Usenet 1993 July/InfoMagic USENET CD-ROM July 1993.ISO/sources/misc/volume17/delete/part03

Internet Message Format | 1991-02-25 | 31.8 KB

From: [e-mail] (Jonathan I. Kamens)
Newsgroups: comp.sources.misc
Subject: v17i025:  delete - MIT Athena delete/undelete programs, Part03/04
Message-ID: <[e-mail]>
Date: 25 Feb 91 18:07:45 GMT
Approved: [e-mail]
X-Checksum-Snefru: 4d4519fb fb8b274b 79427acf e56367e9

Submitted-by: Jonathan I. Kamens <[e-mail]>
Posting-number: Volume 17, Issue 25
Archive-name: delete/part03

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#        "End of archive 3 (of 4)."
# Contents:  delete.c directories.c
# Wrapped by jik@pit-manager on Fri Feb 22 08:14:26 1991
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'delete.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'delete.c'\"
else
echo shar: Extracting \"'delete.c'\" \(13684 characters\)
sed "s/^X//" >'delete.c' <<'END_OF_FILE'
X/*
X * $Source: /afs/athena.mit.edu/astaff/project/delete/src/RCS/delete.c,v $
X * $Author: jik $
X *
X * This program is a replacement for rm.  Instead of actually deleting
X * files, it marks them for deletion by prefixing them with a ".#"
X * prefix.
X *
X * Copyright (c) 1989 by the Massachusetts Institute of Technology.
X * For copying and distribution information, see the file "mit-copyright.h."
X */
X
X#if (!defined(lint) && !defined(SABER))
X     static char rcsid_delete_c[] = "$Header: /afs/athena.mit.edu/astaff/project/delete/src/RCS/delete.c,v 1.24 91/02/20 17:24:51 jik Exp $";
X#endif
X
X#include <sys/types.h>
X#include <stdio.h>
X#include <sys/dir.h>
X#ifdef SYSV
X#include <string.h>
X#define index strchr
X#define rindex strrchr
X#else
X#include <strings.h>
X#endif /* SYSV */
X#include <sys/param.h>
X#include <sys/file.h>
X#include <errno.h>
X#include "errors.h"
X#include "delete_errs.h"
X#include "util.h"
X#include "delete.h"
X#include "mit-copyright.h"
X
X
X
X/*
X * ALGORITHM:
X *
X * 1. Parse command-line arguments and set flags.
X * 2. Call the function delete() for each filename command-line argument.
X *
X * delete():
X *
X * 1. Can the file be lstat'd?
X *    no -- abort
X *    yes -- continue
X * 2. Is the file a directory?
X *    yes -- is it a dotfile?
X *           yes -- abort
X *           no -- continue
X *        -- is the filesonly option set?
X *           yes -- is the recursive option specified?
X *                  yes -- continue
X *                  no -- abort
X *           no -- is the directory empty?
X *                  yes -- remove it
X *                  no -- is the directoriesonly option set?
X *               yes -- abort
X *               no -- continue
X *                -- is the recursive option specified?
X *               yes -- continue
X *               no -- abort
X *    no -- is the directoriesonly option set?
X *         yes -- abort
X *         no -- continue
X * 3. If the file is a file, remove it.
X * 4. If the file is a directory, open it and pass each of its members
X *    (excluding . files) to delete().
