minix/usr.sbin/mkproto/mkproto.c

   1 /* mkproto - make an mkfs prototype     Author: Andrew Cagney */
   2
   3 /* Submitted by: cagney@chook.ua.oz (Andrew Cagney - aka Noid) */
   4
   5 #include <sys/types.h>
   6 #include <sys/stat.h>
   7 #include <minix/minlib.h>
   8 #include <limits.h>
   9 #include <dirent.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <stdio.h>
  13 #include <unistd.h>
  14 #include <assert.h>
  15 #include <err.h>
  16
  17 /* The default values for the prototype file */
  18 #define DEF_UID         2       /* bin */
  19 #define DEF_GID         1       /* daemon group */
  20 #define DEF_PROT        0555    /* a=re */
  21 #define DEF_BLOCKS      360
  22 #define DEF_INODES      63
  23 #define DEF_INDENTSTR   "\t"
  24
  25 #ifndef major
  26 #define major(x) ( (x>>8) & 0377)
  27 #define minor(x) (x & 0377)
  28 #endif
  29
  30 /* Globals. */
  31 int count, origlen, tabs;
  32 int gid, uid, prot, same_uid, same_gid, same_prot, blocks, inodes;
  33 int block_given, inode_given, dprot;
  34 char *indentstr;
  35 char *proto_file, *top;
  36 FILE *outfile;
  37
  38 extern int optind;
  39 extern char *optarg;
  40
  41 int main(int argc, char **argv);
  42 void descend(char *dirname);
  43 void display_attrib(const char *name, struct stat *st);
  44 void usage(char *binname);
  45 void open_outfile(void);
  46
  47 /* Returned by minix_readdir */
  48 #define ME_MAXNAME     256
  49 struct me_dirent {
  50        char d_name[ME_MAXNAME];
  51 };
  52
  53 struct me_dirent *minix_readdir(DIR *, int *n);
  54 void minix_free_readdir(struct me_dirent *md, int n);
  55
  56
  57 /* Compare dirent objects for order */
  58 static int cmp_dirent(const void *d1, const void *d2)
  59 {
  60         struct me_dirent *dp1 = (struct me_dirent *) d1,
  61                 *dp2 = (struct me_dirent *) d2;
  62         return strcmp(dp1->d_name, dp2->d_name);
  63 }
  64
  65 /* Return array of me_dirents. */
  66 struct me_dirent *minix_readdir(DIR *dirp, int *n)
  67 {
  68        struct dirent *rdp;
  69        struct me_dirent *dp;
  70        struct me_dirent *dirents = NULL;
  71        int reserved_dirents = 0;
  72        int entries = 0;
  73
  74        while((rdp = readdir(dirp)) != NULL) {
  75                if(entries >= reserved_dirents) {
  76                        struct me_dirent *newdirents;
  77                        int newreserved = (2*(reserved_dirents+1));
  78                        if(!(newdirents = realloc(dirents, newreserved *
  79                          sizeof(*dirents)))) {
  80                                free(dirents);
  81                                return NULL;
  82                        }
  83                        dirents = newdirents;
  84                        reserved_dirents = newreserved;
  85                }
  86
  87                assert(entries < reserved_dirents);
  88                assert(strlen(rdp->d_name) < sizeof(dp->d_name));
  89                dp = &dirents[entries];
  90                memset(dp, 0, sizeof(*dp));
  91                strcpy(dp->d_name, rdp->d_name);
  92                entries++;
  93        }
  94
  95        /* Assume directories contain at least "." and "..", and
  96         * therefore the array exists.
