1 files changed, 268 insertions, 0 deletions

diff --git a/busybox/libbb/copy_file.c b/busybox/libbb/copy_file.c
new file mode 100644
index 000000000..68a1ded04
--- /dev/null
+++ b/busybox/libbb/copy_file.c
@@ -0,0 +1,268 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini copy_file implementation for busybox
+ *
+ * Copyright (C) 2001 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <utime.h>
+#include <errno.h>
+#include <dirent.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "busybox.h"
+
+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 = opendir(source)) == NULL) {
+                        bb_perror_msg("unable to open directory `%s'", source);
+                        status = -1;
+                        goto end;
+                }
+
+                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)) {
+                int src_fd;
+                int dst_fd;
+#ifdef CONFIG_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;
+                }
+#endif
+                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) {
+                                bb_error_msg("overwrite `%s'? ", 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;
+                                }
+
+                                dest_exists = 0;
+                        }
+                }
+
+                if (!dest_exists) {
+                        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 &&
+                       ((flags & FILEUTILS_FORCE) == 0 || unlink(dest) < 0)) {
+                                bb_perror_msg("unable to remove `%s'", dest);
+                                return -1;
+
+                        }
+        } else {
+                bb_error_msg("internal error: unrecognized file type");
+                return -1;
+                }
+        if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode) ||
+            S_ISSOCK(source_stat.st_mode)) {
+                if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
+                        bb_perror_msg("unable to create `%s'", dest);
+                        return -1;
+                }
+        } else 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 (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
+                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);
+#endif
+
+#ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
+                add_to_ino_dev_hashtable(&source_stat, dest);
+#endif
+
+                return 0;
+        }
+
+#ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
+        if (! S_ISDIR(source_stat.st_mode)) {
+                add_to_ino_dev_hashtable(&source_stat, dest);
+        }
+#endif
+
+end:
+
+        if (flags & FILEUTILS_PRESERVE_STATUS) {
+                struct utimbuf times;
+
+                times.actime = source_stat.st_atime;
+                times.modtime = source_stat.st_mtime;
+                if (utime(dest, &times) < 0)
+                        bb_perror_msg("unable to preserve times of `%s'", dest);
+                if (chown(dest, source_stat.st_uid, source_stat.st_gid) < 0) {
+                        source_stat.st_mode &= ~(S_ISUID | S_ISGID);
+                        bb_perror_msg("unable to preserve ownership of `%s'", dest);
+                }
+                if (chmod(dest, source_stat.st_mode) < 0)
+                        bb_perror_msg("unable to preserve permissions of `%s'", dest);
+        }
+
+        return status;
+}