home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1988 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.
- * 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.
- */
-
- #ifdef DF_POSIX /* DF_MSS */
- #include <misc.h>
- #include <bsdlib.h>
- #endif
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1988 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)cp.c 5.24 (Berkeley) 5/6/91";
- #endif /* not lint */
-
- /*
- * cp copies source files to target files.
- *
- * The global PATH_T structures "to" and "from" always contain paths to the
- * current source and target files, respectively. Since cp does not change
- * directories, these paths can be either absolute or dot-realative.
- *
- * The basic algorithm is to initialize "to" and "from", and then call the
- * recursive copy() function to do the actual work. If "from" is a file,
- * copy copies the data. If "from" is a directory, copy creates the
- * corresponding "to" directory, and calls itself recursively on all of
- * the entries in the "from" directory.
- */
- #ifdef _POSIX_SOURCE
- #else
- #include <sys/param.h>
- #endif
- #include <sys/stat.h>
- #ifdef _POSIX_SOURCE
- #include <time.h>
- #else
- #include <sys/time.h>
- #endif
- #include <dirent.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "cp.h"
-
- PATH_T from = { from.p_path, "" };
- PATH_T to = { to.p_path, "" };
-
- uid_t myuid;
- int exit_val;
- mode_t myumask;
- int iflag, pflag, orflag, rflag;
- int (*statfcn) __P((const char *, struct stat *));
- char *buf, *progname;
-
- void copy __P((void));
- void copy_file __P((struct stat *, int));
- void copy_dir __P((void));
- void copy_link __P((int));
- void copy_fifo __P((struct stat *, int));
- void copy_special __P((struct stat *, int));
- void setfile __P((register struct stat *, int));
- void error __P((const char *));
- void usage __P((void));
-
- #if WIN_NT
- extern int globulate __P((int, int, char **));
- extern void deglobulate __P((void));
- extern int globulated_argc;
- extern char **globulated_argv;
- pid_t ppid;
- int globulation;
- #endif
-
- int
- #if __STDC__
- main (int argc, char **argv)
- #else
- main(argc, argv)
- int argc;
- char **argv;
- #endif
- {
- extern int optind;
- struct stat to_stat;
- register int c, r;
- #if WIN_NT
- #else
- int symfollow, lstat(), stat();
- #endif
- char *old_to, *p;
-
- /*
- * The utility cp(1) is used by mv(1) -- except for usage statements,
- * print the "called as" program name.
- */
- #if WIN_NT
- ppid = getppid();
- if (ppid == (pid_t) 1) /* if parent is CMD.EXE */
- {
- globulation = globulate(1, argc, argv);
- if (globulation == 0)
- {
- argc = globulated_argc;
- argv = globulated_argv;
- # if 0
- for (c = 0; c < argc; ++c)
- (void) printf("[%s] ", argv[c]);
- (void) printf("NULL\n");
- # endif
- }
- }
- #endif
- progname = ((p = rindex(*argv,'/')) != NULL) ? ++p : *argv;
-
- #if WIN_NT
- #else
- symfollow = 0;
- #endif
- while ((c = getopt(argc, argv, "Rfipr")) != EOF) {
- switch ((char)c) {
- case 'f':
- iflag = 0;
- break;
- #if WIN_NT
- #else
- case 'h':
- symfollow = 1;
- break;
- #endif
- case 'i':
- iflag = isatty(fileno(stdin));
- break;
- case 'p':
- pflag = 1;
- break;
- case 'R':
- rflag = 1;
- break;
- case 'r':
- orflag = 1;
- break;
- case '?':
- default:
- usage();
- break;
- }
- }
- argc -= optind;
- argv += optind;
-
- if (argc < 2)
- usage();
-
- if (rflag && orflag) {
