1 files changed, 285 insertions, 0 deletions
diff --git a/bin/cp/utils.c b/bin/cp/utils.c
new file mode 100644
index 000000000000..5a5edcbfb03f
--- /dev/null
+++ b/bin/cp/utils.c
@@ -0,0 +1,285 @@
+/*-
+ * 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.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)utils.c	8.3 (Berkeley) 4/1/94";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <fts.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "extern.h"
+
+int
+copy_file(entp, dne)
+	FTSENT *entp;
+	int dne;
+{
+	static char buf[MAXBSIZE];
+	struct stat to_stat, *fs;
+	int ch, checkch, from_fd, rcount, rval, to_fd, wcount;
+#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
+	char *p;
+#endif
+	
+	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) {
+		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);
+	} else
+		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;
+
+	/*
+	 * 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) {
+			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;
+		}
+	}
+
+	/* If the copy went bad, lose the file. */
+	if (rval == 1) {
+		(void)unlink(to.p_path);
+		(void)close(from_fd);
+		(void)close(to_fd);
+		return (1);
+	}
+
+	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;
+	}
+	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);
+	}
+	return (0);
+}
+
+int
+copy_fifo(from_stat, exists)
+	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, 0) : 0);
+}
+
+int
+copy_special(from_stat, exists)
+	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, 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_IRWXU | S_IRWXG | S_IRWXO;
+
+	TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
+	TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);
+	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 (fd ?
+	    fchflags(fd, fs->st_flags) : chflags(to.p_path, fs->st_flags)) {
+		warn("chflags: %s", to.p_path);
+		rval = 1;
+	}
+	return (rval);
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr, "%s\n%s\n",
+"usage: cp [-R [-H | -L | -P] [-fip] src target",
+"       cp [-R [-H | -L | -P] [-fip] src1 ... srcN directory");
+	exit(1);
+}