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#include <config.h>
00021
00022
#include <sys/types.h>
00023
00024
#ifdef HAVE_SYS_STAT_H
00025
#include <sys/stat.h>
00026
#endif
00027
00028
#include <unistd.h>
00029
#include <fcntl.h>
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00031
#ifdef HAVE_TEST
00032
#include <test.h>
00033
#endif
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00035
#include <qdatetime.h>
00036
#include <qdir.h>
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00038
#include "kapplication.h"
00039
#include "ksavefile.h"
00040
00041 KSaveFile::KSaveFile(
const QString &filename,
int mode)
00042 : mTempFile(true)
00043 {
00044
00045
00046
QString real_filename = filename;
00047
00048
QFileInfo file_info(real_filename);
00049
int c=0;
00050
while(file_info.isSymLink() && ++c<6) {
00051 real_filename = file_info.readLink();
00052 file_info.setFile( real_filename );
00053 }
00054
00055
00056
00057
00058
if (!checkAccess(real_filename, W_OK))
00059 {
00060 mTempFile.
setError(EACCES);
00061
return;
00062 }
00063
00064
if (mTempFile.
create(real_filename, QString::fromLatin1(
".new"), mode))
00065 {
00066 mFileName = real_filename;
00067
00068
00069
00070
00071
struct stat stat_buf;
00072
if ((stat(QFile::encodeName(real_filename), &stat_buf)==0)
00073 && (stat_buf.st_uid == getuid())
00074 && (stat_buf.st_gid == getgid()))
00075 {
00076 fchmod(mTempFile.
handle() , stat_buf.st_mode);
00077 }
00078 }
00079
return;
00080 }
00081
00082 KSaveFile::~KSaveFile()
00083 {
00084
if (mTempFile.
bOpen)
00085
close();
00086 }
00087
00088
QString
00089 KSaveFile::name()
const
00090
{
00091
return mFileName;
00092 }
00093
00094
void
00095 KSaveFile::abort()
00096 {
00097 mTempFile.
unlink();
00098 mTempFile.
close();
00099 }
00100
00101
bool
00102 KSaveFile::close()
00103 {
00104
if (mTempFile.
name().isEmpty())
00105
return false;
00106
if (!mTempFile.
sync())
00107 {
00108
abort();
00109
return false;
00110 }
00111
if (mTempFile.
close())
00112 {
00113
QDir dir;
00114
bool result = dir.rename( mTempFile.
name(), mFileName);
00115
if ( result )
00116 {
00117
return true;
00118 }
00119 mTempFile.
setError(errno);
00120 }
00121
00122
00123 mTempFile.
unlink();
00124
return false;
00125 }
00126
00127
static int
00128 write_all(
int fd,
const char *buf, size_t len)
00129 {
00130
while (len > 0)
00131 {
00132
int written = write(fd, buf, len);
00133
if (written < 0)
00134 {
00135
if (errno == EINTR)
00136
continue;
00137
return -1;
00138 }
00139 buf += written;
00140 len -= written;
00141 }
00142
return 0;
00143 }
00144
00145 bool KSaveFile::backupFile(
const QString& qFilename,
const QString& backupDir,
00146
const QString& backupExtension)
00147 {
00148
QCString cFilename = QFile::encodeName(qFilename);
00149
const char *filename = cFilename.data();
00150
00151
int fd = open( filename, O_RDONLY);
00152
if (fd < 0)
00153
return false;
00154
00155
struct stat buff;
00156
if ( fstat( fd, &buff) < 0 )
00157 {
00158 ::close( fd );
00159
return false;
00160 }
00161
00162
QCString cBackup;
00163
if ( backupDir.isEmpty() )
00164 cBackup = cFilename;
00165
else
00166 {
00167
QCString nameOnly;
00168
int slash = cFilename.findRev(
'/');
00169
if (slash < 0)
00170 nameOnly = cFilename;
00171
else
00172 nameOnly = cFilename.mid(slash + 1);
00173 cBackup = QFile::encodeName(backupDir);
00174
if ( backupDir[backupDir.length()-1] !=
'/' )
00175 cBackup +=
'/';
00176 cBackup += nameOnly;
00177 }
00178 cBackup += QFile::encodeName(backupExtension);
00179
const char *backup = cBackup.data();
00180
int permissions = buff.st_mode & 07777;
00181
00182
if ( stat( backup, &buff) == 0)
00183 {
00184
if ( unlink( backup ) != 0 )
00185 {
00186 ::close(fd);
00187
return false;
00188 }
00189 }
00190
00191 mode_t old_umask = umask(0);
00192
int fd2 = open( backup, O_WRONLY | O_CREAT | O_EXCL, permissions | S_IWUSR);
00193 umask(old_umask);
00194
00195
if ( fd2 < 0 )
00196 {
00197 ::close(fd);
00198
return false;
00199 }
00200
00201
char buffer[ 32*1024 ];
00202
00203
while( 1 )
00204 {
00205
int n = ::read( fd, buffer, 32*1024 );
00206
if (n == -1)
00207 {
00208
if (errno == EINTR)
00209
continue;
00210 ::close(fd);
00211 ::close(fd2);
00212
return false;
00213 }
00214
if (n == 0)
00215
break;
00216
00217
if (write_all( fd2, buffer, n))
00218 {
00219 ::close(fd);
00220 ::close(fd2);
00221
return false;
00222 }
00223 }
00224
00225 ::close( fd );
00226
00227
if (::close(fd2))
00228
return false;
00229
return true;
00230 }