/* 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)) { FILE *sfp, *dfp=NULL; #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 if ((sfp = bb_wfopen(source, "r")) == NULL) { return -1; } if (dest_exists) { if (flags & FILEUTILS_INTERACTIVE) { fprintf(stderr, "%s: overwrite `%s'? ", bb_applet_name, dest); if (!bb_ask_confirmation()) { fclose (sfp); return 0; } } if ((dfp = fopen(dest, "w")) == NULL) { if (!(flags & FILEUTILS_FORCE)) { bb_perror_msg("unable to open `%s'", dest); fclose (sfp); return -1; } if (unlink(dest) < 0) { bb_perror_msg("unable to remove `%s'", dest); fclose (sfp); return -1; } dest_exists = 0; } } if (!dest_exists) { int fd; if ((fd = open(dest, O_WRONLY|O_CREAT, source_stat.st_mode)) < 0 || (dfp = fdopen(fd, "w")) == NULL) { if (fd >= 0) close(fd); bb_perror_msg("unable to open `%s'", dest); fclose (sfp); return -1; } } if (bb_copyfd(fileno(sfp), fileno(dfp), 0) == -1) status = -1; if (fclose(dfp) < 0) { bb_perror_msg("unable to close `%s'", dest); status = -1; } if (fclose(sfp) < 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 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, ×) < 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; }