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ls.c
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/* $Header: /home/ksheff/src/e2tools/RCS/ls.c,v 0.8 2004/04/07 03:30:49 ksheff Exp $ */
/*
* ls.c --- list directories
*
* Copyright (C) 1997 Theodore Ts'o. This file may be redistributed
* under the terms of the GNU Public License.
*
* Modified by Keith W. Sheffield <[email protected]> for inclusion with e2tools
*/
/*
* $Log: ls.c,v $
* Revision 0.8 2004/04/07 03:30:49 ksheff
* Updated usage string.
*
* Revision 0.7 2004/04/07 02:41:50 ksheff
* Modified to bracket files with an inode number of 0 with >< characters.
*
* Revision 0.6 2004/04/06 20:27:26 ksheff
* Modified to print "No files found!" for empty directories, corrected the
* directory name display, and fixed REGEX_OPT masking.
*
* Revision 0.5 2002/06/05 23:14:11 ksheff
* Fixed short display with respect to displaying the contents of multiple
* directories.
*
* Revision 0.4 2002/06/05 23:07:34 ksheff
* Allowed for multiple directory and file specifications. Added the -f
* option for no sorting.
*
* Revision 0.3 2002/06/03 23:00:51 ksheff
* Removed display code from directory iterator. A list of displayable files
* is now generated. This list can be sorted and displayed in a variety of
* ways. The -a, -c, -i, -r, and -t options are now accepted.
*
* Revision 0.2 2002/03/05 12:12:52 ksheff
* Removed setting optind for SCO.
*
* Revision 0.1 2002/02/27 04:46:21 ksheff
* initial revision
*
*/
#include "e2tools.h"
#include "elist.h"
#include "ls.h"
#include <regex.h>
#include <stdint.h>
#include <inttypes.h>
#include <pwd.h>
#include <grp.h>
/*
* list directory
*/
#define LONG_OPT 0x0001
#define DELETED_OPT 0x0002
#define REGEX_OPT 0x0004
#define REVERSE_OPT 0x0008
#define HIDDEN_OPT 0x0010
#define CREATE_OPT 0x0020
#define INODE_OPT 0x0040
#define NUMERIC_OPT 0x0080
#define DIRECTORY_TYPE -1
#define NORMAL_TYPE 0
struct list_dir_struct
{
int options;
regex_t *reg;
elist_t *files;
};
typedef struct list_file_struct
{
char *name;
struct ext2_inode inode;
ext2_ino_t dir;
ext2_ino_t inode_num;
int entry;
long type;
} ls_file_t;
static const char *monstr[] =
{ "Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
static ext2_filsys fs;
static int max_name_len = 0;
static int
list_dir_proc(ext2_ino_t dir, int entry, struct ext2_dir_entry *dirent,
int offset, int blocksize, char *buf, void *private);
void
free_ls_file_t(void *f);
void
long_disp(ls_file_t *info, int *col, int options);
void
short_disp(ls_file_t *info, int *col, int options);
int
no_sort(const void *n1, const void *n2);
int
name_sort(const void *n1, const void *n2);
int
inode_sort(const void *n1, const void *n2);
int
mod_time_sort(const void *n1, const void *n2);
int
creat_time_sort(const void *n1, const void *n2);
long
add_ls_file(char *name, int namelen, ext2_ino_t dir, ext2_ino_t ino,
int entry, int type, struct list_dir_struct *ls);
elist_t *
remove_ls_dups(elist_t *list);
/* Name: list_dir_proc()
*
* Description:
*
*
* Algorithm:
*
*
* Global Variables:
*
* None
*
* Arguments:
*
*
* Return Values:
*
*
* Author: Theodore Ts'o
* Date: 1997
*
* Modification History:
*
* MM/DD/YY Name Description
* 02/27/02 K.Sheffield Modified for use with e2tools
*/
static int
list_dir_proc(ext2_ino_t dir, int entry, struct ext2_dir_entry *dirent,
int UNUSED_PARM(offset), int UNUSED_PARM(blocksize),
char UNUSED_PARM(*buf), void *private)
{
char name[EXT2_NAME_LEN];
struct list_dir_struct *ls = (struct list_dir_struct *) private;
int thislen;
thislen = ((dirent->name_len & 0xFF) < EXT2_NAME_LEN) ?
