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- /*
- * Make a MSDOS sub directory
- *
- * Emmet P. Gray US Army, HQ III Corps & Fort Hood
- * ...!ihnp4!uiucuxc!fthood!egray Attn: AFZF-DE-ENV
- * Directorate of Engineering & Housing
- * Environmental Management Office
- * Fort Hood, TX 76544-5057
- */
-
- #include <stdio.h>
- #include "msdos.h"
-
- int fd; /* the file descriptor for the floppy */
- int dir_start; /* starting sector for directory */
- int dir_len; /* length of directory (in sectors) */
- int dir_entries; /* number of directory entries */
- int dir_chain[25]; /* chain of sectors in directory */
- int clus_size; /* cluster size (in sectors) */
- int fat_len; /* length of FAT table (in sectors) */
- int num_clus; /* number of available clusters */
- unsigned char *fatbuf; /* the File Allocation Table */
- char *mcwd; /* the Current Working Directory */
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- int entry, slot, fat, dot, subdir();
- char *filename, *newfile, *fixname(), *strncpy(), *unixname();
- char *getpath(), *pathname, tname[9], text[4], *fixed;
- void exit();
- struct directory *dir, *search(), *mk_entry();
-
- if (init(2)) {
- fprintf(stderr, "mmd: Cannot initialize diskette\n");
- exit(1);
- }
- /* only 1 directory ! */
- if (argc != 2) {
- fprintf(stderr, "Usage: mmd <MSDOS directory>\n");
- exit(1);
- }
- fixed = fixname(argv[1]);
- filename = unixname(fixed, fixed+8);
- pathname = getpath(argv[1]);
- if (strcmp(fixed+8, " ")) {
- fprintf(stderr, "mmd: Directory names cannot have extensions\n");
- exit(1);
- }
- if (subdir(pathname))
- exit(1);
- /* see if exists and get slot */
- slot = -1;
- dot = 0;
- for (entry=0; entry<dir_entries; entry++) {
- dir = search(entry);
- /* if empty */
- if (dir->name[0] == NULL) {
- if (slot < 0)
- slot = entry;
- break;
- }
- /* if erased */
- if (dir->name[0] == 0xe5) {
- if (slot < 0)
- slot = entry;
- continue;
- }
- /* if not a directory */
- if (!(dir->attr & 0x10))
- continue;
- strncpy(tname, dir->name, 8);
- strncpy(text, dir->ext, 3);
- newfile = unixname(tname, text);
- /* save the 'dot' directory info */
- if (!strcmp(".", newfile))
- dot = dir->start[1]*0x100 + dir->start[0];
-
- if (!strcmp(filename, newfile)) {
- fprintf(stderr, "mmd: Directory '%s' already exists\n", filename);
- exit(1);
- }
- }
- /* no '.' entry means root directory */
- if (dot == 0 && slot < 0) {
- printf(stderr, "mmd: No directory slots\n");
- exit(1);
- }
- /* make the directory grow */
- if (dot && slot < 0) {
- if (grow(dot)) {
- fprintf(stderr, "mmd: Disk full\n");
- exit(1);
- }
- /* first slot in 'new' directory */
- slot = entry;
- }
- fat = nextfat(0);
- if (fat == -1) {
- fprintf(stderr, "mmd: Disk full\n");
- exit(1);
- }
- /* make directory entry */
- dir = mk_entry(fixed, 0x10, fat, 0);
- if (dir != NULL) {
- writedir(slot, dir);
- /* write the cluster */
- putfat(fat, 0xfff);
- putcluster(fat, dot);
- }
- /* write FAT sectors */
- writefat();
- close(fd);
- exit(0);
- }
-
- putcluster(dot, dot_dot) /* write the cluster */
- int dot;
- int dot_dot;
- {
- long start;
- void exit(), perror();
- int buflen;
- static struct directory dirs[32];
- struct directory *mk_entry();
-
- start = (dot - 2)*clus_size + dir_start + dir_len;
- move(start);
-
- buflen = clus_size * MSECSIZ;
- /* make the '.' and '..' entries */
- dirs[0] = *mk_entry(". ", 0x10, dot, 0);
- dirs[1] = *mk_entry(".. ", 0x10, dot_dot, 0);
-
- if (write(fd, (char *) &dirs[0], buflen) != buflen) {
- perror("putcluster: write");
- exit(1);
- }
- return;
- }
-
- int
- nextfat(last) /* returns next free cluster */
- int last;
- {
- static int i;
-
- for (i=last+1; i<num_clus+2; i++) {
- if (!getfat(i))
- return(i);
- }
- return(-1);
- }
-