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cgi.c
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cgi.c
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/*
* cgi.c -- CGI processing (for the GoAhead Web server
*
* Copyright (c) GoAhead Software Inc., 1995-2010. All Rights Reserved.
*
* See the file "license.txt" for usage and redistribution license requirements
*
*/
/********************************** Description *******************************/
/*
* This module implements the /cgi-bin handler. CGI processing differs from
* goforms processing in that each CGI request is executed as a separate
* process, rather than within the webserver process. For each CGI request the
* environment of the new process must be set to include all the CGI variables
* and its standard input and output must be directed to the socket. This
* is done using temporary files.
*/
/*********************************** Includes *********************************/
#include "wsIntrn.h"
#include "uemf.h"
/************************************ Locals **********************************/
typedef struct { /* Struct for CGI tasks which have completed */
webs_t wp; /* pointer to session websRec */
char_t *stdIn; /* file desc. for task's temp input fd */
char_t *stdOut; /* file desc. for task's temp output fd */
char_t *cgiPath; /* path to executable process file */
char_t **argp; /* pointer to buf containing argv tokens */
char_t **envp; /* pointer to array of environment strings */
int handle; /* process handle of the task */
long fplacemark; /* seek location for CGI output file */
} cgiRec;
static cgiRec **cgiList; /* hAlloc chain list of wp's to be closed */
static int cgiMax; /* Size of hAlloc list */
/************************************* Code ***********************************/
/*
* Process a form request. Returns 1 always to indicate it handled the URL
*/
int websCgiHandler(webs_t wp, char_t *urlPrefix, char_t *webDir, int arg,
char_t *url, char_t *path, char_t* query)
{
cgiRec *cgip;
sym_t *s;
char_t cgiBuf[FNAMESIZE], *stdIn, *stdOut, cwd[FNAMESIZE];
char_t *cp, *cgiName, *cgiPath, **argp, **envp, **ep;
int n, envpsize, argpsize, pHandle, cid, rc;
a_assert(websValid(wp));
a_assert(url && *url);
a_assert(path && *path == '/');
/*
* If the whitelist check fails, try to rebuild the list right away
* and try one more time. Whitelist just checks that the file exists
* under the current www root. We will check if it is executable below.
*/
#ifdef WEBS_WHITELIST_SUPPORT
if ((rc = websWhitelistCheck(wp->url)) < 0 || !(rc & WHITELIST_CGI)) {
websBuildWhitelist();
if ((rc = websWhitelistCheck(wp->url)) < 0 || !(rc & WHITELIST_CGI)) {
websError(wp, 500, T("Invalid CGI URL"));
return 1;
}
}
if (!(wp->flags & WEBS_SECURE) && (rc & WHITELIST_SSL)) {
websError(wp, 500, T("HTTPS Access Required"));
return 1;
}
#endif /* WEBS_WHITELIST_SUPPORT */
websStats.cgiHits++;
/*
* Extract the form name and then build the full path name. The form
* name will follow the first '/' in path.
*/
gstrncpy(cgiBuf, path, TSZ(cgiBuf));
if ((cgiName = gstrchr(&cgiBuf[1], '/')) == NULL) {
websError(wp, 200, T("Missing CGI name"));
return 1;
}
cgiName++;
if ((cp = gstrchr(cgiName, '/')) != NULL) {
*cp = '\0';
}
fmtAlloc(&cgiPath, FNAMESIZE, T("%s/%s/%s"), websGetDefaultDir(),
CGI_BIN, cgiName);
#ifndef VXWORKS
/*
* See if the file exists and is executable. If not error out.
* Don't do this step for VxWorks, since the module may already
* be part of the OS image, rather than in the file system.
