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Diffstat (limited to 'src/kmk/kmkbuiltin/cp_utils.c')
-rw-r--r--src/kmk/kmkbuiltin/cp_utils.c381
1 files changed, 381 insertions, 0 deletions
diff --git a/src/kmk/kmkbuiltin/cp_utils.c b/src/kmk/kmkbuiltin/cp_utils.c
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+++ b/src/kmk/kmkbuiltin/cp_utils.c
@@ -0,0 +1,381 @@
+/*-
+ * 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";
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/bin/cp/utils.c,v 1.43 2004/04/06 20:06:44 markm Exp $");
+#endif
+#endif /* not lint */
+
+#include "config.h"
+#ifndef _MSC_VER
+# include <sys/param.h>
+#endif
+#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 <signal.h>
+#include <sysexits.h>
+#include <unistd.h>
+#ifdef __sun__
+# include "solfakes.h"
+#endif
+#ifdef _MSC_VER
+# define MSC_DO_64_BIT_IO
+# include "mscfakes.h"
+#else
+# include <sys/time.h>
+#endif
+#include "cp_extern.h"
+#include "cmp_extern.h"
+
+#define cp_pct(x,y) (int)(100.0 * (double)(x) / (double)(y))
+
+#ifndef MAXBSIZE
+# define MAXBSIZE 0x20000
+#endif
+#ifndef O_BINARY
+# define O_BINARY 0
+#endif
+
+#ifndef S_ISVTX
+# define S_ISVTX 0
+#endif
+
+
+int
+copy_file(const FTSENT *entp, int dne, int changed_only, int *pcopied)
+{
+ static char buf[MAXBSIZE];
+ struct stat *fs;
+ int ch, checkch, from_fd, rcount, rval, to_fd;
+ ssize_t wcount;
+ size_t wresid;
+ size_t wtotal;
+ char *bufp;
+#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
+ char *p;
+#endif
+
+ *pcopied = 0;
+
+ if ((from_fd = open(entp->fts_path, O_RDONLY | O_BINARY, 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) {
+ /* compare the files first if requested */
+ if (changed_only) {
+ if (cmp_fd_and_file(from_fd, entp->fts_path, to.p_path,
+ 1 /* silent */, 0 /* lflag */,
+ 0 /* special */) == OK_EXIT) {
+ close(from_fd);
+ return (0);
+ }
+ if (lseek(from_fd, 0, SEEK_SET) != 0) {
+ close(from_fd);
+ if ((from_fd = open(entp->fts_path, O_RDONLY | O_BINARY, 0)) == -1) {
+ warn("%s", entp->fts_path);
+ return (1);
+ }
+ }
+ }
+
+#define YESNO "(y/n [n]) "
+ if (nflag) {
+ if (vflag)
+ printf("%s not overwritten\n", to.p_path);
+ 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)fprintf(stderr, "not overwritten\n");
+ return (1);
+ }
+ }
+
+ 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 | O_BINARY,
+ fs->st_mode & ~(S_ISUID | S_ISGID));
+ } else
+ /* overwrite existing destination file name */
+ to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_BINARY, 0);
+ } else
+ to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT | O_BINARY,
+ fs->st_mode & ~(S_ISUID | S_ISGID));
+
+ if (to_fd == -1) {
+ warn("%s", to.p_path);
+ (void)close(from_fd);
+ return (1);
+ }
+
+ rval = 0;
+ *pcopied = 1;
+
+ /*
+ * 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 (pflag && setfile(fs, to_fd))
+ rval = 1;
+ (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)
+{
+ int 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(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;
+
+#ifdef HAVE_ST_TIMESPEC
+ TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
+ TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);
+#else
+ tv[0].tv_sec = fs->st_atime;
+ tv[1].tv_sec = fs->st_mtime;
+ tv[0].tv_usec = tv[1].tv_usec = 0;
+#endif
+ if (islink ? lutimes(to.p_path, tv) : utimes(to.p_path, tv)) {
+ warn("%sutimes: %s", 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("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;
+ }
+
+#ifdef HAVE_ST_FLAGS
+ 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);
+}
+
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