VladPolskiy/apache-http-server
1
0
Fork 0
mirror of https://github.com/apache/httpd.git synced 2025-08-13 14:40:20 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
3686d94fed912aadf5536444bff027ae48a1ef5d
apache-http-server/server/util_script.c
Roy T. Fielding 3686d94fed Removed RLIMIT stuff, supposedly to be implemented later in mod_cgi. 
Disabled suexec, supposedly to be reimplemented later.

Submitted by:	Bill Stoddard, Dean Gaudet


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83764 13f79535-47bb-0310-9956-ffa450edef68
1999-08-26 12:02:31 +00:00

1100 lines
32 KiB
C
Raw Blame History

/* ====================================================================
* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
#define CORE_PRIVATE
#include "httpd.h"
#include "http_config.h"
#include "http_main.h"
#include "http_log.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_request.h" /* for sub_req_lookup_uri() */
#include "util_script.h"
#include "util_date.h" /* For parseHTTPdate() */
#ifdef OS2
#define INCL_DOS
#include <os2.h>
#endif
/*
* Various utility functions which are common to a whole lot of
* script-type extensions mechanisms, and might as well be gathered
* in one place (if only to avoid creating inter-module dependancies
* where there don't have to be).
*/
#define MALFORMED_MESSAGE "malformed header from script. Bad header="
#define MALFORMED_HEADER_LENGTH_TO_SHOW 30
/* If a request includes query info in the URL (stuff after "?"), and
* the query info does not contain "=" (indicative of a FORM submission),
* then 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
* must be NULL. The query info is split into separate arguments, where
* "+" is the separator between keyword arguments.
*
* XXXX: note that the WIN32 code uses one of the suexec strings
* to pass an interpreter name. Remember this if changing the way they
* are handled in create_argv.
*
*/
static char **create_argv(pool *p, char *path, char *user, char *group,
char *av0, const char *args)
{
int x, numwords;
char **av;
char *w;
int idx = 0;
/* count the number of keywords */
for (x = 0, numwords = 1; args[x]; x++) {
if (args[x] == '+') {
++numwords;
}
}
if (numwords > APACHE_ARG_MAX - 5) {
numwords = APACHE_ARG_MAX - 5; /* Truncate args to prevent overrun */
}
av = (char **) ap_palloc(p, (numwords + 5) * sizeof(char *));
if (path) {
av[idx++] = path;
}
if (user) {
av[idx++] = user;
}
if (group) {
av[idx++] = group;
}
av[idx++] = av0;
for (x = 1; x <= numwords; x++) {
w = ap_getword_nulls(p, &args, '+');
ap_unescape_url(w);
av[idx++] = ap_escape_shell_cmd(p, w);
}
av[idx] = NULL;
return av;
}
static char *http2env(pool *a, char *w)
{
char *res = ap_pstrcat(a, "HTTP_", w, NULL);
char *cp = res;
while (*++cp) {
if (!ap_isalnum(*cp) && *cp != '_') {
*cp = '_';
}
else {
*cp = ap_toupper(*cp);
}
}
return res;
}
API_EXPORT(char **) ap_create_environment(pool *p, table *t)
{
array_header *env_arr = ap_table_elts(t);
table_entry *elts = (table_entry *) env_arr->elts;
char **env = (char **) ap_palloc(p, (env_arr->nelts + 2) * sizeof(char *));
int i, j;
char *tz;
char *whack;
j = 0;
if (!ap_table_get(t, "TZ")) {
tz = getenv("TZ");
if (tz != NULL) {
env[j++] = ap_pstrcat(p, "TZ=", tz, NULL);
}
}
for (i = 0; i < env_arr->nelts; ++i) {
if (!elts[i].key) {
continue;
}
env[j] = ap_pstrcat(p, elts[i].key, "=", elts[i].val, NULL);
whack = env[j];
if (ap_isdigit(*whack)) {
*whack++ = '_';
}
while (*whack != '=') {
if (!ap_isalnum(*whack) && *whack != '_') {
*whack = '_';
}
++whack;
}
++j;
}
env[j] = NULL;
return env;
}
API_EXPORT(void) ap_add_common_vars(request_rec *r)
{
table *e;
server_rec *s = r->server;
conn_rec *c = r->connection;
const char *rem_logname;
char *env_path;
#ifdef WIN32
char *env_temp;
#endif
const char *host;
array_header *hdrs_arr = ap_table_elts(r->headers_in);
table_entry *hdrs = (table_entry *) hdrs_arr->elts;
int i;
/* use a temporary table which we'll overlap onto
* r->subprocess_env later
*/
e = ap_make_table(r->pool, 25 + hdrs_arr->nelts);
/* First, add environment vars from headers... this is as per
* CGI specs, though other sorts of scripting interfaces see
* the same vars...