*/
{
gstat_t sbuf;
if (gstat(cgiPath, &sbuf) != 0 || (sbuf.st_mode & S_IFREG) == 0) {
websError(wp, 404, T("CGI process file does not exist"));
bfree(B_L, cgiPath);
return 1;
}
#if (defined (WIN) || defined (CE))
if (gstrstr(cgiPath, T(".exe")) == NULL &&
gstrstr(cgiPath, T(".bat")) == NULL) {
#elif (defined (NW))
if (gstrstr(cgiPath, T(".nlm")) == NULL) {
#else
if (gaccess(cgiPath, X_OK) != 0) {
#endif /* WIN || CE */
websError(wp, 200, T("CGI process file is not executable"));
bfree(B_L, cgiPath);
return 1;
}
}
#endif /* ! VXWORKS */
/*
* Get the CWD for resetting after launching the child process CGI
*/
ggetcwd(cwd, FNAMESIZE);
/*
* Retrieve the directory of the child process CGI
*/
if ((cp = gstrrchr(cgiPath, '/')) != NULL) {
*cp = '\0';
gchdir(cgiPath);
*cp = '/';
}
/*
* Build command line arguments. Only used if there is no non-encoded
* = character. This is indicative of a ISINDEX query. POST separators
* are & and others are +. argp will point to a balloc'd array of
* pointers. Each pointer will point to substring within the
* query string. This array of string pointers is how the spawn or
* exec routines expect command line arguments to be passed. Since
* we don't know ahead of time how many individual items there are in
* the query string, the for loop includes logic to grow the array
* size via brealloc.
*/
argpsize = 10;
argp = balloc(B_L, argpsize * sizeof(char_t *));
*argp = cgiPath;
n = 1;
if (gstrchr(query, '=') == NULL) {
websDecodeUrl(query, query, gstrlen(query));
for (cp = gstrtok(query, T(" ")); cp != NULL; ) {
*(argp+n) = cp;
n++;
if (n >= argpsize) {
argpsize *= 2;
argp = brealloc(B_L, argp, argpsize * sizeof(char_t *));
}
cp = gstrtok(NULL, T(" "));
}
}
*(argp+n) = NULL;
/*
* Add all CGI variables to the environment strings to be passed
* to the spawned CGI process. This includes a few we don't
* already have in the symbol table, plus all those that are in
* the cgiVars symbol table. envp will point to a balloc'd array of
* pointers. Each pointer will point to a balloc'd string containing
* the keyword value pair in the form keyword=value. Since we don't
* know ahead of time how many environment strings there will be the
* for loop includes logic to grow the array size via brealloc.
*/
envpsize = WEBS_SYM_INIT;
envp = balloc(B_L, envpsize * sizeof(char_t *));
n = 0;
fmtAlloc(envp+n, FNAMESIZE, T("%s=%s"),T("PATH_TRANSLATED"), cgiPath);
n++;
fmtAlloc(envp+n, FNAMESIZE, T("%s=%s/%s"),T("SCRIPT_NAME"),
CGI_BIN, cgiName);
n++;
fmtAlloc(envp+n, FNAMESIZE, T("%s=%s"),T("REMOTE_USER"), wp->userName);
n++;
fmtAlloc(envp+n, FNAMESIZE, T("%s=%s"),T("AUTH_TYPE"), wp->authType);
n++;
for (s = symFirst(wp->cgiVars); s != NULL; s = symNext(wp->cgiVars)) {
if (s->content.valid && s->content.type == string &&
gstrcmp(s->name.value.string, T("REMOTE_HOST")) != 0 &&
gstrcmp(s->name.value.string, T("HTTP_AUTHORIZATION")) != 0) {
fmtAlloc(envp+n, FNAMESIZE, T("%s=%s"), s->name.value.string,
s->content.value.string);
n++;
if (n >= envpsize) {
envpsize *= 2;
envp = brealloc(B_L, envp, envpsize * sizeof(char_t *));
}
}
}
*(envp+n) = NULL;
/*
* Create temporary file name(s) for the child's stdin and stdout.
* For POST data the stdin temp file (and name) should already exist.
