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639 lines
13 KiB
C
639 lines
13 KiB
C
/*
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* Utility routines.
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*
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* Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
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* Permission has been granted to redistribute this code under the GPL.
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <time.h>
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#include <utime.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#if defined (BB_CP) || defined (BB_MV)
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/*
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* Return TRUE if a fileName is a directory.
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* Nonexistant files return FALSE.
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*/
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int isDirectory(const char *name)
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{
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struct stat statBuf;
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if (stat(name, &statBuf) < 0)
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return FALSE;
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if (S_ISDIR(statBuf.st_mode))
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return TRUE;
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return(FALSE);
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}
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/*
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* Copy one file to another, while possibly preserving its modes, times,
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* and modes. Returns TRUE if successful, or FALSE on a failure with an
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* error message output. (Failure is not indicted if the attributes cannot
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* be set.)
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*/
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int
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copyFile( const char *srcName, const char *destName,
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int setModes, int followLinks)
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{
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int rfd;
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int wfd;
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int rcc;
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int result;
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char buf[BUF_SIZE];
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struct stat srcStatBuf;
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struct stat dstStatBuf;
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struct utimbuf times;
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if (followLinks == FALSE)
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result = stat(srcName, &srcStatBuf);
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else
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result = lstat(srcName, &srcStatBuf);
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if (result < 0) {
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perror(srcName);
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return FALSE;
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}
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if (followLinks == FALSE)
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result = stat(destName, &dstStatBuf);
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else
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result = lstat(destName, &dstStatBuf);
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if (result < 0) {
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dstStatBuf.st_ino = -1;
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dstStatBuf.st_dev = -1;
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}
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if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
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(srcStatBuf.st_ino == dstStatBuf.st_ino)) {
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fprintf(stderr, "Copying file \"%s\" to itself\n", srcName);
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return FALSE;
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}
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if (S_ISDIR(srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
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/* Make sure the directory is writable */
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if (mkdir(destName, 0777777 ^ umask(0))) {
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perror(destName);
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return (FALSE);
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}
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} else if (S_ISLNK(srcStatBuf.st_mode)) {
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char *link_val;
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int link_size;
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//fprintf(stderr, "copying link %s to %s\n", srcName, destName);
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link_val = (char *) alloca(PATH_MAX + 2);
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link_size = readlink(srcName, link_val, PATH_MAX + 1);
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if (link_size < 0) {
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perror(srcName);
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return (FALSE);
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}
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link_val[link_size] = '\0';
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link_size = symlink(link_val, destName);
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if (link_size != 0) {
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perror(destName);
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return (FALSE);
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}
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} else if (S_ISFIFO(srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
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if (mkfifo(destName, 644)) {
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perror(destName);
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return (FALSE);
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}
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} else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
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|| S_ISSOCK (srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
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if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev)) {
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perror(destName);
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return (FALSE);
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}
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} else if (S_ISREG(srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
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rfd = open(srcName, O_RDONLY);
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if (rfd < 0) {
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perror(srcName);
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return FALSE;
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}
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wfd = creat(destName, srcStatBuf.st_mode);
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if (wfd < 0) {
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perror(destName);
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close(rfd);
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return FALSE;
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}
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while ((rcc = read(rfd, buf, sizeof(buf))) > 0) {
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if (fullWrite(wfd, buf, rcc) < 0)
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goto error_exit;
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}
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if (rcc < 0) {
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goto error_exit;
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}
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close(rfd);
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if (close(wfd) < 0) {
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return FALSE;
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}
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}
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if (setModes == TRUE) {
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//fprintf(stderr, "Setting permissions for %s\n", destName);
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chmod(destName, srcStatBuf.st_mode);
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if (followLinks == TRUE)
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chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
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else
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lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
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times.actime = srcStatBuf.st_atime;
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times.modtime = srcStatBuf.st_mtime;
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utime(destName, ×);
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}
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return TRUE;
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error_exit:
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perror(destName);
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close(rfd);
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close(wfd);
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return FALSE;
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}
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#endif
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#ifdef BB_TAR
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/*
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* Return the standard ls-like mode string from a file mode.
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* This is static and so is overwritten on each call.
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*/
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const char *modeString(int mode)
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{
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static char buf[12];
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strcpy(buf, "----------");
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/*
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* Fill in the file type.
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*/
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if (S_ISDIR(mode))
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buf[0] = 'd';
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if (S_ISCHR(mode))
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buf[0] = 'c';
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if (S_ISBLK(mode))
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buf[0] = 'b';
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if (S_ISFIFO(mode))
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buf[0] = 'p';
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if (S_ISLNK(mode))
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buf[0] = 'l';
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if (S_ISSOCK(mode))
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buf[0] = 's';
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/*
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* Now fill in the normal file permissions.
