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-rw-r--r--file_cmds/cp/utils.c541
1 files changed, 541 insertions, 0 deletions
diff --git a/file_cmds/cp/utils.c b/file_cmds/cp/utils.c
new file mode 100644
index 0000000..af05cc3
--- /dev/null
+++ b/file_cmds/cp/utils.c
@@ -0,0 +1,541 @@
+/*-
+ * 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.
+ * 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.
+ */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)utils.c 8.3 (Berkeley) 4/1/94";
+#endif
+#endif /* not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/bin/cp/utils.c,v 1.46 2005/09/05 04:36:08 csjp Exp $");
+
+#include <sys/types.h>
+#include <sys/acl.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
+#include <sys/mman.h>
+#endif
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <fts.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sysexits.h>
+#include <unistd.h>
+#include <locale.h>
+
+#ifdef __APPLE__
+#include <sys/time.h>
+#include <copyfile.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <get_compat.h>
+#include <sys/attr.h>
+#include <sys/clonefile.h>
+#else
+#define COMPAT_MODE(a,b) (1)
+#endif /* __APPLE__ */
+
+#include "extern.h"
+#define cp_pct(x,y) (int)(100.0 * (double)(x) / (double)(y))
+
+int
+copy_file(const FTSENT *entp, int dne)
+{
+ static char buf[MAXBSIZE];
+ struct stat *fs;
+ int ch, checkch, from_fd, rval, to_fd;
+ ssize_t rcount;
+ ssize_t wcount;
+ size_t wresid;
+ off_t wtotal;
+ char *bufp;
+ char resp[] = {'\0', '\0'};
+#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
+ char *p;
+#endif
+ mode_t mode = 0;
+ struct stat to_stat;
+
+ 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) {
+#define YESNO "(y/n [n]) "
+ if (nflag) {
+ if (vflag)
+ printf("%s not overwritten\n", to.p_path);
+ (void)close(from_fd);
+ return (1);
+ } else if (iflag) {
+ (void)fprintf(stderr, "overwrite %s? %s",
+ to.p_path, YESNO);
+
+ /* Load user specified locale */
+ setlocale(LC_MESSAGES, "");
+
+ checkch = ch = getchar();
+ while (ch != '\n' && ch != EOF)
+ ch = getchar();
+
+ /* only care about the first character */
+ resp[0] = checkch;
+
+ if (rpmatch(resp) != 1) {
+ (void)close(from_fd);
+ (void)fprintf(stderr, "not overwritten\n");
+ return (1);
+ }
+ }
+
+ if (cflag) {
+ (void)unlink(to.p_path);
+ int error = clonefile(entp->fts_path, to.p_path, 0);
+ if (error)
+ warn("%s: clonefile failed", to.p_path);
+ (void)close(from_fd);
+ return error == 0 ? 0 : 1;
+ }
+
+ if (COMPAT_MODE("bin/cp", "unix2003")) {
+ /* first try to overwrite existing destination file name */
+ to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0);
+ if (to_fd == -1) {
+ if (fflag) {
+ /* Only if it fails remove file and create a new one */
+ (void)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 (fflag) {
+ /* remove existing destination file name,
+ * create a new file */
+ (void)unlink(to.p_path);
+ to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
+ fs->st_mode & ~(S_ISUID | S_ISGID));
+ } else
+ /* overwrite existing destination file name */
+ to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0);
+ }
+ } else {
+
+ if (cflag) {
+ int error = clonefile(entp->fts_path, to.p_path, 0);
+ if (error)
+ warn("%s: clonefile failed", to.p_path);
+ (void)close(from_fd);
+ return error == 0 ? 0 : 1;
+ }
+
+ 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);
+ return (1);
+ }
+
+ rval = 0;
+
+#ifdef __APPLE__
+ if (S_ISREG(fs->st_mode)) {
+ struct statfs sfs;
+
+ /*
+ * Pre-allocate blocks for the destination file if it
+ * resides on Xsan.
+ */
+ if (fstatfs(to_fd, &sfs) == 0 &&
+ strcmp(sfs.f_fstypename, "acfs") == 0) {
+ fstore_t fst;
+
+ fst.fst_flags = 0;
+ fst.fst_posmode = F_PEOFPOSMODE;
+ fst.fst_offset = 0;
+ fst.fst_length = fs->st_size;
+
+ (void) fcntl(to_fd, F_PREALLOCATE, &fst);
+ }
+ }
+#endif /* __APPLE__ */
+
+ if (fstat(to_fd, &to_stat) != -1) {
+ mode = to_stat.st_mode;
+ if ((mode & (S_IRWXG|S_IRWXO))
+ && fchmod(to_fd, mode & ~(S_IRWXG|S_IRWXO))) {
+ if (errno != EPERM) /* we have write access but do not own the file */
+ warn("%s: fchmod failed", to.p_path);
+ mode = 0;
+ }
+ } else {
+ warn("%s", to.p_path);
+ }
+ /*
+ * 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 (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);
+ 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 || wcount <= 0)
+ 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, MAXBSIZE)) > 0) {
+ for (bufp = buf, wresid = rcount; ;
+ bufp += wcount, wresid -= wcount) {
+ wcount = write(to_fd, bufp, wresid);
+ 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 || wcount <= 0)
+ break;
+ }
+ if (wcount != (ssize_t)wresid) {
+ 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 irreplaceable. It would only be safe
+ * to remove it if we created it and its length is 0.
