Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ypldap/parse.y	Lines:	0	263	0.0 %
Date:	2017-11-07	Branches:	0	205	0.0 %


/*	$OpenBSD: parse.y,v 1.23 2017/08/28 06:00:05 florian Exp $	*/

/*
 * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org>
 * Copyright (c) 2007, 2008 Reyk Floeter <reyk@openbsd.org>
 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
 * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
 * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
 * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
 * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

%{
#include <sys/types.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <sys/tree.h>
#include <sys/socket.h>
#include <sys/stat.h>

#include <netinet/in.h>
#include <arpa/inet.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>

#include "ypldap.h"

TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
static struct file {
	TAILQ_ENTRY(file)	 entry;
	FILE			*stream;
	char			*name;
	int			 lineno;
	int			 errors;
} *file, *topfile;
struct file	*pushfile(const char *, int);
int		 popfile(void);
int		 check_file_secrecy(int, const char *);
int		 yyparse(void);
int		 yylex(void);
int		 yyerror(const char *, ...)
    __attribute__((__format__ (printf, 1, 2)))
    __attribute__((__nonnull__ (1)));
int		 kw_cmp(const void *, const void *);
int		 lookup(char *);
int		 lgetc(int);
int		 lungetc(int);
int		 findeol(void);

TAILQ_HEAD(symhead, sym)	 symhead = TAILQ_HEAD_INITIALIZER(symhead);
struct sym {
	TAILQ_ENTRY(sym)	 entry;
	int			 used;
	int			 persist;
	char			*nam;
	char			*val;
};
int		 symset(const char *, const char *, int);
char		*symget(const char *);

struct env		*conf = NULL;
struct idm		*idm = NULL;
static int		 errors = 0;

typedef struct {
	union {
		int64_t		 number;
		char		*string;
	} v;
	int lineno;
} YYSTYPE;

%}

%token	SERVER FILTER ATTRIBUTE BASEDN BINDDN GROUPDN BINDCRED MAPS CHANGE DOMAIN PROVIDE
%token	USER GROUP TO EXPIRE HOME SHELL GECOS UID GID INTERVAL
%token	PASSWD NAME FIXED LIST GROUPNAME GROUPPASSWD GROUPGID MAP
%token	INCLUDE DIRECTORY CLASS PORT ERROR GROUPMEMBERS LDAPS TLS CAFILE
%token	<v.string>	STRING
%token  <v.number>	NUMBER
%type	<v.number>	opcode attribute
%type	<v.number>	port
%type	<v.number>	ssl

%%

grammar		: /* empty */
		| grammar '\n'
		| grammar include '\n'
		| grammar varset '\n'
		| grammar directory '\n'
		| grammar main '\n'
		| grammar error '\n'			{ file->errors++; }
		;

nl		: '\n' optnl
		;

optnl		: '\n' optnl
		| /* empty */
		;


include		: INCLUDE STRING			{
			struct file	*nfile;

			if ((nfile = pushfile($2, 0)) == NULL) {
				yyerror("failed to include file %s", $2);
				free($2);
				YYERROR;
			}
			free($2);

			file = nfile;
			lungetc('\n');
		}
		;

varset		: STRING '=' STRING			{
			char *s = $1;
			while (*s++) {
				if (isspace((unsigned char)*s)) {
					yyerror("macro name cannot contain "
					    "whitespace");
					YYERROR;
				}
			}
			if (symset($1, $3, 0) == -1)
				fatal("cannot store variable");
			free($1);
			free($3);
		}
		;

port		: PORT STRING				{
			struct servent *servent;

			servent = getservbyname($2, "tcp");
			if (servent == NULL) {
				yyerror("port %s is invalid", $2);
				free($2);
				YYERROR;
			}
			$$ = ntohs(servent->s_port);
			free($2);
		}
		| PORT NUMBER				{
			if ($2 <= 0 || $2 > (int)USHRT_MAX) {
				yyerror("invalid port: %lld", $2);
				YYERROR;
			}
			$$ = $2;
		}
		| /* empty */				{
			$$ = 0;
		}
		;

opcode		: GROUP					{ $$ = 0; }
		| PASSWD				{ $$ = 1; }
		;


attribute	: NAME					{ $$ = 0; }
		| PASSWD				{ $$ = 1; }
		| UID					{ $$ = 2; }
		| GID					{ $$ = 3; }
		| CLASS					{ $$ = 4; }
		| CHANGE				{ $$ = 5; }
		| EXPIRE				{ $$ = 6; }
		| GECOS					{ $$ = 7; }
		| HOME					{ $$ = 8; }
		| SHELL					{ $$ = 9; }
		| GROUPNAME				{ $$ = 10; }
		| GROUPPASSWD				{ $$ = 11; }
		| GROUPGID				{ $$ = 12; }
		| GROUPMEMBERS				{ $$ = 13; }
		;

diropt		: BINDDN STRING				{
			idm->idm_flags |= F_NEEDAUTH;
			if (strlcpy(idm->idm_binddn, $2,
			    sizeof(idm->idm_binddn)) >=
			    sizeof(idm->idm_binddn)) {
				yyerror("directory binddn truncated");
				free($2);
				YYERROR;
			}
			free($2);
		}
		| BINDCRED STRING			{
			idm->idm_flags |= F_NEEDAUTH;
			if (strlcpy(idm->idm_bindcred, $2,
			    sizeof(idm->idm_bindcred)) >=
			    sizeof(idm->idm_bindcred)) {
				yyerror("directory bindcred truncated");
				free($2);
				YYERROR;
			}
			free($2);
		}
		| BASEDN STRING			{
			if (strlcpy(idm->idm_basedn, $2,
			    sizeof(idm->idm_basedn)) >=
			    sizeof(idm->idm_basedn)) {
				yyerror("directory basedn truncated");
				free($2);
				YYERROR;
			}
			free($2);
		}
		| GROUPDN STRING		{
			if(strlcpy(idm->idm_groupdn, $2,
			    sizeof(idm->idm_groupdn)) >=
			    sizeof(idm->idm_groupdn)) {
				yyerror("directory groupdn truncated");
				free($2);
				YYERROR;
			}
			free($2);
		}
		| opcode FILTER STRING			{
			if (strlcpy(idm->idm_filters[$1], $3,
			    sizeof(idm->idm_filters[$1])) >=
			    sizeof(idm->idm_filters[$1])) {
				yyerror("filter truncated");
				free($3);
				YYERROR;
			}
			free($3);
		}
		| ATTRIBUTE attribute MAPS TO STRING	{
			if (strlcpy(idm->idm_attrs[$2], $5,
			    sizeof(idm->idm_attrs[$2])) >=
			    sizeof(idm->idm_attrs[$2])) {
				yyerror("attribute truncated");
				free($5);
				YYERROR;
			}
			free($5);
		}
		| FIXED ATTRIBUTE attribute STRING	{
			if (strlcpy(idm->idm_attrs[$3], $4,
			    sizeof(idm->idm_attrs[$3])) >=
			    sizeof(idm->idm_attrs[$3])) {
				yyerror("attribute truncated");
				free($4);
				YYERROR;
			}
			idm->idm_flags |= F_FIXED_ATTR($3);
			free($4);
		}
		| LIST attribute MAPS TO STRING	{
			if (strlcpy(idm->idm_attrs[$2], $5,
			    sizeof(idm->idm_attrs[$2])) >=
			    sizeof(idm->idm_attrs[$2])) {
				yyerror("attribute truncated");
				free($5);
				YYERROR;
			}
			idm->idm_list |= F_LIST($2);
			free($5);
		}
		;

