/* $NetBSD: utils.c,v 1.29 2005/10/15 18:22:18 christos Exp $ */ /*- * Copyright (c) 1991, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #if 0 #ifndef lint #if 0 static char sccsid[] = "@(#)utils.c 8.3 (Berkeley) 4/1/94"; #else __RCSID("$NetBSD: utils.c,v 1.29 2005/10/15 18:22:18 christos Exp $"); #endif #endif /* not lint */ #endif #if 0 #include #endif #include #include #include #include #include "err.h" #include #include #include "fts.h" #include #include #include #include #include #include "extern-cp.h" #define lchmod chmod #define lchown chown #define cp_pct(x, y) ((y == 0) ? 0 : (int)(100.0 * (x) / (y))) int set_utimes(const char *file, struct stat *fs) { struct utimbuf tv; tv.actime = fs->st_atime; tv.modtime = fs->st_mtime; if (utime(file, &tv)) { warn("lutimes: %s", file); return (1); } return (0); } int copy_file(rtems_shell_cp_globals* cp_globals RTEMS_UNUSED, FTSENT *entp, int dne) { #define MAX_READ max_read int max_read; char* buf; struct stat *fs; ssize_t wcount; size_t wresid; off_t wtotal; int ch, checkch, from_fd = 0, rcount, rval, to_fd = 0; char *bufp; #ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED char *p; #endif fs = entp->fts_statp; max_read = fs->st_blksize; if (max_read < (8 * 1024)) max_read = 8 * 1024; buf = malloc (max_read); if (!buf) { warn("no memory"); return (1); } if ((from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) { warn("%s", entp->fts_path); (void)free(buf); return (1); } /* * If the file exists and we're interactive, verify with the user. * If the file DNE, set the mode to be the from file, minus setuid * bits, modified by the umask; arguably wrong, but it makes copying * executables work right and it's been that way forever. (The * other choice is 666 or'ed with the execute bits on the from file * modified by the umask.) */ if (!dne) { #define YESNO "(y/n [n]) " if (nflag) { if (vflag) printf("%s not overwritten\n", to.p_path); (void)close(from_fd); (void)free(buf); return (0); } else if (iflag) { (void)fprintf(stderr, "overwrite %s? %s", to.p_path, YESNO); checkch = ch = getchar(); while (ch != '\n' && ch != EOF) ch = getchar(); if (checkch != 'y' && checkch != 'Y') { (void)close(from_fd); (void)free(buf); (void)fprintf(stderr, "not overwritten\n"); return (1); } } if (fflag) { /* remove existing destination file name, * create a new file */ (void)unlink(to.p_path); if (!lflag) to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT, fs->st_mode & ~(S_ISUID | S_ISGID)); } else { if (!lflag) /* overwrite existing destination file name */ to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0); } } else { if (!lflag) to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT, fs->st_mode & ~(S_ISUID | S_ISGID)); } if (to_fd == -1) { warn("%s", to.p_path); (void)close(from_fd); (void)free(buf); return (1); } rval = 0; if (!lflag) { /* * Mmap and write if less than 8M (the limit is so we don't totally * trash memory on big files. This is really a minor hack, but it * wins some CPU back. */ #ifdef CCJ_REMOVED_VM_AND_BUFFER_CACHE_SYNCHRONIZED if (S_ISREG(fs->st_mode) && fs->st_size > 0 && fs->st_size <= 8 * 1048576) { if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ, MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) { warn("%s", entp->fts_path); rval = 1; } else { wtotal = 0; for (bufp = p, wresid = fs->st_size; ; bufp += wcount, wresid -= (size_t)wcount) { wcount = write(to_fd, bufp, wresid); if (wcount <= 