int copy_file(const char *source, const char *dest, int flags)
{
struct stat source_stat;
struct stat dest_stat;
int dest_exists = 0;
int status = 0;
if ((!(flags & FILEUTILS_DEREFERENCE) &&
lstat(source, &source_stat) < 0) ||
((flags & FILEUTILS_DEREFERENCE) &&
stat(source, &source_stat) < 0)) {
bb_perror_msg("%s", source);
return -1;
}
if (lstat(dest, &dest_stat) < 0) {
if (errno != ENOENT) {
bb_perror_msg("unable to stat `%s'", dest);
return -1;
}
} else {
if (source_stat.st_dev == dest_stat.st_dev &&
source_stat.st_ino == dest_stat.st_ino)
{
bb_error_msg("`%s' and `%s' are the same file", source, dest);
return -1;
}
dest_exists = 1;
}
if (S_ISDIR(source_stat.st_mode)) {
DIR *dp;
struct dirent *d;
mode_t saved_umask = 0;
if (!(flags & FILEUTILS_RECUR)) {
bb_error_msg("%s: omitting directory", source);
return -1;
}
/* Create DEST. */
if (dest_exists) {
if (!S_ISDIR(dest_stat.st_mode)) {
bb_error_msg("`%s' is not a directory", dest);
return -1;
}
} else {
mode_t mode;
saved_umask = umask(0);
mode = source_stat.st_mode;
if (!(flags & FILEUTILS_PRESERVE_STATUS))
mode = source_stat.st_mode & ~saved_umask;
mode |= S_IRWXU;
if (mkdir(dest, mode) < 0) {
umask(saved_umask);
bb_perror_msg("cannot create directory `%s'", dest);
return -1;
}
umask(saved_umask);
}
/* Recursively copy files in SOURCE. */
if ((dp = bb_opendir(source)) == NULL) {
status = -1;
goto preserve_status;
}
while ((d = readdir(dp)) != NULL) {
char *new_source, *new_dest;
new_source = concat_subpath_file(source, d->d_name);
if(new_source == NULL)
continue;
new_dest = concat_path_file(dest, d->d_name);
if (copy_file(new_source, new_dest, flags) < 0)
status = -1;
free(new_source);
free(new_dest);
}
/* closedir have only EBADF error, but "dp" not changes */
closedir(dp);
if (!dest_exists &&
chmod(dest, source_stat.st_mode & ~saved_umask) < 0) {
bb_perror_msg("unable to change permissions of `%s'", dest);
status = -1;
}
} else if (S_ISREG(source_stat.st_mode) ||
(S_ISLNK(source_stat.st_mode) && (flags & FILEUTILS_DEREFERENCE)))
{
int src_fd;
int dst_fd;
if (ENABLE_FEATURE_PRESERVE_HARDLINKS) {
char *link_name;
if (!(flags & FILEUTILS_DEREFERENCE) &&
is_in_ino_dev_hashtable(&source_stat, &link_name)) {
if (link(link_name, dest) < 0) {
bb_perror_msg("unable to link `%s'", dest);
return -1;
}
return 0;
}
add_to_ino_dev_hashtable(&source_stat, dest);
}
src_fd = open(source, O_RDONLY);
if (src_fd == -1) {
bb_perror_msg("unable to open `%s'", source);
return(-1);
}
if (dest_exists) {
if (flags & FILEUTILS_INTERACTIVE) {
fprintf(stderr, "%s: overwrite `%s'? ", bb_applet_name, dest);
if (!bb_ask_confirmation()) {
close (src_fd);
return 0;
}
}
dst_fd = open(dest, O_WRONLY|O_TRUNC);
if (dst_fd == -1) {
if (!(flags & FILEUTILS_FORCE)) {
bb_perror_msg("unable to open `%s'", dest);
close(src_fd);
return -1;
}
if (unlink(dest) < 0) {
bb_perror_msg("unable to remove `%s'", dest);
close(src_fd);
return -1;
}
goto dest_removed;
}
} else {
dest_removed:
dst_fd = open(dest, O_WRONLY|O_CREAT, source_stat.st_mode);
if (dst_fd == -1) {
bb_perror_msg("unable to open `%s'", dest);
close(src_fd);
return(-1);
}
}
if (bb_copyfd_eof(src_fd, dst_fd) == -1)
status = -1;
if (close(dst_fd) < 0) {
bb_perror_msg("unable to close `%s'", dest);
status = -1;
}
if (close(src_fd) < 0) {
bb_perror_msg("unable to close `%s'", source);
status = -1;
}
} else if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode) ||
S_ISSOCK(source_stat.st_mode) || S_ISFIFO(source_stat.st_mode) ||
S_ISLNK(source_stat.st_mode)) {
if (dest_exists) {
