int sfs_read(int fd, int start, int length, char *buffer){
if(DEBUG) printf("%d\n",44);
int blockOffset = start % super.blockSize;
if(blockOffset + length > super.blockSize)
return -1;
//get open file table
inode** oft; //open file table
char* oft_buffer = malloc(sizeof(char)*super.blockSize);
if(DEBUG) printf("%d\n",45);
int ret = get_block( super.openFileTable_loc, oft_buffer);
if (ret < 0) {
free(oft_buffer);
return ret;} //super not initialized?
oft = malloc(sizeof(inode*));
int oft_size = read_itable( oft_buffer, oft, super.blockSize);
if(DEBUG) printf("%d\n",46);
free(oft_buffer);
if (oft_size < 0) {
free(oft);
return -1;} //read failed?
if(DEBUG) printf("%d\n",47);
if ( fd < 0 || fd >= oft_size) {//verify fd range
free(*oft);
free(oft);
return -1;}
if(DEBUG) printf("%d\n",48);
if( (*oft)[fd].type == 1){ //cant read dir like file
free(*oft);
free(oft);
return -1;}
if(DEBUG) printf("%d\n",49);
if( (*oft)[fd].size < start + length){ //file is not that big
free(*oft);
free(oft);
return -1;}
//everything's good, we can can read the fd'th element
char* block = malloc(sizeof(char)*super.blockSize);
ret = get_block( (*oft)[fd].index + blockOffset, block);
if(DEBUG) printf("%d\n",50);
free(*oft);
free(oft);
if( ret < 0){
free(block);
return ret;}
if(DEBUG) printf("%d\n",51);
int i;
for(i = 0; i < length; i++)
buffer[i] = block[start + i];
free(block);
buffer[length] = '\0';
//done
return 0;}
int main(int argc, char **argv)
{
const char *ifname, *ofname, *itname, *otname;
FILE *ifil, *ofil, *itab, *otab;
int psftype, charsize, fontlen, hastable, notable;
int i;
int width = 8, bytewidth, height;
char *inbuf, *fontbuf;
int inbuflth, fontbuflth;
set_progname(argv[0]);
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE_NAME, LOCALEDIR);
textdomain(PACKAGE_NAME);
if (argc == 2 && !strcmp(argv[1], "-V"))
print_version_and_exit();
ifil = ofil = itab = otab = NULL;
ifname = ofname = itname = otname = NULL;
fontbuf = NULL;
notable = 0;
if (!strcmp(get_progname(), "psfaddtable")) {
/* Do not send binary data to stdout without explicit "-" */
if (argc != 4) {
char *u = _("Usage:\n\t%s infont intable outfont\n");
fprintf(stderr, u, get_progname());
exit(EX_USAGE);
}
ifname = argv[1];
itname = argv[2];
ofname = argv[3];
} else if (!strcmp(get_progname(), "psfgettable")) {
if (argc < 2 || argc > 3) {
char *u = _("Usage:\n\t%s infont [outtable]\n");
fprintf(stderr, u, get_progname());
exit(EX_USAGE);
}
ifname = argv[1];
otname = (argc == 3) ? argv[2] : "-";
} else if (!strcmp(get_progname(), "psfstriptable")) {
/* Do not send binary data to stdout without explicit "-" */
if (argc != 3) {
char *u = _("Usage:\n\t%s infont outfont\n");
fprintf(stderr, u, get_progname());
exit(EX_USAGE);
}
ifname = argv[1];
ofname = argv[2];
notable = 1;
} else {
for (i = 1; i < argc; i++) {
if ((!strcmp(argv[i], "-i") || !strcmp(argv[i], "-if")) && i < argc - 1)
ifname = argv[++i];
else if ((!strcmp(argv[i], "-o") || !strcmp(argv[i], "-of")) && i < argc - 1)
ofname = argv[++i];
else if (!strcmp(argv[i], "-it") && i < argc - 1)
itname = argv[++i];
else if (!strcmp(argv[i], "-ot") && i < argc - 1)
otname = argv[++i];
else if (!strcmp(argv[i], "-nt"))
notable = 1;
else
break;
}
if (i < argc || argc <= 1) {
char *u = _("Usage:\n\t%s [-i infont] [-o outfont] "
"[-it intable] [-ot outtable] [-nt]\n");
fprintf(stderr, u, get_progname());
exit(EX_USAGE);
}
}
if (!ifname)
ifname = "-";
if (!strcmp(ifname, "-"))
ifil = stdin;
else {
ifil = fopen(ifname, "r");
if (!ifil) {
perror(ifname);
exit(EX_NOINPUT);
}
}
if (!itname)
/* nothing */;
else if (!strcmp(itname, "-"))
itab = stdin;
else {
itab = fopen(itname, "r");
if (!itab) {
perror(itname);
exit(EX_NOINPUT);
}
}
/* Refuse ifil == itab == stdin ? Perhaps not. */
if (!ofname)
/* nothing */;
else if (!strcmp(ofname, "-"))
ofil = stdout;
else {
ofil = fopen(ofname, "w");
if (!ofil) {
perror(ofname);
exit(EX_CANTCREAT);
}
}
if (!otname)
/* nothing */;
else if (!strcmp(otname, "-"))
otab = stdout;
else {
otab = fopen(otname, "w");
if (!otab) {
perror(otname);
exit(EX_CANTCREAT);
}
}
if (readpsffont(ifil, &inbuf, &inbuflth, &fontbuf, &fontbuflth,
&width, &fontlen, 0,
itab ? NULL : &uclistheads) == -1) {
char *u = _("%s: Bad magic number on %s\n");
fprintf(stderr, u, get_progname(), ifname);
exit(EX_DATAERR);
}
fclose(ifil);
charsize = fontbuflth / fontlen;
bytewidth = (width + 7) / 8;
if (!bytewidth)
bytewidth = 1;
height = charsize / bytewidth;
hastable = (uclistheads != NULL);
if (PSF1_MAGIC_OK((unsigned char *)inbuf)) {
psftype = 1;
} else if (PSF2_MAGIC_OK((unsigned char *)inbuf)) {
psftype = 2;
} else {
char *u = _("%s: psf file with unknown magic\n");
fprintf(stderr, u, get_progname());
exit(EX_DATAERR);
}
if (itab) {
read_itable(itab, fontlen, &uclistheads);
fclose(itab);
}
if (otab) {
struct unicode_list *ul;
struct unicode_seq *us;
const char *sep;
if (!hastable) {
char *u = _("%s: input font does not have an index\n");
fprintf(stderr, u, get_progname());
exit(EX_DATAERR);
}
fprintf(otab,
"#\n# Character table extracted from font %s\n#\n",
ifname);
for (i = 0; i < fontlen; i++) {
fprintf(otab, "0x%03x\t", i);
sep = "";
ul = uclistheads[i].next;
while (ul) {
us = ul->seq;
while (us) {
fprintf(otab, "%sU+%04x", sep, us->uc);
us = us->next;
sep = ", ";
}
ul = ul->next;
sep = " ";
}
fprintf(otab, "\n");
}
fclose(otab);
}
if (ofil) {
writepsffont(ofil, fontbuf, width, height, fontlen, psftype,
notable ? NULL : uclistheads);
fclose(ofil);
}
return EX_OK;
}