201 lines
6.5 KiB
C
201 lines
6.5 KiB
C
/* Copyright (c) 1993, 1994 Washington University in Saint Louis
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution. 3. All advertising
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* materials mentioning features or use of this software must display the
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* following acknowledgement: This product includes software developed by the
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* Washington University in Saint Louis and its contributors. 4. Neither the
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* name of the University nor the names of its contributors may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASHINGTON UNIVERSITY AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASHINGTON
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* UNIVERSITY OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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char * rcsid = "$Id: acl.c,v 1.2 1999/10/05 21:23:23 he Exp $";
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#endif
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#include "config.h"
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#ifdef SYSSYSLOG
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#include <sys/syslog.h>
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#else
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#include <syslog.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/file.h>
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#include "pathnames.h"
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#include "extensions.h"
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char *aclbuf = NULL;
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static struct aclmember *aclmembers;
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/*************************************************************************/
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/* FUNCTION : getaclentry */
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/* PURPOSE : Retrieve a named entry from the ACL */
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/* ARGUMENTS : pointer to the keyword and a handle to the acl members */
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/* RETURNS : pointer to the acl member containing the keyword or NULL */
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/*************************************************************************/
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struct aclmember *
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#ifdef __STDC__
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getaclentry(char *keyword, struct aclmember **next)
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#else
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getaclentry(keyword,next)
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char *keyword;
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struct aclmember **next;
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#endif
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{
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do {
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if (!*next)
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*next = aclmembers;
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else
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*next = (*next)->next;
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} while (*next && strcmp((*next)->keyword, keyword));
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return (*next);
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}
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/*************************************************************************/
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/* FUNCTION : parseacl */
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/* PURPOSE : Parse the acl buffer into its components */
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/* ARGUMENTS : A pointer to the acl file */
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/* RETURNS : != 0 if error is detected */
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/*************************************************************************/
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int
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#ifdef __STDC__
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parseacl(void)
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#else
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parseacl()
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#endif
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{
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char *ptr,
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*aclptr = aclbuf,
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*line;
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int cnt;
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struct aclmember *member,
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*acltail;
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if (!aclbuf || !(*aclbuf))
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return 1;
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aclmembers = (struct aclmember *) NULL;
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acltail = (struct aclmember *) NULL;
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while (*aclptr != '\0') {
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line = aclptr;
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while (*aclptr && *aclptr != '\n')
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aclptr++;
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*aclptr++ = (char) NULL;
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/* deal with comments */
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if ((ptr = strchr(line, '#')) != NULL)
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/* allowed escaped '#' chars for path-filter (DiB) */
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if (*(ptr-1) != '\\')
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*ptr = '\0';
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ptr = strtok(line, " \t");
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if (ptr) {
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member = (struct aclmember *) calloc(1, sizeof(struct aclmember));
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(void) strcpy(member->keyword, ptr);
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cnt = 0;
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while ((ptr = strtok(NULL, " \t")) != NULL) {
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if (cnt >= MAXARGS) {
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syslog(LOG_ERR,
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"Too many args (>%d) in ftpaccess: %s %s %s %s %s ...",
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MAXARGS - 1, member->keyword, member->arg[0],
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member->arg[1], member->arg[2], member->arg[3]);
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break;
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}
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member->arg[cnt++] = ptr;
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}
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if (acltail)
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acltail->next = member;
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acltail = member;
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if (!aclmembers)
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aclmembers = member;
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}
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}
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return 0;
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}
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/*************************************************************************/
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/* FUNCTION : readacl */
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/* PURPOSE : Read the acl into memory */
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/* ARGUMENTS : The pathname of the acl */
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/* RETURNS : 0 if error, 1 if no error */
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/*************************************************************************/
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int
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#ifdef __STDC__
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readacl(char *aclpath)
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#else
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readacl(aclpath)
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char *aclpath;
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#endif
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{
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FILE *aclfile;
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struct stat finfo;
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extern int use_accessfile;
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if (!use_accessfile)
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return (0);
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if ((aclfile = fopen(aclpath, "r")) == NULL) {
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syslog(LOG_ERR, "cannot open access file %s: %s", aclpath,
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strerror(errno));
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return (0);
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}
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if (fstat(fileno(aclfile), &finfo) != 0) {
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syslog(LOG_ERR, "cannot fstat access file %s: %s", aclpath,
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strerror(errno));
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(void) fclose(aclfile);
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return (0);
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}
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if (finfo.st_size == 0) {
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aclbuf = (char *) calloc(1, 1);
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} else {
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if (!(aclbuf = (char *)malloc((unsigned) finfo.st_size + 1))) {
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syslog(LOG_ERR, "could not malloc aclbuf (%d bytes)", finfo.st_size + 1);
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(void) fclose(aclfile);
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return (0);
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}
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if (!fread(aclbuf, (size_t) finfo.st_size, 1, aclfile)) {
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syslog(LOG_ERR, "error reading acl file %s: %s", aclpath,
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strerror(errno));
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aclbuf = NULL;
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(void) fclose(aclfile);
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return (0);
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}
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*(aclbuf + finfo.st_size) = '\0';
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}
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(void) fclose(aclfile);
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return (1);
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}
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