  97         */
  98        assert(entries > 0);
  99        assert(dirents);
 100
 101        /* normalize (sort) them */
 102        qsort(dirents, entries, sizeof(*dp), cmp_dirent);
 103
 104        /* Return no. of entries. */
 105        *n = entries;
 106
 107        return dirents;
 108 }
 109
 110 void minix_free_readdir(struct me_dirent *md, int n)
 111 {
 112        free(md);
 113 }
 114
 115 int main(argc, argv)
 116 int argc;
 117 char *argv[];
 118 {
 119   char *dir = __UNCONST("");
 120   struct stat st;
 121   int op;
 122
 123   gid = DEF_GID;
 124   uid = DEF_UID;
 125   prot = DEF_PROT;
 126   blocks = DEF_BLOCKS;
 127   inodes = DEF_INODES;
 128   indentstr = __UNCONST(DEF_INDENTSTR);
 129   inode_given = 0;
 130   block_given = 0;
 131   top = 0;
 132   same_uid = 0;
 133   same_gid = 0;
 134   same_prot = 0;
 135   while ((op = getopt(argc, argv, "b:g:i:p:t:u:d:s")) != EOF) {
 136         switch (op) {
 137             case 'b':
 138                 blocks = atoi(optarg);
 139                 block_given = 1;
 140                 break;
 141             case 'g':
 142                 gid = atoi(optarg);
 143                 if (gid == 0) usage(argv[0]);
 144                 same_gid = 0;
 145                 break;
 146             case 'i':
 147                 inodes = atoi(optarg);
 148                 inode_given = 1;
 149                 break;
 150             case 'p':
 151                 sscanf(optarg, "%o", &prot);
 152                 if (prot == 0) usage(argv[0]);
 153                 same_prot = 0;
 154                 break;
 155             case 's':
 156                 same_prot = 1;
 157                 same_uid = 1;
 158                 same_gid = 1;
 159                 break;
 160             case 't':   top = optarg;   break;
 161             case 'u':
 162                 uid = atoi(optarg);
 163                 if (uid == 0) usage(argv[0]);
 164                 same_uid = 0;
 165                 break;
 166             case 'd':   indentstr = optarg;     break;
 167             default:            /* Illegal options */
 168                 usage(argv[0]);
 169         }
 170   }
 171
 172   if (optind >= argc) {
 173         usage(argv[0]);
 174   } else {
 175         dir = argv[optind];
 176         optind++;
 177         proto_file = argv[optind];
 178   }
 179   if (!top) top = dir;
 180   open_outfile();
 181   if (block_given && !inode_given) inodes = (blocks / 3) + 8;
 182   if (!block_given && inode_given) usage(argv[0]);
 183   count = 1;
 184   tabs = 0;
 185   origlen = strlen(dir);
 186
 187   /* Check that it really is a directory */
 188   stat(dir, &st);
 189   if ((st.st_mode & S_IFMT) != S_IFDIR) {
 190         fprintf(stderr, "mkproto: %s must be a directory\n", dir);
 191         usage(argv[0]);
 192   }
 193   fprintf(outfile, "boot\n%d %d\n", blocks, inodes);
 194   display_attrib("", &st);
 195   fprintf(outfile, "\n");
 196   descend(dir);
 197   fprintf(outfile, "$\n");
 198   return(0);
 199 }
 200
 201 /* Output the prototype spec for this directory. */
 202 void descend(dirname)
 203 char *dirname;
 204 {
 205   struct me_dirent *dirents;
 206   DIR *dirp;
 207   char *name, *temp, *tempend;
 208   int i;
 209   struct stat st;
 210   mode_t mode;
 211   int entries = 0, orig_entries;
 212   struct me_dirent *dp;
 213
 214   dirp = opendir(dirname);
 215   if (dirp == NULL) {
 216         fprintf(stderr, "unable to open directory %s\n", dirname);
 217         return;
 218   }
 219   tabs++;
 220   temp = (char *) malloc(sizeof(char) * strlen(dirname) +1 + PATH_MAX);
 221   strcpy(temp, dirname);
 222   strcat(temp, "/");
 223   tempend = &temp[strlen(temp)];
 224
 225   /* read all directory entries */
 226   if(!(dirents = minix_readdir(dirp, &entries)))
 227         errx(1, "minix_readdir failed");
 228   orig_entries = entries;
 229   closedir(dirp);
 230
 231   for (dp = dirents; entries > 0; dp++, entries--) {
 232         name = dp->d_name;
 233
 234         count++;
 235         strcpy(tempend, name);
 236
 237         if (lstat(temp, &st) == -1) {
 238                 fprintf(stderr, "cant get status of '%s' \n", temp);