0) break; wtotal += wcount; if (info) { info = 0; (void)fprintf(stderr, "%s -> %s %3d%%\n", entp->fts_path, to.p_path, cp_pct(wtotal, fs->st_size)); } if (wcount >= (ssize_t)wresid) break; } if (wcount != (ssize_t)wresid) { warn("%s", to.p_path); rval = 1; } /* Some systems don't unmap on close(2). */ if (munmap(p, fs->st_size) < 0) { warn("%s", entp->fts_path); rval = 1; } } } else #endif { wtotal = 0; while ((rcount = read(from_fd, buf, MAX_READ)) > 0) { for (bufp = buf, wresid = rcount; ; bufp += wcount, wresid -= wcount) { wcount = write(to_fd, bufp, wresid); if (wcount <= 0) break; wtotal += wcount; if (info) { info = 0; (void)fprintf(stderr, "%s -> %s %3d%%\n", entp->fts_path, to.p_path, cp_pct(wtotal, fs->st_size)); } if (wcount >= (ssize_t)wresid) break; } if (wcount != (ssize_t)wresid) { warn("%s", to.p_path); rval = 1; break; } } if (rcount < 0) { warn("%s", entp->fts_path); rval = 1; } } } else { if (link(entp->fts_path, to.p_path)) { warn("%s", to.p_path); rval = 1; } } (void)close(from_fd); /* * Don't remove the target even after an error. The target might * not be a regular file, or its attributes might be important, * or its contents might be irreplaceable. It would only be safe * to remove it if we created it and its length is 0. */ if (!lflag) { if (pflag && setfile(cp_globals, fs, to_fd)) rval = 1; if (pflag && preserve_fd_acls(from_fd, to_fd) != 0) rval = 1; (void)close(from_fd); if (close(to_fd)) { warn("%s", to.p_path); rval = 1; } } (void)free(buf); return (rval); } int copy_link(rtems_shell_cp_globals* cp_globals, FTSENT *p, int exists) { ssize_t len; char llink[PATH_MAX]; if ((len = readlink(p->fts_path, llink, sizeof(llink) - 1)) == -1) { warn("readlink: %s", p->fts_path); return (1); } llink[len] = '\0'; if (exists && unlink(to.p_path)) { warn("unlink: %s", to.p_path); return (1); } if (symlink(llink, to.p_path)) { warn("symlink: %s", llink); return (1); } return (pflag ? setfile(cp_globals, p->fts_statp, -1) : 0); } int copy_fifo(rtems_shell_cp_globals* cp_globals, struct stat *from_stat, int exists) { if (exists && unlink(to.p_path)) { warn("unlink: %s", to.p_path); return (1); } if (mkfifo(to.p_path, from_stat->st_mode)) { warn("mkfifo: %s", to.p_path); return (1); } return (pflag ? setfile(cp_globals, from_stat, -1) : 0); } int copy_special(rtems_shell_cp_globals* cp_globals, struct stat *from_stat, int exists) { if (exists && unlink(to.p_path)) { warn("unlink: %s", to.p_path); return (1); } if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) { warn("mknod: %s", to.p_path); return (1); } return (pflag ? setfile(cp_globals, from_stat, -1) : 0); } #if defined(__rtems__) /* * Newlib's has the real BSD definition of this macro * and it does not behave the same as this one. Thus we need to undefine * the BSD standard one and use the one expected by this file. */ #undef TIMESPEC_TO_TIMEVAL #endif #define TIMESPEC_TO_TIMEVAL(tv, ts) { \ (tv)->tv_sec = *(ts); \ (tv)->tv_usec = 0; \ } #define st_atimespec st_atime #define st_mtimespec st_mtime #define lutimes utimes int setfile(rtems_shell_cp_globals* cp_globals, struct stat *fs, int fd) { static struct timeval tv[2]; struct stat ts; int rval, gotstat, islink, fdval; rval = 0; fdval = fd != -1; islink = !fdval && S_ISLNK(fs->st_mode); fs->st_mode &= S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO; TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec); TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec); #if 