ProfitPress Mega CDROM2 …eeware (MSDOS)(1992)(Eng)/ProfitPress-MegaCDROM2.B6I/UTILITY/DIR/FDF_1_01.ZIP/FDFCOMM.C

C/C++ Source or Header | 1992-04-29 | 11.8 KB | 546 lines

/*
 * fdfcomm.c
 *
 * common functions for find duplicates program
 *
 * Roy Bixler
 * March 23, 1991
 *
 * This program 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 1, or (at your option)
 * any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */



#include <ctype.h>
#include <dir.h>
#include <dos.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sys\types.h>    /* must be included before stat.h */
#include <sys\stat.h>

#include "cmp.h"
#include "fdfcomm.h"
#include "elib.h"



FILE_LIST *F_list = NULL, *I_del_menu[N_INTERACTIVE];
char Match_criteria = 0, Sort_criteria = 0, Sort_order = ASCENDING;
char i_flag = 0;    /* interactive delete mode */
char l_flag = 0;    /* long listing? */
char v_flag = 0;    /* verbose? */
static char Sorted;



/*
 * print_fdate
 *
 * given a dta structure, print out the date in it
 */
void print_fdate(struct ffblk *dta)

{
    printf("%02d/%02d/%02d",
           (dta->ff_fdate >> 9) + 80,
           (dta->ff_fdate >> 5) & 0xf,
           (dta->ff_fdate) & 0x1f);
}



/*
 * print_ftime
 *
 * given a dta structure, print out the time in it
 */
void print_ftime(struct ffblk *dta)

{
    printf("%02d:%02d:%02d",
           (dta->ff_ftime >> 11),
           (dta->ff_ftime >> 5) & 0x3f,
           (dta->ff_ftime & 0x1f));
}



/*
 * print_fdatetime
 *
 * print the given dta's date, a space and the dta's time
 */
void print_fdatetime(struct ffblk *dta)

{
    print_fdate(dta);
    printf(" ");
    print_ftime(dta);
}



/*
 * print_fpath
 *
 * given a path and a dta, print the path with the dta's name tacked on the
 * end
 */
void print_fpath(char *path, char *f_name)

{
    static char *dir_sep = PATH_SEPARATOR;
    int path_len;

    if (path != NULL) {
        path_len = strlen(path);
        printf("%s%s%s", path,
               ((path_len > 0) && (path[path_len-1] == dir_sep[0]))
                ? ""
                : PATH_SEPARATOR,
                f_name);
    }
}

/*
 * long_listing
 *
 * print out the complete information on the given file
 */
void long_listing(char *path, struct ffblk *dta)

{
    if (path != NULL) {
        printf("%c ", (dta->ff_attrib == 0x10) ? 'd' : '-');
        print_fdatetime(dta);
        printf(" %8ld ", dta->ff_fsize);
         print_fpath(path, dta->ff_name);
        printf("\n");
    }
}

/*
 * print_match_header
 *
 * prints the first match of files
 */
void print_match_header(FILE_LIST *start)

{
    if (l_flag)
        return;    /* no header */
    else if (Match_criteria & NAMES_MATCH)
        printf("file %s found in directories:\n", start->dta.ff_name);
    else if (Match_criteria & CONTENTS_MATCH)
        printf("files with matching contents (size = %ld) found:\n",
               start->dta.ff_fsize);
    else if (Match_criteria & SIZES_MATCH)
        printf("files of length %ld found:\n", start->dta.ff_fsize);
    else if (Match_criteria & TIMES_MATCH) {
        printf("files with timestamp ");
        print_fdatetime(&start->dta);
        printf(" found:\n");
    }
}



/*
 * print_next_match
 *
 * prints out any matches after the first one
 */
void print_next_match(FILE_LIST *next, int menu_num)

{
    if (menu_num >= 0)
        printf("%d)%s", menu_num, (l_flag) ? " " : "");
    if (l_flag)
        long_listing(next->path, &next->dta);
    else if (Match_criteria & NAMES_MATCH)
        printf("\t%s\n", next->path);
    else {
        printf("\t"); print_fpath(next->path, next->dta.ff_name);
        printf("\n");
    }

    next->printed = 1;
}



/*
 * print_id_menu
 *
 * given a starting point in the file list, print out an interactive delete
 * menu.
 */
void print_id_menu(FILE_LIST **menu, int num_items)

{
    int i;

    print_match_header(menu[0]);
    for (i = 0; i < num_items; i++)
        print_next_match(menu[i], i+1);
}



/*
 * cmpflist
 *
 * returns non-zero if the FILE_LIST parameter is less/greater than the given
 * dta/path combination according to the sort criteria.  If sort
 * order is ASCENDING,  non-zero returned if FILE_LIST less than dta/path
 * combo, vice-versa for DESCENDING order.
 */
int cmpflist(FILE_LIST *fd, char *path, struct ffblk *dta)

