File: [local] / src / usr.bin / rdist / gram.y (download)
Revision 1.12, Tue Jan 20 09:00:16 2015 UTC (9 years, 4 months ago) by guenther
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1, OPENBSD_6_0_BASE, OPENBSD_6_0, OPENBSD_5_9_BASE, OPENBSD_5_9, OPENBSD_5_8_BASE, OPENBSD_5_8, OPENBSD_5_7_BASE, OPENBSD_5_7, HEAD
Changes since 1.11: +7 -7 lines
Split out from rdist/defs.h the client-only and server-only bits into
rdist/client.h and rdistd/server.h
Only put #includes in .h files that are necessary for the .h to be used;
all other #includes go in the .c files
Move all extern variable declarations to the .h files, renaming local
variables to avoid shadowing
Replace me_type member of mntent_t with an "is NFS?" flag bit
|
%{
/* $OpenBSD: gram.y,v 1.12 2015/01/20 09:00:16 guenther Exp $ */
/*
* Copyright (c) 1993 Michael A. Cooper
* Copyright (c) 1993 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "client.h"
static struct namelist *addnl(struct namelist *, struct namelist *);
static struct namelist *subnl(struct namelist *, struct namelist *);
static struct namelist *andnl(struct namelist *, struct namelist *);
static int innl(struct namelist *nl, char *p);
struct cmd *cmds = NULL;
struct cmd *last_cmd;
struct namelist *last_n;
struct subcmd *last_sc;
int parendepth = 0;
%}
%term ARROW 1
%term COLON 2
%term DCOLON 3
%term NAME 4
%term STRING 5
%term INSTALL 6
%term NOTIFY 7
%term EXCEPT 8
%term PATTERN 9
%term SPECIAL 10
%term CMDSPECIAL 11
%term OPTION 12
%union {
opt_t optval;
char *string;
struct subcmd *subcmd;
struct namelist *namel;
}
%type <optval> OPTION, options
%type <string> NAME, STRING
%type <subcmd> INSTALL, NOTIFY, EXCEPT, PATTERN, SPECIAL, CMDSPECIAL, cmdlist, cmd
%type <namel> namelist, names, opt_namelist nlist
%%
file: /* VOID */
| file command
;
command: NAME '=' namelist = {
(void) lookup($1, INSERT, $3);
}
| namelist ARROW namelist cmdlist = {
insert((char *)NULL, $1, $3, $4);
}
| NAME COLON namelist ARROW namelist cmdlist = {
insert($1, $3, $5, $6);
}
| namelist DCOLON NAME cmdlist = {
append((char *)NULL, $1, $3, $4);
}
| NAME COLON namelist DCOLON NAME cmdlist = {
append($1, $3, $5, $6);
}
| error
;
namelist: nlist {
$$ = $1;
}
| nlist '-' nlist {
$$ = subnl($1, $3);
}
| nlist '+' nlist {
$$ = addnl($1, $3);
}
| nlist '&' nlist {
$$ = andnl($1, $3);
}
;
nlist: NAME = {
$$ = makenl($1);
}
| '(' names ')' = {
$$ = $2;
}
;
names: /* VOID */ {
$$ = last_n = NULL;
}
| names NAME = {
if (last_n == NULL)
$$ = last_n = makenl($2);
else {
last_n->n_next = makenl($2);
last_n = last_n->n_next;
$$ = $1;
}
}
;
cmdlist: /* VOID */ {
$$ = last_sc = NULL;
}
| cmdlist cmd = {
if (last_sc == NULL)
$$ = last_sc = $2;
else {
last_sc->sc_next = $2;
last_sc = $2;
$$ = $1;
}
}
;
cmd: INSTALL options opt_namelist ';' = {
struct namelist *nl;
$1->sc_options = $2 | options;
if ($3 != NULL) {
nl = expand($3, E_VARS);
if (nl) {
if (nl->n_next != NULL)
yyerror("only one name allowed\n");
$1->sc_name = nl->n_name;
free(nl);
} else
$1->sc_name = NULL;
}
$$ = $1;
}
| NOTIFY namelist ';' = {
if ($2 != NULL)
$1->sc_args = expand($2, E_VARS);
$$ = $1;
}
| EXCEPT namelist ';' = {
if ($2 != NULL)
$1->sc_args = expand($2, E_ALL);
$$ = $1;
}
| PATTERN namelist ';' = {
struct namelist *nl;
char ebuf[BUFSIZ];
regex_t reg;
int ecode;
for (nl = $2; nl != NULL; nl = nl->n_next) {
/* check for a valid regex */
ecode = regcomp(®, nl->n_name, REG_NOSUB);
if (ecode) {
regerror(ecode, ®, ebuf,
sizeof(ebuf));
