diff options
Diffstat (limited to 'src/kmk/kmkbuiltin/cp_utils.c')
| -rw-r--r-- | src/kmk/kmkbuiltin/cp_utils.c | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/src/kmk/kmkbuiltin/cp_utils.c b/src/kmk/kmkbuiltin/cp_utils.c new file mode 100644 index 0000000..e97e75d --- /dev/null +++ b/src/kmk/kmkbuiltin/cp_utils.c @@ -0,0 +1,397 @@ +/*- + * 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 */ + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#define MSC_DO_64_BIT_IO +#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> +#ifndef __HAIKU__ +# include <sysexits.h> +#endif +#include <unistd.h> +#ifdef __sun__ +# include "solfakes.h" +#endif +#ifdef __HAIKU__ +# include "haikufakes.h" +#endif +#ifdef _MSC_VER +# include "mscfakes.h" +#else +# include <sys/time.h> +#endif +#include "cp_extern.h" +#include "cmp_extern.h" + + +/********************************************************************************************************************************* +* Defined Constants And Macros * +*********************************************************************************************************************************/ +#define cp_pct(x,y) (int)(100.0 * (double)(x) / (double)(y)) + +#ifndef MAXBSIZE +# define MAXBSIZE 0x10000 +#endif +#ifndef O_BINARY +# define O_BINARY 0 +#endif + +#ifndef S_ISVTX +# define S_ISVTX 0 +#endif + + +int +copy_file(CPUTILSINSTANCE *pThis, 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 | KMK_OPEN_NO_INHERIT, 0)) == -1) { + warn(pThis->pCtx, "open: %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(pThis->pCtx, from_fd, entp->fts_path, pThis->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 | KMK_OPEN_NO_INHERIT, 0)) == -1) { + warn(pThis->pCtx, "open: %s", entp->fts_path); + return (1); + } + } + } + +#define YESNO "(y/n [n]) " + if (pThis->nflag) { + if (pThis->vflag) + kmk_builtin_ctx_printf(pThis->pCtx, 0, "%s not overwritten\n", pThis->to.p_path); + return (0); + } else if (pThis->iflag) { + (void)fprintf(stderr, "overwrite %s? %s", + pThis->to.p_path, YESNO); + checkch = ch = getchar(); + while (ch != '\n' && ch != EOF) + ch = getchar(); + if (checkch != 'y' && checkch != 'Y') { + (void)close(from_fd); + kmk_builtin_ctx_printf(pThis->pCtx, 1, "not overwritten\n"); + return (1); + } + } + + if (pThis->fflag) { + /* remove existing destination file name, + * create a new file */ + (void)unlink(pThis->to.p_path); + to_fd = open(pThis->to.p_path, O_WRONLY | O_TRUNC | O_CREAT | O_BINARY | KMK_OPEN_NO_INHERIT, + fs->st_mode & ~(S_ISUID | S_ISGID)); + } else + /* overwrite existing destination file name */ + to_fd = open(pThis->to.p_path, O_WRONLY | O_TRUNC | O_BINARY | KMK_OPEN_NO_INHERIT, 0); + } else + to_fd = open(pThis->to.p_path, O_WRONLY | O_TRUNC | O_CREAT | O_BINARY | KMK_OPEN_NO_INHERIT, + fs->st_mode & ~(S_ISUID | S_ISGID)); + + if (to_fd == -1) { + warn(pThis->pCtx, "open: %s", pThis->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(pThis->pCtx, "mmap: %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 defined(SIGINFO) && defined(KMK_BUILTIN_STANDALONE) + if (g_cp_info) { + g_cp_info = 0; + kmk_builtin_ctx_printf(pThis->pCtx, 1, + "%s -> %s %3d%%\n", + entp->fts_path, pThis->to.p_path, + cp_pct(wtotal, fs->st_size)); + + } +#endif + if (wcount >= (ssize_t)wresid || wcount <= 0) + break; + } + if (wcount != (ssize_t)wresid) { + warn(pThis->pCtx, "write[%zd != %zu]: %s", wcount, wresid, pThis->to.p_path); + rval = 1; + } + /* Some systems don't unmap on close(2). */ + if (munmap(p, fs->st_size) < 0) { + warn(pThis->pCtx, "munmap: %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 defined(SIGINFO) && defined(KMK_BUILTIN_STANDALONE) + if (g_cp_info) { + g_cp_info = 0; + kmk_builtin_ctx_printf(pThis->pCtx, 1, + "%s -> %s %3d%%\n", + entp->fts_path, pThis->to.p_path, + cp_pct(wtotal, fs->st_size)); + + } +#endif + if (wcount >= (ssize_t)wresid || wcount <= 0) + break; + } + if (wcount != (ssize_t)wresid) { + warn(pThis->pCtx, "write[%zd != %zu]: %s", wcount, wresid, pThis->to.p_path); + rval = 1; + break; + } + } + if (rcount < 0) { + warn(pThis->pCtx, "read: %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 (pThis->pflag && copy_file_attribs(pThis, fs, to_fd)) + rval = 1; + (void)close(from_fd); + if (close(to_fd)) { + warn(pThis->pCtx, "close: %s", pThis->to.p_path); + rval = 1; + } + return (rval); +} + +int +copy_link(CPUTILSINSTANCE *pThis, const FTSENT *p, int exists) +{ + int len; + char llink[PATH_MAX]; + + if ((len = readlink(p->fts_path, llink, sizeof(llink) - 1)) == -1) { + warn(pThis->pCtx, "readlink: %s", p->fts_path); + return (1); + } + llink[len] = '\0'; + if (exists && unlink(pThis->to.p_path)) { + warn(pThis->pCtx, "unlink: %s", pThis->to.p_path); + return (1); + } + if (symlink(llink, pThis->to.p_path)) { + warn(pThis->pCtx, "symlink: %s", llink); + return (1); + } + return (pThis->pflag ? copy_file_attribs(pThis, p->fts_statp, -1) : 0); +} + +int +copy_fifo(CPUTILSINSTANCE *pThis, struct stat *from_stat, int exists) +{ + if (exists && unlink(pThis->to.p_path)) { + warn(pThis->pCtx, "unlink: %s", pThis->to.p_path); + return (1); + } + if (mkfifo(pThis->to.p_path, from_stat->st_mode)) { + warn(pThis->pCtx, "mkfifo: %s", pThis->to.p_path); + return (1); + } + return (pThis->pflag ? copy_file_attribs(pThis, from_stat, -1) : 0); +} + +int +copy_special(CPUTILSINSTANCE *pThis, struct stat *from_stat, int exists) +{ + if (exists && unlink(pThis->to.p_path)) { + warn(pThis->pCtx, "unlink: %s", pThis->to.p_path); + return (1); + } + if (mknod(pThis->to.p_path, from_stat->st_mode, from_stat->st_rdev)) { + warn(pThis->pCtx, "mknod: %s", pThis->to.p_path); + return (1); + } + return (pThis->pflag ? copy_file_attribs(pThis, from_stat, -1) : 0); +} + +int +copy_file_attribs(CPUTILSINSTANCE *pThis, 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(pThis->to.p_path, tv) : utimes(pThis->to.p_path, tv)) { + warn(pThis->pCtx, "%sutimes: %s", islink ? "l" : "", pThis->to.p_path); + rval = 1; + } + if (fdval ? fstat(fd, &ts) : + (islink ? lstat(pThis->to.p_path, &ts) : stat(pThis->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(pThis->to.p_path, fs->st_uid, fs->st_gid) : + chown(pThis->to.p_path, fs->st_uid, fs->st_gid))) { + if (errno != EPERM) { + warn(pThis->pCtx, "chown: %s", pThis->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(pThis->to.p_path, fs->st_mode) : + chmod(pThis->to.p_path, fs->st_mode))) { + warn(pThis->pCtx, "chmod: %s", pThis->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(pThis->to.p_path, fs->st_flags))) { + warn(pThis->pCtx, "chflags: %s", pThis->to.p_path); + rval = 1; + } +#endif + + return (rval); +} + |