*/
if (wp->cgiStdin == NULL) {
wp->cgiStdin = websGetCgiCommName();
}
stdIn = wp->cgiStdin;
stdOut = websGetCgiCommName();
/*
* Now launch the process. If not successful, do the cleanup of resources.
* If successful, the cleanup will be done after the process completes.
*/
if ((pHandle = websLaunchCgiProc(cgiPath, argp, envp, stdIn, stdOut))
== -1) {
websError(wp, 200, T("failed to spawn CGI task"));
for (ep = envp; *ep != NULL; ep++) {
bfreeSafe(B_L, *ep);
}
bfreeSafe(B_L, cgiPath);
bfreeSafe(B_L, argp);
bfreeSafe(B_L, envp);
bfreeSafe(B_L, stdOut);
} else {
/*
* If the spawn was successful, put this wp on a queue to be
* checked for completion.
*/
cid = hAllocEntry((void***) &cgiList, &cgiMax, sizeof(cgiRec));
cgip = cgiList[cid];
cgip->handle = pHandle;
cgip->stdIn = stdIn;
cgip->stdOut = stdOut;
cgip->cgiPath = cgiPath;
cgip->argp = argp;
cgip->envp = envp;
cgip->wp = wp;
cgip->fplacemark = 0;
websTimeoutCancel(wp);
}
/*
* Restore the current working directory after spawning child CGI
*/
gchdir(cwd);
return 1;
}
/******************************************************************************/
/*
* Any entry in the cgiList need to be checked to see if it has
*/
void websCgiGatherOutput (cgiRec *cgip)
{
gstat_t sbuf;
char_t cgiBuf[FNAMESIZE];
#if defined(WIN32)
errno_t error;
#endif
if ((gstat(cgip->stdOut, &sbuf) == 0) &&
(sbuf.st_size > cgip->fplacemark)) {
int fdout;
#if !defined(WIN32)
fdout = gopen(cgip->stdOut, O_RDONLY | O_BINARY, 0444 );
#else
error = _sopen_s(&fdout, cgip->stdOut, O_RDONLY | O_BINARY, _SH_DENYNO, 0444);
#endif
/*
* Check to see if any data is available in the
* output file and send its contents to the socket.
*/
if (fdout >= 0) {
webs_t wp = cgip->wp;
int nRead;
/*
* Write the HTTP header on our first pass
*/
if (cgip->fplacemark == 0) {
websWrite(wp, T("HTTP/1.0 200 OK\r\n"));
}
glseek(fdout, cgip->fplacemark, SEEK_SET);
while ((nRead = gread(fdout, cgiBuf, FNAMESIZE)) > 0) {
websWriteBlock(wp, cgiBuf, nRead);
cgip->fplacemark += nRead;
}
gclose(fdout);
}
}
}
/******************************************************************************/
/*
* Any entry in the cgiList need to be checked to see if it has
* completed, and if so, process its output and clean up.
*/
void websCgiCleanup()
{
cgiRec *cgip;
webs_t wp;
char_t **ep;
int cid, nTries;
for (cid = 0; cid < cgiMax; cid++) {
if ((cgip = cgiList[cid]) != NULL) {
wp = cgip->wp;
websCgiGatherOutput (cgip);
if (websCheckCgiProc(cgip->handle) == 0) {
/*
* We get here if the CGI process has terminated. Clean up.
*/
nTries = 0;
/*
* Make sure we didn't miss something during a task switch.
* Maximum wait is 100 times 10 msecs (1 second).
*/
while ((cgip->fplacemark == 0) && (nTries < 100)) {
websCgiGatherOutput(cgip);
/*
* There are some cases when we detect app exit
* before the file is ready.
