diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/modules/generators/mod_cgi.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/modules/generators/mod_cgi.c | 1235 |
1 files changed, 0 insertions, 1235 deletions
diff --git a/rubbos/app/httpd-2.0.64/modules/generators/mod_cgi.c b/rubbos/app/httpd-2.0.64/modules/generators/mod_cgi.c deleted file mode 100644 index 32902c10..00000000 --- a/rubbos/app/httpd-2.0.64/modules/generators/mod_cgi.c +++ /dev/null @@ -1,1235 +0,0 @@ -/* 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. - */ - -/* - * http_script: keeps all script-related ramblings together. - * - * Compliant to CGI/1.1 spec - * - * Adapted by rst from original NCSA code by Rob McCool - * - * Apache adds some new env vars; REDIRECT_URL and REDIRECT_QUERY_STRING for - * custom error responses, and DOCUMENT_ROOT because we found it useful. - * It also adds SERVER_ADMIN - useful for scripts to know who to mail when - * they fail. - */ - -#include "apr.h" -#include "apr_strings.h" -#include "apr_thread_proc.h" /* for RLIMIT stuff */ -#include "apr_optional.h" -#include "apr_buckets.h" -#include "apr_lib.h" -#include "apr_poll.h" - -#define APR_WANT_STRFUNC -#include "apr_want.h" - -#define CORE_PRIVATE - -#include "util_filter.h" -#include "ap_config.h" -#include "httpd.h" -#include "http_config.h" -#include "http_request.h" -#include "http_core.h" -#include "http_protocol.h" -#include "http_main.h" -#include "http_log.h" -#include "util_script.h" -#include "ap_mpm.h" -#include "mod_core.h" -#include "mod_cgi.h" - -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 */ -static void discard_script_output(apr_bucket_brigade *bb); - -/* KLUDGE --- for back-combatibility, we don't have to check ExecCGI - * in ScriptAliased directories, which means we need to know if this - * request came through ScriptAlias or not... so the Alias module - * leaves a note for us. - */ - -static int is_scriptaliased(request_rec *r) -{ - const char *t = apr_table_get(r->notes, "alias-forced-type"); - return t && (!strcasecmp(t, "cgi-script")); -} - -/* Configuration stuff */ - -#define DEFAULT_LOGBYTES 10385760 -#define DEFAULT_BUFBYTES 1024 - -typedef struct { - const char *logname; - long logbytes; - apr_size_t bufbytes; -} cgi_server_conf; - -static void *create_cgi_config(apr_pool_t *p, server_rec *s) -{ - cgi_server_conf *c = - (cgi_server_conf *) apr_pcalloc(p, sizeof(cgi_server_conf)); - - c->logname = NULL; - c->logbytes = DEFAULT_LOGBYTES; - c->bufbytes = DEFAULT_BUFBYTES; - - return c; -} - -static void *merge_cgi_config(apr_pool_t *p, void *basev, void *overridesv) -{ - cgi_server_conf *base = (cgi_server_conf *) basev, - *overrides = (cgi_server_conf *) overridesv; - - return overrides->logname ? overrides : base; -} - -static const char *set_scriptlog(cmd_parms *cmd, void *dummy, const char *arg) -{ - server_rec *s = cmd->server; - cgi_server_conf *conf = ap_get_module_config(s->module_config, - &cgi_module); - - conf->logname = ap_server_root_relative(cmd->pool, arg); - - if (!conf->logname) { - return apr_pstrcat(cmd->pool, "Invalid ScriptLog path ", - arg, NULL); - } - - return NULL; -} - -static const char *set_scriptlog_length(cmd_parms *cmd, void *dummy, - const char *arg) -{ - server_rec *s = cmd->server; - cgi_server_conf *conf = ap_get_module_config(s->module_config, - &cgi_module); - - conf->logbytes = atol(arg); - return NULL; -} - -static const char *set_scriptlog_buffer(cmd_parms *cmd, void *dummy, - const char *arg) -{ - server_rec *s = cmd->server; - cgi_server_conf *conf = ap_get_module_config(s->module_config, - &cgi_module); - - conf->bufbytes = atoi(arg); - return NULL; -} - -static const command_rec cgi_cmds[] = -{ -AP_INIT_TAKE1("ScriptLog", set_scriptlog, NULL, RSRC_CONF, - "the name of a log for script debugging info"), -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"), - {NULL} -}; - -static int log_scripterror(request_rec *r, cgi_server_conf * conf, int