nextcloud-desktop/src/std/c_file.c

247 lines
4.4 KiB
C
Raw Normal View History

2008-02-27 20:56:47 +03:00
/*
* cynapses libc functions
*
* Copyright (c) 2008 by Andreas Schneider <mail@cynapses.org>
*
* 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.
*
* vim: ts=2 sw=2 et cindent
*/
#ifdef _WIN32
#include <windef.h>
#include <winbase.h>
#endif
2008-02-27 20:56:47 +03:00
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
2013-03-22 13:23:17 +04:00
#include <string.h>
2008-02-27 20:56:47 +03:00
#include "c_file.h"
#include "c_string.h"
#include "c_private.h"
2008-02-27 20:56:47 +03:00
/* check if path is a file */
int c_isfile(const char *path) {
csync_stat_t sb;
_TCHAR *wpath = c_multibyte(path);
int re = _tstat(wpath, &sb);
c_free_multibyte(wpath);
if (re< 0) {
2008-02-27 20:56:47 +03:00
return 0;
}
#ifdef __unix__
2008-02-27 20:56:47 +03:00
if (S_ISREG(sb.st_mode) || S_ISLNK(sb.st_mode)) {
#else
if (S_ISREG(sb.st_mode)) {
#endif
2008-02-27 20:56:47 +03:00
return 1;
}
return 0;
}
/* copy file from src to dst, overwrites dst */
int c_copy(const char* src, const char *dst, mode_t mode) {
2008-05-08 18:00:05 +04:00
int srcfd = -1;
int dstfd = -1;
int rc = -1;
2008-02-27 20:56:47 +03:00
ssize_t bread, bwritten;
csync_stat_t sb;
char buf[4096];
2008-02-27 20:56:47 +03:00
#ifdef _WIN32
if(src && dst) {
_TCHAR *wsrc = c_multibyte(src);
_TCHAR *wdst = c_multibyte(dst);
if (CopyFileW(wsrc, wdst, FALSE)) {
rc = 0;
}
c_free_multibyte(wsrc);
c_free_multibyte(wdst);
if( rc < 0 ) {
errno = GetLastError();
}
}
return rc;
#else
/* Win32 does not come here. */
2008-02-27 20:56:47 +03:00
if (c_streq(src, dst)) {
return -1;
}
if (lstat(src, &sb) < 0) {
return -1;
}
if (S_ISDIR(sb.st_mode)) {
errno = EISDIR;
return -1;
}
if (mode == 0) {
mode = sb.st_mode;
}
if (lstat(dst, &sb) == 0) {
if (S_ISDIR(sb.st_mode)) {
errno = EISDIR;
return -1;
}
}
if ((srcfd = open(src, O_RDONLY, 0)) < 0) {
rc = -1;
goto out;
}
if ((dstfd = open(dst, O_CREAT|O_WRONLY|O_TRUNC, mode)) < 0) {
rc = -1;
goto out;
}
for (;;) {
bread = read(srcfd, buf, sizeof(buf));
2008-02-27 20:56:47 +03:00
if (bread == 0) {
/* done */
break;
} else if (bread < 0) {
errno = ENODATA;
rc = -1;
goto out;
}
bwritten = write(dstfd, buf, bread);
if (bwritten < 0) {
errno = ENODATA;
rc = -1;
goto out;
}
if (bread != bwritten) {
errno = EFAULT;
rc = -1;
goto out;
}
}
#ifdef __unix__
fsync(dstfd);
#endif
2008-02-27 20:56:47 +03:00
rc = 0;
out:
if (srcfd > 0) {
close(srcfd);
}
if (dstfd > 0) {
close(dstfd);
}
2008-02-27 20:56:47 +03:00
if (rc < 0) {
unlink(dst);
}
return rc;
#endif
2008-02-27 20:56:47 +03:00
}
int c_compare_file( const char *f1, const char *f2 ) {
_TCHAR *wf1, *wf2;
int fd1 = -1, fd2 = -1;
2013-03-22 13:23:17 +04:00
size_t size1, size2;
char buffer1[BUFFER_SIZE];
char buffer2[BUFFER_SIZE];
csync_stat_t stat1;
csync_stat_t stat2;
2013-03-22 13:23:17 +04:00
int rc = -1;
2013-03-22 13:23:17 +04:00
if(f1 == NULL || f2 == NULL) return -1;
wf1 = c_multibyte(f1);
2013-03-22 13:23:17 +04:00
if(wf1 == NULL) {
return -1;
}
wf2 = c_multibyte(f2);
2013-03-22 13:23:17 +04:00
if(wf2 == NULL) {
return -1;
}
/* compare size first. */
2013-03-22 13:23:17 +04:00
rc = _tstat(wf1, &stat1);
if(rc< 0) {
goto out;
}
2013-03-22 13:23:17 +04:00
rc = _tstat(wf2, &stat2);
if(rc < 0) {
goto out;
}
/* if sizes are different, the files can not be equal. */
if( stat1.st_size != stat2.st_size ) {
2013-03-22 13:23:17 +04:00
rc = 0;
goto out;
}
#ifdef _WIN32
_fmode = _O_BINARY;
#endif
fd1 = _topen(wf1, O_RDONLY);
2013-03-22 13:23:17 +04:00
if(fd1 < 0) {
rc = -1;
goto out;
}
fd2 = _topen(wf2, O_RDONLY);
2013-03-22 13:23:17 +04:00
if(fd2 < 0) {
rc = -1;
goto out;
}
while( (size1 = read(fd1, buffer1, BUFFER_SIZE)) > 0 ) {
size2 = read( fd2, buffer2, BUFFER_SIZE );
if( size1 != size2 ) {
2013-03-22 13:23:17 +04:00
rc = 0;
goto out;
}
2013-03-22 13:23:17 +04:00
if(memcmp(buffer1, buffer2, size1) != 0) {
/* buffers are different */
rc = 0;
goto out;
}
}
2013-03-22 13:23:17 +04:00
rc = 1;
out:
2013-03-22 13:23:17 +04:00
if(fd1 > -1) close(fd1);
if(fd2 > -1) close(fd2);
2013-03-22 13:23:17 +04:00
c_free_multibyte(wf1);
c_free_multibyte(wf2);
return rc;
}