- (void)fprintf(stderr,
- "cp: the -R and -r options are mutually exclusive.\n");
- #if WIN_NT
- if (ppid == (pid_t) 1 && globulation == 0)
- deglobulate();
- #endif
- exit(EXIT_FAILURE);
- }
-
- buf = (char *)malloc(MAXBSIZE);
- if (!buf) {
- (void)fprintf(stderr, "%s: out of space.\n", progname);
- #if WIN_NT
- if (ppid == (pid_t) 1 && globulation == 0)
- deglobulate();
- #endif
- exit(EXIT_FAILURE);
- }
-
- myuid = getuid();
-
- /* copy the umask for explicit mode setting */
- myumask = umask(0);
- (void)umask(myumask);
-
- /* consume last argument first. */
- if (!path_set(&to, argv[--argc])) {
- #if WIN_NT
- if (ppid == (pid_t) 1 && globulation == 0)
- deglobulate();
- #endif
- exit(EXIT_FAILURE);
- }
-
- #if WIN_NT
- statfcn = stat;
- #else
- statfcn = symfollow || !rflag ? stat : lstat;
- #endif
-
- /*
- * Cp has two distinct cases:
- *
- * % cp [-rip] source target
- * % cp [-rip] source1 ... 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) {
- #if 0
- (void) fprintf(stderr, "#1\n");
- #endif
- error(to.p_path);
- #if WIN_NT
- if (ppid == (pid_t) 1 && globulation == 0)
- deglobulate();
- #endif
- exit(EXIT_FAILURE);
- }
- if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
- /*
- * Case (1). Target is not a directory.
- */
- if (argc > 1)
- usage();
- if (!path_set(&from, *argv)) {
- #if WIN_NT
- if (ppid == (pid_t) 1 && globulation == 0)
- deglobulate();
- #endif
- exit(EXIT_FAILURE);
- }
- copy();
- }
- else {
- /*
- * Case (2). Target is a directory.
- */
- for (;; ++argv) {
- if (!path_set(&from, *argv)) {
- exit_val = EXIT_FAILURE;
- continue;
- }
- old_to = path_append(&to, path_basename(&from), -1);
- if (!old_to) {
- exit_val = EXIT_FAILURE;
- continue;
- }
- copy();
- if (!--argc)
- break;
- path_restore(&to, old_to);
- }
- }
- #if WIN_NT
- if (ppid == (pid_t) 1 && globulation == 0)
- deglobulate();
- #endif
- return exit_val;
- }
-
- /* copy file or directory at "from" to "to". */
- void
- #if __STDC__
- copy (void)
- #else
- copy()
- #endif
- {
- struct stat from_stat, to_stat;
- int dne, statval;
-
- statval = statfcn(from.p_path, &from_stat);
- if (statval == -1) {
- #if 0
- (void) fprintf(stderr, "#2\n");
- #endif
- error(from.p_path);
- return;
- }
-
- /* 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 == from_stat.st_dev &&
- to_stat.st_ino == from_stat.st_ino) {
- (void)fprintf(stderr,
- "%s: %s and %s are identical (not copied).\n",
- progname, to.p_path, from.p_path);
- exit_val = EXIT_FAILURE;
- return;
- }
- dne = 0;
- }
-
- switch(from_stat.st_mode & S_IFMT) {
- #ifndef _POSIX_SOURCE /* DF_MSS */
- case S_IFLNK:
- copy_link(!dne);
- return;
- #endif
- case S_IFDIR:
- if (!rflag && !orflag) {
- (void)fprintf(stderr,
- "%s: %s is a directory (not copied).\n",
- progname, from.p_path);
- exit_val = EXIT_FAILURE;
- return;
- }
- if (dne) {
- /*
- * 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 cp fails.
- */
- if (mkdir(to.p_path, from_stat.st_mode|S_IRWXU) < 0) {
- #if 0
- (void) fprintf(stderr, "#3\n");
- #endif
- error(to.p_path);
- return;
- }
- }
- else if (!S_ISDIR(to_stat.st_mode) != S_IFDIR) {
- (void)fprintf(stderr, "%s: %s: not a directory.\n",
- progname, to.p_path);
- return;
- }
- copy_dir();
- /*
- * If not -p and directory didn't exist, set it to be the
- * same as the from directory, umodified by the umask;
- * arguably wrong, but it's been that way forever.