*/
if (cgip->fplacemark == 0) {
#ifdef WIN
Sleep(10);
#endif /* WIN*/
}
nTries++;
}
if (cgip->fplacemark == 0) {
websError(wp, 200, T("CGI generated no output"));
} else {
websDone(wp, 200);
}
/*
* Remove the temporary re-direction files
*/
gunlink(cgip->stdIn);
gunlink(cgip->stdOut);
/*
* Free all the memory buffers pointed to by cgip.
* The stdin file name (wp->cgiStdin) gets freed as
* part of websFree().
*/
cgiMax = hFree((void***) &cgiList, cid);
for (ep = cgip->envp; ep != NULL && *ep != NULL; ep++) {
bfreeSafe(B_L, *ep);
}
bfreeSafe(B_L, cgip->cgiPath);
bfreeSafe(B_L, cgip->argp);
bfreeSafe(B_L, cgip->envp);
bfreeSafe(B_L, cgip->stdOut);
bfreeSafe(B_L, cgip);
}
}
}
}
/******************************************************************************/
/******************************************************************************/
/*
PLATFORM IMPLEMENTATIONS FOR CGI HELPERS
websGetCgiCommName
websLaunchCgiProc
websCheckCgiProc
*/
/******************************************************************************/
#ifdef CE
/******************************************************************************/
/*
* Returns a pointer to an allocated qualified unique temporary file name.
* This filename must eventually be deleted with bfree().
*/
char_t *websGetCgiCommName()
{
/*
* tmpnam, tempnam, tmpfile not supported for CE 2.12 or lower. The Win32 API
* GetTempFileName is scheduled to be part of CE 3.0.
*/
#if 0
char_t *pname1, *pname2;
pname1 = gtmpnam(NULL, T("cgi"));
pname2 = bstrdup(B_L, pname1);
free(pname1);
return pname2;
#endif
return NULL;
}
/******************************************************************************/
/*
* Launch the CGI process and return a handle to it.
* CE note: This function is not complete. The missing piece is the ability
* to redirect stdout.
*/
int websLaunchCgiProc(char_t *cgiPath, char_t **argp, char_t **envp,
char_t *stdIn, char_t *stdOut)
{
PROCESS_INFORMATION procinfo; /* Information about created proc */
DWORD dwCreateFlags;
char *fulldir;
BOOL bReturn;
int i, nLen;
/*
* Replace directory delimiters with Windows-friendly delimiters
*/
nLen = gstrlen(cgiPath);
for (i = 0; i < nLen; i++) {
if (cgiPath[i] == '/') {
cgiPath[i] = '\\';
}
}
fulldir = NULL;
dwCreateFlags = CREATE_NEW_CONSOLE;
/*
* CreateProcess returns errors sometimes, even when the process was
* started correctly. The cause is not evident. For now: we detect
* an error by checking the value of procinfo.hProcess after the call.
*/
procinfo.hThread = NULL;
bReturn = CreateProcess(
cgiPath, /* Name of executable module */
NULL, /* Command line string */
NULL, /* Process security attributes */
NULL, /* Thread security attributes */
0, /* Handle inheritance flag */
dwCreateFlags, /* Creation flags */
NULL, /* New environment block */
NULL, /* Current directory name */
NULL, /* STARTUPINFO */
&procinfo); /* PROCESS_INFORMATION */
if (bReturn == 0) {
DWORD dw;
dw = GetLastError();
return -1;
} else {
CloseHandle(procinfo.hThread);
}
return (int) procinfo.dwProcessId;
}
/******************************************************************************/
/*
* Check the CGI process. Return 0 if it does not exist; non 0 if it does.
*/
int websCheckCgiProc(int handle)
{
int nReturn;
DWORD exitCode;
nReturn = GetExitCodeProcess((HANDLE)handle, &exitCode);
/*
* We must close process handle to free up the window resource, but only
* when we're done with it.
