usr/src/boot/sys/boot/common/ls.c

   1 /*
   2  * $NetBSD: ls.c,v 1.3 1997/06/13 13:48:47 drochner Exp $
   3  */
   4
   5 /*
   6  * Copyright (c) 1993
   7  *      The Regents of the University of California.  All rights reserved.
   8  * Copyright (c) 1996
   9  *      Matthias Drochner.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 #include <sys/cdefs.h>
  41
  42 #include <sys/param.h>
  43 #include <ufs/ufs/dinode.h>
  44 #include <ufs/ufs/dir.h>
  45
  46 #include <stand.h>
  47 #include <string.h>
  48
  49 #include "bootstrap.h"
  50
  51 static char typestr[] = "?fc?d?b? ?l?s?w";
  52
  53 static int      ls_getdir(char **pathp);
  54
  55 COMMAND_SET(ls, "ls", "list files", command_ls);
  56
  57 static int
  58 command_ls(int argc, char *argv[])
  59 {
  60     int         fd;
  61     struct stat sb;
  62     struct      dirent *d;
  63     char        *buf, *path;
  64     char        lbuf[128];              /* one line */
  65     int         result, ch;
  66     int         verbose;
  67
  68     result = CMD_OK;
  69     fd = -1;
  70     verbose = 0;
  71     optind = 1;
  72     optreset = 1;
  73     while ((ch = getopt(argc, argv, "l")) != -1) {
  74         switch (ch) {
  75         case 'l':
  76             verbose = 1;
  77             break;
  78         case '?':
  79         default:
  80             /* getopt has already reported an error */
  81             return (CMD_OK);
  82         }
  83     }
  84     argv += (optind - 1);
  85     argc -= (optind - 1);
  86
  87     if (argc < 2) {
  88         path = "";
  89     } else {
  90         path = argv[1];
  91     }
  92
  93     if (stat(path, &sb) == 0 && !S_ISDIR(sb.st_mode)) {
  94         if (verbose) {
  95             printf(" %c %8d %s\n",
  96             typestr[sb.st_mode >> 12],
  97             (int)sb.st_size, path);
  98         } else {
  99             printf(" %c  %s\n",
 100             typestr[sb.st_mode >> 12], path);
 101         }
 102         return (CMD_OK);
 103     }
 104
 105     fd = ls_getdir(&path);
 106     if (fd == -1) {
 107         result = CMD_ERROR;
 108         goto out;
 109     }
 110     pager_open();
 111     pager_output(path);
 112     pager_output("\n");
 113
 114     while ((d = readdirfd(fd)) != NULL) {
 115         if (strcmp(d->d_name, ".") && strcmp(d->d_name, "..")) {
 116             if (d->d_type == 0 || verbose) {
 117                 /* stat the file, if possible */
 118                 sb.st_size = 0;
 119                 sb.st_mode = 0;
 120                 buf = malloc(strlen(path) + strlen(d->d_name) + 2);
 121                 if (buf != NULL) {
 122                     sprintf(buf, "%s/%s", path, d->d_name);
 123                     /* ignore return, could be symlink, etc. */
 124                     if (stat(buf, &sb)) {
 125                         sb.st_size = 0;
 126                         sb.st_mode = 0;
 127                     }
 128                     free(buf);
 129                 }
 130             }
 131             if (verbose) {
 132                 snprintf(lbuf, sizeof (lbuf), " %c %8d %s\n",
 133                     typestr[d->d_type? d->d_type:sb.st_mode >> 12],
 134                     (int)sb.st_size, d->d_name);
 135             } else {
 136                 snprintf(lbuf, sizeof (lbuf), " %c  %s\n",
 137                     typestr[d->d_type? d->d_type:sb.st_mode >> 12], d->d_name);
 138             }
 139             if (pager_output(lbuf))
 140                 goto out;
 141         }
 142     }
 143  out:
 144     pager_close();
 145     if (fd != -1)
 146         close(fd);
 147     free(path);         /* ls_getdir() did allocate path */
 148     return (result);
 149 }
 150
 151 /*
 152  * Given (path) containing a vaguely reasonable path specification, return an fd
 153  * on the directory, and an allocated copy of the path to the directory.
 154  */
 155 static int
 156 ls_getdir(char **pathp)
 157 {
 158     struct stat sb;
 159     int         fd;
 160     const char  *cp;
 161     char        *path;
 162
 163     fd = -1;
 164
 165     /* one extra byte for a possible trailing slash required */
 166     path = malloc(strlen(*pathp) + 2);
 167     if (path == NULL) {
 168         snprintf(command_errbuf, sizeof (command_errbuf),
 169             "out of memory");
 170         goto out;
 171     }
 172
 173     strcpy(path, *pathp);
 174
 175     /* Make sure the path is respectable to begin with */
 176     if (archsw.arch_getdev(NULL, path, &cp)) {
 177         snprintf(command_errbuf, sizeof (command_errbuf),
 178             "bad path '%s'", path);
 179         goto out;
 180     }
 181
 182     /* If there's no path on the device, assume '/' */
 183     if (*cp == 0)
 184         strcat(path, "/");
 185
 186     fd = open(path, O_RDONLY);
 187     if (fd < 0) {
 188         snprintf(command_errbuf, sizeof (command_errbuf),
 189             "open '%s' failed: %s", path, strerror(errno));
 190         goto out;
 191     }
 192     if (fstat(fd, &sb) < 0) {
 193         snprintf(command_errbuf, sizeof (command_errbuf),
 194             "stat failed: %s", strerror(errno));
 195         goto out;
 196     }
 197     if (!S_ISDIR(sb.st_mode)) {
 198         snprintf(command_errbuf, sizeof (command_errbuf),
 199             "%s: %s", path, strerror(ENOTDIR));
 200         goto out;
 201     }
 202
 203     *pathp = path;
 204     return (fd);
 205
 206  out:
 207     free(path);
 208     *pathp = NULL;
 209     if (fd != -1)
 210         close(fd);
 211     return (-1);
 212 }