(dirent->name_len & 0xFF) : EXT2_NAME_LEN;
strncpy(name, dirent->name, thislen);
name[thislen] = '\0';
/* skip hidden files unless we ask for them */
if (0 == (ls->options & HIDDEN_OPT) &&
name[0] == '.')
return(0);
if ((ls->options & REGEX_OPT) &&
regexec(ls->reg, name, 0, NULL, 0))
return(0);
return(add_ls_file(name, thislen, dir, dirent->inode, entry, NORMAL_TYPE,
ls));
}
/* Name: add_ls_file()
*
* Description:
*
*
* Algorithm:
*
*
* Global Variables:
*
* None
*
* Arguments:
*
*
* Return Values:
*
*
* Author: K.Sheffield
* Date: 02/27/2002
*
* Modification History:
*
* MM/DD/YY Name Description
*/
long
add_ls_file(char *name, int namelen, ext2_ino_t dir, ext2_ino_t ino,
int entry, int type, struct list_dir_struct *ls)
{
ls_file_t *file_info;
elist_t *flist;
if (NULL == (file_info = calloc(sizeof(ls_file_t),1)))
{
perror("list_dir");
return(0);
}
file_info->dir = dir;
if (entry == DIRENT_DELETED_FILE)
file_info->inode_num = 0;
else
file_info->inode_num = ino;
file_info->entry = entry;
file_info->type = type;
if (file_info->inode_num)
{
if (read_inode(fs, file_info->inode_num, &file_info->inode))
{
free(file_info);
return 0;
}
}
if (name)
file_info->name = strdup(name);
if (NULL == (flist = elist_insert(ls->files, file_info)))
{
perror("list_dir");
free_ls_file_t(file_info);
return 0;
}
ls->files = flist;
if (max_name_len < namelen)
max_name_len = namelen;
return 0;
}
/* Name: free_ls_file_t()
*
* Description:
*
* This function is used to free an ls_file_t structure.
*
* Algorithm:
*
* Free the file's name if it is not NULL
* Free the ls_file_t structure
* Check to make sure the ls_file_t structure is not NULL
*
* Global Variables:
*
* None.
*
* Arguments:
*
* void *f; The structure to free
*
* Return Values:
*
* none
*
* Author: Keith W. Sheffield
* Date: 06/03/2002
*
* Modification History:
*
* MM/DD/YY Name Description
*
*/
void free_ls_file_t(void *f)
{
ls_file_t *n = (ls_file_t *) f;
if (n != NULL)
{
if (n->name != NULL)
free(n->name);
free(n);
}
} /* end of free_ls_file_t */
/* Name: do_list_dir()
*
* Description:
*
*
* Algorithm:
*
*
* Global Variables:
*
* None
*
* Arguments:
*
*
* Return Values:
*
*
* Author: Theodore Ts'o
* Date: 1997
*
* Modification History:
*
* MM/DD/YY Name Description
* 02/27/02 K.Sheffield Modified for use with e2tools
* 04/06/04 K.Sheffield Modified to print "No Files Found!" for
* each empty directory. Corrected masking
* out REGEX_OPT.