ssl		: /* empty */				{ $$ = 0; }
		| LDAPS					{ $$ = F_SSL; }
		| TLS					{ $$ = F_STARTTLS; }
		;

directory	: DIRECTORY STRING port ssl {
			if ((idm = calloc(1, sizeof(*idm))) == NULL)
				fatal(NULL);
			idm->idm_id = conf->sc_maxid++;

			if (strlcpy(idm->idm_name, $2,
			    sizeof(idm->idm_name)) >=
			    sizeof(idm->idm_name)) {
				yyerror("attribute truncated");
				free($2);
				YYERROR;
			}
			free($2);

			idm->idm_port = $3;

			if ($4 != 0) {
				if (tls_init()) {
					yyerror("tls init failed");
					YYERROR;
				}

				idm->idm_flags |= $4;
				idm->idm_tls_config = tls_config_new();
				if (idm->idm_tls_config == NULL) {
					yyerror("tls config failed");
					YYERROR;
				}

				if (tls_config_set_protocols(
				    idm->idm_tls_config,
				    TLS_PROTOCOLS_ALL) == -1) {
					yyerror("tls set protocols failed: %s",
					    tls_config_error(
					    idm->idm_tls_config));
					tls_config_free(idm->idm_tls_config);
					idm->idm_tls_config = NULL;
					YYERROR;
				}
				if (tls_config_set_ciphers(idm->idm_tls_config,
				    "compat") == -1) {
					yyerror("tls set ciphers failed: %s",
					    tls_config_error(
					    idm->idm_tls_config));
					tls_config_free(idm->idm_tls_config);
					idm->idm_tls_config = NULL;
					YYERROR;
				}

				if (tls_config_set_ca_file(idm->idm_tls_config,
				    conf->sc_cafile) == -1) {
					yyerror("tls set CA bundle failed: %s",
					    tls_config_error(
					    idm->idm_tls_config));
					tls_config_free(idm->idm_tls_config);
					idm->idm_tls_config = NULL;
					YYERROR;
				}
			}

		} '{' optnl diropts '}'			{
			TAILQ_INSERT_TAIL(&conf->sc_idms, idm, idm_entry);
			idm = NULL;
		}
		;

main		: INTERVAL NUMBER			{
			conf->sc_conf_tv.tv_sec = $2;
			conf->sc_conf_tv.tv_usec = 0;
		}
		| DOMAIN STRING				{
			if (strlcpy(conf->sc_domainname, $2,
			    sizeof(conf->sc_domainname)) >=
			    sizeof(conf->sc_domainname)) {
				yyerror("domainname truncated");
				free($2);
				YYERROR;
			}
			free($2);
		}
		| PROVIDE MAP STRING			{
			if (strcmp($3, "passwd.byname") == 0)
				conf->sc_flags |= YPMAP_PASSWD_BYNAME;
			else if (strcmp($3, "passwd.byuid") == 0)
				conf->sc_flags |= YPMAP_PASSWD_BYUID;
			else if (strcmp($3, "master.passwd.byname") == 0)
				conf->sc_flags |= YPMAP_MASTER_PASSWD_BYNAME;
			else if (strcmp($3, "master.passwd.byuid") == 0)
				conf->sc_flags |= YPMAP_MASTER_PASSWD_BYUID;
			else if (strcmp($3, "group.byname") == 0)
				conf->sc_flags |= YPMAP_GROUP_BYNAME;
			else if (strcmp($3, "group.bygid") == 0)
				conf->sc_flags |= YPMAP_GROUP_BYGID;
			else if (strcmp($3, "netid.byname") == 0)
				conf->sc_flags |= YPMAP_NETID_BYNAME;
			else {
				yyerror("unsupported map type: %s", $3);
				free($3);
				YYERROR;
			}
			free($3);
		}
		| CAFILE STRING				{
			free(conf->sc_cafile);
			conf->sc_cafile = $2;
		}
		;

diropts		: diropts diropt nl
		| diropt optnl
		;

%%

struct keywords {
	const char	*k_name;
	int		 k_val;
};

int
yyerror(const char *fmt, ...)
{
	va_list		 ap;
	char		*msg;

	file->errors++;
	va_start(ap, fmt);
	if (vasprintf(&msg, fmt, ap) == -1)
		fatalx("yyerror vasprintf");
	va_end(ap);
	logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
	free(msg);
	return (0);
}

int
kw_cmp(const void *k, const void *e)
{
	return (strcmp(k, ((const struct keywords *)e)->k_name));
}

int
lookup(char *s)
{
	/* this has to be sorted always */
	static const struct keywords keywords[] = {
		{ "attribute",		ATTRIBUTE },
		{ "basedn",		BASEDN },
		{ "bindcred",		BINDCRED },
		{ "binddn",		BINDDN },
		{ "cafile",		CAFILE },
		{ "change",		CHANGE },
		{ "class",		CLASS },
		{ "directory",		DIRECTORY },
		{ "domain",		DOMAIN },
		{ "expire",		EXPIRE },
		{ "filter",		FILTER },
		{ "fixed",		FIXED },
		{ "gecos",		GECOS },
		{ "gid",		GID },
		{ "group",		GROUP },
		{ "groupdn",		GROUPDN },
		{ "groupgid",		GROUPGID },
		{ "groupmembers",	GROUPMEMBERS },
		{ "groupname",		GROUPNAME },
		{ "grouppasswd",	GROUPPASSWD },
		{ "home",		HOME },
		{ "include",		INCLUDE },
		{ "interval",		INTERVAL },
		{ "ldaps",		LDAPS },
		{ "list",		LIST },
		{ "map",		MAP },
		{ "maps",		MAPS },
		{ "name",		NAME },
		{ "passwd",		PASSWD },
		{ "port",		PORT },
		{ "provide",		PROVIDE },
		{ "server",		SERVER },
		{ "shell",		SHELL },
		{ "tls",		TLS },
		{ "to",			TO },
		{ "uid",		UID },
		{ "user",		USER },
	};
	const struct keywords	*p;

