/*
* Copyright (c) 2019 Tracey Emery <tracey@traceyemery.net>
* 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/queue.h>
#include <ctype.h>
#include <err.h>
#include <limits.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gotweb.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;
const struct got_error* error;
} *file, *topfile;
struct file *pushfile(const char *);
int popfile(void);
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);
static const struct got_error* gerror = NULL;
char *syn_err;
struct gotweb_conf *gw_conf;
typedef struct {
union {
int64_t number;
char *string;
} v;
int lineno;
} YYSTYPE;
%}
%token GOT_WWW_PATH GOT_MAX_REPOS GOT_SITE_NAME GOT_SITE_OWNER GOT_SITE_LINK
%token GOT_LOGO GOT_LOGO_URL GOT_SHOW_REPO_OWNER GOT_SHOW_REPO_AGE
%token GOT_SHOW_REPO_DESCRIPTION GOT_MAX_REPOS_DISPLAY GOT_REPOS_PATH
%token GOT_MAX_COMMITS_DISPLAY ON ERROR GOT_SHOW_SITE_OWNER
%token GOT_SHOW_REPO_CLONEURL
%token <v.string> STRING
%token <v.number> NUMBER
%type <v.number> boolean
%%
grammar : /* empty */
| grammar '\n'
| grammar main '\n'
| grammar error '\n' { file->errors++; }
;
boolean : STRING {
if (strcasecmp($1, "true") == 0 ||
strcasecmp($1, "yes") == 0)
$$ = 1;
else if (strcasecmp($1, "false") == 0 ||
strcasecmp($1, "off") == 0 ||
strcasecmp($1, "no") == 0)
$$ = 0;
else {
yyerror("invalid boolean value '%s'", $1);
free($1);
YYERROR;
}
free($1);
}
| ON { $$ = 1; }
;
main : GOT_REPOS_PATH STRING {
if ((gw_conf->got_repos_path = strdup($2)) == NULL)
errx(1, "out of memory");
}
| GOT_WWW_PATH STRING {
if ((gw_conf->got_www_path = strdup($2)) == NULL)
errx(1, "out of memory");
}
| GOT_MAX_REPOS NUMBER {
if ($2 > 0)
gw_conf->got_max_repos = $2;
}
| GOT_SITE_NAME STRING {
if ((gw_conf->got_site_name = strdup($2)) == NULL)
errx(1, "out of memory");
}
| GOT_SITE_OWNER STRING {
if ((gw_conf->got_site_owner = strdup($2)) == NULL)
errx(1, "out of memory");
}
| GOT_SITE_LINK STRING {
if ((gw_conf->got_site_link = strdup($2)) == NULL)
errx(1, "out of memory");
}
| GOT_LOGO STRING {
if ((gw_conf->got_logo = strdup($2)) == NULL)
errx(1, "out of memory");
}
| GOT_LOGO_URL STRING {
if ((gw_conf->got_logo_url = strdup($2)) == NULL)
errx(1, "out of memory");
}
| GOT_SHOW_SITE_OWNER boolean {
gw_conf->got_show_site_owner = $2;
}
| GOT_SHOW_REPO_OWNER boolean {
gw_conf->got_show_repo_owner = $2;
}
| GOT_SHOW_REPO_AGE boolean { gw_conf->got_show_repo_age = $2; }
| GOT_SHOW_REPO_DESCRIPTION boolean {
gw_conf->got_show_repo_description = $2;
}
| GOT_SHOW_REPO_CLONEURL boolean {
gw_conf->got_show_repo_cloneurl = $2;
}
| GOT_MAX_REPOS_DISPLAY NUMBER {
if ($2 > 0)
gw_conf->got_max_repos_display = $2;
}
| GOT_MAX_COMMITS_DISPLAY NUMBER {
if ($2 > 0)
gw_conf->got_max_commits_display = $2;
}
;
%%
struct keywords {
const char *k_name;
int k_val;
};
int
yyerror(const char *fmt, ...)