yyerror(ebuf);
}
regfree(®);
}
$1->sc_args = expand($2, E_VARS);
$$ = $1;
}
| SPECIAL opt_namelist STRING ';' = {
if ($2 != NULL)
$1->sc_args = expand($2, E_ALL);
$1->sc_name = $3;
$$ = $1;
}
| CMDSPECIAL opt_namelist STRING ';' = {
if ($2 != NULL)
$1->sc_args = expand($2, E_ALL);
$1->sc_name = $3;
$$ = $1;
}
;
options: /* VOID */ = {
$$ = 0;
}
| options OPTION = {
$$ |= $2;
}
;
opt_namelist: /* VOID */ = {
$$ = NULL;
}
| namelist = {
$$ = $1;
}
;
%%
int yylineno = 1;
extern FILE *fin;
int
yylex(void)
{
static char yytext[INMAX];
int c;
char *cp1, *cp2;
static char quotechars[] = "[]{}*?$";
again:
switch (c = getc(fin)) {
case EOF: /* end of file */
return(0);
case '#': /* start of comment */
while ((c = getc(fin)) != EOF && c != '\n')
;
if (c == EOF)
return(0);
case '\n':
yylineno++;
case ' ':
case '\t': /* skip blanks */
goto again;
case '=': /* EQUAL */
case ';': /* SM */
case '+':
case '&':
return(c);
case '(': /* LP */
++parendepth;
return(c);
case ')': /* RP */
--parendepth;
return(c);
case '-': /* -> */
if ((c = getc(fin)) == '>')
return(ARROW);
(void) ungetc(c, fin);
c = '-';
break;
case '"': /* STRING */
cp1 = yytext;
cp2 = &yytext[INMAX - 1];
for (;;) {
if (cp1 >= cp2) {
yyerror("command string too long\n");
break;
}
c = getc(fin);
if (c == EOF || c == '"')
break;
if (c == '\\') {
if ((c = getc(fin)) == EOF) {
*cp1++ = '\\';
break;
}
}
if (c == '\n') {
yylineno++;
c = ' '; /* can't send '\n' */
}
*cp1++ = c;
}
if (c != '"')
yyerror("missing closing '\"'\n");
*cp1 = '\0';
yylval.string = xstrdup(yytext);
return(STRING);
case ':': /* : or :: */
if ((c = getc(fin)) == ':')
return(DCOLON);
(void) ungetc(c, fin);
return(COLON);
}
cp1 = yytext;
cp2 = &yytext[INMAX - 1];
for (;;) {
if (cp1 >= cp2) {
yyerror("input line too long\n");
break;
}
if (c == '\\') {
if ((c = getc(fin)) != EOF) {
if (any(c, quotechars))
*cp1++ = QUOTECHAR;
} else {
*cp1++ = '\\';
break;
}
}
*cp1++ = c;
c = getc(fin);
if (c == EOF || any(c, " \"'\t()=;:\n")) {
(void) ungetc(c, fin);
break;
}
}
*cp1 = '\0';
if (yytext[0] == '-' && yytext[1] == CNULL)
return '-';
if (yytext[0] == '-' && parendepth <= 0) {
opt_t opt = 0;
static char ebuf[BUFSIZ];
switch (yytext[1]) {
case 'o':
if (parsedistopts(&yytext[2], &opt, TRUE)) {
(void) snprintf(ebuf, sizeof(ebuf),
"Bad distfile options \"%s\".",
&yytext[2]);
yyerror(ebuf);
}
break;
/*
* These options are obsoleted by -o.
*/
case 'b': opt = DO_COMPARE; break;
case 'R': opt = DO_REMOVE; break;
case 'v': opt = DO_VERIFY; break;
case 'w': opt = DO_WHOLE; break;
case 'y': opt = DO_YOUNGER; break;
case 'h': opt = DO_FOLLOW; break;
case 'i': opt = DO_IGNLNKS; break;
case 'q': opt = DO_QUIET; break;
case 'x': opt = DO_NOEXEC; break;
case 'N': opt = DO_CHKNFS; break;
case 'O': opt = DO_CHKREADONLY; break;
case 's': opt = DO_SAVETARGETS; break;
case 'r': opt = DO_NODESCEND; break;
default:
(void) snprintf(ebuf, sizeof(ebuf),
"Unknown option \"%s\".", yytext);
yyerror(ebuf);
}
yylval.optval = opt;
return(OPTION);
}
if (!strcmp(yytext, "install"))
c = INSTALL;
else if (!strcmp(yytext, "notify"))
c = NOTIFY;
else if (!strcmp(yytext, "except"))
c = EXCEPT;
else if (!strcmp(yytext, "except_pat"))
c = PATTERN;
else if (!strcmp(yytext, "special"))
c = SPECIAL;
else if (!strcmp(yytext, "cmdspecial"))
c = CMDSPECIAL;
else {
yylval.string = xstrdup(yytext);
return(NAME);
}
yylval.subcmd = makesubcmd(c);
return(c);
}
/*
* XXX We should use strchr(), but most versions can't handle
* some of the characters we use.