	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
	    sizeof(keywords[0]), kw_cmp);

	if (p)
		return (p->k_val);
	else
		return (STRING);
}

#define MAXPUSHBACK	128

u_char	*parsebuf;
int	 parseindex;
u_char	 pushback_buffer[MAXPUSHBACK];
int	 pushback_index = 0;

int
lgetc(int quotec)
{
	int		c, next;

	if (parsebuf) {
		/* Read character from the parsebuffer instead of input. */
		if (parseindex >= 0) {
			c = parsebuf[parseindex++];
			if (c != '\0')
				return (c);
			parsebuf = NULL;
		} else
			parseindex++;
	}

	if (pushback_index)
		return (pushback_buffer[--pushback_index]);

	if (quotec) {
		if ((c = getc(file->stream)) == EOF) {
			yyerror("reached end of file while parsing "
			    "quoted string");
			if (file == topfile || popfile() == EOF)
				return (EOF);
			return (quotec);
		}
		return (c);
	}

	while ((c = getc(file->stream)) == '\\') {
		next = getc(file->stream);
		if (next != '\n') {
			c = next;
			break;
		}
		yylval.lineno = file->lineno;
		file->lineno++;
	}

	while (c == EOF) {
		if (file == topfile || popfile() == EOF)
			return (EOF);
		c = getc(file->stream);
	}
	return (c);
}

int
lungetc(int c)
{
	if (c == EOF)
		return (EOF);
	if (parsebuf) {
		parseindex--;
		if (parseindex >= 0)
			return (c);
	}
	if (pushback_index < MAXPUSHBACK-1)
		return (pushback_buffer[pushback_index++] = c);
	else
		return (EOF);
}

int
findeol(void)
{
	int	c;

	parsebuf = NULL;

	/* skip to either EOF or the first real EOL */
	while (1) {
		if (pushback_index)
			c = pushback_buffer[--pushback_index];
		else
			c = lgetc(0);
		if (c == '\n') {
			file->lineno++;
			break;
		}
		if (c == EOF)
			break;
	}
	return (ERROR);
}

int
yylex(void)
{
	u_char	 buf[8096];
	u_char	*p, *val;
	int	 quotec, next, c;
	int	 token;

top:
	p = buf;
	while ((c = lgetc(0)) == ' ' || c == '\t')
		; /* nothing */

	yylval.lineno = file->lineno;
	if (c == '#')
		while ((c = lgetc(0)) != '\n' && c != EOF)
			; /* nothing */
	if (c == '$' && parsebuf == NULL) {
		while (1) {
			if ((c = lgetc(0)) == EOF)
				return (0);

			if (p + 1 >= buf + sizeof(buf) - 1) {
				yyerror("string too long");
				return (findeol());
			}
			if (isalnum(c) || c == '_') {
				*p++ = c;
				continue;
			}
			*p = '\0';
			lungetc(c);
			break;
		}
		val = symget(buf);
		if (val == NULL) {
			yyerror("macro '%s' not defined", buf);
			return (findeol());
		}
		parsebuf = val;
		parseindex = 0;
		goto top;
	}

	switch (c) {
	case '\'':
	case '"':
		quotec = c;
		while (1) {
			if ((c = lgetc(quotec)) == EOF)
				return (0);
			if (c == '\n') {
				file->lineno++;
				continue;
			} else if (c == '\\') {
				if ((next = lgetc(quotec)) == EOF)
					return (0);
				if (next == quotec || c == ' ' || c == '\t')
					c = next;
				else if (next == '\n') {
					file->lineno++;
					continue;
				} else
					lungetc(next);
			} else if (c == quotec) {
				*p = '\0';
				break;
			} else if (c == '\0') {
				yyerror("syntax error");
				return (findeol());
			}
			if (p + 1 >= buf + sizeof(buf) - 1) {
				yyerror("string too long");
				return (findeol());
			}
			*p++ = c;
		}
		yylval.v.string = strdup(buf);
		if (yylval.v.string == NULL)
			err(1, "yylex: strdup");
		return (STRING);
	}

#define allowed_to_end_number(x) \
	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')

	if (c == '-' || isdigit(c)) {
		do {
			*p++ = c;
			if ((unsigned)(p-buf) >= sizeof(buf)) {
				yyerror("string too long");
				return (findeol());
			}
		} while ((c = lgetc(0)) != EOF && isdigit(c));
		lungetc(c);
		if (p == buf + 1 && buf[0] == '-')
			goto nodigits;
		if (c == EOF || allowed_to_end_number(c)) {
			const char *errstr = NULL;

			*p = '\0';
			yylval.v.number = strtonum(buf, LLONG_MIN,
			    LLONG_MAX, &errstr);
			if (errstr) {
				yyerror("\"%s\" invalid number: %s",
				    buf, errstr);
				return (findeol());
			}
			return (NUMBER);
		} else {
nodigits:
			while (p > buf + 1)
				lungetc(*--p);
			c = *--p;
			if (c == '-')
				return (c);
		}
	}

