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. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * $FreeBSD: src/sys/boot/common/ls.c,v 1.11 2003/08/25 23:30:41 obrien Exp $
  36  */
  37
  38 #include <sys/param.h>
  39 #include <ufs/ufs/dinode.h>
  40 #include <ufs/ufs/dir.h>
  41
  42 #include <stand.h>
  43 #include <string.h>
  44
  45 #include "bootstrap.h"
  46
  47 static char typestr[] = "?fc?d?b? ?l?s?w";
  48
  49 static int      ls_getdir(char **pathp);
  50
  51 COMMAND_SET(ls, "ls", "list files", command_ls);
  52
  53 static int
  54 command_ls(int argc, char *argv[])
  55 {
  56     int         fd;
  57     struct stat sb;
  58     struct      dirent *d;
  59     char        *buf, *path;
  60     char        lbuf[128];              /* one line */
  61     int         result, ch;
  62     int         verbose;
  63
  64     result = CMD_OK;
  65     fd = -1;
  66     verbose = 0;
  67     optind = 1;
  68     optreset = 1;
  69     while ((ch = getopt(argc, argv, "l")) != -1) {
  70         switch(ch) {
  71         case 'l':
  72             verbose = 1;
  73             break;
  74         case '?':
  75         default:
  76             /* getopt has already reported an error */
  77             return(CMD_OK);
  78         }
  79     }
  80     argv += (optind - 1);
  81     argc -= (optind - 1);
  82
  83     if (argc < 2) {
  84         path = "";
  85     } else {
  86         path = argv[1];
  87     }
  88
  89     fd = ls_getdir(&path);
  90     if (fd == -1) {
  91         result = CMD_ERROR;
  92         goto out;
  93     }
  94     pager_open();
  95     pager_output(path);
  96     pager_output("\n");
  97
  98     while ((d = readdirfd(fd)) != NULL) {
  99         if (strcmp(d->d_name, ".") && strcmp(d->d_name, "..")) {
 100             if (verbose) {
 101                 /* stat the file, if possible */
 102                 sb.st_size = 0;
 103                 buf = malloc(strlen(path) + strlen(d->d_name) + 2);
 104                 if (strlen(path) == 0)
 105                     sprintf(buf, "%s", d->d_name);
 106                 else
 107                     sprintf(buf, "%s/%s", path, d->d_name);
 108                 /* ignore return, could be symlink, etc. */
 109                 if (rel_stat(buf, &sb))
 110                     sb.st_size = 0;
 111                 free(buf);
 112                 sprintf(lbuf, " %c %8d %s\n", typestr[d->d_type],
 113                     (int)sb.st_size, d->d_name);
 114             } else {
 115                 sprintf(lbuf, " %c  %s\n", typestr[d->d_type], d->d_name);
 116             }
 117             if (pager_output(lbuf))
 118                 goto out;
 119         }
 120     }
 121  out:
 122     pager_close();
 123     if (fd != -1)
 124         close(fd);
 125     if (path != NULL)
 126         free(path);
 127     return(result);
 128 }
 129
 130 /*
 131  * Given (path) containing a vaguely reasonable path specification, return an fd
 132  * on the directory, and an allocated copy of the path to the directory.
 133  */
 134 static int
 135 ls_getdir(char **pathp)
 136 {
 137     struct stat sb;
 138     int         fd;
 139     const char  *cp;
 140     char        *path;
 141
 142     fd = -1;
 143
 144     /* one extra byte for a possible trailing slash required */
 145     path = malloc(strlen(*pathp) + 2);
 146     strcpy(path, *pathp);
 147
 148     /* Make sure the path is respectable to begin with */
 149     if (archsw.arch_getdev(NULL, path, &cp)) {
 150         snprintf(command_errbuf, sizeof(command_errbuf),
 151             "bad path '%s'", path);
 152         goto out;
 153     }
 154
 155     fd = rel_open(cp, NULL, O_RDONLY);
 156     if (fd < 0) {
 157         snprintf(command_errbuf, sizeof(command_errbuf),
 158             "open '%s' failed: %s", path, strerror(errno));
 159         goto out;
 160     }
 161     if (fstat(fd, &sb) < 0) {
 162         snprintf(command_errbuf, sizeof(command_errbuf),
 163             "stat failed: %s", strerror(errno));
 164         goto out;
 165     }
 166     if (!S_ISDIR(sb.st_mode)) {
 167         snprintf(command_errbuf, sizeof(command_errbuf),
 168             "%s: %s", path, strerror(ENOTDIR));
 169         goto out;
 170     }
 171
 172     *pathp = path;
 173     return(fd);
 174
 175  out:
 176     free(path);
 177     *pathp = NULL;
 178     if (fd != -1)
 179         close(fd);
 180     return(-1);
 181 }