nginx 0.1.29 *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; bug appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.

/*
 * Copyright (C) Igor Sysoev
 */


#include <ngx_config.h>
#include <ngx_core.h>


#if (NGX_HAVE_MAP_ANON)

void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
{
    void  *p;

    p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0);

    if (p == MAP_FAILED) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "mmap(MAP_ANON|MAP_SHARED, %uz) failed", size);
        return NULL;
    }

    return p;
}

#elif (NGX_HAVE_MAP_DEVZERO)

void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
{
    void      *p;
    ngx_fd_t   fd;

    fd = open("/dev/zero", O_RDWR);

    if (fd == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "open(\"/dev/zero\") failed");
        return NULL;
    }

    p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);

    if (p == MAP_FAILED) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "mmap(/dev/zero, MAP_SHARED, %uz) failed", size);
        p = NULL;
    }

    if (close(fd) == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "close(\"/dev/zero\") failed");
    }

    return p;
}

#elif (NGX_HAVE_SYSVSHM)

#include <sys/ipc.h>
#include <sys/shm.h>


void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
{
    int    id;
    void  *p;

    id = shmget(IPC_PRIVATE, size, (SHM_R|SHM_W|IPC_CREAT));

    if (id == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "shmget(%uz) failed", size);
        return NULL;
    }

    ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "shmget id: %d", id);

    p = shmat(id, NULL, 0);

    if (p == (void *) -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmat() failed");
        p = NULL;
    }

    if (shmctl(id, IPC_RMID, NULL) == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmctl(IPC_RMID) failed");
        p = NULL;
    }

    return p;
}

#endif