#define allowed_in_string(x) \
	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
	x != '{' && x != '}' && x != '<' && x != '>' && \
	x != '!' && x != '=' && x != '#' && \
	x != ','))

	if (isalnum(c) || c == ':' || c == '_') {
		do {
			*p++ = c;
			if ((unsigned)(p-buf) >= sizeof(buf)) {
				yyerror("string too long");
				return (findeol());
			}
		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
		lungetc(c);
		*p = '\0';
		if ((token = lookup(buf)) == STRING)
			if ((yylval.v.string = strdup(buf)) == NULL)
				err(1, "yylex: strdup");
		return (token);
	}
	if (c == '\n') {
		yylval.lineno = file->lineno;
		file->lineno++;
	}
	if (c == EOF)
		return (0);
	return (c);
}

int
check_file_secrecy(int fd, const char *fname)
{
	struct stat	st;

	if (fstat(fd, &st)) {
		log_warn("cannot stat %s", fname);
		return (-1);
	}
	if (st.st_uid != 0 && st.st_uid != getuid()) {
		log_warnx("%s: owner not root or current user", fname);
		return (-1);
	}
	if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
		log_warnx("%s: group writable or world read/writable", fname);
		return (-1);
	}
	return (0);
}

struct file *
pushfile(const char *name, int secret)
{
	struct file	*nfile;

	if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
		log_warn("malloc");
		return (NULL);
	}
	if ((nfile->name = strdup(name)) == NULL) {
		log_warn("malloc");
		free(nfile);
		return (NULL);
	}
	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
		log_warn("%s", nfile->name);
		free(nfile->name);
		free(nfile);
		return (NULL);
	} else if (secret &&
	    check_file_secrecy(fileno(nfile->stream), nfile->name)) {
		fclose(nfile->stream);
		free(nfile->name);
		free(nfile);
		return (NULL);
	}
	nfile->lineno = 1;
	TAILQ_INSERT_TAIL(&files, nfile, entry);
	return (nfile);
}

int
popfile(void)
{
	struct file	*prev;

	if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
		prev->errors += file->errors;

	TAILQ_REMOVE(&files, file, entry);
	fclose(file->stream);
	free(file->name);
	free(file);
	file = prev;
	return (file ? 0 : EOF);
}

int
parse_config(struct env *x_conf, const char *filename, int opts)
{
	struct sym	*sym, *next;

	conf = x_conf;
	bzero(conf, sizeof(*conf));

	TAILQ_INIT(&conf->sc_idms);
	conf->sc_conf_tv.tv_sec = DEFAULT_INTERVAL;
	conf->sc_conf_tv.tv_usec = 0;
	conf->sc_cafile = strdup(YPLDAP_CERT_FILE);
	if (conf->sc_cafile == NULL) {
		log_warn("malloc");
		return (-1);
	}

	errors = 0;

	if ((file = pushfile(filename, 1)) == NULL) {
		return (-1);
	}
	topfile = file;

	/*
	 * parse configuration
	 */
	setservent(1);
	yyparse();
	endservent();
	errors = file->errors;
	popfile();

	/* Free macros and check which have not been used. */
	TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
		if ((opts & YPLDAP_OPT_VERBOSE) && !sym->used)
			fprintf(stderr, "warning: macro '%s' not "
			    "used\n", sym->nam);
		if (!sym->persist) {
			free(sym->nam);
			free(sym->val);
			TAILQ_REMOVE(&symhead, sym, entry);
			free(sym);
		}
	}

	if (errors) {
		return (-1);
	}

	return (0);
}

int
symset(const char *nam, const char *val, int persist)
{
	struct sym	*sym;

	TAILQ_FOREACH(sym, &symhead, entry) {
		if (strcmp(nam, sym->nam) == 0)
			break;
	}

	if (sym != NULL) {
		if (sym->persist == 1)
			return (0);
		else {
			free(sym->nam);
			free(sym->val);
			TAILQ_REMOVE(&symhead, sym, entry);
			free(sym);
		}
	}
	if ((sym = calloc(1, sizeof(*sym))) == NULL)
		return (-1);

	sym->nam = strdup(nam);
	if (sym->nam == NULL) {
		free(sym);
		return (-1);
	}
	sym->val = strdup(val);
	if (sym->val == NULL) {
		free(sym->nam);
		free(sym);
		return (-1);
	}
	sym->used = 0;
	sym->persist = persist;
	TAILQ_INSERT_TAIL(&symhead, sym, entry);
	return (0);
}

int
cmdline_symset(char *s)
{
	char	*sym, *val;
	int	ret;
	size_t	len;

	if ((val = strrchr(s, '=')) == NULL)
		return (-1);

	len = strlen(s) - strlen(val) + 1;
	if ((sym = malloc(len)) == NULL)
		errx(1, "cmdline_symset: malloc");

	(void)strlcpy(sym, s, len);

	ret = symset(sym, val + 1, 1);
	free(sym);

	return (ret);
}

char *
symget(const char *nam)
{
	struct sym	*sym;

