/*
* Copyright (c) 2019, 2020 Tracey Emery <tracey@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/queue.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 <ifaddrs.h>
#include <imsg.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include "got_error.h"
#include "gotweb.h"
TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
static struct file {
TAILQ_ENTRY(file) entry;
FILE *stream;
char *name;
size_t ungetpos;
size_t ungetsize;
u_char *ungetbuf;
int eof_reached;
int lineno;
} *file, *topfile;
static const struct got_error* pushfile(struct file**, 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 igetc(void);
int lgetc(int);
void 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 *);
const struct got_error* gerror = NULL;
struct gotweb_config *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'
;
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 {
gw_conf->got_repos_path = strdup($2);
if (gw_conf->got_repos_path== NULL) {
free($2);
yyerror("strdup");
YYERROR;
}
free($2);
}
| GOT_MAX_REPOS NUMBER {
if ($2 > 0)
gw_conf->got_max_repos = $2;
}
| GOT_SITE_NAME STRING {
gw_conf->got_site_name = strdup($2);
if (gw_conf->got_site_name == NULL) {
free($2);
yyerror("strdup");
YYERROR;
}
free($2);
}
| GOT_SITE_OWNER STRING {
gw_conf->got_site_owner = strdup($2);
if (gw_conf->got_site_owner == NULL) {
free($2);
yyerror("strdup");
YYERROR;
}
free($2);
}
| GOT_SITE_LINK STRING {
gw_conf->got_site_link = strdup($2);
if (gw_conf->got_site_link == NULL) {
free($2);
yyerror("strdup");
YYERROR;
}
free($2);
}
| GOT_LOGO STRING {
gw_conf->got_logo = strdup($2);
if (gw_conf->got_logo== NULL) {
free($2);
yyerror("strdup");
YYERROR;
}
free($2);
}
| GOT_LOGO_URL STRING {
gw_conf->got_logo_url = strdup($2);
if (gw_conf->got_logo_url== NULL) {
free($2);
yyerror("strdup");
YYERROR;
}
free($2);
}
| 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;
char *err = NULL;
va_start(ap, fmt);
if (vasprintf(&msg, fmt, ap) == -1) {
gerror = got_error_from_errno("vasprintf");
return 0;
}
va_end(ap);
if (asprintf(&err, "%s:%d: %s", file->name, yylval.lineno, msg) == -1) {
gerror = got_error_from_errno("asprintf");
return(0);
}
gerror = got_error_msg(GOT_ERR_PARSE_Y_YY, strdup(err));
free(msg);
free(err);
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 },
};
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 START_EXPAND 1
#define DONE_EXPAND 2
static int expanding;
int
igetc(void)
{
int c;
while (1) {
if (file->ungetpos > 0)
c = file->ungetbuf[--file->ungetpos];
else
c = getc(file->stream);
if (c == START_EXPAND)
expanding = 1;
else if (c == DONE_EXPAND)
expanding = 0;
else
break;
}
return (c);
}
int
lgetc(int quotec)
{
int c, next;
if (quotec) {
if ((c = igetc()) == EOF) {
yyerror("reached end of file while parsing "
"quoted string");
if (file == topfile || popfile() == EOF)
return (EOF);
return (quotec);
}
return (c);
}
while ((c = igetc()) == '\\') {
next = igetc();
if (next != '\n') {
c = next;
break;
}
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF) {
/*
* Fake EOL when hit EOF for the first time. This gets line
* count right if last line in included file is syntactically
* invalid and has no newline.