X */
X
X
Xint force, interactive, recursive, noop, verbose, filesonly, directoriesonly;
Xint emulate_rm, linked_to_rm, linked_to_rmdir;
Xextern int errno;
X
Xmain(argc, argv)
Xint argc;
Xchar *argv[];
X{
X     extern char *optarg;
X     extern int optind;
X     int arg;
X
X     whoami = lastpart(argv[0]);
X
X     initialize_del_error_table();
X
X     force = interactive = recursive = noop = verbose = filesonly =
X      directoriesonly = emulate_rm = linked_to_rm = linked_to_rmdir = 0;
X
X     if (!strcmp(whoami, "rm"))
X      emulate_rm++, filesonly++, linked_to_rm++;
X     if (!strcmp(whoami, "rmdir") || !strcmp(whoami, "rd"))
X      emulate_rm++, directoriesonly++, linked_to_rmdir++;
X
X     while ((arg = getopt(argc, argv, "efirnvFD")) != -1) {
X      switch (arg) {
X      case 'r':
X           recursive++;
X           if (directoriesonly) {
X                    fprintf(stderr, "%s: -r and -D are mutually exclusive.\n",
X                            whoami);
X                    usage();
X            exit(1);
X           }
X           break;
X      case 'f':
X           force++;
X           break;
X      case 'i':
X           interactive++;
X           break;
X      case 'n':
X           noop++;
X           break;
X      case 'v':
X           verbose++;
X           break;
X      case 'e':
X           emulate_rm++;
X           break;
X      case 'F':
X           filesonly++;
X           if (directoriesonly) {
X            fprintf(stderr, "%s: -F and -D are mutually exclusive.\n",
X                            whoami);
X                    usage();
X            exit(1);
X           }
X           break;
X      case 'D':
X           directoriesonly++;
X           if (recursive) {
X                    fprintf(stderr, "%s: -r and -D are mutually exclusive.\n",
X                            whoami);
X                    usage();
X            exit(1);
X           }
X           if (filesonly) {
X                    fprintf(stderr, "%s: -F and -D are mutually exclusive.\n",
X                            whoami);
X                    usage();
X            exit(1);
X           }
X           break;
X      default:
X           usage();
X           exit(1);
X      }
X     }
X     report_errors = ! (force || emulate_rm);
X
X     if (optind == argc) {
X      if (! force) {
X           fprintf(stderr, "%s: no files specified.\n", whoami);
X           usage();
X      }
X      exit(force ? 0 : 1);
X     }
X     while (optind < argc) {
X      if (delete(argv[optind], 0))
X           error(argv[optind]);
X      optind++;
X     }
X     exit(((! force) && error_occurred) ? 1 : 0);
X}
X
X
X
Xusage()
X{
X     printf("Usage: %s [ options ] filename ...\n", whoami);
X     printf("Options are:\n");
X     if (! linked_to_rmdir)
X      printf("     -r     recursive\n");
X     printf("     -i     interactive\n");
X     printf("     -f     force\n");
X     printf("     -n     noop\n");
X     printf("     -v     verbose\n");
X     if (! (linked_to_rmdir || linked_to_rm)) {
X      printf("     -e     emulate rm/rmdir\n");
X      printf("     -F     files only\n");
X      printf("     -D     directories only\n");
X     }
X     printf("     --     end options and start filenames\n");
X     if (! (linked_to_rmdir || linked_to_rm)) {
X      printf("-r and -D are mutually exclusive\n");
X      printf("-F and -D are mutually exclusive\n");
X     }
X}
X
X
X
X
Xdelete(filename, recursed)
Xchar *filename;
Xint recursed;
X{
X     struct stat stat_buf;
X     int retval;
X
X     /* can the file be lstat'd? */
X     if (lstat(filename, &stat_buf) == -1) {
X      set_error(errno);
X      if (emulate_rm && (! force))
X           fprintf(stderr, "%s: %s nonexistent\n", whoami, filename);
X      error(filename);
X      return error_code;
X     }
X
X     /* is the file a directory? */
X     if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) {
X      /* is the file a dot file? */
X      if (is_dotfile(lastpart(filename))) {
X           set_error(DELETE_IS_DOTFILE);
X           if (emulate_rm && (! force))
X            fprintf(stderr, "%s: cannot remove `.' or `..'\n", whoami);
X           error(filename);
X           return error_code;
X      }
X
X      /* is the filesonly option set? */
X      if (filesonly) {
X           /* is the recursive option specified? */
X           if (recursive) {
X            if (retval = recursive_delete(filename, stat_buf,
X                          recursed)) {
X             error(filename);
X             return retval;
X            }
X           }
X           else {
X            if (emulate_rm && (! force))
X             fprintf(stderr, "%s: %s directory\n", whoami,
X                 filename);
X            set_error(DELETE_CANT_DEL_DIR);