*/
for (i = 0; i < hdrs_arr->nelts; ++i) {
if (!hdrs[i].key) {
continue;
}
/* A few headers are special cased --- Authorization to prevent
* rogue scripts from capturing passwords; content-type and -length
* for no particular reason.
*/
if (!strcasecmp(hdrs[i].key, "Content-type")) {
ap_table_addn(e, "CONTENT_TYPE", hdrs[i].val);
}
else if (!strcasecmp(hdrs[i].key, "Content-length")) {
ap_table_addn(e, "CONTENT_LENGTH", hdrs[i].val);
}
/*
* You really don't want to disable this check, since it leaves you
* wide open to CGIs stealing passwords and people viewing them
* in the environment with "ps -e". But, if you must...
*/
#ifndef SECURITY_HOLE_PASS_AUTHORIZATION
else if (!strcasecmp(hdrs[i].key, "Authorization")
|| !strcasecmp(hdrs[i].key, "Proxy-Authorization")) {
continue;
}
#endif
else {
ap_table_addn(e, http2env(r->pool, hdrs[i].key), hdrs[i].val);
}
}
if (!(env_path = getenv("PATH"))) {
env_path = DEFAULT_PATH;
}
#ifdef WIN32
if (env_temp = getenv("SystemRoot")) {
ap_table_addn(e, "SystemRoot", env_temp);
}
if (env_temp = getenv("COMSPEC")) {
ap_table_addn(e, "COMSPEC", env_temp);
}
if (env_temp = getenv("WINDIR")) {
ap_table_addn(e, "WINDIR", env_temp);
}
#endif
ap_table_addn(e, "PATH", env_path);
ap_table_addn(e, "SERVER_SIGNATURE", ap_psignature("", r));
ap_table_addn(e, "SERVER_SOFTWARE", ap_get_server_version());
ap_table_addn(e, "SERVER_NAME", ap_get_server_name(r));
ap_table_addn(e, "SERVER_ADDR", r->connection->local_ip); /* Apache */
ap_table_addn(e, "SERVER_PORT",
ap_psprintf(r->pool, "%u", ap_get_server_port(r)));
host = ap_get_remote_host(c, r->per_dir_config, REMOTE_HOST);
if (host) {
ap_table_addn(e, "REMOTE_HOST", host);
}
ap_table_addn(e, "REMOTE_ADDR", c->remote_ip);
ap_table_addn(e, "DOCUMENT_ROOT", ap_document_root(r)); /* Apache */
ap_table_addn(e, "SERVER_ADMIN", s->server_admin); /* Apache */
ap_table_addn(e, "SCRIPT_FILENAME", r->filename); /* Apache */
ap_table_addn(e, "REMOTE_PORT",
ap_psprintf(r->pool, "%d", ntohs(c->remote_addr.sin_port)));
if (r->user) {
ap_table_addn(e, "REMOTE_USER", r->user);
}
if (r->ap_auth_type) {
ap_table_addn(e, "AUTH_TYPE", r->ap_auth_type);
}
rem_logname = ap_get_remote_logname(r);
if (rem_logname) {
ap_table_addn(e, "REMOTE_IDENT", ap_pstrdup(r->pool, rem_logname));
}
/* Apache custom error responses. If we have redirected set two new vars */
if (r->prev) {
if (r->prev->args) {
ap_table_addn(e, "REDIRECT_QUERY_STRING", r->prev->args);
}
if (r->prev->uri) {
ap_table_addn(e, "REDIRECT_URL", r->prev->uri);
}
}
ap_overlap_tables(r->subprocess_env, e, AP_OVERLAP_TABLES_SET);
}
/* This "cute" little function comes about because the path info on
* filenames and URLs aren't always the same. So we take the two,
* and find as much of the two that match as possible.
