int init_cgi(request * req)
{
int child_pid;
int pipes[2];
int use_pipes = 0;
SQUASH_KA(req);
if (req->is_cgi) {
if (complete_env(req) == 0) {
return 0;
}
}
if (req->is_cgi == CGI || 1) {
use_pipes = 1;
if (pipe(pipes) == -1) {
log_error_time();
perror("pipe");
return 0;
}
/* set the read end of the socket to non-blocking */
if (set_nonblock_fd(pipes[0]) == -1) {
log_error_time();
perror("cgi-fcntl");
close(pipes[0]);
close(pipes[1]);
return 0;
}
}
child_pid = fork();
switch(child_pid) {
case -1:
/* fork unsuccessful */
log_error_time();
perror("fork");
if (use_pipes) {
close(pipes[0]);
close(pipes[1]);
}
send_r_error(req);
/* FIXME: There is aproblem here. send_r_error would work
for NPH and CGI, but not for GUNZIP. Fix that. */
/* i'd like to send_r_error, but.... */
return 0;
break;
case 0:
/* child */
if (req->is_cgi == CGI || req->is_cgi == NPH) {
char *foo = strdup(req->pathname);
char *c;
if (!foo) {
WARN("unable to strdup pathname for req->pathname");
_exit(1);
}
c = strrchr(foo, '/');
if (c) {
++c;
*c = '\0';
} else {
/* we have a serious problem */
log_error_time();
perror("chdir");
if (use_pipes)
close(pipes[1]);
_exit(1);
}
if (chdir(foo) != 0) {
log_error_time();
perror("chdir");
if (use_pipes)
close(pipes[1]);
_exit(1);
}
}
if (use_pipes) {
close(pipes[0]);
/* tie cgi's STDOUT to it's write end of pipe */
if (dup2(pipes[1], STDOUT_FILENO) == -1) {
log_error_time();
perror("dup2 - pipes");
close(pipes[1]);
_exit(1);
}
close(pipes[1]);
if (set_block_fd(STDOUT_FILENO) == -1) {
log_error_time();
perror("cgi-fcntl");
_exit(1);
}
} else {
/* tie stdout to socket */
if (dup2(req->fd, STDOUT_FILENO) == -1) {
log_error_time();
perror("dup2 - fd");
_exit(1);
}
/* Switch socket flags back to blocking */
if (set_block_fd(req->fd) == -1) {
log_error_time();
perror("cgi-fcntl");
_exit(1);
}
}
/* tie post_data_fd to POST stdin */
if (req->method == M_POST) { /* tie stdin to file */
lseek(req->post_data_fd, SEEK_SET, 0);
dup2(req->post_data_fd, STDIN_FILENO);
close(req->post_data_fd);
}
/* Close access log, so CGI program can't scribble
* where it shouldn't
*/
close_access_log();
/*
* tie STDERR to cgi_log_fd
* cgi_log_fd will automatically close, close-on-exec rocks!
* if we don't tied STDERR (current log_error) to cgi_log_fd,
* then we ought to close it.
*/
//if (!cgi_log_fd)
// dup2(devnullfd, STDERR_FILENO);
//else
// dup2(cgi_log_fd, STDERR_FILENO);
if (req->is_cgi) {
char *aargv[CGI_ARGC_MAX + 1];
create_argv(req, aargv);
execve(req->pathname, aargv, req->cgi_env);
} else {
if (req->pathname[strlen(req->pathname) - 1] == '/')
execl(dirmaker, dirmaker, req->pathname, req->request_uri,
NULL);
#ifdef GUNZIP
else
execl(GUNZIP, GUNZIP, "--stdout", "--decompress",
req->pathname, NULL);
#endif
}
/* execve failed */
WARN(req->pathname);
_exit(1);
break;
default:
/* parent */
/* if here, fork was successful */
if (verbose_cgi_logs) {
log_error_time();
fprintf(stderr, "Forked child \"%s\" pid %d\n",
req->pathname, child_pid);
}
if (req->method == M_POST) {
close(req->post_data_fd); /* child closed it too */
req->post_data_fd = 0;
}
/* NPH, GUNZIP, etc... all go straight to the fd */
if (!use_pipes)
return 0;
close(pipes[1]);
req->data_fd = pipes[0];
req->status = PIPE_READ;
if (req->is_cgi == CGI) {
req->cgi_status = CGI_PARSE; /* got to parse cgi header */
/* for cgi_header... I get half the buffer! */
req->header_line = req->header_end =
(req->buffer + BUFFER_SIZE / 2);
