ufs_ls.c

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    1 /*      $NetBSD: ufs_ls.c,v 1.8 2004/03/24 16:21:06 drochner Exp $       */
    2 
    3 /*
    4  * Copyright (c) 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 /*
   33  * Copyright (c) 1996
   34  *      Matthias Drochner.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  *
   45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   55  */
   56 
   57 
   58 #include <sys/param.h>
   59 #include <lib/libkern/libkern.h>
   60 #include <ufs/ufs/dinode.h>
   61 #include <ufs/ufs/dir.h>
   62 
   63 #include "stand.h"
   64 #include "ufs.h"
   65 
   66 #define NELEM(x) (sizeof (x) / sizeof(*x))
   67 
   68 typedef struct entry_t entry_t;
   69 struct entry_t {
   70         entry_t *e_next;
   71         ino_t   e_ino;
   72         uint8_t e_type;
   73         char    e_name[1];
   74 };
   75 
   76 static const char    *const typestr[] = {
   77         "unknown",
   78         "FIFO",
   79         "CHR",
   80         0,
   81         "DIR",
   82         0,
   83         "BLK",
   84         0,
   85         "REG",
   86         0,
   87         "LNK",
   88         0,
   89         "SOCK",
   90         0,
   91         "WHT"
   92 };
   93 
   94 static int
   95 fn_match(const char *fname, const char *pattern)
   96 {
   97         char fc, pc;
   98 
   99         do {
  100                 fc = *fname++;
  101                 pc = *pattern++;
  102                 if (!fc && !pc)
  103                         return 1;
  104                 if (pc == '?' && fc)
  105                         pc = fc;
  106         } while (fc == pc);
  107 
  108         if (pc != '*')
  109                 return 0;
  110         /* Too hard (and unnecessary really) too check for "*?name" etc....
  111            "**" will look for a '*' and "*?" a '?' */
  112         pc = *pattern++;
  113         if (!pc)
  114                 return 1;
  115         while ((fname = strchr(fname, pc)))
  116                 if (fn_match(++fname, pattern))
  117                         return 1;
  118         return 0;
  119 }
  120 
  121 void 
  122 ufs_ls(const char *path)
  123 {
  124         int             fd;
  125         struct stat     sb;
  126         size_t          size;
  127         char            dirbuf[DIRBLKSIZ];
  128         const char      *fname = 0;
  129         char            *p;
  130         entry_t         *names = 0, *n, **np;
  131 
  132         if ((fd = open(path, 0)) < 0
  133             || fstat(fd, &sb) < 0
  134             || (sb.st_mode & IFMT) != IFDIR) {
  135                 /* Path supplied isn't a directory, open parent
  136                    directory and list matching files. */
  137                 if (fd >= 0)
  138                         close(fd);
  139                 fname = strrchr(path, '/');
  140                 if (fname) {
  141                         size = fname - path;
  142                         p = alloc(size + 1);
  143                         if (!p)
  144                                 goto out;
  145                         memcpy(p, path, size);
  146                         p[size] = 0;
  147                         fd = open(p, 0);
  148                         free(p, size + 1);
  149                 } else {
  150                         fd = open("", 0);
  151                         fname = path;
  152                 }
  153 
  154                 if (fd < 0) {
  155                         printf("ls: %s\n", strerror(errno));
  156                         return;
  157                 }
  158                 if (fstat(fd, &sb) < 0) {
  159                         printf("stat: %s\n", strerror(errno));
  160                         goto out;
  161                 }
  162                 if ((sb.st_mode & IFMT) != IFDIR) {
  163                         printf("%s: %s\n", path, strerror(ENOTDIR));
  164                         goto out;
  165                 }
  166         }
  167 
  168         while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ) {
  169                 struct direct  *dp, *edp;
  170 
  171                 dp = (struct direct *) dirbuf;
  172                 edp = (struct direct *) (dirbuf + size);
  173 
  174                 for (; dp < edp; dp = (void *)((char *)dp + dp->d_reclen)) {
  175                         const char *t;
  176                         if (dp->d_ino ==  0)
  177                                 continue;
  178 
  179                         if (dp->d_type >= NELEM(typestr) ||
  180                             !(t = typestr[dp->d_type])) {
  181                                 /*
  182                                  * This does not handle "old"
  183                                  * filesystems properly. On little
  184                                  * endian machines, we get a bogus
  185                                  * type name if the namlen matches a
  186                                  * valid type identifier. We could
  187                                  * check if we read namlen "" and
  188                                  * handle this case specially, if
  189                                  * there were a pressing need...
  190                                  */
  191                                 printf("bad dir entry\n");
  192                                 goto out;
  193                         }
  194                         if (fname && !fn_match(dp->d_name, fname))
  195                                 continue;
  196                         n = alloc(sizeof *n + strlen(dp->d_name));
  197                         if (!n) {
  198                                 printf("%d: %s (%s)\n",
  199                                         dp->d_ino, dp->d_name, t);
  200                                 continue;
  201                         }
  202                         n->e_ino = dp->d_ino;
  203                         n->e_type = dp->d_type;
  204                         strcpy(n->e_name, dp->d_name);
  205                         for (np = &names; *np; np = &(*np)->e_next) {
  206                                 if (strcmp(n->e_name, (*np)->e_name) < 0)
  207                                         break;
  208                         }
  209                         n->e_next = *np;
  210                         *np = n;
  211                 }
  212         }
  213 
  214         if (names) {
  215                 do {
  216                         n = names;
  217                         printf("%d: %s (%s)\n",
  218                                 n->e_ino, n->e_name, typestr[n->e_type]);
  219                         names = n->e_next;
  220                         free(n, 0);
  221                 } while (names);
  222         } else {
  223                 printf( "%s not found\n", path );
  224         }
  225 out:
  226         close(fd);
  227 }

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FreeBSD/Linux Kernel Cross Reference sys/lib/libsa/ufs_ls.c

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sys/lib/libsa/ufs_ls.c