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https://github.com/apache/httpd/pull/209
diff --git a/modules/generators/cgi_common.h b/modules/generators/cgi_common.h
new file mode 100644
index 0000000000..69df73ce68
--- /dev/null
+++ b/modules/generators/cgi_common.h
@@ -0,0 +1,629 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr.h"
+#include "apr_strings.h"
+#include "apr_buckets.h"
+#include "apr_lib.h"
+#include "apr_poll.h"
+
+#define APR_WANT_STRFUNC
+#define APR_WANT_MEMFUNC
+#include "apr_want.h"
+
+#include "httpd.h"
+#include "util_filter.h"
+
+static APR_OPTIONAL_FN_TYPE(ap_ssi_get_tag_and_value) *cgi_pfn_gtv;
+static APR_OPTIONAL_FN_TYPE(ap_ssi_parse_string) *cgi_pfn_ps;
+
+/* These functions provided by mod_cgi.c/mod_cgid.c still. */
+static int log_script(request_rec *r, cgi_server_conf * conf, int ret,
+ char *dbuf, const char *sbuf, apr_bucket_brigade *bb,
+ apr_file_t *script_err);
+static apr_status_t include_cgi(include_ctx_t *ctx, ap_filter_t *f,
+ apr_bucket_brigade *bb, char *s);
+static apr_status_t include_cmd(include_ctx_t *ctx, ap_filter_t *f,
+ apr_bucket_brigade *bb, const char *command);
+
+/* Read and discard all output from the brigade. Note that with the
+ * CGI bucket, the brigade will become empty once the script's stdout
+ * is closed (or on error/timeout), but the stderr output may not have
+ * been entirely captured at this point. */
+static void discard_script_output(apr_bucket_brigade *bb)
+{
+ apr_bucket *e;
+ const char *buf;
+ apr_size_t len;
+
+ for (e = APR_BRIGADE_FIRST(bb);
+ e != APR_BRIGADE_SENTINEL(bb) && !APR_BUCKET_IS_EOS(e);
+ e = APR_BRIGADE_FIRST(bb))
+ {
+ if (apr_bucket_read(e, &buf, &len, APR_BLOCK_READ)) {
+ break;
+ }
+ apr_bucket_delete(e);
+ }
+}
+
+static int log_scripterror(request_rec *r, cgi_server_conf *conf, int ret,
+ apr_status_t rv, const char *logno,
+ const char *error)
+{
+ apr_file_t *f = NULL;
+ apr_finfo_t finfo;
+ char time_str[APR_CTIME_LEN];
+
+ /* Intentional no APLOGNO */
+ /* Callee provides APLOGNO in error text */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "%sstderr from %s: %s", logno ? logno : "", r->filename, error);
+
+ /* XXX Very expensive mainline case! Open, then getfileinfo! */
+ if (!conf->logname ||
+ ((apr_stat(&finfo, conf->logname,
+ APR_FINFO_SIZE, r->pool) == APR_SUCCESS) &&
+ (finfo.size > conf->logbytes)) ||
+ (apr_file_open(&f, conf->logname,
+ APR_APPEND|APR_WRITE|APR_CREATE, APR_OS_DEFAULT,
+ r->pool) != APR_SUCCESS)) {
+ return ret;
+ }
+
+ /* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */
+ apr_ctime(time_str, apr_time_now());
+ apr_file_printf(f, "%%%% [%s] %s %s%s%s %s\n", time_str, r->method, r->uri,
+ r->args ? "?" : "", r->args ? r->args : "", r->protocol);
+ /* "%% 500 /usr/local/apache/cgi-bin */
+ apr_file_printf(f, "%%%% %d %s\n", ret, r->filename);
+
+ apr_file_printf(f, "%%error\n%s\n", error);
+
+ apr_file_close(f);
+ return ret;
+}
+
+/* Soak up stderr from a script and redirect it to the error log.
+ */
+static apr_status_t log_script_err(request_rec *r, apr_file_t *script_err)
+{
+ char argsbuffer[HUGE_STRING_LEN];
+ char *newline;
+ apr_status_t rv;
+ cgi_server_conf *conf = ap_get_module_config(r->server->module_config, &cgi_module);
+
+ while ((rv = apr_file_gets(argsbuffer, HUGE_STRING_LEN,
+ script_err)) == APR_SUCCESS) {
+
+ newline = strchr(argsbuffer, '\n');
+ if (newline) {
+ char *prev = newline - 1;
+ if (prev >= argsbuffer && *prev == '\r') {
+ newline = prev;
+ }
+
+ *newline = '\0';
+ }
+ log_scripterror(r, conf, r->status, 0, APLOGNO(01215), argsbuffer);
+ }
+
+ return rv;
+}
+
+static apr_status_t cgi_handle_exec(include_ctx_t *ctx, ap_filter_t *f,
+ apr_bucket_brigade *bb)
+{
+ char *tag = NULL;
+ char *tag_val = NULL;
+ request_rec *r = f->r;
+ char *file = r->filename;
+ char parsed_string[MAX_STRING_LEN];
+
+ if (!ctx->argc) {
+ ap_log_rerror(APLOG_MARK,
+ (ctx->flags & SSI_FLAG_PRINTING)
+ ? APLOG_ERR : APLOG_WARNING,
+ 0, r, APLOGNO(03195)
+ "missing argument for exec element in %s", r->filename);
+ }
+
+ if (!(ctx->flags & SSI_FLAG_PRINTING)) {
+ return APR_SUCCESS;
+ }
+
+ if (!ctx->argc) {
+ SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
+ return APR_SUCCESS;
+ }
+
+ if (ctx->flags & SSI_FLAG_NO_EXEC) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01228) "exec used but not allowed "
+ "in %s", r->filename);
+ SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
+ return APR_SUCCESS;
+ }
+
+ while (1) {
+ cgi_pfn_gtv(ctx, &tag, &tag_val, SSI_VALUE_DECODED);
+ if (!tag || !tag_val) {
+ break;
+ }
+
+ if (!strcmp(tag, "cmd")) {
+ apr_status_t rv;
+
+ cgi_pfn_ps(ctx, tag_val, parsed_string, sizeof(parsed_string),
+ SSI_EXPAND_LEAVE_NAME);
+
+ rv = include_cmd(ctx, f, bb, parsed_string);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01229) "execution failure "
+ "for parameter \"%s\" to tag exec in file %s",
+ tag, r->filename);
+ SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
+ break;
+ }
+ }
+ else if (!strcmp(tag, "cgi")) {
+ apr_status_t rv;
+
+ cgi_pfn_ps(ctx, tag_val, parsed_string, sizeof(parsed_string),
+ SSI_EXPAND_DROP_NAME);
+
+ rv = include_cgi(ctx, f, bb, parsed_string);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01230) "invalid CGI ref "
+ "\"%s\" in %s", tag_val, file);
+ SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
+ break;
+ }
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01231) "unknown parameter "
+ "\"%s\" to tag exec in %s", tag, file);
+ SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
+ break;
+ }
+ }
+
+ return APR_SUCCESS;
+}
+
+/* Hook to register exec= handling with mod_include. */
+static void cgi_optfns_retrieve(void)
+{
+ APR_OPTIONAL_FN_TYPE(ap_register_include_handler) *cgi_pfn_reg_with_ssi;
+
+ cgi_pfn_reg_with_ssi = APR_RETRIEVE_OPTIONAL_FN(ap_register_include_handler);
+ cgi_pfn_gtv = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_get_tag_and_value);
+ cgi_pfn_ps = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_parse_string);
+
+ if (cgi_pfn_reg_with_ssi && cgi_pfn_gtv && cgi_pfn_ps) {
+ /* Required by mod_include filter. This is how mod_cgi registers
+ * with mod_include to provide processing of the exec directive.
