{
struct { int rd; int wr; } fromCgi; /* CGI -> httpd pipe */
struct { int rd; int wr; } toCgi; /* httpd -> CGI pipe */
- char *argp[] = { NULL, NULL };
- int pid = 0;
+ char *fullpath;
+ char *script;
+ char *purl;
+ size_t post_read_size, post_read_idx;
int buf_count;
int status;
- size_t post_read_size, post_read_idx;
+ int pid = 0;
+ int sv_accepted_socket = accepted_socket;
+
+ /*
+ * We are mucking with environment _first_ and then vfork/exec,
+ * this allows us to use vfork safely. Parent don't care about
+ * these environment changes anyway.
+ */
+
+ /*
+ * Find PATH_INFO.
+ */
+ purl = xstrdup(url);
+ script = purl;
+ while ((script = strchr(script + 1, '/')) != NULL) {
+ /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
+ struct stat sb;
+
+ *script = '\0';
+ if (!is_directory(purl + 1, 1, &sb)) {
+ /* not directory, found script.cgi/PATH_INFO */
+ *script = '/';
+ break;
+ }
+ *script = '/'; /* is directory, find next '/' */
+ }
+ setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */
+ setenv1("REQUEST_METHOD", request);
+ if (g_query) {
+ putenv(xasprintf("%s=%s?%s", "REQUEST_URI", purl, g_query));
+ } else {
+ setenv1("REQUEST_URI", purl);
+ }
+ if (script != NULL)
+ *script = '\0'; /* cut off /PATH_INFO */
+
+ /* SCRIPT_FILENAME required by PHP in CGI mode */
+ fullpath = concat_path_file(home_httpd, purl);
+ setenv1("SCRIPT_FILENAME", fullpath);
+ /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
+ setenv1("SCRIPT_NAME", purl);
+ /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
+ * QUERY_STRING: The information which follows the ? in the URL
+ * which referenced this script. This is the query information.
+ * It should not be decoded in any fashion. This variable
+ * should always be set when there is query information,
+ * regardless of command line decoding. */
+ /* (Older versions of bbox seem to do some decoding) */
+ setenv1("QUERY_STRING", g_query);
+ putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
+ putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
+ putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
+ /* Having _separate_ variables for IP and port defeats
+ * the purpose of having socket abstraction. Which "port"
+ * are you using on Unix domain socket?
+ * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
+ * Oh well... */
+ {
+ char *p = rmt_ip_str ? rmt_ip_str : (char*)"";
+ char *cp = strrchr(p, ':');
+ if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
+ cp = NULL;
+ if (cp) *cp = '\0'; /* delete :PORT */
+ setenv1("REMOTE_ADDR", p);
+ if (cp) *cp = ':';
+ }
+ setenv1("HTTP_USER_AGENT", user_agent);
+#if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
+ setenv_long("REMOTE_PORT", tcp_port);
+#endif
+ if (bodyLen)
+ setenv_long("CONTENT_LENGTH", bodyLen);
+ if (cookie)
+ setenv1("HTTP_COOKIE", cookie);
+ if (content_type)
+ setenv1("CONTENT_TYPE", content_type);
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ if (remoteuser) {
+ setenv1("REMOTE_USER", remoteuser);
+ putenv((char*)"AUTH_TYPE=Basic");
+ }
+#endif
+ if (referer)
+ setenv1("HTTP_REFERER", referer);
xpipe(&fromCgi.rd);
xpipe(&toCgi.rd);
-/*
- * Note: We can use vfork() here in the no-mmu case, although
- * the child modifies the parent's variables, due to:
- * 1) The parent does not use the child-modified variables.
- * 2) The allocated memory (in the child) is freed when the process
- * exits. This happens instantly after the child finishes,
- * since httpd is run from inetd (and it can't run standalone
- * in uClinux).
- * TODO: we can muck with environment _first_ and then fork/exec,
- * that will be more understandable, and safer wrt vfork!