	TAILQ_FOREACH(sym, &symhead, entry) {
		if (strcmp(nam, sym->nam) == 0) {
			sym->used = 1;
			return (sym->val);
		}
	}
	return (NULL);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parse.y,v 1.23 2017/08/28 06:00:05 florian Exp $ */
2
3			/*
4			* Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org>
5			* Copyright (c) 2007, 2008 Reyk Floeter <reyk@openbsd.org>
6			* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
7			* Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
8			* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
9			* Copyright (c) 2001 Markus Friedl. All rights reserved.
10			* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
11			* Copyright (c) 2001 Theo de Raadt. All rights reserved.
12			*
13			* Permission to use, copy, modify, and distribute this software for any
14			* purpose with or without fee is hereby granted, provided that the above
15			* copyright notice and this permission notice appear in all copies.
16			*
17			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
18			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
19			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
20			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
21			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
22			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
23			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24			*/
25
26			%{
27			#include <sys/types.h>
28			#include <sys/time.h>
29			#include <sys/queue.h>
30			#include <sys/tree.h>
31			#include <sys/socket.h>
32			#include <sys/stat.h>
33
34			#include <netinet/in.h>
35			#include <arpa/inet.h>
36
37			#include <ctype.h>
38			#include <err.h>
39			#include <errno.h>
40			#include <event.h>
41			#include <fcntl.h>
42			#include <limits.h>
43			#include <netdb.h>
44			#include <pwd.h>
45			#include <stdarg.h>
46			#include <stdio.h>
47			#include <stdlib.h>
48			#include <string.h>
49			#include <syslog.h>
50			#include <unistd.h>
51
52			#include "ypldap.h"
53
54			TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
55			static struct file {
56			TAILQ_ENTRY(file) entry;
57			FILE *stream;
58			char *name;
59			int lineno;
60			int errors;
61			} file, topfile;
62			struct file pushfile(const char , int);
63			int popfile(void);
64			int check_file_secrecy(int, const char *);
65			int yyparse(void);
66			int yylex(void);
67			int yyerror(const char *, ...)
68			__attribute__((__format__ (printf, 1, 2)))
69			__attribute__((__nonnull__ (1)));
70			int kw_cmp(const void , const void );
71			int lookup(char *);
72			int lgetc(int);
73			int lungetc(int);
74			int findeol(void);
75
76			TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
77			struct sym {
78			TAILQ_ENTRY(sym) entry;
79			int used;
80			int persist;
81			char *nam;
82			char *val;
83			};
84			int symset(const char , const char , int);
85			char symget(const char );
86
87			struct env *conf = NULL;
88			struct idm *idm = NULL;
89			static int errors = 0;
90
91			typedef struct {
92			union {
93			int64_t number;
94			char *string;
95			} v;
96			int lineno;
97			} YYSTYPE;
98
99			%}
100
101			%token SERVER FILTER ATTRIBUTE BASEDN BINDDN GROUPDN BINDCRED MAPS CHANGE DOMAIN PROVIDE
102			%token USER GROUP TO EXPIRE HOME SHELL GECOS UID GID INTERVAL
103			%token PASSWD NAME FIXED LIST GROUPNAME GROUPPASSWD GROUPGID MAP
104			%token INCLUDE DIRECTORY CLASS PORT ERROR GROUPMEMBERS LDAPS TLS CAFILE
105			%token <v.string> STRING
106			%token <v.number> NUMBER
107			%type <v.number> opcode attribute
108			%type <v.number> port
109			%type <v.number> ssl
110
111			%%
112
113			grammar : /* empty */
114			\| grammar '\n'
115			\| grammar include '\n'
116			\| grammar varset '\n'
117			\| grammar directory '\n'
118			\| grammar main '\n'
119			\| grammar error '\n' { file->errors++; }
120			;
121
122			nl : '\n' optnl
123			;
124
125			optnl : '\n' optnl
126			\| /* empty */
127			;
128
129
130			include : INCLUDE STRING {
131			struct file *nfile;
132
133			if ((nfile = pushfile($2, 0)) == NULL) {
134			yyerror("failed to include file %s", $2);
135			free($2);
136			YYERROR;
137			}
138			free($2);
139
140			file = nfile;
141			lungetc('\n');
142			}
143			;
144
145			varset : STRING '=' STRING {
146			char *s = $1;
147			while (*s++) {
148			if (isspace((unsigned char)*s)) {
149			yyerror("macro name cannot contain "
150			"whitespace");
151			YYERROR;
152			}
153			}
154			if (symset($1, $3, 0) == -1)
155			fatal("cannot store variable");
156			free($1);
157			free($3);
158			}
159			;
160
161			port : PORT STRING {
162			struct servent *servent;
163
164			servent = getservbyname($2, "tcp");
165			if (servent == NULL) {
166			yyerror("port %s is invalid", $2);
167			free($2);
168			YYERROR;
169			}
170			$$ = ntohs(servent->s_port);
171			free($2);
172			}
173			\| PORT NUMBER {
174			if ($2 <= 0 \|\| $2 > (int)USHRT_MAX) {
175			yyerror("invalid port: %lld", $2);
176			YYERROR;
177			}
178			$$ = $2;
179			}
180			\| /* empty */ {
181			$$ = 0;
182			}
183			;
184
185			opcode : GROUP { $$ = 0; }
186			\| PASSWD { $$ = 1; }
187			;
188
189
190			attribute : NAME { $$ = 0; }
191			\| PASSWD { $$ = 1; }
192			\| UID { $$ = 2; }
193			\| GID { $$ = 3; }
194			\| CLASS { $$ = 4; }
195			\| CHANGE { $$ = 5; }
196			\| EXPIRE { $$ = 6; }
197			\| GECOS { $$ = 7; }
198			\| HOME { $$ = 8; }
199			\| SHELL { $$ = 9; }
200			\| GROUPNAME { $$ = 10; }
201			\| GROUPPASSWD { $$ = 11; }
202			\| GROUPGID { $$ = 12; }
203			\| GROUPMEMBERS { $$ = 13; }
204			;
205
206			diropt : BINDDN STRING {
207			idm->idm_flags \|= F_NEEDAUTH;
208			if (strlcpy(idm->idm_binddn, $2,
209			sizeof(idm->idm_binddn)) >=
