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/*
Copyright (C) 2011 ABRT team
Copyright (C) 2011 RedHat Inc
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "abrtlib.h"
int copy_file_recursive(const char *source, const char *dest)
{
/* This is a recursive function, try to minimize stack usage */
/* NB: each struct stat is ~100 bytes */
struct stat source_stat;
struct stat dest_stat;
int retval = 0;
int dest_exists = 0;
if (strcmp(source, ".lock") == 0)
goto skip;
if (stat(source, &source_stat) < 0) {
perror_msg("Can't stat '%s'", source);
return -1;
}
if (lstat(dest, &dest_stat) < 0) {
if (errno != ENOENT) {
perror_msg("Can't stat '%s'", dest);
return -1;
}
} else {
if (source_stat.st_dev == dest_stat.st_dev
&& source_stat.st_ino == dest_stat.st_ino
) {
error_msg("'%s' and '%s' are the same file", source, dest);
return -1;
}
dest_exists = 1;
}
if (S_ISDIR(source_stat.st_mode)) {
DIR *dp;
struct dirent *d;
if (dest_exists) {
if (!S_ISDIR(dest_stat.st_mode)) {
error_msg("Target '%s' is not a directory", dest);
return -1;
}
/* race here: user can substitute a symlink between
* this check and actual creation of files inside dest */
} else {
/* Create DEST */
mode_t mode = source_stat.st_mode;
/* Allow owner to access new dir (at least for now) */
mode |= S_IRWXU;
if (mkdir(dest, mode) < 0) {
perror_msg("Can't create directory '%s'", dest);
return -1;
}
}
/* Recursively copy files in SOURCE */
dp = opendir(source);
if (dp == NULL) {
retval = -1;
goto ret;
}
while (retval == 0 && (d = readdir(dp)) != NULL) {
char *new_source, *new_dest;
if (dot_or_dotdot(d->d_name))
continue;
new_source = concat_path_file(source, d->d_name);
new_dest = concat_path_file(dest, d->d_name);
if (copy_file_recursive(new_source, new_dest) < 0)
retval = -1;
free(new_source);
free(new_dest);
}
closedir(dp);
goto ret;
}
if (S_ISREG(source_stat.st_mode)) {
int src_fd;
int dst_fd;
mode_t new_mode;
src_fd = open(source, O_RDONLY);
if (src_fd < 0) {
perror_msg("Can't open '%s'", source);
return -1;
}
/* Do not try to open with weird mode fields */
new_mode = source_stat.st_mode;
// security problem versus (sym)link attacks
// dst_fd = open(dest, O_WRONLY|O_CREAT|O_TRUNC, new_mode);
/* safe way: */
dst_fd = open(dest, O_WRONLY|O_CREAT|O_EXCL, new_mode);
if (dst_fd < 0) {
close(src_fd);
return -1;
}
if (copyfd_eof(src_fd, dst_fd, COPYFD_SPARSE) == -1)
retval = -1;
close(src_fd);
/* Careful: do check that buffered writes succeeded... */
if (close(dst_fd) < 0) {
perror_msg("Error writing to '%s'", dest);
retval = -1;
}
goto ret;
}
/* Neither dir not regular file: skip */
skip:
log("Skipping '%s'", source);
ret:
return retval;
}
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