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  * 4. 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  * $DragonFly: src/sys/boot/common/ls.c,v 1.5 2008/09/02 17:21:12 dillon Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <ufs/ufs/dinode.h>
  41 #include <ufs/ufs/dir.h>
  42
  43 #include <stand.h>
  44 #include <string.h>
  45
  46 #include "bootstrap.h"
  47
  48 static char typestr[] = "?fc?d?b? ?l?s?w";
  49
  50 static int      ls_getdir(char **pathp);
  51
  52 COMMAND_SET(ls, "ls", "list files", command_ls);
  53
  54 static int
  55 command_ls(int argc, char *argv[])
  56 {
  57     int         fd;
  58     struct stat sb;
  59     struct      dirent *d;
  60     char        *buf, *path;
  61     char        lbuf[128];              /* one line */
  62     int         result, ch;
  63     int         verbose;
  64
  65     result = CMD_OK;
  66     fd = -1;
  67     verbose = 0;
  68     optind = 1;
  69     optreset = 1;
  70     while ((ch = getopt(argc, argv, "l")) != -1) {
  71         switch(ch) {
  72         case 'l':
  73             verbose = 1;
  74             break;
  75         case '?':
  76         default:
  77             /* getopt has already reported an error */
  78             return(CMD_OK);
  79         }
  80     }
  81     argv += (optind - 1);
  82     argc -= (optind - 1);
  83
  84     if (argc < 2) {
  85         path = "";
  86     } else {
  87         path = argv[1];
  88     }
  89
  90     fd = ls_getdir(&path);
  91     if (fd == -1) {
  92         result = CMD_ERROR;
  93         goto out;
  94     }
  95     pager_open();
  96     pager_output(path);
  97     pager_output("\n");
  98
  99     while ((d = readdirfd(fd)) != NULL) {
 100         if (strcmp(d->d_name, ".") && strcmp(d->d_name, "..")) {
 101             if (verbose) {
 102                 /* stat the file, if possible */
 103                 sb.st_size = 0;
 104                 buf = malloc(strlen(path) + strlen(d->d_name) + 2);
 105                 sprintf(buf, "%s/%s", path, d->d_name);
 106                 /* ignore return, could be symlink, etc. */
 107                 if (rel_stat(buf, &sb))
 108                     sb.st_size = 0;
 109                 free(buf);
 110                 sprintf(lbuf, " %c %8d %s\n", typestr[d->d_type],
 111                     (int)sb.st_size, d->d_name);
 112             } else {
 113                 sprintf(lbuf, " %c  %s\n", typestr[d->d_type], d->d_name);
 114             }
 115             if (pager_output(lbuf))
 116                 goto out;
 117         }
 118     }
 119  out:
 120     pager_close();
 121     if (fd != -1)
 122         close(fd);
 123     if (path != NULL)
 124         free(path);
 125     return(result);
 126 }
 127
 128 /*
 129  * Given (path) containing a vaguely reasonable path specification, return an fd
 130  * on the directory, and an allocated copy of the path to the directory.
 131  */
 132 static int
 133 ls_getdir(char **pathp)
 134 {
 135     struct stat sb;
 136     int         fd;
 137     const char  *cp;
 138     char        *path;
 139
 140     fd = -1;
 141
 142     /* one extra byte for a possible trailing slash required */
 143     path = malloc(strlen(*pathp) + 2);
 144     strcpy(path, *pathp);
 145
 146     /* Make sure the path is respectable to begin with */
 147     if (archsw.arch_getdev(NULL, path, &cp)) {
 148         sprintf(command_errbuf, "bad path '%s'", path);
 149         goto out;
 150     }
 151
 152     fd = rel_open(cp, NULL, O_RDONLY);
 153     if (fd < 0) {
 154         sprintf(command_errbuf, "open '%s' failed: %s", path, strerror(errno));
 155         goto out;
 156     }
 157     if (fstat(fd, &sb) < 0) {
 158         sprintf(command_errbuf, "stat failed: %s", strerror(errno));
 159         goto out;
 160     }
 161     if (!S_ISDIR(sb.st_mode)) {
 162         sprintf(command_errbuf, "%s: %s", path, strerror(ENOTDIR));
 163         goto out;
 164     }
 165
 166     *pathp = path;
 167     return(fd);
 168
 169  out:
 170     free(path);
 171     *pathp = NULL;
 172     if (fd != -1)
 173         close(fd);
 174     return(-1);
 175 }