From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001 From: Cameron Katri Date: Sun, 9 May 2021 14:20:58 -0400 Subject: Import macOS userland adv_cmds-176 basic_cmds-55 bootstrap_cmds-116.100.1 developer_cmds-66 diskdev_cmds-667.40.1 doc_cmds-53.60.1 file_cmds-321.40.3 mail_cmds-35 misc_cmds-34 network_cmds-606.40.1 patch_cmds-17 remote_cmds-63 shell_cmds-216.60.1 system_cmds-880.60.2 text_cmds-106 --- file_cmds/cp/cp.c | 571 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 571 insertions(+) create mode 100644 file_cmds/cp/cp.c (limited to 'file_cmds/cp/cp.c') diff --git a/file_cmds/cp/cp.c b/file_cmds/cp/cp.c new file mode 100644 index 0000000..c856fd9 --- /dev/null +++ b/file_cmds/cp/cp.c @@ -0,0 +1,571 @@ +/*- + * Copyright (c) 1988, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * David Hitz of Auspex Systems Inc. + * + * 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. + */ + +#if 0 +#ifndef lint +static char const copyright[] = +"@(#) Copyright (c) 1988, 1993, 1994\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)cp.c 8.2 (Berkeley) 4/1/94"; +#endif /* not lint */ +#endif +#include +__FBSDID("$FreeBSD: src/bin/cp/cp.c,v 1.52 2005/09/05 04:36:08 csjp Exp $"); + +/* + * Cp copies source files to target files. + * + * The global PATH_T structure "to" always contains the path to the + * current target file. Since fts(3) does not change directories, + * this path can be either absolute or dot-relative. + * + * The basic algorithm is to initialize "to" and use fts(3) to traverse + * the file hierarchy rooted in the argument list. A trivial case is the + * case of 'cp file1 file2'. The more interesting case is the case of + * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the + * path (relative to the root of the traversal) is appended to dir (stored + * in "to") to form the final target path. + */ + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef __APPLE__ +#include +#include +#else /* !__APPLE__ */ +#define COMPAT_MODE(a,b) (1) +#endif /* __APPLE__ */ + +#include "extern.h" + +#define STRIP_TRAILING_SLASH(p) { \ + while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \ + *--(p).p_end = 0; \ +} + +static char emptystring[] = ""; + +PATH_T to = { to.p_path, emptystring, "" }; + +int fflag, iflag, nflag, pflag, vflag; +#ifdef __APPLE__ +int Xflag; +#endif /* __APPLE__ */ +static int Rflag, rflag; + int cflag = 0; +volatile sig_atomic_t info; + +enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE }; + +static int copy(char *[], enum op, int); +static void siginfo(int __unused); + +int +main(int argc, char *argv[]) +{ + struct stat to_stat, tmp_stat; + enum op type; + int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash; + char *target; + + Hflag = Lflag = Pflag = 0; + while ((ch = getopt(argc, argv, "cHLPRXafinprv")) != -1) + switch (ch) { + case 'c': + cflag = 1; + break; + case 'H': + Hflag = 1; + Lflag = Pflag = 0; + break; + case 'L': + Lflag = 1; + Hflag = Pflag = 0; + break; + case 'P': + Pflag = 1; + Hflag = Lflag = 0; + break; + case 'R': + Rflag = 1; + break; + case 'X': + Xflag = 1; + break; + case 'f': + fflag = 1; + /* Determine if the STD is SUSv3 or Legacy */ + if (COMPAT_MODE("bin/cp", "unix2003")) + nflag = 0; /* reset nflag, but not iflag */ + else + iflag = nflag = 0; /* reset both */ + break; + case 'i': + iflag = 1; + if (COMPAT_MODE("bin/cp", "unix2003")) + nflag = 0; /* reset nflag, but not fflag */ + else + fflag = nflag = 0; + break; + case 'n': + nflag = 1; + fflag = iflag = 0; + break; + case 'p': + pflag = 1; + break; + case 'r': + rflag = 1; + break; + case 'v': + vflag = 1; + break; + case 'a': + pflag = 1; + Pflag = 1; + Rflag = 1; + break; + default: + usage(); + break; + } + argc -= optind; + argv += optind; + + if (argc < 2) + usage(); + + if (cflag && Xflag) { + errx(1, "the -c and -X options may not be specified together"); + } + + fts_options = FTS_NOCHDIR | FTS_PHYSICAL; + if (rflag) { + if (Rflag) + errx(1, + "the -R and -r options may not be specified together."); + if (Hflag || Lflag || Pflag) + errx(1, + "the -H, -L, and -P options may not be specified with the -r option."); + fts_options &= ~FTS_PHYSICAL; + fts_options |= FTS_LOGICAL; + } + if (Rflag) { + if (Hflag) + fts_options |= FTS_COMFOLLOW; + if (Lflag) { + fts_options &= ~FTS_PHYSICAL; + fts_options |= FTS_LOGICAL; + } + } else { + fts_options &= ~FTS_PHYSICAL; + fts_options |= FTS_LOGICAL | FTS_COMFOLLOW; + } + (void)signal(SIGINFO, siginfo); + + /* Save the target base in "to". */ + target = argv[--argc]; + if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path)) + errx(1, "%s: name too long", target); + to.p_end = to.p_path + strlen(to.p_path); + if (to.p_path == to.p_end) { + *to.p_end++ = '.'; + *to.p_end = 0; + } + have_trailing_slash = (to.p_end[-1] == '/'); + if (have_trailing_slash) + STRIP_TRAILING_SLASH(to); + to.target_end = to.p_end; + + /* Set end of argument list for fts(3). */ + argv[argc] = NULL; + + /* + * Cp has two distinct cases: + * + * cp [-R] source target + * cp [-R] source1 ... sourceN directory + * + * In both cases, source can be either a file or a directory. + * + * In (1), the target becomes a copy of the source. That is, if the + * source is a file, the target will be a file, and likewise for + * directories. + * + * In (2), the real target is not directory, but "directory/source". + */ + r = stat(to.p_path, &to_stat); + if (r == -1 && errno != ENOENT) + err(1, "%s", to.p_path); + if (r == -1 || !S_ISDIR(to_stat.st_mode)) { + /* + * Case (1). Target is not a directory. + */ + if (argc > 1) { + usage(); + exit(1); + } + /* + * Need to detect the case: + * cp -R dir foo + * Where dir is a directory and foo does not exist, where + * we want pathname concatenations turned on but not for + * the initial mkdir(). + */ + if (r == -1) { + if (rflag || (Rflag && (Lflag || Hflag))) + stat(*argv, &tmp_stat); + else + lstat(*argv, &tmp_stat); + + if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag)) + type = DIR_TO_DNE; + else + type = FILE_TO_FILE; + } else + type = FILE_TO_FILE; + + if (have_trailing_slash && type == FILE_TO_FILE) { + if (r == -1) + errx(1, "directory %s does not exist", + to.p_path); + else + errx(1, "%s is not a directory", to.p_path); + } + } else + /* + * Case (2). Target is a directory. + */ + type = FILE_TO_DIR; + + exit (copy(argv, type, fts_options)); +} + +static int +copy(char *argv[], enum op type, int fts_options) +{ + struct stat to_stat; + FTS *ftsp; + FTSENT *curr; + int base = 0, dne, badcp, rval; + size_t nlen; + char *p, *target_mid; + mode_t mask, mode; + + /* + * Keep an inverted copy of the umask, for use in correcting + * permissions on created directories when not using -p. + */ + mask = ~umask(0777); + umask(~mask); + + if ((ftsp = fts_open(argv, fts_options, NULL)) == NULL) + err(1, "fts_open"); + for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) { + switch (curr->fts_info) { + case FTS_NS: + case FTS_DNR: + case FTS_ERR: + warnx("%s: %s", + curr->fts_path, strerror(curr->fts_errno)); + rval = 1; + continue; + case FTS_DC: /* Warn, continue. */ + warnx("%s: directory causes a cycle", curr->fts_path); + rval = 1; + continue; + default: + ; + } +#ifdef __APPLE__ + +#ifdef __clang__ +#pragma clang diagnostic push +/* clang doesn't like fts_name[1], but we know better... */ +#pragma clang diagnostic ignored "-Warray-bounds" +#endif + /* Skip ._ when using copyfile and exists */ + if ((pflag || !Xflag) && (curr->fts_level != FTS_ROOTLEVEL) && + (curr->fts_namelen > 2) && /* ._\0 is not AppleDouble */ + (curr->fts_name[0] == '.') && (curr->fts_name[1] == '_')) { +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + struct stat statbuf; + char path[PATH_MAX]; + char *p = strrchr(curr->fts_path, '/'); + if (p) { + size_t s = p + 2 - curr->fts_path; + if (s > sizeof(path)) s = sizeof(path); + strlcpy(path, curr->fts_path, s); + strlcat(path, curr->fts_name+2, sizeof(path)); + } else { + strlcpy(path, curr->fts_name+2, sizeof(path)); + } + if (!lstat(path, &statbuf)) { + continue; + } + } +#endif /* __APPLE__ */ + /* + * If we are in case (2) or (3) above, we need to append the + * source name to the target name. + */ + if (type != FILE_TO_FILE) { + /* + * Need to remember the roots of traversals to create + * correct pathnames. If there's a directory being + * copied to a non-existent directory, e.g. + * cp -R a/dir noexist + * the resulting path name should be noexist/foo, not + * noexist/dir/foo (where foo is a file in dir), which + * is the case where the target exists. + * + * Also, check for "..". This is for correct path + * concatenation for paths ending in "..", e.g. + * cp -R .. /tmp + * Paths ending in ".." are changed to ".". This is + * tricky, but seems the easiest way to fix the problem. + * + * XXX + * Since the first level MUST be FTS_ROOTLEVEL, base + * is always initialized. + */ + if (curr->fts_level == FTS_ROOTLEVEL) { + if (type != DIR_TO_DNE) { + p = strrchr(curr->fts_path, '/'); + base = (p == NULL) ? 0 : + (int)(p - curr->fts_path + 1); + + if (!strcmp(&curr->fts_path[base], + "..")) + base += 1; + } else + base = curr->fts_pathlen; + } + + p = &curr->fts_path[base]; + nlen = curr->fts_pathlen - base; + target_mid = to.target_end; + if (*p != '/' && target_mid[-1] != '/') + *target_mid++ = '/'; + *target_mid = 0; + if (target_mid - to.p_path + nlen >= PATH_MAX) { + warnx("%s%s: name too long (not copied)", + to.p_path, p); + rval = 1; + continue; + } + (void)strncat(target_mid, p, nlen); + to.p_end = target_mid + nlen; + *to.p_end = 0; + STRIP_TRAILING_SLASH(to); + } + + if (curr->fts_info == FTS_DP) { + /* + * We are nearly finished with this directory. If we + * didn't actually copy it, or otherwise don't need to + * change its attributes, then we are done. + */ + if (!curr->fts_number) + continue; + /* + * If -p is in effect, set all the attributes. + * Otherwise, set the correct permissions, limited + * by the umask. Optimise by avoiding a chmod() + * if possible (which is usually the case if we + * made the directory). Note that mkdir() does not + * honour setuid, setgid and sticky bits, but we + * normally want to preserve them on directories. + */ + if (pflag) { + if (setfile(curr->fts_statp, -1)) + rval = 1; +#ifdef __APPLE__ + /* setfile will fail if writeattr is denied */ + if (copyfile(curr->fts_path, to.p_path, NULL, COPYFILE_ACL)<0) + warn("%s: unable to copy ACL to %s", curr->fts_path, to.p_path); +#else /* !