} else {
req->cgi_status = CGI_BUFFER;
/* I get all the buffer! */
req->header_line = req->header_end = req->buffer;
}
/* reset req->filepos for logging (it's used in pipe.c) */
/* still don't know why req->filesize might be reset though */
req->filepos = 0;
break;
}
return 1;
}
int init_cgi(request * req)
{
#ifndef EXCLUDE_CGI
int child_pid;
int pipes[2];
int use_pipes = 0;
#endif
SQUASH_KA(req);
#ifndef EXCLUDE_CGI
if (req->cgi_type) {
if (complete_env(req) == 0) {
return 0;
}
}
DEBUG(DEBUG_CGI_ENV) {
int i;
for (i = 0; i < req->cgi_env_index; ++i)
log_error_time();
fprintf(stderr, "%s - environment variable for cgi: \"%s\"\n",
__FILE__, req->cgi_env[i]);
}
/* we want to use pipes whenever it's a CGI or directory */
/* otherwise (NPH, gunzip) we want no pipes */
if (req->cgi_type == CGI ||
(!req->cgi_type &&
(req->pathname[strlen(req->pathname) - 1] == '/'))) {
use_pipes = 1;
if (pipe(pipes) == -1) {
log_error_doc(req);
perror("pipe");
return 0;
}
/* set the read end of the socket to non-blocking */
if (set_nonblock_fd(pipes[0]) == -1) {
log_error_doc(req);
perror("cgi-fcntl");
close(pipes[0]);
close(pipes[1]);
return 0;
}
}
child_pid = fork();
switch (child_pid) {
case -1:
/* fork unsuccessful */
/* FIXME: There is a problem here. send_r_error (called by
* boa_perror) would work for NPH and CGI, but not for GUNZIP.
* Fix that.
*/
boa_perror(req, "fork failed");
if (use_pipes) {
close(pipes[0]);
close(pipes[1]);
}
return 0;
break;
case 0:
/* child */
reset_signals();
if (req->cgi_type == CGI || req->cgi_type == NPH) {
char *c;
unsigned int l;
char *newpath, *oldpath;
c = strrchr(req->pathname, '/');
if (!c) {
/* there will always be a '.' */
log_error_doc(req);
fprintf(stderr,
"unable to find '/' in req->pathname: \"%s\"\n",
req->pathname);
if (use_pipes)
close(pipes[1]);
_exit(EXIT_FAILURE);
}
*c = '\0';
if (chdir(req->pathname) != 0) {
int saved_errno = errno;
log_error_doc(req);
fprintf(stderr, "Could not chdir to \"%s\":",
req->pathname);
errno = saved_errno;
perror("chdir");
if (use_pipes)
close(pipes[1]);
_exit(EXIT_FAILURE);
}
oldpath = req->pathname;
req->pathname = ++c;
l = strlen(req->pathname) + 3;
/* prefix './' */
newpath = malloc(sizeof (char) * l);
if (!newpath) {
/* there will always be a '.' */
log_error_doc(req);
perror("unable to malloc for newpath");
if (use_pipes)
close(pipes[1]);
_exit(EXIT_FAILURE);
}
newpath[0] = '.';
newpath[1] = '/';
memcpy(&newpath[2], req->pathname, l - 2); /* includes the trailing '\0' */
free(oldpath);
req->pathname = newpath;
}
if (use_pipes) {
/* close the 'read' end of the pipes[] */
close(pipes[0]);
/* tie CGI's STDOUT to our write end of pipe */
if (dup2(pipes[1], STDOUT_FILENO) == -1) {
log_error_doc(req);
perror("dup2 - pipes");
_exit(EXIT_FAILURE);
}
close(pipes[1]);
} else {
/* tie stdout to socket */
if (dup2(req->fd, STDOUT_FILENO) == -1) {
log_error_doc(req);
perror("dup2 - fd");
_exit(EXIT_FAILURE);
}
close(req->fd);
}
/* Switch socket flags back to blocking */
if (set_block_fd(STDOUT_FILENO) == -1) {
log_error_doc(req);
perror("cgi-fcntl");
_exit(EXIT_FAILURE);
}
/* tie post_data_fd to POST stdin */
if (req->method == M_POST) { /* tie stdin to file */
// davidhsu ----------------------
#ifndef NEW_POST
lseek(req->post_data_fd, SEEK_SET, 0);
dup2(req->post_data_fd, STDIN_FILENO);
close(req->post_data_fd);
#endif
//-------------------------------
}
#ifdef USE_SETRLIMIT
/* setrlimit stuff.
