/*- * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. * * $Id: utils.c,v 1.3.4.2 1995/10/05 07:24:24 davidg Exp $ */ #ifndef lint static char sccsid[] = "@(#)utils.c 8.3 (Berkeley) 4/1/94"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include "extern.h" int copy_file(entp, dne) FTSENT *entp; int dne; { #ifndef MAXBSIZE #define MAXBSIZE 4096 #endif static char buf[MAXBSIZE]; struct stat to_stat, *fs; int ch, checkch, from_fd, rcount, rval, to_fd, wcount; char *p; if ((from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) { warn("%s", entp->fts_path); return (1); } fs = entp->fts_statp; /* * 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 || fflag) { if (fflag) unlink(to.p_path); to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT, fs->st_mode & ~(S_ISUID | S_ISGID)); } else { if (iflag) { (void)fprintf(stderr, "overwrite %s? ", to.p_path); checkch = ch = getchar(); while (ch != '\n' && ch != EOF) ch = getchar(); if (checkch != 'y') { (void)close(from_fd); return (0); } } to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0); } if (to_fd == -1) { warn("%s", to.p_path); (void)close(from_fd); return (1);; } rval = 0; /* * 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 VM_AND_BUFFER_CACHE_SYNCHRONIZED if (fs->st_size <= 8 * 1048576) { if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ, 0, from_fd, (off_t)0)) == (char *)-1) { warn("%s", entp->fts_path); rval = 1; } else { if (write(to_fd, p, fs->st_size) != fs->st_size) { 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 { while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) { int isblank = 1; for (p = buf; p < buf+rcount; ++p) if (*p) isblank = 0; if (isblank) lseek(to_fd, (long)rcount, SEEK_CUR); else { wcount = write(to_fd, buf, rcount); if (rcount != wcount || wcount == -1) { warn("%s", to.p_path); rval = 1; break; } } } if (rcount < 0) { warn("%s", entp->fts_path); rval = 1; } } /* * 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 irreplacable. It would only be safe * to remove it if we created it and its length is 0. */ if (pflag && setfile(fs, to_fd)) rval = 1; /* * If the source was setuid or setgid, lose the bits unless the * copy is owned by the same user and group. */ #define RETAINBITS \ (S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO) else if (fs->st_mode & (S_ISUID | S_ISGID) && fs->st_uid == myuid) if (fstat(to_fd, &to_stat)) { warn("%s", to.p_path); rval = 1; } else if (fs->st_gid == to_stat.st_gid && fchmod(to_fd, fs->st_mode & RETAINBITS & ~myumask)) { warn("%s", to.p_path); rval = 1; } (void)close(from_fd); if (close(to_fd)) { warn("%s", to.p_path); rval = 1; } if (rval == 0 && vflag) printf("%s -> %s\n", entp->fts_path, to.p_path); return (rval); } int copy_link(p, exists) FTSENT *p; int exists; { int len; char link[MAXPATHLEN]; if ((len = readlink(p->fts_path, link, sizeof(link))) == -1) { warn("readlink: %s", p->fts_path); return (1); } link[len] = '\0'; if (exists && unlink(to.p_path)) { warn("unlink: %s", to.p_path); return (1); } if (symlink(link, to.p_path)) { warn("symlink: %s", link); return (1); } if (vflag) printf("%s -> %s\n", p->fts_path, to.p_path); return (0); } int copy_fifo(p, from_stat, exists) FTSENT *p; 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); } if (vflag) printf("%s -> %s\n", p->fts_path, to.p_path); return (pflag ? setfile(from_stat, 0) : 0); } int copy_special(p, from_stat, exists) FTSENT *p; 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); } if (vflag) printf("%s -> %s\n", p->fts_path, to.p_path); return (pflag ? setfile(from_stat, 0) : 0); } int setfile(fs, fd) register struct stat *fs; int fd; { static struct timeval tv[2]; int rval; rval = 0; fs->st_mode &= S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO; #if LINUX #define TIME_TO_TIMEVAL(tv, tm) { \ (tv)->tv_sec = tm; \ (tv)->tv_usec = 0; \ } TIME_TO_TIMEVAL(&tv[0], fs->st_atime); TIME_TO_TIMEVAL(&tv[1], fs->st_mtime); #else TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec); TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec); #endif if (utimes(to.p_path, tv)) { warn("utimes: %s", to.p_path); rval = 1; } /* * 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 (fd ? fchown(fd, 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 (fd ? fchmod(fd, fs->st_mode) : chmod(to.p_path, fs->st_mode)) { warn("chown: %s", to.p_path); rval = 1; } #if !LINUX if (fd ? fchflags(fd, fs->st_flags) : chflags(to.p_path, fs->st_flags)) { warn("chflags: %s", to.p_path); rval = 1; } #endif return (rval); } void usage() { (void)fprintf(stderr, "%s\n%s\n", "usage: cp [-RHLPfipv] src target", " cp [-RHLPfipv] src1 ... srcN directory"); exit(1); }