/* Copyright (C) 2005 J.F.Dockes
* 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.
*/
#ifndef TEST_COPYFILE
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <utime.h>
#include <cstring>
#include "copyfile.h"
#include "debuglog.h"
using namespace std;
#define CPBSIZ 8192
bool copyfile(const char *src, const char *dst, string &reason, int flags)
{
int sfd = -1;
int dfd = -1;
bool ret = false;
char buf[CPBSIZ];
int oflags = O_WRONLY|O_CREAT|O_TRUNC;
LOGDEB(("copyfile: %s to %s\n", src, dst));
if ((sfd = open(src, O_RDONLY)) < 0) {
reason += string("open ") + src + ": " + strerror(errno);
goto out;
}
if (flags & COPYFILE_EXCL) {
oflags |= O_EXCL;
}
if ((dfd = open(dst, oflags, 0644)) < 0) {
reason += string("open/creat ") + dst + ": " + strerror(errno);
// If we fail because of an open/truncate error, we do not want to unlink
// the file, we might succeed...
flags |= COPYFILE_NOERRUNLINK;
goto out;
}
for (;;) {
int didread;
didread = read(sfd, buf, CPBSIZ);
if (didread < 0) {
reason += string("read src ") + src + ": " + strerror(errno);
goto out;
}
if (didread == 0)
break;
if (write(dfd, buf, didread) != didread) {
reason += string("write dst ") + src + ": " + strerror(errno);
goto out;
}
}
ret = true;
out:
if (ret == false && !(flags©FILE_NOERRUNLINK))
unlink(dst);
if (sfd >= 0)
close(sfd);
if (dfd >= 0)
close(dfd);
return ret;
}
bool renameormove(const char *src, const char *dst, string &reason)
{
// First try rename(2). If this succeeds we're done. If this fails
// with EXDEV, try to copy. Unix really should have a library function
// for this.
if (rename(src, dst) == 0) {
return true;
}
if (errno != EXDEV) {
reason += string("rename(2) failed: ") + strerror(errno);
return false;
}
struct stat st;
if (stat(src, &st) < 0) {
reason += string("Can't stat ") + src + " : " + strerror(errno);
return false;
}
if (!copyfile(src, dst, reason))
return false;
struct stat st1;
if (stat(dst, &st1) < 0) {
reason += string("Can't stat ") + dst + " : " + strerror(errno);
return false;
}
// Try to preserve modes, owner, times. This may fail for a number
// of reasons
if ((st1.st_mode & 0777) != (st.st_mode & 0777)) {
if (chmod(dst, st.st_mode&0777) != 0) {
reason += string("Chmod ") + dst + "Error : " + strerror(errno);
}
}
if (st.st_uid != st1.st_uid || st.st_gid != st1.st_gid) {
if (chown(dst, st.st_uid, st.st_gid) != 0) {
reason += string("Chown ") + dst + "Error : " + strerror(errno);
}
}
struct timeval times[2];
times[0].tv_sec = st.st_atime;
times[0].tv_usec = 0;
times[1].tv_sec = st.st_mtime;
times[1].tv_usec = 0;
utimes(dst, times);
// All ok, get rid of origin
if (unlink(src) < 0) {
reason += string("Can't unlink ") + src + "Error : " + strerror(errno);
}
return true;
}
#else
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string>
#include <iostream>
#include "copyfile.h"
using namespace std;
static int op_flags;
#define OPT_MOINS 0x1
#define OPT_m 0x2
#define OPT_e 0x4
static const char *thisprog;
static char usage [] =
"trcopyfile [-m] src dst\n"
" -m : move instead of copying\n"
" -e : fail if dest exists (only for copy)\n"
"\n"
;
static void
Usage(void)
{
fprintf(stderr, "%s: usage:\n%s", thisprog, usage);
exit(1);
}
int main(int argc, const char **argv)
{
thisprog = argv[0];
argc--; argv++;
while (argc > 0 && **argv == '-') {
(*argv)++;
if (!(**argv))
/* Cas du "adb - core" */
Usage();
while (**argv)
switch (*(*argv)++) {
case 'm': op_flags |= OPT_m; break;
case 'e': op_flags |= OPT_e; break;
default: Usage(); break;
}
argc--; argv++;
}
if (argc != 2)
Usage();
string src = *argv++;argc--;
string dst = *argv++;argc--;
bool ret;
string reason;
if (op_flags & OPT_m) {
ret = renameormove(src.c_str(), dst.c_str(), reason);
} else {
int flags = 0;
if (op_flags & OPT_e) {
flags |= COPYFILE_EXCL;
}
ret = copyfile(src.c_str(), dst.c_str(), reason, flags);
}
if (!ret) {
cerr << reason << endl;
exit(1);
} else {
cout << "Succeeded" << endl;
if (!reason.empty()) {
cout << "Warnings: " << reason << endl;
}
exit(0);
}
}
#endif