void casecf(void)
{ /* copy file without change */
FILE *fd;
char *eof, *p;
extern int hpos, esc, po;
/* this may not make much sense in nroff... */
lgf++;
nextf[0] = 0;
if (!skip() && getname()) {
if (strncmp("<<", nextf, 2) != 0) {
if ((fd = fopen(nextf, "r")) == NULL) {
ERROR "can't open file %s", nextf WARN;
done(02);
}
eof = (char *) NULL;
} else { /* current file */
if (pbp > lastpbp || ip) {
ERROR "casecf: not reading from file" WARN;
done(02);
}
eof = &nextf[2];
if (!*eof) {
ERROR "casecf: missing end of input token" WARN;
done(02);
}
p = eof;
while(*++p)
;
*p++ = '\n';
*p = 0;
fd = ifile;
}
} else {
ERROR "casecf: no argument" WARN;
lgf--;
return;
}
lgf--;
/* make it into a clean state, be sure that everything is out */
tbreak();
hpos = po;
esc = 0;
ptesc(); /* to left margin */
esc = un;
ptesc();
ptlead();
ptps();
ptfont();
flusho();
cpout(fd, eof);
ptps();
ptfont();
}
int main()
{
int fsinit = 0;
char input[256];
char *parser;
unsigned short n = 0;
char dirbuf[BLOCK_SIZE];
int i =0;
unsigned short bytes_written;
unsigned int number_of_blocks =0, number_of_inodes=0;
printf("Enter command:\n");
while(1)
{
scanf(" %[^\n]s", input);
parser = strtok(input," ");
if(strcmp(parser, "initfs")==0)
{
char *filepath;
char *num1, *num2;
filepath = strtok(NULL, " ");
num1 = strtok(NULL, " ");
num2 = strtok(NULL, " ");
if(access(filepath, F_OK) != -1)
{
if((fd = open(filepath,O_RDWR,0600))== -1)
{
printf("\n filesystem already exists but open() failed with error [%s]\n",strerror(errno));
return 1;
}
printf("filesystem already exists and the same will be used.\n");
fsinit=1;
}
else
{
if (!num1 || !num2)
printf(" All arguments(path, number of inodes and total number of blocks) have not been entered\n");
else
{
number_of_blocks = atoi(num1);
number_of_inodes = atoi(num2);
if(initialize_fs(filepath,number_of_blocks, number_of_inodes))
{
printf("The file system is initialized\n");
fsinit = 1;
}
else
{
printf("Error initializing file system. Exiting... \n");
return 1;
}
}
}
parser = NULL;
}
else if(strcmp(parser, "mkdir")==0)
{
char *dirname;
if(fsinit == 0)
printf("The file system is not initialized. Please retry after initializing file system\n");
else
{
dirname = strtok(NULL, " ");
if(!dirname)
printf("No directory name entered. Please retry\n");
else
{
unsigned int dirinum = allocateinode();
if(dirinum < 0)
{
printf("Error : ran out of inodes \n");
return 1;
}
mkdirectory(dirname,dirinum);
}
}
parser = NULL;
}
else if(strcmp(parser, "cpin")==0)
{
char *targname;
char *srcname;
if(fsinit == 0)
printf("The file system is not initialized. Please retry after initializing file system\n");
else
{
srcname = strtok(NULL, " ");
targname = strtok(NULL, " ");
if(!srcname || !targname )
printf("Required file names(source and target file names) have not been entered. Please retry\n");
else
{
cpin(srcname,targname);
}
}
parser = NULL;
}
else if(strcmp(parser, "cpout")==0)
{
char *targnameout;
char *srcnameout;
if(fsinit == 0)
printf("The file system is not initialized. Please retry after initializing file system\n");
else
{
srcnameout = strtok(NULL, " ");
targnameout = strtok(NULL, " ");
if(!srcnameout || !srcnameout )
printf("Required file names(source and target file names) have not been entered. Please retry\n");
else
{
cpout(srcnameout,targnameout);
}
}
parser = NULL;
}
else if(strcmp(parser, "q")==0)
{
lseek(fd,BLOCK_SIZE,0);
if((bytes_written =write(fd,&super,BLOCK_SIZE)) < BLOCK_SIZE)
{
printf("\nERROR : error in writing the super block");
return 1;
}
return 0;
}
else
{
printf("\nInvalid command\n ");
}
}
}
