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freebsd/gnu/usr.bin/tar/gnu.c
Bruce Evans 2512f2fe3b Fixed printf format errors.
1998-06-30 20:14:13 +00:00

678 lines
14 KiB
C
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/* 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 ((unsigned char) *strp))
strp++;
ino = atol (strp);
while (isspace ((unsigned char) *strp))
strp++;
while (isdigit ((unsigned char) *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", (unsigned long) 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;
}
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