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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* convert device to linename (as in /dev/linename)
* return ptr to LSZ-byte string, "?" if not found
* device must be character device
* maintains small list in tlist structure for speed
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include "acctdef.h"
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>
static int tsize1;
static struct tlist {
char tname[LSZ]; /* linename */
dev_t tdev; /* device */
} tl[TSIZE1];
char *strncpy();
dev_t lintodev();
static char dev_dir[] = "/dev";
static char *def_srch_dirs[] = {
"/dev/term",
"/dev/pts",
"/dev/xt",
NULL
};
char file_name[MAX_DEV_PATH]; /* name being returned */
static int srch_dir();
char *
devtolin(dev_t device)
{
struct tlist *tp;
char **srch_dirs; /* priority directories to search first */
int found = 0;
int dirno = 0;
for (tp = tl; tp < &tl[tsize1]; tp++)
if (device == tp->tdev)
return (tp->tname);
srch_dirs = def_srch_dirs;
while ((!found) && (srch_dirs[dirno] != NULL)) {
/*
* if /dev is one of the priority directories we should only
* search its top level for now (set depth = MAX_SEARCH_DEPTH)
*/
found = srch_dir(device, srch_dirs[dirno],
((strcmp(srch_dirs[dirno], dev_dir) == 0) ?
MAX_SRCH_DEPTH : 1), NULL);
dirno++;
}
/*
* if not yet found search remaining /dev directory skipping the
* priority directories
*/
if (!found)
found = srch_dir(device, dev_dir, 0, srch_dirs);
/*
* if found then put it (without the "/dev/" prefix) in the tlist
* structure and return the path name without the "/dev/" prefix
*/
if (found) {
if (tsize1 < TSIZE1) {
tp->tdev = device;
CPYN(tp->tname, file_name+5);
tsize1++;
}
return (file_name+5);
} else {
/*
* if not found put "?" in the tlist structure for that device
* and return "?"
*/
if (tsize1 < TSIZE1) {
tp->tdev = device;
CPYN(tp->tname, "?");
tsize1++;
}
}
return ("?");
}
/*
* Arguments:
* device device we are looking for
* path current path
* depth current depth
* skip_dirs directories that don't need searched
*/
static int
srch_dir(dev_t device, char *path, int depth, char *skip_dirs[])
{
DIR *fdev;
struct dirent *d;
int dirno = 0;
int found = 0;
int path_len;
char *last_comp;
struct stat sb;
/* do we need to search this directory? */
if ((skip_dirs != NULL) && (depth != 0))
while (skip_dirs[dirno] != NULL)
if (strcmp(skip_dirs[dirno++], path) == 0)
return (0);
/* open the directory */
if ((fdev = opendir(path)) == NULL)
return (0);
/* initialize file name using path name */
path_len = strlen(path);
strcpy(file_name, path);
last_comp = file_name + path_len;
*last_comp++ = '/';
/* start searching this directory */
while ((!found) && ((d = readdir(fdev)) != NULL)) {
if (d->d_ino != 0) {
/*
* if name would not be too long append it to
* directory name, otherwise skip this entry
*/
if ((int)(path_len + strlen(d->d_name) + 2) >
MAX_DEV_PATH)
continue;
else
strcpy(last_comp, d->d_name);
/*
* if this directory entry has the device number we
* need, then the name is found. Otherwise if it's a
* directory (not . or ..) and we haven't gone too
* deep, recurse.
*/
if (lintodev(file_name+5) == device) {
found = 1;
break;
} else if ((depth < MAX_SRCH_DEPTH) &&
(strcmp(d->d_name, ".") != 0) &&
(strcmp(d->d_name, "..") != 0) &&
(stat(file_name, &sb) != -1) &&
((sb.st_mode & S_IFMT) == S_IFDIR)) {
found = srch_dir(device, file_name, depth+1,
skip_dirs);
}
}
}
closedir(fdev);
return (found);
}
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