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This commit is contained in:
François Pinard
1994-11-16 02:46:03 +00:00
parent f420331fb4
commit a7d353a9f0
1 changed files with 56 additions and 120 deletions
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src/extract.c
+56 -120
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@@ -147,15 +147,12 @@ extract_archive()
/* int end_nulls; */
char **longp;
char *bp;
static char *longname;
static char *longlink;
int bumplongs;
saverec(&head); /* Make sure it sticks around */
userec(head); /* And go past it in the archive */
decode_header(head, &hstat, &head_standard, 1); /* Snarf fields */
if(f_confirm && !confirm("extract",head->header.name)) {
if(f_confirm && !confirm("extract",current_file_name)) {
if (head->header.isextended)
skip_extended_headers();
skip_file((long)hstat.st_size);
@@ -177,7 +174,7 @@ extract_archive()
*/
skipcrud = 0;
while (!f_absolute_paths
&& '/' == (longname ? longname : head->header.name)[skipcrud]) {
&& '/' == current_file_name[skipcrud]) {
static int warned_once = 0;
skipcrud++; /* Force relative path */
@@ -186,14 +183,11 @@ extract_archive()
}
}
bumplongs = (head->header.linkflag != LF_LONGNAME
&& head->header.linkflag != LF_LONGLINK);
switch (head->header.linkflag) {
default:
msg("Unknown file type '%c' for %s, extracted as normal file",
head->header.linkflag, skipcrud+head->header.name);
head->header.linkflag, skipcrud+current_file_name);
/* FALL THRU */
/*
@@ -272,8 +266,8 @@ extract_archive()
* Appears to be a file.
* See if it's really a directory.
*/
namelen = strlen(skipcrud+head->header.name)-1;
if (head->header.name[skipcrud+namelen] == '/')
namelen = strlen(skipcrud+current_file_name)-1;
if (current_file_name[skipcrud+namelen] == '/')
goto really_dir;
/* FIXME, deal with protection issues */
@@ -325,21 +319,16 @@ extract_archive()
/*
* With 3-arg open(), we can do this up right.
*/
fd = open((longname
? longname
: head->header.name) + skipcrud,
fd = open(skipcrud + current_file_name,
openflag, hstat.st_mode);
#endif
}
if (fd < 0) {
if (make_dirs(longname
? longname
: head->header.name) + skipcrud)
if (make_dirs(skipcrud + current_file_name))
goto again_file;
msg_perror("Could not create file %s",
skipcrud
+(longname ? longname : head->header.name));
skipcrud + current_file_name);
if (head->header.isextended)
skip_extended_headers();
skip_file((long)hstat.st_size);
@@ -359,12 +348,11 @@ extract_archive()
* that happen to contain the filename will look
* REAL interesting unless we do this.
*/
namelen = strlen(skipcrud+head->header.name);
namelen = strlen(skipcrud + current_file_name);
name = (char *) malloc((sizeof(char)) * namelen);
bcopy(skipcrud+head->header.name, name, namelen);
bcopy(skipcrud+current_file_name, name, namelen);
size = hstat.st_size;
extract_sparse_file(fd, &size, hstat.st_size,
longname ? longname : name);
extract_sparse_file(fd, &size, hstat.st_size, name);
}
else
for (size = hstat.st_size;
@@ -375,9 +363,7 @@ extract_archive()
numbytes;*/
if(f_multivol) {
save_name=(longname
? longname
: head->header.name);
save_name=current_file_name;
save_totsize=hstat.st_size;
save_sizeleft=size;
}
@@ -424,14 +410,10 @@ extract_archive()
*/
if(check<0)
msg_perror("couldn't write to file %s",
(longname
? longname
: head->header.name) + skipcrud);
skipcrud + current_file_name);
else
msg("could only write %d of %d bytes to file %s",
written,check,(longname
? longname
: head->header.name) + skipcrud);
written,check,skipcrud + current_file_name);
skip_file((long)(size - written));
break; /* Still do the close, mod time, chmod, etc */
}
@@ -469,9 +451,7 @@ extract_archive()
check = close(fd);
if (check < 0) {
msg_perror("Error while closing %s",
(longname
? longname
: head->header.name) + skipcrud);
skipcrud + current_file_name);
}
@@ -484,14 +464,10 @@ extract_archive()
* user; if running as root, we extract as the original owner.