+ */
+ cgi_pfn_reg_with_ssi("exec", cgi_handle_exec);
+ }
+}
+
+#ifdef WANT_CGI_BUCKET
+/* A CGI bucket type is needed to catch any output to stderr from the
+ * script; see PR 22030. */
+static const apr_bucket_type_t bucket_type_cgi;
+
+struct cgi_bucket_data {
+ apr_pollset_t *pollset;
+ request_rec *r;
+ apr_interval_time_t timeout;
+};
+
+/* Create a CGI bucket using pipes from script stdout 'out'
+ * and stderr 'err', for request 'r'. */
+static apr_bucket *cgi_bucket_create(request_rec *r,
+ apr_interval_time_t timeout,
+ apr_file_t *out, apr_file_t *err,
+ apr_bucket_alloc_t *list)
+{
+ apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);
+ apr_status_t rv;
+ apr_pollfd_t fd;
+ struct cgi_bucket_data *data = apr_palloc(r->pool, sizeof *data);
+
+ /* Disable APR timeout handling since we'll use poll() entirely. */
+ apr_file_pipe_timeout_set(out, 0);
+ apr_file_pipe_timeout_set(err, 0);
+
+ APR_BUCKET_INIT(b);
+ b->free = apr_bucket_free;
+ b->list = list;
+ b->type = &bucket_type_cgi;
+ b->length = (apr_size_t)(-1);
+ b->start = -1;
+
+ /* Create the pollset */
+ rv = apr_pollset_create(&data->pollset, 2, r->pool, 0);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01217)
+ "apr_pollset_create(); check system or user limits");
+ return NULL;
+ }
+
+ fd.desc_type = APR_POLL_FILE;
+ fd.reqevents = APR_POLLIN;
+ fd.p = r->pool;
+ fd.desc.f = out; /* script's stdout */
+ fd.client_data = (void *)1;
+ rv = apr_pollset_add(data->pollset, &fd);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01218)
+ "apr_pollset_add(); check system or user limits");
+ return NULL;
+ }
+
+ fd.desc.f = err; /* script's stderr */
+ fd.client_data = (void *)2;
+ rv = apr_pollset_add(data->pollset, &fd);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01219)
+ "apr_pollset_add(); check system or user limits");
+ return NULL;
+ }
+
+ data->r = r;
+ data->timeout = timeout;
+ b->data = data;
+ return b;
+}
+
+/* Create a duplicate CGI bucket using given bucket data */
+static apr_bucket *cgi_bucket_dup(struct cgi_bucket_data *data,
+ apr_bucket_alloc_t *list)
+{
+ apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);
+ APR_BUCKET_INIT(b);
+ b->free = apr_bucket_free;
+ b->list = list;
+ b->type = &bucket_type_cgi;
+ b->length = (apr_size_t)(-1);
+ b->start = -1;
+ b->data = data;
+ return b;
+}
+
+/* Handle stdout from CGI child. Duplicate of logic from the _read
+ * method of the real APR pipe bucket implementation. */
+static apr_status_t cgi_read_stdout(apr_bucket *a, apr_file_t *out,
+ const char **str, apr_size_t *len)
+{
+ char *buf;
+ apr_status_t rv;
+
+ *str = NULL;
+ *len = APR_BUCKET_BUFF_SIZE;
+ buf = apr_bucket_alloc(*len, a->list); /* XXX: check for failure? */
+
+ rv = apr_file_read(out, buf, len);
+
+ if (rv != APR_SUCCESS && rv != APR_EOF) {
+ apr_bucket_free(buf);
+ return rv;
+ }
+
+ if (*len > 0) {
+ struct cgi_bucket_data *data = a->data;
+ apr_bucket_heap *h;
+
+ /* Change the current bucket to refer to what we read */
+ a = apr_bucket_heap_make(a, buf, *len, apr_bucket_free);
+ h = a->data;
+ h->alloc_len = APR_BUCKET_BUFF_SIZE; /* note the real buffer size */
+ *str = buf;
+ APR_BUCKET_INSERT_AFTER(a, cgi_bucket_dup(data, a->list));
+ }
+ else {
+ apr_bucket_free(buf);
+ a = apr_bucket_immortal_make(a, "", 0);
+ *str = a->data;
+ }
+ return rv;
+}
+
+/* Read method of CGI bucket: polls on stderr and stdout of the child,
+ * sending any stderr output immediately away to the error log. */
+static apr_status_t cgi_bucket_read(apr_bucket *b, const char **str,
+ apr_size_t *len, apr_read_type_e block)
+{
+ struct cgi_bucket_data *data = b->data;
+ apr_interval_time_t timeout = 0;
+ apr_status_t rv;
+ int gotdata = 0;
+
+ if (block != APR_NONBLOCK_READ) {
+ timeout = data->timeout > 0 ? data->timeout : data->r->server->timeout;
+ }
+
+ do {
+ const apr_pollfd_t *results;
+ apr_int32_t num;
+
+ rv = apr_pollset_poll(data->pollset, timeout, &num, &results);
+ if (APR_STATUS_IS_TIMEUP(rv)) {
+ if (timeout) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, data->r, APLOGNO(01220)
+ "Timeout waiting for output from CGI script %s",
+ data->r->filename);
+ return rv;
+ }
+ else {
+ return APR_EAGAIN;
+ }
+ }
+ else if (APR_STATUS_IS_EINTR(rv)) {
+ continue;
+ }
+ else if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, data->r, APLOGNO(01221)
+ "poll failed waiting for CGI child");
+ return rv;
+ }
+
+ for (; num; num--, results++) {
+ if (results[0].client_data == (void *)1) {
+ /* stdout */
+ rv = cgi_read_stdout(b, results[0].desc.f, str, len);
+ if (APR_STATUS_IS_EOF(rv)) {
+ rv = APR_SUCCESS;
+ }
+ gotdata = 1;
+ } else {
+ /* stderr */
+ apr_status_t rv2 = log_script_err(data->r, results[0].desc.f);
+ if (APR_STATUS_IS_EOF(rv2)) {
+ apr_pollset_remove(data->pollset, &results[0]);
+ }
+ }
+ }
+
+ } while (!gotdata);
+
+ return rv;
+}
+
+static const apr_bucket_type_t bucket_type_cgi = {
+ "CGI", 5, APR_BUCKET_DATA,
+ apr_bucket_destroy_noop,
+ cgi_bucket_read,
+ apr_bucket_setaside_notimpl,
+ apr_bucket_split_notimpl,
+ apr_bucket_copy_notimpl
+};
+
+#endif /* WANT_CGI_BUCKET */
+
+/* Handle the CGI response output, having set up the brigade with the
+ * CGI or PIPE bucket as appropriate. */
+static int cgi_handle_response(request_rec *r, int nph, apr_bucket_brigade *bb,
+ apr_interval_time_t timeout, cgi_server_conf *conf,
+ char *logdata, apr_file_t *script_err)
+{
+ apr_status_t rv;
+
+ /* Handle script return... */
+ if (!nph) {
+ const char *location;
+ char sbuf[MAX_STRING_LEN];
+ int ret;
+
+ if ((ret = ap_scan_script_header_err_brigade_ex(r, bb, sbuf,
+ APLOG_MODULE_INDEX)))
+ {
+ /* In the case of a timeout reading script output, clear
+ * the brigade to avoid a second attempt to read the
+ * output. */
+ if (ret == HTTP_GATEWAY_TIME_OUT) {
+ apr_brigade_cleanup(bb);
+ }
+
+ ret = log_script(r, conf, ret, logdata, sbuf, bb, script_err);
+
+ /*
+ * ret could be HTTP_NOT_MODIFIED in the case that the CGI script
+ * does not set an explicit status and ap_meets_conditions, which
+ * is called by ap_scan_script_header_err_brigade, detects that
+ * the conditions of the requests are met and the response is
+ * not modified.
+ * In this case set r->status and return OK in order to prevent
+ * running through the error processing stack as this would
+ * break with mod_cache, if the conditions had been set by
+ * mod_cache itself to validate a stale entity.
+ * BTW: We circumvent the error processing stack anyway if the
+ * CGI script set an explicit status code (whatever it is) and
+ * the only possible values for ret here are:
+ *
+ * HTTP_NOT_MODIFIED (set by ap_meets_conditions)
+ * HTTP_PRECONDITION_FAILED (set by ap_meets_conditions)
+ * HTTP_INTERNAL_SERVER_ERROR (if something went wrong during the
+ * processing of the response of the CGI script, e.g broken headers
+ * or a crashed CGI process).
+ */
+ if (ret == HTTP_NOT_MODIFIED) {
+ r->status = ret;
+ return OK;
+ }
+
+ return ret;
+ }
+
+ location = apr_table_get(r->headers_out, "Location");
+
+ if (location && r->status == 200) {
+ /* For a redirect whether internal or not, discard any
+ * remaining stdout from the script, and log any remaining
+ * stderr output, as normal. */
+ discard_script_output(bb);
+ apr_brigade_destroy(bb);
+
+ if (script_err) {
+ apr_file_pipe_timeout_set(script_err, timeout);
+ log_script_err(r, script_err);
+ }
+ }
+
+ if (location && location[0] == '/' && r->status == 200) {
+ /* This redirect needs to be a GET no matter what the original
+ * method was.
+ */
+ r->method = "GET";
+ r->method_number = M_GET;
+
+ /* We already read the message body (if any), so don't allow
+ * the redirected request to think it has one. We can ignore
+ * Transfer-Encoding, since we used REQUEST_CHUNKED_ERROR.
+ */
+ apr_table_unset(r->headers_in, "Content-Length");
+
+ ap_internal_redirect_handler(location, r);
+ return OK;
+ }
+ else if (location && r->status == 200) {
+ /* XXX: Note that if a script wants to produce its own Redirect
+ * body, it now has to explicitly *say* "Status: 302"
+ */
+ discard_script_output(bb);
+ apr_brigade_destroy(bb);
+ return HTTP_MOVED_TEMPORARILY;
+ }
+
+ rv = ap_pass_brigade(r->output_filters, bb);
+ }
+ else /* nph */ {
+ struct ap_filter_t *cur;
+
+ /* get rid of all filters up through protocol... since we
+ * haven't parsed off the headers, there is no way they can
+ * work
+ */
+
+ cur = r->proto_output_filters;
+ while (cur && cur->frec->ftype < AP_FTYPE_CONNECTION) {
+ cur = cur->next;
+ }
+ r->output_filters = r->proto_output_filters = cur;
+
+ rv = ap_pass_brigade(r->output_filters, bb);
+ }
+
+ /* don't soak up script output if errors occurred writing it
+ * out... otherwise, we prolong the life of the script when the
+ * connection drops or we stopped sending output for some other
+ * reason */
+ if (script_err && rv == APR_SUCCESS && !r->connection->aborted) {
+ apr_file_pipe_timeout_set(script_err, timeout);
+ log_script_err(r, script_err);
+ }
+
+ if (script_err) apr_file_close(script_err);
+
+ return OK; /* NOT r->status, even if it has changed. */
+}
+
+/* Read the request body and write it to fd 'script_out', using 'bb'
+ * as temporary bucket brigade. If 'logbuf' is non-NULL, the first
+ * logbufbytes of stdout are stored in logbuf. */
+static apr_status_t cgi_handle_request(request_rec *r, apr_file_t *script_out,
+ apr_bucket_brigade *bb,
+ char *logbuf, apr_size_t logbufbytes)
+{
+ int seen_eos = 0;
+ int child_stopped_reading = 0;
+ apr_status_t rv;
+ int dbpos = 0;
+
+ do {
+ apr_bucket *bucket;
+
+ rv = ap_get_brigade(r->input_filters, bb, AP_MODE_READBYTES,
+ APR_BLOCK_READ, HUGE_STRING_LEN);
+
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+
+ for (bucket = APR_BRIGADE_FIRST(bb);
+ bucket != APR_BRIGADE_SENTINEL(bb);
+ bucket = APR_BUCKET_NEXT(bucket))
+ {
+ const char *data;
+ apr_size_t len;
+
+ if (APR_BUCKET_IS_EOS(bucket)) {
+ seen_eos = 1;
+ break;
+ }
+
+ /* We can't do much with this. */
+ if (APR_BUCKET_IS_FLUSH(bucket)) {
+ continue;
+ }
+
+ /* If the child stopped, we still must read to EOS. */
+ if (child_stopped_reading) {
+ continue;
+ }
+
+ /* read */
+ rv = apr_bucket_read(bucket, &data, &len, APR_BLOCK_READ);
+ if (rv) {
+ return rv;
+ }
+
+ if (logbufbytes && dbpos < logbufbytes) {
+ int cursize;
+
+ if ((dbpos + len) > logbufbytes) {
+ cursize = logbufbytes - dbpos;
+ }
+ else {
+ cursize = len;
+ }
+ memcpy(logbuf + dbpos, data, cursize);
+ dbpos += cursize;
+ }
+
+ /* Keep writing data to the child until done or too much time
+ * elapses with no progress or an error occurs.