- */
- if (pflag)
- setfile(&from_stat, 0);
- else if (dne)
- (void)chmod(to.p_path, from_stat.st_mode);
- return;
- case S_IFCHR:
- case S_IFBLK:
- if (rflag) {
- copy_special(&from_stat, !dne);
- return;
- }
- break;
- case S_IFIFO:
- if (rflag) {
- copy_fifo(&from_stat, !dne);
- return;
- }
- break;
- }
- copy_file(&from_stat, dne);
- }
-
- void
- #if __STDC__
- copy_file (struct stat *fs, int dne)
- #else
- copy_file(fs, dne)
- struct stat *fs;
- int dne;
- #endif
- {
- register int from_fd, to_fd, rcount, wcount;
- struct stat to_stat;
-
- if ((from_fd = open(from.p_path, O_RDONLY, 0)) == -1) {
- #if 0
- (void) fprintf(stderr, "#4\n");
- #endif
- error(from.p_path);
- return;
- }
-
- /*
- * 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 0
- (void) fprintf(stderr, "dne: %d; to.p_path: \"%s\"; fs->st_mode: %lo\n",
- dne, to.p_path, (unsigned long) (fs->st_mode & ~(S_ISUID|S_ISGID)));
- #endif
- if (!dne) {
- if (iflag) {
- int checkch, ch;
-
- (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;
- }
- }
- to_fd = open(to.p_path, O_WRONLY|O_TRUNC, 0);
- } else
- to_fd = open(to.p_path, O_WRONLY|O_CREAT|O_TRUNC,
- fs->st_mode & ~(S_ISUID|S_ISGID));
-
- if (to_fd == -1) {
- #if 0
- int saved_errno;
-
- saved_errno = errno;
- (void) fprintf(stderr, "#5; errno: %d\n", saved_errno);
- #endif
- error(to.p_path);
- (void)close(from_fd);
- return;
- }
-
- while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
- wcount = write(to_fd, buf, rcount);
- if (rcount != wcount || wcount == -1) {
- #if 0
- (void) fprintf(stderr, "#6\n");
- #endif
- error(to.p_path);
- break;
- }
- }
- if (rcount < 0) {
- #if 0
- (void) fprintf(stderr, "#7\n");
- #endif
- error(from.p_path);
- }
- if (pflag)
- setfile(fs, to_fd);
- /*
- * If the source was setuid or setgid, lose the bits unless the
- * copy is owned by the same user and group.
- */
- else if (fs->st_mode & (S_ISUID|S_ISGID) && fs->st_uid == myuid)
- if (fstat(to_fd, &to_stat)) {
- #if 0
- (void) fprintf(stderr, "#8\n");
- #endif
- error(to.p_path);
- }
- #ifdef _POSIX_SOURCE /* DF_MSS */
- #define RETAINBITS (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
- #else
- #define RETAINBITS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)
- #endif
- #ifdef _POSIX_SOURCE /* DF_MSS */
- else if (fs->st_gid == to_stat.st_gid && chmod(to.p_path,
- fs->st_mode & RETAINBITS & ~myumask)) {
- #else
- else if (fs->st_gid == to_stat.st_gid && fchmod(to_fd,
- fs->st_mode & RETAINBITS & ~myumask)) {
- #endif
- #if 0
- (void) fprintf(stderr, "#9\n");
- #endif
- error(to.p_path);
- }
- (void)close(from_fd);
- if (close(to_fd)) {
- #if 0
- (void) fprintf(stderr, "#10\n");
- #endif
- error(to.p_path);
- }
- }
-
- void
- #if __STDC__
- copy_dir (void)
- #else
- copy_dir()
- #endif
- {
- struct stat from_stat;
- struct dirent *dp, **dir_list;
- register int dir_cnt, i;
- char *old_from, *old_to;
-
- dir_cnt = scandir(from.p_path, &dir_list, NULL, NULL);
- if (dir_cnt == -1) {
- (void)fprintf(stderr, "%s: can't read directory %s.\n",
- progname, from.p_path);
- exit_val = EXIT_FAILURE;
- }
-
- /*
- * Instead of handling directory entries in the order they appear
- * on disk, do non-directory files before directory files.
