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cfgfile_parser.y
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/*
* csync2 - cluster synchronization tool, 2nd generation
* Copyright (C) 2004 - 2015 LINBIT Information Technologies GmbH
* http://www.linbit.com; see also AUTHORS
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
%{
#include "csync2.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fnmatch.h>
#include <ctype.h>
struct csync_group *csync_group = 0;
struct csync_prefix *csync_prefix = 0;
struct csync_nossl *csync_nossl = 0;
int csync_ignore_uid = 0;
int csync_ignore_gid = 0;
int csync_ignore_mod = 0;
unsigned csync_lock_timeout = 12;
char *csync_tempdir = NULL;
#ifdef __CYGWIN__
int csync_lowercyg_disable = 0;
int csync_lowercyg_used = 0;
#endif
extern void yyerror(char* text);
extern int yylex();
extern int yylineno;
void yyerror(char *text)
{
csync_fatal("Near line %d: %s\n", yylineno, text);
}
static void new_group(char *name)
{
int static autonum = 1;
int rc;
struct csync_group *t =
calloc(sizeof(struct csync_group), 1);
if (name == 0)
rc = asprintf(&name, "group_%d", autonum++);
t->next = csync_group;
t->auto_method = -1;
t->gname = name;
t->backup_generations = 3;
csync_group = t;
}
static void add_host(char *hostname, char *peername, int slave)
{
int i;
for (i=0; hostname[i]; i++)
hostname[i] = tolower(hostname[i]);
for (i=0; peername[i]; i++)
peername[i] = tolower(peername[i]);
if ( strcmp(hostname, myhostname) == 0 ) {
csync_group->local_slave = slave;
csync_group->myname = peername;
free(hostname);
} else {
struct csync_group_host *t =
calloc(sizeof(struct csync_group_host), 1);
t->hostname = peername;
t->on_left_side = !csync_group->myname;
t->slave = slave;
t->next = csync_group->host;
csync_group->host = t;
free(hostname);
}
}
static void add_patt(int patterntype, char *pattern)
{
struct csync_group_pattern *t =
calloc(sizeof(struct csync_group_pattern), 1);
int i;
#if __CYGWIN__
if (isalpha(pattern[0]) && pattern[1] == ':' &&
(pattern[2] == '/' || pattern[2] == '\\')) {
char *new_pattern, *p;
asprintf(&new_pattern, "/cygdrive/%c/%s",
tolower(pattern[0]), pattern+3);
for (p = new_pattern; *p; p++)
if (*p == '\\') *p = '/';
free(pattern);
pattern = new_pattern;
}
#endif
/* strip trailing slashes from pattern */
for (i=strlen(pattern)-1; i>0; i--)
if (pattern[i] == '/')
pattern[i] = 0;
else
break;
/* if you use ** at least once anywhere in the pattern,
* _all_ stars in the pattern, even single ones,
* will match slashes. */
t->star_matches_slashes = !!strstr(pattern, "**");
t->isinclude = patterntype >= 1;
t->iscompare = patterntype >= 2;
t->pattern = pattern;
t->next = csync_group->pattern;
csync_group->pattern = t;
}
static void set_key(char *keyfilename)
{
FILE *keyfile;
char *fname = keyfilename;
char line[1024];
int i;
if ( csync_group->key )
csync_fatal("Config error: a group might only have one key.\n");
if (fname && fname[0] && fname[0] != '/')
ASPRINTF(&fname, "%s/%s", systemdir, keyfilename);