+ */
+ rv = apr_file_write_full(script_out, data, len, NULL);
+
+ if (rv != APR_SUCCESS) {
+ /* silly script stopped reading, soak up remaining message */
+ child_stopped_reading = 1;
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(02651)
+ "Error writing request body to script %s",
+ r->filename);
+ }
+ }
+ apr_brigade_cleanup(bb);
+ }
+ while (!seen_eos);
+
+ if (logbuf) {
+ logbuf[dbpos] = '\0';
+ }
+
+ return APR_SUCCESS;
+}
diff --git a/modules/generators/config5.m4 b/modules/generators/config5.m4
index bf295217e0..086355353b 100644
--- a/modules/generators/config5.m4
+++ b/modules/generators/config5.m4
@@ -78,4 +78,15 @@ fi
APR_ADDTO(INCLUDES, [-I\$(top_srcdir)/$modpath_current])
+AC_ARG_ENABLE(cgid-fdpassing,
+ [APACHE_HELP_STRING(--enable-cgid-fdpassing,Enable experimental mod_cgid support for fd passing)],
+ [if test "$enableval" = "yes"; then
+ AC_CHECK_DECL(CMSG_DATA,
+ [AC_DEFINE([HAVE_CGID_FDPASSING], 1, [Enable FD passing support in mod_cgid])],
+ [AC_MSG_ERROR([cannot support mod_cgid fd-passing on this system])], [
+#include <sys/types.h>
+#include <sys/socket.h>])
+ fi
+])
+
APACHE_MODPATH_FINISH
diff --git a/modules/generators/mod_cgi.c b/modules/generators/mod_cgi.c
index 7e4b126c10..421124a0cb 100644
--- a/modules/generators/mod_cgi.c
+++ b/modules/generators/mod_cgi.c
@@ -61,9 +61,6 @@
module AP_MODULE_DECLARE_DATA cgi_module;
-static APR_OPTIONAL_FN_TYPE(ap_register_include_handler) *cgi_pfn_reg_with_ssi;
-static APR_OPTIONAL_FN_TYPE(ap_ssi_get_tag_and_value) *cgi_pfn_gtv;
-static APR_OPTIONAL_FN_TYPE(ap_ssi_parse_string) *cgi_pfn_ps;
static APR_OPTIONAL_FN_TYPE(ap_cgi_build_command) *cgi_build_command;
/* Read and discard the data in the brigade produced by a CGI script */
@@ -92,6 +89,15 @@ typedef struct {
apr_size_t bufbytes;
} cgi_server_conf;
+typedef struct {
+ apr_interval_time_t timeout;
+} cgi_dirconf;
+
+#if APR_FILES_AS_SOCKETS
+#define WANT_CGI_BUCKET
+#endif
+#include "cgi_common.h"
+
static void *create_cgi_config(apr_pool_t *p, server_rec *s)
{
cgi_server_conf *c =
@@ -112,6 +118,12 @@ static void *merge_cgi_config(apr_pool_t *p, void *basev, void *overridesv)
return overrides->logname ? overrides : base;
}
+static void *create_cgi_dirconf(apr_pool_t *p, char *dummy)
+{
+ cgi_dirconf *c = (cgi_dirconf *) apr_pcalloc(p, sizeof(cgi_dirconf));
+ return c;
+}
+
static const char *set_scriptlog(cmd_parms *cmd, void *dummy, const char *arg)
{
server_rec *s = cmd->server;
@@ -150,6 +162,17 @@ static const char *set_scriptlog_buffer(cmd_parms *cmd, void *dummy,
return NULL;
}
+static const char *set_script_timeout(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ cgi_dirconf *dc = dummy;
+
+ if (ap_timeout_parameter_parse(arg, &dc->timeout, "s") != APR_SUCCESS) {
+ return "CGIScriptTimeout has wrong format";
+ }
+
+ return NULL;
+}
+
static const command_rec cgi_cmds[] =
{
AP_INIT_TAKE1("ScriptLog", set_scriptlog, NULL, RSRC_CONF,
@@ -158,67 +181,12 @@ AP_INIT_TAKE1("ScriptLogLength", set_scriptlog_length, NULL, RSRC_CONF,
"the maximum length (in bytes) of the script debug log"),
AP_INIT_TAKE1("ScriptLogBuffer", set_scriptlog_buffer, NULL, RSRC_CONF,
"the maximum size (in bytes) to record of a POST request"),
+AP_INIT_TAKE1("CGIScriptTimeout", set_script_timeout, NULL, RSRC_CONF | ACCESS_CONF,
+ "The amount of time to wait between successful reads from "
+ "the CGI script, in seconds."),
{NULL}
};
-static int log_scripterror(request_rec *r, cgi_server_conf * conf, int ret,
- apr_status_t rv, char *logno, char *error)
-{
- apr_file_t *f = NULL;
- apr_finfo_t finfo;
- char time_str[APR_CTIME_LEN];
- int log_flags = rv ? APLOG_ERR : APLOG_ERR;
-
- /* Intentional no APLOGNO */
- /* Callee provides APLOGNO in error text */
- ap_log_rerror(APLOG_MARK, log_flags, rv, r,
- "%s%s: %s", logno ? logno : "", error, r->filename);
-
- /* XXX Very expensive mainline case! Open, then getfileinfo! */
- if (!conf->logname ||
- ((apr_stat(&finfo, conf->logname,
- APR_FINFO_SIZE, r->pool) == APR_SUCCESS) &&
- (finfo.size > conf->logbytes)) ||
- (apr_file_open(&f, conf->logname,
- APR_APPEND|APR_WRITE|APR_CREATE, APR_OS_DEFAULT,
- r->pool) != APR_SUCCESS)) {
- return ret;
- }
-
- /* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */
- apr_ctime(time_str, apr_time_now());
- apr_file_printf(f, "%%%% [%s] %s %s%s%s %s\n", time_str, r->method, r->uri,
- r->args ? "?" : "", r->args ? r->args : "", r->protocol);
- /* "%% 500 /usr/local/apache/cgi-bin */
- apr_file_printf(f, "%%%% %d %s\n", ret, r->filename);
-
- apr_file_printf(f, "%%error\n%s\n", error);
-
- apr_file_close(f);
- return ret;
-}
-
-/* Soak up stderr from a script and redirect it to the error log.
- */
-static apr_status_t log_script_err(request_rec *r, apr_file_t *script_err)
-{
- char argsbuffer[HUGE_STRING_LEN];
- char *newline;
- apr_status_t rv;
- cgi_server_conf *conf = ap_get_module_config(r->server->module_config, &cgi_module);
-
- while ((rv = apr_file_gets(argsbuffer, HUGE_STRING_LEN,
- script_err)) == APR_SUCCESS) {
- newline = strchr(argsbuffer, '\n');
- if (newline) {
- *newline = '\0';
- }
- log_scripterror(r, conf, r->status, 0, APLOGNO(01215), argsbuffer);
- }
-
- return rv;
-}
-
static int log_script(request_rec *r, cgi_server_conf * conf, int ret,
char *dbuf, const char *sbuf, apr_bucket_brigade *bb,
apr_file_t *script_err)
@@ -466,23 +434,26 @@ static apr_status_t run_cgi_child(apr_file_t **script_out,
apr_filepath_name_get(r->filename));
}
else {
+ cgi_dirconf *dc = ap_get_module_config(r->per_dir_config, &cgi_module);
+ apr_interval_time_t timeout = dc->timeout > 0 ? dc->timeout : r->server->timeout;
+
apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
*script_in = procnew->out;
if (!*script_in)
return APR_EBADF;
- apr_file_pipe_timeout_set(*script_in, r->server->timeout);
+ apr_file_pipe_timeout_set(*script_in, timeout);
if (e_info->prog_type == RUN_AS_CGI) {
*script_out = procnew->in;
if (!*script_out)
return APR_EBADF;
- apr_file_pipe_timeout_set(*script_out, r->server->timeout);
+ apr_file_pipe_timeout_set(*script_out, timeout);
*script_err = procnew->err;
if (!*script_err)
return APR_EBADF;
- apr_file_pipe_timeout_set(*script_err, r->server->timeout);
+ apr_file_pipe_timeout_set(*script_err, timeout);
}
}
}
@@ -536,234 +507,30 @@ static apr_status_t default_build_command(const char **cmd, const char ***argv,
return APR_SUCCESS;
}
-static void discard_script_output(apr_bucket_brigade *bb)
-{
- apr_bucket *e;
- const char *buf;
- apr_size_t len;
-
- for (e = APR_BRIGADE_FIRST(bb);
- e != APR_BRIGADE_SENTINEL(bb) && !APR_BUCKET_IS_EOS(e);
- e = APR_BRIGADE_FIRST(bb))
- {
- if (apr_bucket_read(e, &buf, &len, APR_BLOCK_READ)) {
- break;
- }
- apr_bucket_delete(e);
- }
-}
-
-#if APR_FILES_AS_SOCKETS
-
-/* A CGI bucket type is needed to catch any output to stderr from the
- * script; see PR 22030. */
-static const apr_bucket_type_t bucket_type_cgi;
-
-struct cgi_bucket_data {
- apr_pollset_t *pollset;
- request_rec *r;
-};
-
-/* Create a CGI bucket using pipes from script stdout 'out'
- * and stderr 'err', for request 'r'. */
-static apr_bucket *cgi_bucket_create(request_rec *r,
- apr_file_t *out, apr_file_t *err,
- apr_bucket_alloc_t *list)
-{
- apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);
- apr_status_t rv;
- apr_pollfd_t fd;
- struct cgi_bucket_data *data = apr_palloc(r->pool, sizeof *data);
-
- APR_BUCKET_INIT(b);
- b->free = apr_bucket_free;
- b->list = list;
- b->type = &bucket_type_cgi;
- b->length = (apr_size_t)(-1);
- b->start = -1;
-
- /* Create the pollset */
- rv = apr_pollset_create(&data->pollset, 2, r->pool, 0);
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01217)
- "apr_pollset_create(); check system or user limits");
- return NULL;
- }
-
- fd.desc_type = APR_POLL_FILE;
- fd.reqevents = APR_POLLIN;
- fd.p = r->pool;
- fd.desc.f = out; /* script's stdout */
- fd.client_data = (void *)1;
- rv = apr_pollset_add(data->pollset, &fd);
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01218)
- "apr_pollset_add(); check system or user limits");
- return NULL;
- }
-
- fd.desc.f = err; /* script's stderr */
- fd.client_data = (void *)2;
- rv = apr_pollset_add(data->pollset, &fd);
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01219)