210			sizeof(idm->idm_binddn)) {
211			yyerror("directory binddn truncated");
212			free($2);
213			YYERROR;
214			}
215			free($2);
216			}
217			\| BINDCRED STRING {
218			idm->idm_flags \|= F_NEEDAUTH;
219			if (strlcpy(idm->idm_bindcred, $2,
220			sizeof(idm->idm_bindcred)) >=
221			sizeof(idm->idm_bindcred)) {
222			yyerror("directory bindcred truncated");
223			free($2);
224			YYERROR;
225			}
226			free($2);
227			}
228			\| BASEDN STRING {
229			if (strlcpy(idm->idm_basedn, $2,
230			sizeof(idm->idm_basedn)) >=
231			sizeof(idm->idm_basedn)) {
232			yyerror("directory basedn truncated");
233			free($2);
234			YYERROR;
235			}
236			free($2);
237			}
238			\| GROUPDN STRING {
239			if(strlcpy(idm->idm_groupdn, $2,
240			sizeof(idm->idm_groupdn)) >=
241			sizeof(idm->idm_groupdn)) {
242			yyerror("directory groupdn truncated");
243			free($2);
244			YYERROR;
245			}
246			free($2);
247			}
248			\| opcode FILTER STRING {
249			if (strlcpy(idm->idm_filters[$1], $3,
250			sizeof(idm->idm_filters[$1])) >=
251			sizeof(idm->idm_filters[$1])) {
252			yyerror("filter truncated");
253			free($3);
254			YYERROR;
255			}
256			free($3);
257			}
258			\| ATTRIBUTE attribute MAPS TO STRING {
259			if (strlcpy(idm->idm_attrs[$2], $5,
260			sizeof(idm->idm_attrs[$2])) >=
261			sizeof(idm->idm_attrs[$2])) {
262			yyerror("attribute truncated");
263			free($5);
264			YYERROR;
265			}
266			free($5);
267			}
268			\| FIXED ATTRIBUTE attribute STRING {
269			if (strlcpy(idm->idm_attrs[$3], $4,
270			sizeof(idm->idm_attrs[$3])) >=
271			sizeof(idm->idm_attrs[$3])) {
272			yyerror("attribute truncated");
273			free($4);
274			YYERROR;
275			}
276			idm->idm_flags \|= F_FIXED_ATTR($3);
277			free($4);
278			}
279			\| LIST attribute MAPS TO STRING {
280			if (strlcpy(idm->idm_attrs[$2], $5,
281			sizeof(idm->idm_attrs[$2])) >=
282			sizeof(idm->idm_attrs[$2])) {
283			yyerror("attribute truncated");
284			free($5);
285			YYERROR;
286			}
287			idm->idm_list \|= F_LIST($2);
288			free($5);
289			}
290			;
291
292			ssl : /* empty */ { $$ = 0; }
293			\| LDAPS { $$ = F_SSL; }
294			\| TLS { $$ = F_STARTTLS; }
295			;
296
297			directory : DIRECTORY STRING port ssl {
298			if ((idm = calloc(1, sizeof(*idm))) == NULL)
299			fatal(NULL);
300			idm->idm_id = conf->sc_maxid++;
301
302			if (strlcpy(idm->idm_name, $2,
303			sizeof(idm->idm_name)) >=
304			sizeof(idm->idm_name)) {
305			yyerror("attribute truncated");
306			free($2);
307			YYERROR;
308			}
309			free($2);
310
311			idm->idm_port = $3;
312
313			if ($4 != 0) {
314			if (tls_init()) {
315			yyerror("tls init failed");
316			YYERROR;
317			}
318
319			idm->idm_flags \|= $4;
320			idm->idm_tls_config = tls_config_new();
321			if (idm->idm_tls_config == NULL) {
322			yyerror("tls config failed");
323			YYERROR;
324			}
325
326			if (tls_config_set_protocols(
327			idm->idm_tls_config,
328			TLS_PROTOCOLS_ALL) == -1) {
329			yyerror("tls set protocols failed: %s",
330			tls_config_error(
331			idm->idm_tls_config));
332			tls_config_free(idm->idm_tls_config);
333			idm->idm_tls_config = NULL;
334			YYERROR;
335			}
336			if (tls_config_set_ciphers(idm->idm_tls_config,
337			"compat") == -1) {
338			yyerror("tls set ciphers failed: %s",
339			tls_config_error(
340			idm->idm_tls_config));
341			tls_config_free(idm->idm_tls_config);
342			idm->idm_tls_config = NULL;
343			YYERROR;
344			}
345
346			if (tls_config_set_ca_file(idm->idm_tls_config,
347			conf->sc_cafile) == -1) {
348			yyerror("tls set CA bundle failed: %s",
349			tls_config_error(
350			idm->idm_tls_config));
351			tls_config_free(idm->idm_tls_config);
352			idm->idm_tls_config = NULL;
353			YYERROR;
354			}
355			}
356
357			} '{' optnl diropts '}' {
358			TAILQ_INSERT_TAIL(&conf->sc_idms, idm, idm_entry);
359			idm = NULL;
360			}
361			;
362
363			main : INTERVAL NUMBER {
364			conf->sc_conf_tv.tv_sec = $2;
365			conf->sc_conf_tv.tv_usec = 0;
366			}
367			\| DOMAIN STRING {
368			if (strlcpy(conf->sc_domainname, $2,
369			sizeof(conf->sc_domainname)) >=
370			sizeof(conf->sc_domainname)) {
371			yyerror("domainname truncated");
372			free($2);
373			YYERROR;
374			}
375			free($2);
376			}
377			\| PROVIDE MAP STRING {
378			if (strcmp($3, "passwd.byname") == 0)
379			conf->sc_flags \|= YPMAP_PASSWD_BYNAME;
380			else if (strcmp($3, "passwd.byuid") == 0)
381			conf->sc_flags \|= YPMAP_PASSWD_BYUID;
382			else if (strcmp($3, "master.passwd.byname") == 0)
383			conf->sc_flags \|= YPMAP_MASTER_PASSWD_BYNAME;
384			else if (strcmp($3, "master.passwd.byuid") == 0)
385			conf->sc_flags \|= YPMAP_MASTER_PASSWD_BYUID;
386			else if (strcmp($3, "group.byname") == 0)
387			conf->sc_flags \|= YPMAP_GROUP_BYNAME;
388			else if (strcmp($3, "group.bygid") == 0)
389			conf->sc_flags \|= YPMAP_GROUP_BYGID;
390			else if (strcmp($3, "netid.byname") == 0)
391			conf->sc_flags \|= YPMAP_NETID_BYNAME;
392			else {
393			yyerror("unsupported map type: %s", $3);
394			free($3);
395			YYERROR;
396			}
397			free($3);
398			}
399			\| CAFILE STRING {
400			free(conf->sc_cafile);
401			conf->sc_cafile = $2;
402			}
403			;
404
405			diropts : diropts diropt nl
406			\| diropt optnl
407			;
408
409			%%
410
411			struct keywords {
412			const char *k_name;
413			int k_val;
414			};
415
416			int
417			yyerror(const char *fmt, ...)
418			{
419			va_list ap;
420			char *msg;
421
422			file->errors++;
423			va_start(ap, fmt);
424			if (vasprintf(&msg, fmt, ap) == -1)
425			fatalx("yyerror vasprintf");
426			va_end(ap);
427			logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
428			free(msg);
429			return (0);
430			}
431
432			int
433			kw_cmp(const void k, const void e)
434			{