if ( (keyfile = fopen(fname, "r")) == 0 ||
fgets(line, 1024, keyfile) == 0 )
csync_fatal("Config error: Can't read keyfile %s.\n", fname);
for (i=0; line[i]; i++) {
if (line[i] == '\n') { line[i]=0; break; }
if ( !(line[i] >= 'A' && line[i] <= 'Z') &&
!(line[i] >= 'a' && line[i] <= 'z') &&
!(line[i] >= '0' && line[i] <= '9') &&
line[i] != '.' && line[i] != '_' )
csync_fatal("Unallowed character '%c' in key file %s.\n",
line[i], fname);
}
if ( strlen(line) < 32 )
csync_fatal("Config error: Key in file %s is too short.\n", fname);
csync_group->key = strdup(line);
if (fname != keyfilename)
free(fname);
free(keyfilename);
fclose(keyfile);
}
static void set_auto(char *auto_method)
{
int method_id = -1;
if (csync_group->auto_method >= 0)
csync_fatal("Config error: a group might only have one auto-setting.\n");
if (!strcmp(auto_method, "none"))
method_id = CSYNC_AUTO_METHOD_NONE;
if (!strcmp(auto_method, "first"))
method_id = CSYNC_AUTO_METHOD_FIRST;
if (!strcmp(auto_method, "younger"))
method_id = CSYNC_AUTO_METHOD_YOUNGER;
if (!strcmp(auto_method, "older"))
method_id = CSYNC_AUTO_METHOD_OLDER;
if (!strcmp(auto_method, "bigger"))
method_id = CSYNC_AUTO_METHOD_BIGGER;
if (!strcmp(auto_method, "smaller"))
method_id = CSYNC_AUTO_METHOD_SMALLER;
if (!strcmp(auto_method, "left"))
method_id = CSYNC_AUTO_METHOD_LEFT;
if (!strcmp(auto_method, "right"))
method_id = CSYNC_AUTO_METHOD_RIGHT;
if (method_id < 0)
csync_fatal("Config error: Unknown auto-setting '%s' (use "
"'none', 'younger', 'older', 'bigger', 'smaller', "
"'left' or 'right').\n", auto_method);
csync_group->auto_method = method_id;
free(auto_method);
}
static void set_bak_dir(char *dir)
{
csync_group->backup_directory = dir;
}
static void set_bak_gen(char *gen)
{
csync_group->backup_generations = atoi(gen);
free(gen);
}
static void check_group()
{
if ( ! csync_group->key )
csync_fatal("Config error: every group must have a key.\n");
if ( csync_group->auto_method < 0 )
csync_group->auto_method = CSYNC_AUTO_METHOD_NONE;
/* re-order hosts and pattern */
{
struct csync_group_host *t = csync_group->host;
csync_group->host = 0;
while ( t ) {
struct csync_group_host *next = t->next;
t->next = csync_group->host;
csync_group->host = t;
t = next;
}
}
{
struct csync_group_pattern *t = csync_group->pattern;
csync_group->pattern = 0;
while ( t ) {
struct csync_group_pattern *next = t->next;
t->next = csync_group->pattern;
csync_group->pattern = t;
t = next;
}
}
if (active_peerlist) {
struct csync_group_host *h;
int i=0, thisplen;
while (active_peerlist[i]) {
thisplen = strcspn(active_peerlist + i, ",");
for (h=csync_group->host; h; h=h->next)
if (strlen(h->hostname) == thisplen && !strncmp(active_peerlist + i, h->hostname, thisplen))
goto foundactivepeers;
i += thisplen;
while (active_peerlist[i] == ',') i++;
}
} else
foundactivepeers:
csync_group->hasactivepeers = 1;
if (active_grouplist && csync_group->myname)
{
int i=0, gnamelen = strlen(csync_group->gname);
while (active_grouplist[i])
{