{
    long cmptime_tmp;
    int tmp;

    switch (Sort_criteria) {
    case NAME_SORT:
        return (Sort_order == ASCENDING)
                    ? (((tmp = strcmp(fd->dta.ff_name, dta->ff_name)) < 0) ||
                       ((tmp == 0) && (strcmp(fd->path, path) <= 0)))
                    : (((tmp = strcmp(fd->dta.ff_name, dta->ff_name)) > 0) ||
                       ((tmp == 0) && (strcmp(fd->path, path) >= 0)));
    case SIZE_SORT:
        return (Sort_order == ASCENDING)
                    ? ((fd->dta.ff_fsize < dta->ff_fsize) ||
                       ((fd->dta.ff_fsize == dta->ff_fsize) &&
                        (strcmp(fd->dta.ff_name, dta->ff_name) < 0)) ||
                       ((fd->dta.ff_fsize == dta->ff_fsize) &&
                        (strcmp(fd->path, path) <= 0)))
                    : ((fd->dta.ff_fsize > dta->ff_fsize) ||
                       ((fd->dta.ff_fsize == dta->ff_fsize) &&
                        (strcmp(fd->dta.ff_name, dta->ff_name) > 0)) ||
                       ((fd->dta.ff_fsize == dta->ff_fsize) &&
                        (strcmp(fd->path, path) >= 0)));
    case TIME_SORT:
        return (Sort_order == ASCENDING)
                    ? (((cmptime_tmp = cmptime(&fd->dta, dta)) < 0) ||
                       ((cmptime_tmp == 0) &&
                        ((tmp = strcmp(fd->dta.ff_name,
                                       dta->ff_name)) < 0)) ||
                        ((tmp == 0) && (strcmp(fd->path, path) <= 0)))
                    : (((cmptime_tmp = cmptime(&fd->dta, dta)) > 0) ||
                       ((cmptime_tmp == 0) &&
                        ((tmp = strcmp(fd->dta.ff_name,
                                       dta->ff_name)) > 0)) ||
                        ((tmp == 0) && (strcmp(fd->path, path) >= 0)));
    default:
        return 0;    /* unknown sort criteria */
    }
}



/*
 * cmpflist_eq
 *
 * returns non-zero if the two FILE_LIST parameters are equal according to the
 * sort criteria.
 */
int cmpflist_eq(FILE_LIST *fd1, FILE_LIST *fd2)

{
    if (fd1 == NULL)
        return (fd2 == NULL);
    else if (fd2 == NULL)
        return 0;
    switch (Sort_criteria) {
    case NAME_SORT:
        return !strcmp(fd1->dta.ff_name, fd2->dta.ff_name);
    case SIZE_SORT:
        return (fd1->dta.ff_fsize == fd2->dta.ff_fsize);
    case TIME_SORT:
        return !cmptime(&fd1->dta, &fd2->dta);
    default:
        return 0;    /* unknown sort criteria */
    }
}



/*
 * files_match
 *
 * return non-zero if the given two files 'match' according to names and the
 * criteria set by the flags (contents, date/time, size or almost any
 * combination of these).
 */
int files_match(FILE_LIST *file1, FILE_LIST *file2)

{
    return (((!(Match_criteria & NAMES_MATCH)) ||
             (!strcmp(file1->dta.ff_name, file2->dta.ff_name))) &&
            ((!(Match_criteria & SIZES_MATCH)) ||
             (file1->dta.ff_fsize == file2->dta.ff_fsize)) &&
            ((!(Match_criteria & TIMES_MATCH)) ||
             (!cmptime(&file1->dta, &file2->dta))) &&
            ((!(Match_criteria & CONTENTS_MATCH)) ||
             (compare_path_name_files(file1->path, file1->dta.ff_name,
                                       file2->path, file2->dta.ff_name))));
}



/*
 * gen_list
 *
 * given a path, generate a list of all files in the path and its
 * subdirectories.
 */
void gen_list(char *path)

{
    struct ffblk dta;
    char *path_list, *save_path;

    if (path == NULL)
        return;
    path_list = append_dir_to_path(path, ADD_TO_PATH);
    if ((findfirst(path_list, &dta, FA_DIREC) >= 0) &&
        ((save_path = malloc((size_t) (strlen(path)+1))) != NULL)) {
        strcpy(save_path, path);
        do {
            if (dta.ff_attrib & FA_DIREC)
                gen_list_of_dir(path, dta.ff_name);
            else
                add_file_to_list(save_path, &dta);
        } while (!findnext(&dta));
    }

    free(path_list);
}



/*
 * add_file_to_list
 *
 * given a path and a file on the path, add it to the list according to the
 * sort criteria.
 */
void add_file_to_list(char *path, struct ffblk *dta)