435			return (strcmp(k, ((const struct keywords *)e)->k_name));
436			}
437
438			int
439			lookup(char *s)
440			{
441			/* this has to be sorted always */
442			static const struct keywords keywords[] = {
443			{ "attribute", ATTRIBUTE },
444			{ "basedn", BASEDN },
445			{ "bindcred", BINDCRED },
446			{ "binddn", BINDDN },
447			{ "cafile", CAFILE },
448			{ "change", CHANGE },
449			{ "class", CLASS },
450			{ "directory", DIRECTORY },
451			{ "domain", DOMAIN },
452			{ "expire", EXPIRE },
453			{ "filter", FILTER },
454			{ "fixed", FIXED },
455			{ "gecos", GECOS },
456			{ "gid", GID },
457			{ "group", GROUP },
458			{ "groupdn", GROUPDN },
459			{ "groupgid", GROUPGID },
460			{ "groupmembers", GROUPMEMBERS },
461			{ "groupname", GROUPNAME },
462			{ "grouppasswd", GROUPPASSWD },
463			{ "home", HOME },
464			{ "include", INCLUDE },
465			{ "interval", INTERVAL },
466			{ "ldaps", LDAPS },
467			{ "list", LIST },
468			{ "map", MAP },
469			{ "maps", MAPS },
470			{ "name", NAME },
471			{ "passwd", PASSWD },
472			{ "port", PORT },
473			{ "provide", PROVIDE },
474			{ "server", SERVER },
475			{ "shell", SHELL },
476			{ "tls", TLS },
477			{ "to", TO },
478			{ "uid", UID },
479			{ "user", USER },
480			};
481			const struct keywords *p;
482
483			p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
484			sizeof(keywords[0]), kw_cmp);
485
486			if (p)
487			return (p->k_val);
488			else
489			return (STRING);
490			}
491
492			#define MAXPUSHBACK 128
493
494			u_char *parsebuf;
495			int parseindex;
496			u_char pushback_buffer[MAXPUSHBACK];
497			int pushback_index = 0;
498
499			int
500			lgetc(int quotec)
501			{
502			int c, next;
503
504			if (parsebuf) {
505			/* Read character from the parsebuffer instead of input. */
506			if (parseindex >= 0) {
507			c = parsebuf[parseindex++];
508			if (c != '\0')
509			return (c);
510			parsebuf = NULL;
511			} else
512			parseindex++;
513			}
514
515			if (pushback_index)
516			return (pushback_buffer[--pushback_index]);
517
518			if (quotec) {
519			if ((c = getc(file->stream)) == EOF) {
520			yyerror("reached end of file while parsing "
521			"quoted string");
522			if (file == topfile \|\| popfile() == EOF)
523			return (EOF);
524			return (quotec);
525			}
526			return (c);
527			}
528
529			while ((c = getc(file->stream)) == '\\') {
530			next = getc(file->stream);
531			if (next != '\n') {
532			c = next;
533			break;
534			}
535			yylval.lineno = file->lineno;
536			file->lineno++;
537			}
538
539			while (c == EOF) {
540			if (file == topfile \|\| popfile() == EOF)
541			return (EOF);
542			c = getc(file->stream);
543			}
544			return (c);
545			}
546
547			int
548			lungetc(int c)
549			{
550			if (c == EOF)
551			return (EOF);
552			if (parsebuf) {
553			parseindex--;
554			if (parseindex >= 0)
555			return (c);
556			}
557			if (pushback_index < MAXPUSHBACK-1)
558			return (pushback_buffer[pushback_index++] = c);
559			else
560			return (EOF);
561			}
562
563			int
564			findeol(void)
565			{
566			int c;
567
568			parsebuf = NULL;
569
570			/* skip to either EOF or the first real EOL */
571			while (1) {
572			if (pushback_index)
573			c = pushback_buffer[--pushback_index];
574			else
575			c = lgetc(0);
576			if (c == '\n') {
577			file->lineno++;
578			break;
579			}
580			if (c == EOF)
581			break;
582			}
583			return (ERROR);
584			}
585
586			int
587			yylex(void)
588			{
589			u_char buf[8096];
590			u_char p, val;
591			int quotec, next, c;
592			int token;
593
594			top:
595			p = buf;
596			while ((c = lgetc(0)) == ' ' \|\| c == '\t')
597			; /* nothing */
598
599			yylval.lineno = file->lineno;
600			if (c == '#')
601			while ((c = lgetc(0)) != '\n' && c != EOF)
602			; /* nothing */
603			if (c == '$' && parsebuf == NULL) {
604			while (1) {
605			if ((c = lgetc(0)) == EOF)
606			return (0);
607
608			if (p + 1 >= buf + sizeof(buf) - 1) {
609			yyerror("string too long");
610			return (findeol());
611			}
612			if (isalnum(c) \|\| c == '_') {
613			*p++ = c;
614			continue;
615			}
616			*p = '\0';
617			lungetc(c);
618			break;
619			}
620			val = symget(buf);
621			if (val == NULL) {
622			yyerror("macro '%s' not defined", buf);
623			return (findeol());
624			}
625			parsebuf = val;
626			parseindex = 0;
627			goto top;
628			}
629
630			switch (c) {
631			case '\'':
632			case '"':
633			quotec = c;
634			while (1) {
635			if ((c = lgetc(quotec)) == EOF)
636			return (0);
637			if (c == '\n') {
638			file->lineno++;
639			continue;
640			} else if (c == '\\') {
641			if ((next = lgetc(quotec)) == EOF)
642			return (0);
643			if (next == quotec \|\| c == ' ' \|\| c == '\t')
644			c = next;
645			else if (next == '\n') {
646			file->lineno++;
647			continue;
648			} else
649			lungetc(next);
650			} else if (c == quotec) {
651			*p = '\0';
652			break;
653			} else if (c == '\0') {
654			yyerror("syntax error");
655			return (findeol());
656			}
657			if (p + 1 >= buf + sizeof(buf) - 1) {
658			yyerror("string too long");
659			return (findeol());
660			}
661			*p++ = c;
662			}
663			yylval.v.string = strdup(buf);
664			if (yylval.v.string == NULL)
665			err(1, "yylex: strdup");
666			return (STRING);
667			}
668
669			#define allowed_to_end_number(x) \
670			(isspace(x) \|\| x == ')' \|\| x ==',' \|\| x == '/' \|\| x == '}' \|\| x == '=')
671
672			if (c == '-' \|\| isdigit(c)) {
673			do {
674			*p++ = c;
675			if ((unsigned)(p-buf) >= sizeof(buf)) {
676			yyerror("string too long");
677			return (findeol());
678			}
679			} while ((c = lgetc(0)) != EOF && isdigit(c));
680			lungetc(c);
681			if (p == buf + 1 && buf[0] == '-')
682			goto nodigits;