*/
if (we_are_root || f_do_chown) {
if (chown((longname
? longname
: head->header.name) + skipcrud,
if (chown(skipcrud + current_file_name,
hstat.st_uid, hstat.st_gid) < 0) {
msg_perror("cannot chown file %s to uid %d gid %d",
(longname
? longname
: head->header.name) + skipcrud,
skipcrud + current_file_name,
hstat.st_uid,hstat.st_gid);
}
}
@@ -509,11 +485,9 @@ extract_archive()
acc_upd_times[0]=hstat.st_atime;
else acc_upd_times[0] = now; /* Accessed now */
acc_upd_times[1] = hstat.st_mtime; /* Mod'd */
if (utime((longname
? longname
: head->header.name) + skipcrud,
if (utime(skipcrud + current_file_name,
acc_upd_times) < 0) {
msg_perror("couldn't change access and modification times of %s",(longname ? longname : head->header.name) + skipcrud);
msg_perror("couldn't change access and modification times of %s",skipcrud + current_file_name);
}
}
/* We do the utime before the chmod because some versions of
@@ -535,10 +509,10 @@ extract_archive()
*/
if ((!f_keep)
|| (hstat.st_mode & (S_ISUID|S_ISGID|S_ISVTX))) {
if (chmod((longname ? longname : head->header.name) + skipcrud,
notumask & (int)hstat.st_mode) < 0) {
if (chmod(skipcrud + current_file_name,
notumask & (int)hstat.st_mode) < 0) {
msg_perror("cannot change mode of file %s to %ld",
(longname ? longname : head->header.name) + skipcrud,
skipcrud + current_file_name,
notumask & (int)hstat.st_mode);
}
}
@@ -551,38 +525,37 @@ extract_archive()
{
struct stat st1,st2;
check = link (longlink ? longlink : head->header.linkname,
(longname ? longname : head->header.name) + skipcrud);
check = link (current_link_name, skipcrud + current_file_name);
if (check == 0)
break;
if (make_dirs((longname ? longname : head->header.name) + skipcrud))
if (make_dirs(skipcrud + current_file_name))
goto again_link;
if(f_gnudump && errno==EEXIST)
break;
if(stat(longlink ? longlink : head->header.linkname, &st1) == 0
&& stat((longname ? longname : head->header.name) + skipcrud, &st2)==0
if(stat(current_link_name, &st1) == 0
&& stat(current_file_name + skipcrud, &st2)==0
&& st1.st_dev==st2.st_dev
&& st1.st_ino==st2.st_ino)
break;
msg_perror("Could not link %s to %s",
(longname ? longname : head->header.name) + skipcrud,
longlink ? longlink : longlink,
head->header.linkname);
skipcrud + current_file_name,
current_link_name);
}
break;
#ifdef S_ISLNK
case LF_SYMLINK:
again_symlink:
check = symlink(longlink ? longlink : head->header.linkname,
(longname ? longname : head->header.name) + skipcrud);
check = symlink(current_link_name,
skipcrud + current_file_name);
/* FIXME, don't worry uid, gid, etc... */
if (check == 0)
break;
if (make_dirs((longname ? longname : head->header.name) + skipcrud))
if (make_dirs(current_file_name + skipcrud))
goto again_symlink;
msg_perror("Could not create symlink to %s",
longlink ? longlink : head->header.linkname);
current_link_name);
break;
#endif
@@ -598,16 +571,13 @@ extract_archive()
#endif
#if defined(S_IFCHR) || defined(S_IFBLK)
make_node:
check = mknod((longname ? longname: head->header.name) + skipcrud,
check = mknod(current_file_name + skipcrud,
(int) hstat.st_mode, (int) hstat.st_rdev);
if (check != 0) {
if (make_dirs((longname
? longname
: head->header.name) + skipcrud))
if (make_dirs(skipcrud + current_file_name))
goto make_node;
msg_perror("Could not make %s",
(longname ? longname : head->header.name)
+ skipcrud);
current_file_name + skipcrud);
break;
};
goto set_filestat;
@@ -617,13 +587,13 @@ extract_archive()
/* If local system doesn't support FIFOs, use default case */
case LF_FIFO:
make_fifo:
check = mkfifo((longname ? longname : head->header.name) + skipcrud,
check = mkfifo(current_file_name + skipcrud,
(int) hstat.st_mode);
if (check != 0) {
if (make_dirs((longname ? longname : head->header.name) + skipcrud))
if (make_dirs(current_file_name + skipcrud))
