/* directory */
int
tar_extract_dir(TAR *t, char *realname)
{
mode_t mode;
char *filename;
if (!TH_ISDIR(t))
{
errno = EINVAL;
return -1;
}
filename = (realname ? realname : th_get_pathname(t));
mode = th_get_mode(t);
if (mkdirhier(dirname(filename)) == -1)
return -1;
#ifdef DEBUG
printf(" ==> extracting: %s (mode %04o, directory)\n", filename,
mode);
#endif
if (mkdir(filename, mode) == -1)
{
if (errno == EEXIST)
{
if (chmod(filename, mode) == -1)
{
#ifdef DEBUG
perror("chmod()");
#endif
return -1;
}
else
{
#ifdef DEBUG
puts(" *** using existing directory");
#endif
return 1;
}
}
else
{
#ifdef DEBUG
perror("mkdir()");
#endif
return -1;
}
}
return 0;
}
/* encode file path */
void
th_set_path(TAR *t, char *pathname)
{
char suffix[2] = "";
char *tmp;
#ifdef DEBUG
printf("in th_set_path(th, pathname=\"%s\")\n", pathname);
#endif
if (t->th_buf.gnu_longname != NULL)
free(t->th_buf.gnu_longname);
t->th_buf.gnu_longname = NULL;
if (pathname[strlen(pathname) - 1] != '/' && TH_ISDIR(t))
strcpy(suffix, "/");
if (strlen(pathname) >= T_NAMELEN && (t->options & TAR_GNU))
{
/* GNU-style long name */
t->th_buf.gnu_longname = strdup(pathname);
strncpy(t->th_buf.name, t->th_buf.gnu_longname, T_NAMELEN);
}
else if (strlen(pathname) >= T_NAMELEN)
{
/* POSIX-style prefix field */
tmp = strchr(&(pathname[strlen(pathname) - T_NAMELEN - 1]), '/');
if (tmp == NULL)
{
printf("!!! '/' not found in \"%s\"\n", pathname);
return;
}
snprintf(t->th_buf.name, 100, "%s%s", &(tmp[1]), suffix);
snprintf(t->th_buf.prefix,
((tmp - pathname + 1) <
155 ? (tmp - pathname + 1) : 155), "%s", pathname);
}
else
/* classic tar format */
snprintf(t->th_buf.name, 100, "%s%s", pathname, suffix);
#ifdef DEBUG
puts("returning from th_set_path()...");
#endif
}
static int
tar_set_file_perms(TAR *t, char *realname)
{
mode_t mode;
uid_t uid;
gid_t gid;
struct utimbuf ut;
char *filename;
filename = (realname ? realname : th_get_pathname(t));
mode = th_get_mode(t);
uid = th_get_uid(t);
gid = th_get_gid(t);
ut.modtime = ut.actime = th_get_mtime(t);
/* change owner/group */
if (geteuid() == 0)
#ifdef HAVE_LCHOWN
if (lchown(filename, uid, gid) == -1)
{
# ifdef DEBUG
fprintf(stderr, "lchown(\"%s\", %d, %d): %s\n",
filename, uid, gid, strerror(errno));
# endif
#else /* ! HAVE_LCHOWN */
if (!TH_ISSYM(t) && chown(filename, uid, gid) == -1)
{
# ifdef DEBUG
fprintf(stderr, "chown(\"%s\", %d, %d): %s\n",
filename, uid, gid, strerror(errno));
# endif
#endif /* HAVE_LCHOWN */
return -1;
}
/* change access/modification time */
if (!TH_ISSYM(t) && utime(filename, &ut) == -1)
{
#ifdef DEBUG
perror("utime()");
#endif
return -1;
}
/* change permissions */
if (!TH_ISSYM(t) && chmod(filename, mode) == -1)
{
#ifdef DEBUG
perror("chmod()");
#endif
return -1;
}
return 0;
}
/* switchboard */
int
tar_extract_file(TAR *t, char *realname)
{
int i;
char *lnp;
int pathname_len;
int realname_len;
if (t->options & TAR_NOOVERWRITE)
{
struct stat s;
if (lstat(realname, &s) == 0 || errno != ENOENT)
{
errno = EEXIST;
return -1;
}
}
if (TH_ISDIR(t))
{
i = tar_extract_dir(t, realname);
if (i == 1)
i = 0;
}
else if (TH_ISLNK(t))
i = tar_extract_hardlink(t, realname);
else if (TH_ISSYM(t))
i = tar_extract_symlink(t, realname);
else if (TH_ISCHR(t))
i = tar_extract_chardev(t, realname);
else if (TH_ISBLK(t))
i = tar_extract_blockdev(t, realname);
else if (TH_ISFIFO(t))
i = tar_extract_fifo(t, realname);
else /* if (TH_ISREG(t)) */
i = tar_extract_regfile(t, realname);
if (i != 0)
return i;
i = tar_set_file_perms(t, realname);