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*/
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if (mode & S_IRUSR)
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buf[1] = 'r';
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if (mode & S_IWUSR)
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buf[2] = 'w';
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if (mode & S_IXUSR)
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buf[3] = 'x';
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if (mode & S_IRGRP)
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buf[4] = 'r';
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if (mode & S_IWGRP)
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buf[5] = 'w';
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if (mode & S_IXGRP)
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buf[6] = 'x';
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if (mode & S_IROTH)
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buf[7] = 'r';
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if (mode & S_IWOTH)
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buf[8] = 'w';
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if (mode & S_IXOTH)
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buf[9] = 'x';
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/*
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* Finally fill in magic stuff like suid and sticky text.
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*/
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if (mode & S_ISUID)
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buf[3] = ((mode & S_IXUSR) ? 's' : 'S');
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if (mode & S_ISGID)
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buf[6] = ((mode & S_IXGRP) ? 's' : 'S');
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if (mode & S_ISVTX)
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buf[9] = ((mode & S_IXOTH) ? 't' : 'T');
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return buf;
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}
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/*
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* Get the time string to be used for a file.
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* This is down to the minute for new files, but only the date for old files.
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* The string is returned from a static buffer, and so is overwritten for
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* each call.
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*/
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const char *timeString(time_t timeVal)
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{
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time_t now;
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char *str;
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static char buf[26];
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time(&now);
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str = ctime(&timeVal);
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strcpy(buf, &str[4]);
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buf[12] = '\0';
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if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) {
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strcpy(&buf[7], &str[20]);
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buf[11] = '\0';
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}
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return buf;
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}
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/*
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* Routine to see if a text string is matched by a wildcard pattern.
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* Returns TRUE if the text is matched, or FALSE if it is not matched
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* or if the pattern is invalid.
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* * matches zero or more characters
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* ? matches a single character
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* [abc] matches 'a', 'b' or 'c'
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* \c quotes character c
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* Adapted from code written by Ingo Wilken.
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*/
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int match(const char *text, const char *pattern)
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{
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const char *retryPat;
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const char *retryText;
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int ch;
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int found;
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retryPat = NULL;
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retryText = NULL;
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while (*text || *pattern) {
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ch = *pattern++;
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switch (ch) {
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case '*':
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retryPat = pattern;
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retryText = text;
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break;
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case '[':
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found = FALSE;
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while ((ch = *pattern++) != ']') {
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if (ch == '\\')
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ch = *pattern++;
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if (ch == '\0')
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return FALSE;
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if (*text == ch)
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found = TRUE;
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}
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if (!found) {
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pattern = retryPat;
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text = ++retryText;
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}
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/* fall into next case */
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case '?':
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if (*text++ == '\0')
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return FALSE;
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break;
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case '\\':
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ch = *pattern++;
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if (ch == '\0')
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return FALSE;
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/* fall into next case */
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default:
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if (*text == ch) {
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if (*text)
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text++;
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break;
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}
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if (*text) {
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pattern = retryPat;
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text = ++retryText;
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break;
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}
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return FALSE;
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}
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if (pattern == NULL)
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return FALSE;
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}
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return TRUE;
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}
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/*
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* Write all of the supplied buffer out to a file.
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* This does multiple writes as necessary.
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* Returns the amount written, or -1 on an error.
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*/
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int fullWrite(int fd, const char *buf, int len)
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{
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int cc;
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int total;
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total = 0;
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while (len > 0) {
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cc = write(fd, buf, len);
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if (cc < 0)
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return -1;
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buf += cc;
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total += cc;
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len -= cc;
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}
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return total;
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}
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/*
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* Read all of the supplied buffer from a file.
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* This does multiple reads as necessary.
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* Returns the amount read, or -1 on an error.
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* A short read is returned on an end of file.
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*/
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int fullRead(int fd, char *buf, int len)
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{
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int cc;
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int total;
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total = 0;
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while (len > 0) {
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cc = read(fd, buf, len);
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if (cc < 0)
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return -1;
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if (cc == 0)
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break;
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buf += cc;
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total += cc;
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len -= cc;
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}
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return total;
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}
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#endif
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#if defined (BB_CHOWN) || defined (BB_CP) || defined (BB_FIND) || defined (BB_LS)
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/*
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* Walk down all the directories under the specified
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* location, and do something (something specified
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* by the fileAction and dirAction function pointers).