- "apr_pollset_add(); check system or user limits");
- return NULL;
- }
-
- data->r = r;
- b->data = data;
- return b;
-}
-
-/* Create a duplicate CGI bucket using given bucket data */
-static apr_bucket *cgi_bucket_dup(struct cgi_bucket_data *data,
- apr_bucket_alloc_t *list)
-{
- apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);
- APR_BUCKET_INIT(b);
- b->free = apr_bucket_free;
- b->list = list;
- b->type = &bucket_type_cgi;
- b->length = (apr_size_t)(-1);
- b->start = -1;
- b->data = data;
- return b;
-}
-
-/* Handle stdout from CGI child. Duplicate of logic from the _read
- * method of the real APR pipe bucket implementation. */
-static apr_status_t cgi_read_stdout(apr_bucket *a, apr_file_t *out,
- const char **str, apr_size_t *len)
-{
- char *buf;
- apr_status_t rv;
-
- *str = NULL;
- *len = APR_BUCKET_BUFF_SIZE;
- buf = apr_bucket_alloc(*len, a->list); /* XXX: check for failure? */
-
- rv = apr_file_read(out, buf, len);
-
- if (rv != APR_SUCCESS && rv != APR_EOF) {
- apr_bucket_free(buf);
- return rv;
- }
-
- if (*len > 0) {
- struct cgi_bucket_data *data = a->data;
- apr_bucket_heap *h;
-
- /* Change the current bucket to refer to what we read */
- a = apr_bucket_heap_make(a, buf, *len, apr_bucket_free);
- h = a->data;
- h->alloc_len = APR_BUCKET_BUFF_SIZE; /* note the real buffer size */
- *str = buf;
- APR_BUCKET_INSERT_AFTER(a, cgi_bucket_dup(data, a->list));
- }
- else {
- apr_bucket_free(buf);
- a = apr_bucket_immortal_make(a, "", 0);
- *str = a->data;
- }
- return rv;
-}
-
-/* Read method of CGI bucket: polls on stderr and stdout of the child,
- * sending any stderr output immediately away to the error log. */
-static apr_status_t cgi_bucket_read(apr_bucket *b, const char **str,
- apr_size_t *len, apr_read_type_e block)
-{
- struct cgi_bucket_data *data = b->data;
- apr_interval_time_t timeout;
- apr_status_t rv;
- int gotdata = 0;
-
- timeout = block == APR_NONBLOCK_READ ? 0 : data->r->server->timeout;
-
- do {
- const apr_pollfd_t *results;
- apr_int32_t num;
-
- rv = apr_pollset_poll(data->pollset, timeout, &num, &results);
- if (APR_STATUS_IS_TIMEUP(rv)) {
- if (timeout) {
- ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, data->r, APLOGNO(01220)
- "Timeout waiting for output from CGI script %s",
- data->r->filename);
- return rv;
- }
- else {
- return APR_EAGAIN;
- }
- }
- else if (APR_STATUS_IS_EINTR(rv)) {
- continue;
- }
- else if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, data->r, APLOGNO(01221)
- "poll failed waiting for CGI child");
- return rv;
- }
-
- for (; num; num--, results++) {
- if (results[0].client_data == (void *)1) {
- /* stdout */
- rv = cgi_read_stdout(b, results[0].desc.f, str, len);
- if (APR_STATUS_IS_EOF(rv)) {
- rv = APR_SUCCESS;
- }
- gotdata = 1;
- } else {
- /* stderr */
- apr_status_t rv2 = log_script_err(data->r, results[0].desc.f);
- if (APR_STATUS_IS_EOF(rv2)) {
- apr_pollset_remove(data->pollset, &results[0]);
- }
- }
- }
-
- } while (!gotdata);
-
- return rv;
-}
-
-static const apr_bucket_type_t bucket_type_cgi = {
- "CGI", 5, APR_BUCKET_DATA,
- apr_bucket_destroy_noop,
- cgi_bucket_read,
- apr_bucket_setaside_notimpl,
- apr_bucket_split_notimpl,
- apr_bucket_copy_notimpl
-};
-
-#endif
-
static int cgi_handler(request_rec *r)
{
int nph;
- apr_size_t dbpos = 0;
+ apr_size_t dbufsize;
const char *argv0;
const char *command;
const char **argv;
char *dbuf = NULL;
apr_file_t *script_out = NULL, *script_in = NULL, *script_err = NULL;
- apr_bucket_brigade *bb;
+ conn_rec *c = r->connection;
+ apr_bucket_brigade *bb = apr_brigade_create(r->pool, c->bucket_alloc);
apr_bucket *b;
int is_included;
- int seen_eos, child_stopped_reading;
apr_pool_t *p;
cgi_server_conf *conf;
apr_status_t rv;
cgi_exec_info_t e_info;
- conn_rec *c;
+ cgi_dirconf *dc = ap_get_module_config(r->per_dir_config, &cgi_module);
+ apr_interval_time_t timeout = dc->timeout > 0 ? dc->timeout : r->server->timeout;
if (strcmp(r->handler, CGI_MAGIC_TYPE) && strcmp(r->handler, "cgi-script")) {
return DECLINED;
}
- c = r->connection;
-
is_included = !strcmp(r->protocol, "INCLUDED");
p = r->main ? r->main->pool : r->pool;
@@ -832,83 +599,24 @@ static int cgi_handler(request_rec *r)
return HTTP_INTERNAL_SERVER_ERROR;
}
- /* Transfer any put/post args, CERN style...
- * Note that we already ignore SIGPIPE in the core server.
- */
- bb = apr_brigade_create(r->pool, c->bucket_alloc);
- seen_eos = 0;
- child_stopped_reading = 0;
+ /* Buffer for logging script stdout. */
if (conf->logname) {
- dbuf = apr_palloc(r->pool, conf->bufbytes + 1);
- dbpos = 0;
+ dbufsize = conf->bufbytes;
+ dbuf = apr_palloc(r->pool, dbufsize + 1);
}
- do {
- apr_bucket *bucket;
-
- rv = ap_get_brigade(r->input_filters, bb, AP_MODE_READBYTES,
- APR_BLOCK_READ, HUGE_STRING_LEN);
-
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01225)
- "Error reading request entity data");
- return ap_map_http_request_error(rv, HTTP_BAD_REQUEST);
- }
-
- for (bucket = APR_BRIGADE_FIRST(bb);
- bucket != APR_BRIGADE_SENTINEL(bb);
- bucket = APR_BUCKET_NEXT(bucket))
- {
- const char *data;
- apr_size_t len;
-
- if (APR_BUCKET_IS_EOS(bucket)) {
- seen_eos = 1;
- break;
- }
-
- /* We can't do much with this. */
- if (APR_BUCKET_IS_FLUSH(bucket)) {
- continue;
- }
-
- /* If the child stopped, we still must read to EOS. */
- if (child_stopped_reading) {
- continue;
- }
-
- /* read */
- apr_bucket_read(bucket, &data, &len, APR_BLOCK_READ);
-
- if (conf->logname && dbpos < conf->bufbytes) {
- int cursize;
-
- if ((dbpos + len) > conf->bufbytes) {
- cursize = conf->bufbytes - dbpos;
- }
- else {
- cursize = len;
- }
- memcpy(dbuf + dbpos, data, cursize);
- dbpos += cursize;
- }
-
- /* Keep writing data to the child until done or too much time
- * elapses with no progress or an error occurs.
- */
- rv = apr_file_write_full(script_out, data, len, NULL);
-
- if (rv != APR_SUCCESS) {
- /* silly script stopped reading, soak up remaining message */
- child_stopped_reading = 1;
- }
- }
- apr_brigade_cleanup(bb);
+ else {
+ dbufsize = 0;
+ dbuf = NULL;
}
- while (!seen_eos);
- if (conf->logname) {
- dbuf[dbpos] = '\0';
+ /* Read the request body. */
+ rv = cgi_handle_request(r, script_out, bb, dbuf, dbufsize);
+ if (rv) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01225)
+ "Error reading request entity data");
+ return ap_map_http_request_error(rv, HTTP_BAD_REQUEST);
}
+
/* Is this flush really needed? */
apr_file_flush(script_out);
apr_file_close(script_out);
@@ -916,10 +624,7 @@ static int cgi_handler(request_rec *r)
AP_DEBUG_ASSERT(script_in != NULL);
#if APR_FILES_AS_SOCKETS
- apr_file_pipe_timeout_set(script_in, 0);
- apr_file_pipe_timeout_set(script_err, 0);
-
- b = cgi_bucket_create(r, script_in, script_err, c->bucket_alloc);
+ b = cgi_bucket_create(r, dc->timeout, script_in, script_err, c->bucket_alloc);
if (b == NULL)
return HTTP_INTERNAL_SERVER_ERROR;
#else
@@ -929,111 +634,7 @@ static int cgi_handler(request_rec *r)
b = apr_bucket_eos_create(c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
- /* Handle script return... */
- if (!nph) {
- const char *location;
- char sbuf[MAX_STRING_LEN];
- int ret;
-
- if ((ret = ap_scan_script_header_err_brigade_ex(r, bb, sbuf,
- APLOG_MODULE_INDEX)))
- {
- ret = log_script(r, conf, ret, dbuf, sbuf, bb, script_err);
-
- /*
- * ret could be HTTP_NOT_MODIFIED in the case that the CGI script
- * does not set an explicit status and ap_meets_conditions, which
- * is called by ap_scan_script_header_err_brigade, detects that
- * the conditions of the requests are met and the response is
- * not modified.
- * In this case set r->status and return OK in order to prevent
- * running through the error processing stack as this would
- * break with mod_cache, if the conditions had been set by
- * mod_cache itself to validate a stale entity.
- * BTW: We circumvent the error processing stack anyway if the
- * CGI script set an explicit status code (whatever it is) and
- * the only possible values for ret here are:
- *
- * HTTP_NOT_MODIFIED (set by ap_meets_conditions)
- * HTTP_PRECONDITION_FAILED (set by ap_meets_conditions)
- * HTTP_INTERNAL_SERVER_ERROR (if something went wrong during the
- * processing of the response of the CGI script, e.g broken headers
- * or a crashed CGI process).