{
    FILE_LIST *prev = NULL, *new, *cur = F_list;

    if (Sorted)
        while ((cur != NULL) && (cmpflist(cur, path, dta))) {
            prev = cur;
            cur = cur->next;
        }

    if ((new = malloc((size_t) sizeof(FILE_LIST))) == NULL) {
        printf("add_file_to_list: memory allocation failure\n");
        exit(-1);
    }
    else {
        memcpy(&new->dta, dta, sizeof(struct ffblk));
        new->path = path;
        new->added = 0;
        new->printed = 0;
        new->next = cur;
        if (prev == NULL)
            F_list = new;
        else
            prev->next = new;
    }
}



/*
 * gen_list_of_dir
 *
 * given a path and a sub-directory, call 'gen_list()' to generate a list
 * of the sub-directory on the path.
 */
void gen_list_of_dir(char *path, char *subdir)

{
    char *new_path;

    if (!is_special(subdir)) {
        gen_list(new_path = append_dir_to_path(path, subdir));
        if (v_flag > 1) {
            printf("Searching    ");
            print_fpath(path, subdir);
            printf("\n");
        }
        free(new_path);
    }
}



/*
 * list_files
 *
 * given a path, generate a linked list of files on the path or (recursively)
 * its subdirectories.  If 'sorted' is non-zero, make sure the list is
 * sorted.
 */
void list_files(char *prog_name, char *path, char sorted)

{
    struct stat statbuf;
    static char target_dir[MAX_STR];

    if (just_disk(path)){
        get_cur_path(path, target_dir);
        path = target_dir;
    }

    if  ((access(path, 0)) || ((!stat(path, &statbuf)) &&
          (!(statbuf.st_mode & S_IFDIR)))) {
        printf("%s: directory %s does not exist\n", prog_name, path);
        print_help();
        exit(-1);
    }
    else {
        Sorted = sorted;
        gen_list(path);
        if (v_flag > 1)
            printf("\n");
    }
}

void get_cur_path(char *new, char *target_dir)
{
    char cur_dir[MAX_STR];

    getcwd(cur_dir, MAX_STR);
    change_disk(new, cur_dir);
    getcwd(target_dir, MAX_STR);
    setdisk(*cur_dir - 'A');
    chdir(cur_dir);
}


void change_disk(char *dir, char *cur_dir)
{
    int maxdrives;

    if (isupper(*dir))
        tolower(*dir);
    maxdrives = setdisk(*dir - 'a');
    if (maxdrives < (*dir - 'a') + 1){
        setdisk(*cur_dir - 'A');
        printf("drive '%c' is not accessable\n", *dir);
        print_help();
        exit(-1);
    }

}

/*
 *    just_disk()
 *
 *    Input:
 *        dir - the directory to be checked
 *    Output:
 *        returns :
 *            1 - if 'dir' is a current directory (ie 'X:')
 *            0 - otherwise
 */

int just_disk(char *dir)
{
    if ((strlen(dir) == 2) && (*(dir + 1) == ':'))
            return(1);
    else
        return(0);
}


/*
 * print_flist
 *
 * given a pointer to the first entry of a file list, dump the list to standard
 * output
 */
void print_flist(FILE_LIST *flist)

{
    for (;flist != NULL; flist = flist->next)
        printf("path = %s\tname = %s\n", flist->path, flist->dta.ff_name);
}



/*
 * compare_path_name_files
 *
 * given a pair of files specified by path and name, return non-zero if their
 * contents match, zero if contents don't match.
 */
int compare_path_name_files(char *path1, char *name1, char *path2, char *name2)

{
    int ret_val;
    char *file1;
    char *file2;

    file1 = append_dir_to_path(path1, name1);
    file2 = append_dir_to_path(path2, name2);
    if ((file1 == NULL) || (file2 == NULL)) {
        printf("compare_path_name_files: memory allocation failed!\n");
        exit(-1);
    }

    ret_val = compare_files(file1, file2);

    free(file1);
    free(file2);

    return ret_val;
}



/*
 * delete_path_name_file
 *
 * given a file specified by path and name, return zero if the file was
 * successfully deleted, non-zero if not.  'force' parameter, if non-zero, will
 * try to change the mode of a file from read-only to delete it.
 */
int delete_path_name_file(char *path, char *f_name, char force)

{
    char *file = append_dir_to_path(path, f_name);
    int ret_val;

    if (file == NULL) {
        printf("delete_path_name_file: memory allocation failed\n");
        exit(-1);
    }

    ret_val = delete_file(file, force);

    free(file);

    return ret_val;
}