X            error(filename);
X            return error_code;
X           }
X      }
X      else {
X           /* is the directory empty? */
X           if ((retval = empty_directory(filename)) < 0) {
X            error(filename);
X            if (! emulate_rm)
X             return error_code;
X           }
X
X           if (retval > 0) {
X            /* remove it */
X            if (retval = do_move(filename, stat_buf, 0)) {
X             error(filename);
X             return error_code;
X            }
X           }
X           else {
X            /* is the directoriesonly option set? */
X            if (directoriesonly) {
X             if (emulate_rm && (! force))
X                  fprintf(stderr, "%s: %s: Directory not empty\n",
X                      whoami, filename);
X             set_error(DELETE_DIR_NOT_EMPTY);
X             error(filename);
X             return error_code;
X            }
X            else {
X             /* is the recursive option specified? */
X             if (recursive) {
X                  if (retval = recursive_delete(filename, stat_buf,
X                                recursed)) {
X                   error(filename);
X                   return error_code;
X                  }
X             }
X             else {
X                  if (emulate_rm && (! force))
X                   fprintf(stderr, "%s: %s not empty\n",
X                       whoami, filename);
X                  set_error(DELETE_DIR_NOT_EMPTY);
X                  error(filename);
X                  return error_code;
X             }
X            }
X           }
X      }
X     }
X     else {
X      /* is the directoriesonly option set? */
X      if (directoriesonly) {
X           if (emulate_rm && (! force))
X            fprintf(stderr, "%s: %s: Not a directory\n", whoami,
X                filename);
X           set_error(DELETE_CANT_DEL_FILE);
X           error(filename);
X           return error_code;
X      }
X      else {
X           if (retval = do_move(filename, stat_buf, 0)) {
X            error(filename);
X            return error_code;
X           }
X      }
X     }
X     return 0;
X}
X
X
X
X
X
Xempty_directory(filename)
Xchar *filename;
X{
X     DIR *dirp;
X     struct direct *dp;
X
X     dirp = Opendir(filename);
X     if (! dirp) {
X      set_error(errno);
X      error(filename);
X      return -1;
X     }
X     for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
X      if (is_dotfile(dp->d_name))
X           continue;
X      if (is_deleted(dp->d_name))
X           continue;
X      else {
X           closedir(dirp);
X           return 0;
X      }
X     }
X     closedir(dirp);
X     return 1;
X}
X
X
X
X
Xrecursive_delete(filename, stat_buf, recursed)
Xchar *filename;
Xstruct stat stat_buf;
Xint recursed;
X{
X     DIR *dirp;
X     struct direct *dp;
X     int status = 0;
X     char newfile[MAXPATHLEN];
X     int retval = 0;
X
X     if (interactive && recursed) {
X      printf("%s: remove directory %s? ", whoami, filename);
X      if (! yes()) {
X           set_status(DELETE_NOT_DELETED);
X           return error_code;
X      }
X     }
X     dirp = Opendir(filename);
X     if (! dirp) {
X      if (emulate_rm && (! force))
X           fprintf(stderr, "%s: %s not changed\n", whoami, filename);
X      set_error(errno);
X      error(filename);
X      return error_code;
X     }
X     for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
X      if (is_dotfile(dp->d_name))
X           continue;
X      if (is_deleted(dp->d_name))
X           continue;
X      else {
X           (void) strcpy(newfile, append(filename, dp->d_name));
X           if (! *newfile) {
X            error(filename);
X            status = error_code;
X           }
X
X           retval = delete(newfile, 1);
X           if (retval) {
X            error(newfile);
X            status = retval;
X           }
X      }
X     }
X     closedir(dirp);
X
X     if (status && (! emulate_rm)) {
X      set_warning(DELETE_DIR_NOT_EMPTY);
X      error(filename);
X     }
X     else
X      retval = do_move(filename, stat_buf, status);
X
X     if (retval)
X      status = retval;
X
X     return status;
X}
X
X
X
X
X
X
Xdo_move(filename, stat_buf, subs_not_deleted)
Xchar *filename;
Xstruct stat stat_buf;
Xint subs_not_deleted; /* If the file in question is a directory, and  */
X              /* there is something underneath it that hasn't */
X              /* been removed, this will be set to true.      */
X                      /* The program asks if the user wants to delete */
X              /* the directory, and if the user says yes,     */
X              /* checks the value of subs_not_deleted.  If    */
X              /* it's true, an error results.                 */
