diff options
Diffstat (limited to 'cpukit/libmisc/shell/utils-cp.c')
| -rw-r--r-- | cpukit/libmisc/shell/utils-cp.c | 350 |
1 files changed, 350 insertions, 0 deletions
diff --git a/cpukit/libmisc/shell/utils-cp.c b/cpukit/libmisc/shell/utils-cp.c new file mode 100644 index 0000000000..52cbc63470 --- /dev/null +++ b/cpukit/libmisc/shell/utils-cp.c @@ -0,0 +1,350 @@ +/* $NetBSD: utils.c,v 1.29 2005/10/15 18:22:18 christos Exp $ */ + +/*- + * 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. 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. + */ + +#include <sys/cdefs.h> +#if 0 +#ifndef lint +#if 0 +static char sccsid[] = "@(#)utils.c 8.3 (Berkeley) 4/1/94"; +#else +__RCSID("$NetBSD: utils.c,v 1.29 2005/10/15 18:22:18 christos Exp $"); +#endif +#endif /* not lint */ +#endif + +#if 0 +#include <sys/mman.h> +#endif +#include <sys/param.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/utime.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-cp.h" + +#define lchmod chmod +#define lchown chown + +int +set_utimes(const char *file, struct stat *fs) +{ + struct utimbuf tv; + + tv.actime = fs->st_atime; + tv.modtime = fs->st_mtime; + + if (utime(file, &tv)) { + warn("lutimes: %s", file); + return (1); + } + return (0); +} + +int +copy_file(rtems_shell_cp_globals* cp_globals, FTSENT *entp, int dne) +{ + static char buf[MAXBSIZE]; + struct stat to_stat, *fs; + int ch, checkch, from_fd, rcount, rval, to_fd, wcount; + + 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' && checkch != 'Y') { + (void)close(from_fd); + return (0); + } + } + /* overwrite existing destination file name */ + 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 && fflag) { + /* + * attempt to remove existing destination file name and + * 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)); + } + + if (to_fd == -1) { + warn("%s", to.p_path); + (void)close(from_fd); + return (1); + } + + rval = 0; + + /* + * There's no reason to do anything other than close the file + * now if it's empty, so let's not bother. + */ + + if (fs->st_size) { + + /* + * 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. + */ +#if 0 + if (fs->st_size <= 8 * 1048576) { + size_t fsize = (size_t)fs->st_size; + p = mmap(NULL, fsize, PROT_READ, MAP_FILE|MAP_SHARED, + from_fd, (off_t)0); + if (p == MAP_FAILED) { + goto mmap_failed; + } else { + (void) madvise(p, (size_t)fs->st_size, + MADV_SEQUENTIAL); + if (write(to_fd, p, fsize) != + fs->st_size) { + warn("%s", to.p_path); + rval = 1; + } + if (munmap(p, fsize) < 0) { + warn("%s", entp->fts_path); + rval = 1; + } + } + } else { +mmap_failed: +#endif + { + while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) { + wcount = write(to_fd, buf, (size_t)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 (rval == 1) { + (void)close(from_fd); + (void)close(to_fd); + return (1); + } + + if (pflag && setfile(cp_globals, 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; + } + /* set the mod/access times now after close of the fd */ + if (pflag && set_utimes(to.p_path, fs)) { + rval = 1; + } + return (rval); +} + +int +copy_link(rtems_shell_cp_globals* cp_globals, FTSENT *p, int exists) +{ + int len; + char target[MAXPATHLEN]; + + if ((len = readlink(p->fts_path, target, sizeof(target)-1)) == -1) { + warn("readlink: %s", p->fts_path); + return (1); + } + target[len] = '\0'; + if (exists && unlink(to.p_path)) { + warn("unlink: %s", to.p_path); + return (1); + } + if (symlink(target, to.p_path)) { + warn("symlink: %s", target); + return (1); + } + return (pflag ? setfile(cp_globals, p->fts_statp, 0) : 0); +} + +int +copy_fifo(rtems_shell_cp_globals* cp_globals, 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(cp_globals, from_stat, 0) : 0); +} + +int +copy_special(rtems_shell_cp_globals* cp_globals, 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(cp_globals, from_stat, 0) : 0); +} + + +/* + * Function: setfile + * + * Purpose: + * Set the owner/group/permissions for the "to" file to the information + * in the stat structure. If fd is zero, also call set_utimes() to set + * the mod/access times. If fd is non-zero, the caller must do a utimes + * itself after close(fd). + */ +#define st_flags st_mode + +int +setfile(rtems_shell_cp_globals* cp_globals, struct stat *fs, int fd) +{ + int rval, islink; + + rval = 0; + islink = S_ISLNK(fs->st_mode); + fs->st_mode &= S_ISUID | S_ISGID | 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 0 + if (fd ? fchown(fd, fs->st_uid, fs->st_gid) : + lchown(to.p_path, fs->st_uid, fs->st_gid)) { +#endif + if (lchown(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) : lchmod(to.p_path, fs->st_mode)) { + warn("chmod: %s", to.p_path); + rval = 1; + } + +#if 0 + if (!islink && !Nflag) { + unsigned long fflags = fs->st_flags; + /* + * XXX + * NFS doesn't support chflags; ignore errors unless + * there's reason to believe we're losing bits. + * (Note, this still won't be right if the server + * supports flags and we were trying to *remove* flags + * on a file that we copied, i.e., that we didn't create.) + */ + errno = 0; + if ((fd ? fchflags(fd, fflags) : + chflags(to.p_path, fflags)) == -1) + if (errno != EOPNOTSUPP || fs->st_flags != 0) { + warn("chflags: %s", to.p_path); + rval = 1; + } + } +#endif + /* if fd is non-zero, caller must call set_utimes() after close() */ + if (fd == 0 && set_utimes(to.p_path, fs)) + rval = 1; + return (rval); +} + +void +usage(void) +{ + (void)fprintf(stderr, + "usage: %s [-R [-H | -L | -P]] [-f | -i] [-pv] src target\n" + " %s [-R [-H | -L | -P]] [-f | -i] [-pv] src1 ... srcN directory\n", + "cp", "cp"); +} |