__APPLE__ */ + if (preserve_dir_acls(curr->fts_statp, + curr->fts_accpath, to.p_path) != 0) + rval = 1; +#endif /* __APPLE__ */ + } else { + mode = curr->fts_statp->st_mode; + if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) || + ((mode | S_IRWXU) & mask) != (mode & mask)) + if (chmod(to.p_path, mode & mask) != 0){ + warn("chmod: %s", to.p_path); + rval = 1; + } + } + continue; + } + + /* Not an error but need to remember it happened */ + if (stat(to.p_path, &to_stat) == -1) + dne = 1; + else { + if (to_stat.st_dev == curr->fts_statp->st_dev && + to_stat.st_ino == curr->fts_statp->st_ino) { + warnx("%s and %s are identical (not copied).", + to.p_path, curr->fts_path); + rval = 1; + if (S_ISDIR(curr->fts_statp->st_mode)) + (void)fts_set(ftsp, curr, FTS_SKIP); + continue; + } + if (!S_ISDIR(curr->fts_statp->st_mode) && + S_ISDIR(to_stat.st_mode)) { + warnx("cannot overwrite directory %s with " + "non-directory %s", + to.p_path, curr->fts_path); + rval = 1; + continue; + } + dne = 0; + } + + switch (curr->fts_statp->st_mode & S_IFMT) { + case S_IFLNK: + /* Catch special case of a non-dangling symlink */ + if ((fts_options & FTS_LOGICAL) || + ((fts_options & FTS_COMFOLLOW) && + curr->fts_level == 0)) { + if (copy_file(curr, dne)) + badcp = rval = 1; + } else { + if (copy_link(curr, !dne)) + badcp = rval = 1; + } + break; + case S_IFDIR: + if (!Rflag && !rflag) { + warnx("%s is a directory (not copied).", + curr->fts_path); + (void)fts_set(ftsp, curr, FTS_SKIP); + badcp = rval = 1; + break; + } + /* + * If the directory doesn't exist, create the new + * one with the from file mode plus owner RWX bits, + * modified by the umask. Trade-off between being + * able to write the directory (if from directory is + * 555) and not causing a permissions race. If the + * umask blocks owner writes, we fail.. + */ + if (dne) { + if (mkdir(to.p_path, + curr->fts_statp->st_mode | S_IRWXU) < 0) { + if (COMPAT_MODE("bin/cp", "unix2003")) { + warn("%s", to.p_path); + } else { + err(1, "%s", to.p_path); + } + } + } else if (!S_ISDIR(to_stat.st_mode)) { + errno = ENOTDIR; + if (COMPAT_MODE("bin/cp", "unix2003")) { + warn("%s", to.p_path); + } else { + err(1, "%s", to.p_path); + } + } + /* + * Arrange to correct directory attributes later + * (in the post-order phase) if this is a new + * directory, or if the -p flag is in effect. + */ + curr->fts_number = pflag || dne; +#ifdef __APPLE__ + if (!Xflag) { + if (copyfile(curr->fts_path, to.p_path, NULL, COPYFILE_XATTR) < 0) + warn("%s: unable to copy extended attributes to %s", curr->fts_path, to.p_path); + /* ACL and mtime set in postorder traversal */ + } +#endif /* __APPLE__ */ + break; + case S_IFBLK: + case S_IFCHR: + if (Rflag) { + if (copy_special(curr->fts_statp, !dne)) + badcp = rval = 1; + } else { + if (copy_file(curr, dne)) + badcp = rval = 1; + } + break; + case S_IFIFO: + if (Rflag) { + if (copy_fifo(curr->fts_statp, !dne)) + badcp = rval = 1; + } else { + if (copy_file(curr, dne)) + badcp = rval = 1; + } + break; + default: + if (copy_file(curr, dne)) + badcp = rval = 1; + break; + } + if (vflag && !badcp) + (void)printf("%s -> %s\n", curr->fts_path, to.p_path); + } + if (errno) + err(1, "fts_read"); + fts_close(ftsp); + return (rval); +} + +static void +siginfo(int sig __unused) +{ + + info = 1; +} -- cgit v1.2.3-56-ge451