* This is neat!
* RLIMIT_STACK max stack size
* RLIMIT_CORE max core file size
* RLIMIT_RSS max resident set size
* RLIMIT_NPROC max number of processes
* RLIMIT_NOFILE max number of open files
* RLIMIT_MEMLOCK max locked-in-memory address space
* RLIMIT_AS address space (virtual memory) limit
*
* RLIMIT_CPU CPU time in seconds
* RLIMIT_DATA max data size
*
* Currently, we only limit the CPU time and the DATA segment
* We also "nice" the process.
*
* This section of code adapted from patches sent in by Steve Thompson
* (no email available)
*/
{
struct rlimit rl;
int retval;
if (cgi_rlimit_cpu) {
rl.rlim_cur = rl.rlim_max = cgi_rlimit_cpu;
retval = setrlimit(RLIMIT_CPU, &rl);
if (retval == -1) {
log_error_time();
fprintf(stderr,
"setrlimit(RLIMIT_CPU,%d): %s\n",
rlimit_cpu, strerror(errno));
_exit(EXIT_FAILURE);
}
}
if (cgi_limit_data) {
rl.rlim_cur = rl.rlim_max = cgi_rlimit_data;
retval = setrlimit(RLIMIT_DATA, &rl);
if (retval == -1) {
log_error_time();
fprintf(stderr,
"setrlimit(RLIMIT_DATA,%d): %s\n",
rlimit_data, strerror(errno));
_exit(EXIT_FAILURE);
}
}
if (cgi_nice) {
retval = nice(cgi_nice);
if (retval == -1) {
log_error_time();
perror("nice");
_exit(EXIT_FAILURE);
}
}
}
#endif
umask(cgi_umask); /* change umask *again* u=rwx,g=rxw,o= */
/*
* tie STDERR to cgi_log_fd
* cgi_log_fd will automatically close, close-on-exec rocks!
* if we don't tie STDERR (current log_error) to cgi_log_fd,
* then we ought to tie it to /dev/null
* FIXME: we currently don't tie it to /dev/null, we leave it
* tied to whatever 'error_log' points to. This means CGIs can
* scribble on the error_log, probably a bad thing.
*/
if (cgi_log_fd) {
dup2(cgi_log_fd, STDERR_FILENO);
}
if (req->cgi_type) {
char *aargv[CGI_ARGC_MAX + 1];
create_argv(req, aargv);
execve(req->pathname, aargv, req->cgi_env);
} else {
if (req->pathname[strlen(req->pathname) - 1] == '/')
execl(dirmaker, dirmaker, req->pathname, req->request_uri,
(void *) NULL);
#ifdef GUNZIP
else
execl(GUNZIP, GUNZIP, "--stdout", "--decompress",
req->pathname, (void *) NULL);
#endif
}
/* execve failed */
log_error_doc(req);
fprintf(stderr, "Unable to execve/execl pathname: \"%s\"",
req->pathname);
perror("");
_exit(EXIT_FAILURE);
break;
default:
/* parent */
/* if here, fork was successful */
if (verbose_cgi_logs) {
log_error_time();
fprintf(stderr, "Forked child \"%s\" pid %d\n",
req->pathname, child_pid);
}
if (req->method == M_POST) {
// davidhsu ----------------
#ifndef NEW_POST
close(req->post_data_fd); /* child closed it too */
req->post_data_fd = 0;
#else
if (req->post_data) {
free(req->post_data);
req->post_data = NULL;
}
req->post_data_len = 0;
req->post_data_idx = 0;
#endif
//------------------------
}
/* NPH, GUNZIP, etc... all go straight to the fd */
if (!use_pipes)
return 0;
close(pipes[1]);
req->data_fd = pipes[0];
req->status = PIPE_READ;
if (req->cgi_type == CGI) {
req->cgi_status = CGI_PARSE; /* got to parse cgi header */
/* for cgi_header... I get half the buffer! */
req->header_line = req->header_end =
(req->buffer + BUFFER_SIZE / 2);
} else {
req->cgi_status = CGI_BUFFER;
/* I get all the buffer! */
req->header_line = req->header_end = req->buffer;
}
/* reset req->filepos for logging (it's used in pipe.c) */
