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ls.c revision 1.2 
      1 /*
      2  * $NetBSD: ls.c,v 1.2 2006/04/22 07:58:53 cherry 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 /* __FBSDID("$FreeBSD: src/sys/boot/common/ls.c,v 1.11 2003/08/25 23:30:41 obrien Exp $"); */
     42 
     43 
     44 #include <sys/param.h>
     45 #include <ufs/ufs/dinode.h>
     46 #include <ufs/ufs/dir.h>
     47 #include <sys/dirent.h>
     48 
     49 #include <lib/libsa/stand.h>
     50 
     51 #include "bootstrap.h"
     52 
     53 static char typestr[] = "?fc?d?b? ?l?s?w";
     54 
     55 static int	ls_getdir(char **pathp);
     56 
     57 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     fd = ls_getdir(&path);
     94     if (fd == -1) {
     95 	result = CMD_ERROR;
     96 	goto out;
     97     }
     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 = alloc(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 = alloc(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     fd = open(path, O_RDONLY);
    161     if (fd < 0) {
    162 	sprintf(command_errbuf, "open '%s' failed: %s", path, strerror(errno));
    163 	goto out;
    164     }
    165     if (fstat(fd, &sb) < 0) {
    166 	sprintf(command_errbuf, "stat failed: %s", strerror(errno));
    167 	goto out;
    168     }
    169     if (!S_ISDIR(sb.st_mode)) {
    170 	sprintf(command_errbuf, "%s: %s", path, strerror(ENOTDIR));
    171 	goto out;
    172     }
    173 
    174     *pathp = path;
    175     return(fd);
    176 
    177  out:
    178     free(path);
    179     *pathp = NULL;
    180     if (fd != -1)
    181 	close(fd);
    182     return(-1);
    183 }
    184