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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 (c) 2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ident "%Z%%M% %I% %E% SMI" /* from SVR4 bnu:expfile.c 2.10 */
#include "uucp.h"
/*
* expand file name expansion is based on first characters
* / -> fully qualified pathname. no
* processing necessary
* ~ -> prepended with login directory
* ~/ -> prepended with Pubdir
* default -> prepended with current directory
* file -> filename to expand
* returns:
* 0 -> ok
* FAIL -> no Wrkdir name available
*/
int
expfile(file)
register char *file;
{
register char *fpart, *up;
uid_t uid;
char user[NAMESIZE], save[MAXFULLNAME];
extern int gninfo(), canPath();
if (strlcpy(save, file, sizeof (save)) >= sizeof (save))
return(FAIL);
if (*file != '/')
if (*file == '~') {
/* find / and copy user part */
for (fpart = save + 1, up = user; *fpart != '\0'
&& *fpart != '/'; fpart++)
*up++ = *fpart;
*up = '\0';
if ((user[0]=='\0') || (gninfo(user, &uid, file) != 0)){
(void) strcpy(file, Pubdir);
}
if (strlen(file) + strlen(fpart) + 1 > (unsigned)MAXFULLNAME)
return(FAIL);
(void) strcat(file, fpart);
} else {
if (strlen(Wrkdir) + strlen(save) + 2 > (unsigned)MAXFULLNAME)
return(FAIL);
(void) sprintf(file, "%s/%s", Wrkdir, save);
if (Wrkdir[0] == '\0')
return(FAIL);
}
if (canPath(file) != 0) { /* I don't think this will ever fail */
(void) strcpy(file, CORRUPTDIR);
return(FAIL);
} else
return(0);
}
/*
* make all necessary directories
* name -> directory to make
* mask -> mask to use during directory creation
* return:
* 0 -> success
* FAIL -> failure
*/
int
mkdirs(name, mask)
mode_t mask;
register char *name;
{
register char *p;
mode_t omask;
char dir[MAXFULLNAME];
strcpy(dir, name);
if (*LASTCHAR(dir) != '/')
(void) strcat(dir, "/");
p = dir + 1;
for (;;) {
if ((p = strchr(p, '/')) == NULL)
return(0);
*p = '\0';
if (DIRECTORY(dir)) {
/* if directory exists and is owned by uucp, child's
permissions should be no more open than parent */
if (__s_.st_uid == UUCPUID)
mask |= ((~__s_.st_mode) & PUB_DIRMODE);
} else {
DEBUG(4, "mkdir - %s\n", dir);
omask = umask(mask);
if (mkdir(dir, PUB_DIRMODE) == FAIL) {
umask(omask);
return (FAIL);
}
umask(omask);
}
*p++ = '/';
}
/* NOTREACHED */
}
/*
* expand file name and check return
* print error if it failed.
* file -> file name to check
* returns:
* 0 -> ok
* FAIL -> if expfile failed
*/
int
ckexpf(file)
char *file;
{
if (expfile(file) == 0)
return(0);
fprintf(stderr, gettext("Illegal filename (%s).\n"), file);
return(FAIL);
}
/*
* make canonical path out of path passed as argument.
*
* Eliminate redundant self-references like // or /./
* (A single terminal / will be preserved, however.)
* Dispose of references to .. in the path names.
* In relative path names, this means that .. or a/../..
* will be treated as an illegal reference.
* In full paths, .. is always allowed, with /.. treated as /
*
* returns:
* 0 -> path is now in canonical form
* FAIL -> relative path contained illegal .. reference
*/
int
canPath(path)
register char *path; /* path is modified in place */
{
register char *to, *fr;
to = fr = path;
if (*fr == '/') *to++ = *fr++;
for (;;) {
/* skip past references to self and validate references to .. */
for (;;) {
if (*fr == '/') {
fr++;
continue;
}
if ((strncmp(fr, "./", 2) == SAME) || EQUALS(fr, ".")) {
fr++;
continue;
}
if ((strncmp(fr, "../", 3) == SAME) || EQUALS(fr, "..")) {
fr += 2;
/* /.. is / */
if (((to - 1) == path) && (*path == '/')) continue;
/* error if no previous component */
if (to <= path) return (FAIL);
/* back past previous component */
while ((--to > path) && (to[-1] != '/'));
continue;
}
break;
}
/*
* What follows is a legitimate component,
* terminated by a null or a /
*/
if (*fr == '\0') break;
while (((*to++ = *fr) != '\0') && (*fr++ != '/'));
}
/* null path is . */
if (to == path) *to++ = '.';
*to = '\0';
return (0);
}
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