- */
- if (ret == HTTP_NOT_MODIFIED) {
- r->status = ret;
- return OK;
- }
-
- return ret;
- }
-
- location = apr_table_get(r->headers_out, "Location");
-
- if (location && r->status == 200) {
- /* For a redirect whether internal or not, discard any
- * remaining stdout from the script, and log any remaining
- * stderr output, as normal. */
- discard_script_output(bb);
- apr_brigade_destroy(bb);
- apr_file_pipe_timeout_set(script_err, r->server->timeout);
- log_script_err(r, script_err);
- }
-
- if (location && location[0] == '/' && r->status == 200) {
- /* This redirect needs to be a GET no matter what the original
- * method was.
- */
- r->method = "GET";
- r->method_number = M_GET;
-
- /* We already read the message body (if any), so don't allow
- * the redirected request to think it has one. We can ignore
- * Transfer-Encoding, since we used REQUEST_CHUNKED_ERROR.
- */
- apr_table_unset(r->headers_in, "Content-Length");
-
- ap_internal_redirect_handler(location, r);
- return OK;
- }
- else if (location && r->status == 200) {
- /* XXX: Note that if a script wants to produce its own Redirect
- * body, it now has to explicitly *say* "Status: 302"
- */
- return HTTP_MOVED_TEMPORARILY;
- }
-
- rv = ap_pass_brigade(r->output_filters, bb);
- }
- else /* nph */ {
- struct ap_filter_t *cur;
-
- /* get rid of all filters up through protocol... since we
- * haven't parsed off the headers, there is no way they can
- * work
- */
-
- cur = r->proto_output_filters;
- while (cur && cur->frec->ftype < AP_FTYPE_CONNECTION) {
- cur = cur->next;
- }
- r->output_filters = r->proto_output_filters = cur;
-
- rv = ap_pass_brigade(r->output_filters, bb);
- }
-
- /* don't soak up script output if errors occurred writing it
- * out... otherwise, we prolong the life of the script when the
- * connection drops or we stopped sending output for some other
- * reason */
- if (rv == APR_SUCCESS && !r->connection->aborted) {
- apr_file_pipe_timeout_set(script_err, r->server->timeout);
- log_script_err(r, script_err);
- }
-
- apr_file_close(script_err);
-
- return OK; /* NOT r->status, even if it has changed. */
+ return cgi_handle_response(r, nph, bb, timeout, conf, dbuf, script_err);
}
/*============================================================================
@@ -1147,107 +748,9 @@ static apr_status_t include_cmd(include_ctx_t *ctx, ap_filter_t *f,
return APR_SUCCESS;
}
-static apr_status_t handle_exec(include_ctx_t *ctx, ap_filter_t *f,
- apr_bucket_brigade *bb)
-{
- char *tag = NULL;
- char *tag_val = NULL;
- request_rec *r = f->r;
- char *file = r->filename;
- char parsed_string[MAX_STRING_LEN];
-
- if (!ctx->argc) {
- ap_log_rerror(APLOG_MARK,
- (ctx->flags & SSI_FLAG_PRINTING)
- ? APLOG_ERR : APLOG_WARNING,
- 0, r, APLOGNO(03195)
- "missing argument for exec element in %s", r->filename);
- }
-
- if (!(ctx->flags & SSI_FLAG_PRINTING)) {
- return APR_SUCCESS;
- }
-
- if (!ctx->argc) {
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- return APR_SUCCESS;
- }
-
- if (ctx->flags & SSI_FLAG_NO_EXEC) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01228) "exec used but not allowed "
- "in %s", r->filename);
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- return APR_SUCCESS;
- }
-
- while (1) {
- cgi_pfn_gtv(ctx, &tag, &tag_val, SSI_VALUE_DECODED);
- if (!tag || !tag_val) {
- break;
- }
-
- if (!strcmp(tag, "cmd")) {
- apr_status_t rv;
-
- cgi_pfn_ps(ctx, tag_val, parsed_string, sizeof(parsed_string),
- SSI_EXPAND_LEAVE_NAME);
-
- rv = include_cmd(ctx, f, bb, parsed_string);
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01229) "execution failure "
- "for parameter \"%s\" to tag exec in file %s",
- tag, r->filename);
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- break;
- }
- }
- else if (!strcmp(tag, "cgi")) {
- apr_status_t rv;
-
- cgi_pfn_ps(ctx, tag_val, parsed_string, sizeof(parsed_string),
- SSI_EXPAND_DROP_NAME);
-
- rv = include_cgi(ctx, f, bb, parsed_string);
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01230) "invalid CGI ref "
- "\"%s\" in %s", tag_val, file);
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- break;
- }
- }
- else {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01231) "unknown parameter "
- "\"%s\" to tag exec in %s", tag, file);
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- break;
- }
- }
-
- return APR_SUCCESS;
-}
-
-
-/*============================================================================
- *============================================================================
- * This is the end of the cgi filter code moved from mod_include.
- *============================================================================
- *============================================================================*/
-
-
static int cgi_post_config(apr_pool_t *p, apr_pool_t *plog,
apr_pool_t *ptemp, server_rec *s)
{
- cgi_pfn_reg_with_ssi = APR_RETRIEVE_OPTIONAL_FN(ap_register_include_handler);
- cgi_pfn_gtv = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_get_tag_and_value);
- cgi_pfn_ps = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_parse_string);
-
- if ((cgi_pfn_reg_with_ssi) && (cgi_pfn_gtv) && (cgi_pfn_ps)) {
- /* Required by mod_include filter. This is how mod_cgi registers
- * with mod_include to provide processing of the exec directive.
- */
- cgi_pfn_reg_with_ssi("exec", handle_exec);
- }
-
/* This is the means by which unusual (non-unix) os's may find alternate
* means to run a given command (e.g. shebang/registry parsing on Win32)
*/
@@ -1263,12 +766,13 @@ static void register_hooks(apr_pool_t *p)
static const char * const aszPre[] = { "mod_include.c", NULL };
ap_hook_handler(cgi_handler, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_post_config(cgi_post_config, aszPre, NULL, APR_HOOK_REALLY_FIRST);
+ ap_hook_optional_fn_retrieve(cgi_optfns_retrieve, NULL, NULL, APR_HOOK_MIDDLE);
}
AP_DECLARE_MODULE(cgi) =
{
STANDARD20_MODULE_STUFF,
- NULL, /* dir config creater */
+ create_cgi_dirconf, /* dir config creater */
NULL, /* dir merger --- default is to override */
create_cgi_config, /* server config */
merge_cgi_config, /* merge server config */
diff --git a/modules/generators/mod_cgid.c b/modules/generators/mod_cgid.c
index 2258a683b7..dddfb25254 100644
--- a/modules/generators/mod_cgid.c
+++ b/modules/generators/mod_cgid.c
@@ -80,11 +80,6 @@ module AP_MODULE_DECLARE_DATA cgid_module;
static int cgid_start(apr_pool_t *p, server_rec *main_server, apr_proc_t *procnew);
static int cgid_init(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *main_server);
-static int handle_exec(include_ctx_t *ctx, ap_filter_t *f, apr_bucket_brigade *bb);
-
-static APR_OPTIONAL_FN_TYPE(ap_register_include_handler) *cgid_pfn_reg_with_ssi;
-static APR_OPTIONAL_FN_TYPE(ap_ssi_get_tag_and_value) *cgid_pfn_gtv;
-static APR_OPTIONAL_FN_TYPE(ap_ssi_parse_string) *cgid_pfn_ps;
static apr_pool_t *pcgi = NULL;
static pid_t daemon_pid;
@@ -220,6 +215,15 @@ typedef struct {
#endif
} cgid_req_t;
+#define cgi_server_conf cgid_server_conf
+#define cgi_module cgid_module
+
+#ifdef HAVE_CGID_FDPASSING
+/* Pull in CGI bucket implementation. */
+#define WANT_CGI_BUCKET
+#endif
+#include "cgi_common.h"
+
/* This routine is called to create the argument list to be passed
* to the CGI script. When suexec is enabled, the suexec path, user, and
* group are the first three arguments to be passed; if not, all three
@@ -342,15 +346,19 @@ static apr_status_t close_unix_socket(void *thefd)
return close(fd);
}
-/* deal with incomplete reads and signals
- * assume you really have to read buf_size bytes
- */
-static apr_status_t sock_read(int fd, void *vbuf, size_t buf_size)
+/* Read from the socket dealing with incomplete messages and signals.
+ * Returns 0 on success or errno on failure. Stderr fd passed as
+ * auxiliary data from other end is written to *errfd, or else stderr
+ * fileno if not present. */
+static apr_status_t sock_readhdr(int fd, int *errfd, void *vbuf, size_t buf_size)
{
- char *buf = vbuf;
int rc;
+#ifndef HAVE_CGID_FDPASSING
+ char *buf = vbuf;
size_t bytes_read = 0;
+ if (errfd) *errfd = 0;
+
do {
do {
rc = read(fd, buf + bytes_read, buf_size - bytes_read);
@@ -365,9 +373,60 @@ static apr_status_t sock_read(int fd, void *vbuf, size_t buf_size)
}
} while (bytes_read < buf_size);
+
+#else /* with FD passing */
+ struct msghdr msg = {0};
+ struct iovec vec = {vbuf, buf_size};
+ struct cmsghdr *cmsg;
+ union { /* union to ensure alignment */
+ struct cmsghdr cm;
+ char buf[CMSG_SPACE(sizeof(int))];
+ } u;
+
+ msg.msg_iov = &vec;
+ msg.msg_iovlen = 1;
+
+ if (errfd) {
+ msg.msg_control = u.buf;
+ msg.msg_controllen = sizeof(u.buf);
+ *errfd = 0;
+ }
+
+ /* use MSG_WAITALL to skip loop on truncated reads */
+ do {
+ rc = recvmsg(fd, &msg, MSG_WAITALL);
+ } while (rc < 0 && errno == EINTR);
+
+ if (rc == 0) {
+ return ECONNRESET;
+ }
+ else if (rc < 0) {
+ return errno;
+ }
+ else if (rc != buf_size) {
+ /* MSG_WAITALL should ensure the recvmsg blocks until the
+ * entire length is read, but let's be paranoid. */
+ return APR_INCOMPLETE;
+ }
+
+ if (errfd
+ && (cmsg = CMSG_FIRSTHDR(&msg)) != NULL
+ && cmsg->cmsg_len == CMSG_LEN(sizeof(*errfd))
+ && cmsg->cmsg_level == SOL_SOCKET
+ && cmsg->cmsg_type == SCM_RIGHTS) {
+ *errfd = *((int *) CMSG_DATA(cmsg));
+ }
+#endif
+
return APR_SUCCESS;
}
+/* As sock_readhdr but without auxiliary fd passing. */
+static apr_status_t sock_read(int fd, void *vbuf, size_t buf_size)
+{
+ return sock_readhdr(fd, NULL, vbuf, buf_size);
+}
+
/* deal with signals
*/
static apr_status_t sock_write(int fd, const void *buf, size_t buf_size)
@@ -384,7 +443,7 @@ static apr_status_t sock_write(int fd, const void *buf, size_t buf_size)
return APR_SUCCESS;
}
-static apr_status_t sock_writev(int fd, request_rec *r, int count, ...)