*/
int any(int c, char *str)
{
while (*str)
if (c == *str++)
return(1);
return(0);
}
/*
* Insert or append ARROW command to list of hosts to be updated.
*/
void
insert(char *label, struct namelist *files, struct namelist *hosts,
struct subcmd *scmds)
{
struct cmd *c, *prev, *nc;
struct namelist *h, *lasth;
debugmsg(DM_CALL, "insert(%s, %p, %p, %p) start, files = %s",
label == NULL ? "(null)" : label,
files, hosts, scmds, getnlstr(files));
files = expand(files, E_VARS|E_SHELL);
hosts = expand(hosts, E_ALL);
for (h = hosts; h != NULL; lasth = h, h = h->n_next,
free((char *)lasth)) {
/*
* Search command list for an update to the same host.
*/
for (prev = NULL, c = cmds; c!=NULL; prev = c, c = c->c_next) {
if (strcmp(c->c_name, h->n_name) == 0) {
do {
prev = c;
c = c->c_next;
} while (c != NULL &&
strcmp(c->c_name, h->n_name) == 0);
break;
}
}
/*
* Insert new command to update host.
*/
nc = ALLOC(cmd);
nc->c_type = ARROW;
nc->c_name = h->n_name;
nc->c_label = label;
nc->c_files = files;
nc->c_cmds = scmds;
nc->c_flags = 0;
nc->c_next = c;
if (prev == NULL)
cmds = nc;
else
prev->c_next = nc;
/* update last_cmd if appending nc to cmds */
if (c == NULL)
last_cmd = nc;
}
}
/*
* Append DCOLON command to the end of the command list since these are always
* executed in the order they appear in the distfile.
*/
void
append(char *label, struct namelist *files, char *stamp, struct subcmd *scmds)
{
struct cmd *c;
c = ALLOC(cmd);
c->c_type = DCOLON;
c->c_name = stamp;
c->c_label = label;
c->c_files = expand(files, E_ALL);
c->c_cmds = scmds;
c->c_next = NULL;
if (cmds == NULL)
cmds = last_cmd = c;
else {
last_cmd->c_next = c;
last_cmd = c;
}
}
/*
* Error printing routine in parser.
*/
void
yyerror(char *s)
{
error("Error in distfile: line %d: %s", yylineno, s);
}
/*
* Allocate a namelist structure.
*/
struct namelist *
makenl(char *name)
{
struct namelist *nl;
debugmsg(DM_CALL, "makenl(%s)", name == NULL ? "null" : name);
nl = ALLOC(namelist);
nl->n_name = name;
nl->n_regex = NULL;
nl->n_next = NULL;
return(nl);
}
/*
* Is the name p in the namelist nl?
*/
static int
innl(struct namelist *nl, char *p)
{
for ( ; nl; nl = nl->n_next)
if (!strcmp(p, nl->n_name))
return(1);
return(0);
}
/*
* Join two namelists.
*/
static struct namelist *
addnl(struct namelist *n1, struct namelist *n2)
{
struct namelist *nl, *prev;
n1 = expand(n1, E_VARS);
n2 = expand(n2, E_VARS);
for (prev = NULL, nl = NULL; n1; n1 = n1->n_next, prev = nl) {
nl = makenl(n1->n_name);
nl->n_next = prev;
}
for (; n2; n2 = n2->n_next)
if (!innl(nl, n2->n_name)) {
nl = makenl(n2->n_name);
nl->n_next = prev;
prev = nl;
}
return(prev);
}
/*
* Copy n1 except for elements that are in n2.
*/
static struct namelist *
subnl(struct namelist *n1, struct namelist *n2)
{
struct namelist *nl, *prev;
n1 = expand(n1, E_VARS);
n2 = expand(n2, E_VARS);
for (prev = NULL; n1; n1 = n1->n_next)
if (!innl(n2, n1->n_name)) {
nl = makenl(n1->n_name);
nl->n_next = prev;
prev = nl;
}
return(prev);
}
/*
* Copy all items of n1 that are also in n2.
*/
static struct namelist *
andnl(struct namelist *n1, struct namelist *n2)
{
struct namelist *nl, *prev;
n1 = expand(n1, E_VARS);
n2 = expand(n2, E_VARS);
for (prev = NULL; n1; n1 = n1->n_next)
if (innl(n2, n1->n_name)) {
nl = makenl(n1->n_name);
nl->n_next = prev;
prev = nl;
}
return(prev);
}
/*
* Make a sub command for lists of variables, commands, etc.
*/
struct subcmd *
makesubcmd(int type)
{
struct subcmd *sc;
sc = ALLOC(subcmd);
sc->sc_type = type;
sc->sc_args = NULL;
sc->sc_next = NULL;
sc->sc_name = NULL;
return(sc);
}
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