{
va_list ap;
char *msg = NULL;
static char err_msg[512];
file->errors++;
va_start(ap, fmt);
if (vasprintf(&msg, fmt, ap) == -1)
errx(1, "yyerror vasprintf");
va_end(ap);
snprintf(err_msg, sizeof(err_msg), "%s:%d: %s", file->name,
yylval.lineno, msg);
gerror = got_error_from_errno2("parse_error", err_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[] = {
{ "got_logo", GOT_LOGO },
{ "got_logo_url", GOT_LOGO_URL },
{ "got_max_commits_display", GOT_MAX_COMMITS_DISPLAY },
{ "got_max_repos", GOT_MAX_REPOS },
{ "got_max_repos_display", GOT_MAX_REPOS_DISPLAY },
{ "got_repos_path", GOT_REPOS_PATH },
{ "got_show_repo_age", GOT_SHOW_REPO_AGE },
{ "got_show_repo_cloneurl", GOT_SHOW_REPO_CLONEURL },
{ "got_show_repo_description", GOT_SHOW_REPO_DESCRIPTION },
{ "got_show_repo_owner", GOT_SHOW_REPO_OWNER },
{ "got_show_site_owner", GOT_SHOW_SITE_OWNER },
{ "got_site_link", GOT_SITE_LINK },
{ "got_site_name", GOT_SITE_NAME },
{ "got_site_owner", GOT_SITE_OWNER },
{ "got_www_path", GOT_WWW_PATH },
};
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;
int quotec, next, c;
int token;
p = buf;
while ((c = lgetc(0)) == ' ' || c == '\t')
; /* nothing */
yylval.lineno = file->lineno;
if (c == '#')
while ((c = lgetc(0)) != '\n' && c != EOF)
; /* nothing */
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 || next == ' ' ||
next == '\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)
errx(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 ((size_t)(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 != '#' && \
x != ','))
if (isalnum(c) || c == ':' || c == '_' || c == '*') {
do {
*p++ = c;
if ((size_t)(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)
errx(1, "yylex: strdup");
return (token);
}
if (c == '\n') {
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF)
return (0);
return (c);
}
struct file *
pushfile(const char *name)
{
struct file *nfile;
if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
gerror = got_error(GOT_ERR_NO_SPACE);
return (NULL);
}
if ((nfile->name = strdup(name)) == NULL) {
gerror = got_error(GOT_ERR_NO_SPACE);
free(nfile);
return (NULL);
}
if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
gerror = got_error_from_errno2("parse_conf", nfile->name);
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);
}
const struct got_error*
parse_conf(const char *filename, struct gotweb_conf *gconf)
{
static const struct got_error* error = NULL;
gw_conf = gconf;
if ((gw_conf->got_repos_path = strdup(D_GOTPATH)) == NULL)
err(1, "strdup");
if ((gw_conf->got_www_path = strdup(D_GOTWWW)) == NULL)
err(1, "strdup");
if ((gw_conf->got_site_name = strdup(D_SITENAME)) == NULL)
err(1, "strdup");
if ((gw_conf->got_site_owner = strdup(D_SITEOWNER)) == NULL)
err(1, "strdup");
if ((gw_conf->got_site_link = strdup(D_SITELINK)) == NULL)
err(1, "strdup");
if ((gw_conf->got_logo = strdup(D_GOTLOGO)) == NULL)
err(1, "strdup");
if ((gw_conf->got_logo_url = strdup(D_GOTURL)) == NULL)
err(1, "strdup");
gw_conf->got_show_site_owner = D_SHOWSOWNER;
gw_conf->got_show_repo_owner = D_SHOWROWNER;
gw_conf->got_show_repo_age = D_SHOWAGE;
gw_conf->got_show_repo_description = D_SHOWDESC;
gw_conf->got_show_repo_cloneurl = D_SHOWURL;
gw_conf->got_max_repos = D_MAXREPO;
gw_conf->got_max_repos_display = D_MAXREPODISP;
gw_conf->got_max_commits_display = D_MAXCOMMITDISP;
if ((file = pushfile(filename)) == NULL) {
goto done;
}
topfile = file;
yyparse();
popfile();
if (gerror)
error = gerror;
done:
return error;
}