*/
long
do_list_dir(int argc, char *argv[])
{
ext2_ino_t root;
ext2_ino_t cwd;
ext2_ino_t inode=0;
int retval;
int c;
int flags;
struct list_dir_struct ls;
char *fs_name;
char *last_fs_name;
char *path = NULL;
char *dup_path = NULL;
char *dir_name;
char *base_name;
int (*file_sort)(const void *n1, const void *n2) = name_sort;
void (*file_disp)(ls_file_t *n, int *col, int options) = short_disp;
elist_t *files=NULL;
int col=0;
ls_file_t *cur_file;
long last_type = 1;
memset(&ls, 0, sizeof(ls));
last_fs_name = NULL;
#ifdef HAVE_OPTRESET
optreset = 1; /* Makes BSD getopt happy */
#endif
while ((c = getopt (argc, argv, "acDd:filnrt")) != EOF)
{
switch (c)
{
case 'a':
ls.options |= HIDDEN_OPT;
break;
case 'c':
ls.options |= CREATE_OPT;
break;
case 'l':
file_disp = long_disp;
break;
case 'n':
file_disp = long_disp;
ls.options |= NUMERIC_OPT;
break;
case 'D':
ls.options |= DELETED_OPT;
break;
case 'd':
fs_name = optarg;
if (NULL != (path = strchr(fs_name, ':')))
*path++ = '\0';
if ((retval = open_filesystem(fs_name, &fs, &root, 0)))
{
return(1);
}
last_fs_name = fs_name;
break;
case 'f':
file_sort = no_sort;
break;
case 't':
file_sort = mod_time_sort;
break;
case 'r':
ls.options |= REVERSE_OPT;
break;
case 'i':
file_sort = inode_sort;
ls.options |= INODE_OPT;
break;
}
}
if (argc <= optind)
{
fputs("Usage: e2ls [-acDfilrt][-d dir] file\n", stderr);
return(1);
}
if (ls.options & CREATE_OPT &&
(file_sort == mod_time_sort || file_disp != long_disp))
file_sort = creat_time_sort;
/* sort the remaining command line arguments */
qsort(argv+optind, argc-optind, sizeof(char *), my_strcmp);
for(c=optind;c<argc;c++)
{
fs_name = argv[c];
if (NULL != (path = strchr(fs_name, ':')))
*path++ = '\0';
else if (last_fs_name != NULL)
{
path = fs_name;
fs_name = last_fs_name;
}
/* keep a copy of the file path for later because get_file_parts() is
* destructive.
*/
if (dup_path)
{
free(dup_path);
dup_path = NULL;
}
if (path)
dup_path = strdup(path);
if (last_fs_name == NULL || strcmp(last_fs_name, fs_name))
{
if (last_fs_name != NULL)
ext2fs_close(fs);
if ((retval = open_filesystem(fs_name, &fs, &root, 0)))
{
return(1);
}
last_fs_name = fs_name;
}
dir_name = NULL;
cwd = root;
ls.options &= (~REGEX_OPT);
if (path != NULL && *path != '\0')
{
if (get_file_parts(fs, root, path, &cwd, &dir_name, &base_name))
{
ext2fs_close(fs);
return(-1);
}
if (is_file_regexp(base_name))
{
if (NULL == (ls.reg = (regex_t *) make_regexp(base_name)))
{
fprintf(stderr,
"Error creating regular expression for %s\n",
base_name);
return(1);
}
ls.options |= REGEX_OPT;
inode = cwd;
}
/* check to see if the file name exists in the current directory
*/
else if ((retval = ext2fs_namei(fs, cwd, cwd, base_name, &inode)))
{
fputs(error_message(retval), stderr);
ext2fs_close(fs);
return(1);
}
}
else
inode = root;
if(!dir_name)
dir_name = ".";
if (!inode)
continue;
flags = DIRENT_FLAG_INCLUDE_EMPTY;
if (ls.options & DELETED_OPT)
flags |= DIRENT_FLAG_INCLUDE_REMOVED;
if ((retval = ext2fs_check_directory(fs, inode)))
{
if (retval != EXT2_ET_NO_DIRECTORY)
{
fputs(error_message(retval), stderr);
ext2fs_close(fs);
return(1);
}
if(add_ls_file(dir_name, 0, cwd, 0, 0, DIRECTORY_TYPE, &ls))
