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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) tons of folks. Tracking down who wrote what
* isn't something I'm going to worry about... If you wrote something
* here, please feel free to acknowledge your work.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
* Permission has been granted to redistribute this code under the GPL.
*
*/
#include <stdio.h>
#include <errno.h>
#include <utime.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "libbb.h"
/*
* Copy one file to another, while possibly preserving its modes, times, and
* modes. Returns TRUE if successful, or FALSE on a failure with an error
* message output. (Failure is not indicated if attributes cannot be set.)
* -Erik Andersen
*/
int
copy_file(const char *src_name, const char *dst_name,
int set_modes, int follow_links, int force_flag, int quiet_flag)
{
FILE *src_file = NULL;
FILE *dst_file = NULL;
struct stat srcStatBuf;
struct stat dstStatBuf;
struct utimbuf times;
int src_status;
int dst_status;
if (follow_links == TRUE) {
src_status = stat(src_name, &srcStatBuf);
dst_status = stat(dst_name, &dstStatBuf);
} else {
src_status = lstat(src_name, &srcStatBuf);
dst_status = lstat(dst_name, &dstStatBuf);
}
if (src_status < 0) {
if (!quiet_flag) {
perror_msg("%s", src_name);
}
return FALSE;
}
if ((dst_status < 0) || force_flag) {
unlink(dst_name);
dstStatBuf.st_ino = -1;
dstStatBuf.st_dev = -1;
}
if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
(srcStatBuf.st_ino == dstStatBuf.st_ino)) {
if (!quiet_flag) {
error_msg("Copying file \"%s\" to itself", src_name);
}
return FALSE;
}
if (S_ISDIR(srcStatBuf.st_mode)) {
//fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
/* Make sure the directory is writable */
dst_status = create_path(dst_name, 0777777 ^ umask(0));
if ((dst_status < 0) && (errno != EEXIST)) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
return FALSE;
}
} else if (S_ISLNK(srcStatBuf.st_mode)) {
char link_val[BUFSIZ + 1];
int link_size;
//fprintf(stderr, "copying link %s to %s\n", srcName, destName);
/* Warning: This could possibly truncate silently, to BUFSIZ chars */
link_size = readlink(src_name, &link_val[0], BUFSIZ);
if (link_size < 0) {
if (quiet_flag) {
perror_msg("%s", src_name);
}
return FALSE;
}
link_val[link_size] = '\0';
src_status = symlink(link_val, dst_name);
if (src_status < 0) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
return FALSE;
}
#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
if (set_modes == TRUE) {
/* Try to set owner, but fail silently like GNU cp */
lchown(dst_name, srcStatBuf.st_uid, srcStatBuf.st_gid);
}
#endif
return TRUE;
} else if (S_ISFIFO(srcStatBuf.st_mode)) {
//fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
if (mkfifo(dst_name, 0644) < 0) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
return FALSE;
}
} else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
|| S_ISSOCK(srcStatBuf.st_mode)) {
//fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
if (mknod(dst_name, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
return FALSE;
}
} else if (S_ISREG(srcStatBuf.st_mode)) {
//fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
src_file = fopen(src_name, "r");
if (src_file == NULL) {
if (!quiet_flag) {
perror_msg("%s", src_name);
}
return FALSE;
}
dst_file = fopen(dst_name, "w");
chmod(dst_name, srcStatBuf.st_mode);
if (dst_file == NULL) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
fclose(src_file);
return FALSE;
}
if (copy_file_chunk(src_file, dst_file, srcStatBuf.st_size)==FALSE) {
goto error_exit;
}
fclose(src_file);
if (fclose(dst_file) < 0) {
return FALSE;
}
}
if (set_modes == TRUE) {
/* This is fine, since symlinks never get here */
if (chown(dst_name, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0)
perror_msg("%s", dst_name);
if (chmod(dst_name, srcStatBuf.st_mode) < 0)
perror_msg("%s", dst_name);
times.actime = srcStatBuf.st_atime;
times.modtime = srcStatBuf.st_mtime;
if (utime(dst_name, ×) < 0)
perror_msg("%s", dst_name);
}
return TRUE;
error_exit:
perror_msg("%s", dst_name);
fclose(src_file);
fclose(dst_file);
return FALSE;
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
|