*/
API_EXPORT(int) ap_find_path_info(const char *uri, const char *path_info)
{
int lu = strlen(uri);
int lp = strlen(path_info);
while (lu-- && lp-- && uri[lu] == path_info[lp]);
if (lu == -1) {
lu = 0;
}
while (uri[lu] != '\0' && uri[lu] != '/') {
lu++;
}
return lu;
}
/* Obtain the Request-URI from the original request-line, returning
* a new string from the request pool containing the URI or "".
*/
static char *original_uri(request_rec *r)
{
char *first, *last;
if (r->the_request == NULL) {
return (char *) ap_pcalloc(r->pool, 1);
}
first = r->the_request; /* use the request-line */
while (*first && !ap_isspace(*first)) {
++first; /* skip over the method */
}
while (ap_isspace(*first)) {
++first; /* and the space(s) */
}
last = first;
while (*last && !ap_isspace(*last)) {
++last; /* end at next whitespace */
}
return ap_pstrndup(r->pool, first, last - first);
}
API_EXPORT(void) ap_add_cgi_vars(request_rec *r)
{
table *e = r->subprocess_env;
ap_table_setn(e, "GATEWAY_INTERFACE", "CGI/1.1");
ap_table_setn(e, "SERVER_PROTOCOL", r->protocol);
ap_table_setn(e, "REQUEST_METHOD", r->method);
ap_table_setn(e, "QUERY_STRING", r->args ? r->args : "");
ap_table_setn(e, "REQUEST_URI", original_uri(r));
/* Note that the code below special-cases scripts run from includes,
* because it "knows" that the sub_request has been hacked to have the
* args and path_info of the original request, and not any that may have
* come with the script URI in the include command. Ugh.
*/
if (!strcmp(r->protocol, "INCLUDED")) {
ap_table_setn(e, "SCRIPT_NAME", r->uri);
if (r->path_info && *r->path_info) {
ap_table_setn(e, "PATH_INFO", r->path_info);
}
}
else if (!r->path_info || !*r->path_info) {
ap_table_setn(e, "SCRIPT_NAME", r->uri);
}
else {
int path_info_start = ap_find_path_info(r->uri, r->path_info);
ap_table_setn(e, "SCRIPT_NAME",
ap_pstrndup(r->pool, r->uri, path_info_start));
ap_table_setn(e, "PATH_INFO", r->path_info);
}
if (r->path_info && r->path_info[0]) {
/*
* To get PATH_TRANSLATED, treat PATH_INFO as a URI path.
* Need to re-escape it for this, since the entire URI was
* un-escaped before we determined where the PATH_INFO began.