- * There are two reasons to do directories last. The first is
- * efficiency. Files tend to be in the same cylinder group as
- * their parent, whereas directories tend not to be. Copying files
- * all at once reduces seeking. Second, deeply nested tree's
- * could use up all the file descriptors if we didn't close one
- * directory before recursivly starting on the next.
- */
- /* copy files */
- for (i = 0; i < dir_cnt; ++i) {
- dp = dir_list[i];
-
- #ifdef _POSIX_SOURCE /* DF_MSS */
- if (strlen(dp->d_name) <= 2 && dp->d_name[0] == '.'
- #else
- if (dp->d_namlen <= 2 && dp->d_name[0] == '.'
- #endif
- && (dp->d_name[1] == '\0' || dp->d_name[1] == '.'))
- goto done;
- #ifdef _POSIX_SOURCE /* DF_MSS */
- old_from = path_append(&from, dp->d_name, (int)strlen(dp->d_name));
- #else
- old_from = path_append(&from, dp->d_name, (int)dp->d_namlen);
- #endif
- if (!old_from) {
- exit_val = EXIT_FAILURE;
- goto done;
- }
-
- if (statfcn(from.p_path, &from_stat) < 0) {
- #if 0
- (void) fprintf(stderr, "#11\n");
- #endif
- error(dp->d_name);
- path_restore(&from, old_from);
- goto done;
- }
- if (S_ISDIR(from_stat.st_mode)) {
- path_restore(&from, old_from);
- continue;
- }
- old_to = path_append(&to, dp->d_name, (int)strlen(dp->d_name));
- if (old_to) {
- copy();
- path_restore(&to, old_to);
- } else
- exit_val = EXIT_FAILURE;
- path_restore(&from, old_from);
- done: dir_list[i] = NULL;
- (void)free((void *)dp);
- }
-
- /* copy directories */
- for (i = 0; i < dir_cnt; ++i) {
- dp = dir_list[i];
- if (!dp)
- continue;
- old_from = path_append(&from, dp->d_name, (int) strlen(dp->d_name));
- if (!old_from) {
- exit_val = EXIT_FAILURE;
- (void)free((void *)dp);
- continue;
- }
- old_to = path_append(&to, dp->d_name, (int) strlen(dp->d_name));
- if (!old_to) {
- exit_val = EXIT_FAILURE;
- (void)free((void *)dp);
- path_restore(&from, old_from);
- continue;
- }
- copy();
- free((void *)dp);
- path_restore(&from, old_from);
- path_restore(&to, old_to);
- }
- free((void *)dir_list);
- }
-
- void
- #if __STDC__
- copy_link (int exists)
- #else
- copy_link(exists)
- int exists;
- #endif
- {
- #ifdef _POSIX_SOURCE /* DF_MSS */
- if (exists)
- ;
- #else
- int len;
- char link[MAXPATHLEN];
-
- if ((len = readlink(from.p_path, link, sizeof(link))) == -1) {
- #if 0
- (void) fprintf(stderr, "#12\n");
- #endif
- error(from.p_path);
- return;
- }
- link[len] = '\0';
- if (exists && unlink(to.p_path)) {
- #if 0
- (void) fprintf(stderr, "#13\n");
- #endif
- error(to.p_path);
- return;
- }
- if (symlink(link, to.p_path)) {
- #if 0
- (void) fprintf(stderr, "#14\n");
- #endif
- error(link);
- return;
- }
- #endif
- }
-
- void
- #if __STDC__
- copy_fifo (struct stat *from_stat, int exists)
- #else
- copy_fifo(from_stat, exists)
- struct stat *from_stat;
- int exists;
- #endif