ret, - apr_status_t rv, 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; - - 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 || - ((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; - - while ((rv = apr_file_gets(argsbuffer, HUGE_STRING_LEN, - script_err)) == APR_SUCCESS) { - newline = strchr(argsbuffer, '\n'); - if (newline) { - *newline = '\0'; - } - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "%s", 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) -{ - const apr_array_header_t *hdrs_arr = apr_table_elts(r->headers_in); - const apr_table_entry_t *hdrs = (const apr_table_entry_t *) hdrs_arr->elts; - char argsbuffer[HUGE_STRING_LEN]; - apr_file_t *f = NULL; - apr_bucket *e; - const char *buf; - apr_size_t len; - apr_status_t rv; - int first; - int i; - apr_finfo_t finfo; - char time_str[APR_CTIME_LEN]; - - /* 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)) { - /* Soak up script output */ - discard_script_output(bb); - log_script_err(r, script_err); - 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_puts("%request\n", f); - for (i = 0; i < hdrs_arr->nelts; ++i) { - if (!hdrs[i].key) - continue; - apr_file_printf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val); - } - if ((r->method_number == M_POST || r->method_number == M_PUT) && - *dbuf) { - apr_file_printf(f, "\n%s\n", dbuf); - } - - apr_file_puts("%response\n", f); - hdrs_arr = apr_table_elts(r->err_headers_out); - hdrs = (const apr_table_entry_t *) hdrs_arr->elts; - - for (i = 0; i < hdrs_arr->nelts; ++i) { - if (!hdrs[i].key) - continue; - apr_file_printf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val); - } - - if (sbuf && *sbuf) - apr_file_printf(f, "%s\n", sbuf); - - first = 1; - APR_BRIGADE_FOREACH(e, bb) { - if (APR_BUCKET_IS_EOS(e)) { - break; - } - rv = apr_bucket_read(e, &buf, &len, APR_BLOCK_READ); - if (rv != APR_SUCCESS || (len == 0)) { - break; - } - if (first) { - apr_file_puts("%stdout\n", f); - first = 0; - } - apr_file_write(f, buf, &len); - apr_file_puts("\n", f); - } - - if (apr_file_gets(argsbuffer, HUGE_STRING_LEN, script_err) == APR_SUCCESS) { - apr_file_puts("%stderr\n", f); - apr_file_puts(argsbuffer, f); - while (apr_file_gets(argsbuffer, HUGE_STRING_LEN, - script_err) == APR_SUCCESS) { - apr_file_puts(argsbuffer, f); - } - apr_file_puts("\n", f); - } - - apr_brigade_destroy(bb); - apr_file_close(script_err); - - apr_file_close(f); - return ret; -} - - -/* This is the special environment used for running the "exec cmd=" - * variety of SSI directives. - */ -static void add_ssi_vars(request_rec *r) -{ - apr_table_t *e = r->subprocess_env; - - if (r->path_info && r->path_info[0] != '\0') { - request_rec *pa_req; - - apr_table_setn(e, "PATH_INFO", ap_escape_shell_cmd(r->pool, - r->path_info)); - - pa_req = ap_sub_req_lookup_uri(ap_escape_uri(r->pool, r->path_info), - r, NULL); - if (pa_req->filename) { - apr_table_setn(e, "PATH_TRANSLATED", - apr_pstrcat(r->pool, pa_req->filename, - pa_req->path_info, NULL)); - } - ap_destroy_sub_req(pa_req); - } - - if (r->args) { - char *arg_copy = apr_pstrdup(r->pool, r->args); - - apr_table_setn(e, "QUERY_STRING", r->args); - ap_unescape_url(arg_copy); - apr_table_setn(e, "QUERY_STRING_UNESCAPED", - ap_escape_shell_cmd(r->pool, arg_copy)); - } -} - -static void cgi_child_errfn(apr_pool_t *pool, apr_status_t err, - const char *description) -{ - apr_file_t *stderr_log; - char errbuf[200]; - - apr_file_open_stderr(&stderr_log, pool); - /* Escape the logged string because it may be something that - * came in over the network. - */ - apr_file_printf(stderr_log, - "(%d)%s: %s\n", - err, - apr_strerror(err, errbuf, sizeof(errbuf)), -#ifdef AP_UNSAFE_ERROR_LOG_UNESCAPED - description -#else - ap_escape_logitem(pool, description) -#endif - ); -} - -static apr_status_t run_cgi_child(apr_file_t **script_out, - apr_file_t **script_in, - apr_file_t **script_err, - const char *command, - const char * const argv[], - request_rec *r, - apr_pool_t *p, - cgi_exec_info_t *e_info) -{ - const char * const *env; - apr_procattr_t *procattr; - apr_proc_t *procnew; - apr_status_t rc = APR_SUCCESS; - -#if defined(RLIMIT_CPU) || defined(RLIMIT_NPROC) || \ - defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined (RLIMIT_AS) - - core_dir_config *conf = ap_get_module_config(r->per_dir_config, - &core_module); -#endif - -#ifdef DEBUG_CGI -#ifdef OS2 - /* Under OS/2 need to use device con. */ - FILE *dbg = fopen("con", "w"); -#else - FILE *dbg = fopen("/dev/tty", "w"); -#endif - int i; -#endif - - RAISE_SIGSTOP(CGI_CHILD); -#ifdef DEBUG_CGI - fprintf(dbg, "Attempting to exec %s as CGI child (argv0 = %s)\n", - r->filename, argv[0]); -#endif - - env = (const char * const *)ap_create_environment(p, r->subprocess_env); - -#ifdef DEBUG_CGI - fprintf(dbg, "Environment: \n"); - for (i = 0; env[i]; ++i) - fprintf(dbg, "'%s'\n", env[i]); -#endif - - /* Transmute ourselves into the script. - * NB only ISINDEX scripts get decoded arguments. - */ - if (((rc = apr_procattr_create(&procattr, p)) != APR_SUCCESS) || - ((rc = apr_procattr_io_set(procattr, - e_info->in_pipe, - e_info->out_pipe, - e_info->err_pipe)) != APR_SUCCESS) || - ((rc = apr_procattr_dir_set(procattr, - ap_make_dirstr_parent(r->pool, - r->filename))) != APR_SUCCESS) || -#ifdef RLIMIT_CPU - ((rc = apr_procattr_limit_set(procattr, APR_LIMIT_CPU, - conf->limit_cpu)) != APR_SUCCESS) || -#endif -#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS) - ((rc = apr_procattr_limit_set(procattr, APR_LIMIT_MEM, - conf->limit_mem)) != APR_SUCCESS) || -#endif -#ifdef RLIMIT_NPROC - ((rc = apr_procattr_limit_set(procattr, APR_LIMIT_NPROC, - conf->limit_nproc)) != APR_SUCCESS) || -#endif - ((rc = apr_procattr_cmdtype_set(procattr, - e_info->cmd_type)) != APR_SUCCESS) || - - ((rc = apr_procattr_detach_set(procattr, - e_info->detached & AP_PROC_DETACHED)) != APR_SUCCESS) || - ((rc = apr_procattr_addrspace_set(procattr, - (e_info->detached & AP_PROC_NEWADDRSPACE) ? 1 : 0)) != APR_SUCCESS) || - ((rc = apr_procattr_child_errfn_set(procattr, cgi_child_errfn)) != APR_SUCCESS)) { - /* Something bad happened, tell the world. */ - ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, - "couldn't set child process attributes: %s", r->filename); - } - else { - procnew = apr_pcalloc(p, sizeof(*procnew)); - if (e_info->prog_type == RUN_AS_SSI) { - SPLIT_AND_PASS_PRETAG_BUCKETS(*(e_info->bb), e_info->ctx, - e_info->next, rc); - if (rc != APR_SUCCESS) { - return rc; - } - } - - rc = ap_os_create_privileged_process(r, procnew, command, argv, env, - procattr, p); - - if (rc != APR_SUCCESS) { - /* Bad things happened. Everyone should have cleaned up. */ - ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_TOCLIENT, rc, r, - "couldn't create child process: %d: %s", rc, - apr_filename_of_pathname(r->filename)); - } - else { - 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); - - 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); - - *script_err = procnew->err; - if (!*script_err) - return APR_EBADF; - apr_file_pipe_timeout_set(*script_err, r->server->timeout); - } - } - } -#ifdef DEBUG_CGI - fclose(dbg); -#endif - return (rc); -} - - -static apr_status_t default_build_command(const char **cmd, const char ***argv, - request_rec *r, apr_pool_t *p, - cgi_exec_info_t *e_info) -{ - int numwords, x, idx; - char *w; - const char *args = NULL; - - if (e_info->process_cgi) { - *cmd = r->filename; - /* Do not process r->args if they contain an '=' assignment - */ - if (r->args && r->args[0] && !ap_strchr_c(r->args, '=')) { - args = r->args; - } - } - - if (!args) { - numwords = 1; - } - else { - /* count the number of keywords */ - for (x = 0, numwords = 2; args[x]; x++) { - if (args[x] == '+') { - ++numwords; - } - } - } - /* Everything is - 1 to account for the first parameter - * which is the program name. - */ - if (numwords > APACHE_ARG_MAX - 1) { - numwords = APACHE_ARG_MAX - 1; /* Truncate args to prevent