*/
request_rec *pa_req;
pa_req = ap_sub_req_lookup_uri(ap_escape_uri(r->pool, r->path_info), r);
if (pa_req->filename) {
#ifdef WIN32
char buffer[HUGE_STRING_LEN];
#endif
char *pt = ap_pstrcat(r->pool, pa_req->filename, pa_req->path_info,
NULL);
#ifdef WIN32
/* We need to make this a real Windows path name */
GetFullPathName(pt, HUGE_STRING_LEN, buffer, NULL);
ap_table_setn(e, "PATH_TRANSLATED", ap_pstrdup(r->pool, buffer));
#else
ap_table_setn(e, "PATH_TRANSLATED", pt);
#endif
}
ap_destroy_sub_req(pa_req);
}
}
static int set_cookie_doo_doo(void *v, const char *key, const char *val)
{
ap_table_addn(v, key, val);
return 1;
}
API_EXPORT(int) ap_scan_script_header_err_core(request_rec *r, char *buffer,
int (*getsfunc) (char *, int, void *),
void *getsfunc_data)
{
char x[MAX_STRING_LEN];
char *w, *l;
int p;
int cgi_status = HTTP_OK;
table *merge;
table *cookie_table;
if (buffer) {
*buffer = '\0';
}
w = buffer ? buffer : x;
ap_hard_timeout("read script header", r);
/* temporary place to hold headers to merge in later */
merge = ap_make_table(r->pool, 10);
/* The HTTP specification says that it is legal to merge duplicate
* headers into one. Some browsers that support Cookies don't like
* merged headers and prefer that each Set-Cookie header is sent
* separately. Lets humour those browsers by not merging.
* Oh what a pain it is.
*/
cookie_table = ap_make_table(r->pool, 2);
ap_table_do(set_cookie_doo_doo, cookie_table, r->err_headers_out, "Set-Cookie", NULL);
while (1) {
if ((*getsfunc) (w, MAX_STRING_LEN - 1, getsfunc_data) == 0) {
ap_kill_timeout(r);
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
"Premature end of script headers: %s", r->filename);
return HTTP_INTERNAL_SERVER_ERROR;
}
/* Delete terminal (CR?)LF */
p = strlen(w);
if (p > 0 && w[p - 1] == '\n') {
if (p > 1 && w[p - 2] == '\015') {
w[p - 2] = '\0';
}
else {
w[p - 1] = '\0';
}
}
/*
* If we've finished reading the headers, check to make sure any
* HTTP/1.1 conditions are met. If so, we're done; normal processing
* will handle the script's output. If not, just return the error.
* The appropriate thing to do would be to send the script process a
* SIGPIPE to let it know we're ignoring it, close the channel to the
* script process, and *then* return the failed-to-meet-condition
* error. Otherwise we'd be waiting for the script to finish
* blithering before telling the client the output was no good.
* However, we don't have the information to do that, so we have to
* leave it to an upper layer.
*/
if (w[0] == '\0') {
int cond_status = OK;
ap_kill_timeout(r);
if ((cgi_status == HTTP_OK) && (r->method_number == M_GET)) {
cond_status = ap_meets_conditions(r);
}
ap_overlap_tables(r->err_headers_out, merge,
AP_OVERLAP_TABLES_MERGE);
if (!ap_is_empty_table(cookie_table)) {
/* the cookies have already been copied to the cookie_table */
ap_table_unset(r->err_headers_out, "Set-Cookie");
r->err_headers_out = ap_overlay_tables(r->pool,
r->err_headers_out, cookie_table);
}
return cond_status;
}
/* if we see a bogus header don't ignore it. Shout and scream */
#ifdef CHARSET_EBCDIC
/* Chances are that we received an ASCII header text instead of
* the expected EBCDIC header lines. Try to auto-detect:
*/
if (!(l = strchr(w, ':'))) {
int maybeASCII = 0, maybeEBCDIC = 0;
char *cp;
for (cp = w; *cp != '\0'; ++cp) {
if (isprint(*cp) && !isprint(os_toebcdic[*cp]))
++maybeEBCDIC;
if (!isprint(*cp) && isprint(os_toebcdic[*cp]))
++maybeASCII;
}
if (maybeASCII > maybeEBCDIC) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r->server,
"CGI Interface Error: Script headers apparently ASCII: (CGI = %s)", r->filename);
ascii2ebcdic(w, w, cp - w);
}
}
#endif
if (!(l = strchr(w, ':'))) {
char malformed[(sizeof MALFORMED_MESSAGE) + 1
+ MALFORMED_HEADER_LENGTH_TO_SHOW];
strcpy(malformed, MALFORMED_MESSAGE);
strncat(malformed, w, MALFORMED_HEADER_LENGTH_TO_SHOW);
if (!buffer) {
/* Soak up all the script output - may save an outright kill */
while ((*getsfunc) (w, MAX_STRING_LEN - 1, getsfunc_data)) {
continue;
}
}
ap_kill_timeout(r);
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
"%s: %s", malformed, r->filename);
return HTTP_INTERNAL_SERVER_ERROR;
}
*l++ = '\0';
while (*l && ap_isspace(*l)) {
++l;
}
if (!strcasecmp(w, "Content-type")) {
char *tmp;
/* Nuke trailing whitespace */
char *endp = l + strlen(l) - 1;
while (endp > l && ap_isspace(*endp)) {
*endp-- = '\0';
}
tmp = ap_pstrdup(r->pool, l);
ap_content_type_tolower(tmp);
r->content_type = tmp;
}
/*
* If the script returned a specific status, that's what
* we'll use - otherwise we assume 200 OK.