if((flags & FILEUTILS_FORCE) == 0) {
fprintf(stderr, "`%s' exists\n", dest);
return -1;
}
if(unlink(dest) < 0) {
bb_perror_msg("unable to remove `%s'", dest);
return -1;
}
}
if (S_ISFIFO(source_stat.st_mode)) {
if (mkfifo(dest, source_stat.st_mode) < 0) {
bb_perror_msg("cannot create fifo `%s'", dest);
return -1;
}
} else if (S_ISLNK(source_stat.st_mode)) {
char *lpath;
lpath = xreadlink(source);
if (symlink(lpath, dest) < 0) {
bb_perror_msg("cannot create symlink `%s'", dest);
return -1;
}
free(lpath);
if (flags & FILEUTILS_PRESERVE_STATUS)
if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
bb_perror_msg("unable to preserve ownership of `%s'", dest);
return 0;
} else {
if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
bb_perror_msg("unable to create `%s'", dest);
return -1;
}
}
} else {
bb_error_msg("internal error: unrecognized file type");
return -1;
}
preserve_status:
if (flags & FILEUTILS_PRESERVE_STATUS) {
struct utimbuf times;
char *msg="unable to preserve %s of `%s'";
times.actime = source_stat.st_atime;
times.modtime = source_stat.st_mtime;
if (utime(dest, ×) < 0)
bb_perror_msg(msg, "times", dest);
if (chown(dest, source_stat.st_uid, source_stat.st_gid) < 0) {
source_stat.st_mode &= ~(S_ISUID | S_ISGID);
bb_perror_msg(msg, "ownership", dest);
}
if (chmod(dest, source_stat.st_mode) < 0)
bb_perror_msg(msg, "permissions", dest);
}
return status;
}
/*
* Walk down all the directories under the specified
* location, and do something (something specified
* by the fileAction and dirAction function pointers).
*
* Unfortunately, while nftw(3) could replace this and reduce
* code size a bit, nftw() wasn't supported before GNU libc 2.1,
* and so isn't sufficiently portable to take over since glibc2.1
* is so stinking huge.
*/
int recursive_action(const char *fileName,
int recurse, int followLinks, int depthFirst,
int (*fileAction) (const char *fileName,
struct stat * statbuf,
void* userData),
int (*dirAction) (const char *fileName,
struct stat * statbuf,
void* userData),
void* userData)
{
int status;
struct stat statbuf;
struct dirent *next;
if (followLinks)
status = stat(fileName, &statbuf);
else
status = lstat(fileName, &statbuf);
if (status < 0) {
#ifdef DEBUG_RECURS_ACTION
bb_error_msg("status=%d followLinks=%d TRUE=%d",
status, followLinks, TRUE);
#endif
bb_perror_msg("%s", fileName);
return FALSE;
}
if (! followLinks && (S_ISLNK(statbuf.st_mode))) {
if (fileAction == NULL)
return TRUE;
else
return fileAction(fileName, &statbuf, userData);
}
if (! recurse) {
if (S_ISDIR(statbuf.st_mode)) {
if (dirAction != NULL)
return (dirAction(fileName, &statbuf, userData));
else
return TRUE;
}
}
if (S_ISDIR(statbuf.st_mode)) {
DIR *dir;
if (dirAction != NULL && ! depthFirst) {
status = dirAction(fileName, &statbuf, userData);
if (! status) {
bb_perror_msg("%s", fileName);
return FALSE;
} else if (status == SKIP)
return TRUE;
}
dir = bb_opendir(fileName);
if (!dir) {
return FALSE;
}
status = TRUE;
while ((next = readdir(dir)) != NULL) {
char *nextFile;
nextFile = concat_subpath_file(fileName, next->d_name);
if(nextFile == NULL)
continue;
if (! recursive_action(nextFile, TRUE, followLinks, depthFirst,
fileAction, dirAction, userData)) {
status = FALSE;
}
free(nextFile);
}
closedir(dir);
if (dirAction != NULL && depthFirst) {
if (! dirAction(fileName, &statbuf, userData)) {
bb_perror_msg("%s", fileName);
return FALSE;
}
}
if (! status)
return FALSE;
} else {
if (fileAction == NULL)
return TRUE;
else
return fileAction(fileName, &statbuf, userData);
}
return TRUE;
}