X                      /* This is used only when emulating rm.         */
X{
X     char *last;
X     char buf[MAXPATHLEN];
X     char name[MAXNAMLEN];
X     struct stat deleted_buf;
X
X     (void) strncpy(buf, filename, MAXPATHLEN);
X     last = lastpart(buf);
X     if (strlen(last) > MAXNAMLEN) {
X      if (emulate_rm && (! force))
X           fprintf(stderr, "%s: %s: filename too long\n", whoami,
X               filename);
X      set_error(ENAMETOOLONG);
X      error(filename);
X      return error_code;
X     }
X     (void) strcpy(name, last);
X     if (strlen(buf) + 3 > MAXPATHLEN) {
X      if (emulate_rm && (! force))
X           fprintf(stderr, "%s: %s: pathname too long\n", whoami,
X               filename);
X      set_error(ENAMETOOLONG);
X      error(filename);
X      return error_code;
X     }
X     *last = '\0';
X     (void) strcat(buf, ".#");
X     (void) strcat(buf, name);
X     if (interactive) {
X      printf("%s: remove %s? ", whoami, filename);
X      if (! yes()) {
X           set_status(DELETE_NOT_DELETED);
X           return error_code;
X      }
X     }
X     else if ((! force)
X#ifdef S_IFLNK
X          && ((stat_buf.st_mode & S_IFMT) != S_IFLNK)
X#endif
X          && access(filename, W_OK)) {
X      if (emulate_rm)
X           printf("%s: override protection %o for %s? ", whoami,
X              stat_buf.st_mode & 0777, filename);
X      else
X           printf("%s: File %s not writeable.  Delete anyway? ", whoami,
X              filename);
X      if (! yes()) {
X           set_status(DELETE_NOT_DELETED);
X           return error_code;
X      }
X     }
X     if (emulate_rm && subs_not_deleted) {
X      if (! force)
X           fprintf(stderr, "%s: %s not removed\n", whoami, filename);
X      return 1;
X     }
X     if (noop) {
X      fprintf(stderr, "%s: %s would be removed\n", whoami, filename);
X      return 0;
X     }
X     if ((! lstat(buf, &deleted_buf)) && unlink_completely(buf)) {
X      if (emulate_rm && (! force))
X           fprintf(stderr, "%s: %s not removed\n", whoami, filename);
X      error(filename);
X      return error_code;
X     }
X     if (rename(filename, buf)) {
X      if (emulate_rm && (! force))
X           fprintf(stderr, "%s: %s not removed\n", whoami, filename);
X      set_error(errno);
X      error(filename);
X      return error_code;
X     }
X     else {
X      if (verbose)
X           fprintf(stderr, "%s: %s removed\n", whoami, filename);
X      return 0;
X     }
X}
X
X
X
Xunlink_completely(filename)
Xchar *filename;
X{
X     char buf[MAXPATHLEN];
X     struct stat stat_buf;
X     DIR *dirp;
X     struct direct *dp;
X     int status = 0;
X     int retval;
X
X     if (lstat(filename, &stat_buf)) {
X      set_error(errno);
X      error(filename);
X      return error_code;
X     }
X
X     if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) {
X      dirp = Opendir(filename);
X      if (! dirp) {
X           set_error(errno);
X           error(filename);
X           return error_code;
X      }
X
X      for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
X           if (is_dotfile(dp->d_name))
X            continue;
X           (void) strcpy(buf, append(filename, dp->d_name));
X           if (! *buf) {
X            status = error_code;
X            error(filename);
X            continue;
X           }
X           retval = unlink_completely(buf);
X           if (retval) {
X            status = retval;
X            error(filename);
X           }
X      }
X      closedir(dirp);
X
X      if (status)
X           return status;
X
X      retval = rmdir(filename);
X      if (retval) {
X           set_error(errno);
X           error(filename);
X           return errno;
X      }
X     }
X     else {
X      retval = unlink(filename);
X      if (retval) {
X           set_error(errno);
X           error(filename);
X           return error_code;
X      }
X      else
X           return 0;
X     }
X     return 0;
X}
END_OF_FILE
if test 13684 -ne `wc -c <'delete.c'`; then
    echo shar: \"'delete.c'\" unpacked with wrong size!
fi
# end of 'delete.c'
fi
if test -f 'directories.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'directories.c'\"
else
echo shar: Extracting \"'directories.c'\" \(15169 characters\)
sed "s/^X//" >'directories.c' <<'END_OF_FILE'
X/*
X * $Source: /afs/athena.mit.edu/user/j/jik/delete/src/RCS/directories.c,v $
X * $Author: jik $
X *
X * This program is part of a package including delete, undelete,
X * lsdel, expunge and purge.  The software suite is meant as a
X * replacement for rm which allows for file recovery.
X *
X * Copyright (c) 1989 by the Massachusetts Institute of Technology.
X * For copying and distribution information, see the file "mit-copyright.h."