{
fputs(error_message(retval), stderr);
ext2fs_close(fs);
return(1);
}
if(add_ls_file(base_name, strlen(base_name), cwd, inode, 0,
NORMAL_TYPE, &ls))
{
fputs(error_message(retval), stderr);
ext2fs_close(fs);
return(1);
}
}
else
{
if (ls.options & REGEX_OPT || path == NULL || *path == '\0')
path = dir_name;
else if (dup_path)
path = dup_path;
// if(add_ls_file((ls.options & REGEX_OPT) ? dir_name : path, 0, inode, 0,
if(add_ls_file(path, 0, inode, 0, 0, DIRECTORY_TYPE, &ls))
{
fputs(error_message(retval), stderr);
ext2fs_close(fs);
return(1);
}
retval = ext2fs_dir_iterate2(fs, inode, flags, 0, list_dir_proc,
&ls);
if (retval)
{
fputs(error_message(retval), stderr);
ext2fs_close(fs);
return(1);
}
}
}
elist_sort(ls.files, file_sort, ls.options & REVERSE_OPT);
ls.files = files = remove_ls_dups(ls.files);
if (files == NULL)
printf("No files found!");
else
{
while(files != NULL)
{
cur_file = (ls_file_t *)files->data;
if (cur_file->type == DIRECTORY_TYPE)
{
if (col > 0)
{
putchar('\n');
col = 0;
}
if (last_type == DIRECTORY_TYPE)
printf("No files found!\n");
printf("%s:", cur_file->name);
}
else
{
if (last_type == DIRECTORY_TYPE)
putchar('\n');
(file_disp)(cur_file, &col, ls.options);
}
last_type = cur_file->type;
files = files->next;
}
if (last_type == DIRECTORY_TYPE)
printf("No files found!");
}
putchar('\n');
elist_free(ls.files, free_ls_file_t);
ext2fs_close(fs);
return(0);
}
/* Name: long_disp()
*
* Description:
*
* This function displays a file's information for a long listing
*
* Algorithm:
*
* Generate the time string for the modification time
* Display the file's permission bits, owner, group, mod time, and name
*
* Global Variables:
*
* none
*
* Arguments:
*
* ls_file_t *info; The structure containing the file information
* int *col; The current column - unused
* int options; Options to ls
*
* Return Values:
*
* None
*
* Author: Keith W. Sheffield
* Date: 06/03/2002
*
* Modification History:
*
* MM/DD/YY Name Description
* 06/06/02 K.Sheffield Increased file size width
* 04/06/04 K.Sheffield Modified to show entries with an inode of 0
* as deleted.
*/
void long_disp(ls_file_t *info, int UNUSED_PARM(*col), int options)
{
char lbr, rbr;
char modestr[11];
char userstr[9];
char groupstr[9];
char datestr[80];
time_t modtime;
struct tm *tm_p;
if (info->entry == DIRENT_DELETED_FILE ||
info->inode_num == 0)
{
lbr = '>';
rbr = '<';
}
else
{
lbr = rbr = ' ';
}
sprintf(modestr, "%c%c%c%c%c%c%c%c%c%c",
LINUX_S_ISLNK(info->inode.i_mode) ? 'l' :
LINUX_S_ISDIR(info->inode.i_mode) ? 'd' :
LINUX_S_ISCHR(info->inode.i_mode) ? 'c' :
LINUX_S_ISBLK(info->inode.i_mode) ? 'b' :
LINUX_S_ISFIFO(info->inode.i_mode) ? 'p' :
LINUX_S_ISSOCK(info->inode.i_mode) ? 's' : '-',
(info->inode.i_mode & (1 << 8)) ? 'r' : '-',
(info->inode.i_mode & (1 << 7)) ? 'w' : '-',
(info->inode.i_mode & LINUX_S_ISUID) ? 'S' :
(info->inode.i_mode & (1 << 6)) ? 'x' : '-',
(info->inode.i_mode & (1 << 5)) ? 'r' : '-',
(info->inode.i_mode & (1 << 4)) ? 'w' : '-',
(info->inode.i_mode & LINUX_S_ISGID) ? 'S' :
(info->inode.i_mode & (1 << 3)) ? 'x' : '-',
(info->inode.i_mode & (1 << 2)) ? 'r' : '-',
(info->inode.i_mode & (1 << 1)) ? 'w' : '-',