+static apr_status_t sock_writev(int fd, int auxfd, request_rec *r, int count, ...)
{
va_list ap;
int rc;
@@ -399,9 +458,39 @@ static apr_status_t sock_writev(int fd, request_rec *r, int count, ...)
}
va_end(ap);
+#ifndef HAVE_CGID_FDPASSING
do {
rc = writev(fd, vec, count);
} while (rc < 0 && errno == EINTR);
+#else
+ {
+ struct msghdr msg = { 0 };
+ struct cmsghdr *cmsg;
+ union { /* union for alignment */
+ char buf[CMSG_SPACE(sizeof(int))];
+ struct cmsghdr align;
+ } u;
+
+ msg.msg_iov = vec;
+ msg.msg_iovlen = count;
+
+ if (auxfd) {
+ msg.msg_control = u.buf;
+ msg.msg_controllen = sizeof(u.buf);
+
+ cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(int));
+ *((int *) CMSG_DATA(cmsg)) = auxfd;
+ }
+
+ do {
+ rc = sendmsg(fd, &msg, 0);
+ } while (rc < 0 && errno == EINTR);
+ }
+#endif
+
if (rc < 0) {
return errno;
}
@@ -410,7 +499,7 @@ static apr_status_t sock_writev(int fd, request_rec *r, int count, ...)
}
static apr_status_t get_req(int fd, request_rec *r, char **argv0, char ***env,
- cgid_req_t *req)
+ int *errfd, cgid_req_t *req)
{
int i;
char **environ;
@@ -421,7 +510,7 @@ static apr_status_t get_req(int fd, request_rec *r, char **argv0, char ***env,
r->server = apr_pcalloc(r->pool, sizeof(server_rec));
/* read the request header */
- stat = sock_read(fd, req, sizeof(*req));
+ stat = sock_readhdr(fd, errfd, req, sizeof(*req));
if (stat != APR_SUCCESS) {
return stat;
}
@@ -431,6 +520,14 @@ static apr_status_t get_req(int fd, request_rec *r, char **argv0, char ***env,
return APR_SUCCESS;
}
+ /* Sanity check the structure received. */
+ if (req->env_count < 0 || req->uri_len == 0
+ || req->filename_len > APR_PATH_MAX || req->filename_len == 0
+ || req->argv0_len > APR_PATH_MAX || req->argv0_len == 0
+ || req->loglevel > APLOG_TRACE8) {
+ return APR_EINVAL;
+ }
+
/* handle module indexes and such */
rconf = (void **)ap_create_request_config(r->pool);
@@ -479,14 +576,15 @@ static apr_status_t get_req(int fd, request_rec *r, char **argv0, char ***env,
return APR_SUCCESS;
}
-static apr_status_t send_req(int fd, request_rec *r, char *argv0, char **env,
- int req_type)
+static apr_status_t send_req(int fd, apr_file_t *errpipe, request_rec *r,
+ const char *argv0, char **env, int req_type)
{
int i;
cgid_req_t req = {0};
apr_status_t stat;
ap_unix_identity_t * ugid = ap_run_get_suexec_identity(r);
core_dir_config *core_conf = ap_get_core_module_config(r->per_dir_config);
+ int errfd;
if (ugid == NULL) {
@@ -507,16 +605,21 @@ static apr_status_t send_req(int fd, request_rec *r, char *argv0, char **env,
req.args_len = r->args ? strlen(r->args) : 0;
req.loglevel = r->server->log.level;
+ if (errpipe)
+ apr_os_file_get(&errfd, errpipe);
+ else
+ errfd = 0;
+
/* Write the request header */
if (req.args_len) {
- stat = sock_writev(fd, r, 5,
+ stat = sock_writev(fd, errfd, r, 5,
&req, sizeof(req),
r->filename, req.filename_len,
argv0, req.argv0_len,
r->uri, req.uri_len,
r->args, req.args_len);
} else {
- stat = sock_writev(fd, r, 4,
+ stat = sock_writev(fd, errfd, r, 4,
&req, sizeof(req),
r->filename, req.filename_len,
argv0, req.argv0_len,
@@ -531,7 +634,7 @@ static apr_status_t send_req(int fd, request_rec *r, char *argv0, char **env,
for (i = 0; i < req.env_count; i++) {
apr_size_t curlen = strlen(env[i]);
- if ((stat = sock_writev(fd, r, 2, &curlen, sizeof(curlen),
+ if ((stat = sock_writev(fd, 0, r, 2, &curlen, sizeof(curlen),
env[i], curlen)) != APR_SUCCESS) {
return stat;
}
@@ -582,20 +685,34 @@ static void daemon_signal_handler(int sig)
}
}
+/* Callback executed in the forked child process if exec of the CGI
+ * script fails. For the fd-passing case, output to stderr goes to
+ * the client (request handling thread) and is logged via
+ * ap_log_rerror there. For the non-fd-passing case, the "fake"
+ * request_rec passed via userdata is used to log. */
static void cgid_child_errfn(apr_pool_t *pool, apr_status_t err,
const char *description)
{
- request_rec *r;
void *vr;
apr_pool_userdata_get(&vr, ERRFN_USERDATA_KEY, pool);
- r = vr;
-
- /* sure we got r, but don't call ap_log_rerror() because we don't
- * have r->headers_in and possibly other storage referenced by
- * ap_log_rerror()
- */
- ap_log_error(APLOG_MARK, APLOG_ERR, err, r->server, APLOGNO(01241) "%s", description);
+ if (vr) {
+ request_rec *r = vr;
+
+ /* sure we got r, but don't call ap_log_rerror() because we don't
+ * have r->headers_in and possibly other storage referenced by
+ * ap_log_rerror()
+ */
+ ap_log_error(APLOG_MARK, APLOG_ERR, err, r->server, APLOGNO(01241) "%s", description);
+ }
+ else {
+ const char *logstr;
+
+ logstr = apr_psprintf(pool, APLOGNO(01241) "error spawning CGI child: %s (%pm)\n",
+ description, &err);
+ fputs(logstr, stderr);
+ fflush(stderr);
+ }
}
static int cgid_server(void *data)
@@ -670,7 +787,7 @@ static int cgid_server(void *data)
}
while (!daemon_should_exit) {
- int errfileno = STDERR_FILENO;
+ int errfileno;
char *argv0 = NULL;
char **env = NULL;
const char * const *argv;
@@ -710,7 +827,7 @@ static int cgid_server(void *data)
r = apr_pcalloc(ptrans, sizeof(request_rec));
procnew = apr_pcalloc(ptrans, sizeof(*procnew));
r->pool = ptrans;
- stat = get_req(sd2, r, &argv0, &env, &cgid_req);
+ stat = get_req(sd2, r, &argv0, &env, &errfileno, &cgid_req);
if (stat != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, stat,
main_server, APLOGNO(01248)
@@ -742,6 +859,16 @@ static int cgid_server(void *data)
continue;
}
+ if (errfileno == 0) {
+ errfileno = STDERR_FILENO;
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, main_server,
+ "using passed fd %d as stderr", errfileno);
+ /* Limit the received fd lifetime to pool lifetime */
+ apr_pool_cleanup_register(ptrans, (void *)((long)errfileno),
+ close_unix_socket, close_unix_socket);
+ }
apr_os_file_put(&r->server->error_log, &errfileno, 0, r->pool);
apr_os_file_put(&inout, &sd2, 0, r->pool);
@@ -801,7 +928,10 @@ static int cgid_server(void *data)
close(sd2);
}
else {
- apr_pool_userdata_set(r, ERRFN_USERDATA_KEY, apr_pool_cleanup_null, ptrans);
+ if (errfileno == STDERR_FILENO) {
+ /* Used by cgid_child_errfn without fd-passing. */
+ apr_pool_userdata_set(r, ERRFN_USERDATA_KEY, apr_pool_cleanup_null, ptrans);
+ }
argv = (const char * const *)create_argv(r->pool, NULL, NULL, NULL, argv0, r->args);
@@ -946,16 +1076,6 @@ static int cgid_init(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp,
if (ret != OK ) {
return ret;
}
- cgid_pfn_reg_with_ssi = APR_RETRIEVE_OPTIONAL_FN(ap_register_include_handler);
- cgid_pfn_gtv = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_get_tag_and_value);
- cgid_pfn_ps = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_parse_string);
-
- if ((cgid_pfn_reg_with_ssi) && (cgid_pfn_gtv) && (cgid_pfn_ps)) {
- /* Required by mod_include filter. This is how mod_cgid registers
- * with mod_include to provide processing of the exec directive.