X */
X
X#if !defined(lint) && !defined(SABER)
X     static char rcsid_directories_c[] = "$Header: /afs/athena.mit.edu/user/j/jik/delete/src/RCS/directories.c,v 1.18 91/02/22 06:32:25 jik Exp $";
X#endif
X
X#include <stdio.h>
X#include <sys/types.h>
X#include <sys/param.h>
X#include <sys/dir.h>
X#ifdef SYSV
X#include <string.h>
X#define index strchr
X#define rindex strrchr
X#else
X#include <strings.h>
X#endif /* SYSV */
X#include <errno.h>
X#include <com_err.h>
X#include "delete_errs.h"
X#include "util.h"
X#include "directories.h"
X#include "mit-copyright.h"
X#include "errors.h"
X
Xextern char *realloc();
Xextern long time();
Xextern int errno;
X
Xstatic filerec root_tree;
Xstatic filerec cwd_tree;
X
Xvoid free_leaf();
X
X /* These are not static because external routines need to be able to */
X /* access them.                               */
Xtime_t current_time;
X
X
Xstatic filerec default_cwd = {
X     "",
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     False,
X     False,
X     {0}
X};
X
Xstatic filerec default_root = {
X     "/",
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     False,
X     False,
X     {0}
X};
X
Xstatic filerec default_directory = {
X     "",
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     False,
X     False,
X     {0}
X};
X
Xstatic filerec default_file = {
X     "",
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     (filerec *) NULL,
X     False,
X     False,
X     {0}
X};
X
X
Xfilerec *get_root_tree()
X{
X     return(&root_tree);
X}
X
X
X
Xfilerec *get_cwd_tree()
X{
X     return(&cwd_tree);
X}
X
X
Xint initialize_tree()
X{
X     int retval;
X
X     root_tree = default_root;
X     cwd_tree = default_cwd;
X
X     current_time = time((time_t *)0);
X     if (retval = get_specs(".", &cwd_tree.specs, FOLLOW_LINKS)) {
X      error("get_specs on .");
X      return retval;
X     }
X     if (retval = get_specs("/", &root_tree.specs, FOLLOW_LINKS)) {
X      error("get_specs on /");
X      return retval;
X     }
X     return 0;
X}
X
X
Xint add_path_to_tree(path, leaf)
Xchar *path;
Xfilerec **leaf;
X{
X     filerec *parent;
X     char next_name[MAXNAMLEN];
X     char lpath[MAXPATHLEN], built_path[MAXPATHLEN], *ptr;
X     struct mystat specs;
X     int retval;
X
X     if (retval = get_specs(path, &specs, DONT_FOLLOW_LINKS)) {
X      char error_buf[MAXPATHLEN+14];
X
X      (void) sprintf(error_buf, "get_specs on %s", path);
X      error(error_buf);
X      return retval;
X     }
X
X     (void) strcpy(lpath, path); /* we don't want to damage the user's */
X                 /* string */
X     ptr = lpath;
X     if (*ptr == '/') {
X      parent = &root_tree;
X      ptr++;
X      (void) strcpy(built_path, "/");
X     }
X     else if (! strncmp(ptr, "./", 2)) {
X      parent = &cwd_tree;
X      ptr += 2;
X      *built_path = '\0';
X     }
X     else {
X      parent = &cwd_tree;
X      *built_path = '\0';
X     }
X
X     (void) strcpy(next_name, firstpart(ptr, ptr));
X     while (*ptr) {
X      (void) strcat(built_path, next_name);
X      if (retval = add_directory_to_parent(parent, next_name, False,
X                           &parent)) {
X           error("add_directory_to_parent");
X           return retval;
X      }
X      (void) strcpy(next_name, firstpart(ptr, ptr));
X      if (retval = get_specs(built_path, &parent->specs, FOLLOW_LINKS)) {
X           char error_buf[MAXPATHLEN+14];
X
X           (void) sprintf(error_buf, "get_specs on %s", built_path);
X           error(error_buf);
X           return retval;
X      }
X      (void) strcat(built_path, "/");
X     }
X     if ((specs.st_mode & S_IFMT) == S_IFDIR) {
X      retval = add_directory_to_parent(parent, next_name, True, leaf);
X      if (retval) {
X           error("add_directory_to_parent");
X           return retval;
X      }
X     }
X     else {
X      retval = add_file_to_parent(parent, next_name, True, leaf);
X      if (retval) {
X           error("add_file_to_parent");
X           return retval;
X      }
X     }
X
X     (*leaf)->specs = specs;
X
X     return 0;
X}
X
X
X
Xint get_specs(path, specs, follow)
Xchar *path;
Xstruct mystat *specs;
Xint follow; /* follow symlinks or not? */
X{
X     int status;
X     struct stat realspecs;
X
X     if (strlen(path)) if ((path[strlen(path) - 1] == '/') &&
X               (strlen(path) != 1))
X      path[strlen(path) - 1] = '\0';
X     if (follow == FOLLOW_LINKS)
X      status = stat(path, &realspecs);
X     else
X      status = lstat(path, &realspecs);
X
X     if (status) {
X      set_error(errno);
X      error(path);
X      return error_code;
X     }
X
X     specs->st_dev = realspecs.st_dev;
X     specs->st_ino = realspecs.st_ino;
X     specs->st_mode = realspecs.st_mode;
X     specs->st_size = realspecs.st_size;
X     specs->st_ctime = realspecs.st_ctime;
X#ifdef notdef
X     /*
X      * See comment in directories.h to understand why this is
X      * disabled.
