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  * $FreeBSD: src/sys/boot/common/ls.c,v 1.11 2003/08/25 23:30:41 obrien Exp $
  40  * $DragonFly: src/sys/boot/common/ls.c,v 1.4 2003/11/10 06:08:31 dillon Exp $
  41  */
  42
  43 #include <sys/param.h>
  44 #include <ufs/ufs/dinode.h>
  45 #include <ufs/ufs/dir.h>
  46
  47 #include <stand.h>
  48 #include <string.h>
  49
  50 #include "bootstrap.h"
  51
  52 static char typestr[] = "?fc?d?b? ?l?s?w";
  53
  54 static int      ls_getdir(char **pathp);
  55
  56 COMMAND_SET(ls, "ls", "list files", command_ls);
  57
  58 static int
  59 command_ls(int argc, char *argv[])
  60 {
  61     int         fd;
  62     struct stat sb;
  63     struct      dirent *d;
  64     char        *buf, *path;
  65     char        lbuf[128];              /* one line */
  66     int         result, ch;
  67     int         verbose;
  68
  69     result = CMD_OK;
  70     fd = -1;
  71     verbose = 0;
  72     optind = 1;
  73     optreset = 1;
  74     while ((ch = getopt(argc, argv, "l")) != -1) {
  75         switch(ch) {
  76         case 'l':
  77             verbose = 1;
  78             break;
  79         case '?':
  80         default:
  81             /* getopt has already reported an error */
  82             return(CMD_OK);
  83         }
  84     }
  85     argv += (optind - 1);
  86     argc -= (optind - 1);
  87
  88     if (argc < 2) {
  89         path = "";
  90     } else {
  91         path = argv[1];
  92     }
  93
  94     fd = ls_getdir(&path);
  95     if (fd == -1) {
  96         result = CMD_ERROR;
  97         goto out;
  98     }
  99     pager_open();
 100     pager_output(path);
 101     pager_output("\n");
 102
 103     while ((d = readdirfd(fd)) != NULL) {
 104         if (strcmp(d->d_name, ".") && strcmp(d->d_name, "..")) {
 105             if (verbose) {
 106                 /* stat the file, if possible */
 107                 sb.st_size = 0;
 108                 buf = malloc(strlen(path) + strlen(d->d_name) + 2);
 109                 sprintf(buf, "%s/%s", path, d->d_name);
 110                 /* ignore return, could be symlink, etc. */
 111                 if (stat(buf, &sb))
 112                     sb.st_size = 0;
 113                 free(buf);
 114                 sprintf(lbuf, " %c %8d %s\n", typestr[d->d_type],
 115                     (int)sb.st_size, d->d_name);
 116             } else {
 117                 sprintf(lbuf, " %c  %s\n", typestr[d->d_type], d->d_name);
 118             }
 119             if (pager_output(lbuf))
 120                 goto out;
 121         }
 122     }
 123  out:
 124     pager_close();
 125     if (fd != -1)
 126         close(fd);
 127     if (path != NULL)
 128         free(path);
 129     return(result);
 130 }
 131
 132 /*
 133  * Given (path) containing a vaguely reasonable path specification, return an fd
 134  * on the directory, and an allocated copy of the path to the directory.
 135  */
 136 static int
 137 ls_getdir(char **pathp)
 138 {
 139     struct stat sb;
 140     int         fd;
 141     const char  *cp;
 142     char        *path, *tail;
 143
 144     tail = NULL;
 145     fd = -1;
 146
 147     /* one extra byte for a possible trailing slash required */
 148     path = malloc(strlen(*pathp) + 2);
 149     strcpy(path, *pathp);
 150
 151     /* Make sure the path is respectable to begin with */
 152     if (archsw.arch_getdev(NULL, path, &cp)) {
 153         sprintf(command_errbuf, "bad path '%s'", path);
 154         goto out;
 155     }
 156
 157     /* If there's no path on the device, assume '/' */
 158     if (*cp == 0)
 159         strcat(path, "/");
 160
 161     fd = open(path, O_RDONLY);
 162     if (fd < 0) {
 163         sprintf(command_errbuf, "open '%s' failed: %s", path, strerror(errno));
 164         goto out;
 165     }
 166     if (fstat(fd, &sb) < 0) {
 167         sprintf(command_errbuf, "stat failed: %s", strerror(errno));
 168         goto out;
 169     }
 170     if (!S_ISDIR(sb.st_mode)) {
 171         sprintf(command_errbuf, "%s: %s", path, strerror(ENOTDIR));
 172         goto out;
 173     }
 174
 175     *pathp = path;
 176     return(fd);
 177
 178  out:
 179     free(path);
 180     *pathp = NULL;
 181     if (fd != -1)
 182         close(fd);
 183     return(-1);
 184 }