- */
- cgid_pfn_reg_with_ssi("exec", handle_exec);
- }
}
return ret;
}
@@ -1066,41 +1186,6 @@ static const command_rec cgid_cmds[] =
{NULL}
};
-static int log_scripterror(request_rec *r, cgid_server_conf * conf, int ret,
- apr_status_t rv, char *error)
-{
- apr_file_t *f = NULL;
- struct stat finfo;
- char time_str[APR_CTIME_LEN];
- int log_flags = rv ? APLOG_ERR : APLOG_ERR;
-
- /* Intentional no APLOGNO */
- /* Callee provides APLOGNO in error text */
- ap_log_rerror(APLOG_MARK, log_flags, rv, r,
- "%s: %s", error, r->filename);
-
- /* XXX Very expensive mainline case! Open, then getfileinfo! */
- if (!conf->logname ||
- ((stat(conf->logname, &finfo) == 0)
- && (finfo.st_size > conf->logbytes)) ||
- (apr_file_open(&f, conf->logname,
- APR_APPEND|APR_WRITE|APR_CREATE, APR_OS_DEFAULT, r->pool) != APR_SUCCESS)) {
- return ret;
- }
-
- /* "%% [Wed Jun 19 10:53:21 1996] GET /cgid-bin/printenv HTTP/1.0" */
- apr_ctime(time_str, apr_time_now());
- apr_file_printf(f, "%%%% [%s] %s %s%s%s %s\n", time_str, r->method, r->uri,
- r->args ? "?" : "", r->args ? r->args : "", r->protocol);
- /* "%% 500 /usr/local/apache/cgid-bin */
- apr_file_printf(f, "%%%% %d %s\n", ret, r->filename);
-
- apr_file_printf(f, "%%error\n%s\n", error);
-
- apr_file_close(f);
- return ret;
-}
-
static int log_script(request_rec *r, cgid_server_conf * conf, int ret,
char *dbuf, const char *sbuf, apr_bucket_brigade *bb,
apr_file_t *script_err)
@@ -1221,7 +1306,7 @@ static int connect_to_daemon(int *sdptr, request_rec *r,
++connect_tries;
if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
return log_scripterror(r, conf, HTTP_INTERNAL_SERVER_ERROR, errno,
- APLOGNO(01255) "unable to create socket to cgi daemon");
+ APLOGNO(01255), "unable to create socket to cgi daemon");
}
if (connect(sd, (struct sockaddr *)server_addr, server_addr_len) < 0) {
/* Save errno for later */
@@ -1242,7 +1327,7 @@ static int connect_to_daemon(int *sdptr, request_rec *r,
}
else {
close(sd);
- return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, errno, APLOGNO(01257)
+ return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, errno, APLOGNO(01257),
"unable to connect to cgi daemon after multiple tries");
}
}
@@ -1258,13 +1343,15 @@ static int connect_to_daemon(int *sdptr, request_rec *r,
if (connect_errno == ENOENT &&
apr_time_sec(apr_time_now() - ap_scoreboard_image->global->restart_time) >
DEFAULT_CONNECT_STARTUP_DELAY) {
- return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno,
- apr_pstrcat(r->pool, APLOGNO(02833) "ScriptSock ", sockname, " does not exist", NULL));
+ return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno,
+ APLOGNO(02833),
+ apr_pstrcat(r->pool,
+ "ScriptSock ", sockname, " does not exist", NULL));
}
/* gotta try again, but make sure the cgid daemon is still around */
if (connect_errno != ENOENT && kill(daemon_pid, 0) != 0) {
- return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno, APLOGNO(01258)
+ return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno, APLOGNO(01258),
"cgid daemon is gone; is Apache terminating?");
}
}
@@ -1272,23 +1359,6 @@ static int connect_to_daemon(int *sdptr, request_rec *r,
return OK;
}
-static void discard_script_output(apr_bucket_brigade *bb)
-{
- apr_bucket *e;
- const char *buf;
- apr_size_t len;
-
- for (e = APR_BRIGADE_FIRST(bb);
- e != APR_BRIGADE_SENTINEL(bb) && !APR_BUCKET_IS_EOS(e);
- e = APR_BRIGADE_FIRST(bb))
- {
- if (apr_bucket_read(e, &buf, &len, APR_BLOCK_READ)) {
- break;
- }
- apr_bucket_delete(e);
- }
-}
-
/****************************************************************
*
* Actual cgid handling...
@@ -1374,7 +1444,9 @@ static apr_status_t get_cgi_pid(request_rec *r, cgid_server_conf *conf, pid_t *
return stat;
}
- if (pid == 0) {
+ /* Don't accept zero as a pid here, calling kill(0, SIGTERM) etc
+ * later is unpleasant. */
+ if (*pid == 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01261)
"daemon couldn't find CGI process for connection %lu",
r->connection->id);
@@ -1393,19 +1465,21 @@ static apr_status_t cleanup_script(void *vptr)
static int cgid_handler(request_rec *r)
{
- int retval, nph, dbpos;
+ conn_rec *c = r->connection;
+ int retval, nph;
char *argv0, *dbuf;
- apr_bucket_brigade *bb;
+ apr_size_t dbufsize;
+ apr_bucket_brigade *bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
apr_bucket *b;
cgid_server_conf *conf;
int is_included;
- int seen_eos, child_stopped_reading;
int sd;
char **env;
- apr_file_t *tempsock;
+ apr_file_t *tempsock, *script_err, *errpipe_out;
struct cleanup_script_info *info;
apr_status_t rv;
cgid_dirconf *dc;
+ apr_interval_time_t timeout;
if (strcmp(r->handler, CGI_MAGIC_TYPE) && strcmp(r->handler, "cgi-script")) {
return DECLINED;
@@ -1414,7 +1488,7 @@ static int cgid_handler(request_rec *r)
conf = ap_get_module_config(r->server->module_config, &cgid_module);
dc = ap_get_module_config(r->per_dir_config, &cgid_module);
-
+ timeout = dc->timeout > 0 ? dc->timeout : r->server->timeout;
is_included = !strcmp(r->protocol, "INCLUDED");
if ((argv0 = strrchr(r->filename, '/')) != NULL) {
@@ -1429,12 +1503,12 @@ static int cgid_handler(request_rec *r)
argv0 = r->filename;
if (!(ap_allow_options(r) & OPT_EXECCGI) && !is_scriptaliased(r)) {
- return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, APLOGNO(01262)
+ return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, APLOGNO(01262),
"Options ExecCGI is off in this directory");
}
if (nph && is_included) {
- return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, APLOGNO(01263)
+ return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, APLOGNO(01263),
"attempt to include NPH CGI script");
}
@@ -1443,12 +1517,12 @@ static int cgid_handler(request_rec *r)
#error at mod_cgi.c for required code in this path.
#else
if (r->finfo.filetype == APR_NOFILE) {
- return log_scripterror(r, conf, HTTP_NOT_FOUND, 0, APLOGNO(01264)
+ return log_scripterror(r, conf, HTTP_NOT_FOUND, 0, APLOGNO(01264),
"script not found or unable to stat");
}
#endif
if (r->finfo.filetype == APR_DIR) {
- return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, APLOGNO(01265)
+ return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, APLOGNO(01265),
"attempt to invoke directory as script");
}
@@ -1456,7 +1530,7 @@ static int cgid_handler(request_rec *r)
r->path_info && *r->path_info)
{
/* default to accept */
- return log_scripterror(r, conf, HTTP_NOT_FOUND, 0, APLOGNO(01266)
+ return log_scripterror(r, conf, HTTP_NOT_FOUND, 0, APLOGNO(01266),
"AcceptPathInfo off disallows user's path");
}
/*
@@ -1467,6 +1541,17 @@ static int cgid_handler(request_rec *r)
}
*/
+#ifdef HAVE_CGID_FDPASSING
+ rv = apr_file_pipe_create(&script_err, &errpipe_out, r->pool);
+ if (rv) {
+ return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, rv, APLOGNO(10176),
+ "could not create pipe for stderr");
+ }
+#else
+ script_err = NULL;
+ errpipe_out = NULL;
+#endif
+
/*
* httpd core function used to add common environment variables like
* DOCUMENT_ROOT.
@@ -1479,24 +1564,28 @@ static int cgid_handler(request_rec *r)
return retval;
}
- rv = send_req(sd, r, argv0, env, CGI_REQ);
+ rv = send_req(sd, errpipe_out, r, argv0, env, CGI_REQ);
if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01268)
- "write to cgi daemon process");
+ return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, rv, APLOGNO(10245),
+ "could not send request to cgi daemon");
}
+ /* The write-end of the pipe is only used by the server, so close
+ * it here. */
+ if (errpipe_out) apr_file_close(errpipe_out);
+
info = apr_palloc(r->pool, sizeof(struct cleanup_script_info));
info->conf = conf;
info->r = r;
rv = get_cgi_pid(r, conf, &(info->pid));
- if (APR_SUCCESS == rv){
+ if (rv == APR_SUCCESS) {
apr_pool_cleanup_register(r->pool, info,
- cleanup_script,
- apr_pool_cleanup_null);
+ cleanup_script, apr_pool_cleanup_null);
}
else {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, "error determining cgi PID");
+ return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, rv, APLOGNO(10246),
+ "failed reading PID from cgi daemon");
}
/* We are putting the socket discriptor into an apr_file_t so that we can
@@ -1506,95 +1595,25 @@ static int cgid_handler(request_rec *r)
*/
apr_os_pipe_put_ex(&tempsock, &sd, 1, r->pool);
- if (dc->timeout > 0) {
- apr_file_pipe_timeout_set(tempsock, dc->timeout);
- }
- else {
- apr_file_pipe_timeout_set(tempsock, r->server->timeout);
- }
+ apr_file_pipe_timeout_set(tempsock, timeout);
apr_pool_cleanup_kill(r->pool, (void *)((long)sd), close_unix_socket);
- /* Transfer any put/post args, CERN style...
- * Note that we already ignore SIGPIPE in the core server.
- */
- bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
- seen_eos = 0;
- child_stopped_reading = 0;
- dbuf = NULL;
- dbpos = 0;
+ /* Buffer for logging script stdout. */
if (conf->logname) {
- dbuf = apr_palloc(r->pool, conf->bufbytes + 1);
+ dbufsize = conf->bufbytes;
+ dbuf = apr_palloc(r->pool, dbufsize + 1);
}
- do {
- apr_bucket *bucket;
-
- rv = ap_get_brigade(r->input_filters, bb, AP_MODE_READBYTES,
- APR_BLOCK_READ, HUGE_STRING_LEN);
-
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01270)
- "Error reading request entity data");
- return ap_map_http_request_error(rv, HTTP_BAD_REQUEST);
- }
-
- for (bucket = APR_BRIGADE_FIRST(bb);
- bucket != APR_BRIGADE_SENTINEL(bb);
- bucket = APR_BUCKET_NEXT(bucket))
- {
- const char *data;
- apr_size_t len;
-
- if (APR_BUCKET_IS_EOS(bucket)) {
- seen_eos = 1;
- break;
- }
-
- /* We can't do much with this. */
- if (APR_BUCKET_IS_FLUSH(bucket)) {
- continue;
- }
-
- /* If the child stopped, we still must read to EOS. */
- if (child_stopped_reading) {
- continue;
- }
-
- /* read */
- apr_bucket_read(bucket, &data, &len, APR_BLOCK_READ);
-
- if (conf->logname && dbpos < conf->bufbytes) {
- int cursize;
-
- if ((dbpos + len) > conf->bufbytes) {
- cursize = conf->bufbytes - dbpos;
- }
- else {
- cursize = len;
- }
- memcpy(dbuf + dbpos, data, cursize);
- dbpos += cursize;
- }
-
- /* Keep writing data to the child until done or too much time
- * elapses with no progress or an error occurs.