683			if (c == EOF \|\| allowed_to_end_number(c)) {
684			const char *errstr = NULL;
685
686			*p = '\0';
687			yylval.v.number = strtonum(buf, LLONG_MIN,
688			LLONG_MAX, &errstr);
689			if (errstr) {
690			yyerror("\"%s\" invalid number: %s",
691			buf, errstr);
692			return (findeol());
693			}
694			return (NUMBER);
695			} else {
696			nodigits:
697			while (p > buf + 1)
698			lungetc(*--p);
699			c = *--p;
700			if (c == '-')
701			return (c);
702			}
703			}
704
705			#define allowed_in_string(x) \
706			(isalnum(x) \|\| (ispunct(x) && x != '(' && x != ')' && \
707			x != '{' && x != '}' && x != '<' && x != '>' && \
708			x != '!' && x != '=' && x != '#' && \
709			x != ','))
710
711			if (isalnum(c) \|\| c == ':' \|\| c == '_') {
712			do {
713			*p++ = c;
714			if ((unsigned)(p-buf) >= sizeof(buf)) {
715			yyerror("string too long");
716			return (findeol());
717			}
718			} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
719			lungetc(c);
720			*p = '\0';
721			if ((token = lookup(buf)) == STRING)
722			if ((yylval.v.string = strdup(buf)) == NULL)
723			err(1, "yylex: strdup");
724			return (token);
725			}
726			if (c == '\n') {
727			yylval.lineno = file->lineno;
728			file->lineno++;
729			}
730			if (c == EOF)
731			return (0);
732			return (c);
733			}
734
735			int
736			check_file_secrecy(int fd, const char *fname)
737			{
738			struct stat st;
739
740			if (fstat(fd, &st)) {
741			log_warn("cannot stat %s", fname);
742			return (-1);
743			}
744			if (st.st_uid != 0 && st.st_uid != getuid()) {
745			log_warnx("%s: owner not root or current user", fname);
746			return (-1);
747			}
748			if (st.st_mode & (S_IWGRP \| S_IXGRP \| S_IRWXO)) {
749			log_warnx("%s: group writable or world read/writable", fname);
750			return (-1);
751			}
752			return (0);
753			}
754
755			struct file *
756			pushfile(const char *name, int secret)
757			{
758			struct file *nfile;
759
760			if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
761			log_warn("malloc");
762			return (NULL);
763			}
764			if ((nfile->name = strdup(name)) == NULL) {
765			log_warn("malloc");
766			free(nfile);
767			return (NULL);
768			}
769			if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
770			log_warn("%s", nfile->name);
771			free(nfile->name);
772			free(nfile);
773			return (NULL);
774			} else if (secret &&
775			check_file_secrecy(fileno(nfile->stream), nfile->name)) {
776			fclose(nfile->stream);
777			free(nfile->name);
778			free(nfile);
779			return (NULL);
780			}
781			nfile->lineno = 1;
782			TAILQ_INSERT_TAIL(&files, nfile, entry);
783			return (nfile);
784			}
785
786			int
787			popfile(void)
788			{
789			struct file *prev;
790
791			if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
792			prev->errors += file->errors;
793
794			TAILQ_REMOVE(&files, file, entry);
795			fclose(file->stream);
796			free(file->name);
797			free(file);
798			file = prev;
799			return (file ? 0 : EOF);
800			}
801
802			int
803			parse_config(struct env x_conf, const char filename, int opts)
804			{
805			struct sym sym, next;
806
807			conf = x_conf;
808			bzero(conf, sizeof(*conf));
809
810			TAILQ_INIT(&conf->sc_idms);
811			conf->sc_conf_tv.tv_sec = DEFAULT_INTERVAL;
812			conf->sc_conf_tv.tv_usec = 0;
813			conf->sc_cafile = strdup(YPLDAP_CERT_FILE);
814			if (conf->sc_cafile == NULL) {
815			log_warn("malloc");
816			return (-1);
817			}
818
819			errors = 0;
820
821			if ((file = pushfile(filename, 1)) == NULL) {
822			return (-1);
823			}
824			topfile = file;
825
826			/*
827			* parse configuration
828			*/
829			setservent(1);
830			yyparse();
831			endservent();
832			errors = file->errors;
833			popfile();
834
835			/* Free macros and check which have not been used. */
836			TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
837			if ((opts & YPLDAP_OPT_VERBOSE) && !sym->used)
838			fprintf(stderr, "warning: macro '%s' not "
839			"used\n", sym->nam);
840			if (!sym->persist) {
841			free(sym->nam);
842			free(sym->val);
843			TAILQ_REMOVE(&symhead, sym, entry);
844			free(sym);
845			}
846			}
847
848			if (errors) {
849			return (-1);
850			}
851
852			return (0);
853			}
854
855			int
856			symset(const char nam, const char val, int persist)
857			{
858			struct sym *sym;
859
860			TAILQ_FOREACH(sym, &symhead, entry) {
861			if (strcmp(nam, sym->nam) == 0)
862			break;
863			}
864
865			if (sym != NULL) {
866			if (sym->persist == 1)
867			return (0);
868			else {
869			free(sym->nam);
870			free(sym->val);
871			TAILQ_REMOVE(&symhead, sym, entry);
872			free(sym);
873			}
874			}
875			if ((sym = calloc(1, sizeof(*sym))) == NULL)
876			return (-1);
877
878			sym->nam = strdup(nam);
879			if (sym->nam == NULL) {
880			free(sym);
881			return (-1);
882			}
883			sym->val = strdup(val);
884			if (sym->val == NULL) {
885			free(sym->nam);
886			free(sym);
887			return (-1);
888			}
889			sym->used = 0;
890			sym->persist = persist;
891			TAILQ_INSERT_TAIL(&symhead, sym, entry);
892			return (0);
893			}
894
895			int
896			cmdline_symset(char *s)
897			{
898			char sym, val;
899			int ret;
900			size_t len;
901
902			if ((val = strrchr(s, '=')) == NULL)
903			return (-1);
904
905			len = strlen(s) - strlen(val) + 1;
906			if ((sym = malloc(len)) == NULL)
907			errx(1, "cmdline_symset: malloc");
908
909			(void)strlcpy(sym, s, len);
910
911			ret = symset(sym, val + 1, 1);
912			free(sym);
913
914			return (ret);
915			}
916
917			char *
918			symget(const char *nam)
919			{
920			struct sym *sym;
921
922			TAILQ_FOREACH(sym, &symhead, entry) {
923			if (strcmp(nam, sym->nam) == 0) {
924			sym->used = 1;
925			return (sym->val);
926			}
927			}
928			return (NULL);
929			}