+ */
+ if (mode != 0)
+ if (fchmod(to_fd, mode))
+ warn("%s: fchmod failed", to.p_path);
+#ifdef __APPLE__
+ /* do these before setfile in case copyfile changes mtime */
+ if (!Xflag && S_ISREG(fs->st_mode)) { /* skip devices, etc */
+ if (fcopyfile(from_fd, to_fd, NULL, COPYFILE_XATTR) < 0)
+ warn("%s: could not copy extended attributes to %s", entp->fts_path, to.p_path);
+ }
+ if (pflag && setfile(fs, to_fd))
+ rval = 1;
+ if (pflag) {
+ /* If this ACL denies writeattr then setfile will fail... */
+ if (fcopyfile(from_fd, to_fd, NULL, COPYFILE_ACL) < 0)
+ warn("%s: could not copy ACL to %s", entp->fts_path, to.p_path);
+ }
+#else /* !__APPLE__ */
+ if (pflag && setfile(fs, to_fd))
+ rval = 1;
+ if (pflag && preserve_fd_acls(from_fd, to_fd) != 0)
+ rval = 1;
+#endif /* __APPLE__ */
+ (void)close(from_fd);
+ if (close(to_fd)) {
+ warn("%s", to.p_path);
+ rval = 1;
+ }
+ return (rval);
+}
+
+int
+copy_link(const 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);
+ }
+#ifdef __APPLE__
+ if (!Xflag)
+ if (copyfile(p->fts_path, to.p_path, NULL, COPYFILE_XATTR | COPYFILE_NOFOLLOW_SRC) <0)
+ warn("%s: could not copy extended attributes to %s",
+ p->fts_path, to.p_path);
+#endif
+ return (pflag ? setfile(p->fts_statp, -1) : 0);
+}
+
+int
+copy_fifo(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(from_stat, -1) : 0);
+}
+
+int
+copy_special(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(from_stat, -1) : 0);
+}
+
+int
+setfile(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 (fdval ? futimes(fd, tv) : (islink ? lutimes(to.p_path, tv) : utimes(to.p_path, tv))) {
+ warn("%sutimes: %s", fdval ? "f" : (islink ? "l" : ""), to.p_path);
+ rval = 1;
+ }
+ 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("%schown: %s", fdval ? "f" : (islink ? "l" : ""), 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("%schmod: %s", fdval ? "f" : (islink ? "l" : ""), to.p_path);
+ rval = 1;
+ }
+ }
+
+ if (!gotstat || fs->st_flags != ts.st_flags) {
+ if (fdval ? fchflags(fd, fs->st_flags) : (islink ?
+ lchflags(to.p_path, fs->st_flags) :
+ chflags(to.p_path, fs->st_flags))) {
+ if (errno != EPERM) {
+ warn("%schflags: %s", fdval ? "f" : (islink ? "l" : ""), to.p_path);
+ rval = 1;
+ }
+ }
+ }
+ return (rval);
+}
+
+#ifndef __APPLE__
+int
+preserve_fd_acls(int source_fd, int dest_fd)
+{
+ 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);
+ }
+ return (0);
+}
+
+int
+preserve_dir_acls(struct stat *fs, char *source_dir, char *dest_dir)
+{
+ 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);
+ }
+ return (0);
+}
+#endif /* !__APPLE__ */
+
+void
+usage(void)
+{
+
+ if (COMPAT_MODE("bin/cp", "unix2003")) {
+ (void)fprintf(stderr, "%s\n%s\n",
+"usage: cp [-R [-H | -L | -P]] [-fi | -n] [-apvXc] source_file target_file",
+" cp [-R [-H | -L | -P]] [-fi | -n] [-apvXc] source_file ... "
+"target_directory");
+ } else {
+ (void)fprintf(stderr, "%s\n%s\n",
+"usage: cp [-R [-H | -L | -P]] [-f | -i | -n] [-apvXc] source_file target_file",
+" cp [-R [-H | -L | -P]] [-f | -i | -n] [-apvXc] source_file ... "
+"target_directory");
+ }
+ exit(EX_USAGE);
+}
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