*/
if ((nReturn == 0) || (exitCode != STILL_ACTIVE)) {
CloseHandle((HANDLE)handle);
return 0;
}
return 1;
}
/******************************************************************************/
#endif /* CE */
/******************************************************************************/
/******************************************************************************/
#if defined(LINUX) || defined(LYNX) || defined(MACOSX) || defined(QNX4)
/******************************************************************************/
#include <sys/wait.h>
/******************************************************************************/
/*
* Returns a pointer to an allocated qualified unique temporary file name.
* This filename must eventually be deleted with bfree();
*/
char_t *websGetCgiCommName()
{
char_t *pname1, *pname2;
pname1 = tempnam(NULL, T("cgi"));
pname2 = bstrdup(B_L, pname1);
free(pname1);
return pname2;
}
/******************************************************************************/
/*
* Launch the CGI process and return a handle to it.
*/
int websLaunchCgiProc(char_t *cgiPath, char_t **argp, char_t **envp,
char_t *stdIn, char_t *stdOut)
{
int pid, fdin, fdout, hstdin, hstdout, rc;
fdin = fdout = hstdin = hstdout = rc = -1;
if ((fdin = open(stdIn, O_RDWR | O_CREAT, 0666)) < 0 ||
(fdout = open(stdOut, O_RDWR | O_CREAT, 0666)) < 0 ||
(hstdin = dup(0)) == -1 ||
(hstdout = dup(1)) == -1 ||
dup2(fdin, 0) == -1 ||
dup2(fdout, 1) == -1) {
goto DONE;
}
rc = pid = fork();
if (pid == 0) {
/*
* if pid == 0, then we are in the child process
*/
if (execve(cgiPath, argp, envp) == -1) {
printf("content-type: text/html\n\n"
"Execution of cgi process failed\n");
}
exit (0);
}
DONE:
if (hstdout >= 0) {
dup2(hstdout, 1);
close(hstdout);
}
if (hstdin >= 0) {
dup2(hstdin, 0);
close(hstdin);
}
if (fdout >= 0) {
close(fdout);
}
if (fdin >= 0) {
close(fdin);
}
return rc;
}
/******************************************************************************/
/*
* Check the CGI process. Return 0 if it does not exist; non 0 if it does.
*/
int websCheckCgiProc(int handle)
{
/*
* Check to see if the CGI child process has terminated or not yet.
*/
if (waitpid(handle, NULL, WNOHANG) == handle) {
return 0;
} else {
return 1;
}
}
/******************************************************************************/
#endif /* LINUX || LYNX || MACOSX || QNX4 */
/******************************************************************************/
/******************************************************************************/
#ifdef NW
/******************************************************************************/
/******************************************************************************/
/*
* Returns a pointer to an allocated qualified unique temporary file name.
* This filename must eventually be deleted with bfree();
*/
char_t *websGetCgiCommName()
{
char_t *pname;
pname = bstrdup(B_L, tmpnam( NULL ) );
return pname;
}
/******************************************************************************/
/*
* Launch the CGI process and return a handle to it.
*/
int websLaunchCgiProc(char_t *cgiPath, char_t **argp, char_t **envp,
char_t *stdIn, char_t *stdOut)
{
int pid, fdin, fdout, hstdin, hstdout, rc;
fdin = fdout = -1;
if ((fdin = open(stdIn, O_RDWR | O_CREAT, 0666)) < 0 ||
(fdout = open(stdOut, O_RDWR | O_CREAT, 0666)) < 0 )
goto DONE;
/* COMMENTED BLOCK ùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù
* printf( "[%s]\n[", cgiPath ) ;
* {
* char \**x = argp;
* while( *argp ) printf( "%s-", *argp ++ ) ;
*
* }
* printf( "]\n" ) ;
* END COMMENTS ùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù
*/
rc = spawnvp( P_NOWAIT, cgiPath, argp ) ;
if( rc != 0) {
exit (0);
}
DONE:
if (fdout >= 0) {
close(fdout);
}
if (fdin >= 0) {
close(fdin);
}
return rc;
}
/******************************************************************************/
/*
* Check the CGI process. Return 0 if it does not exist; non 0 if it does.
