbose)
+	    fprintf (msg_file, "%s: deleting %s\n", tar, p);
+	  if (recursively_delete (p))
+	    {
+	      msg ("%s: Error while deleting %s\n", tar, p);
+	    }
+	  free (p);
+	}
+
+    }
+  flush_buffer (the_buffer);
+  free (archive_dir);
+}
+
+int
+recursively_delete (path)
+     char *path;
+{
+  struct stat sbuf;
+  DIR *dirp;
+  struct dirent *dp;
+  char *path_buf;
+  /* int path_len; */
+
+
+  if (lstat (path, &sbuf) < 0)
+    return 1;
+  if (S_ISDIR (sbuf.st_mode))
+    {
+
+      /* path_len=strlen(path); */
+      dirp = opendir (path);
+      if (dirp == 0)
+	return 1;
+      while (dp = readdir (dirp))
+	{
+	  if (is_dot_or_dotdot (dp->d_name))
+	    continue;
+	  path_buf = new_name (path, dp->d_name);
+	  if (recursively_delete (path_buf))
+	    {
+	      free (path_buf);
+	      closedir (dirp);
+	      return 1;
+	    }
+	  free (path_buf);
+	}
+      closedir (dirp);
+
+      if (rmdir (path) < 0)
+	return 1;
+      return 0;
+    }
+  if (unlink (path) < 0)
+    return 1;
+  return 0;
+}