示例#1
0
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;}
示例#2
0
文件: psfxtable.c 项目: legionus/kbd
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;
}