overrun */ - } - *argv = apr_palloc(p, (numwords + 2) * sizeof(char *)); - (*argv)[0] = *cmd; - for (x = 1, idx = 1; x < numwords; x++) { - w = ap_getword_nulls(p, &args, '+'); - ap_unescape_url(w); - (*argv)[idx++] = ap_escape_shell_cmd(p, w); - } - (*argv)[idx] = NULL; - - return APR_SUCCESS; -} - -static void discard_script_output(apr_bucket_brigade *bb) -{ - apr_bucket *e; - const char *buf; - apr_size_t len; - apr_status_t rv; - APR_BRIGADE_FOREACH(e, bb) { - if (APR_BUCKET_IS_EOS(e)) { - break; - } - rv = apr_bucket_read(e, &buf, &len, APR_BLOCK_READ); - if (rv != APR_SUCCESS) { - break; - } - } -} - -#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); - AP_DEBUG_ASSERT(rv == APR_SUCCESS); - - 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); - AP_DEBUG_ASSERT(rv == APR_SUCCESS); - - fd.desc.f = err; /* script's stderr */ - fd.client_data = (void *)2; - rv = apr_pollset_add(data->pollset, &fd); - AP_DEBUG_ASSERT(rv == APR_SUCCESS); - - 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)) { - return timeout == 0 ? APR_EAGAIN : rv; - } - else if (APR_STATUS_IS_EINTR(rv)) { - continue; - } - else if (rv != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, data->r, - "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; - 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; - 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 = r->connection; - - if(strcmp(r->handler, CGI_MAGIC_TYPE) && strcmp(r->handler, "cgi-script")) - return DECLINED; - - is_included = !strcmp(r->protocol, "INCLUDED"); - - p = r->main ? r->main->pool : r->pool; - - argv0 = apr_filename_of_pathname(r->filename); - nph = !(strncmp(argv0, "nph-", 4)); - conf = ap_get_module_config(r->server->module_config, &cgi_module); - - if (!(ap_allow_options(r) & OPT_EXECCGI) && !is_scriptaliased(r)) - return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, - "Options ExecCGI is off in this directory"); - if (nph && is_included) - return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, - "attempt to include NPH CGI script"); - - if (r->finfo.filetype == 0) - return log_scripterror(r, conf, HTTP_NOT_FOUND, 0, - "script not found or unable to stat"); - if (r->finfo.filetype == APR_DIR) - return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, - "attempt to invoke directory as script"); - - if ((r->used_path_info == AP_REQ_REJECT_PATH_INFO) && - r->path_info && *r->path_info) - { - /* default to accept */ - return log_scripterror(r, conf, HTTP_NOT_FOUND, 0, - "AcceptPathInfo off disallows user's path"); - } -/* - if (!ap_suexec_enabled) { - if (!ap_can_exec(&r->finfo)) - return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, - "file permissions deny server execution"); - } - -*/ - ap_add_common_vars(r); - ap_add_cgi_vars(r); - - e_info.process_cgi = 1; - e_info.cmd_type = APR_PROGRAM; - e_info.detached = 0; - e_info.in_pipe = APR_CHILD_BLOCK; - e_info.out_pipe = APR_CHILD_BLOCK; - e_info.err_pipe = APR_CHILD_BLOCK; - e_info.prog_type = RUN_AS_CGI; - e_info.bb = NULL; - e_info.ctx = NULL; - e_info.next = NULL; - - /* build the command line */ - if ((rv = cgi_build_command(&command, &argv, r, p, &e_info)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "don't know how to spawn child process: %s", - r->filename); - return HTTP_INTERNAL_SERVER_ERROR; - } - - /* run the script in its own process */ - if ((rv = run_cgi_child(&script_out, &script_in, &script_err, - command, argv, r, p, &e_info)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "couldn't spawn child process: %s", r->filename); - 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; - if (conf->logname) { - dbuf = apr_palloc(r->pool, conf->bufbytes + 1); - 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) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "Error reading request entity data"); - return HTTP_INTERNAL_SERVER_ERROR; - } - - APR_BRIGADE_FOREACH(bucket, bb) { - 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); - } - while (!seen_eos); - - if (conf->logname) { - dbuf[dbpos] = '\0'; - } - /* Is this flush really needed? */ - apr_file_flush(script_out); - apr_file_close(script_out); - - AP_DEBUG_ASSERT(script_in != NULL); - - apr_brigade_cleanup(bb); - -#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); -#else - b = apr_bucket_pipe_create(script_in, c->bucket_alloc); -#endif - APR_BRIGADE_INSERT_TAIL(bb, b); - 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(r, bb, sbuf))) { - return log_script(r, conf, ret, dbuf, sbuf, bb, script_err); - } - - location = apr_table_get(r->headers_out, "Location"); - - if (location && location[0] == '/' && r->status == 200) { - discard_script_output(bb); - apr_brigade_destroy(bb); - apr_file_pipe_timeout_set(script_err, r->server->timeout); - log_script_err(r, script_err); - /* This redirect needs to be a GET no matter what the original - * method was. - */ - r->method = apr_pstrdup(r->pool, "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) { - /* XX 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 (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. */ -} - -/*============================================================================ - *============================================================================ - * This is the beginning of the cgi filter code moved from mod_include. This - * is the code required to handle the "exec" SSI directive. - *============================================================================ - *============================================================================*/ -static int include_cgi(char *s, request_rec *r, ap_filter_t *next, - apr_bucket *head_ptr, apr_bucket **inserted_head) -{ - request_rec *rr = ap_sub_req_lookup_uri(s, r, next); - int rr_status; - apr_bucket *tmp_buck, *tmp2_buck; - - if (rr->status != HTTP_OK) { - ap_destroy_sub_req(rr); - return -1; - } - - /* No hardwired path info or query allowed */ - - if ((rr->path_info && rr->path_info[0]) || rr->args) { - ap_destroy_sub_req(rr); - return -1; - } - if (rr->finfo.filetype != APR_REG) { - ap_destroy_sub_req(rr); - return -1; - } - - /* Script gets parameters of the *document*, for back compatibility */ - - rr->path_info = r->path_info; /* hard to get right; see mod_cgi.c */ - rr->args = r->args; - - /* Force sub_req to be treated as a CGI request, even if ordinary - * typing rules would have called it something else. - */ - - ap_set_content_type(rr, CGI_MAGIC_TYPE); - - /* Run it. */ - - rr_status = ap_run_sub_req(rr); - if (ap_is_HTTP_REDIRECT(rr_status)) { - apr_size_t len_loc; - const char *location = apr_table_get(rr->headers_out, "Location"); - conn_rec *c = r->connection; - - location = ap_escape_html(rr->pool, location); - len_loc = strlen(location); - - /* XXX: if most of this stuff is going to get copied anyway, - * it'd be more efficient to pstrcat it into a single pool buffer - * and a single pool bucket */ - - tmp_buck = apr_bucket_immortal_create("<A HREF=\"", - sizeof("<A HREF=\"") - 1, - c->bucket_alloc); - APR_BUCKET_INSERT_BEFORE(head_ptr, tmp_buck); - tmp2_buck = apr_bucket_heap_create(location, len_loc, NULL, - c->bucket_alloc); - APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); - tmp2_buck = apr_bucket_immortal_create("\">", sizeof("\">") - 1, - c->bucket_alloc); - APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); - tmp2_buck = apr_bucket_heap_create(location, len_loc, NULL, - c->bucket_alloc); - APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); - tmp2_buck = apr_bucket_immortal_create("</A>", sizeof("</A>") - 1, - c->bucket_alloc); - APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); - - if (*inserted_head == NULL) { - *inserted_head = tmp_buck; - } - } - - ap_destroy_sub_req(rr); - - return 0; -} - - -static int include_cmd(include_ctx_t *ctx, apr_bucket_brigade **bb, - const char *command, request_rec *r, ap_filter_t *f) -{ - cgi_exec_info_t e_info; - const char **argv; - apr_file_t *script_out = NULL, *script_in = NULL, *script_err = NULL; - apr_bucket_brigade *bcgi; - apr_bucket *b; - apr_status_t rv; - - add_ssi_vars(r); - - e_info.process_cgi = 0; - e_info.cmd_type = APR_SHELLCMD; - e_info.detached = 0; - e_info.in_pipe = APR_NO_PIPE; - e_info.out_pipe = APR_FULL_BLOCK; - e_info.err_pipe = APR_NO_PIPE; - e_info.prog_type = RUN_AS_SSI; - e_info.bb = bb; - e_info.ctx = ctx; - e_info.next = f->next; - - if ((rv = cgi_build_command(&command, &argv, r, r->pool, &e_info)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "don't know how to spawn cmd child process: %s", - r->filename); - return HTTP_INTERNAL_SERVER_ERROR; - } - - /* run the script in its own process */ - if ((rv = run_cgi_child(&script_out, &script_in, &script_err, - command, argv, r, r->pool, - &e_info)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "couldn't spawn child process: %s", r->filename); - return HTTP_INTERNAL_SERVER_ERROR; - } - - bcgi = apr_brigade_create(r->pool, f->c->bucket_alloc); - b = apr_bucket_pipe_create(script_in, f->c->bucket_alloc); - APR_BRIGADE_INSERT_TAIL(bcgi, b); - ap_pass_brigade(f->next, bcgi); - - /* We can't close the pipe here, because we may return before the - * full CGI has been sent to the network. That's okay though, - * because we can rely on the pool to close the pipe for us. - */ - - return 0; -} - -static int handle_exec(include_ctx_t *ctx, apr_bucket_brigade **bb, - request_rec *r, ap_filter_t *f, apr_bucket *head_ptr, - apr_bucket **inserted_head) -{ - char *tag = NULL; - char *tag_val = NULL; - char *file = r->filename; - apr_bucket *tmp_buck; - char parsed_string[MAX_STRING_LEN]; - - *inserted_head = NULL; - if (ctx->flags & FLAG_PRINTING) { - if (ctx->flags & FLAG_NO_EXEC) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "exec used but not allowed in %s", r->filename); - CREATE_ERROR_BUCKET(ctx, tmp_buck, head_ptr, *inserted_head); - } - else { - while (1) { - cgi_pfn_gtv(ctx, &tag, &tag_val, 1); - if (tag_val == NULL) { - if (tag == NULL) { - return 0; - } - else { - return 1; - } - } - if (!strcmp(tag, "cmd")) { - cgi_pfn_ps(r, ctx, tag_val, parsed_string, - sizeof(parsed_string), 1); - if (include_cmd(ctx, bb, parsed_string, r, f) == -1) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "execution failure for parameter \"%s\" " - "to tag exec in file %s", tag, r->filename); - CREATE_ERROR_BUCKET(ctx, tmp_buck, head_ptr, - *inserted_head); - } - } - else if (!strcmp(tag, "cgi")) { - apr_status_t retval = APR_SUCCESS; - - cgi_pfn_ps(r, ctx, tag_val, parsed_string, - sizeof(parsed_string), 0); - - SPLIT_AND_PASS_PRETAG_BUCKETS(*bb, ctx, f->next, retval); - if (retval != APR_SUCCESS) { - return retval; - } - - if (include_cgi(parsed_string, r, f->next, head_ptr, - inserted_head) == -1) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "invalid CGI ref \"%s\" in %s", - tag_val, file); - CREATE_ERROR_BUCKET(ctx, tmp_buck, head_ptr, - *inserted_head); - } - } - else { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "unknown parameter \"%s\" to tag exec in %s", - tag, file); - CREATE_ERROR_BUCKET(ctx, tmp_buck, head_ptr, - *inserted_head); - } - } - } - } - return 0; -} - - -/*============================================================================ - *============================================================================ - * 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) - */ - cgi_build_command = APR_RETRIEVE_OPTIONAL_FN(ap_cgi_build_command); - if (!cgi_build_command) { - cgi_build_command = default_build_command; - } - return OK; -} - -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); -} - -module AP_MODULE_DECLARE_DATA cgi_module = -{ - STANDARD20_MODULE_STUFF, - NULL, /* dir config creater */ - NULL, /* dir merger --- default is to override */ - create_cgi_config, /* server config */ - merge_cgi_config, /* merge server config */ - cgi_cmds, /* command apr_table_t */ - register_hooks /* register hooks */ -}; |