*/
int websCheckCgiProc(int handle)
{
/*
* Check to see if the CGI child process has terminated or not yet.
*/
if( handle ) {
return 0;
} else {
return 1;
}
}
/******************************************************************************/
#endif /* NW */
/******************************************************************************/
/******************************************************************************/
#ifdef VXWORKS
/******************************************************************************/
static void vxWebsCgiEntry(void *entryAddr(int argc, char_t **argv),
char_t **argv, char_t **envp, char_t *stdIn, char_t *stdOut);
/******************************************************************************/
/*
* Returns a pointer to an allocated qualified unique temporary file name.
* This filename must eventually be deleted with bfree();
*/
char_t *websGetCgiCommName()
{
char_t *tname, buf[FNAMESIZE];
fmtAlloc(&tname,FNAMESIZE, T("%s/%s"), ggetcwd(buf, FNAMESIZE),
tmpnam(NULL));
return tname;
}
/******************************************************************************/
/*
* Launch the CGI process and return a handle to it. Process spawning
* is not supported in VxWorks. Instead, we spawn a "task". A major
* difference is that we have to know the entry point for the taskSpawn
* API. Also the module may have to be loaded before being executed;
* it may also be part of the OS image, in which case it cannot be
* loaded or unloaded. The following sequence is used:
* 1. If the module is already loaded, unload it from memory.
* 2. Search for a query string keyword=value pair in the environment
* variables where the keyword is cgientry. If found use its value
* as the the entry point name. If there is no such pair set
* the entry point name to the default: basename_cgientry, where
* basename is the name of the cgi file without the extension. Use
* the entry point name in a symbol table search for that name to
* use as the entry point address. If successful go to step 5.
* 3. Try to load the module into memory. If not successful error out.
* 4. If step 3 is successful repeat the entry point search from step
* 2. If the entry point exists, go to step 5. If it does not,
* error out.
* 5. Use taskSpawn to start a new task which uses vxWebsCgiEntry
* as its starting point. The five arguments to vxWebsCgiEntry
* will be the user entry point address, argp, envp, stdIn
* and stdOut. vxWebsCgiEntry will convert argp to an argc
* argv pair to pass to the user entry, it will initialize the
* task environment with envp, it will open and redirect stdin
* and stdout to stdIn and stdOut, and then it will call the
* user entry.
* 6. Return the taskSpawn return value.
*/
int websLaunchCgiProc(char_t *cgiPath, char_t **argp, char_t **envp,
char_t *stdIn, char_t *stdOut)
{
SYM_TYPE ptype;
char_t *p, *basename, *pEntry, *pname, *entryAddr, **pp;
int priority, rc, fd;
/*
* Determine the basename, which is without path or the extension.
*/
if ((int)(p = gstrrchr(cgiPath, '/') + 1) == 1) {
p = cgiPath;
}
basename = bstrdup(B_L, p);
if ((p = gstrrchr(basename, '.')) != NULL) {
*p = '\0';
}
/*
* Unload the module, if it is already loaded. Get the current task
* priority.
*/
unld(cgiPath, 0);
taskPriorityGet(taskIdSelf(), &priority);
rc = fd = -1;
/*
* Set the entry point symbol name as described above. Look for an already
* loaded entry point; if it exists, spawn the task accordingly.
*/
for (pp = envp, pEntry = NULL; pp != NULL && *pp != NULL; pp++) {
if (gstrncmp(*pp, T("cgientry="), 9) == 0) {
pEntry = bstrdup(B_L, *pp + 9);
break;
}
}
if (pEntry == NULL) {
fmtAlloc(&pEntry, LF_PATHSIZE, T("%s_%s"), basename, T("cgientry"));
}
entryAddr = 0;
if (symFindByName(sysSymTbl, pEntry, &entryAddr, &ptype) == -1) {
fmtAlloc(&pname, VALUE_MAX_STRING, T("_%s"), pEntry);
symFindByName(sysSymTbl, pname, &entryAddr, &ptype);
bfreeSafe(B_L, pname);
}
if (entryAddr != 0) {
rc = taskSpawn(pEntry, priority, 0, 20000, (void *)vxWebsCgiEntry,
(int)entryAddr, (int)argp, (int)envp, (int)stdIn, (int)stdOut,
0, 0, 0, 0, 0);
goto DONE;
}
/*
* Try to load the module.