X      */
X     specs->st_blocks = realspecs.st_blocks;
X#endif
X
X     return 0;
X}
X
X
X
Xfilerec *next_leaf(leaf)
Xfilerec *leaf;
X{
X     filerec *new;
X
X     if ((leaf->specs.st_mode & S_IFMT) == S_IFDIR) {
X      new = first_in_directory(leaf);
X      if (new)
X           return(new);
X      new = next_directory(leaf);
X      return(new);
X     }
X     else {
X      new = next_in_directory(leaf);
X      return(new);
X     }
X}
X
X
Xfilerec *next_specified_leaf(leaf)
Xfilerec *leaf;
X{
X     while (leaf = next_leaf(leaf))
X     if (leaf->specified)
X      return(leaf);
X     return((filerec *) NULL);
X}
X
X
Xfilerec *next_directory(leaf)
Xfilerec *leaf;
X{
X     filerec *ret;
X     if ((leaf->specs.st_mode & S_IFMT) != S_IFDIR)
X      leaf = leaf->parent;
X     if (leaf)
X      ret = leaf->next;
X     else
X      ret = (filerec *) NULL;
X     if (ret) if (ret->freed)
X      ret = next_directory(ret);
X     return(ret);
X}
X
X
Xfilerec *next_specified_directory(leaf)
Xfilerec *leaf;
X{
X     while (leaf = next_directory(leaf))
X      if (leaf->specified)
X           return(leaf);
X     return ((filerec *) NULL);
X}
X
X
X
Xfilerec *next_in_directory(leaf)
Xfilerec *leaf;
X{
X     filerec *ret;
X
X     if (leaf->next)
X      ret = leaf->next;
X     else if (((leaf->specs.st_mode & S_IFMT) != S_IFDIR) && leaf->parent)
X      ret = leaf->parent->dirs;
X     else
X      ret = (filerec *) NULL;
X     if (ret) if (ret->freed)
X      ret = next_in_directory(ret);
X     return (ret);
X}
X
X
X
X
Xfilerec *next_specified_in_directory(leaf)
Xfilerec *leaf;
X{
X     while (leaf = next_in_directory(leaf))
X      if (leaf->specified)
X           return(leaf);
X     return ((filerec *) NULL);
X}
X
X
X
Xfilerec *first_in_directory(leaf)
Xfilerec *leaf;
X{
X     filerec *ret;
X
X     if ((leaf->specs.st_mode & S_IFMT) != S_IFDIR)
X      ret = (filerec *) NULL;
X     else if (leaf->files)
X      ret = leaf->files;
X     else if (leaf->dirs)
X      ret =  leaf->dirs;
X     else
X      ret = (filerec *) NULL;
X     if (ret) if (ret->freed)
X      ret = next_in_directory(ret);
X     return(ret);
X}
X
X
Xfilerec *first_specified_in_directory(leaf)
Xfilerec *leaf;
X{
X     leaf = first_in_directory(leaf);
X     if (! leaf)
X      return((filerec *) NULL);
X
X     if (leaf->specified)
X      return(leaf);
X     else
X      leaf = next_specified_in_directory(leaf);
X     return (leaf);
X}
X
X
Xvoid print_paths_from(leaf)
Xfilerec *leaf;
X{
X     char buf[MAXPATHLEN];
X
X     printf("%s\n", get_leaf_path(leaf, buf));
X     if (leaf->dirs)
X      print_paths_from(leaf->dirs);
X     if (leaf->files)
X      print_paths_from(leaf->files);
X     if (leaf->next)
X      print_paths_from(leaf->next);
X}
X
X
Xvoid print_specified_paths_from(leaf)
Xfilerec *leaf;
X{
X     char buf[MAXPATHLEN];
X
X     if (leaf->specified)
X      printf("%s\n", get_leaf_path(leaf, buf));
X     if (leaf->dirs)
X      print_specified_paths_from(leaf->dirs);
X     if (leaf->files)
X      print_specified_paths_from(leaf->files);
X     if (leaf->next)
X      print_specified_paths_from(leaf->next);
X}
X
X
Xint add_file_to_parent(parent, name, specified, last)
Xfilerec *parent, **last;
Xchar *name;
XBoolean specified;
X{
X     filerec *files;
X
X     *last = files = (filerec *) NULL;
X     files = parent->files;
X     while (files) {
X      if (! strcmp(files->name, name))
X           break;
X      *last = files;
X      files = files->next;
X     }
X     if (files) {
X      files->specified = (files->specified || specified);
X      *last = files;
X      return 0;
X     }
X     if (*last) {
X      (*last)->next = (filerec *) Malloc((unsigned) sizeof(filerec));
X      if (! (*last)->next) {
X           set_error(errno);
X           error("Malloc");
X           return error_code;
X      }
X      *(*last)->next = default_file;
X      (*last)->next->previous = *last;
X      (*last)->next->parent = parent;