*/
else if (!strcasecmp(w, "Status")) {
r->status = cgi_status = atoi(l);
r->status_line = ap_pstrdup(r->pool, l);
}
else if (!strcasecmp(w, "Location")) {
ap_table_set(r->headers_out, w, l);
}
else if (!strcasecmp(w, "Content-Length")) {
ap_table_set(r->headers_out, w, l);
}
else if (!strcasecmp(w, "Transfer-Encoding")) {
ap_table_set(r->headers_out, w, l);
}
/*
* If the script gave us a Last-Modified header, we can't just
* pass it on blindly because of restrictions on future values.
*/
else if (!strcasecmp(w, "Last-Modified")) {
time_t mtime = ap_parseHTTPdate(l);
ap_update_mtime(r, mtime);
ap_set_last_modified(r);
}
else if (!strcasecmp(w, "Set-Cookie")) {
ap_table_add(cookie_table, w, l);
}
else {
ap_table_add(merge, w, l);
}
}
}
static int getsfunc_FILE(char *buf, int len, void *f)
{
return fgets(buf, len, (FILE *) f) != NULL;
}
API_EXPORT(int) ap_scan_script_header_err(request_rec *r, FILE *f,
char *buffer)
{
return ap_scan_script_header_err_core(r, buffer, getsfunc_FILE, f);
}
static int getsfunc_BUFF(char *w, int len, void *fb)
{
return ap_bgets(w, len, (BUFF *) fb) > 0;
}
API_EXPORT(int) ap_scan_script_header_err_buff(request_rec *r, BUFF *fb,
char *buffer)
{
return ap_scan_script_header_err_core(r, buffer, getsfunc_BUFF, fb);
}
API_EXPORT(void) ap_send_size(size_t size, request_rec *r)
{
/* XXX: this -1 thing is a gross hack */
if (size == (size_t)-1) {
ap_rputs(" -", r);
}
else if (!size) {
ap_rputs(" 0k", r);
}
else if (size < 1024) {
ap_rputs(" 1k", r);
}
else if (size < 1048576) {
ap_rprintf(r, "%4dk", (size + 512) / 1024);
}
else if (size < 103809024) {
ap_rprintf(r, "%4.1fM", size / 1048576.0);
}
else {
ap_rprintf(r, "%4dM", (size + 524288) / 1048576);
}
}
#if defined(OS2) || defined(WIN32)
static char **create_argv_cmd(pool *p, char *av0, const char *args, char *path)
{
register int x, n;
char **av;
char *w;
for (x = 0, n = 2; args[x]; x++) {
if (args[x] == '+') {
++n;
}
}
/* Add extra strings to array. */
n = n + 2;
av = (char **) ap_palloc(p, (n + 1) * sizeof(char *));
av[0] = av0;
/* Now insert the extra strings we made room for above. */
av[1] = strdup("/C");
av[2] = strdup(path);
for (x = (1 + 2); x < n; x++) {
w = ap_getword(p, &args, '+');
ap_unescape_url(w);
av[x] = ap_escape_shell_cmd(p, w);
}
av[n] = NULL;
return av;
}
#endif
/* ZZZ need to look at this in more depth and convert to an AP func so we
can get rid of OS specific code.
