/* * Make an MSDOS volume label * * Emmet P. Gray			US Army, HQ III Corps & Fort Hood * ...!uunet!uiucuxc!fthood!egray	Attn: AFZF-DE-ENV * fthood!egray@uxc.cso.uiuc.edu	Directorate of Engineering & Housing * 					Environmental Management Office * 					Fort Hood, TX 76544-5057 */#include <stdio.h>#include <ctype.h>#include "msdos.h"#include "patchlevel.h"int fd = -1;				/* the file descriptor for the device */int dir_start;				/* starting sector for directory */int dir_len;				/* length of directory (in sectors) */int dir_entries;			/* number of directory entries */int clus_size;				/* cluster size (in sectors) */char *mcwd;				/* the Current Working Directory */int fat_error;				/* FAT error detected? */main(argc, argv)int argc;char *argv[];{	int entry, slot, fargn, verbose, oops;	char filename[30], *strncpy(), drive, ans[10], *strncat();	char *strcpy(), *fix_mcwd();	unsigned char fixed[12], vol[12];	void exit(), dir_write(), dir_flush(), disk_flush();	struct directory *dir, *dir_read(), *mk_entry();	long time(), now;	fargn = 1;	verbose = 0;	oops = 0;	if (argc > 1) {		if (!strcmp(argv[1], "-v")) {			fargn = 2;			verbose = 1;		}		if (argv[1][0] == '-' && !verbose)			oops++;	}	if (argc < 2 || argv[fargn][1] != ':' || oops) {		fprintf(stderr, "Mtools version %s, dated %s\n", VERSION, DATE);		fprintf(stderr, "Usage: %s [-v] drive:\n", argv[0]);		exit(1);	}	mcwd = fix_mcwd();	drive = argv[fargn][0];	if (islower(drive))		drive = toupper(drive);	if (init(drive, 2)) {		fprintf(stderr, "%s: Cannot initialize '%c:'\n", argv[0], drive);		exit(1);	}					/* see if a label exists and get slot */	slot = -1;	vol[0] = '\0';	for (entry = 0; entry < dir_entries; entry++) {		dir = dir_read(entry);					/* if empty */		if (dir->name[0] == 0x0) {			if (slot < 0)				slot = entry;			break;		}					/* if erased */		if (dir->name[0] == 0xe5) {			if (slot < 0)				slot = entry;			continue;		}					/* if not a volume label */		if (!(dir->attr & 0x08))			continue;		slot = entry;		strncpy((char *) vol, (char *) dir->name, 8);		vol[8] = '\0';		strncat((char *) vol, (char *) dir->ext, 3);		vol[11] = '\0';		printf("Volume in drive %c is \"%s\"\n", drive, vol);		break;	}	if (slot < 0) {		fprintf(stderr, "%s: No directory slots\n", argv[0]);		exit(1);	}	if (vol[0] == '\0')		printf("Volume in drive %c is unlabeled\n", drive);					/* ask for new label */	printf("Enter the new volume label (11 characters): ");	gets(filename);	if (filename[0] != '\0') {		sprintf((char *) fixed, "%-11.11s", filename);		if (strlen(filename) > 11 && verbose)			printf("New label is \"%s\"\n", fixed);	}	else {		if (vol[0] == '\0')			exit(0);		printf("Delete volume label (y/n): ");		gets(ans);		if (ans[0] == 'y' || ans[0] == 'Y') {			strcpy((char *) fixed, (char *) vol);			fixed[0] = 0xe5;		}		else			exit(0);	}					/* make directory entry */	time(&now);	dir = mk_entry(fixed, 0x08, 0, 0L, now);	dir_write(slot, dir);	dir_flush();	disk_flush();	close(fd);	exit(0);}