X      (*last) = (*last)->next;
X     }
X     else {
X      parent->files = (filerec *) Malloc(sizeof(filerec));
X      if (! parent->files) {
X           set_error(errno);
X           error("Malloc");
X           return error_code;
X      }
X      *parent->files = default_file;
X      parent->files->parent = parent;
X      parent->files->previous = (filerec *) NULL;
X      *last = parent->files;
X     }
X     (void) strcpy((*last)->name, name);
X     (*last)->specified = specified;
X     return 0;
X}
X
X
X
X
X
Xint add_directory_to_parent(parent, name, specified, last)
Xfilerec *parent, **last;
Xchar *name;
XBoolean specified;
X{
X     filerec *directories;
X
X     *last = (filerec *) NULL;
X     directories = parent->dirs;
X     while (directories) {
X      if (! strcmp(directories->name, name))
X           break;
X      (*last) = directories;
X      directories = directories->next;
X     }
X     if (directories) {
X      directories->specified = (directories->specified || specified);
X      *last = directories;
X      return 0;
X     }
X     if (*last) {
X      (*last)->next = (filerec *) Malloc(sizeof(filerec));
X      if (! (*last)->next) {
X           set_error(errno);
X           error("Malloc");
X           return error_code;
X      }
X      *(*last)->next = default_directory;
X      (*last)->next->previous = *last;
X      (*last)->next->parent = parent;
X      (*last) = (*last)->next;
X     }
X     else {
X      parent->dirs = (filerec *) Malloc(sizeof(filerec));
X      if (! parent->dirs) {
X           set_error(errno);
X           error("Malloc");
X           return error_code;
X      }
X      *parent->dirs = default_directory;
X      parent->dirs->parent = parent;
X      parent->dirs->previous = (filerec *) NULL;
X      (*last) = parent->dirs;
X     }
X     (void) strcpy((*last)->name, name);
X     (*last)->specified = specified;
X     return 0;
X}
X
X
X
X
X
Xvoid free_leaf(leaf)
Xfilerec *leaf;
X{
X     leaf->freed = True;
X     if (! (leaf->dirs || leaf->files)) {
X      if (leaf->previous)
X           leaf->previous->next = leaf->next;
X      if (leaf->next)
X           leaf->next->previous = leaf->previous;
X      if (leaf->parent) {
X           if ((leaf->specs.st_mode & S_IFMT) == S_IFDIR) {
X            if (leaf->parent->dirs == leaf) {
X             leaf->parent->dirs = leaf->next;
X             if (leaf->parent->freed)
X                  free_leaf(leaf->parent);
X            }
X           }
X           else {
X            if (leaf->parent->files == leaf) {
X             leaf->parent->files = leaf->next;
X             if (leaf->parent->freed)
X                  free_leaf(leaf->parent);
X            }
X           }
X           free((char *) leaf);
X      }
X     }
X}
X
X
X
Xint find_child(directory, name, child)
Xfilerec *directory, **child;
Xchar *name;
X{
X     filerec *ptr;
X
X     *child = (filerec *) NULL;
X     if ((directory->specs.st_mode & S_IFMT) != S_IFDIR)
X      return DIR_NOT_DIRECTORY;
X     ptr = directory->dirs;
X     while (ptr)
X      if (strcmp(ptr->name, name))
X           ptr = ptr->next;
X      else
X           break;
X     if (ptr) {
X      *child = ptr;
X      return DIR_MATCH;
X     }
X     ptr = directory->files;
X     while (ptr)
X      if (strcmp(ptr->name, name))
X           ptr = ptr->next;
X          else
X           break;
X     if (ptr) {
X      *child = ptr;
X      return DIR_MATCH;
X     }
X     set_status(DIR_NO_MATCH);
X     return DIR_NO_MATCH;
X}
X
X
X
X
X
Xint change_path(old_path, new_path)
Xchar *old_path, *new_path;
X{
X     char next_old[MAXNAMLEN], next_new[MAXNAMLEN];
X     char rest_old[MAXPATHLEN], rest_new[MAXPATHLEN];
X     int retval;
X     filerec *current;
X
X     if (*old_path == '/') {
X      current = &root_tree;
X      old_path++;
X      new_path++;
X     }
X     else if (! strncmp(old_path, "./", 2)) {
X      current = &cwd_tree;
X      old_path += 2;
X      new_path += 2;
X     }