goto make_fifo;
msg_perror("Could not make %s",
(longname ? longname : head->header.name) + skipcrud);
skipcrud + current_file_name);
break;
};
goto set_filestat;
@@ -631,15 +601,12 @@ extract_archive()
case LF_DIR:
case LF_DUMPDIR:
namelen = strlen(longname ? longname : head->header.name)
+ skipcrud - 1;
namelen = strlen(current_file_name) + skipcrud - 1;
really_dir:
/* Check for trailing /, and zap as many as we find. */
while (namelen
&& (longname
? longname
: head->header.name)[skipcrud+namelen] == '/')
(longname ? longname : head->header.name)[skipcrud+namelen--] = '\0';
&& current_file_name[skipcrud+namelen] == '/')
current_file_name[skipcrud+namelen--] = '\0';
if(f_gnudump) { /* Read the entry and delete files
that aren't listed in the archive */
gnu_restore(skipcrud);
@@ -649,23 +616,23 @@ extract_archive()
again_dir:
check = mkdir(skipcrud+(longname ? longname : head->header.name),
check = mkdir(skipcrud+current_file_name,
(we_are_root ? 0 : 0300) | (int)hstat.st_mode);
if (check != 0) {
struct stat st1;
if (make_dirs(skipcrud+(longname ? longname : head->header.name)))
if (make_dirs(skipcrud+current_file_name))
goto again_dir;
/* If we're trying to create '.', let it be. */
if ((longname ? longname : head->header.name)[skipcrud+namelen] == '.' &&
if (current_file_name[skipcrud+namelen] == '.' &&
(namelen==0 ||
(longname ? longname : head->header.name)[skipcrud+namelen-1]=='/'))
current_file_name[skipcrud+namelen-1]=='/'))
goto check_perms;
if( errno==EEXIST
&& stat(skipcrud+(longname ? longname : head->header.name),&st1)==0
&& stat(skipcrud+current_file_name,&st1)==0
&& (S_ISDIR(st1.st_mode)))
break;
msg_perror("Could not create directory %s",skipcrud+(longname ? longname : head->header.name));
msg_perror("Could not create directory %s",skipcrud+current_file_name);
break;
}
@@ -673,14 +640,14 @@ extract_archive()
if (!we_are_root && 0300 != (0300 & (int) hstat.st_mode)) {
hstat.st_mode |= 0300;
msg("Added write and execute permission to directory %s",
skipcrud+(longname ? longname : head->header.name));
skipcrud+current_file_name);
}
if (f_modified)
goto set_filestat;
tmp = (struct saved_dir_info *) malloc (sizeof (struct saved_dir_info));
tmp->path = malloc (strlen (skipcrud + (longname ? longname : head->header.name)) + 1);
strcpy (tmp->path, skipcrud + (longname ? longname : head->header.name));
tmp->path = malloc (strlen (skipcrud + current_file_name) + 1);
strcpy (tmp->path, skipcrud + current_file_name);
tmp->mode = hstat.st_mode;
tmp->atime = hstat.st_atime;
tmp->mtime = hstat.st_mtime;
@@ -688,7 +655,7 @@ extract_archive()
saved_dir_info_head = tmp;
case LF_VOLHDR:
if(f_verbose) {
printf("Reading %s\n",longname ? longname : head->header.name);
printf("Reading %s\n", current_file_name);
}
break;
@@ -697,48 +664,17 @@ extract_archive()
break;
case LF_MULTIVOL:
msg("Can't extract '%s'--file is continued from another volume\n",head->header.name);
msg("Can't extract '%s'--file is continued from another volume\n",current_file_name);
skip_file((long)hstat.st_size);
break;
case LF_LONGNAME:
longp = &longname;
goto extract_long;
case LF_LONGLINK:
longp = &longlink;
extract_long:
if (*longp)
free (*longp);
bp = *longp = (char *) ck_malloc (hstat.st_size);
for (size = hstat.st_size;
size > 0;
size -= written)
{
data = findrec ()->charptr;
if (data == NULL)
{
msg ("Unexpected EOF on archive file");
break;
}
written = endofrecs () ->charptr - data;
if (written > size)
written = size;
bcopy (data, bp, written);
bp += written;
userec ((union record *) (data + written - 1));
}
msg ("Visible long name error\n");
skip_file ((long)hstat.st_size);
break;
}
if (bumplongs)
{
longname = 0;
longlink = 0;
}
/* We don't need to save it any longer. */
saverec((union record **) 0); /* Unsave it */
}