*/
if ((fd = gopen(cgiPath, O_RDONLY | O_BINARY, 0666)) < 0 ||
loadModule(fd, LOAD_GLOBAL_SYMBOLS) == NULL) {
goto DONE;
}
if ((symFindByName(sysSymTbl, pEntry, &entryAddr, &ptype)) == -1) {
fmtAlloc(&pname, VALUE_MAX_STRING, T("_%s"), pEntry);
symFindByName(sysSymTbl, pname, &entryAddr, &ptype);
bfreeSafe(B_L, pname);
}
if (entryAddr != 0) {
rc = taskSpawn(pEntry, priority, 0, 20000, (void *)vxWebsCgiEntry,
(int)entryAddr, (int)argp, (int)envp, (int)stdIn, (int)stdOut,
0, 0, 0, 0, 0);
}
DONE:
if (fd != -1) {
gclose(fd);
}
bfree(B_L, basename);
bfree(B_L, pEntry);
return rc;
}
/******************************************************************************/
/*
* This is the CGI process wrapper. It will open and redirect stdin
* and stdout to stdIn and stdOut. It converts argv to an argc, argv
* pair to pass to the user entry. It initializes the task environment
* with envp strings. Then it will call the user entry.
*/
static void vxWebsCgiEntry(void *entryAddr(int argc, char_t **argv),
char_t **argp, char_t **envp, char_t *stdIn, char_t *stdOut)
{
char_t **p;
int argc, taskId, fdin, fdout;
/*
* Open the stdIn and stdOut files and redirect stdin and stdout
* to them.
*/
taskId = taskIdSelf();
if ((fdout = gopen(stdOut, O_RDWR | O_CREAT, 0666)) < 0 &&
(fdout = creat(stdOut, O_RDWR)) < 0) {
exit(0);
}
ioTaskStdSet(taskId, 1, fdout);
if ((fdin = gopen(stdIn, O_RDONLY | O_CREAT, 0666)) < 0 &&
(fdin = creat(stdIn, O_RDWR)) < 0) {
printf("content-type: text/html\n\n"
"Can not create CGI stdin to %s\n", stdIn);
gclose(fdout);
exit (0);
}
ioTaskStdSet(taskId, 0, fdin);
/*
* Count the number of entries in argv
*/
for (argc = 0, p = argp; p != NULL && *p != NULL; p++, argc++) {
}
/*
* Create a private envirnonment and copy the envp strings to it.
*/
if (envPrivateCreate(taskId, -1) != OK) {
printf("content-type: text/html\n\n"
"Can not create CGI environment space\n");
gclose(fdin);
gclose(fdout);
exit (0);
}
for (p = envp; p != NULL && *p != NULL; p++) {
putenv(*p);
}
/*
* Call the user entry.
*/
(*entryAddr)(argc, argp);
/*
* The user code should return here for cleanup.
*/
envPrivateDestroy(taskId);
gclose(fdin);
gclose(fdout);
exit(0);
}
/******************************************************************************/
/*
* Check the CGI process. Return 0 if it does not exist; non 0 if it does.
*/
int websCheckCgiProc(int handle)
{
STATUS stat;
/*
* Verify the existence of a VxWorks task
*/
stat = taskIdVerify(handle);
if (stat == OK) {
return 1;
} else {
return 0;
}
}
/******************************************************************************/
#endif /* VXWORKS */
/******************************************************************************/
/******************************************************************************/
#ifdef WIN
/******************************************************************************/
/******************************************************************************/
/*
* Convert a table of strings into a single block of memory.