if (i != 0)
return i;
pathname_len = strlen(th_get_pathname(t)) + 1;
realname_len = strlen(realname) + 1;
lnp = (char *)calloc(1, pathname_len + realname_len);
if (lnp == NULL)
return -1;
strcpy(&lnp[0], th_get_pathname(t));
strcpy(&lnp[pathname_len], realname);
#ifdef DEBUG
printf("tar_extract_file(): calling libtar_hash_add(): key=\"%s\", "
"value=\"%s\"\n", th_get_pathname(t), realname);
#endif
if (libtar_hash_add(t->h, lnp) != 0)
return -1;
return 0;
}
static int
tar_set_file_perms(TAR *t, char *realname)
{
mode_t mode;
uid_t uid;
gid_t gid;
struct utimbuf ut;
char *filename;
filename = (realname ? realname : th_get_pathname(t));
mode = th_get_mode(t);
uid = th_get_uid(t);
gid = th_get_gid(t);
ut.modtime = ut.actime = th_get_mtime(t);
#ifdef DEBUG
printf(" ==> setting perms: %s (mode %04o, uid %d, gid %d)\n",
filename, mode, uid, gid);
#endif
/* change owner/group */
if (geteuid() == 0)
#ifdef HAVE_LCHOWN
if (lchown(filename, uid, gid) == -1)
{
# ifdef DEBUG
fprintf(stderr, "lchown(\"%s\", %d, %d): %s\n",
filename, uid, gid, strerror(errno));
# endif
#else /* ! HAVE_LCHOWN */
if (!TH_ISSYM(t) && chown(filename, uid, gid) == -1)
{
# ifdef DEBUG
fprintf(stderr, "chown(\"%s\", %d, %d): %s\n",
filename, uid, gid, strerror(errno));
# endif
#endif /* HAVE_LCHOWN */
return -1;
}
/* change access/modification time */
if (!TH_ISSYM(t) && utime(filename, &ut) == -1)
{
#ifdef DEBUG
perror("utime()");
#endif
return -1;
}
/* change permissions */
if (!TH_ISSYM(t) && chmod(filename, mode) == -1)
{
#ifdef DEBUG
perror("chmod()");
#endif
return -1;
}
return 0;
}
/* switchboard */
int
tar_extract_file(TAR *t, char *realname, char *prefix, const int *progress_fd)
{
int i;
char *lnp;
int pathname_len;
int realname_len;
if (t->options & TAR_NOOVERWRITE)
{
struct stat s;
if (lstat(realname, &s) == 0 || errno != ENOENT)
{
errno = EEXIST;
return -1;
}
}
if (TH_ISDIR(t))
{
printf("dir\n");
i = tar_extract_dir(t, realname);
if (i == 1)
i = 0;
}
else if (TH_ISLNK(t)) {
printf("link\n");
i = tar_extract_hardlink(t, realname, prefix);
}
else if (TH_ISSYM(t)) {
printf("sym\n");
i = tar_extract_symlink(t, realname);
}
else if (TH_ISCHR(t)) {
printf("chr\n");
i = tar_extract_chardev(t, realname);
}
else if (TH_ISBLK(t)) {
printf("blk\n");
i = tar_extract_blockdev(t, realname);
}
else if (TH_ISFIFO(t)) {
printf("fifo\n");
i = tar_extract_fifo(t, realname);
}
else /* if (TH_ISREG(t)) */ {
printf("reg\n");
i = tar_extract_regfile(t, realname, progress_fd);
}
if (i != 0) {
printf("FAILED RESTORE OF FILE i: %s\n", realname);
return i;
}
i = tar_set_file_perms(t, realname);
if (i != 0) {
printf("FAILED SETTING PERMS: %d\n", i);
return i;
}
#ifdef HAVE_SELINUX
if((t->options & TAR_STORE_SELINUX) && t->th_buf.selinux_context != NULL)
{
#ifdef DEBUG
printf(" Restoring SELinux context %s to file %s\n", t->th_buf.selinux_context, realname);
#endif
if (lsetfilecon(realname, t->th_buf.selinux_context) < 0) {
fprintf(stderr, "Failed to restore SELinux context %s!\n", strerror(errno));
}
}
#endif
/*
pathname_len = strlen(th_get_pathname(t)) + 1;
realname_len = strlen(realname) + 1;
lnp = (char *)calloc(1, pathname_len + realname_len);
if (lnp == NULL)
return -1;
strcpy(&lnp[0], th_get_pathname(t));
strcpy(&lnp[pathname_len], realname);
#ifdef DEBUG
printf("tar_extract_file(): calling libtar_hash_add(): key=\"%s\", "
"value=\"%s\"\n", th_get_pathname(t), realname);
#endif
if (libtar_hash_add(t->h, lnp) != 0)
return -1;
free(lnp);
*/
return 0;
}