(info->inode.i_mode & LINUX_S_ISVTX) ? 'T' :
(info->inode.i_mode & (1 << 0)) ? 'x' : '-');
if (info->inode_num)
{
if (options & CREATE_OPT)
modtime = info->inode.i_ctime;
else
modtime = info->inode.i_mtime;
tm_p = localtime(&modtime);
sprintf(datestr, "%2d-%s-%4d %02d:%02d",
tm_p->tm_mday, monstr[tm_p->tm_mon],
1900 + tm_p->tm_year, tm_p->tm_hour,
tm_p->tm_min);
}
else
strcpy(datestr, " ");
if (options & NUMERIC_OPT)
{
const int userlen = 5;
sprintf(userstr, "%*d", userlen, info->inode.i_uid);
sprintf(groupstr, "%*d", userlen, info->inode.i_gid);
}
else
{
const int userlen = 8;
char buf[1024];
struct passwd pwd, *p_pwd;
struct group grp, *p_grp;
getpwuid_r(info->inode.i_uid, &pwd, buf, sizeof(buf), &p_pwd);
if (p_pwd)
snprintf(userstr, userlen+1, "%*s", userlen, pwd.pw_name);
else
sprintf(userstr, "%*d", userlen, info->inode.i_uid);
getgrgid_r(info->inode.i_gid, &grp, buf, sizeof(buf), &p_grp);
if (p_grp)
snprintf(groupstr, userlen+1, "%*s", userlen, grp.gr_name);
else
sprintf(groupstr, "%*d", userlen, info->inode.i_gid);
}
printf("%c%6u%c %10s %s %s ", lbr, info->inode_num, rbr,
modestr, userstr, groupstr);
if (LINUX_S_ISDIR(info->inode.i_mode))
printf("%7d", info->inode.i_size);
else
printf("%7" PRIu64, (uint64_t)(info->inode.i_size |
((__u64)info->inode.i_size_high << 32)));
printf(" %s %s\n", datestr, info->name);
} /* end of long_disp */
/* Name: short_disp()
*
* Description:
*
* This function displays a file's information for a long listing
*
* Algorithm:
*
* Display the file's name at the appropriate column.
*
* Global Variables:
*
* none
*
* Arguments:
*
* ls_file_t *info; The structure containing the file information
* int *col; The current column
* int options; Options to ls
*
* Return Values:
*
* None
*
* Author: Keith W. Sheffield
* Date: 06/03/2002
*
* Modification History:
*
* MM/DD/YY Name Description
* 04/06/04 K.Sheffield Modified to show entries with an inode of 0
* as deleted.
*/
void short_disp(ls_file_t *info, int *col, int options)
{
char lbr, rbr;
char tmp[300];
int thislen;
static int max_col_size = 0;
if (max_col_size == 0)
{
max_col_size = 80/(max_name_len + 2 + ((options & INODE_OPT) ? 8 : 0));
if (max_col_size == 0)
max_col_size = -1;
else
max_col_size = 80/max_col_size;
}
if (info->entry == DIRENT_DELETED_FILE ||
info->inode_num == 0)
{
lbr = '>';
rbr = '<';
}
else
{
lbr = 0;
rbr = ' ';
}
if (lbr == 0)
{
if (options & INODE_OPT)
sprintf(tmp, "%7d %s%c", info->inode_num, info->name, rbr);
else
sprintf(tmp, "%s%c", info->name, rbr);
}
else
{
if (options & INODE_OPT)
sprintf(tmp, "%7d %c%s%c", info->inode_num, lbr, info->name, rbr);
else
sprintf(tmp, "%c%s%c", lbr, info->name, rbr);
}
thislen = strlen(tmp);
if (*col + thislen > 80)
{
putchar('\n');
*col = 0;
}
thislen = max_col_size - thislen;
if (thislen < 0)
thislen = 0;
printf("%s%*.*s", tmp, thislen, thislen, "");
*col += max_col_size;
}
/* Name: no_sort()
*
* Description:
*
* This function sorts two ls_file_t structures by the file name
*
* Algorithm:
*
* Assign two ls_file_t pointers from the input void pointers
* Return the result of the comparison of the directories & type
*
* Global Variables:
*
* None
*
* Arguments:
*