if ( !strncmp(active_grouplist+i, csync_group->gname, gnamelen) &&
(active_grouplist[i+gnamelen] == ',' || !active_grouplist[i+gnamelen]) )
goto found_asactive;
while (active_grouplist[i])
if (active_grouplist[i++]==',') break;
}
csync_group->myname = 0;
found_asactive: ;
}
}
static void new_action()
{
struct csync_group_action *t =
calloc(sizeof(struct csync_group_action), 1);
t->next = csync_group->action;
t->logfile = "/dev/null";
csync_group->action = t;
}
static void add_action_pattern(const char *pattern)
{
struct csync_group_action_pattern *t =
calloc(sizeof(struct csync_group_action_pattern), 1);
t->star_matches_slashes = !!strstr(pattern, "**");
t->pattern = pattern;
t->next = csync_group->action->pattern;
csync_group->action->pattern = t;
}
static void add_action_exec(const char *command)
{
struct csync_group_action_command *t =
calloc(sizeof(struct csync_group_action_command), 1);
t->command = command;
t->next = csync_group->action->command;
csync_group->action->command = t;
}
static void set_action_logfile(const char *logfile)
{
csync_group->action->logfile = logfile;
}
static void set_action_dolocal()
{
csync_group->action->do_local = 1;
}
static void set_action_dolocal_only()
{
csync_group->action->do_local = 1;
csync_group->action->do_local_only = 1;
}
static void set_lock_timeout(const char *timeout)
{
csync_lock_timeout = atoi(timeout);
}
static void set_tempdir(const char *tempdir)
{
csync_tempdir = strdup(tempdir);
}
static void set_database(const char *filename)
{
if (!csync_database)
csync_database = strdup(filename);
}
static void new_prefix(const char *pname)
{
struct csync_prefix *p =
calloc(sizeof(struct csync_prefix), 1);
p->name = pname;
p->next = csync_prefix;
csync_prefix = p;
}
static void new_prefix_entry(char *pattern, char *path)
{
int i;
if (path[0] != '/')
csync_fatal("Config error: Prefix '%s' is not an absolute path.\n", path);
if (!csync_prefix->path && !fnmatch(pattern, myhostname, 0)) {
#if __CYGWIN__
if (isalpha(path[0]) && path[1] == ':' &&
(path[2] == '/' || path[2] == '\\')) {
char *new_path, *p;
asprintf(&new_path, "/cygdrive/%c/%s",
tolower(path[0]), path+3);
for (p = new_path; *p; p++)
if (*p == '\\') *p = '/';
free(path);
path = new_path;
}
#endif
for (i=strlen(path)-1; i>0; i--)
if (path[i] == '/')
path[i] = 0;
else
break;
csync_debug(2, "Prefix '%s' is set to '%s'.\n", csync_prefix->name, path);
csync_prefix->path = path;
} else
free(path);
free(pattern);
}
static void new_nossl(const char *from, const char *to)
{
struct csync_nossl *t =
calloc(sizeof(struct csync_nossl), 1);
t->pattern_from = from;
t->pattern_to = to;
t->next = csync_nossl;
csync_nossl = t;
}
static void new_ignore(char *propname)
{
if ( !strcmp(propname, "uid") )
csync_ignore_uid = 1;
else
if ( !strcmp(propname, "gid") )
csync_ignore_gid = 1;
else
if ( !strcmp(propname, "mod") )
csync_ignore_mod = 1;
else
csync_fatal("Config error: Unknown 'ignore' porperty: '%s'.\n", propname);
free(propname);
}
static void disable_cygwin_lowercase_hack()
{
#ifdef __CYGWIN__