 239                 continue;
 240         }
 241         if (name[0] == '.' && (name[1] == 0 ||
 242             (name[1] == '.' && name[2] == 0)))
 243                 continue;
 244
 245         display_attrib(name, &st);
 246
 247         mode = st.st_mode & S_IFMT;
 248         if (mode == S_IFDIR) {
 249                 fprintf(outfile, "\n");
 250                 descend(temp);
 251                 for (i = 0; i < tabs; i++) {
 252                         fprintf(outfile, "%s", indentstr);
 253                 }
 254                 fprintf(outfile, "$\n");
 255                 continue;
 256         }
 257         if (mode == S_IFBLK || mode == S_IFCHR) {
 258                 fprintf(outfile, " %d %d\n", major(st.st_rdev), minor(st.st_rdev));
 259                 continue;
 260         }
 261         if (mode == S_IFREG) {
 262                 i = origlen;
 263                 fprintf(outfile, "%s%s", indentstr, top);
 264                 while (temp[i] != '\0') {
 265                         fputc(temp[i], outfile);
 266                         i++;
 267                 }
 268                 fprintf(outfile, "\n");
 269                 continue;
 270         }
 271         if (mode == S_IFLNK) {
 272                 char linkcontent[PATH_MAX];
 273                 memset(linkcontent, 0, sizeof(linkcontent));
 274                 if(readlink(temp, linkcontent, sizeof(linkcontent)) < 0) {
 275                         perror("readlink");
 276                         exit(1);
 277                 }
 278                 fprintf(outfile, "%s%s\n", indentstr, linkcontent);
 279                 continue;
 280         }
 281         fprintf(outfile, " /dev/null");
 282         fprintf(stderr,"File\n\t%s\n has an invalid mode, made empty.\n",temp);
 283   }
 284   free(temp);
 285   minix_free_readdir(dirents, orig_entries);
 286   tabs--;
 287 }
 288
 289
 290 void display_attrib(name, st)
 291 const char *name;
 292 struct stat *st;
 293 {
 294 /* Output the specification for a single file */
 295
 296   int i;
 297
 298   if (same_uid) uid = st->st_uid;
 299   if (same_gid) gid = st->st_gid;
 300   if (same_prot)
 301         prot = st->st_mode & 0777;      /***** This one is a bit shady *****/
 302   for (i = 0; i < tabs; i++) fprintf(outfile, "%s", indentstr);
 303   fprintf(outfile, "%s%s%c%c%c%03o %d %d",
 304         name,
 305         *name == '\0' ? "" : indentstr, /* stop the tab for a null name */
 306         (st->st_mode & S_IFMT) == S_IFDIR ? 'd' :
 307         (st->st_mode & S_IFMT) == S_IFCHR ? 'c' :
 308         (st->st_mode & S_IFMT) == S_IFBLK ? 'b' :
 309         (st->st_mode & S_IFMT) == S_IFLNK ? 's' :
 310         '-',                    /* file type */
 311         (st->st_mode & S_ISUID) ? 'u' : '-',    /* set uid */
 312         (st->st_mode & S_ISGID) ? 'g' : '-',    /* set gid */
 313         prot,
 314         uid,
 315         gid);
 316 }
 317
 318 void usage(binname)
 319 char *binname;
 320 {
 321   fprintf(stderr, "Usage: %s [options] source_directory [prototype_file]\n", binname);
 322   fprintf(stderr, "options:\n");
 323   fprintf(stderr, "   -b n\t\t file system size is n blocks (default %d)\n", DEF_BLOCKS);
 324   fprintf(stderr, "   -d STRING\t define the indentation characters (default %s)\n", "(none)");
 325   fprintf(stderr, "   -g n\t\t use n as the gid on all files (default %d)\n", DEF_GID);
 326   fprintf(stderr, "   -i n\t\t file system gets n i-nodes (default %d)\n", DEF_INODES);
 327   fprintf(stderr, "   -p nnn\t use nnn (octal) as mode on all files (default %o)\n", DEF_PROT);
 328   fprintf(stderr, "   -s  \t\t use the same uid, gid and mode as originals have\n");
 329   fprintf(stderr, "   -t ROOT\t inital path prefix for each entry\n");
 330   fprintf(stderr, "   -u n\t\t use nnn as the uid on all files (default %d)\n", DEF_UID);
 331   exit(1);
 332 }
 333
 334 void open_outfile()
 335 {
 336   if (proto_file == NULL)
 337         outfile = stdout;
 338   else if ((outfile = fopen(proto_file, "w")) == NULL)
 339         fprintf(stderr, "Cannot create %s\n ", proto_file);
 340 }