* void *n1; The first node being compared
* void *n2; The second node being compared
*
* Return Values:
*
* >0 - n1 > n2
* =0 - n1 == n2
* <0 - n1 < n2
*
* Author: Keith W. Sheffield
* Date: 06/03/2002
*
* Modification History:
*
* MM/DD/YY Name Description
*
*/
int no_sort(const void *n1, const void *n2)
{
ls_file_t *f1 = *((ls_file_t **) n1);
ls_file_t *f2 = *((ls_file_t **) n2);
int retval;
return((retval = (f1->dir - f2->dir)) ? retval : (f1->type - f2->type));
} /* end of name_sort */
/* Name: name_sort()
*
* Description:
*
* This function sorts two ls_file_t structures by the file name
*
* Algorithm:
*
* Assign two ls_file_t pointers from the input void pointers
* Return the result of the comparison of the names
*
* Global Variables:
*
* None
*
* Arguments:
*
* void *n1; The first node being compared
* void *n2; The second node being compared
*
* Return Values:
*
* >0 - n1 > n2
* =0 - n1 == n2
* <0 - n1 < n2
*
* Author: Keith W. Sheffield
* Date: 06/03/2002
*
* Modification History:
*
* MM/DD/YY Name Description
*
*/
int name_sort(const void *n1, const void *n2)
{
ls_file_t *f1 = *((ls_file_t **) n1);
ls_file_t *f2 = *((ls_file_t **) n2);
int retval;
return((retval = (f1->dir - f2->dir)) ? retval :
((retval = (f1->type - f2->type)) ? retval :
strcmp(f1->name, f2->name)));
} /* end of name_sort */
/* Name: inode_sort()
*
* Description:
*
* This function sorts two ls_file_t structures by the file inode number
*
* Algorithm:
*
* Assign two ls_file_t pointers from the input void pointers
* Return the result of the comparison of the inode numbers
*
* Global Variables:
*
* None
*
* Arguments:
*
* void *n1; The first node being compared
* void *n2; The second node being compared
*
* Return Values:
*
* >0 - n1 > n2
* =0 - n1 == n2
* <0 - n1 < n2
*
* Author: Keith W. Sheffield
* Date: 06/03/2002
*
* Modification History:
*
* MM/DD/YY Name Description
*
*/
int inode_sort(const void *n1, const void *n2)
{
ls_file_t *f1 = *((ls_file_t **) n1);
ls_file_t *f2 = *((ls_file_t **) n2);
int retval;
return((retval = (f1->dir - f2->dir)) ? retval :
((retval = (f1->type - f2->type)) ? retval :
(int)(f1->inode_num - f2->inode_num)));
} /* end of inode_sort */
/* Name: mod_time_sort()
*
* Description:
*
* This function sorts two ls_file_t structures by the file modification time
*
* Algorithm:
*
* Assign two ls_file_t pointers from the input void pointers
* Return the result of the comparison of the modification time
*
* Global Variables:
*
* None
*
* Arguments:
*
* void *n1; The first node being compared
* void *n2; The second node being compared
*
* Return Values:
*
* >0 - n1 > n2
* =0 - n1 == n2
* <0 - n1 < n2
*
* Author: Keith W. Sheffield
* Date: 06/03/2002
*
* Modification History:
*
* MM/DD/YY Name Description
*
*/
int mod_time_sort(const void *n1, const void *n2)
{
ls_file_t *f1 = *((ls_file_t **) n1);
ls_file_t *f2 = *((ls_file_t **) n2);
int retval;
return((retval = (f1->dir - f2->dir)) ? retval :
((retval = (f1->type - f2->type)) ? retval :
(int)(f2->inode.i_mtime - f1->inode.i_mtime)));
} /* end of mod_time_sort */
/* Name: creat_time_sort()
*
* Description:
*
* This function sorts two ls_file_t structures by the file creation time