- */
- rv = apr_file_write_full(tempsock, data, len, NULL);
-
- if (rv != APR_SUCCESS) {
- /* silly script stopped reading, soak up remaining message */
- child_stopped_reading = 1;
- ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(02651)
- "Error writing request body to script %s",
- r->filename);
-
- }
- }
- apr_brigade_cleanup(bb);
+ else {
+ dbuf = NULL;
+ dbufsize = 0;
}
- while (!seen_eos);
- if (conf->logname) {
- dbuf[dbpos] = '\0';
+ /* Read the request body. */
+ rv = cgi_handle_request(r, tempsock, bb, dbuf, dbufsize);
+ if (rv) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01270)
+ "Error reading request entity data");
+ return ap_map_http_request_error(rv, HTTP_BAD_REQUEST);
}
/* we're done writing, or maybe we didn't write at all;
@@ -1603,125 +1622,22 @@ static int cgid_handler(request_rec *r)
*/
shutdown(sd, 1);
- /* Handle script return... */
- if (!nph) {
- conn_rec *c = r->connection;
- const char *location;
- char sbuf[MAX_STRING_LEN];
- int ret;
-
- bb = apr_brigade_create(r->pool, c->bucket_alloc);
- b = apr_bucket_pipe_create(tempsock, c->bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(bb, b);
- b = apr_bucket_eos_create(c->bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(bb, b);
-
- if ((ret = ap_scan_script_header_err_brigade_ex(r, bb, sbuf,
- APLOG_MODULE_INDEX)))
- {
- ret = log_script(r, conf, ret, dbuf, sbuf, bb, NULL);
-
- /*
- * ret could be HTTP_NOT_MODIFIED in the case that the CGI script
- * does not set an explicit status and ap_meets_conditions, which
- * is called by ap_scan_script_header_err_brigade, detects that
- * the conditions of the requests are met and the response is
- * not modified.
- * In this case set r->status and return OK in order to prevent
- * running through the error processing stack as this would
- * break with mod_cache, if the conditions had been set by
- * mod_cache itself to validate a stale entity.
- * BTW: We circumvent the error processing stack anyway if the
- * CGI script set an explicit status code (whatever it is) and
- * the only possible values for ret here are:
- *
- * HTTP_NOT_MODIFIED (set by ap_meets_conditions)
- * HTTP_PRECONDITION_FAILED (set by ap_meets_conditions)
- * HTTP_INTERNAL_SERVER_ERROR (if something went wrong during the
- * processing of the response of the CGI script, e.g broken headers
- * or a crashed CGI process).
- */
- if (ret == HTTP_NOT_MODIFIED) {
- r->status = ret;
- return OK;
- }
-
- return ret;
- }
-
- location = apr_table_get(r->headers_out, "Location");
-
- if (location && location[0] == '/' && r->status == 200) {
-
- /* Soak up all the script output */
- discard_script_output(bb);
- apr_brigade_destroy(bb);
- /* This redirect needs to be a GET no matter what the original
- * method was.
- */
- r->method = "GET";
- r->method_number = M_GET;
-
- /* We already read the message body (if any), so don't allow
- * the redirected request to think it has one. We can ignore
- * Transfer-Encoding, since we used REQUEST_CHUNKED_ERROR.
- */
- apr_table_unset(r->headers_in, "Content-Length");
-
- ap_internal_redirect_handler(location, r);
- return OK;
- }
- else if (location && r->status == 200) {
- /* XXX: Note that if a script wants to produce its own Redirect
- * body, it now has to explicitly *say* "Status: 302"
- */
- discard_script_output(bb);
- apr_brigade_destroy(bb);
- return HTTP_MOVED_TEMPORARILY;
- }
-
- rv = ap_pass_brigade(r->output_filters, bb);
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_TRACE1, rv, r,
- "Failed to flush CGI output to client");
- }
- }
-
- if (nph) {
- conn_rec *c = r->connection;
- struct ap_filter_t *cur;
-
- /* get rid of all filters up through protocol... since we
- * haven't parsed off the headers, there is no way they can
- * work
- */
-
- cur = r->proto_output_filters;
- while (cur && cur->frec->ftype < AP_FTYPE_CONNECTION) {
- cur = cur->next;
- }
- r->output_filters = r->proto_output_filters = cur;
-
- bb = apr_brigade_create(r->pool, c->bucket_alloc);
- b = apr_bucket_pipe_create(tempsock, c->bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(bb, b);
- b = apr_bucket_eos_create(c->bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(bb, b);
- ap_pass_brigade(r->output_filters, bb);
- }
+ bb = apr_brigade_create(r->pool, c->bucket_alloc);
+#ifdef HAVE_CGID_FDPASSING
+ b = cgi_bucket_create(r, dc->timeout, tempsock, script_err, c->bucket_alloc);
+ if (b == NULL)
+ return HTTP_INTERNAL_SERVER_ERROR; /* should call log_scripterror() w/ _UNAVAILABLE? */
+#else
+ b = apr_bucket_pipe_create(tempsock, c->bucket_alloc);
+#endif
+ APR_BRIGADE_INSERT_TAIL(bb, b);
+ b = apr_bucket_eos_create(c->bucket_alloc);
+ APR_BRIGADE_INSERT_TAIL(bb, b);
- return OK; /* NOT r->status, even if it has changed. */
+ return cgi_handle_response(r, nph, bb, timeout, conf, dbuf, script_err);
}
-
-
-
-/*============================================================================
- *============================================================================
- * This is the beginning of the cgi filter code moved from mod_include. This
- * is the code required to handle the "exec" SSI directive.
- *============================================================================
- *============================================================================*/
+/* Handling include= for mod_include. */
static apr_status_t include_cgi(include_ctx_t *ctx, ap_filter_t *f,
apr_bucket_brigade *bb, char *s)
{
@@ -1806,7 +1722,7 @@ static void add_ssi_vars(request_rec *r)
}
static int include_cmd(include_ctx_t *ctx, ap_filter_t *f,
- apr_bucket_brigade *bb, char *command)
+ apr_bucket_brigade *bb, const char *command)
{
char **env;
int sd;
@@ -1827,7 +1743,7 @@ static int include_cmd(include_ctx_t *ctx, ap_filter_t *f,
return retval;
}
- send_req(sd, r, command, env, SSI_REQ);
+ send_req(sd, NULL, r, command, env, SSI_REQ);
info = apr_palloc(r->pool, sizeof(struct cleanup_script_info));
info->conf = conf;
@@ -1872,91 +1788,6 @@ static int include_cmd(include_ctx_t *ctx, ap_filter_t *f,
return APR_SUCCESS;
}
-static apr_status_t handle_exec(include_ctx_t *ctx, ap_filter_t *f,
- apr_bucket_brigade *bb)
-{
- char *tag = NULL;
- char *tag_val = NULL;
- request_rec *r = f->r;
- char *file = r->filename;
- char parsed_string[MAX_STRING_LEN];
-
- if (!ctx->argc) {
- ap_log_rerror(APLOG_MARK,
- (ctx->flags & SSI_FLAG_PRINTING)
- ? APLOG_ERR : APLOG_WARNING,
- 0, r, APLOGNO(03196)
- "missing argument for exec element in %s", r->filename);
- }
-
- if (!(ctx->flags & SSI_FLAG_PRINTING)) {
- return APR_SUCCESS;
- }
-
- if (!ctx->argc) {
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- return APR_SUCCESS;
- }
-
- if (ctx->flags & SSI_FLAG_NO_EXEC) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01271) "exec used but not allowed "
- "in %s", r->filename);
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- return APR_SUCCESS;
- }
-
- while (1) {
- cgid_pfn_gtv(ctx, &tag, &tag_val, SSI_VALUE_DECODED);
- if (!tag || !tag_val) {
- break;
- }
-
- if (!strcmp(tag, "cmd")) {
- apr_status_t rv;
-
- cgid_pfn_ps(ctx, tag_val, parsed_string, sizeof(parsed_string),
- SSI_EXPAND_LEAVE_NAME);
-
- rv = include_cmd(ctx, f, bb, parsed_string);
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01272)
- "execution failure for parameter \"%s\" "
- "to tag exec in file %s", tag, r->filename);
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- break;
- }
- }
- else if (!strcmp(tag, "cgi")) {
- apr_status_t rv;
-
- cgid_pfn_ps(ctx, tag_val, parsed_string, sizeof(parsed_string),
- SSI_EXPAND_DROP_NAME);
-
- rv = include_cgi(ctx, f, bb, parsed_string);
- if (rv != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01273) "invalid CGI ref "
- "\"%s\" in %s", tag_val, file);
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- break;
- }
- }
- else {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01274) "unknown parameter "
- "\"%s\" to tag exec in %s", tag, file);
- SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
- break;
- }
- }
-
- return APR_SUCCESS;
-}
-/*============================================================================
- *============================================================================
- * This is the end of the cgi filter code moved from mod_include.
- *============================================================================
- *============================================================================*/
-
-
static void register_hook(apr_pool_t *p)
{
static const char * const aszPre[] = { "mod_include.c", NULL };
@@ -1964,6 +1795,7 @@ static void register_hook(apr_pool_t *p)
ap_hook_pre_config(cgid_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_post_config(cgid_init, aszPre, NULL, APR_HOOK_MIDDLE);
ap_hook_handler(cgid_handler, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_optional_fn_retrieve(cgi_optfns_retrieve, NULL, NULL, APR_HOOK_MIDDLE);
}
AP_DECLARE_MODULE(cgid) = {
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