mirror of
https://git.FreeBSD.org/src.git
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407 lines
9.3 KiB
C
407 lines
9.3 KiB
C
/*
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* Copyright (c) 1999, Boris Popov
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <pwd.h>
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#include <unistd.h>
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#include <netncp/ncp_lib.h>
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#include <netncp/ncp_rcfile.h>
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#include <netncp/ncp_cfg.h>
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#define NWFS_CFG_FILE NCP_PREFIX"/etc/nwfs.conf"
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struct rcfile *ncp_rc = NULL;
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SLIST_HEAD(rcfile_head, rcfile);
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static struct rcfile_head pf_head = {NULL};
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int rc_merge(char *filename,struct rcfile **rcfile);
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static struct rcfile* rc_find(char *filename);
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static struct rcsection *rc_findsect(struct rcfile *rcp, char *sectname);
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static struct rcsection *rc_addsect(struct rcfile *rcp, char *sectname);
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static int rc_sect_free(struct rcsection *rsp);
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static struct rckey *rc_sect_findkey(struct rcsection *rsp, char *keyname);
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static struct rckey *rc_sect_addkey(struct rcsection *rsp, char *name, char *value);
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static void rc_key_free(struct rckey *p);
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static void rc_parse(struct rcfile *rcp);
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/*
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* open rcfile and load its content, if already open - return previous handle
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*/
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int
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rc_open(char *filename,char *mode,struct rcfile **rcfile) {
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struct rcfile *rcp;
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FILE *f;
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rcp = rc_find(filename);
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if( rcp ) {
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*rcfile = rcp;
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return 0;
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}
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f = fopen (filename, mode);
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if (f==NULL)
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return errno;
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rcp = malloc(sizeof(struct rcfile));
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if (rcp==NULL) {
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fclose(f);
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return ENOMEM;
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}
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bzero(rcp, sizeof(struct rcfile));
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rcp->rf_name = strdup (filename);
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rcp->rf_f = f;
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SLIST_INSERT_HEAD(&pf_head, rcp, rf_next);
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rc_parse(rcp);
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*rcfile = rcp;
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return 0;
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}
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int
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rc_merge(char *filename,struct rcfile **rcfile) {
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struct rcfile *rcp = *rcfile;
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FILE *f, *t;
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if (rcp == NULL) {
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return rc_open(filename,"r",rcfile);
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}
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f = fopen (filename, "r");
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if (f==NULL)
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return errno;
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t = rcp->rf_f;
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rcp->rf_f = f;
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rc_parse(rcp);
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rcp->rf_f = t;
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fclose(f);
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return 0;
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}
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int
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rc_close(struct rcfile *rcp) {
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struct rcsection *p,*n;
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fclose(rcp->rf_f);
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for(p = SLIST_FIRST(&rcp->rf_sect);p;) {
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n = p;
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p = SLIST_NEXT(p,rs_next);
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rc_sect_free(n);
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}
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free(rcp->rf_name);
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SLIST_REMOVE(&pf_head, rcp, rcfile, rf_next);
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free(rcp);
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return 0;
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}
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static struct rcfile*
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rc_find(char *filename) {
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struct rcfile *p;
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SLIST_FOREACH(p, &pf_head, rf_next)
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if (strcmp (filename, p->rf_name)==0)
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return p;
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return 0;
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}
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static struct rcsection *
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rc_findsect(struct rcfile *rcp, char *sectname) {
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struct rcsection *p;
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SLIST_FOREACH(p, &rcp->rf_sect, rs_next)
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if (strcmp(p->rs_name, sectname)==0)
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return p;
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return NULL;
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}
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static struct rcsection *
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rc_addsect(struct rcfile *rcp, char *sectname) {
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struct rcsection *p;
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p = rc_findsect(rcp, sectname);
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if (p) return p;
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p = malloc(sizeof(*p));
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if (!p) return NULL;
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p->rs_name = strdup(sectname);
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SLIST_INIT(&p->rs_keys);
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SLIST_INSERT_HEAD(&rcp->rf_sect, p, rs_next);
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return p;
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}
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static int
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rc_sect_free(struct rcsection *rsp) {
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struct rckey *p,*n;
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for(p = SLIST_FIRST(&rsp->rs_keys);p;) {
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n = p;
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p = SLIST_NEXT(p,rk_next);
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rc_key_free(n);
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}
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free(rsp->rs_name);
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free(rsp);
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return 0;
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}
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static struct rckey *
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rc_sect_findkey(struct rcsection *rsp, char *keyname) {
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struct rckey *p;
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SLIST_FOREACH(p, &rsp->rs_keys, rk_next)
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if (strcmp(p->rk_name, keyname)==0)
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return p;
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return NULL;
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}
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static struct rckey *
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rc_sect_addkey(struct rcsection *rsp, char *name, char *value) {
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struct rckey *p;
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p = rc_sect_findkey(rsp, name);
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if (p) {
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free(p->rk_value);
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} else {
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p = malloc(sizeof(*p));
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if (!p) return NULL;
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SLIST_INSERT_HEAD(&rsp->rs_keys, p, rk_next);
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p->rk_name = strdup(name);
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}
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p->rk_value = value ? strdup(value) : strdup("");
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return p;
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}
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void
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rc_sect_delkey(struct rcsection *rsp, struct rckey *p) {
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SLIST_REMOVE(&rsp->rs_keys,p,rckey,rk_next);
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rc_key_free(p);
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return;
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}
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static void
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rc_key_free(struct rckey *p){
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free(p->rk_value);
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free(p->rk_name);
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free(p);
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}
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enum { stNewLine, stHeader, stSkipToEOL, stGetKey, stGetValue};
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static void
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rc_parse(struct rcfile *rcp) {
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FILE *f = rcp->rf_f;
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int state = stNewLine, c;
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struct rcsection *rsp = NULL;
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struct rckey *rkp = NULL;
