/*
* uhttpd - Tiny single-threaded httpd - CGI handler
*
- * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
+ * Copyright (C) 2010-2011 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
bufptr = &buf[0];
- for( pos = 0; pos < len; pos++ )
+ for( pos = 0; pos < *off; pos++ )
{
if( !hdrname && (buf[pos] == ':') )
{
else if( (buf[pos] == '\r') || (buf[pos] == '\n') )
{
- buf[pos++] = 0;
-
if( ! hdrname )
break;
+ buf[pos++] = 0;
+
if( (pos < len) && (buf[pos] == '\n') )
pos++;
}
-void uh_cgi_request(struct client *cl, struct http_request *req, struct path_info *pi)
-{
- int i, hdroff, bufoff;
+void uh_cgi_request(
+ struct client *cl, struct http_request *req,
+ struct path_info *pi, struct interpreter *ip
+) {
+ int i, hdroff, bufoff, rv;
int hdrlen = 0;
int buflen = 0;
int fd_max = 0;
fd_set reader;
fd_set writer;
+ sigset_t ss;
+
struct sigaction sa;
struct timeval timeout;
struct http_response *res;
/* exec child */
case 0:
+ /* unblock signals */
+ sigemptyset(&ss);
+ sigprocmask(SIG_SETMASK, &ss, NULL);
+
/* restore SIGTERM */
sa.sa_flags = 0;
sa.sa_handler = SIG_DFL;
dup2(rfd[1], 1);
dup2(wfd[0], 0);
- /* check for regular, world-executable file */
- if( (pi->stat.st_mode & S_IFREG) &&
- (pi->stat.st_mode & S_IXOTH)
+ /* avoid leaking our pipe into child-child processes */
+ fd_cloexec(rfd[1]);
+ fd_cloexec(wfd[0]);
+
+ /* check for regular, world-executable file _or_ interpreter */
+ if( ((pi->stat.st_mode & S_IFREG) &&
+ (pi->stat.st_mode & S_IXOTH)) || (ip != NULL)
) {
/* build environment */
clearenv();
if( chdir(pi->root) )
perror("chdir()");
- execl(pi->phys, pi->phys, NULL);
+ if( ip != NULL )
+ execl(ip->path, ip->path, pi->phys, NULL);
+ else
+ execl(pi->phys, pi->phys, NULL);
/* in case it fails ... */
printf(
"Status: 500 Internal Server Error\r\n\r\n"
"Unable to launch the requested CGI program:\n"
" %s: %s\n",
- pi->phys, strerror(errno)
+ ip ? ip->path : pi->phys, strerror(errno)
);
}
memset(hdr, 0, sizeof(hdr));
- timeout.tv_sec = cl->server->conf->script_timeout;
- timeout.tv_usec = 0;
-
-#define ensure(x) \
- do { if( x < 0 ) goto out; } while(0)
-
/* I/O loop, watch our pipe ends and dispatch child reads/writes from/to socket */
while( 1 )
{
FD_SET(rfd[0], &reader);
FD_SET(wfd[1], &writer);
+ timeout.tv_sec = (header_sent < 1) ? cl->server->conf->script_timeout : 3;
+ timeout.tv_usec = 0;
+
+ ensure_out(rv = select_intr(fd_max, &reader,
+ (content_length > -1) ? &writer : NULL, NULL, &timeout));
+
+ /* timeout */
+ if( rv == 0 )
+ {
+ ensure_out(kill(child, 0));
+ }
+
/* wait until we can read or write or both */
- if( select_intr(fd_max, &reader,
- (content_length > -1) ? &writer : NULL, NULL,
- (header_sent < 1) ? &timeout : NULL) > 0
- ) {
+ else if( rv > 0 )
+ {
/* ready to write to cgi program */
if( FD_ISSET(wfd[1], &writer) )
{
if( content_length > 0 )
{
/* read it from socket ... */
- if( (buflen = uh_tcp_recv(cl, buf, min(content_length, sizeof(buf)))) > 0 )
+ ensure_out(buflen = uh_tcp_recv(cl, buf,
+ min(content_length, sizeof(buf))));
+
+ if( buflen > 0 )
{
/* ... and write it to child's stdin */
if( write(wfd[1], buf, buflen) < 0 )
if( (res = uh_cgi_header_parse(hdr, hdrlen, &hdroff)) != NULL )
{
/* write status */
- ensure(uh_http_sendf(cl, NULL,
+ ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f %03d %s\r\n"
"Connection: close\r\n",
req->version, res->statuscode,
if( !uh_cgi_header_lookup(res, "Location") &&
!uh_cgi_header_lookup(res, "Content-Type")
) {
- ensure(uh_http_send(cl, NULL,
+ ensure_out(uh_http_send(cl, NULL,
"Content-Type: text/plain\r\n", -1));
}
if( (req->version > 1.0) &&
!uh_cgi_header_lookup(res, "Transfer-Encoding")
) {
- ensure(uh_http_send(cl, NULL,
+ ensure_out(uh_http_send(cl, NULL,
"Transfer-Encoding: chunked\r\n", -1));
}
/* write headers from CGI program */
foreach_header(i, res->headers)
{
- ensure(uh_http_sendf(cl, NULL, "%s: %s\r\n",
+ ensure_out(uh_http_sendf(cl, NULL, "%s: %s\r\n",
res->headers[i], res->headers[i+1]));
}
/* terminate header */
- ensure(uh_http_send(cl, NULL, "\r\n", -1));
+ ensure_out(uh_http_send(cl, NULL, "\r\n", -1));
/* push out remaining head buffer */
if( hdroff < hdrlen )
- ensure(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
+ ensure_out(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
}
/* ... failed and head buffer exceeded */
else if( hdrlen >= sizeof(hdr) )
{
- ensure(uh_cgi_error_500(cl, req,
+ ensure_out(uh_cgi_error_500(cl, req,
"The CGI program generated an invalid response:\n\n"));
- ensure(uh_http_send(cl, req, hdr, hdrlen));
+ ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* ... failed but free buffer space, try again */
/* push out remaining read buffer */
if( bufoff < buflen )
- ensure(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
+ ensure_out(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
header_sent = 1;
continue;
/* headers complete, pass through buffer to socket */
- ensure(uh_http_send(cl, req, buf, buflen));
+ ensure_out(uh_http_send(cl, req, buf, buflen));
}
/* looks like eof from child */
* build the required headers here.
*/
- ensure(uh_http_sendf(cl, NULL,
+ ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f 200 OK\r\n"
"Content-Type: text/plain\r\n"
"%s\r\n",
? "Transfer-Encoding: chunked\r\n" : ""
));
- ensure(uh_http_send(cl, req, hdr, hdrlen));
+ ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* send final chunk if we're in chunked transfer mode */
- ensure(uh_http_send(cl, req, "", 0));
+ ensure_out(uh_http_send(cl, req, "", 0));
break;
}
}
{
if( (errno != EINTR) && ! header_sent )
{
- ensure(uh_http_sendhf(cl, 504, "Gateway Timeout",
+ ensure_out(uh_http_sendhf(cl, 504, "Gateway Timeout",
"The CGI script took too long to produce "
"a response"));
}
/* send final chunk if we're in chunked transfer mode */
- ensure(uh_http_send(cl, req, "", 0));
+ ensure_out(uh_http_send(cl, req, "", 0));
break;
}
projects / openwrt.git / blobdiff