- */
-
-#if !BB_MMU
pid = vfork();
-#else
- pid = fork();
-#endif
if (pid < 0) {
/* TODO: log perror? */
log_and_exit();
}
if (!pid) {
- /* child process */
- char *fullpath;
- char *script;
- char *purl;
-
+ /* Child process */
xfunc_error_retval = 242;
if (accepted_socket > 1)
xmove_fd(fromCgi.wr, 1); /* replace stdout with the pipe */
close(fromCgi.rd);
close(toCgi.wr);
- /* Huh? User seeing stderr can be a security problem.
+ /* User seeing stderr output can be a security problem.
* If CGI really wants that, it can always do dup itself. */
/* dup2(1, 2); */
- /*
- * Find PATH_INFO.
- */
- purl = xstrdup(url);
- script = purl;
- while ((script = strchr(script + 1, '/')) != NULL) {
- /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
- struct stat sb;
-
- *script = '\0';
- if (!is_directory(purl + 1, 1, &sb)) {
- /* not directory, found script.cgi/PATH_INFO */
- *script = '/';
- break;
- }
- *script = '/'; /* is directory, find next '/' */
- }
- setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */
- setenv1("REQUEST_METHOD", request);
- if (g_query) {
- putenv(xasprintf("%s=%s?%s", "REQUEST_URI", purl, g_query));
- } else {
- setenv1("REQUEST_URI", purl);
- }
- if (script != NULL)
- *script = '\0'; /* cut off /PATH_INFO */
-
- /* SCRIPT_FILENAME required by PHP in CGI mode */
- fullpath = concat_path_file(home_httpd, purl);
- setenv1("SCRIPT_FILENAME", fullpath);
- /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
- setenv1("SCRIPT_NAME", purl);
- /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
- * QUERY_STRING: The information which follows the ? in the URL
- * which referenced this script. This is the query information.
- * It should not be decoded in any fashion. This variable
- * should always be set when there is query information,
- * regardless of command line decoding. */
- /* (Older versions of bbox seem to do some decoding) */
- setenv1("QUERY_STRING", g_query);
- putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
- putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
- putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
- /* Having _separate_ variables for IP and port defeats
- * the purpose of having socket abstraction. Which "port"
- * are you using on Unix domain socket?
- * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
- * Oh well... */
- {
- char *p = rmt_ip_str ? rmt_ip_str : (char*)"";
- char *cp = strrchr(p, ':');
- if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
- cp = NULL;
- if (cp) *cp = '\0'; /* delete :PORT */
- setenv1("REMOTE_ADDR", p);
- if (cp) *cp = ':';
- }
- setenv1("HTTP_USER_AGENT", user_agent);
-#if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
- setenv_long("REMOTE_PORT", tcp_port);
-#endif
- if (bodyLen)
- setenv_long("CONTENT_LENGTH", bodyLen);
- if (cookie)
- setenv1("HTTP_COOKIE", cookie);
- if (content_type)
- setenv1("CONTENT_TYPE", content_type);
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- if (remoteuser) {
- setenv1("REMOTE_USER", remoteuser);
- putenv((char*)"AUTH_TYPE=Basic");
- }
-#endif
- if (referer)
- setenv1("HTTP_REFERER", referer);
-
- /* set execve argp[0] without path */
- argp[0] = (char*)bb_basename(purl);
- /* but script argp[0] must have absolute path */
+ /* script must have absolute path */
script = strrchr(fullpath, '/');
if (!script)
goto error_execing_cgi;
*script = '\0';
/* chdiring to script's dir */
if (chdir(fullpath) == 0) {
+ char *argv[2];
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
char *interpr = NULL;
char *suffix = strrchr(purl, '.');
}
#endif
*script = '/';
+ /* set argv[0] to name without path */
+ argv[0] = (char*)bb_basename(purl);
+ argv[1] = NULL;
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
if (interpr)
- execv(interpr, argp);
+ execv(interpr, argv);
else
#endif
- execv(fullpath, argp);
+ execv(fullpath, argv);
}
error_execing_cgi:
/* send to stdout
send_headers_and_exit(HTTP_NOT_FOUND);
} /* end child */
- /* parent process */
+ /* Parent process */
+
+ /* First, restore variables possibly changed by child */
+ xfunc_error_retval = 0;
+ accepted_socket = sv_accepted_socket;
+
+ /* Prepare for pumping data */
buf_count = 0;
post_read_size = 0;
post_read_idx = 0; /* for gcc */
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