- {
- if (exists && unlink(to.p_path)) {
- #if 0
- (void) fprintf(stderr, "#15\n");
- #endif
- error(to.p_path);
- return;
- }
- if (mkfifo(to.p_path, from_stat->st_mode)) {
- #if 0
- (void) fprintf(stderr, "#16\n");
- #endif
- error(to.p_path);
- return;
- }
- if (pflag)
- setfile(from_stat, 0);
- }
-
- void
- #if __STDC__
- copy_special (struct stat *from_stat, int exists)
- #else
- copy_special(from_stat, exists)
- struct stat *from_stat;
- int exists;
- #endif
- {
- if (exists && unlink(to.p_path)) {
- #if 0
- (void) fprintf(stderr, "#17\n");
- #endif
- error(to.p_path);
- return;
- }
- #ifdef _POSIX_SOURCE /* DF_MSS */
- if (mknod(to.p_path, from_stat->st_mode, 0)) {
- #else
- if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) {
- #endif
- #if 0
- (void) fprintf(stderr, "#18\n");
- #endif
- error(to.p_path);
- return;
- }
- if (pflag)
- setfile(from_stat, 0);
- }
-
- void
- #if __STDC__
- setfile (register struct stat *fs, int fd)
- #else
- setfile(fs, fd)
- register struct stat *fs;
- int fd;
- #endif
- {
- static struct timeval tv[2];
- char path[100];
-
- #ifdef _POSIX_SOURCE /* DF_MSS */
- if (fd)
- ;
- #endif
- fs->st_mode &= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
-
- tv[0].tv_sec = fs->st_atime;
- tv[1].tv_sec = fs->st_mtime;
- if (utimes(to.p_path, tv)) {
- (void)snprintf(path, sizeof(path), "utimes: %s", to.p_path);
- #if 0
- (void) fprintf(stderr, "#19\n");
- #endif
- error(path);
- }
- /*
- * 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.
- */
- #ifdef _POSIX_SOURCE /* DF_MSS */
- if (chown(to.p_path, fs->st_uid, fs->st_gid)) {
- #else
- if (fd ? fchown(fd, fs->st_uid, fs->st_gid) :
- chown(to.p_path, fs->st_uid, fs->st_gid)) {
- #endif
- if (errno != EPERM) {
- (void)snprintf(path, sizeof(path),
- "chown: %s", to.p_path);
- #if 0
- (void) fprintf(stderr, "#20\n");
- #endif
- error(path);
- }
- fs->st_mode &= ~(S_ISUID|S_ISGID);
- }
- #ifdef _POSIX_SOURCE /* DF_MSS */
- if (chmod(to.p_path, fs->st_mode)) {
- #else
- if (fd ? fchmod(fd, fs->st_mode) : chmod(to.p_path, fs->st_mode)) {
- #endif
- (void)snprintf(path, sizeof(path), "chown: %s", to.p_path);
- #if 0
- (void) fprintf(stderr, "#21\n");
- #endif
- error(path);
- }
- }
-
- void
- #if __STDC__
- error (const char *s)
- #else
- error(s)
- char *s;
- #endif
- {
- exit_val = EXIT_FAILURE;
- (void)fprintf(stderr, "%s: %s: %s\n", progname, s, strerror(errno));
- }
-
- void
- #if __STDC__
- usage (void)
- #else
- usage()
- #endif
- {
- (void)fprintf(stderr,
- #if WIN_NT
- "usage: cp [-Rfip] src target;\n or: cp [-Rfip] src1 ... srcN directory\n");
- #else
- "usage: cp [-Rfip] src target;\n or: cp [-Rfhip] src1 ... srcN directory\n");
- #endif
- #if WIN_NT
- if (ppid == (pid_t) 1 && globulation == 0)
- deglobulate();
- #endif
- exit(EXIT_FAILURE);
- }
-