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char buf[2048];
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char *next = buf, *last = &buf[sizeof(buf)-1];
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while ((c = getc (f)) != EOF) {
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if (c == '\r')
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continue;
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if (state == stNewLine) {
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next = buf;
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if (isspace(c))
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continue; /* skip leading junk */
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if (c == '[') {
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state = stHeader;
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rsp = NULL;
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continue;
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}
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if (c == '#' || c == ';') {
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state = stSkipToEOL;
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} else { /* something meaningfull */
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state = stGetKey;
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}
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}
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if (state == stSkipToEOL || next == last) {/* ignore long lines */
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if (c == '\n'){
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state = stNewLine;
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next = buf;
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}
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continue;
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}
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if (state == stHeader) {
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if (c == ']') {
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*next = 0;
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next = buf;
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rsp = rc_addsect(rcp, buf);
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state = stSkipToEOL;
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} else
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*next++ = c;
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continue;
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}
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if (state == stGetKey) {
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if (c == ' ' || c == '\t')/* side effect: 'key name='*/
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continue; /* become 'keyname=' */
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if (c == '\n') { /* silently ignore ... */
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state = stNewLine;
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continue;
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}
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if (c != '=') {
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*next++ = c;
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continue;
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}
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*next = 0;
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if (rsp == NULL) {
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fprintf(stderr, "Key '%s' defined before section\n", buf);
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state = stSkipToEOL;
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continue;
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}
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rkp = rc_sect_addkey(rsp, buf, NULL);
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next = buf;
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state = stGetValue;
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continue;
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}
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/* only stGetValue left */
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if (state != stGetValue) {
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fprintf(stderr, "Well, I can't parse file '%s'\n",rcp->rf_name);
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state = stSkipToEOL;
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}
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if (c != '\n') {
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*next++ = c;
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continue;
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}
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*next = 0;
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rkp->rk_value = strdup(buf);
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state = stNewLine;
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rkp = NULL;
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} /* while */
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if (c == EOF && state == stGetValue) {
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*next = 0;
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rkp->rk_value = strdup(buf);
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}
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return;
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}
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int
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rc_getstringptr(struct rcfile *rcp,char *section, char *key,char **dest) {
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struct rcsection *rsp;
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struct rckey *rkp;
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*dest = NULL;
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rsp = rc_findsect(rcp, section);
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if (!rsp) return ENOENT;
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rkp = rc_sect_findkey(rsp,key);
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if (!rkp) return ENOENT;
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*dest = rkp->rk_value;
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return 0;
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}
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int
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rc_getstring(struct rcfile *rcp,char *section, char *key,int maxlen,char *dest) {
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char *value;
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int error;
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error = rc_getstringptr(rcp, section, key, &value);
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if (error) return error;
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if (strlen(value) >= maxlen) {
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fprintf(stderr, "line too long for key '%s' in section '%s', max = %d\n",key, section, maxlen);
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return EINVAL;
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}
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strcpy(dest,value);
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return 0;
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}
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int
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rc_getint(struct rcfile *rcp,char *section, char *key,int *value) {
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struct rcsection *rsp;
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struct rckey *rkp;
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rsp = rc_findsect(rcp, section);
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if (!rsp) return ENOENT;
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rkp = rc_sect_findkey(rsp,key);
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if (!rkp) return ENOENT;
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errno = 0;
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*value = strtol(rkp->rk_value,NULL,0);
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if (errno) {
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fprintf(stderr, "invalid int value '%s' for key '%s' in section '%s'\n",rkp->rk_value,key,section);
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return errno;
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}
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return 0;
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}
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/*
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* 1,yes,true
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* 0,no,false
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*/
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int
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rc_getbool(struct rcfile *rcp,char *section, char *key,int *value) {
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struct rcsection *rsp;
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struct rckey *rkp;
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char *p;
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rsp = rc_findsect(rcp, section);
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if (!rsp) return ENOENT;
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rkp = rc_sect_findkey(rsp,key);
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if (!rkp) return ENOENT;
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p = rkp->rk_value;
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while (*p && isspace(*p)) p++;
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if (*p == '0' || strcasecmp(p,"no") == 0 || strcasecmp(p,"false") == 0) {
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*value = 0;
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return 0;
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}
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if (*p == '1' || strcasecmp(p,"yes") == 0 || strcasecmp(p,"true") == 0) {
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*value = 1;
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return 0;
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}
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fprintf(stderr, "invalid boolean value '%s' for key '%s' in section '%s' \n",p, key, section);
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return EINVAL;
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}
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/*
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* first read ~/.nwfsrc, next try to merge NWFS_CFG_FILE
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*/
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int
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ncp_open_rcfile(void) {
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char *home, *fn;
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int error;
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home = getenv("HOME");
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if (home) {
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fn = malloc(strlen(home) + 20);
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sprintf(fn, "%s/.nwfsrc", home);
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error = rc_open(fn,"r",&ncp_rc);
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free (fn);
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}
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error = rc_merge(NWFS_CFG_FILE, &ncp_rc);
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if( ncp_rc == NULL ) {
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printf("Warning: no cfg files found.\n");
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return 1;
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}
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return 0;
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}
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