*/
API_EXPORT(int) ap_call_exec(request_rec *r, child_info *pinfo, char *argv0,
char **env, int shellcmd)
{
int pid = 0;
#if !defined(WIN32) && !defined(OS2)
/* the fd on r->server->error_log is closed, but we need somewhere to
* put the error messages from the log_* functions. So, we use stderr,
* since that is better than allowing errors to go unnoticed. Don't do
* this on Win32, though, since we haven't fork()'d.
*/
r->server->error_log = stderr;
#endif
/* TODO: all that RLimit stuff should become part of the spawning API,
* and not something in the core_dir_config... define a special rlimit
* structure and pass it in here.
*/
#ifdef OS2
{
/* Additions by Alec Kloss, to allow exec'ing of scripts under OS/2 */
int is_script = 0;
char interpreter[2048]; /* hope it's enough for the interpreter path */
char error_object[260];
FILE *program;
char *cmdline = r->filename, *cmdline_pos;
int cmdlen;
char *args = "", *args_end;
ULONG rc;
RESULTCODES rescodes;
int env_len, e;
char *env_block, *env_block_pos;
if (r->args && r->args[0] && !strchr(r->args, '='))
args = r->args;
program = fopen(r->filename, "rt");
if (!program) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r, "fopen(%s) failed",
r->filename);
return (pid);
}
fgets(interpreter, sizeof(interpreter), program);
fclose(program);
if (!strncmp(interpreter, "#!", 2)) {
is_script = 1;
interpreter[strlen(interpreter) - 1] = '\0';
if (interpreter[2] != '/' && interpreter[2] != '\\' && interpreter[3] != ':') {
char buffer[300];
if (DosSearchPath(SEARCH_ENVIRONMENT, "PATH", interpreter+2, buffer, sizeof(buffer)) == 0) {
strcpy(interpreter+2, buffer);
} else {
strcat(interpreter, ".exe");
if (DosSearchPath(SEARCH_ENVIRONMENT, "PATH", interpreter+2, buffer, sizeof(buffer)) == 0) {
strcpy(interpreter+2, buffer);
}
}
}
}
if (is_script) {
cmdline = ap_pstrcat(r->pool, interpreter+2, " ", r->filename, NULL);
}
else if (strstr(strupr(r->filename), ".CMD") > 0) {
/* Special case to allow use of REXX commands as scripts. */
os2pathname(r->filename);
cmdline = ap_pstrcat(r->pool, SHELL_PATH, " /C ", r->filename, NULL);
}
else {
cmdline = r->filename;
}
args = ap_pstrdup(r->pool, args);
ap_unescape_url(args);
args = ap_double_quotes(r->pool, args);
args_end = args + strlen(args);
if (args_end - args > 4000) { /* cmd.exe won't handle lines longer than 4k */
args_end = args + 4000;
*args_end = 0;
}
/* +4 = 1 space between progname and args, 2 for double null at end, 2 for possible quote on first arg */
cmdlen = strlen(cmdline) + strlen(args) + 4;
cmdline_pos = cmdline;
while (*cmdline_pos) {
cmdlen += 2 * (*cmdline_pos == '+'); /* Allow space for each arg to be quoted */
cmdline_pos++;
}
cmdline = ap_pstrndup(r->pool, cmdline, cmdlen);
cmdline_pos = cmdline + strlen(cmdline);
while (args < args_end) {
char *arg;
arg = ap_getword_nc(r->pool, &args, '+');
if (strpbrk(arg, "&|<> "))
arg = ap_pstrcat(r->pool, "\"", arg, "\"", NULL);
*(cmdline_pos++) = ' ';
strcpy(cmdline_pos, arg);
cmdline_pos += strlen(cmdline_pos);
}
*(++cmdline_pos) = 0; /* Add required second terminator */
args = strchr(cmdline, ' ');
if (args) {
*args = 0;
args++;
}
/* Create environment block from list of envariables */