0 if (islink ? lutimes(to.p_path, tv) : utimes(to.p_path, tv)) { warn("%sutimes: %s", islink ? "l" : "", to.p_path); rval = 1; } #endif if (fdval ? fstat(fd, &ts) : (islink ? lstat(to.p_path, &ts) : stat(to.p_path, &ts))) gotstat = 0; else { gotstat = 1; ts.st_mode &= S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO; } /* * Changing the ownership probably won't succeed, unless we're root * or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting * the mode; current BSD behavior is to remove all setuid bits on * chown. If chown fails, lose setuid/setgid bits. */ if (!gotstat || fs->st_uid != ts.st_uid || fs->st_gid != ts.st_gid) if (fdval ? fchown(fd, fs->st_uid, fs->st_gid) : (islink ? lchown(to.p_path, fs->st_uid, fs->st_gid) : chown(to.p_path, fs->st_uid, fs->st_gid))) { if (errno != EPERM) { warn("chown: %s", to.p_path); rval = 1; } fs->st_mode &= ~(S_ISUID | S_ISGID); } if (!gotstat || fs->st_mode != ts.st_mode) if (fdval ? fchmod(fd, fs->st_mode) : (islink ? lchmod(to.p_path, fs->st_mode) : chmod(to.p_path, fs->st_mode))) { warn("chmod: %s", to.p_path); rval = 1; } #if 0 if (!gotstat || fs->st_flags != ts.st_flags) if (fdval ? fchflags(fd, fs->st_flags) : (islink ? (errno = ENOSYS) : chflags(to.p_path, fs->st_flags))) { warn("chflags: %s", to.p_path); rval = 1; } #endif return (rval); } int preserve_fd_acls(int source_fd RTEMS_UNUSED, int dest_fd RTEMS_UNUSED) { #if 0 struct acl *aclp; acl_t acl; if (fpathconf(source_fd, _PC_ACL_EXTENDED) != 1 || fpathconf(dest_fd, _PC_ACL_EXTENDED) != 1) return (0); acl = acl_get_fd(source_fd); if (acl == NULL) { warn("failed to get acl entries while setting %s", to.p_path); return (1); } aclp = &acl->ats_acl; if (aclp->acl_cnt == 3) return (0); if (acl_set_fd(dest_fd, acl) < 0) { warn("failed to set acl entries for %s", to.p_path); return (1); } #endif return (0); } int preserve_dir_acls(struct stat *fs RTEMS_UNUSED, char *source_dir RTEMS_UNUSED, char *dest_dir RTEMS_UNUSED) { #if 0 acl_t (*aclgetf)(const char *, acl_type_t); int (*aclsetf)(const char *, acl_type_t, acl_t); struct acl *aclp; acl_t acl; if (pathconf(source_dir, _PC_ACL_EXTENDED) != 1 || pathconf(dest_dir, _PC_ACL_EXTENDED) != 1) return (0); /* * If the file is a link we will not follow it */ if (S_ISLNK(fs->st_mode)) { aclgetf = acl_get_link_np; aclsetf = acl_set_link_np; } else { aclgetf = acl_get_file; aclsetf = acl_set_file; } /* * Even if there is no ACL_TYPE_DEFAULT entry here, a zero * size ACL will be returned. So it is not safe to simply * check the pointer to see if the default ACL is present. */ acl = aclgetf(source_dir, ACL_TYPE_DEFAULT); if (acl == NULL) { warn("failed to get default acl entries on %s", source_dir); return (1); } aclp = &acl->ats_acl; if (aclp->acl_cnt != 0 && aclsetf(dest_dir, ACL_TYPE_DEFAULT, acl) < 0) { warn("failed to set default acl entries on %s", dest_dir); return (1); } acl = aclgetf(source_dir, ACL_TYPE_ACCESS); if (acl == NULL) { warn("failed to get acl entries on %s", source_dir); return (1); } aclp = &acl->ats_acl; if (aclsetf(dest_dir, ACL_TYPE_ACCESS, acl) < 0) { warn("failed to set acl entries on %s", dest_dir); return (1); } #endif return (0); } void usage(rtems_shell_cp_globals* cp_globals) { (void)fprintf(stderr, "%s\n%s\n", "usage: cp [-R [-H | -L | -P]] [-f | -i | -n] [-alpv] source_file target_file", " cp [-R [-H | -L | -P]] [-f | -i | -n] [-alpv] source_file ... " "target_directory"); longjmp (cp_globals->exit_jmp, 1); }