X     else
X      current = &cwd_tree;
X
X     (void) strcpy(next_old, firstpart(old_path, rest_old));
X     (void) strcpy(next_new, firstpart(new_path, rest_new));
X     while (*next_old && *next_new) {
X      retval = find_child(current, next_old, ¤t);
X      if (retval == DIR_MATCH) {
X           if (current) {
X            (void) strcpy(current->name, next_new);
X            current->specified = False;
X           }
X           else {
X            set_error(INTERNAL_ERROR);
X            error("change_path");
X            return error_code;
X           }
X      }
X      else {
X           error("change_path");
X           return retval;
X      }
X
X      (void) strcpy(next_old, firstpart(rest_old, rest_old));
X      (void) strcpy(next_new, firstpart(rest_new, rest_new));
X     }
X     return 0;
X}
X
X
Xint get_leaf_path(leaf, leaf_buf)
Xfilerec *leaf;
Xchar leaf_buf[]; /* RETURN */
X{
X     char *name_ptr;
X
X     name_ptr = Malloc(1);
X     if (! name_ptr) {
X      set_error(errno);
X      error("Malloc");
X      *leaf_buf = '\0';
X      return error_code;
X     }
X     *name_ptr = '\0';
X     do {
X      name_ptr = realloc((char *) name_ptr, (unsigned)
X                 (strlen(leaf->name) + strlen(name_ptr) + 2));
X      if (! name_ptr) {
X           set_error(errno);
X           *leaf_buf = '\0';
X           error("realloc");
X           return error_code;
X      }
X      (void) strcpy(leaf_buf, name_ptr);
X      *name_ptr = '\0';
X      if (leaf->parent) if (leaf->parent->parent)
X           (void) strcat(name_ptr, "/");
X      (void) strcat(name_ptr, leaf->name);
X      (void) strcat(name_ptr, leaf_buf);
X      leaf = leaf->parent;
X     } while (leaf);
X     (void) strcpy(leaf_buf, name_ptr);
X     return 0;
X}
X
X
X
X
X
Xint accumulate_names(leaf, in_strings, num)
Xfilerec *leaf;
Xchar ***in_strings;
Xint *num;
X{
X     char newname[MAXPATHLEN];
X     char **strings;
X     int retval;
X
X     strings = *in_strings;
X     if (leaf->specified) {
X      *num += 1;
X      strings = (char **) realloc((char *) strings, (unsigned)
X                      (sizeof(char *) * (*num)));
X      if (! strings) {
X           set_error(errno);
X           error("realloc");
X           return error_code;
X      }
X      if (retval = get_leaf_path(leaf, newname)) {
X           error("get_leaf_path");
X           return retval;
X      }
X      (void) convert_to_user_name(newname, newname);
X      strings[*num - 1] = Malloc((unsigned) (strlen(newname) + 1));
X      if (! strings[*num - 1]) {
X           set_error(errno);
X           error("Malloc");
X           return error_code;
X      }
X      (void) strcpy(strings[*num - 1], newname);
X     }
X     if (leaf->files) if (retval = accumulate_names(leaf->files, &strings,
X                            num)) {
X      error("accumulate_names");
X      return retval;
X     }
X     if (leaf->dirs) if (retval = accumulate_names(leaf->dirs, &strings,
X                           num)) {
X      error("accumulate_names");
X      return retval;
X     }
X     if (leaf->next) if (retval = accumulate_names(leaf->next, &strings,
X                           num)) {
X      error("accumulate_names");
X      return retval;
X     }
X
X     *in_strings = strings;
X     return 0;
X}
END_OF_FILE
if test 15169 -ne `wc -c <'directories.c'`; then
    echo shar: \"'directories.c'\" unpacked with wrong size!
fi
# end of 'directories.c'
fi
echo shar: End of archive 3 \(of 4\).
cp /dev/null ark3isdone
MISSING=""
for I in 1 2 3 4 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 4 archives.
    rm -f ark[1-9]isdone
else
    echo You still need to unpack the following archives:
    echo "        " ${MISSING}
fi
##  End of shell archive.
exit 0

exit 0 # Just in case...
--
Kent Landfield                   INTERNET: [e-mail]
Sterling Software, IMD           UUCP:     uunet!sparky!kent
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