for (env_len=1, e=0; env[e]; e++)
env_len += strlen(env[e]) + 1;
env_block = ap_palloc(r->pool, env_len);
env_block_pos = env_block;
for (e=0; env[e]; e++) {
strcpy(env_block_pos, env[e]);
env_block_pos += strlen(env_block_pos) + 1;
}
*env_block_pos = 0; /* environment block is terminated by a double null */
rc = DosExecPgm(error_object, sizeof(error_object), EXEC_ASYNC, cmdline, env_block, &rescodes, cmdline);
if (rc) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r, "DosExecPgm(%s %s) failed, %s - %s",
cmdline, args ? args : "", ap_os_error_message(rc), error_object );
return -1;
}
return rescodes.codeTerminate;
}
#elif defined(WIN32)
{
/* Adapted from Alec Kloss' work for OS/2 */
char *interpreter = NULL;
char *arguments = NULL;
char *ext = NULL;
char *exename = NULL;
char *s = NULL;
char *quoted_filename;
char *pCommand;
char *pEnvBlock, *pNext;
int i;
int iEnvBlockLen;
file_type_e fileType;
STARTUPINFO si;
PROCESS_INFORMATION pi;
memset(&si, 0, sizeof(si));
memset(&pi, 0, sizeof(pi));
pid = -1;
if (!shellcmd) {
fileType = ap_get_win32_interpreter(r, &interpreter);
if (fileType == eFileTypeUNKNOWN) {
ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, r,
"%s is not executable; ensure interpreted scripts have "
"\"#!\" first line",
r->filename);
return (pid);
}
/*
* Look at the arguments...
*/
arguments = "";
if ((r->args) && (r->args[0]) && !strchr(r->args, '=')) {
/* If we are in this leg, there are some other arguments
* that we must include in the execution of the CGI.
* Because CreateProcess is the way it is, we have to
* create a command line like format for the execution
* of the CGI. This means we need to create on long
* string with the executable and arguments.
*
* The arguments string comes in the request structure,
* and each argument is separated by a '+'. We'll replace
* these pluses with spaces.
*/
int iStringSize = 0;
int x;
/*
* Duplicate the request structure string so we don't change it.
*/
arguments = ap_pstrdup(r->pool, r->args);
/*
* Change the '+' to ' '
*/
for (x=0; arguments[x]; x++) {
if ('+' == arguments[x]) {
arguments[x] = ' ';
}
}
/*
* We need to unescape any characters that are
* in the arguments list.
*/
ap_unescape_url(arguments);
arguments = ap_escape_shell_cmd(r->pool, arguments);
}
/*
* We have the interpreter (if there is one) and we have
* the arguments (if there are any).
* Build the command string to pass to CreateProcess.
*/
quoted_filename = ap_pstrcat(r->pool, "\"", r->filename, "\"", NULL);
if (interpreter && *interpreter) {
pCommand = ap_pstrcat(r->pool, interpreter, " ",
quoted_filename, " ", arguments, NULL);
}
else {
pCommand = ap_pstrcat(r->pool, quoted_filename, " ", arguments, NULL);
}
} else {
char *shell_cmd = "CMD.EXE /C ";
OSVERSIONINFO osver;
osver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
/*
* Use CMD.EXE for NT, COMMAND.COM for WIN95
*/
if (GetVersionEx(&osver)) {
if (osver.dwPlatformId != VER_PLATFORM_WIN32_NT) {
shell_cmd = "COMMAND.COM /C ";
}
}
pCommand = ap_pstrcat(r->pool, shell_cmd, argv0, NULL);
}
/*
* Make child process use hPipeOutputWrite as standard out,
* and make sure it does not show on screen.