*/
if (file->eof_reached == 0) {
file->eof_reached = 1;
return ('\n');
}
while (c == EOF) {
if (file == topfile || popfile() == EOF)
return (EOF);
c = igetc();
}
}
return (c);
}
void
lungetc(int c)
{
if (c == EOF)
return;
if (file->ungetpos >= file->ungetsize) {
void *p = reallocarray(file->ungetbuf, file->ungetsize, 2);
if (p == NULL)
err(1, "%s", __func__);
file->ungetbuf = p;
file->ungetsize *= 2;
}
file->ungetbuf[file->ungetpos++] = c;
}
int
findeol(void)
{
int c;
/* Skip to either EOF or the first real EOL. */
while (1) {
c = lgetc(0);
if (c == '\n') {
file->lineno++;
break;
}
if (c == EOF)
break;
}
return (ERROR);
}
int
yylex(void)
{
unsigned char buf[8096];
unsigned 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 == '$' && !expanding) {
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());
}
p = val + strlen(val) - 1;
lungetc(DONE_EXPAND);
while (p >= val) {
lungetc(*p);
p--;
}
lungetc(START_EXPAND);
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, "%s", __func__);
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 != ','))
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, "%s", __func__);
return (token);
}
if (c == '\n') {
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF)
return (0);
return (c);
}
static const struct got_error*
pushfile(struct file **nfile, const char *name)
{
const struct got_error* error = NULL;
if (((*nfile) = calloc(1, sizeof(struct file))) == NULL)
return got_error_from_errno2(__func__, "calloc");
if (((*nfile)->name = strdup(name)) == NULL) {
free(nfile);
return got_error_from_errno2(__func__, "strdup");
}
if (((*nfile)->stream = fopen((*nfile)->name, "r")) == NULL) {
char *msg = NULL;
if (asprintf(&msg, "%s", (*nfile)->name) == -1)
return got_error_from_errno("asprintf");
error = got_error_msg(GOT_ERR_NO_CONFIG_FILE, msg);
free((*nfile)->name);
free((*nfile));
free(msg);
return error;
}
(*nfile)->lineno = TAILQ_EMPTY(&files) ? 1 : 0;
(*nfile)->ungetsize = 16;
(*nfile)->ungetbuf = malloc((*nfile)->ungetsize);
if ((*nfile)->ungetbuf == NULL) {
fclose((*nfile)->stream);
free((*nfile)->name);
free((*nfile));
return got_error_from_errno2(__func__, "malloc");
}
TAILQ_INSERT_TAIL(&files, (*nfile), entry);
return error;
}
int
popfile(void)
{
struct file *prev = NULL;
TAILQ_REMOVE(&files, file, entry);
fclose(file->stream);
free(file->name);
free(file->ungetbuf);
free(file);
file = prev;
return (file ? 0 : EOF);
}
const struct got_error*
parse_gotweb_config(struct gotweb_config **gconf, const char *filename)
{
gw_conf = malloc(sizeof(struct gotweb_config));
if (gw_conf == NULL) {
gerror = got_error_from_errno("malloc");
goto done;
}
gw_conf->got_repos_path = strdup(D_GOTPATH);
if (gw_conf->got_repos_path == NULL) {
gerror = got_error_from_errno("strdup");
goto done;
}
gw_conf->got_site_name = strdup(D_SITENAME);
if (gw_conf->got_site_name == NULL) {
gerror = got_error_from_errno("strdup");
goto done;
}
gw_conf->got_site_owner = strdup(D_SITEOWNER);
if (gw_conf->got_site_owner == NULL) {
gerror = got_error_from_errno("strdup");
goto done;
}
gw_conf->got_site_link = strdup(D_SITELINK);
if (gw_conf->got_site_link == NULL) {
gerror = got_error_from_errno("strdup");
goto done;
}
gw_conf->got_logo = strdup(D_GOTLOGO);
if (gw_conf->got_logo == NULL) {
gerror = got_error_from_errno("strdup");
goto done;
}
gw_conf->got_logo_url = strdup(D_GOTURL);
if (gw_conf->got_logo_url == NULL) {
gerror = got_error_from_errno("strdup");
goto done;
}
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;
/*
* We don't require that the gotweb config file exists
* So reset gerror if it doesn't exist and goto done.
*/
gerror = pushfile(&file, filename);
if (gerror && gerror->code == GOT_ERR_NO_CONFIG_FILE) {
gerror = NULL;
goto done;
} else if (gerror)
return gerror;
topfile = file;
yyparse();
popfile();
done:
*gconf = gw_conf;
return gerror;
}
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");
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);
}
