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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>
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#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.
close())
00107 {
00108
QDir dir;
00109
bool result = dir.
rename( mTempFile.
name(), mFileName);
00110
if ( result )
00111 {
00112
return true;
00113 }
00114 mTempFile.
setError(errno);
00115 }
00116
00117
00118 mTempFile.
unlink();
00119
return false;
00120 }
00121
00122
static int
00123 write_all(
int fd,
const char *buf, size_t len)
00124 {
00125
while (len > 0)
00126 {
00127
int written = write(fd, buf, len);
00128
if (written < 0)
00129 {
00130
if (errno == EINTR)
00131
continue;
00132
return -1;
00133 }
00134 buf += written;
00135 len -= written;
00136 }
00137
return 0;
00138 }
00139
00140 bool KSaveFile::backupFile(
const QString& qFilename,
const QString& backupDir,
00141
const QString& backupExtension)
00142 {
00143
QCString cFilename = QFile::encodeName(qFilename);
00144
const char *filename = cFilename.data();
00145
00146
int fd = open( filename, O_RDONLY);
00147
if (fd < 0)
00148
return false;
00149
00150
struct stat buff;
00151
if ( fstat( fd, &buff) < 0 )
00152 {
00153 ::close( fd );
00154
return false;
00155 }
00156
00157
QCString cBackup;
00158
if ( backupDir.
isEmpty() )
00159 cBackup = cFilename;
00160
else
00161 {
00162
QCString nameOnly;
00163
int slash = cFilename.
findRev(
'/');
00164
if (slash < 0)
00165 nameOnly = cFilename;
00166
else
00167 nameOnly = cFilename.
mid(slash + 1);
00168 cBackup = QFile::encodeName(backupDir);
00169
if ( backupDir[backupDir.
length()-1] !=
'/' )
00170 cBackup +=
'/';
00171 cBackup += nameOnly;
00172 }
00173 cBackup += QFile::encodeName(backupExtension);
00174
const char *backup = cBackup.data();
00175
int permissions = buff.st_mode & 07777;
00176
00177
if ( stat( backup, &buff) == 0)
00178 {
00179
if ( unlink( backup ) != 0 )
00180 {
00181 ::close(fd);
00182
return false;
00183 }
00184 }
00185
00186 mode_t old_umask = umask(0);
00187
int fd2 = open( backup, O_WRONLY | O_CREAT | O_EXCL, permissions | S_IWUSR);
00188 umask(old_umask);
00189
00190
if ( fd2 < 0 )
00191 {
00192 ::close(fd);
00193
return false;
00194 }
00195
00196
char buffer[ 32*1024 ];
00197
00198
while( 1 )
00199 {
00200
int n = ::read( fd, buffer, 32*1024 );
00201
if (n == -1)
00202 {
00203
if (errno == EINTR)
00204
continue;
00205 ::close(fd);
00206 ::close(fd2);
00207
return false;
00208 }
00209
if (n == 0)
00210
break;
00211
00212
if (write_all( fd2, buffer, n))
00213 {
00214 ::close(fd);
00215 ::close(fd2);
00216
return false;
00217 }
00218 }
00219
00220 ::close( fd );
00221
00222
if (::close(fd2))
00223
return false;
00224
return true;
00225 }