*/
si.cb = sizeof(si);
si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
si.wShowWindow = SW_HIDE;
si.hStdInput = pinfo->hPipeInputRead;
si.hStdOutput = pinfo->hPipeOutputWrite;
si.hStdError = pinfo->hPipeErrorWrite;
/*
* Win32's CreateProcess call requires that the environment
* be passed in an environment block, a null terminated block of
* null terminated strings.
*/
i = 0;
iEnvBlockLen = 1;
while (env[i]) {
iEnvBlockLen += strlen(env[i]) + 1;
i++;
}
pEnvBlock = (char *)ap_pcalloc(r->pool,iEnvBlockLen);
i = 0;
pNext = pEnvBlock;
while (env[i]) {
strcpy(pNext, env[i]);
pNext = pNext + strlen(pNext) + 1;
i++;
}
if (CreateProcess(NULL, pCommand, NULL, NULL, TRUE, DETACHED_PROCESS, pEnvBlock,
ap_make_dirstr_parent(r->pool, r->filename),
&si, &pi)) {
if (fileType == eFileTypeEXE16) {
/* Hack to get 16-bit CGI's working. It works for all the
* standard modules shipped with Apache. pi.dwProcessId is 0
* for 16-bit CGIs and all the Unix specific code that calls
* ap_call_exec interprets this as a failure case. And we can't
* use -1 either because it is mapped to 0 by the caller.
*/
pid = -2;
}
else {
pid = pi.dwProcessId;
/*
* We must close the handles to the new process and its main thread
* to prevent handle and memory leaks.
*/
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
}
}
return (pid);
}
#else
/* TODO: re-implement suexec */
#if 0
if (ap_suexec_enabled
&& ((r->server->server_uid != ap_user_id)
|| (r->server->server_gid != ap_group_id)
|| (!strncmp("/~", r->uri, 2)))) {
char *execuser, *grpname;
struct passwd *pw;
struct group *gr;
if (!strncmp("/~", r->uri, 2)) {
gid_t user_gid;
char *username = ap_pstrdup(r->pool, r->uri + 2);
char *pos = strchr(username, '/');
if (pos) {
*pos = '\0';
}
if ((pw = getpwnam(username)) == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
"getpwnam: invalid username %s", username);
return (pid);
}
execuser = ap_pstrcat(r->pool, "~", pw->pw_name, NULL);
user_gid = pw->pw_gid;
if ((gr = getgrgid(user_gid)) == NULL) {
if ((grpname = ap_palloc(r->pool, 16)) == NULL) {
return (pid);
}
else {
ap_snprintf(grpname, 16, "%ld", (long) user_gid);
}
}
else {
grpname = gr->gr_name;
}
}
else {
if ((pw = getpwuid(r->server->server_uid)) == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
"getpwuid: invalid userid %ld",
(long) r->server->server_uid);
return (pid);
}
execuser = ap_pstrdup(r->pool, pw->pw_name);
if ((gr = getgrgid(r->server->server_gid)) == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
"getgrgid: invalid groupid %ld",
(long) r->server->server_gid);
return (pid);
}
grpname = gr->gr_name;
}
if (shellcmd) {
execle(SUEXEC_BIN, SUEXEC_BIN, execuser, grpname, argv0,
NULL, env);
}
else if ((!r->args) || (!r->args[0]) || strchr(r->args, '=')) {
execle(SUEXEC_BIN, SUEXEC_BIN, execuser, grpname, argv0,
NULL, env);
}
else {
execve(SUEXEC_BIN,
create_argv(r->pool, SUEXEC_BIN, execuser, grpname,
argv0, r->args),
env);
}
}
else {
#endif
if (shellcmd) {
execle(SHELL_PATH, SHELL_PATH, "-c", argv0, NULL, env);
}
else if ((!r->args) || (!r->args[0]) || strchr(r->args, '=')) {
execle(r->filename, argv0, NULL, env);
}
else {
execve(r->filename,
create_argv(r->pool, NULL, NULL, NULL, argv0, r->args),
env);
}
#if 0
}
#endif
return (pid);
#endif
}
Reference in New Issue View Git Blame Copy Permalink