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*/
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int
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recursiveAction(const char *fileName, int recurse, int followLinks, int delayDirAction,
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int (*fileAction) (const char *fileName, struct stat* statbuf),
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int (*dirAction) (const char *fileName, struct stat* statbuf))
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{
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int status;
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struct stat statbuf;
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struct dirent *next;
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if (followLinks == FALSE)
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status = stat(fileName, &statbuf);
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else
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status = lstat(fileName, &statbuf);
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if (status < 0) {
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perror(fileName);
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return (FALSE);
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}
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if (recurse == FALSE) {
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if (S_ISDIR(statbuf.st_mode)) {
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if (dirAction != NULL)
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return (dirAction(fileName, &statbuf));
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else
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return (TRUE);
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}
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}
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if (S_ISDIR(statbuf.st_mode)) {
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DIR *dir;
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dir = opendir(fileName);
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if (!dir) {
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perror(fileName);
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return (FALSE);
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}
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if (dirAction != NULL && delayDirAction == FALSE) {
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status = dirAction(fileName, &statbuf);
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if (status == FALSE) {
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perror(fileName);
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return (FALSE);
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}
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}
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while ((next = readdir(dir)) != NULL) {
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char nextFile[NAME_MAX];
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if ((strcmp(next->d_name, "..") == 0)
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|| (strcmp(next->d_name, ".") == 0)) {
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continue;
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}
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sprintf(nextFile, "%s/%s", fileName, next->d_name);
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status =
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recursiveAction(nextFile, TRUE, followLinks, delayDirAction,
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fileAction, dirAction);
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if (status < 0) {
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closedir(dir);
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return (FALSE);
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}
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}
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status = closedir(dir);
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if (status < 0) {
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perror(fileName);
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return (FALSE);
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}
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if (dirAction != NULL && delayDirAction == TRUE) {
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status = dirAction(fileName, &statbuf);
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if (status == FALSE) {
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perror(fileName);
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return (FALSE);
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}
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}
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} else {
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if (fileAction == NULL)
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return (TRUE);
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else
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return (fileAction(fileName, &statbuf));
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}
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return (TRUE);
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}
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#endif
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#if defined (BB_TAR) || defined (BB_MKDIR)
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/*
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* Attempt to create the directories along the specified path, except for
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* the final component. The mode is given for the final directory only,
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* while all previous ones get default protections. Errors are not reported
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* here, as failures to restore files can be reported later.
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*/
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extern void createPath (const char *name, int mode)
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{
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char *cp;
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char *cpOld;
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char buf[NAME_MAX];
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strcpy (buf, name);
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cp = strchr (buf, '/');
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while (cp) {
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cpOld = cp;
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cp = strchr (cp + 1, '/');
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*cpOld = '\0';
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if (mkdir (buf, cp ? 0777 : mode) == 0)
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printf ("Directory \"%s\" created\n", buf);
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*cpOld = '/';
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}
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}
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#endif
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#if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR)
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/* [ugoa]{+|-|=}[rwxstl] */
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extern int parse_mode( const char* s, mode_t* theMode)
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{
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mode_t or;
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mode_t and;
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mode_t mode = 0;
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mode_t groups = S_ISVTX;
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char type;
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char c;
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do {
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for ( ; ; ) {
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switch ( c = *s++ ) {
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case '\0':
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return (FALSE);
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case 'u':
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groups |= S_ISUID|S_IRWXU;
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continue;
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case 'g':
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groups |= S_ISGID|S_IRWXG;
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continue;
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case 'o':
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groups |= S_IRWXO;
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continue;
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case 'a':
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groups |= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
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continue;
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case '+':
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case '=':
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case '-':
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type = c;
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if ( groups == S_ISVTX ) /* The default is "all" */
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groups |= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
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|
break;
|
|
default:
|
|
if ( c >= '0' && c <= '7' && mode == 0 && groups == S_ISVTX ) {
|
|
and = 0;
|
|
or = strtol(--s, 0, 010);
|
|
return (TRUE);
|
|
}
|
|
else
|
|
return (FALSE);
|
|
}
|
|
break;
|
|
}
|
|
|
|
while ( (c = *s++) != '\0' ) {
|
|
switch ( c ) {
|
|
case ',':
|
|
break;
|
|
case 'r':
|
|
mode |= S_IRUSR|S_IRGRP|S_IROTH;
|
|
continue;
|
|
case 'w':
|
|
mode |= S_IWUSR|S_IWGRP|S_IWOTH;
|
|
continue;
|
|
case 'x':
|
|
mode |= S_IXUSR|S_IXGRP|S_IXOTH;
|
|
continue;
|
|
case 's':
|
|
mode |= S_IXGRP|S_ISUID|S_ISGID;
|
|
continue;
|
|
case 't':
|
|
mode |= S_ISVTX;
|
|
continue;
|
|
default:
|
|
return (FALSE);
|
|
}
|
|
break;
|
|
}
|
|
switch ( type ) {
|
|
case '=':
|
|
and &= ~(groups);
|
|
/* fall through */
|
|
case '+':
|
|
or |= mode & groups;
|
|
break;
|
|
case '-':
|
|
and &= ~(mode & groups);
|
|
or &= and;
|
|
break;
|
|
}
|
|
} while ( c == ',' );
|
|
return (TRUE);
|
|
}
|
|
#endif
|
|
|
|
/* END CODE */
|