if (csync_lowercyg_used)
csync_fatal("Config error: 'nocygwinlowercase' must be at the top of the config file.\n");
csync_lowercyg_disable = 1;
#else
csync_fatal("Config error: Found 'nocygwinlowercase' but this is not a cygwin csync2.\n");
#endif
}
%}
%expect 2
%union {
char *txt;
}
%token TK_BLOCK_BEGIN TK_BLOCK_END TK_STEND TK_AT TK_AUTO
%token TK_NOSSL TK_IGNORE TK_GROUP TK_HOST TK_EXCL TK_INCL TK_COMP TK_KEY TK_DATABASE
%token TK_ACTION TK_PATTERN TK_EXEC TK_DOLOCAL TK_LOGFILE TK_NOCYGLOWER
%token TK_PREFIX TK_ON TK_COLON TK_POPEN TK_PCLOSE
%token TK_BAK_DIR TK_BAK_GEN TK_DOLOCALONLY
%token TK_TEMPDIR
%token TK_LOCK_TIMEOUT
%token <txt> TK_STRING
%%
config:
/* empty */
| block config
;
block:
block_header block_body
| TK_PREFIX TK_STRING
{ new_prefix($2); }
TK_BLOCK_BEGIN prefix_list TK_BLOCK_END
{ }
| TK_NOSSL TK_STRING TK_STRING TK_STEND
{ new_nossl($2, $3); }
| TK_DATABASE TK_STRING TK_STEND
{ set_database($2); }
| TK_TEMPDIR TK_STRING TK_STEND
{ set_tempdir($2); }
| TK_IGNORE ignore_list TK_STEND
| TK_NOCYGLOWER TK_STEND
{ disable_cygwin_lowercase_hack(); }
| TK_LOCK_TIMEOUT TK_STRING TK_STEND
{ set_lock_timeout($2); }
;
ignore_list:
/* empty */
| TK_STRING ignore_list
{ new_ignore($1); }
;
prefix_list:
/* empty */
| prefix_list TK_ON TK_STRING TK_COLON TK_STRING TK_STEND
{ new_prefix_entry($3, on_cygwin_lowercase($5)); }
;
block_header:
TK_GROUP
{ new_group(0); }
| TK_GROUP TK_STRING
{ new_group($2); }
;
block_body:
TK_BLOCK_BEGIN stmts TK_BLOCK_END
{ check_group(); }
;
stmts:
/* empty */
| stmt TK_STEND stmts
| action stmts
;
stmt:
TK_HOST host_list
| TK_EXCL excl_list
| TK_INCL incl_list
| TK_COMP comp_list
| TK_KEY TK_STRING
{ set_key($2); }
| TK_AUTO TK_STRING
{ set_auto($2); }
| TK_BAK_DIR TK_STRING
{ set_bak_dir($2); }
| TK_BAK_GEN TK_STRING
{ set_bak_gen($2); }
;
host_list:
/* empty */
| host_list TK_STRING
{ add_host($2, strdup($2), 0); }
| host_list TK_STRING TK_AT TK_STRING
{ add_host($2, $4, 0); }
| host_list TK_POPEN host_list_slaves TK_PCLOSE host_list
;
host_list_slaves:
/* empty */
| host_list_slaves TK_STRING
{ add_host($2, strdup($2), 1); }
| host_list_slaves TK_STRING TK_AT TK_STRING
{ add_host($2, $4, 1); }
;
excl_list:
/* empty */
| excl_list TK_STRING
{ add_patt(0, on_cygwin_lowercase($2)); }
;
incl_list:
/* empty */
| incl_list TK_STRING
{ add_patt(1, on_cygwin_lowercase($2)); }
;
comp_list:
/* empty */
| incl_list TK_STRING
{ add_patt(2, on_cygwin_lowercase($2)); }
;
action:
TK_ACTION
{ new_action(); }
TK_BLOCK_BEGIN action_stmts TK_BLOCK_END
;
action_stmts:
/* empty */
| action_stmt TK_STEND action_stmts
;
action_stmt:
TK_PATTERN action_pattern_list
| TK_EXEC action_exec_list
| TK_LOGFILE TK_STRING
{ set_action_logfile($2); }
| TK_DOLOCAL
{ set_action_dolocal(); }
| TK_DOLOCALONLY
{ set_action_dolocal_only(); }
;
action_pattern_list:
/* empty */
| action_pattern_list TK_STRING
{ add_action_pattern(on_cygwin_lowercase($2)); }
;
action_exec_list:
/* empty */
| action_exec_list TK_STRING
{ add_action_exec($2); }
;