* The input table consists of an array of null-terminated strings,
* terminated in a null pointer.
* Returns the address of a block of memory allocated using the balloc()
* function. The returned pointer must be deleted using bfree().
* Returns NULL on error.
*/
static unsigned char *tableToBlock(char **table)
{
unsigned char *pBlock; /* Allocated block */
char *pEntry; /* Pointer into block */
size_t sizeBlock; /* Size of table */
int index; /* Index into string table */
a_assert(table);
/*
* Calculate the size of the data block. Allow for final null byte.
*/
sizeBlock = 1;
for (index = 0; table[index]; index++) {
sizeBlock += strlen(table[index]) + 1;
}
/*
* Allocate the data block and fill it with the strings
*/
pBlock = balloc(B_L, sizeBlock);
if (pBlock != NULL) {
pEntry = (char *) pBlock;
for (index = 0; table[index]; index++) {
strcpy(pEntry, table[index]);
pEntry += strlen(pEntry) + 1;
}
/*
* Terminate the data block with an extra null string
*/
*pEntry = '\0';
}
return pBlock;
}
/******************************************************************************/
/*
* Returns a pointer to an allocated qualified unique temporary file name.
* This filename must eventually be deleted with bfree().
*/
char_t *websGetCgiCommName()
{
char_t *pname1, *pname2;
pname1 = tempnam(NULL, T("cgi"));
pname2 = bstrdup(B_L, pname1);
free(pname1);
return pname2;
}
/******************************************************************************/
/*
* Create a temporary stdout file and launch the CGI process.
* Returns a handle to the spawned CGI process.
*/
int websLaunchCgiProc(char_t *cgiPath, char_t **argp, char_t **envp,
char_t *stdIn, char_t *stdOut)
{
STARTUPINFO newinfo;
SECURITY_ATTRIBUTES security;
PROCESS_INFORMATION procinfo; /* Information about created proc */
DWORD dwCreateFlags;
char_t *cmdLine;
char_t **pArgs;
BOOL bReturn;
int i, nLen;
unsigned char *pEnvData;
/*
* Replace directory delimiters with Windows-friendly delimiters
*/
nLen = gstrlen(cgiPath);
for (i = 0; i < nLen; i++) {
if (cgiPath[i] == '/') {
cgiPath[i] = '\\';
}
}
/*
* Calculate length of command line
*/
nLen = 0;
pArgs = argp;
while (pArgs && *pArgs && **pArgs) {
nLen += gstrlen(*pArgs) + 1;
pArgs++;
}
/*
* Construct command line
*/
cmdLine = balloc(B_L, sizeof(char_t) * nLen);
a_assert (cmdLine);
gstrcpy(cmdLine, "");
pArgs = argp;
while (pArgs && *pArgs && **pArgs) {
gstrcat(cmdLine, *pArgs);
gstrcat(cmdLine, T(" "));
pArgs++;
}
/*
* Create the process start-up information
*/
memset (&newinfo, 0, sizeof(newinfo));
newinfo.cb = sizeof(newinfo);
newinfo.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
newinfo.wShowWindow = SW_HIDE;
newinfo.lpTitle = NULL;
/*
* Create file handles for the spawned processes stdin and stdout files
*/
security.nLength = sizeof(SECURITY_ATTRIBUTES);
security.lpSecurityDescriptor = NULL;
security.bInheritHandle = TRUE;
/*
* Stdin file should already exist.
*/
newinfo.hStdInput = CreateFile(stdIn, GENERIC_READ,
FILE_SHARE_READ, &security, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
/*
* Stdout file is created and file pointer is reset to start.
*/
newinfo.hStdOutput = CreateFile(stdOut, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ + FILE_SHARE_WRITE, &security, OPEN_ALWAYS,