Есть функции:
Код: Выделить всё
int openInFile( const char *fileName ){
int inFD;
#ifdef _DEBUG_
printf("DEBUG : openInFile : Opening file %s\n", fileName);
#endif
if( inFD = open( fileName, 0 ) == -1 ){
if( errno == ENOENT ){ // a source file DNE
write( 1, "The file to be backed up, ", 26 );
write( 1, fileName, strlen( fileName ) );
write( 1, ", does not exist.\n", 18 );
}else{ // other error
perror( "open inFD" );
} // if eith
}
return inFD; // returns either > 0 in case of success, or -1 in case of error.
}
int openOutFile( const char *fileName, int flags ){
#ifdef _DEBUG_
printf("DEBUG : openOutFile : Opening file %s\n", fileName);
#endif
int outFD;
if( ( outFD = open( fileName, flags ) ) == -1 ){
if( errno == EEXIST ){ // usually, a path DNE
write( 1, "The backup already contains a file named ", 41 );
write( 1, fileName, strlen( fileName ) );
write( 1, "\n", 1 );
}else{ // other error
perror( "open outFD" );
}
}
return outFD; // returns either > 0 in case of success, or -1 in case of error.
}
int fcp( int inFileDescr, int outFileDescr ){
#ifdef _DEBUG_
printf("DEBUG : fcp : copying file");
#endif
char buf[IO_BUF_SIZE];
int n = 0;
while( ( n = read( inFileDescr, buf, IO_BUF_SIZE ) ) > 0 ){
#ifdef _DEBUG_
printf("DEBUG : fcp : %d characters read", n);
#endif
write( outFileDescr, buf, n );
}
if( n == -1 ){
perror( "fcp : read()" );
}
return n;
}
int setFilePerm( int protoFileDescr, int targetFileDescr, const char *destName ){
struct stat srcStat;
if( fstat( protoFileDescr, &srcStat ) == 0 ){
if( fchmod( targetFileDescr, srcStat.st_mode ) == 0 ){
return 1;
}
}
write( 1, "Permissions have not been set for file ", 38 );
write( 1, destName, strlen( destName ) );
write( 1, "\n", 1 );
return -1;
}
int copyFile( const char *src, const char *dest, const char *spoint, const char *pathBranch, int destFlags ){
int inFD, outFD;
if( ( inFD = openInFile( src ) == -1 ) ){
return -1;
}
buildDirTree( spoint, pathBranch );
#ifdef _DEBUG_
printf("DEBUG : copyFile : Tree built\n");
#endif
if( ( outFD = openOutFile( dest, destFlags ) ) == -1 ){
close( inFD );
return -1;
}
#ifdef _DEBUG_
printf("DEBUG : copyFile : outFD opened\n");
#endif
if( fcp( inFD, outFD ) == -1 ){
return -1;
}
#ifdef _DEBUG_
printf("DEBUG : copyFile : file copied\n");
#endif
if( setFilePerm( inFD, outFD, dest ) == -1 ){
close( inFD );
close( outFD );
return -1;
}
#ifdef _DEBUG_
printf("DEBUG : copyFile : Permissions set\n");
#endif
close( inFD );
close( outFD );
#ifdef _DEBUG_
printf("DEBUG : copyFile : Descriptors closed\n");
#endif
return 0;
}вызываются они вот так:
Код: Выделить всё
void rs( char *file ){
#ifdef _DEBUG_
printf( "rs : %s\n", file );
#endif
struct sepPath sp;
struct stat buf;
char *sourceFile = (char *)calloc( strlen( backupDir ) + strlen( file ), sizeof( char ) );
strcat( sourceFile, backupDir );
strcat( sourceFile, file );
tf = malloc( strlen( sourceFile ) );
strcpy( tf, sourceFile );
splitPath( file, &sp );
if( stat( sourceFile, &buf ) == -1 ){
if( errno == ENOENT ){
write( 1, "The backup does not contain the file, ", 38 );
write( 1, sourceFile, strlen(sourceFile) );
write( 1, ", to be restored.\n", 18 );
}else{
perror( "stat : rs" );
}
return;
}
if( S_ISREG( buf.st_mode ) ){
/* previous version. DO NOT DELETE UNTIL NEW ONE IS FULLY TESTED */
/********************************************************************************/
//if( copyFile( sourceFile, file, sp.dirName, O_CREAT|O_WRONLY|O_TRUNC ) == -1 ){
/********************************************************************************/
if( copyFile( sourceFile, file, "/", sp.dirName, O_CREAT|O_WRONLY|O_TRUNC ) == -1 ){
write( 1, "File ", 5 );
write( 1, sourceFile, strlen( sourceFile ) );
write( 1, " has not been restored due to an internal error.\n", 48 );
perror( "rs : copyFile" );
}
}else if( S_ISDIR( buf.st_mode ) ){
// copyDir( sourceFile, file, sp.dirName );
dirsFIFO = (char**)malloc( sizeof( char * ) );
ftw( tf, fillDirFIFO, 8 ); // 1st pass. Fill a dirsFIFO, do nothing to reg files.
// build a directory tree
int i = 0;
for( i; i < dirsFound - 1; i++ ){
char *dir = (char *)( dirsFIFO[i] + strlen( backupDir ) );
#ifdef _DEBUG_
printf( "DEBUG : rs : dir == %s\n", dir );
#endif
mkdir( dir, 0755 );
//free( dir );
free( dirsFIFO[i] );
}
free( dirsFIFO[i] );
free( dirsFIFO );
ftw( tf, restoreRegs, 8 ); // second pass. Restore all reg files.
}
free( tf );
free( sourceFile );
dirsFound = 1;
} // end of rs()С включенной _DEBUG_ получается такой вывод:
Код: Выделить всё
guest[~]$ ./bush
DEBUG : main : backDir/tmp
DEBUG : main : innitialization passed.
db == /tmp
DEBUG : main : getenv("HOME") == /tmp
DEBUG : main : backupDir == /tmp/backup
bush: rs /tmp/saad/A/x.file
DEBUG : components == 2
DEBUG : components[0] == rs
rs : /tmp/saad/A/x.file
DEBUG : openInFile : Opening file /tmp/backup/tmp/saad/A/x.file
DEBUG : buildDirTree : start point : /
DEBUG : buildDirTree : path : /tmp/saad/A
DEBUG : buildDirTree : realloc (2) passed
DEBUG : buildDirTree : Fuction finished.
DEBUG : copyFile : Tree built
DEBUG : openOutFile : Opening file /tmp/saad/A/x.file
DEBUG : copyFile : outFD opened
.......... тут программа висит ...............А дальше она просто виснет.
. Но могу посоветовать запустить прогу с strace ($strace myprog). Будет видно, на вызове какой системной функции присходит "зависание".
. Если она зацикливается то, наверное, в fcp(){... while( n = read()){...} ... }, явных циклов больше нигде нет.