/* still don't know why req->filesize might be reset though */
req->filepos = 0;
break;
}
#endif //!EXCLUDE_CGI
return 1;
}
int init_cgi(request * req)
{
int child_pid;
int pipes[2];
int use_pipes = 0;
SQUASH_KA(req);
if (req->is_cgi) {
if (complete_env(req) == 0) {
return 0;
}
}
#ifdef FASCIST_LOGGING
{
int i;
for (i = 0; i < req->cgi_env_index; ++i)
fprintf(stderr, "%s - environment variable for cgi: \"%s\"\n",
__FILE__, req->cgi_env[i]);
}
#endif
if (req->is_cgi == CGI || 1) {
use_pipes = 1;
if (pipe(pipes) == -1) {
log_error_time();
perror("pipe");
return 0;
}
if (set_nonblock_fd(pipes[0]) == -1) {
log_error_time();
perror("cgi-fcntl");
close(pipes[0]);
close(pipes[1]);
return 0;
}
}
child_pid = fork();
switch(child_pid) {
case -1:
log_error_time();
perror("fork");
if (use_pipes) {
close(pipes[0]);
close(pipes[1]);
}
send_r_error(req);
/* FIXME: There is aproblem here. send_r_error would work
for NPH and CGI, but not for GUNZIP. Fix that. */
return 0;
break;
case 0:
if (req->is_cgi == CGI || req->is_cgi == NPH) {
char *foo = strdup(req->pathname);
char *c;
if (!foo) {
WARN("unable to strdup pathname for req->pathname");
_exit(1);
}
c = strrchr(foo, '/');
if (c) {
++c;
*c = '\0';
} else {
log_error_time();
perror("chdir");
if (use_pipes)
close(pipes[1]);
_exit(1);
}
if (chdir(foo) != 0) {
log_error_time();
perror("chdir");
if (use_pipes)
close(pipes[1]);
_exit(1);
}
}
if (use_pipes) {
close(pipes[0]);
if (dup2(pipes[1], STDOUT_FILENO) == -1) {
log_error_time();
perror("dup2 - pipes");
close(pipes[1]);
_exit(1);
}
close(pipes[1]);
if (set_block_fd(STDOUT_FILENO) == -1) {
log_error_time();
perror("cgi-fcntl");
_exit(1);
}
} else {
if (dup2(req->fd, STDOUT_FILENO) == -1) {
log_error_time();
perror("dup2 - fd");
_exit(1);
}
if (set_block_fd(req->fd) == -1) {
log_error_time();
perror("cgi-fcntl");
_exit(1);
}
}
if (req->method == M_POST) {
lseek(req->post_data_fd, SEEK_SET, 0);
dup2(req->post_data_fd, STDIN_FILENO);
close(req->post_data_fd);
}
/* Close access log, so CGI program can't scribble
* where it shouldn't
*/
close_access_log();
/*
* tie STDERR to cgi_log_fd
* cgi_log_fd will automatically close, close-on-exec rocks!
* if we don't tied STDERR (current log_error) to cgi_log_fd,
* then we ought to close it.
*/
if (!cgi_log_fd)
dup2(devnullfd, STDERR_FILENO);
else
dup2(cgi_log_fd, STDERR_FILENO);
if (req->is_cgi) {
char *aargv[CGI_ARGC_MAX + 1];
create_argv(req, aargv);
execve(req->pathname, aargv, req->cgi_env);
} else {
if (req->pathname[strlen(req->pathname) - 1] == '/')
execl(dirmaker, dirmaker, req->pathname, req->request_uri,
NULL);
#ifdef GUNZIP
else
execl(GUNZIP, GUNZIP, "--stdout", "--decompress",
req->pathname, NULL);
#endif
}
WARN(req->pathname);
_exit(1);
break;
default:
if (verbose_cgi_logs) {
log_error_time();
fprintf(stderr, "Forked child \"%s\" pid %d\n",
req->pathname, child_pid);
}
if (req->method == M_POST) {
close(req->post_data_fd);
req->post_data_fd = 0;
}
if (!use_pipes)
return 0;
close(pipes[1]);
req->data_fd = pipes[0];
req->status = PIPE_READ;
if (req->is_cgi == CGI) {
req->cgi_status = CGI_PARSE;
req->header_line = req->header_end =
(req->buffer + BUFFER_SIZE / 2);
} else {
req->cgi_status = CGI_BUFFER;
req->header_line = req->header_end = req->buffer;
}
req->filepos = 0;
break;
}
return 1;
}
